期刊
WEAR
卷 380-381, 期 -, 页码 52-58出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.wear.2017.03.008
关键词
Porous polyimide; Retainer of rolling bearing; Porosity; Lubricating performance; Starved lubrication
资金
- National Nature Science Foundation of China [51675268]
- Fundamental Research Funds for the Central Universities [NZ2016106]
- Foundation of Graduate Innovation Center in NUAA [kfjj20150504]
The current work examines the lubricant retaining effect of porous polyimide (PI) on the performance of rolling bearings under starved lubrication conditions. PI with four different porosities were prepared by cold pressing and sintering processes The oil-containing and oil-supply properties as well as frictional properties were investigated. Then, PI was used as the retainer for a commercial thrust ball bearing with a race diameter of 18.7mm. Room temperature tests of retainer performance were conducted with an axial load of 500 N under starved lubrication, in which only residual oil on and in the retainer could work for lubrication. Experimental results show that oil-containing porous PI can easily release oil mainly by thermal expansion rather than centrifugation. Lubrication failure happened quickly with a compact retainer at starved lubrication whereas the bearings with oil-containing porous retainers operated smoothly for 12 h at 800 rpm and 5 h at 1200 rpm. Friction reduction and cooling effects are even more obvious with increased porosity. (C) 2017 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据