采煤机电缆导体弹性模量等效及弯曲工况仿真研究  

Simulation Study on Elastic Modulus Equivalent and Bending Condition of Cable Conductor of Shearer

作　　者：谢波 夏海金 董北林 朱成赞 孔昭洋 赵丽娟[2] XIE Bo;XIA Haijin;DONG Beilin;ZHU Chengzan;KONG Zhaoxiang;ZHAO Lijuan(Shandong Yankuang Group Changlong Cable Manufacturing Co.,Ltd.,Zoucheng Shandong 273500,China;College of Mechanical Engineering,Liaoning Technical Universit,Fuxin Liaoning 123000,CHina)

机构地区：[1]山东兖矿集团长龙电缆制造有限公司,山东邹城273500 [2]辽宁工程技术大学机械工程学院,辽宁阜新123000

出　　处：《机械设计与研究》2024年第4期180-186,共7页Machine Design And Research

基　　金：国家自然科学基金资助项目(51674134);教育部科技发展中心“数启科教智见未来”产教联合基金资助项目(2018A04025)。

摘　　要：采煤机电缆为采煤机提供电力和控制信号,其工作性能和使用寿命对煤矿开采效率、井下供电系统的安全运行尤为重要。为分析采煤机移动软电缆弯曲受力及疲劳寿命,以某型采煤机电缆为工程对象,基于股线拉伸试验,应用微分几何理论和均匀化分析方法推导动力线芯导体和地线芯导体的等效弹性模量,从而将电缆导体复杂的股线结构简化为等截面圆柱,构建电缆弯曲有限元模型并进行弯曲工况仿真及疲劳寿命分析。结果表明,该型电缆动力线芯和地线芯导体等效弹性模量分别为16.520 GPa和18.230 GPa左右,控制线芯导体股线弹性模量试验值为24.432 GPa,且等效弹性模量随导体绞合节径比的增加而逐渐增大;当电缆弯曲半径为其直径6倍时,动力线芯、地线芯和控制线芯导体弯曲应力依次为158.08 GPa、153.49 GPa和168.31 GPa,导体应力由弯曲约束部分向两端逐渐减小;动力线芯、地线芯和控制线芯导体疲劳寿命分别为5.99×10^(4)、6.475×10^(4)和5.152×10^(4),疲劳寿命分布趋势与应力分布情况一致。The shearer cable provides power and control the signals for the shearer,and its working performance and service life are particularly important for the efficiency of coal mining and the safe operation of the underground power supply system.In order to analyze the bending force and fatigue life of the mobile flexible cable of the shearer,the equivalent elastic modulus of the cable conductor is obtained using differential geometry and material mechanics theory based on the tensile test of the strand,so as to simplify the complex strand structure of the cable conductor into an equal-section cylinder.The finite element model of the cable bending is constructed and the bending simulation and fatigue life analysis are carried out.The results show that the equivalent elastic moduli of the power core and ground core conductors of this type of cable are approximately 16.520 GPa and 18.230 GPa,respectively.The test value of the elastic modulus of the control core conductor strands is 24.432 GPa,and the equivalent elastic modulus gradually increases with the increase of the conductor stranded diameter ratio.When the bending radius of the cable is 6 times of its diameter,the bending stress values of the power core,ground core and control core conductor are 158.08 GPa,153.49 GPa and 168.31 GPa,respectively.The conductor stress gradually decreases from the bending constraint part to both ends.The fatigue lives of the power core,ground core and control core conductor are 5.99×10^(4),6.475×10^(4)and 5.152×10^(4),respectively.And the fatigue life distribution trend is consistent with the stress distribution.

关 键 词：采煤机电缆 股线拉伸试验 有限元 等效弹性模量 弯曲疲劳寿命 

分 类 号：TD611[矿业工程—矿山机电]