高转速下轴承腔内壁油膜流动建模

结合国外已有试验工作,提出描述轴承腔壁面油膜运动的分析模型,并进行若干工况条件的影响分析.研究结果表明,轴承腔中油膜流动具有累积特点,表现出在排出口之间油膜厚度逐渐增大;旋转件转速的增加减小了壁面油膜厚度,但却提高了油膜平均速度;随着入口滑油流量的增加,壁面油膜厚度和平均速度都随之增加.理论分析及其与试验工作的比较都表明,提出的基于试验研究预测轴承腔中油膜运动物理状态的方法,对于在有限试验条件下研究轴承腔中壁面油膜运动机理、继而开展轴承腔内传热分析和润滑分析,是有价值的技术途径.

Flow modeling of oil film on bearing chamber wall at high-speed

The analysis model of oil film movement in the bearing chamber wall was proposed based on the experimental work abroad, and carried out the impact analysis of some operation conditions. The results show that the flow of oil film with cumulative characteristics in bearing chamber, the film thickness increase between two exports; The increase in speed reduce the film thickness, but it increase the mean velocity of oil film; With the increase of the intake volume flow, thickness and mean velocity of oil film increase. Theoretical analysis and comparison with the experimental work show that the proposed method of prediction physical movement of oil film that based on the experiment in bearing chamber, for the study of movement mechanism of oil film in bearing chamber wall under a limited experimental work, and then carry out thermal analysis and lubrication analysis of bearing chamber, which is the valuable technical means.