Spring operating mechanism cooperated with 126kV vacuum circuit breaker separation-integration characteristic

Abstract

The invention relates to a spring operating mechanism matched with a 126kV vacuum high-voltage circuit breaker, the invention designs the contour trajectory of a cam to achieve the best match of the output characteristics and the load characteristics; when in closing process, the speed at instant of touching is controlled in the reasonable range to effectively reduce the closing bounces, and the mechanism can also be ensured to overcome the reaction force of a contact spring at the end of the closing; the design of the size and the position of an oil drain hole on a wall of a buffer can allowthe circuit breaker to ensure higher speed at instant of touching during the opening process to allow an arc-extinguishing chamber to rapidly enter the short arcing time, thus allowing the average speed to be maintained within a certain range, ensuring the long arcing time of the circuit breaker and further being conductive to the arc extinguishment; the spring operating mechanism can solve the problem of poor match of the output force of the mechanism in the past with the load characteristics of the vacuum circuit breaker, reasonably distribute energy to the overall motion process of the circuit breaker and reduce the opening and closing works of the mechanism.

Description

Spring Operating Mechanism Matching the Opening and Closing Characteristics of 126kV Vacuum Circuit Breaker technical field The invention relates to a mechanical transmission device for switching on and off of a high-voltage vacuum circuit breaker, in particular to a spring operating mechanism matching the speed characteristics and load characteristics of a 126kV vacuum circuit breaker. Background technique At present, SF6 circuit breakers occupy an absolute dominant position in the field of high voltage and ultra-high voltage, so most high-voltage operating mechanisms are designed to match the opening and closing characteristics of SF6 circuit breakers. At present, with the continuous improvement of the technical level of high-voltage AC vacuum circuit breakers and the continuous expansion of market demand, the demand for a matching superior and reliable operating mechanism on the vacuum circuit breaker is increasingly urgent. The spring operating mechanism is the most w...

AI Technical Summary

Problems solved by technology

Compared with other types of operating mechanisms, the structure of the spring operating mechanism is more complicated, and the requirements for the machining accuracy of the parts are higher

Images