Abstract:

The buffer device of the operating mechanism can effectively absorb the excess energy of parts in the closing process of the air circuit breaker,so as to improve the service life and reliability of the air circuit breaker.The working principle and failure phenomenon of the operating mechanism of the air circuit breaker and the working principle of the buffer device involved are described.The three-dimensional model is established through UG and imported into the dynamic simulation software ADAMS to establish the simulation model,set the motion relationship and parameters in the motion process,focus on the comparison and analysis of the force conditions of vulnerable parts and the action characteristics of the operating mechanism before and after adding the buffer device,and shoot the action process of the operating mechanism and the mechanical life test of the air circuit breaker by the high-speed camera.The correctness of the simulation results and the effectiveness of the buffer device are verified,which provides a reference and basis for improving the mechanical life parameters of the air circuit breaker.

Key words: air circuit breaker, operating mechanism, buffer device, ADAMS, dynamic simulation