For various coal mine related industries and powder processing enterprises, the ball press can be said to be very familiar, and it should be very clear. The entire material forming production line can be collectively referred to as the ball press machine production line, because the core of the entire material forming the equipment is the ball press machine.

When using the ball press machine production line for material processing, the topic that cannot be avoided is the precautions for use, because correct use can ensure normal and efficient production. Below we summarize a few precautions for using the ball press production line for your reference.

Precautions for the use of ball press machine production line

Briquette machines

1.Familiar with the equipment and skilled use

Operators should be proficient in the structure, performance, and role of various components of the ball press equipment production line. Only by understanding the principle of the equipment, the structure and performance of various parts, can the ball press be used correctly and better, thereby avoiding unnecessary errors. , Resulting in dangerous situations such as equipment damage and safety accidents.

2.Ensure lubrication measures

For mechanical equipment, the interaction between components and parts, and parts to parts, is the basic principle of transmitting power to the equipment. If the transmission components such as bearings and gears cannot be properly lubricated, they may cause The transmission and work freezes, even if it is damaged during hard work, which affects the normal production. Therefore, it is necessary to lubricate according to the parts marked on the lubrication chart, while keeping the lubrication points clean.

3. Pay attention to check the production line and equipment

During the operation of the ball press equipment production line, pay attention to check that the bearing temperature of each part does not exceed 60 ° C, and check whether the bolts of each part are loose, whether there is abnormal noise in the transmission part, and whether there is any abnormal phenomenon in the equipment. If there are problems with equipment parts, you must stop work in time to maintain the equipment to prevent accidents.

4.Ensure cleanliness

A clean and tidy working environment is also one of the necessary environments to improve work efficiency. The ball press production line processes powdery materials, so it is normal to have dust at work, but after finishing the work, it is necessary to deal with the dust floating on the equipment in time. The dust prevents the inside of the equipment from entering the dust and wears out the equipment parts. In addition to the working area of ​​the ball press production line, it is also necessary to ensure the sanitation and cleanliness of other areas, so that employees have a good working environment.

5. Adhere to the “four determinations” principle

The operators of the ball press production line must abide by the “four set” principle, that is, set the project, set the personnel, set the time, and set the measures. The “four set” principle of safe production is the basic requirement for ensuring safe production and the basic management method. No matter how high the production output is, it is not as important as safe production.

The above are the precautions for the use of the ball press production line. In general, safe production is the basis of production. Not only the safety of equipment, but also the safety of personnel and product safety are very important.

As a molding equipment for pressing various materials, the ball press machine can meet the pressing needs of different industries. However, the selected roller skin does not match the material to be pressed, which can easily cause the wear of the ball skin of the ball press. The degree of wear caused by different hardness is also different, so the selection of the material of the roller skin of the ball press is very important. So what are the materials of roller skins on the market? Which one is more wear-resistant?

The materials of common roller skins are divided into cast spring steel, alloy steel, bearing steel, etc. For different materials, the roller skins are different, and they all have their own advantages.

Briquetting Machine Structure

Cast spring steel

Cast spring steel has high hardenability, surface decarburization tendency is smaller than silicon steel, and its comprehensive mechanical properties are better than carbon steel after heat treatment. It has very good fatigue strength, excellent elasticity, and good plasticity and hardness. At the same time, the low price makes it more popular, but it has overheat sensitivity and tempering brittleness, so it is usually used on small-volume ball presses, and can press soft materials such as coal powder, coke powder, and charcoal powder.

Alloy steel

This alloy steel undergoes strict processing, and its hardness can reach HRC58-62. It has high strength and abrasion resistance, at the same time has certain corrosion resistance, and is easy to detach the ball. This alloy steel roll skin is forged Hitting parts are mainly used on medium and large-scale coal briquette presses, which can compact ore powder, iron fine powder, magnesium oxide, laterite nickel ore, etc.

metal briquette machine

Bearing steel

Compared with alloy steel, bearing steel has higher hardness and wear resistance, but also has uniform hardness, high elastic limit, high contact fatigue strength, necessary toughness, certain hardenability, Corrosion resistance. And as a ball press forging roller skin, it is more wear-resistant than the casting type.

It is not difficult to see that although the cost of the cast roller skin is low and can be replaced frequently after wear, this non-wearable roller skin is only increasing the price of the ball press in disguise. The cost paid by the operator will only change with the use of time. It is gradually improved, and the forged rolls of chromium-molybdenum alloys are more wear-resistant. You only need to pay for one return. The forged rolls of bearing steel have higher performance than chrome-molybdenum alloys, which can meet the long-term Usage requirements.

High-pressure roller mills are widely used in major mines and related material crushing industries. They have the characteristics of large production capacity, fine output granularity, low unit energy consumption and low steel consumption. After years of research, it is found that the particle size of the high-pressure roller mill is not only related to the nature of the original ore, but also related to the operation and other factors.

First, roll surface pressure

It was found through experiments that by increasing the pressure on the roll surface of the high-pressure roller mill, the output particle size of the middle and side materials became finer, the particle size distribution of the middle material was more concentrated, and the particle size distribution of the side material was more uniform. The crushing effect of high-pressure roller mills on materials mainly depends on the pressure on the materials near the small distance between the two rollers. Usually, the specific pressure (the ratio of the total pressure provided by the hydraulic system to the diameter and width of the rollers) is used as a measure of the working pressure. Job parameters.

