friction pulley

基本解释

Pulley and pull rod can be moved easily without friction noise, and can be positioned anywhere;
滑轮拉杆，移动灵活，无摩擦响声，可于任意位置定位；
It shows that the elastic modulus and the molecular component of friction coefficient of the pulley material have great influence on the wear resistance of wire rope.
结果表明，绳轮材料的弹性模量和摩擦系数分子分量，对钢丝绳耐磨性能有很大影响。
So, in the static state, because of the self-locking phenomenon arose by friction, no matter how exert heavy axial force on pulley it is impossible to make the work radius of the belt changed;
这样，在静止时，由于摩擦产生自锁，在带轮轴向无论施加多大的力，也无法使皮带工作半径变化；