A pulverizer is a machine that can use external force to deform a material and split it into finer particles. At present, the pulverizer has been widely used in various industries. In view of the fact that the pulverizer is the basic processing technology in the production and application of traditional Chinese medicine, ultrafine pulverization has attracted more and more people's attention. Although it started late, the developed varieties are relatively few, but it has revealed its unique advantages and broad application. prospect. Since the working principle of the pulverizer is different, the development of the pulverizer has also shown diversified development. The increase of the types will inevitably lead to the emergence of various problems. Below I will compare the principles of several pulverizers that are more common on the market. A brief introduction to how to solve the problem and daily maintenance and repairs!
There are many pulverizers on the market. It can cut the feed vines, high stalks, and smash red sorghum and corn. It is a common machine in rural areas. With the extension of the use time, the following faults often occur: the work is weak when crushing; it does not start; it is not energized. Under normal circumstances, you can repair it yourself.
First check the power socket, plug, power cord for aerobic fall-off, breakage, if not, you can plug in the power test machine, when the motor is energized and does not rotate, when you turn the wheel and turn it by hand, you can conclude that One of the two starting capacitors of the machine has a capacity failure. In this case, only new products are generally exchanged. In another case, the power is not rotated, and an external force can be applied to rotate but a weak current is emitted in the motor, which is caused by a slight leakage of the starting capacitor. If the current is too loud, the motor will not start at all, and it is determined that the starting capacitor is short-circuited (the motor coil is short-circuited and needs professional repair). In the absence of professional equipment, the capacitor (4UF/400V) can be removed first, and the two leads are respectively inserted into the zero and fire line jacks of the mains to charge the capacitor, and then the two leads are short-circuited and discharged. If the discharge spark can be emitted at this time and there is a loud "beep" sound, the capacitor can be used; if the spark and the sound are weak, the capacity of the capacitor has dropped, and it is necessary to replace it or add a small capacitor. This method cannot be used if the capacitor has been damaged and short-circuited, and must be replaced with a new product of the same specification. There is another type of small high-speed pulverizer. The quality of this pulverizer is generally not easy to damage, and daily maintenance is more important. The following is the maintenance focus of this type of pulverizer. Check that the lubrication of the bearing is good. Check that all fasteners are tight. Check that the drive belt is installed correctly and in good condition. If the belt is damaged, it should be replaced in time. When there is oil on the belt or the sheave, clean it with a clean rag. Check if the guard is good. If the guard is found to be unsafe, it should be removed in time. Check for any material or other debris in the damaged cavity. If it should be cleaned at times. Check if the hydraulic overhead machine head or the top threaded rod is retracted and adjust the gasket to be installed correctly and tightly.
The pulverizer is a kind of agricultural machinery which is more commonly used. The fan on the pulverizer is in the working process. Because the rotation speed is very high, the working environment is bad, the sealing is not strict, the sand causes serious wear on the wind opportunity, and the impeller body and the hub rivet The head falls off and fatigue cracks appear at the rivet holes. How to repair the fan has become a thorny problem. The slightest maintenance method can not only achieve the purpose of repair, but also make the fan completely scrapped. This article describes a simple and practical maintenance method for reference.
The fan is tested by dynamic balance. Because of its high speed, it has a high balance requirement. Especially the impeller of the fan is very sensitive to the imbalance of the periphery, but the slight imbalance of the heart is not required. Very high. According to this feature, the failure of the impeller can be repaired by the following methods:
1. If the rivet head of the impeller is worn, it can be welded by welding the impeller body and the hub to return the worn rivet head to its original normal state.
2. In the case where the fatigue crack is likely to occur at the rivet hole, the new welding rod which has not been used may be used for welding and repairing the crack, but the symmetry of the axial center of the impeller is performed, and the remaining welding rod of the crack is left in the crack. At the same place, a new electrode is used to repair the rivet hole crack. The remaining electrode after welding is as long as the remaining electrode when the symmetrical rivet is repaired to ensure that the weight of the weld is equal. If there is no crack at the symmetrical rivet hole, the electrode should be welded here to offset the newly added welding weight at the symmetry rivet hole crack. According to this method of symmetrical compensation, the crack can be repaired by welding.
