高压断路器螺旋弹簧触指分析及计算

Analysis and Calculation of the Screw Spring Contact for High-voltage Circuit Breaker

触指是高压断路器最核心的部件,计算其接触压力、分析滑动摩擦力的变化是研究断路器机构动态特性的关键。以螺旋弹簧触指的结构特点为基础,列出弹簧触指标准化尺寸。将一个节距的弹簧触指简化为一端固定的当量悬臂梁,建立了触指径向变形量和接触压力的变化方程,运用辛普森数值积分法进行计算,考虑不同型号触指参数对额定圈数的影响,得到触指滑动摩擦力的变化规律。

Contact is the core of the high-voltage circuit breaker, calculations of the contact pressure and analysis of the sliding friction change are the key points for the study of dynamic characteristics of high-voltage circuit breaker mechanism. In this paper, standardized dimensions of spring contact were listed based on structural features of screw spring contact. On the basis that one pitch of spring was considered as an equivalent cantilever, governing equations of radial deformation and pressure of spring contact were established and calculated by using Simpson numerical integration method, the changing rule of sliding friction was received by considering the effects of different type contact parameters on the rated laps of contact at the same time