Maintenance requirements for explosion-proof permanent magnet motors

Explosion-proof permanent magnet motors will inevitably be damaged after being used for a long time. Therefore, we should also pay attention to the maintenance and upkeep of explosion-proof permanent magnet motors in daily life, and remember to clean the motor regularly. So how should we repair a faulty explosion-proof motor? And what are the maintenance requirements? Let’s learn together below!

When the explosion-proof permanent magnet motor is trial-produced and finalized, the explosion-proof inspection unit shall conduct explosion-proof inspection. The drawings and documents shall be reviewed for explosion-proof, the prototype shall undergo explosion-proof testing, and the explosion-proof certificate and production license shall be obtained before it is allowed to be put into production and sales. Explosion-proof motors produced by explosion-proof permanent magnet motor manufacturers are allowed to leave the factory only after passing the specified factory inspection and type test inspection. Therefore, under normal circumstances, the explosion-proof safety performance of explosion-proof motors can meet the standard requirements. However, explosion-proof permanent magnet motors will also be damaged to varying degrees due to mechanical, chemical and other effects during use.

For example, the explosion-proof shell will be impacted during operation, resulting in cracks or deformation, the bearings will be worn or damaged due to poor lubrication, the stator winding will age due to long-term exposure to heat and chemical media, or be damaged by the impact of high voltage. Breakdown, long-term overload of the motor will cause the windings to overheat or even be burned out, and the explosion-proof joint surface of the flameproof shell will be corroded and damaged by the moisture in the coal mine. Therefore, construction workers should repair or repair faulty explosion-proof motors.

The maintenance requirements for explosion-proof permanent magnet motors are as follows:

1. Explosion-proof motors must not be disassembled at will; when disassembling and repairing, the explosion-proof surface of the part cannot be used as the fulcrum of the crowbar, and it is not allowed to knock or hit the explosion-proof surface.

2. When disassembling the motor, the construction worker should remove the windshield and fan, then use a casing wrench to remove the bolts of the end cover and bearing cover, and then use a log or copper rod to hit the shaft extension in the axial direction to make the end cover and machine Separate the base and remove the rotor. After dismantling the parts, place them with the explosion-proof surface facing up and cover them with rubber or cloth gaskets. Then tighten the bolts, spring washers, etc. and be careful not to lose them.

3. When performing motor dipping and assembly operations, the insulating paint or dirt attached to the explosion-proof surface should be cleaned. Remember not to scratch it with hard objects such as iron sheets, but you can use a whetstone to grind uneven places.

4. If the explosion-proof surface is damaged, we must use -tin solder HISnPb58-2. The flux is 30% hydrochloric acid (for steel parts) or tin-zinc solder containing 58~60% tin. The flux is ammonium chloride 30 %, zinc chloride 70%, water 100~150% mixed solution (for iron castings) for welding repair. In addition, the solder must be firmly bonded to the part, and the raised parts must be smoothed to achieve the specified finish.

5. In order to prevent the explosion-proof surface from rusting, we should apply engine oil or 204-1 replacement anti-rust oil on the explosion-proof surface.