With the increase of the pressure on the roll surface, the uniformity coefficient of the middle material increases, the particle size distribution is more concentrated, the crushing ratio increases, the output particle size becomes finer, and the fine-grained part of the middle material after the crushing accounts for the majority; As the pressure increases, the uniformity coefficient of the edge material decreases, the particle size distribution becomes wider, the crushing ratio increases, and the discharge particle size becomes finer. The high-pressure roller mill edge material is closer to the conventional crushed product.

Use of roller mill

The fine-grained part of the crushed media is the majority. This is because the “size effect” of the mineral particles (the mechanical strength of the ore particles increases significantly with the decrease of the ore size) during the pulverization process. The fine-grained materials are more difficult to pulverize than the coarse-grained materials under the pressure of the roll surface, so that the fine-grained materials account for the majority.

The high-pressure roller mill side material is closer to the conventional crushed product, which is caused by the “edge effect” of the pressure roller during the crushing process. The lower roller surface pressure on the baffles at both ends of the pressure roller and the edge of the pressure roller makes the material easily slide relative to the edge of the pressure roller, reducing the crushing effect of the material layer, so that the crushing method of the material by the edge of the roller is closer to the conventional crushing method .

Second, the speed of the roller surface

Under the same roll surface pressure, when the roll surface speed is increased to a certain amount, the uniformity coefficient of the intermediate material increases, the particle size distribution is more concentrated, the crushing ratio increases, and the product particle size becomes finer, but it affects the uniformity coefficient of the side material and The change of the crushing ratio is not obvious; but when the speed of the roller surface is continuously increased, the change of the crushing ratio of the intermediate material is no longer obvious.

The appropriate speed is related to the surface characteristics of the roll, the hardness of the material, and the size of the ore feed. The speed of the roll surface directly affects the crushing capacity and the degree of wear on the roll surface, and it will affect the particle size characteristics of the product. Increasing the speed of the roller surface has little effect on the particle size characteristics of the discharge, and the unit energy consumption of the high-pressure roller mill has not changed significantly, but its processing capacity has been greatly enhanced. However, higher roller surface speed will wear the roller surface and bearings, which will affect the service life of the equipment.

High-Pressure Grinding Rolls

Third, the material moisture content

The raw ore produced on site often has a certain water content. With the change of the water content of the ore, the strength and viscosity of the ore change, which will affect the material characteristics of the crushing process. When the roller surface pressure and roller surface speed are constant, the ore moisture content increases, the uniformity coefficient of the middle material increases, and the particle size distribution is more concentrated; the crushing ratio of the side material increases, but the increase is not obvious, and the particle size distribution becomes wider.

It can be seen that the increase of the moisture content of the raw material has little effect on the particle size of the discharge. At the same time, the moisture content of the material at the production site of the high-pressure roller mill is generally between 3% and 5%, so in normal production, it will not affect The discharge has a greater impact.

In summary, in fact, most of the factors affecting the output particle size of the high-pressure roller mill are in the operation mode. When the appropriate roller surface pressure and roller surface speed are selected, the output particle size of the high-pressure roller mill can reach production. Demand, which requires the production personnel to have a considerable degree of familiarity with the raw ore materials and mechanical equipment, so for the actual operators, their professionalism is the key factor affecting the particle size of the high-pressure roller mill.

High-pressure roller mills are commonly used in the medium crushing, fine milling, and ultra-fine milling processes of various loose materials. Compared with other traditional crushers, they have the advantages of high productivity and low energy consumption. However, after a period of use, due to operating errors or inadequate maintenance work, high-pressure roller mills may operate abnormally. These failures are often seen in daily work, so how to deal with them to ensure the normal production of the equipment How about it?

metal briquette machine

First, the abnormal vibration of the high-pressure roller mill body

1. If the body of the high-pressure roller mill is experiencing abnormal vibrations, it is likely that the granularity of the material is not uniform, which leads to the imbalance of the squeeze force of the equipment. Therefore, the particle size of the material needs to be adjusted to make it as uniform as possible, so that The crushing force of the device is normal.

2. Another cause of abnormal vibration of the body may be caused by severe wear of the blade. When the blade is severely worn and the feeding amount is not large, it will cause the blade to be unable to scoop up the material, and sometimes there is no abnormal vibration caused when the roller squeezes the material. Generally, this situation can be periodically checked and replaced.

3. Sometimes the material is too hard, which will lead to abnormal start-up of the equipment. In severe cases, it may also cause deformation and wear of the grinding ring and the ring, which will aggravate vibration. In order to prevent this situation, in addition to no longer processing hard materials, it is necessary to periodically check and replace the grinding rollers, and be sure to remove the metal debris in the materials that will damage the rollers.

4. Another kind of vibration is caused by the high-pressure suspension shaft milling fan, which may be excessive powder accumulation on the blades, causing the blades to wear out, forming an unbalanced blade rotation, and causing abnormal vibrations. What we have to do is Remove the accumulated powder on the blade in time, and replace it in time if the blade wears.

5. When the equipment is used for a period of time, due to various internal vibrations or installation reasons, the anchor bolts may loose, causing abnormal vibration of the entire body. Therefore, pay attention to the tightness of the anchor bolts during routine maintenance. Loosen and tighten in time.

double-roller press

Second, the production of materials is abnormal

1. When the high-pressure roller mill is used for a long time, there will be no powder or less powder. One of the reasons for this situation is caused by the wear of the blade. Regular inspection and replacement can be used, and the lock may be locked. The powder device is not adjusted properly, and the seal is not tight, which causes the powder to suck back. This requires stopping in time, checking and adjusting the powder lock seal, and blocking the leak.

2. For materials, in addition to the abnormal situation of small output, the finished product may be too thick and too thin. This also has a certain relationship with the operation. It may be caused by incorrect adjustment of the fan air volume, or it may be due to the wear of the blade of the analyzer. Because it can’t achieve the effect of classification, this requires us to replace the blades in time, and adjust the size of the air volume according to the thickness of the material, and adjust the air volume too coarsely and the air volume too finely.

