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Motor maintenance and maintenance

author:xiaoE date:2020-01-01 13: 09
Motor maintenance and maintenance
Professional motor maintenance center motor maintenance process: cleaning the stator and rotor-replacing carbon brushes or other parts-vacuum F-level pressure dipping paint-drying-adjusting dynamic balance.
1. The operating environment should always be kept dry, the surface of the motor should be kept clean, and the air inlet should not be obstructed by dust, fibers, etc.
2. When the thermal protection of the motor continues to operate, it should be ascertained whether the fault comes from the motor or the overload or the setting value of the protection device is too low. After the fault is eliminated, it can be put into operation.
3. Ensure that the motor is well lubricated during operation.The general motor runs for about 5000 hours, that is, it should be supplemented or replaced
Grease, when the bearing is overheated or the lubrication is deteriorated during operation, the hydraulic pressure should change the grease in time.The three-phase asynchronous motor cage rotor asynchronous motor has simple structure, reliable operation, light weight and low price, and has been widely used. Its main disadvantage is that it is difficult to adjust the speed.The rotor and stator of the wound three-phase asynchronous motor are also provided with three-phase windings and connected to an external varistor through slip rings and brushes.Adjusting the resistance of the rheostat can improve the starting performance of the motor and adjust the speed of the motor.When replacing the grease, remove the old lubricating oil, and clean the oil grooves of the bearing and bearing cover with gasoline, and then fill 3/1 of the cavity between the inner and outer rings of the bearing with ZL-2 lithium-based grease (for 2 poles) And 2/3 (for 4, 6, and 8 poles).
4. When the life of the bearing is over, the vibration and noise of the motor will increase significantly. When the radial clearance of the bearing reaches the following value, the bearing should be replaced.The single-layer windings of three-phase asynchronous motors can be divided into chain windings, cross-chain windings, concentric windings and cross-concentric windings according to their coil shape and terminal arrangement.National standard motor.
5. When disassembling the motor, the rotor can be taken out from the shaft extension end or the non-extended end.If it is not necessary to remove the fan, it is more convenient to take out the rotor from the non-shaft extension end. When pulling out the rotor from the stator, prevent damage to the stator winding or insulation.
6. When replacing the winding, you must write down the form, size, number of turns, wire gauge, etc. of the original winding. When you lose these data, you should ask the manufacturer to change the original design winding at will, which often results in one or several performances of the motor. Deteriorating, even unusable.National standard motor.
Daily guide for water pump maintenance
1. Daily maintenance and maintenance of water pump: daily maintenance.
Check the power cord of the water pump for aging, broken skin, and leakage of the copper core of the power cord. In this case, if the power cord is on the shore, it can be wrapped
Just wrap it. If it is in the water, it is best to replace the power cord. Always check whether the pump impeller has dirt, foreign matter, etc. blocking the water impeller or the water outlet, and check whether the sound is good when the pump is running. If there is a clattering sound, it means the pump The bearing is damaged and needs to be repaired, refueled, and replaced. Check whether the water pump is running or not leaking. If there is a leak, please send it to the water pump maintenance department for repair.National standard motor.
2. How to deal with the abnormal noise of the pump: There are three reasons for the abnormal noise.
XNUMX. The water pump bearing is damaged and needs to be replaced.
XNUMX. The impeller of the water pump is loose and is worn to the bottom end cover of the water pump.
XNUMX. Damage to the water pump coil
3. The water pump cannot supply water normally after starting: there are four reasons why the pump cannot supply water normally
XNUMX. Is the water pump a centrifugal pump? Is it necessary to divert water?
XNUMX. Whether the pump is reversed, if it is reversed, replace the capacitor joint method.
XNUMX. Whether there is any foreign matter in the water outlet of the pump or the gap of the impeller.
XNUMX. Whether the water pump seal is installed properly.
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