真空断路器弹簧操动机构凸轮优化设计  

Cam Optimization Design of Spring Operating Mechanism of Vacuum Circuit Breaker

作　　者：熊显智 王平[2] XIONG Xianzhi;WANG Ping(Xi’an XD Power System Co.,Ltd.,Xi’an 710065,China;Xi’an High Voltage Apparatus Research Institute Co.,Ltd.,Xi’an 710077,China)

机构地区：[1]西安西电电力系统有限公司,西安710065 [2]西安高压电器研究院有限责任公司,西安710077

出　　处：《高压电器》2020年第11期116-123,共8页High Voltage Apparatus

摘　　要：对于真空断路器而言,在弹簧操动机构输出轴与灭弧室之间的连杆机构、灭弧室传动系统确定后,其合闸速度取决于操动机构出力特性和断路器负载特性的匹配程度,取决于凸轮的设计。文中的凸轮轮廓由四段圆弧相接组成,通过改变各圆弧圆心位置、半径及圆周角,使凸轮输出力矩匹配负载力矩,满足输出轴转角及所需的合闸速度。针对12 kV干燥空气绝缘断路器用弹簧操动机构,依据低、中、高3种平均合闸速度分别优化凸轮。在Adams内建立断路器虚拟样机,将优化的3种凸轮导入虚拟样机中进行仿真分析及比较。结果表明,文中的凸轮优化方法是有效的,选择中合闸速度优化凸轮使操动机构能同时兼顾可靠性及降低合闸功。A vacuum circuit breaker’s closing speed depends on the matching degree between its load characteris-tics and the output characteristics of the spring operating mechanism if the linkage mechanism and the vacuum inter-rupter transmission system,which are located between operating mechanism and vacuum interrupter,have been de-termined,while the matching degree depends on the cam profile.This study conducts optimization design of the cam.The cam profile consists of four arcs.The output torque of the cam can match the load torque,and satisfactory output shaft angle and closing speed can be obtained by changing the center position,radius and circumferential angle of each arc.For a spring operating mechanism used in 12 kV dry air insulated circuit breaker,the cams are optimized considering low,medium and high average closing speed,respectively.A virtual prototype of circuit breaker is built in Adams,and three different optimized cams are imported into the virtual prototype for simulation analysis and com-parison.The results show that the cam optimization method in this paper is effective,and the cam which is optimized for medium closing speed well balance reliability and closing power of the operating mechanism.

关 键 词：弹簧操动机构 凸轮 合闸速度 优化 

分 类 号：TM561.2[电气工程—电器]