大型捣固装煤车捣固机机架的优化及疲劳分析  

Optimization and fatigue analysis of tamping machine frame for a large stamping charging car

作　　者：王俊 王亚良[1] 宁晓斌[1] 左强[2] 孙乃鑫 WANG Jun;WANG Ya-liang;NING Xiao-bin;ZUO Qiang;SUN Nai-xin(College of Mechanical Engineering,Zhejiang University of Technology,Hangzhou 310014,China;Technology Center,Taiyuan Heavy Industry Co.,Ltd.,Taiyuan 030024,China)

机构地区：[1]浙江工业大学机械工程学院,浙江杭州310014 [2]太原重工股份有限公司技术中心,山西太原030024

出　　处：《机电工程》2018年第9期927-932,共6页Journal of Mechanical & Electrical Engineering

基　　金：国家自然科学基金资助项目(51375452);山西省煤基重点科技攻关项目(MJH2014-08)

摘　　要：针对某大型捣固装煤车捣固机设计技术的吸收问题,在提锤和落锤工况下,对某6.25 m大型捣固装煤车的捣固机机架进行了分析,对捣固机机架的尺寸优化与疲劳分析的方法进行了归纳,提出了一种基于多体动力学与有限元法的研究方法。通过建立捣固机的动力学模型,并运用动力学仿真校验模型,得出了轴承座的力-时间曲线;采用有限元方法对捣固机机架进行了尺寸优化与强度分析,得到了机架的尺寸优化结果,并确定了机架在捣固锤提升与落下工况下的最大位移、最大应力;最后采用有限元方法,对尺寸优化后的捣固机机架进行了疲劳分析。研究结果表明:重新正向设计优化后的捣固机机架减重明显,在满足使用要求的前提下能有效提高捣固装煤车的经济性。Aimming at digesting the tamping machine＇s design technology of a large tamping coal charging car,a frame of 6. 25 meters large tamping machine was analysed under the condition of lifting and dropping hammer. The method of dimension optimization and fatigue analysis of the tamping machine frame were summarized,and a research method was proposed based on multibody dynamics and finite element method. The model was verified and the forces-time curves of bearing seats were obtained by dynamic simulation,based on the dynamic model of hammer lifting device. Then,the finite element method was used to the dimension optimization,and the strength analysis of the tamping machine frame under the condition of lifting and dropping tamping hammer. The result of the dimension optimization of the frame was obtained.The maximum displacement and stress of the frame were determined. Finally,the finite element method was used to analyse the fatigue of the optimized tamping machine frame. The results indicate that the weight of tamping machine is reduced,which can improve the economic efficiency of tamping coal charging car effectively.

关 键 词：捣固机机架 静强度分析 尺寸优化 疲劳分析 

分 类 号：TH122[机械工程—机械设计及理论] TD402[矿业工程—矿山机电]