出油孔对螺旋油楔动静压滑动轴承性能的影响

Influence of the Outlet Hole on Performance of a Spiral Oil Wedge Hybrid Journal Bearing

针对当前制约动静压滑动轴承应用的温升问题,在对一种螺旋油腔动静压滑动轴承的动静态特性分析的基础上,设计了相应的实验装置,采用理论和实验的方法研究了轴承的出油孔对轴承静动态性能的影响。理论和实验结果均表明,出油孔的存在对油膜的压力分布仅有较小的影响,对承载力及动态性能的影响甚微,但却会大幅度增加轴承的出油量,通过出油孔流出轴承的润滑油量大约为端泄流量的十几倍,即通过出油孔能更多地带走摩擦产生的热量,更有利于轴承的温升降低。在需要降低轴承温升的应用中,在油腔中适当添加出油孔,并合理布置进出油孔的位置,可以实现对性能影响较小的情况下,大幅度降低轴承的温升。

Aimed at the problem of temperature rise in application of hybrid journal bearing, based on theoretical analysis of hydrodynamic performance on a spiral oil wedge hybrid bearing, a set of test-bed was developed, and the influence of outlet hole of the bearing on bearing performance was studied. The results show that the existence of outlet holes has little influence on bearing performances, including pressure distribution of oil film, load capacity and dynamic performance, but the outlet hole can increase the oil quantity greatly which flows out of the bearing, and the oil quantity flowing out of the bearing through outlet hole is about 10 times than the quantity through both ends of the bearing, that is to say, there is much quantity of heat brought out of the bearing through the outlet holes, which is useful for the temperature rise. In special application for temperature rise, the outlet holes can be appended and placed properly to oil cavities, which can decrease the temperature rise in great extent.