A study on stabilization of operation time for hydraulic operating circuit breaker (Simulation and investigation of hydraulic stabilization system holding constant high pressure)

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Other Title
  • 遮断器用油圧操作装置の動作時間安定に関する研究（常時高圧保持による動作安定方式の動作解析と検討）

Abstract

Numerical simulation for a hydraulic operation stabilizing system of gas circuit breaker (GCB) driven by a hydraulic operating mechanism is treated . Valve collision and hydraulic column separation, created in hydraulic fluid by the movement of valves, are simulated. Constrictions between main piston and latching mechanism which is used to control the movement of the piston is taken into consideration. Results of simulation agree well with the experiments on the characteristics of the movement of valves, piston and hydraulic pressure. It is confirmed that the hydraulic mechanism with a hydraulic operation stabilizing system is stably operated, not affected by hydraulic column separation. Dimension of return circuit and latching mechanism which constitute a hydraulic operation stabilizing system are investigated. The range of diameter of restrictors in the circuit and latch angle to optimize a hydraulic operation stabilizing system are shown.

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