3. A simple dynamic balance test of the impeller is also very simple. After the impeller is lifted up, move it by hand to make it gently rotate. If it is not balanced, it will stop at the low point of zui and swing left and right. If there is a bias, you can spot weld on the opposite impeller, increase the weight to balance, or use the angle grinder to grind away the weld marks of the heavy impeller, so that the balance can be achieved, so that the fan can be repaired and normal work. Note that in the repair process of the fan, it is not possible to use spot welding for spot welding, and leave the weld mark on the impeller so as not to affect the balance of the fan impeller, and the purpose of repair cannot be achieved, resulting in greater loss.
There are many pulverizers on the market. It can cut the feed vines, high stalks, and smash red sorghum and corn. It is a common machine in rural areas. With the extension of the use time, the following faults often occur: the work is weak when crushing; it does not start; it is not energized. Under normal circumstances, you can repair it yourself.
First check the power socket, plug, power cord for aerobic fall-off, breakage, if not, you can plug in the power test machine, when the motor is energized and does not rotate, when you turn the wheel and turn it by hand, you can conclude that One of the two starting capacitors of the machine has a capacity failure. In this case, only new products are generally exchanged. In another case, the power is not rotated, and an external force can be applied to rotate but a weak current is emitted in the motor, which is caused by a slight leakage of the starting capacitor. If the current is too loud, the motor will not start at all, and it is determined that the starting capacitor is short-circuited (the motor coil is short-circuited and needs professional repair). In the absence of professional equipment, the capacitor (4UF/400V) can be removed first, and the two leads are respectively inserted into the zero and fire line jacks of the mains to charge the capacitor, and then the two leads are short-circuited and discharged. If the discharge spark can be emitted at this time and there is a loud "beep" sound, the capacitor can be used; if the spark and the sound are weak, the capacity of the capacitor has dropped, and it is necessary to replace it or add a small capacitor. This method cannot be used if the capacitor has been damaged and short-circuited, and must be replaced with a new product of the same specification. There is another type of small high-speed pulverizer. The quality of this pulverizer is generally not easy to damage, and daily maintenance is more important. The following is the maintenance focus of this type of pulverizer. Check that the lubrication of the bearing is good. Check that all fasteners are tight. Check that the drive belt is installed correctly and in good condition. If the belt is damaged, it should be replaced in time. When there is oil on the belt or the sheave, clean it with a clean rag. Check if the guard is good. If the guard is found to be unsafe, it should be removed in time. Check for any material or other debris in the damaged cavity. If it should be cleaned at times. Check if the hydraulic overhead machine head or the top threaded rod is retracted and adjust the gasket to be installed correctly and tightly.
The pulverizer is a kind of agricultural machinery which is more commonly used. The fan on the pulverizer is in the working process. Because the rotation speed is very high, the working environment is bad, the sealing is not strict, the sand causes serious wear on the wind opportunity, and the impeller body and the hub rivet The head falls off and fatigue cracks appear at the rivet holes. How to repair the fan has become a thorny problem. The slightest maintenance method can not only achieve the purpose of repair, but also make the fan completely scrapped. This article describes a simple and practical maintenance method for reference.
The fan is tested by dynamic balance. Because of its high speed, it has a high balance requirement. Especially the impeller of the fan is very sensitive to the imbalance of the periphery, but the slight imbalance of the heart is not required. Very high. According to this feature, the failure of the impeller can be repaired by the following methods:
1. If the rivet head of the impeller is worn, it can be welded by welding the impeller body and the hub to return the worn rivet head to its original normal state.
2. In the case where the fatigue crack is likely to occur at the rivet hole, the new welding rod which has not been used may be used for welding and repairing the crack, but the symmetry of the axial center of the impeller is performed, and the remaining welding rod of the crack is left in the crack. At the same place, a new electrode is used to repair the rivet hole crack. The remaining electrode after welding is as long as the remaining electrode when the symmetrical rivet is repaired to ensure that the weight of the weld is equal. If there is no crack at the symmetrical rivet hole, the electrode should be welded here to offset the newly added welding weight at the symmetry rivet hole crack. According to this method of symmetrical compensation, the crack can be repaired by welding.
3. A simple dynamic balance test of the impeller is also very simple. After the impeller is lifted up, move it by hand to make it gently rotate. If it is not balanced, it will stop at the low point of zui and swing left and right. If there is a bias, you can spot weld on the opposite impeller, increase the weight to balance, or use the angle grinder to grind away the weld marks of the heavy impeller, so that the balance can be achieved, so that the fan can be repaired and normal work. Note that in the repair process of the fan, it is not possible to use spot welding for spot welding, and leave the weld mark on the impeller so as not to affect the balance of the fan impeller, and the purpose of repair cannot be achieved, resulting in greater loss.
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