Briquetting Machine Structure

Third, the parts are abnormal

1. If the high-pressure roller mill is running, the pressure is too low and there is oil leakage from the oil cylinder, then it is most likely due to a problem with the hydraulic system of the machine. At this time, we need to timely repair the damaged zero. Replace the parts, and replace them with clean hydraulic oil, and then perform the corresponding debugging, so that the machine can be restored to normal use.

2. When the high-pressure roller mill is in operation, abnormal bearing temperatures may occur. This may be caused by a failure in the lubrication system. Therefore, it is necessary to deal with the oil inlet situation of each lubrication point in time and to the relevant components. Clean up to ensure the normal operation of the circulating cooling water circuit.

3. Another component that is prone to failure is the motor of the high-pressure roller mill. The phenomenon that occurs is that the current and temperature of the main machine of the high-pressure roller mill are increased, and the current of the fan is reduced. The reason may be that the feed is excessive and the air duct is powdered. The material is blocked and the exhaust is not smooth, which causes the circulating air flow to generate heat and cause failure. At this time, it is necessary to stop and clean up the powder accumulation in the air duct, and then reduce the feeding amount. At the same time, the Yu duct valve is opened to control the temperature of the material into the acceptable range.

In actual use, the common faults of the high-pressure roller mill are basically the above, which are mostly caused by improper operation. Therefore, it is necessary to operate in accordance with the regulations and also to do good maintenance. Corresponding solutions for different faults should not be dismantled and repaired selfishly, otherwise it may cause other undesired faults.

The roller skin of the mineral powder ball press is an important part of the pressing material. What kind of material is pressed and how the molding effect is directly related to it. The material of the roller skin of the general ball press can be divided into: ordinary steel, alloy material, cast steel and so on. After the running time is too long, it is unavoidable that the roller skin is worn, and it must be replaced with a new one after a certain degree. There is also a need to adjust the misalignment of the ball and socket after long-term use, otherwise it will directly affect the ball-making effect.

During the production process of the ore powder ball press, the fast rotation speed of the pressure roller can affect the pressure of the material, which is beneficial to the transmission of the force. In order to promote close contact between the materials, it can also overcome the stress occurring at the ball bowl interface, which can strengthen the ball pressing strength, but if the speed is too low, the ball press output will be greatly reduced.

It plays an important role for the rollers in the ore powder ball press. The fast rotation speed of the pressure rollers can affect the compression of the materials and is conducive to the transmission of force. In order to promote close contact between the materials, it can also overcome the stress occurring at the ball bowl interface, which can strengthen the ball pressing strength, but if the speed is too low, the ball press output will be greatly reduced.

During the pressing process, the distance between the two roller skins is a crucial element for pressing the ball. If the distance between the two rolls is small, it is not conducive to filling the entire mold with insufficient material, and the quality of the ball cannot reach the mark. If the distance between the two rolls is too large, the pressure cannot reach the sphere. In the middle, it has fallen off, affecting the strength of the ball. It can be seen that controlling the distance between the two rollers of the slag powder ball press is a key place to obtain an ideal pellet.

After the running time is too long, it is unavoidable that the roller skin is worn, and it must be replaced with a new one after a certain degree. There is also a need to adjust the misalignment of the ball and socket after long-term use, otherwise it will directly affect the effect of making ore powder balls.

The ore powder ball press has an influence on the roller distance and the forming of the material. When assembling the upper and lower rollers, special attention should be paid to adjusting the distance between the two. Generally, it is appropriate to control the distance between 2-3mm. In addition, when assembling the pressure rollers, special attention must be paid to the ball bowls on the upper and lower pressure rollers to be strictly aligned according to their rows and columns, so as not to cause misalignment and affect the strength of the briquettes. In addition, when the material is pressed by the mineral powder ball press, there are many factors that affect its forming.

The most important are two aspects: the nature of the material and the indicators of the ball press equipment. The material properties of the ball pressing machine are composed of raw material type, water content, and forming characteristics. This property also determines the size of the roller distance between the ball pressing machine. The distance between the pressure rollers is inversely proportional to the compression ratio. Although reducing the distance can increase the molding pressure, when the distance between the upper and lower pressure rollers is too small, it is difficult for the material to fill the ball bowl, which will affect the quality of the ball.

When the distance is too large, the forming pressure will have to be transmitted to the center of the ball in the future, and the formed ball will fall off. It will not even hit the ball.

Due to rain, snow, sand and temperature, frost, etc., these weather factors and natural phenomena are inevitable, so the high pressure ball press must be waterproofed when installed outdoors. It is necessary to fully consider various factors, try to think of all possible situations, and make the waterproof treatment more comprehensive and complete, so as to make greater use of the potential of the ball press and generate more benefits in the process of use.

In the case of rain and snow, water often penetrates into the interior of the high pressure ball press along the gap, causing damage. This is because for the suspension installation, there is a gap between the ball and the bracket, which creates rainwater injection. Condition, then how to solve this problem? Waterproof sealing measures should be taken during installation. It is also very important to prevent rainwater from entering the ball machine mounting bracket from the screw interface. It is recommended to use the original bracket. The original bracket fully considers the waterproof problem, such as the tilting design to make the ball machine rotate. The terminal is slightly higher. Even if the water in the bracket is filled, it will only flow back into the column without flowing into the ball.

