运动副间隙对MCCB操作机构动力学特性的影响研究  

Study on Influence of Clearance of Motion Pair on Dynamic Characteristics of MCCB Operating Mechanism

作　　者：肖安建 李红军[1] 戴水东[2] 赵海峰[2] XIAO Anjian;LI Hongjun;DAI Shuidong;ZHAO Haifeng(School of Mechanical Engineering and Automation,Zhejiang Sci-Tech University,Hangzhou 310018,China;Hangshen Group Hangzhou Zhijiang Switchgear Co.,Ltd.,Hangzhou 311234,Chian)

机构地区：[1]浙江理工大学机械与自动控制学院,杭州310018 [2]杭申集团杭州之江开关股份有限公司,杭州311234

出　　处：《机械科学与技术》2024年第10期1654-1663,共10页Mechanical Science and Technology for Aerospace Engineering

基　　金：浙江省基础公益研究计划(LGJ21E05000)。

摘　　要：针对MCCB操作机构的7个铰链点间隙对机构动力学特性的影响,基于正交试验设计法建立了18组仿真实验,通过极差分析得出了各间隙点对操作机构各指标的影响大小,采用带权重的分目标乘除法相结合的方式建立综合评价函数,对动触杆在位移、速度、加速度和下连杆的应力分析方面做了无间隙和有间隙的仿真对比分析。结果表明:仿真时忽略其运动副间隙的影响,所得各指标仿真值最大偏差达49.45%,平均偏差至少5%以上;对MCCB操作机构综合影响最大的间隙点为推拉杆与上连杆的连接轴间隙,理想铰链下的动力学仿真,位移变化、应力的分布及基本变化可供参考,而速度特性、加速度特性、最大应力值以及最大应力出现时刻则会偏离实际。In view of the influence of the clearance of 7 hinge points of MCCB operating mechanism on the dynamic characteristics of the mechanism,18 groups of simulation experiments are designed by using the orthogonal experimental design method.The influence of the each clearance point on the indexes of the operating mechanism is obtained through the range analysis.The comprehensive evaluation function is established by combining the weighted sub objective multiplication and division method.Finally,the dynamic contact rod is in terms of the acceleration and stress analysis of the lower connecting rod,the simulation and comparative analysis without clearance and with clearance are made.The results show that if the influence of the clearance of the moving pair is ignored in the simulation,the maximum deviation of the simulation values of each index is 49.45%,and the average deviation is at least 5%.The clearance point with the greatest comprehensive impact on the MCCB operating mechanism is the connecting shaft clearance between the push-pull rod and the upper connecting rod.The dynamic simulation under the ideal hinge chain,its displacement change,stress distribution and basic change trend can be used for reference,while the speed characteristics,acceleration characteristics The maximum stress value and the occurrence time of the maximum stress will deviate from the reality.

关 键 词：MCCB操作机构 铰链点间隙 正交试验设计 极差分析 综合评价函数 

分 类 号：TH113[机械工程—机械设计及理论]