Observation of Oil Reservoir Patterns under Cyclic Loading
To simulate the flow pattern of lubricant as the rolling elements enter and leave the contact area,a reciproca-ting unit was used to realize the cyclic loading imposed on the ball on disc contacts.Using the optical film thickness meas-urement method,the influence of oil supply amount,entrainment speed,and loading period on the oil reservoir patterns were observed under cyclic loading conditions.The results show that a closed oil reservoir pattern is formed at low speed.The dimensionless inlet distance and side reservoir width reduce with the increase in loading,indicating the reduction in oil replenishment.As speed becomes larger,the increase in loading and decrease in loading period will result in early rupture of the rear oil reservoir.The two oil reservoir tails will merge in the process of unloading.At high speeds,the reservoir pat-tern will present a separated state and fully starvation contacts.The effect of rolling track overlap will improve lubricant re-plenishment and lubrication state to some extent.
cyclic loadingoil reservoir patterninlet distancecavitationlubrication states
NETL
NSTL
万方数据
维普
