摘要
介绍了所研制的重载摩擦磨损试验机的工作原理及其性能特点 ,在摆动频率 5 .3min- 1 和摆角± 30°条件下测试了聚四氟乙烯 (PTFE)编织复合材料关节轴承承载力及摩擦的时间效应 ,在 135 MPa承载力下测试了轴承的磨损和温升以及摩擦系数随连续摆动时间变化的关系 ,并通过扫描电子显微镜观察分析了轴承失效机理 .结果表明 :该关节轴承承载力可达到 135 MPa,摩擦系数小且稳定 ;在摆动过程中 PTFE不断被挤出 ,使轴承自润滑功能下降 ,从而导致编织基体材料发生磨损 .
The working principle and features of a heavy load friction and wear tester with a maximum load of 1000 kN and wide range of controllable velocity is introduced. The friction and wear behavior and the bearing capacity of a spherical bearing made of bearing steel reinforced with polytetrafluoroethylene (PTFE) fabric on the inner spherical plane were examined on the tester at an oscillating frequency of 5.3 min -1 and an oscillating angle of ±30°. The friction time effect of the bearing was investigated, and the wear failure mechanism analyzed as well based on observation of the worn surfaces with a scanning electron microscope. Moreover, the temperature rising of the bearing in a continuous swaying test was explored. It was found that the bearing showed good self lubricity and recorded gradually decreased friction coefficient in a extended swaying test. The increased wear of the bearing at an extended test duration was attributed to the extrusion and peeling off of the transferred PTFE. Owing to the excellent self lubricity and large heat dissipation capacity, the bearing was able to operate smoothly even when the wear depth came to a larger value at an extended test duration.
出处
《摩擦学学报》
EI
CAS
CSCD
北大核心
2003年第1期72-75,共4页
Tribology
基金
福建省产学研科技项目
关键词
聚四氟乙烯自润滑编织复合材料
关节轴承
自润滑材料
摩擦磨损性能
polytetrafluoroethylene fabric composite
spherical bearing
self lubricating material
friction and wear behavior
