Warmuth A R, Sun W, Shipway P H
Faculty of Engineering , University Technology Centre in Gas Turbine Transmission Systems, University of Nottingham , Nottingham NG7 2RD , UK.
R Soc Open Sci. 2016 Oct 19;3(10):150637. doi: 10.1098/rsos.150637. eCollection 2016 Oct.
This paper investigates the effect of contact geometry, temperature and displacement amplitude on the fretting behaviour of an aero-turbo oil lubricated cylinder-on-flat contact. To be effective, the lubricant needed both to penetrate the contact and then offer protection. Lubricant penetration into the fretting contact is found to be controlled by two physical parameters, namely (i) the width of the contact that remains covered throughout the fretting test and (ii) the lubricant viscosity. The protection offered by the lubricant (assuming that it has successfully penetrated the contact) is influenced by four physical parameters, namely (i) lubricant viscosity, (ii) traverse velocity, (iii) nominal contact pressure, and (iv) chemical effects. The relationship between the three experimental parameters which were varied in the programme of work (temperature, fretting displacement and cylinder radius) and physical parameters which influence the protection offered by the lubricant film can be competing, and therefore complex wear behaviour is observed. The roles of the various parameters in controlling the wear behaviour are presented in a coherent physical framework.
本文研究了接触几何形状、温度和位移幅值对航空涡轮机油润滑平面圆柱接触微动行为的影响。为了发挥作用，润滑剂既需要渗入接触区域，又要提供保护。研究发现，润滑剂渗入微动接触区域受两个物理参数控制，即：（i）在整个微动试验过程中保持覆盖的接触宽度；（ii）润滑剂粘度。润滑剂提供的保护作用（假设其已成功渗入接触区域）受四个物理参数影响，即：（i）润滑剂粘度；（ii）横向速度；（iii）名义接触压力；（iv）化学作用。在工作方案中变化的三个实验参数（温度、微动位移和圆柱半径）与影响润滑膜提供保护作用的物理参数之间的关系可能相互矛盾，因此观察到复杂的磨损行为。在一个连贯的物理框架中阐述了各种参数在控制磨损行为中的作用。