Since rainwater may flow into the rack, the user should fully consider the waterproof factor when making the bracket. Why is there water droplets in the bracket? In general, the temperature during the day is high and the water vapor in the pole enters the bracket. When the night temperature drops, the water vapor condenses into water droplets that condense along the wall. When the bracket is not tilted or tilted in the opposite direction, water droplets will flow into the dome along the wall, causing damage. In order to reduce the entry of water vapor into the bracket, the joint between the bracket and the pole can be sealed with plasticine or silica gel.

In order to give full play to the role of the high pressure ball press, it must pay attention to its waterproof problem during installation. This is not only a tool to improve the efficiency of the user, but also to extend the service life of the device and provide more benefits and value to the user. This is a necessary step in the user’s use.

As a molding equipment, the ball press machine is very important in all industries, whether it is reprocessing of materials, or for convenient transportation, or direct molding, it plays a very important role. If you buy a ball press for the first time, we don’t know how to choose a variety of models, and we don’t know which one we need. The ball press manufacturer summarizes the classification of the ball press and learns together. Let’s have a look.

First, classification by pressure

In the manufacturing industry, the classification of ball presses is mainly related to pressure. In today’s market, ball presses can be basically divided into low pressure, medium pressure, high pressure, etc. In addition, our company has also developed and produced ultra high pressure. Ball machine for materials that require more pressure for forming.

1, experimental pressure ball machine

Smaller volume and lower energy consumption, different press roller pressure ratios can be adjusted according to different materials, ranging from 0-15t/cm. It is specially designed by our company for universities, laboratories, design units and factories and mines. The small experimental equipment manufactured is 1920*2100*1640 (unit mm) and is mainly used for small-scale simulation production.

2, medium pressure ball machine

Mainly relying on the material weight to enter the rolling zone to suppress the material with higher bulk density. According to different models, the line pressure ratio is between 2.5-3.0 (t/cm). The medium pressure ball press will change the structure of the traditional external gear transmission. In order to adopt the structure of the double-shaft reducer, the precision of the roller is effectively improved, and the gear of the reducer adopts a hard-toothed gear, which greatly improves the performance and service life of the reducer.

Briquetting Machine Structure

3, high pressure ball machine

Mainly used for pressing materials that are difficult to form. Compared with medium pressure, the line pressure ratio varies from 5-11 (t/cm) according to the model. The pre-press machine adopts speed-regulating motor, and all wear parts are welded. Wear-resistant alloy for improved performance and longevity, hydraulic standing, adjustable pressure and overpressure protection. Among today’s molding equipment, high pressure ball presses are widely used. Many of the types of ball presses mentioned below are actually one type of high pressure ball presses.

4, ultra high pressure ball machine

Designed for the production of finer particles (above 300 mesh) and lighter weight, the pressure of higher pressure is larger, the line pressure ratio is between 20-25t/cm, and the pre-presser is used to scrape the nozzle. The arc baffle is made of wear-resistant composite material, and the roller sleeve is composed of multiple contact seals, which greatly increases the sealing property of the triangular compression zone and effectively protects the roller sleeve from damage.

Second, pressing material classification

For the user, the pressure of the ball press is only a parameter, and the material to be pressed is the key factor for the classification of the ball press. The parameters required for different material forming are not the same, thus the various materials are separated. Various ball presses, such as dry powder, briquette, mineral powder, bauxite, etc.

1, dry powder ball machine

It is mainly used to suppress some moisture-free materials, such as quicklime powder, alumina powder, etc., water should not be added during the molding process, and the air between the materials is discharged and extruded into balls by high pressure, which is used in some metallurgical and chemical industries. .

2, mine powder ball machine

It is mainly used for the forming of some metallurgical wastes, as well as materials for re-returning the medicines, such as chrome ore powder, manganese ore powder and dust ash. For material sizes between 0 and 3 mm, the pressure requirements are within the scope of high pressure ball machines.

metal briquette machine

3, briquette pressure ball machine

It is suitable for pressing some materials which contain a certain amount of water, or need to add a certain amount of water or binder, and can also be subjected to anhydrous press forming. The molding process of the briquette ball press is divided into cold pressing and hot pressing, mainly in cold pressing forming, and the cold pressing determines whether to add the binder according to the bonding force between the materials. The briquette press is a medium and high pressure forming equipment. The configuration of different materials is slightly different, and customized production is required.

The above three ball presses have obvious requirements for the production process, while other ball presses require only a slight difference, but in general, there is no water, water and the binder to be added. Wait, some materials require the same material to be different in the molding process.

Third, the pressure roller diameter classification

1, small pressure ball machine

The diameter of the pressure roller is within 800mm. There are three models of the roller diameter of the small pressure ball machine produced by our company:

(1) Roller diameter 520mm ball press, under the roller diameter, the total pressure of the ball press is 100t, 150t.

(2) Roller diameter 650mm ball press, under the roller diameter, the total pressure of the ball press is 120t, 220t.

(3) Roller diameter 750mm ball press, under the roller diameter, the total pressure of the ball press is 150t, 200t, 300t.

Suitable for small and medium-sized enterprises in the processing of various materials, especially the powdery materials are not particularly small and medium-sized enterprises, the small overall size is small, the space requirements for the plant are not particularly harsh, the weight is light, if necessary, can be Move the adjustment device position during shutdown. However, the small ball press has a small roll surface, so the output is not particularly large. If it is a slightly larger medium-sized enterprise that has a large demand for production, it is more suitable for a medium-sized ball press.

Mineral powder ball machine

2, medium pressure ball machine

The pressure roller is between 800mm and 1200mm in diameter:

(1) Ball diameter 800mm ball press, the total pressure of the ball press is 380t.

