结构参数对转盘轴承承载与润滑性能的影响

Effect of Structural Parameters on Loading Capacity and Lubrication Performance of Slewing Bearing

转盘轴承的承载和润滑性能是判断其能否满足主机需求的关键指标。以低速重载交叉滚柱式转盘轴承为研究对象,综合ADAMS动力学仿真与弹流润滑理论研究了接触角、滚动体直径和数量等结构参数对转盘轴承承载和润滑性能的影响。结果表明:随着接触角的增大,最大接触载荷和膜压逐渐减小,而膜厚逐渐增大,因此适当增大接触角可以提高转盘轴承的承载和润滑性能。随着滚动体直径的增大与数量的减少,最大接触载荷逐渐增大而最大接触应力逐渐减小,膜厚逐渐增大,膜压逐渐减小,因此在转盘轴承设计中,应综合考虑承载和润滑性能两方面的因素确定合适滚动体直径和数量。

The loading capacity and lubrication performance of the slewing bearing are the key indexes to judge whether it can meet the requirements of the whole machine.By taking the low speed and heavy load cross-roller slewing bearing as the research object,effect of structural parameters such as contact angle,diameter and number of rollers on loading capacity and lubrication performance were studied based on ADAMS dynamic simulation and elastohydrodynamic lubrication theory.The result showed that with the increase of the contact angle,the maximum contact load and the oil film pressure decrease gradually,while the oil film thickness increases gradually.Therefore,appropriately increasing of the contact angle can improve the loading capacity and lubrication performance of the slewing bearing.With the increase of diameter and the decrease of the number of the roller,the maximum contact load increases and the maximum contact stress decreases gradually,the oil film thickness increases gradually,and the oil film pressure decreases gradually.Therefore,the loading capacity and lubrication performance should be taken into comprehensive consideration to determine the appropriate bearing diameter and number in the design of the slewing bearing.