固体颗粒分布对轴承润滑的影响

Effects of Solid Particles Distribution on Bearing Lubrication

基于格子-波兹曼方法 (LBM)理论,分析含固体颗粒的轴承润滑问题。通过建立润滑油的理论离散模型,分析固体颗粒分布对于油膜压力、润滑油流速的影响。分析结果表明:在油膜厚度方向分布的固体颗粒越多,颗粒的分布形式对润滑油流动的阻碍能力越强,则其对于油膜压力及油膜流动的影响也越大;当分布形式相同时,固体颗粒个数越多对油膜压力的影响越大;即润滑油中所含固体颗粒浓度越大,对润滑的影响程度也越大;无论分布形式如何,固体颗粒对于离颗粒较远的下游区域的速度影响较小。

The bearing lubrication with solid particles in the oil was studied by the Lattice Boltzmann method. The theoretical discrete model of lubricating oil was set up,and the effects of the distribution of particles on the oil film pressure and oil film velocitywas analyzed. It is shown that the more the particles distributed in film thickness direction,the more significantly the distribution of particles hinders the flow of the lubricating oil,the greater the influence on the oil film pressure and the flow of the oil film by the distribution of particles. For a certain distribution of particles,the more the particles in the oil,the more significantly they affect the film pressure. The effects of solid particles distribution on the oil velocity are not obvious at the region far away from particles.