Experimental Research On The Friction Mechanism And Finite Element Analysis Of Water Lubrication Uhmwpe Bearings

In this paper, the ultra-high molecular weight polyethylene material is selected as thematerial of bearing shell, it have good performance of resistance to friction and wear. Throughanalyzing the performance of hydrodynamic lubrication and isothermal EHL lubrication ofthe ultra-high molecular weight polyethylene material bearing when lubricated with seawater,numerical solution is obtained. Through making experiment, the tribological properties of theultra-high molecular weight polyethylene material under dry friction, wet lubrication,seawater lubrication is discussed.Firstly, through establishing model, the effect of speed and load on attitude angle、eccentricity and rise of temperature are analyzed in sea water lubrication condition.Secondly, water-lubricated bearings are used for the study. It can get the finite elementanalysis of water lubricated bearing with the ProE/Mechanica which can create differentmodels of bearing. The Ultra-high molecular weight polyethylene material is selected for thestudy. And we can observe the bearing stress and strain by changing the shape of differentgrooves. The results show: the shape of the arc-shaped grooves makes the trend of stress andstrain change more slowly and maintains the stability of the bearing easier. It also providessome reference for the design of the bearing.Finally, through the friction and wear experiment of the selected materials made by thedigital display type of the testing machine and the statistical analysis results by the orthogonalmethod, we can get the changes of the friction factor of ultra high molecular weightpolyethylene material in dry friction, wetting and sea water lubrication condition and theinfluence of friction coefficient in different lubrication conditions under the change of loadand speed.