Cushion process of fast working cylinder in high voltage circuit breaker
                                            ZHAO Wen qiang1，2, YUAN Hao1, WANG Zhen2, LAI Qi wei1
（1.Key Laboratory of Hubei Province For WaterJet Theory & New Technology, Wuhan University, Wuhan 430072, China;2.Pinggao Group Co., Ltd., Pingdingshan 467000, China）


Abstract: Aiming at the serious hydraulic shock phenomenon in the high voltage circuit breaker cylinder under the condition of high speed heavy load， the centralized parameter modeling of the segment buffer throttling process of the high voltage circuit breaker cylinder was carried out， and the CFD simulation analysis of the cylinder buffer process based on the CFD model of the high voltage circuit breaker cylinder was carried out. The change of the Reynolds number and the change of the distance between the piston and the turbulent laminar flow were suggested to simulate the process of the cylinder cushioning process as the two optimum proposals. The simulation results show that the optimized model has higher accuracy and engineering practical value.
Key words: high voltage circuit breaker; working cylinder; cushion