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Use and maintenance of the motor

Categories:Industry News
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Time of issue:2020-08-13
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(Summary description)
The use and maintenance of motors are often ignored by people. Whether a motor can maximize economic benefits and prolong its service life is a key issue.

(1) Starting: Before starting the motor, the mechanical inspection should be carried out first, such as checking whether the rotating shaft is flexible; the bearings should be properly lubricated; the fan and the hood should not collide, and the motor base should be fixed. Then it must be checked in terms of circuit, plus check whether the leads of the motor are connected correctly. Some motors have only two wires in the outlet box, which are easy to connect, and some have four wires. At this time, the connection method must be carried out according to the relevant manual, otherwise the motor will be burned out. The wire must be firmly connected; it is best to install a fuse in front of the motor socket, and the ampere rating of the fuse should be about 10-25% higher than that of the motor.

Before the motor is running, it is best to carry out a no-load test run without a load to check whether the rotation is normal and whether the steering meets the requirements. Steering of single-phase motors. The manufacturer has already connected the winding, and it is not easy to change it at will.

When the motor starts, it can be started in 3 to 5 seconds. If the motor fails to rotate or reaches 70 to 80% of the rated speed after this time, the power supply should be cut off quickly, and the cause of the fault should be checked. winding. This situation may be that the load is too large; the voltage is low. The centrifugal switch does not operate, the motor winding has problems, etc.

(2) Operation: When the motor runs normally with a load, the speed is uniform, the sound is moderate, and the heat is appropriate. However, you should always pay attention to the temperature rise of the motor. If you find serious fever and other bad symptoms, you must pull the brake to stop the operation. Most of the situation occurs in rural areas due to the reduction of power grid voltage. Although this heat will not burn the windings for a while, it will reduce the service life of the motor. It is necessary to ensure that the motor is moisture-proof and well ventilated, and the outlet box and capacitors must not enter the water, and there must be no mechanical damage. The air shelter of the hood should not be blocked, and the motor casing should be well grounded. When the capacitor is damaged and updated, the voltage value of the new capacitor should not be lower than the voltage value of the old capacitor, and it is best to do the same.

(3) Maintenance: The motor can be disassembled for maintenance after running for a long time. Clean up the internal debris and dust, add lubricating oil (use calcium-sodium-based No. 1 grease), etc.; it is best to measure the winding insulation resistance with a 500-volt level shaker, and the normal should not be less than 0.5 megohm.

When disassembling and assembling, pay attention to: ①The internal wiring of the winding and the welding point of the centrifugal switch must not be mistaken or disconnected; ②It is not allowed to break the insulation of the winding, protect the action gap of the centrifugal switch, and ensure that its contacts operate normally and their contacts When there is spark burn, it can be lightly polished with a fine rag. ③Aluminum shell motors should be careful to avoid heavy blows, protect the end face of the motor, and do not damage the heat dissipation ribs on the chassis and end caps to maintain good heat dissipation conditions. The fan blades must not be bent or broken, and the bearings and rotating shafts must not have mechanical damage. When storing the motor, it should be placed in a ventilated and dry place.

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Use and maintenance of the motor

Categories:Industry News
Author:
Origin:
Time of issue:2020-08-13
Views:0

Information

The use and maintenance of motors are often ignored by people. Whether a motor can maximize economic benefits and prolong its service life is a key issue.

(1) Starting: Before starting the motor, the mechanical inspection should be carried out first, such as checking whether the rotating shaft is flexible; the bearings should be properly lubricated; the fan and the hood should not collide, and the motor base should be fixed. Then it must be checked in terms of circuit, plus check whether the leads of the motor are connected correctly. Some motors have only two wires in the outlet box, which are easy to connect, and some have four wires. At this time, the connection method must be carried out according to the relevant manual, otherwise the motor will be burned out. The wire must be firmly connected; it is best to install a fuse in front of the motor socket, and the ampere rating of the fuse should be about 10-25% higher than that of the motor.

Before the motor is running, it is best to carry out a no-load test run without a load to check whether the rotation is normal and whether the steering meets the requirements. Steering of single-phase motors. The manufacturer has already connected the winding, and it is not easy to change it at will.

When the motor starts, it can be started in 3 to 5 seconds. If the motor fails to rotate or reaches 70 to 80% of the rated speed after this time, the power supply should be cut off quickly, and the cause of the fault should be checked. winding. This situation may be that the load is too large; the voltage is low. The centrifugal switch does not operate, the motor winding has problems, etc.

(2) Operation: When the motor runs normally with a load, the speed is uniform, the sound is moderate, and the heat is appropriate. However, you should always pay attention to the temperature rise of the motor. If you find serious fever and other bad symptoms, you must pull the brake to stop the operation. Most of the situation occurs in rural areas due to the reduction of power grid voltage. Although this heat will not burn the windings for a while, it will reduce the service life of the motor. It is necessary to ensure that the motor is moisture-proof and well ventilated, and the outlet box and capacitors must not enter the water, and there must be no mechanical damage. The air shelter of the hood should not be blocked, and the motor casing should be well grounded. When the capacitor is damaged and updated, the voltage value of the new capacitor should not be lower than the voltage value of the old capacitor, and it is best to do the same.

(3) Maintenance: The motor can be disassembled for maintenance after running for a long time. Clean up the internal debris and dust, add lubricating oil (use calcium-sodium-based No. 1 grease), etc.; it is best to measure the winding insulation resistance with a 500-volt level shaker, and the normal should not be less than 0.5 megohm.

When disassembling and assembling, pay attention to: ①The internal wiring of the winding and the welding point of the centrifugal switch must not be mistaken or disconnected; ②It is not allowed to break the insulation of the winding, protect the action gap of the centrifugal switch, and ensure that its contacts operate normally and their contacts When there is spark burn, it can be lightly polished with a fine rag. ③Aluminum shell motors should be careful to avoid heavy blows, protect the end face of the motor, and do not damage the heat dissipation ribs on the chassis and end caps to maintain good heat dissipation conditions. The fan blades must not be bent or broken, and the bearings and rotating shafts must not have mechanical damage. When storing the motor, it should be placed in a ventilated and dry place.

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