缠绕提升钢丝绳冲击摩擦特性研究

发布时间：2018-10-17 09:03

【摘要】：作为超深矿井提升的关键设备之一,缠绕式提升机依靠钢丝绳在滚筒上卷绕来保证其安全可靠运行,钢丝绳在滚筒上多层缠绕过程中层间接触摩擦副的摩擦特性直接影响其服役寿命。本课题在国家重点基础研究发展规划项目的资助下,开展了缠绕提升钢丝绳冲击摩擦特性研究,旨在能够掌握缠绕提升钢丝绳层间摩擦特性及损伤机理,为超深矿井缠绕提升机缠绕层数设计和保障缠绕提升钢丝绳安全运行提供基础数据。首先,理论分析了提升钢丝绳在滚筒上卷绕运动,掌握了钢丝绳多层卷绕排列形式、导向规律及钢丝绳间受力特征,得到了钢丝绳绕入冲击问题产生的原因。其次,针对缠绕提升钢丝绳层间冲击摩擦工况,研发了缠绕提升钢丝绳冲击摩擦试验台,先开展了钢丝绳无冲击摩擦试验,分析了干摩擦和油水混合介质润滑状态下钢丝绳摩擦因数、摩擦温升以及表面磨损形貌随载荷、相对滑移速度的变化规律,随后进行了层间钢丝绳冲击摩擦试验,对比分析了干摩擦和润滑状态下冲击摩擦因数和表面磨损形貌随冲击载荷、冲击速度和滑移速度的变化规律;结合钢丝绳接触区域表面磨损形貌,掌握了钢丝绳冲击摩擦损伤机理。最后,结合滚筒上缠绕提升钢丝绳间接触受力状态和材料属性,建立钢丝绳静力拉伸有限元模型,进行钢丝绳静力拉伸有限元仿真,掌握了钢丝绳应力应变分布规律;建立层间钢丝绳冲击有限元模型,对钢丝绳间冲击行为进行仿真,掌握了绳间冲击过程中钢丝绳等效应力和能量变化规律以及塑性应变情况;建立钢丝绳相对滑动有限元模型,对层间钢丝绳三维螺旋接触行为进行热-应力有限元仿真,掌握了钢丝绳滑动过程摩擦表面温升和等效应力变化规律;将试验结果与仿真结果进行对比分析,验证了有限元模型的合理性。
[Abstract]:As one of the key equipment of the ultra-deep mine hoist, the winding hoist relies on the wire rope to coil on the drum to ensure its safe and reliable operation. The friction characteristics of wire rope in multi-layer winding process directly affect its service life. With the aid of the national key basic research and development program, the research on the impact friction characteristics of winding hoisting rope is carried out in order to master the friction characteristics and damage mechanism of winding hoist rope layer. It provides the basic data for the design of winding layer number of super deep mine winding hoist and the safe operation of winding hoist wire rope. Firstly, the winding motion of hoisting wire rope on the drum is analyzed theoretically, and the multi-layer winding arrangement, the guiding law and the force characteristics between the wire ropes are mastered, and the causes of the impact problem of the wire rope winding are obtained. Secondly, according to the interlayer impact friction condition of winding hoist rope, the impact friction test rig of winding hoist rope is developed, and the non-impact friction test of wire rope is carried out first. Under the condition of dry friction and oil-water mixed medium lubrication, the friction coefficient, friction temperature rise and surface wear morphology of steel wire rope with load and relative slip velocity are analyzed, and then the impact friction test of interlaminar wire rope is carried out. The changes of impact friction coefficient and surface wear morphology with impact load, impact velocity and slip velocity under dry friction and lubrication were compared and analyzed. The mechanism of impact friction damage of wire rope is mastered. Finally, the finite element model of wire rope static tension is established, and the stress and strain distribution law of wire rope is grasped by finite element simulation of wire rope static tension, combined with the contact force state and material property of hoisting rope on roller. The finite element model of interlayer wire rope impact is established, and the impact behavior of wire rope is simulated. The law of equivalent stress, energy change and plastic strain of wire rope during the process of interlayer impact are grasped, and the relative sliding finite element model of wire rope is established. The three-dimensional spiral contact behavior of interlayer wire rope was simulated by thermo-stress finite element method, and the law of temperature rise and equivalent stress of friction surface during the sliding process of wire rope was mastered, and the results of test and simulation were compared and analyzed. The rationality of the finite element model is verified.
【学位授予单位】：中国矿业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TD532

【参考文献】