During the use of explosion-proof motor, the main fault caused by the frame is its deformation, which will directly affect the operation of the explosion-proof motor. So, what causes the frame to deform? Next small make up to explain to us:
The deformation of the frame is composed of planning and manufacturing factors:
1。 Planning reasons: the mechanical parts are not completely planned according to the theory of structural mechanics, such as the size, shape and orientation planning of axial and radial ribs on the frame; The overall layout of the frame is not symmetrical。 For example, after the processing of the lower part of the effective part is too small。
2。 Manufacturing reasons: the aging is not in place; Metalworking processing fashion card parts and stress is not uniform, after processing, loosen the card tight parts, the machine base due to rebound and deformation。 Deformation occurred during handling, but this is an unnecessary cause。
Due to the existence of resonance phenomenon in the operation of explosion-proof motor, it often appears at a certain speed and is transient in the process of starting. Therefore, the frame deformation is not easy to detect. Deformation due to inadequate aging is not easy to detect. It takes a long time for the welding stress to be completely released, so it is difficult to find in the process, especially the construction period is short. This is a classic pitfall. Therefore, special attention must be paid to the production of explosion-proof motors.