Efficiency optimization of the connecting rod drive mechanism of the ultrahigh voltage circuit breaker

MENG Fan-gang, WU Shi-jing, ZHANG Zeng-lei, ZHANG Fan

(School of Power and Mechanical Engineering, Wuhan University, Wuhan 430072, China)

Abstract: Aiming at the low efficiency and reliability of the ultra-high voltage circuit breaker transmission mechanism, the kinematic differential equations of the mechanism was built based on analyzing the mechanism′s composition principle, and the efficiency calculation model of the mechanism was built according to the conservation of energy. By solving this model, efficiency curves changing with stroke were obtained. Meanwhile, a new optimal scheme was designed according to the efficiency calculation model by changing the articulated point position and length of the connecting rod, considering the certain needs of the transmission mechanism were met. Better was the transmission performance that the transmission angle was close to 90 degree and the transmission efficiency was improved more than 6%. The results indicate that the transmission efficiency and performance of the mechanism could be effectively improved and optimized by adopting the model, which calculates the organization efficiency and optimizes the design method of high voltage circuit breaker transmission mechanism.