(2) Roller ball with a diameter of 1000mm, the total pressure of the ball press is 300t, 350t, 500t, 540t, 800t.

(3) Roller ball with a diameter of 1200mm, the total pressure of the ball press is 300t, 800t and 1000t.

Compared with small-scale production and wider application range, both medium-sized enterprises and large enterprises can meet the production and molding pressure, and the roll surface is large enough and wide, and the output is high, but for the site. It requires a lot of space, and it may be necessary to install supporting facilities to help feed and dry.

3, large pressure ball machine

The pressure roller has a diameter of 1200mm or more. The Central Plains produces a ball press with a diameter of 1400mm. The total pressure is divided into 360t and 1000t. The body is larger and the output is higher. At the same time, it can meet some special molding needs, and is suitable for some large coal, mining and metallurgical industries.

The above is the classification of several common pressure ball machines. It can be seen that there are many types of such molding equipment, and there may be more than these. At the same time, for different pressure ball machine manufacturers, the classification of the pressure ball machines is not the same. However, when choosing, it is always inseparable from the size, output and use of the ball press.

The structure of the high-pressure roller mill is relatively complicated, the load is large, and there are many systems and components. In order to make better use of the device, it is necessary to understand its various components and nightly and necessary. The high-pressure roller mill is composed of a shafting system, a main frame, a feeding device, a transmission system, a hydraulic system, a lubrication system, a roller cover, and a detection system.

First, the spindle shaft system

The component consists of a grinding roller spindle with a certain thickness of wear-resistant material, a double row spherical roller bearing, a bearing seat, and inner and outer bearing end caps, a positioning ring, an end face thermal resistance, a water cooling system and the like.

The main shaft adopts split type and consists of two parts: the shaft body and the sleeve. The surface of the sleeve is welded with a wear layer. After the wear layer is worn, it can be repaired directly on the surface. If the sleeve is used, it cannot be repaired. To the extent that a new bushing can be replaced. The bearing support of the main shaft of the main shaft is a conical section, so that the disassembly of the main bearing can be carried out by means of an ultra-high pressure oil pump, which is convenient for inspection and replacement.

The main bearing of the high-pressure roller mill uses double row spherical roller bearings with self-aligning function. The bearing has the characteristics of large carrying capacity and long service life. It is concentrated with dry oil to ensure good lubrication.

The end face thermal resistance is used to detect the working temperature of the main bearing. It is closely attached to the outer ring of the main bearing to ensure continuous detection, alarm and control of the main bearing temperature. The water cooling system is used to reduce the operating temperature of the main shaft and the bearing, so that the shaft system can operate stably and continuously.

Second, the main frame

The main frame is the basis of the entire extrusion pulverization, and the crushing force is absorbed by it. In order to reduce the weight, all the welded structures are composed of upper and lower beams, left and right columns, bearing pins, positioning pins, guide rails and connecting bolts. See the main frame assembly schematic. The upper and lower beams and the left and right columns are integrally annealed after welding to eliminate the welding stress.

The upper and lower beams adopt the I-shaped structure and have greater rigidity and strength. The left and right columns and the structure of the I-shaped and box-shaped structures also have high rigidity, so that the entire frame can be connected into one. Rigid whole.

The load bearing pin mainly functions until the pulverizing force received on the column is transmitted to the upper and lower beams. Pay attention to the marking when installing.

The main role of the locating pin is to determine the center distance of the upper and lower beams on both sides.

The guide rails are provided as guides for the movable roller chocks. The rail widths on both sides are different, and the guide rails on the drive side should be wider.

Bolt sets are the key to ensuring the connection of the rack. Therefore, the high-strength bolts cannot be replaced by ordinary bolts, and the tightening torque should be controlled when tightening.

Third, the feeding device

The high-pressure roller mill feeding device is an important device to ensure that the material can enter the pressure zone uniformly and quantitatively, and the material is well squeezed. In operation, the material always fills the entire feed device and is directed into the pressure zone of the grinding roller. The feeding device is composed of a feeding port, a regulating inserting plate, a bracket, and a side plate pressing device. At the lower end of the side baffle, a hard alloy material of high hardness is provided in the portion of the pressure zone where the wear is severely punished. This reduces wear and improves the quality of the extruded material. The adjustment insert is used to control the thickness of the material cake to achieve the control of the treatment amount. It consists of a hand wheel, an adjusting screw and a card with welded material.

The side plate pressing device is used for controlling the gap between the side baffle and the end surface of the grinding roller. The device is composed of a bracket, a top screw, a butterfly spring and a spring seat.

The over-tightening screw can adjust the gap between the lower end of the side baffle and the end face of the grinding roller. Adjusting the pressure plate can adjust the top tension of the butterfly spring, so that the side baffle can ensure proper clearance with the end surface of the grinding roller during normal operation, and reduce the leakage of the end surface of the grinding roller.

Fourth, the main motor and transmission system

The main motor is the main power source for the entire high pressure roller mill. Two high-voltage three-phase asynchronous motors are used, which can be purchased by the user or commissioned by the manufacturer.

