Requirements for maintenance

Release date：

2021-09-15

The explosion-proof motor shall not be disassembled at will; the explosion-proof surface of the parts shall not be used as the fulcrum of the crowbar, and the explosion-proof surface shall not be knocked or impacted.

1. The explosion-proof motor shall not be disassembled at will; the explosion-proof surface of the parts shall not be used as the fulcrum of the crowbar, and the explosion-proof surface shall not be knocked or impacted.

2. When removing the motor, the wind shield and fan shall be removed first, and then the bolts of the end cover and bearing cover shall be removed by the sleeve spanner. Then, the shaft extension shall be impacted by a log or copper rod along the axial direction to separate the end cover from the base, and finally the rotor shall be removed. Remove the parts, the explosion-proof side should be placed upward, and cover with rubber or cloth gasket, and pay attention not to lose the bolts and spring pads.

3. When dipping and assembling, the insulating paint or dirt attached to the explosion-proof surface shall be cleaned, and hard objects such as iron sheet shall not be used to scratch, but the uneven place can be ground with oilstone.

4. If the explosion-proof surface is damaged, lead tin solder hisnpb58-2, 30% hydrochloric acid (for steel parts) or tin zinc solder with 58 ~ 60% tin content must be used. The welding flux is ammonium chloride 30%, zinc chloride 70%, and water 100 ~ 150% mixed solution (for iron castings). The bonding between the solder and the parts should be firm, and the convex part should be ground smooth to reach the specified finish.

5. In order to prevent rust on the explosion-proof surface, oil or 204-1 replacement type rust proof oil should be applied on the explosion-proof surface.

Explosion-proof motor is mainly used in coal mine, oil and gas, petrochemical and other industries. This is because the explosion-proof motor does not produce electric spark during operation, so it is a kind of motor that can be used in flammable and explosive places. In addition, it is also widely used in textile, grain and oil processing, papermaking, metallurgy, city gas, transportation, medicine and other departments. Explosion-proof motor is the main power equipment, usually used to drive pumps, fans, compressors and other transmission machinery.

2022-10-21

How to wire the explosion-proof motor

The inlet of the explosion-proof motor junction box is sealed by pressing the rubber ring. The weakness of this structure is the aging of the rubber ring and the elastic failure, which makes the cooperation between the cable and the rubber ring inconsistent. For the junction box of the double outlet of the explosion-proof motor, the unnecessary outlet should be blocked with a metal sealing piece of thickness not less than 2mm. The outer diameter of the metal sealing piece should be close to the inner diameter of the outlet hole of the inlet and outlet device, so as to ensure that the sealing ring is evenly pressed by the pressure plate or the pressing nut to achieve a reliable seal.

2022-10-21

Explosion - proof motor lifting and storage

All EXPLOSION-PROOF MOTORS NEED TO BE LIFTED WITH DERRICK OR HOLE, NOT allowed TO BE lifted or supported at the core punching plate or coil, when the whole EXPLOSION-proof motor is lifted, sling should be used to make weight distribution uniform, and brace should be used to avoid deformation of the roof. Careless handling during installation and incorrect use of derrick and hook are likely to cause more damage to explosion-proof motor than years of operation. Care should be taken not to damage the windings when handling the motor.

2022-10-21