环境因素对步进摩擦系数的影响

Effects of Environmental Factors on Step Friction Coefficient

为了减少滑摔事故的发生率,结合常见的步进摩擦配副材料和工况条件,采用Mark Ⅱ止滑试验机研究了环境因素对步进摩擦系数的影响.结果表明:单一因素和因素间的相互作用对步进摩擦系数都有影响.在所有影响因素中,试验条件的影响最显著.干态下的摩擦系数最大,油态下的摩擦系数最小,且接近于零,其他几种润滑态的摩擦系数区别不大.因素之间的相互作用表明当试验条件一定时,上下试样的摩擦系数基本保持相同的变化趋势,但此规律会随试验条件的改变而发生变化.摩擦系数的变化归因于材料的表面特性和液体的润滑效应.

In order to decrease the probability of sliping and falling accidents,effects of environmental factors on step friction coefficient were studied on a Mark II slip meter,using common step friction couple materials as samples and several work conditions as test conditions.The result showed that all the factors including materials of frictional couple,test conditions and interactions between two factors had influences on step friction coefficient.Of all the factors,the effect of test conditions was the most significant one.Friction coefficient in dry condition was the highest while that in oil lubricated condition was the lowest and close to zero.Friction coefficients of lubricated conditions except for oil condition had no significant difference.The interactions between two factors indicated that friction coefficients of upper and lower samples kept the same trend when test condition was constant but this trend changed with test condition.The variation of friction-coefficients was attributed to the surface feature of materials and the lubrication effect of liquids.