真空断路器弹簧操动机构中连杆机构的容差优化

Tolerances Optimization for Linking Member of Spring Mechanism in Vacuum Circuit Breaker

在对弹簧操动机构运动学、动力学分析的基础上,以真空断路器的分断、合闸速度特性等技术指标为约束条件,以弹簧操动机构的杆件尺寸及其容差为变量,以相对容差大、成本低为目标,将离散随机方向搜索与复合型算法相结合对系统实施了容差优化。同时给出了能够满足弹簧操动机构分、合闸特性的杆件尺寸及最大容差,为真空断路器弹簧操动机构的设计提供一种新的优化设计方法。

In this paper, based on the kinematics and dynamic analysis of a spring actuator, the specifications of the breaking and closing velocity characteristic of vacuum circuit breaker are taken as constraints, the lengths of the linkages of the spring actuator and its tolerances are chosen as the optimization variables, and the materials costs of those linkages and its relative tolerances compose the multiple objection function. The optimization strategy integrated discredited random direction searching with complex algorithm is adopted for solving the optimal tolerance design problem. As the optimization results, the optimized nominal parameters of the components and their largest tolerances of the actuator are given automatically. When the component tolerances are within the optimum tolerance region, the breaking and closing characteristics are all satisfied. It proves to be a new optimization design strategy.