缠绕提升钢丝绳绕入冲击摩擦特性研究

为掌握多层缠绕提升钢丝绳层与层之间滑动摩擦磨损特性,在自制缠绕式矿井提升机钢丝绳层间摩擦试验台上,以6×19热镀锌钢丝绳为研究对象,对不同载荷、滑移速度、冲击速度下钢丝绳滑动摩擦磨损规律及接触区域温升变化规律进行试验探究.研究结果表明:摩擦系数变化分为快速增长阶段、过渡阶段、稳定阶段;摩擦系数随载荷增加小幅减小,随滑移速度增大总体呈降低趋势;缠绕钢丝绳滑动摩擦温升集中于接触区域,最大温升受滑移速度影响明显,随速度增加而增大;冲击摩擦系数明显低于稳定滑动摩擦系数,最大冲击摩擦系数随冲击速度、滑移速度增大而增大,随着冲击载荷增大出现多次冲击摩擦.

Winding-in Impact Friction Characteristics of Wire Rope in Winding Hoist

In order to obtain the fretting friction and wear mechanims of wire rope among layers in the winding hoist, an impact friction test bench for hoisting rope is designed. A series of sliding friction experiments were carried out. The 6×19 hot-dipped galvanized rope was selected to explore the sliding friction and wear behaviour of wire rope and the temperature change rules of rope''s contact area under different contact loads, relative sliding velocities and impact velocities. The results show that the coefficient of friction (COF) of wire rope experienced the stages of rapid growth, slowly increase and stationary fluctuation over time. The COF decreased slightly with the increase of load. Moreover, the COF decreased obviously with the increase of sliding velocity. In addition, the temperature-rise was confined on the contact area and it increased as the sliding velocity increased. Furthermore, the maximum coefficient of impact friction was significantly lower than the coefficient of stable contact friction. With the increase of impact velocity and sliding velocity, the maximum coefficient of impact friction experienced a slight increase. By increasing the impact load, the number of impact friction increased.