UHMWPE基水润滑轴承摩擦及润滑特性的试验研究

针对纤维填料改性UHMWPE水润滑轴承的摩擦磨损性能进行研究。在平面摩擦磨损试验机上对玻璃纤维及碳纤维填料对UHMWPE复合材料摩擦性能进行试验,并分析GF-CF-UHMWPE材料与Thordon SXL材料在干摩擦、水润滑工况下的摩擦因数及磨损量。最后,采用径向水润滑轴承试验台对比研究了GF-CF-UHMWPE轴承和Thordon SXL轴承在不同载荷下摩擦因数随转速的变化规律。结果表明:纤维填料能显著增强UHMWPE的减摩性和耐磨性,GF-CF-UHMWPE材料具有更好的耐温性能,线性热膨胀系数也显著减小;GF-CF-UHMWPE轴承具有相同载荷下启动转速低,启动摩擦因数小的特性。

Experimental Study on Friction and Lubrication Performance of UHMWPE Based Water Lubricated Bearings

The friction and wear properties of water-lubricated UHMWPE bearing materials modified with fiber fillers are studied.A friction and wear tester is used to study the influence of glass fiber and carbon fiber fillers on the tribological behavior of UHMWPE composites,and a comparative study of the friction coefficient and wear rate of GF-CF-UHMWPE and Thordon SXL under dry friction and water lubrication conditions is conducted.Finally,using a water-lubricated journal bearing test rig,the variation of the friction coefficient with rotational speed of GF-CF-UHMWPE bearings and Thordon SXL bearings under different loads is comparatively studied.The results show that the fiber fillers can significantly reduce the friction coefficient and wear rate of UHMWPE.GF-CF-UHMWPE material has better heat resistance and lower linear thermal expansion coefficient.In addition,GF-CF-UHMWPE bearings have low starting rotational speed under same load and low starting friction coefficient.