Optimum Design Of Spring Operating Mechanism For Vacuum Circuit Breaker

With the vacuum circuit breaker in the medium voltage rating,the reliability of its operation has been more and more attention.Vacuum circuit breaker is one of the main electrical appliances in high-voltage switch.The performance of vacuum circuit breaker directly affects the operation of the whole circuit.The main way to improve the reliability of vacuum circuit breaker is to optimize and simplify the operating mechanism.The spring operating mechanism is widely used in the vacuum circuit breaker because of its low power requirement and high reliability.It has important practical significance to analyze the mechanism,optimize the design and study the motion characteristics.In this paper,according to the requirements of the high-voltage circuit breaker for the spring operating mechanism,a kinematic and dynamic analysis of the CL spring operating mechanism of a GSR + type vacuum circuit breaker is carried out.Some key components are optimized.According to actual operating parameters,the correctness of this method is verified by comparing the results of theoretical analysis with actual parameters.The design method has universal applicability and provides theoretical guidance for the optimization design of spring operating mechanism.In order to obtain the influence of the parameters on the motion characteristics of the actuator,the equivalent model is used to deal with the kinetic parameters.The corresponding kinematic parameters are obtained,and the corresponding mathematical model is established.Secondly,the actuator model in Solidworks was imported into Adams,and the virtual prototype was set up.Based on the energy method,the process of opening and closing is modeled,and the principle of Adams solver-Lagrangian mechanics equation is adopted.The mathematical model is numerically calculated in Matlab.The calculated results are compared with the design parameters to verify the correctness of the model.Finally,combined with the above two modeling methods and the qualitative analysis of the simulation results,find the factors that affect the moving characteristics of moving contact closing,so as to optimize the design.Based on the equivalent curve method and the basic principle of instantaneous center of velocity and calculus,a cam optimization design method is presented.The feasibility of cam optimization is verified by theoretical calculation and actual contour size.The spring operating mechanism with the cam follower mechanism has universal applicability.The work of the paper provides the theoretical guidance for the optimization design of the CL spring operating mechanism equipped with the GSR + type vacuum circuit breaker,which is of great significance to the further research and development of the mechanism.