低压断路器操作机构可靠性与优化设计技术研究-电气工程专业论文.docxVIP

河北工业大学硕士学位论文 低压断路器操作机构可靠性与优化设计技术研究 摘 要 低压断路器是电力行业低压电器产品的重要组成部分，随着自动化水平的进一步提 高，对断路器产品的性能和寿命要求也就越来越高，而断路器的可靠性主要决定于其操作 机构的可靠性。因而研究低压断路器操作机构的可靠性和优化设计技术具有重要的意义和 实用价值。 以 CM1-225 型低压塑壳断路器为主要研究对象，本课题对断路器操作机构的分闸过 程、可靠性分析与优化设计进行了研究。 首先使用三坐标测量仪和 PRO/E 软件建立塑壳断路器的三维模型，在 PRO/E 中进行零 部件的装配，通过接口软件 MECH/PRO 导入 ADAMS 中，进行初步分析，并根据实际参 数完善模型。 基于应力-强度干涉模型对断路器操作机构可靠性分析方法进行了研究。利用 ADAMS 的柔性体建模功能建立了操作机构的刚柔耦合模型。通过仿真分析，得到了操作机构关键 部件的应力值变化和分布情况。将仿真数据与可靠性设计理论相结合，得出了相关部件的 静强度可靠度和疲劳强度可靠度。 通过仿真分析操作机构分断弹簧的刚度系数、关键轴的位置和关键部件的质心位置对 断路器分断速度的影响，找出影响分断速度的关键因素。以其作为设计变量，并以提高分 断速度为优化目标，对操作机构进行了优化。 本课题是结合河北省自然科学基金资助重大项目“电力系统保护电器可靠性理论与网 络化技术研究及其应用”进行的。 关键词：低压断路器，操作机构，可靠性分析，优化设计，虚拟样机 i 低压 低压断路器操作机构可靠性与优化设计技术研究 STUDY ON THE RELIABILITY AND OPTIMUM DESIGN OF LOW-VOLTAGE CIRCUIT BREAKER OPERATING MECHANISM ABSTRACT Low-voltage circuit breakers is an important member of low-voltage electrical apparatus. With the improvement of the automation level, the demands of the circuit breakers product performance and life have become improved. The reliability of circuit breakers is mostly dependent on the performance of operating mechanism. Its significant and useful that study on the reliability and optimum design of low-voltage circuit breaker operating mechanism. Focusing on CM1-225 Molded Case Circuit Breaker, this paper studied the break-brake process, reliability analysis and optimization design of the circuit breaker operating mechanism. The three-dimensional model of MCCB was established based on the PRO / E software and three dimensional measuring machines, and then assemble the part each other with the PRO/E software. The model was imported to ADAMS through interface software. After a preliminary analysis, the model was refined with the actual parameters. Based on the stress - strength interference model，this paper studied the reliability analysis methods of the circuit breaker operating mechanism.The rigid-flexible coupling model of operating mechanism was setting up through the modeling agencies of ADAMS flexible bo