搭接长度对钢丝绳芯输送带接头承载能力影响的数值模拟  

Numerical simulation of the influence of lap length on the load-bearing capacity of steel wire rope core conveyor belt joints

作　　者：井庆贺 曹富荣 葛伦贵 王耀辉 胡兵 李靖宇 张笃学 于忠升 陈杰 JING Qinghe;CAO Furong;GE Lungui;WANG Yaohui;HU Bing;LI Jingyu;ZHANG Duxue;YU Zhongsheng;CHEN Jie(Zhalainuoer Coal Industry Co.,Ltd.,Manzhouli 021412,China;Huating Coal Industry Group Co.,Ltd.,Pingliang 744199,China;Huaneng Qingyang Coal Electricity Co.,Ltd.,Qingyang 745002,China;Huaneng Coal Technology Research Co.,Ltd.,Beijing 100071,China;Huaneng Yunnan Diandong Energy Co.,Ltd.,Qujing 655008,China;Shaanxi Mining Branch of Huaneng Coal Industry Co.,Ltd.,Xi'an 710032,China;Huaneng Coal Industry Co.,Ltd.,Beijing 100036,China;School of Mechanical Engineering,Liaoning Technical University,Fuxin 123000,China)

机构地区：[1]扎赉诺尔煤业有限责任公司,内蒙古满洲里021412 [2]华亭煤业集团有限责任公司,甘肃平凉744199 [3]华能庆阳煤电有限责任公司,甘肃庆阳745002 [4]华能煤炭技术研究有限公司,北京100071 [5]华能云南滇东能源有限责任公司,云南曲靖655008 [6]华能煤业有限公司陕西矿业分公司,陕西西安710032 [7]华能煤业有限公司,北京100036 [8]辽宁工程技术大学机械工程学院,辽宁阜新123000

出　　处：《工矿自动化》2023年第12期121-129,共9页Journal Of Mine Automation

基　　金：中国华能总部科技资助项目(HNKJ20-H48);2019年度辽宁省高等学校创新人才(理)项目(LR2019030)。

摘　　要：输送带接头区域钢丝绳的抽出力是衡量接头承载能力的重要指标。目前针对钢丝绳芯输送带接头的研究主要集中在接头的结构参数、硫化工艺及胶料的粘合性能,并没有指出搭接长度对接头承载能力的影响。为研究搭接长度对钢丝绳芯输送带接头承载能力的影响,以st1250型钢丝绳芯输送带为研究对象,取输送带接头处单根钢丝绳部分建立接头模型,采用双线型内聚力模型模拟钢丝绳与橡胶的胶接状态,并通过切向拉剪试验与法向拉伸试验获得模型参数。将双线型内聚力模型与钢丝绳-橡胶接触界面相结合,对接头单根钢丝绳从橡胶中脱粘抽出的损伤演化过程进行仿真分析,发现接头损伤演化过程分为线性加载、损伤萌生、损伤扩展与完全失效4个阶段,且接头损伤失效曲线与双线型内聚力模型牵引力-位移曲线具有较好的一致性,验证了双线型内聚力模型可较好地模拟钢丝绳芯输送带接头损伤失效过程。对不同搭接长度的接头模型进行了仿真,得出搭接长度为350~750 mm时,随着搭接长度增大,接头刚度总体呈非线性增大,接头橡胶所受最大剪应力呈递减趋势,从而确定了接头搭接长度范围应控制在350~750 mm。对不同钢丝绳直径下搭接长度对接头承载能力的影响进行了仿真,结果表明:钢丝绳抽出力随搭接长度增大总体呈非线性递增;钢丝绳直径越大,接头钢丝绳抽出力随搭接长度增大的涨幅越大。拟合得到了不同钢丝绳直径下接头搭接长度与单根钢丝绳抽出力之间的函数关系,为不同承载能力要求下接头搭接长度的合理化选择提供了理论依据。The drawing force of the steel wire rope in the joint area of the conveyor belt is an important indicator to measure the bearing capacity of the joint.At present,research on the joint of steel wire rope core conveyor belt mainly focuses on the structural parameters of the joint,vulcanization process,and adhesive performance of the rubber material.It has not pointed out the influence of lap length on the load-bearing capacity of the joint.To study the influence of lap length on the load-bearing capacity of steel wire rope core conveyor belt joints,the st1250 steel wire rope core conveyor belt is taken as the research object.A joint model is established by taking a single steel wire rope part at the conveyor belt joint.The bilinear cohesive zone model is used to simulate the bonding state between the steel wire rope and rubber.The model parameters are obtained through tangential tensile shear tests and normal tensile tests.By combining the bilinear cohesive zone model with the steel wire rope rubber contact interface,a simulation analysis is conducted on the damage evolution process of a single steel wire rope detached from rubber in a joint.It is found that the joint damage evolution process can be divided into four stages:linear loading,damage initiation,damage propagation,and complete failure.Moreover,the joint damage failure curve is consistent with the traction displacement curve of the bilinear cohesive zone model.It verifies that the bilinear cohesive zone model can effectively simulate the damage failure process of steel wire rope core conveyor belt joints.Simulation is conducted on joint models with different lap lengths.It is found that as the lap length increases from 350 mm to 750 mm,the overall stiffness of the joint shows a non-linear increase,and the maximum shear stress on the joint rubber shows a decreasing trend.Therefore,it is determined that the range of lap length should be controlled within 350 mm to 750 mm.The influence of lap length on joint bearing capacity under different wire rope diamete

关 键 词：钢丝绳芯输送带 接头 搭接长度 承载能力 内聚力模型 抽出力 

分 类 号：TD526[矿业工程—矿山机电]