Method for preventing cam kickback of spring operating mechanism and device for realizing the method

Abstract

The invention discloses a method of preventing spring operating mechanism cam reverse beating. The method comprises the following steps of additionally installing a protection cover above a circuit breaker collection control box K9 relay; replacing an energy storage motor and a reduction gearbox, carrying out on-site / distant place closing operation for three times, and measuring two groups of energy storage time related to an FA5 type operation mechanism, visible numbers of teeth of an energy storage gear and rear punching angles of an energy storage top rod before and after the energy storage motor is changed and before and after the reduction gearbox is changed; setting a motor brake pad of a copper alloy material on an energy storage motor output rotating shaft; and assessing an energy storage top rod stop position, the visible number of teeth and the rear punching angle of the FA5 type operation mechanism. In the invention, the protection cover is additionally installed so that a condition that an operation person presses the K9 relay to carry out motor energy storage can be avoided; output power and a rotation speed of the energy storage motor are reduced, the brake pad is arranged on the motor output shaft so that a damping effect to the output shaft is increased, the rear punching angle of the energy storage top rod is guaranteed to be less than a 90 degree and generation of FA5 type spring operation mechanism cam reverse beating can be effectively prevented.

Description

technical field [0001] The invention relates to the technical field of operation and maintenance of a spring operating mechanism of a high-voltage circuit breaker, in particular to a method for preventing the cam of the FA5 type spring operating mechanism of a 500kV circuit breaker from kicking back and a device for realizing the method. Background technique [0002] At present, failures of the 500kV circuit breaker FA5 spring operating mechanism occur frequently. In recent years, 10 cam reverse failures have occurred in the network, resulting in cracking of the closing buffer bearing and cracking of the mechanism shell, affecting the reliable opening and closing of the circuit breaker, which has endangered To the safe operation of the grid. The disintegration of the fault mechanism found that the sharp corners of the small cam of the energy storage gear were abnormally worn. The closing buffer bearing and the force acting on the housing itself will cause the closing buffer...

AI Technical Summary

Problems solved by technology

[0002] At present, failures of the 500kV circuit breaker FA5 spring operating mechanism occur frequently. In recent years, 10 cam reverse failures have occurred in the network, resulting in cracking of the closing buffer bearing and cracking of the mechanism shell, affecting the reliable opening and closing of the circuit breaker, which has endangered To the safe operation of the grid

The disintegration of the fault mechanism found that the sharp corners of the small cam of the energy storage gear were abnormally worn. The closing buffer bearing, and the force is applied to the housing itself, causing the closing buffer bearing to break and the mechanism housing to crack

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