The transmission system adopts the internationally advanced planetary reducer suspension transmission. The output shaft of the planetary reducer is rigidly fixed to the grinding roller spindle by a shrink sleeve coupling. The gear unit is mounted on the basis of the grinding roller spindle and the gear unit can withstand the horizontal movement of the spindle. The output torque of the reducer is balanced by the torque support. The torque support includes a four-bar linkage and an elastic system. The torque support can satisfy the horizontal movement of the movable roller, and at the same time, it can play the role of load sharing, vibration absorption and buffering, and can reduce the processing and installation precision. All the hinge points in the four-bar linkage adopt the joint bearing with the sealing ring, which is highly adaptable. The elastic member in the elastic system employs a butterfly spring having a small axial dimension and a large coefficient of rigidity. In the working of the equipment, the top tension of the spring can be adjusted by adjusting the device to adapt the elastic system to the condition of the equipment load, and the universal joint drive shaft is used between the main motor and the planetary reducer. Since the universal joint drive shaft is disposed at the high speed end, the torque required to transmit itself is relatively small, and the rotational speed is high. And the cross-shaft universal joint drive shaft has the characteristics of high transmission efficiency, large transmission torque, balanced transmission, good lubrication conditions and large node inclination.

The shrink sleeve coupling used in the transmission system is a non-standard accessory, which consists of a conical sleeve, two shrink discs, a high-strength bolt set and a dust seal. The working principle is: tightening the high-strength bolt, so that the conical sleeve presses the hollow shaft of the reducer, and elastically deforms it, and is hung on the journal shaft of the grinding roller, and uses the friction generated by the positive pressure therebetween. It functions to transmit torque and reducer positioning.

Five, hydraulic system

The hydraulic system is designed to provide the required crushing force for the grinding rolls. Its main function is the hydraulic springs, which also have hydraulic protection. Its performance directly affects the quality of the crushed material and the safety of the equipment.

The system consists of three parts: pump station, valve table and cylinder (see hydraulic system diagram). The valve table, pump station and cylinder are mounted directly on the frame and are compact.

The pump station provides a hydraulic oil pump, which is mainly composed of an oil pump, an oil pump motor relief valve, a pressure gauge and an oil filter.

The oil filter of the pumping station is arranged in series with the pressurized main oil circuit, so that the hydraulic oil is filtered by the oil filter and then enters the main oil circuit to avoid blockage of system components caused by impurities entering the main oil circuit, and the system pressure can be based on The operation requires stepless adjustment. The pressure required to control the system can be adjusted steplessly. A pressure differential device is attached to the oil filter. When the filter cartridge is clogged and the pressure difference between the two sides reaches a certain value, an alarm signal is issued to clean or replace the filter cartridge by the operator. The valve table section is the main oil circuit and control oil circuit of the hydraulic system, and is composed of two capacity accumulators and an electromagnetic overflow valve. During operation, the four main cylinders are connected to the two accumulators through large diameter pipes so that the pressure between them is always the same and the dynamic characteristics of the cylinders are sensitive. The pilot-operated relief valve mainly protects the hydraulic system. It has the characteristics of dynamic response and large flow. Once the roller enters the foreign object and the system pressure increases, it can open the pressure relief in time to protect the host equipment. The relief valve can be hydraulically controlled and electronically controlled.

When commissioning and handling accidents, you can press the push button to relieve pressure or high speed pressure. A pressure sensor and an electric contact pressure gauge are additionally provided on the valve table. The hydraulic system pressure signal main control room and control cabinet can be interlocked with the main unit through the pressure sensor, which is also convenient for the operator to observe the operation. The electric contact pressure gauge is mainly used to control the upper and lower limits of the hydraulic system pressure. Control the opening and closing of the pump pump motor.

The four cylinders act directly on the movable roller bearing housing to provide the appropriate crushing force for the grinding roller. The cylinder force can be applied to the single-side bearing seat or the double-side bearing seat by the displacement of the oil circuit control system. When the grinding roller is moved, the horizontal displacement of the two bearing seats is detected and controlled by the displacement sensor. The cylinder consists of a cylinder, a piston, an end cap, a wear ring and a sealing ring. See the schematic diagram of the cylinder assembly. The cylinder is a double-acting cylinder, so that once the black system of the equipment fails. The movable roller can be pulled back in time with the cylinder to increase the nip and eliminate the malfunction. At the end face of the cylinder rod of the cylinder, a toroidal head is provided to prevent the radial load from being added to the cylinder when the axis of the moving roller is deflected.

Sixth, lubrication system

The lubrication system is used for the lubrication of the main bearing, the sealing and the lubrication of the movable roller bearing housing. The lubrication system can adapt to the dusty working environment and ensure the lubrication of the main bearing and the movable roller bearing housing under good lubrication conditions. It is mainly composed of a oil storage cylinder, a pump component with a flange connected, and a geared motor. Grease can be manually or electrically filled with a pump and added to the oil cylinder through a hose to prevent the grease from being exposed to dust and contaminating the grease. A pressure limiting valve and a fuse are provided in the lubrication pump to adjust the maximum pressure of the lubrication system. When the pressure in the system is exceeded for some reason, the rupture plate breaks and the grease overflows. A filter screen is provided on the lubrication pump to filter grease to prevent debris from entering the system and to ensure normal operation of the system. The grease from the lubrication pump is proportionally distributed to each lubrication point by the progressive distributor. There are two oil separators in the system, one on each side of the main frame.

This type of oil separator is a relatively advanced oil separator. It is characterized in that any one of the divided roads is blocked, and the whole system stops working. This avoids the Achilles heel that one or more lubrication points are broken and the operator cannot detect in time. A proximity switch is placed on the oil separator to signal the operator as soon as the oil separator stops working.

Seven, detection system

The detection system is distributed among the various systems as the detection control signals. The signals detected by the detection elements enable interlocking, indication and alarm between the systems. Realize automatic control of the device.

1. The nip detection between the two grinding rolls adopts two inductive displacement sensors, which are respectively arranged on the two bearing seats of the movable roller. Through the sensor, the nip of the two grinding rolls can be reflected at any time, that is, the material cake is reflected. thickness. When the two bearing seats move unevenly, the deviation can also be reflected. When one of the two bearing housings or the two-shaft bearing housing retreats to the set maximum displacement, an alarm is issued, and the main motor is locked in parallel to ensure the safety of the equipment.

