Crane network technicians briefly describe the failure analysis of the gantry crane brake failure. The crane will encounter some problems during the operation. Our technicians will answer the gantry crane fault. Briefly describe the failure analysis of the gantry crane brake failure. The crane net technician briefly describes the failure analysis of the gantry crane brake failure. The crane will encounter some problems during the operation. Our technicians will answer the gantry crane fault.
During the rotary operation, the brake failure can cause the limit torque limiter to slip when it does not reach its design resistance torque when the rotary worm gear reduction box is disassembled.
(1) Reason analysis: In actual operation, the gantry crane rotates and starts to brake very frequently, so that the friction disc of the torque limiter and the cone surface of the worm wheel sleeve often have relative motion and wear, and the upper and lower friction discs gradually close together along the worm cone surface. Since the intersection of the upper and lower cone surfaces of the worm wheel sleeve is an angle and the diameter is smaller than the diameter of the small end of the friction disc, the annular boss is ground on the inner surface of the worm wheel, and the pressing force generated by the compression spring is used. It is shared by the conical surface and the annular boss plane. When the pressing force of the annular boss plane is dominant, the above-mentioned fault occurs when the frictional arm of the convex plane is short and the friction surface is small, so that the friction torque is reduced and less than the original design torque.
(2) Exclusion method: disassemble the rotating worm gear reducer, remove the worm wheel, and remove the annular boss on the inner cone surface of the worm wheel, so that the intersection of the two cone faces of the worm wheel sleeve is a transitional cylindrical surface, and the cylindrical surface The diameter is slightly larger than the diameter of the small end of the friction disc. Http://news.chinawj.com.cn Editor: (Hardware Business Network Information Center) http://news.chinawj.com.cn
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