The machine case is one of the accessories of explosion-proof motor. The explosion-proof motor is the weight of the machine body. In the process of installation, if the machine case is damaged, we will replace it with another motor case. The case is different from other assembly parts, especially the explosion-proof motor.

　　Motor housing materials are generally cast iron, cast aluminum alloy. Shape steel (steel pipe), steel plate, etc. The common motor and the explosion-proof motor are castings made of cast pig iron. Because of the special use environment of explosion-proof motor, the electrical sealing treatment is relatively good, that is, the wiring parts inside the motor are damaged by fire, and will not ignite combustible gas in the external environment. The ordinary motor housing does not have the function of explosion-proof isolation, and the outlet line of the motor does not have special sealing measures.

　　After meet the requirements of the above, the explosion-proof motor generally by ordinary casing is ok, but the underground with series YBK2 flameproof motor to the requirements of the casing is higher, general downhole casing used in the explosion-proof motor must demand for steel shell, and stand, and the wind hood, junction box, insulation structure strengthening measures are taken to satisfy the requirements of underground work environment.