弹簧操动机构分闸扣板冲击疲劳寿命估算  

Estimation of Impact Fatigue Life of Spring Operating Mechanism’s Opening Gusset Plate

作　　者：王镔 赵大勇 李谦 WANG Bin;ZHAO Dayong;LI Qian(Instrument and Electric Operation and Maintenance Center,China Petroleum Dalian Petrochemical Company,Dalian 116031,China;School of Mechanical Engineering,Dalian Jiaotong University,Dalian 116028,China)

机构地区：[1]中国石油大连石化公司仪电运维中心,辽宁大连116031 [2]大连交通大学机械工程学院,辽宁大连116028

出　　处：《电器与能效管理技术》2024年第1期31-37,46,共8页Electrical & Energy Management Technology

摘　　要：针对弹簧操动机构分闸扣板在工作过程中失效的问题,提出了一种适用于受强冲击载荷的疲劳寿命计算方法。运用RecurDyn对整体弹簧操动机构进行运动学分析,得到合闸速度、行程与弹簧力。基于运动学模型利用Lsdyna进行冲击动力学仿真,得到合闸过程中分闸扣板应力集中处的时间应力曲线。针对其失效特点,采用局部应力应变法加冲击损伤修正方法进行寿命估算,得到的结果为9216次,与实际测试次数10000次相比,误差为7.8%,符合工程要求。A fatigue life calculation method suitable for strong impact loads is proposed to address the failure problem encountered by the opening gusset plate of the spring operating mechanism during operation.The kinematic analysis on the overall spring operating mechanism using RecurDyn is performed to obtain the closing speed,stroke,and spring force.Based on the kinematic model and using Lsdyna for impact dynamics simulation,the time stress curve at the stress concentration point of the opening gusset plate during the closing process is obtained.Based on its failure characteristics,the local stress-strain method combined with impact damage correction method is used for the life estimation,and the result obtained is 9216 times.Compared with the actual testing frequency of 10000 times,the error is 7.8%,which can meet the engineering requirements.

关 键 词：弹簧操动机构 冲击疲劳寿命 局部应力应变法 冲击损伤修正 

分 类 号：TM561[电气工程—电器]