Chang Xiang-Dong, Peng Yu-Xing, Zhu Zhen-Cai, Gong Xian-Sheng, Yu Zhang-Fa, Mi Zhen-Tao, Xu Chun-Ming
School of Mechanical and Electrical Engineering, China University of Mining and Technology, Xuzhou 221116, China.
Jiangsu Key Laboratory of Mine Mechanical and Electrical Equipment, China University of Mining & Technology, Xuzhou 221116, China.
Materials (Basel). 2017 Jun 9;10(6):630. doi: 10.3390/ma10060630.
Friction and wear behavior exists between hoisting ropes that are wound around the drums of a multi-layer winding hoist. It decreases the service life of ropes and threatens mine safety. In this research, a series of experiments were conducted using a self-made test rig to study the effects of the strand lay direction and crossing angle on the winding rope's tribological behavior. Results show that the friction coefficient in the steady-state period shows a decreasing tendency with an increase of the crossing angle in both cross directions, but the variation range is different under different cross directions. Using thermal imaging, the high temperature regions always distribute along the strand lay direction in the gap between adjacent strands, as the cross direction is the same with the strand lay direction (right cross contact). Additionally, the temperature rise in the steady-state increases with the increase of the crossing angle in both cross directions. The differences of the wear scar morphology are obvious under different cross directions, especially for the large crossing angle tests. In the case of right cross, the variation range of wear mass loss is larger than that in left cross. The damage that forms on the wear surface is mainly ploughing, pits, plastic deformation, and fatigue fracture. The major wear mechanisms are adhesive wear, and abrasive and fatigue wear.
多层缠绕式提升机卷筒上缠绕的提升钢丝绳之间存在摩擦磨损行为。这会降低钢丝绳的使用寿命并威胁矿山安全。在本研究中，使用自制试验台进行了一系列实验，以研究捻距方向和交叉角对缠绕钢丝绳摩擦学行为的影响。结果表明，在两个交叉方向上，稳态期的摩擦系数均随交叉角的增大呈下降趋势，但不同交叉方向下的变化幅度不同。利用热成像技术发现，当交叉方向与捻距方向相同时（右交叉接触），高温区域总是沿相邻股线之间的间隙中的捻距方向分布。此外，在两个交叉方向上，稳态期的温度升高均随交叉角的增大而增加。不同交叉方向下磨损痕迹形态的差异明显，尤其是对于大交叉角试验。在右交叉情况下，磨损质量损失的变化幅度大于左交叉。磨损表面形成的损伤主要有犁沟、凹坑、塑性变形和疲劳断裂。主要磨损机制为粘着磨损、磨粒磨损和疲劳磨损。