2, the main bearing temperature detection end face platinum thermal resistance. Each bearing is tested separately. The end face thermal resistance is attached to the outer ring of the bearing to detect and reflect the working test of the main bearing at any time. When the operating temperature reaches the set maximum value, an alarm is issued to notify the operator.

3. Pressure sensor is used for pressure detection of hydraulic system. The sensor detects the signal and transmits it to the host control cabinet. When the system pressure exceeds the set maximum system pressure, an alarm is issued and the main drive motor is stopped.

4. Lubrication system work detection uses proximity switch. The proximity switch is installed on the system oil separator. When the oil separator is working normally, the proximity switch is instructed once every other time. When a certain oil circuit is blocked, the proximity switch does not operate at all times. However, it must be noted that the premise of the oil separator or the proximity switch must be based on the normal operation of the lubricating oil pump motor and the unbroken grease in the oil reservoir.

5, the pressure difference alarm of the oil filter, using the differential pressure device. When the oil filter is used for a period of time, the impurities under filtration may block the filter cartridge, causing the pressure difference between the oil passages on both sides of the oil filter to increase. When it is increased to a certain value, the sound and light alarm signal is emitted from the main control cabinet. It is worth noting that the signal is only sent when the oil filter is working.

Eight, roller cover

The main function of the roller cover: one is to prevent accidental casualties and equipment damage accidents; the other is to seal and reduce dust. Observation and repair door holes are provided on both roller covers to check the wear of the roller surface at any time while the equipment is running.

The impact crusher, also known as counter-breaking, is a kind of crushing machine that uses impact energy to crush materials. It can process materials with a side length of 100-500 mm and a compressive strength of up to 350 MPa. It has the advantages of large crushing ratio and cubic particles after crushing. Widely used in building materials, ore crushing, railways, highways, energy, transportation, energy, cement, mining, chemical and other industries for medium and fine crushed materials, its discharge size can be adjusted, and the crushing specifications are diversified.

Any machine that is used for a long time or when it is used improperly will cause abnormal use. What are the common faults and solutions when using the impact crusher?

Common faults and solutions for impact crushers:

1. Counter-breaking start device does not turn

Check if the material in front of the feeder falls into the crushing chamber due to the vibration of the stop, causing the material to catch the rotor. It is necessary to clean the materials in the crushing chamber and restart it after starting up again.

2. Counterattack broken bearing fever

The bearing should be inspected for good lubrication. Under normal conditions, the lubricant should be filled with 50% of the housing volume. In other cases, the lubricant is degraded and viscous. The bearing needs to be cleaned and replaced with a new one. If the bearing oil is too much or too little, the bearing will heat up. When refueling, it is necessary to check the oil level. If the bearing is damaged, the bearing should be replaced in time. The upper cover is too tight. It is advisable to adjust the bolt tightness.

3. Equipment vibration is abnormal

If there is a vibration abnormality, the operator should stop immediately, we need to check the following.

(1) Check whether the inside contains metal impurities or parts are broken, and clean the crusher cavity;

(2) Check the tightening of the inner liner and the gap between the hammer and the liner. If the gap is too small, it will cause abnormal noise;

(3) It may be that the feed size is too large;

(4) Wear parts are unevenly worn, and the counter hammer needs to be replaced;

(5) The rotor is unbalanced and needs to be adjusted to verify the balance;

(6) Check that the equipment anchor bolts are tight and properly reinforced.

4. Counterattack broken belt flip

Mainly due to the broken belt, the need to replace the V-belt, pay attention to ensure the quality of the belt; or because of the improper assembly of the pulley, the active and driven pulleys should be adjusted on the same plane.

5. The machine bearing is bent or broken

The main reason is that the main engine is overloaded for a long time, the heat treatment of the bearing is improper, and the hardness of the broken material exceeds the standard. When handling, it is necessary to replace the new bearing, and pay attention to timely maintenance and repair during the future operation.

6. The discharge granularity is too large

Explain that the counter-shock crusher hammer or counter-attack lining is seriously worn, causing the gap between the hammer and the counter-attack plate to be too large, adjusting the back-and-forth impact frame clearance, or replacing the lining plate and the plate hammer; adjusting the position of the counter-attack frame so that the sides and the machine The gap between the lining plates is even; if the lining on the frame is seriously worn, it should be replaced in time.

7. The impact crusher appears boring car

The counter-shock is suddenly stopped during operation, which causes many reasons, such as blockage of the discharge port, slippage of the belt, low voltage, and bearing damage. These problems should be eliminated, such as removing the blockage of the discharge port, tightening the belt, increasing the voltage and ensuring the stability of the voltage, and replacing the bearing.

8. The device spring parts break

The main reason for this failure is that the spring is not relaxed when the discharge opening is adjusted. Therefore, the broken spring must be replaced during processing.

9. Abnormal noise inside the broken chamber

Should stop immediately, check whether the inside of the crushing chamber contains metal impurities or parts break, and clean the crusher cavity; check the internal lining fastening and the gap between the hammer and the lining, too small clearance will cause abnormal noise .

10. There is glue smell in the operation of the equipment

The main cause of this problem is that the belt slips, the friction with the pulley produces a pungent rubber smell, or the rotor is stuck. It is necessary to check the rotor in the machine cavity and solve it in time.

The above is the fault and solution that is easy to occur in the use of the impact crusher. If this happens during later use, you can refer to the simple check. When we choose the impact crusher, we must choose the quality clearance, the regular manufacturer. Avoid problems that often occur later, or without quality assurance.

