摘要
针对重载传动钢丝绳在服役过程中存在的摩擦磨损和性能退化问题,利用自制钢丝绳-滑轮摩擦磨损试验机和力学性能测试装置,揭示钢丝绳摩擦特性和磨损特征演化机理,分析不同磨损对钢丝绳剩余抗拉强度和弯曲疲劳寿命的影响规律.结果表明:摩擦系数随滑动距离呈减小趋势,其演变过程受钢丝绳结构影响明显,相对稳定阶段摩擦系数约为0.65;摩擦温升增速先快后慢,最大温升为65℃左右;磨损形貌特征以犁沟、剥落和塑性变形为主,磨损机理主要是黏着磨损和磨粒磨损;磨损钢丝绳剩余强度和弯曲疲劳断丝率随滑动距离增大均呈非线性退化趋势,最大破断力从49.6 kN减小到42 kN;最大弯曲疲劳次数从10708非线性递减至4070;磨损造成钢丝拉伸塑性减小,加速弯曲疲劳裂纹扩展,且钢丝在2种工况下的断裂机理分别为韧性断裂和脆性断裂.
Friction and wear between heavy-load transmission wire ropes and sheaves are inevitable during service.The wear evolution leads performance degradation of the wire rope.This greatly reduces the service safety and reliability of the transmission system equipment,and threatens the life and property safety of operators.Therefore,it is necessary to investigate the sliding tribological properties between the wire rope and the sheave,and to reveal the influence of surface wear on the degradation of mechanical properties of the rope.Although many scholars have been carried out a large number of studies on the wear of wire rope,those mainly focus on the fretting wear between internal wires and the sliding wear between wire ropes.Additionally,few studies on mechanical properties of the wire rope with different surface wear were conducted.There is still a certain gap between the existing research and the actual service conditions of transmission wire rope,which cannot provide guidance for accurate evaluation of the service state of wire ropes.With the aim to study the evolution mechanism of friction and wear characteristics of wire rope,the friction and wear experiments between wire rope and sheave under different sliding distance were carried out using a homemade test rig.Then,the breaking tensile tests and bending fatigue tests of the rope sample with different surface wear were conducted by customized experimental apparatus for mechanical properties of the wire rope.For the friction characteristics,the variations of the friction coefficient and friction temperature rise were obtained by the data acquisition system and an infrared thermal imaging instrument,respectively.For the wear characteristics,the distribution characteristics and size parameters of the wear scars of the wire rope were analyzed by an optical microscope.Additionally,the wear morphology mechanisms were studied by a scanning electron microscope(SEM).Furthermore,the influences of different surface wear states on residual tensile strength and bending fati
作者
常向东
彭玉兴
朱真才
程德强
卢昊
唐玮
CHANG Xiangdong;PENG Yuxing;ZHU Zhencai;CHENG Deqiang;LU Hao;TANG Wei(School of Mechatronic Engineering,China University of Mining and Technology,Jiangsu Xuzhou 221116,China;Jiangsu Province and Education Ministry Co-Sponsored Collaborative Innovation Center of Intelligent Mining Equipment,Jiangsu Xuzhou 221116,China;Jiangsu Key Laboratory of Mine Electromechanical Equipment,Jiangsu Xuzhou 221116,China;School of Information and Control Engineering,China University of Mining and Technology,Jiangsu Xuzhou 211116,China)
出处
《摩擦学学报》
EI
CAS
CSCD
北大核心
2023年第12期1393-1405,共13页
Tribology
基金
国家自然科学基金项目(52005272,51975572)
江苏高校优势学科建设工程项目(PAPD)
江苏高校品牌专业建设工程项目(TAPP)资助。
关键词
传动钢丝绳
滑动摩擦
磨损演化
破断拉伸
弯曲疲劳
transmission wire rope
sliding friction
wear evolution
breaking tensile
bending fatigue
