An explosion-proof brushless DC motor

Abstract

An explosion-proof brushless DC motor comprises a motor body and a controller, wherein an explosion-proof shell is arranged outside the motor body and the controller; the motor body and the controller are integrated through the explosion-proof shell; the explosion-proof shell comprises a front cover, a middle cover, a back cover, a front shell and a back shell; the matching positions of the front cover, the middle cover and the front shell are cylindrical, and the matching positions of the middle cover, the back cover and the back shell are cylindrical; the front shell is sleeved on the cylindrical structures at one end of the front cover and at one end of the middle cover; the front shell is in clearance fit with the front cover and the middle cover; the back shell is sleeved at the other end of the middle cover and outside the cylindrical structure of the back cover; the back shell is in clearance fit with the middle cover and the back cover; and a switch is arranged on the back cover. The explosion-proof brushless DC motor has the characteristics of simple structure, low cost of manufacturing, easiness in implementation and convenience in assembly and maintenance; the explosion-proof brushless DC motor solves the problems that the existing equipment is high in production cost, inconvenient to assemble and maintain, big in size, heavy in weight and difficult to implement; and the flame-proof surface of the explosion-proof brushless DC motor is a cylindrical surface and has more prominent advantages when applied in a mobile device.

Description

technical field [0001] The invention relates to an explosion-proof brushless DC motor whose explosion-proof surface is a cylindrical surface. Background technique [0002] Explosion-proof brushless DC motors are widely used as power equipment used in explosive gas environments. The current shortcomings are: 1) The flameproof surface of the explosion-proof shell is the end face, the processing and flameproof performance are poor, and the requirements for assembly and maintenance are high; 2) The protection treatment is an O-ring structure, which requires high processing costs and difficult assembly. See figure 2 . [0003] Chinese Patent Utility Model Specification Publication No. CN201063512Y discloses an explosion-proof permanent magnet brushless DC motor. As a whole, the explosion-proof body of the motor and the controller are formed. The explosion-proof surface is an end-face explosion-proof surface, and an O-shaped sealing ring structure is set on the explosion-proof...

AI Technical Summary

Problems solved by technology

The current shortcomings are: 1) The explosion-proof surface of the explosion-proof shell is the end surface, the processing and explosion-proof performance are poor, and the requirements for assembly and maintenance are high; 2) The protection treatment is an O-ring structure, the processing cost is high, and the assembly is difficult.

Although the above flameproof and protection methods are achievable, in the manufacturing process, unqualified products are often prone to appear. The flameproof surface is because the end surface processing accuracy is relatively high, and machining the end surface is more difficult than the cylindrical surface. In addition, The explosion-proof formation of the end face is related to the tightness of the connection, and the deformation of the end face after connection also affects its explosion-proof performance; in terms of protection, the processing precision of the O-shaped sealing ring groove is high, and the service life of rubber products is not long, which also affects its protection performance

The existing flameproof surface has high requirements for assembly and maintenance, and the assembly is difficult

Designers also want to try to improve, the main reason is that the interconnection of explosion-proof enclosures has not been completely resolved. Even if there is a good solution, the structural requirements of the explosion-proof protective O-ring seal must be considered, resulting in no simple, reasonable, and just-right optimal solution. best solution

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