Counter-crusher, also known as counter-attack, is mainly used for metallurgical, chemical, building materials, hydropower and other materials that need to be relocated, especially for the operation of mobile materials such as highways, railways, hydropower projects, etc. The types, sizes and finished material requirements vary in a variety of configurations.

The impact crusher can process materials with a side length of 100-500 mm and a compressive strength of up to 350 MPa. It has a large crushing ratio and a cubic particle after crushing. Widely used in building materials, ore crushing, railways, highways, energy, transportation, energy, cement, mining, chemical and other industries for medium and fine materials. The size of the discharge material can be adjusted, and the crushing specifications are diversified.

The impact crusher is named according to the working principle, that is, the material is crushed by the principle of counter crushing. It is a crusher equipment which is more fine than the jaw crusher. It is mainly used for fine crushing operations in the stone production line. The crusher cooperates to break. The impact crusher has the following five advantages in the process of crushing.

Impact crusher performance

First, the impact crusher is more effective in dealing with materials with large moisture content, effectively preventing material blockage. When the moisture content of the treated material is too large, the feed chute and the counterplate of the impact crusher may be equipped with a heating device to prevent the material from sticking. The impact crusher does not need to be equipped with a bottom sieve plate to prevent clogging.

Second, the impact crusher is suitable for a wider range of materials. The hammer of the impact crusher is fixed to the rotor by a mechanical clamping structure, and has a large moment of inertia when it rotates with the rotor. Compared with the hammer crusher (the hammer is in a suspended state), the rotor of the impact crusher has greater momentum, adapts to crushing harder materials, and has lower energy consumption.

Third, it can be convenient and flexible to adjust the particle size of the discharge, and the adjustment range is wide. The impact crusher can adjust the discharge granularity in various ways, such as adjusting the rotor speed, adjusting the backlash plate and the gap of the grinding cavity. The gap adjustment can be adjusted mechanically or hydraulically, and the hydraulic adjustment system facilitates the adjustment of the gap through the local operation button or the travel control system.

Fourth, the wearing parts of the wearing parts are small, the metal utilization rate is high, and the wear of the counter-attack type stone-breaking machine hammer is only present on the one side facing the material. When the rotor speed is normal, the feed will fall to the surface of the hammer (the striking surface), and the back and sides of the hammer will not be worn. Even the wear on the side of the material is scarce. And the bottom grinding rod is also easy to replace. The metal utilization rate of the impact crusher plate hammer can be as high as 45% – 48%.

5. The spare parts of the impact crusher are easy to replace and the maintenance cost is reduced accordingly. Only 6 hammers are installed on the rotor of the impact crusher. The special tools can be used to easily replace the hammers. The time of a shift.

Why choose a impact crusher

(1) The particle size is uniform, the discharge is cubic, and the fine powder and dust content are low.

(2) Low operating costs and low investment costs. The total weight of the impact crusher is lighter than that of the hammer crusher, the shape is small, and the dynamic and static load values ​​are low, which can effectively reduce the cost of civil works. At the same time, the required motor power is low, which can effectively reduce the power consumption of the device and reduce the operating cost of the device.

(3) The impact crusher has long running time, and the consumable parts are durable and reliable.

First, it can handle materials with high moisture content to prevent clogging.

When the impact crusher is in operation, it can handle materials with a large moisture content, and can prevent the material from being blocked during the dust removal process. When the material with relatively large water content passes through the impact crusher, the feeding tank and the counterattack plate of the counterattack plate can be equipped with a heating device, the main function is to prevent the adhesion of the material and the counterattack plate, and the counterattack is not required to be equipped with the bottom sieve plate. Can effectively block the blockage of materials.

Second, the material is widely adaptable.

The impact crusher has a variety of applications, which can crush hard materials or break soft materials. The hammer of the counter crusher is firmly fixed to the rotor by a mechanical clamping structure, and has a large moment of inertia when the rotor rotates. The counter-attack crusher rotor has more power to accommodate the crushing of harder materials while consuming less energy.

Third, the size of the discharge granularity is varied

The output size of the impact crusher is flexible and adjustable, and the range is relatively wide. The counter crusher can adjust the discharge particle size by adjusting the rotor speed and adjusting the gap between the counter plate and the crushing chamber. The gap adjustment can be mechanical or hydraulic, and the hydraulic adjustment system can easily adjust the gap through the on-site operation button or distance control system.

Fourth, vulnerable parts wear less

The impact crusher of the impact crusher has less wear and tear, and the utilization rate of the metal wearing parts is high. The wear of the counter-offer breaker hammer appears only on one side of the panel material. When the rotor speed is normal, the feed will fall on the surface of the hammer (the striking surface), and the back and sides of the steel hammer will not wear. Even on the side of the material, there is little wear. The bottom grinding rod is easy to replace. The metal utilization rate of the counter-attack crusher plate hammer can reach 45%≤48%. The hammerhead of the hammer crusher is suspended and the wear occurs on the top, front, back and sides. Compared with the hammer, the hammer wear is more serious, and the metal utilization rate is only about 25%. The rotor itself may wear out.

Fifth, the replacement of spare parts is simple and the maintenance cost is low

The replacement of the spare parts of the impact crusher is simple and the maintenance cost is reduced accordingly. Only a few hammers are installed on the rotor of the impact crusher (the equipment of different manufacturers may have different number of hammers). It is convenient to replace the hammer with a special tool, and only one shift is required to replace the set of hammers. The replacement of the bottom grinding chamber grinding rod can only take a few + minutes, which greatly reduces the time and cost of inspection and maintenance.