The particularity of the working conditions of explosion-proof motors is that there are flammable and explosive materials or explosive gas mixtures in the surrounding environment. Coal mines, oil and gas output supply, petrochemical and chemical industries and other places should choose explosion-proof motors. In addition, in textiles, metallurgy, city gas, transportation, grain and oil processing, papermaking, medicine and other departments, due to safety requirements, there will also be explosion-proof motors. Applied to explosion-proof motors. The explosion-proof methods include: isolation and blocking, controlling the surface temperature of the heating element, and preventing the generation of sparks in the explosive mixed gas environment.
In view of the particularity of the application site of explosion-proof motors, the design, manufacture, and parts selection and testing of explosion-proof motors are relatively strict compared with ordinary motors. This article uses the particularity of the material selection of explosion-proof motor fans to communicate and discuss with you.
The outer fan and the winding part of the flameproof motor are spaced apart from each other, but why are there special requirements for its material? Its purpose is to eliminate the generation of sparks and eliminate the possible detonation factors of the motor to the greatest extent, that is, to prevent the static electricity and sparks that may be generated by the fan rotation.
Any two objects of different materials are separated after contact, and static electricity will be generated, which is the so-called triboelectricity. The better the insulation of the material, the easier it is to generate static electricity. Compared with metal materials, the better the insulation performance of plastics, the easier it is to generate static electricity. In order to avoid this problem, explosion-proof motors generally do not use plastic fans. Even if they are used, they must be anti-static fans, which are plastic fans specially used for explosion-proof motors in a large number of explosion-proof environments.
Compared with ordinary motors, the manufacturing process of explosion-proof motors is strictly controlled, especially the repair of explosion-proof motors must be different from ordinary motors, whether it is the protection of the explosion-proof surface of parts during the disassembly process, or the disposal of wiring parts and sealing parts. must be in place. Usually, when repairing explosion-proof motors, a qualified repair unit must be selected to ensure that the explosion-proof joint surface, explosion-proof parameters, and replacement parts comply with explosion-proof regulations.
From the production management classification of motors, explosion-proof motors are managed according to production licenses. In June 2017, the state adjusted some production license management products to product compulsory certification management, and production license management was reduced to 38 categories. Explosion-proof motors still belong to the management category.
Post time: Feb-14-2023