Three-phase asynchronous motors are widely used in industrial production as power supply equipment. The normal operation of the motor often determines the production schedule of the factory. The motor manufacturer reminds that in order to avoid the sudden failure of the motor operation, the company will regularly check The overhaul of the motor is particularly important.

　　The following is the maintenance method of three-phase asynchronous motor compiled by Hubei Wanbang motor manufacturer:

　　One, minor repair

　　Check the motor without removing the end cover, and perform external cleaning; check whether the lead head is overheated, and tighten the connecting screws; check whether the bearing lubricating oil is discolored or lacking oil; measure the motor insulation resistance and absorption ratio; check the shell grounding wire; check the ventilation The condition of the system; check the degree of wear of the axial current collector ring, the wound rotor collector ring and the brush, check the brush holder spring, the collector ring to lift the short-circuit device and clean the dust.

　　XNUMX. Intermediate repair

　　Including minor repairs; disassembling the motor and extracting the rotor; before and after disassembly, measuring the insulation resistance and absorption ratio; before and after repair, measuring the air gap between the stator and the rotor; checking and cleaning the stator and rotor wedges, end binding wires, and spacers And end band binding; check the rotor short-circuit ring and copper bar; check and clean the bearing and lubrication system; check the rotor blade and balance weight device; check and process the rotor bracket welding seam; check the stator winding thermometer;

　　XNUMX. Overhaul (restorative repair)

　　Including medium repair content; according to the degree of insulation aging and fault conditions or test results, partial or complete replacement of stator windings or rotor windings; partial or complete replacement of stator windings or rotor windings; replacement of rotor squirrel cage bars or short-circuit rings; after rotor replacement or When the vibration is found to exceed the allowable value during operation, a dynamic balance test shall be carried out.