极端工况下不同水润滑轴承材料摩擦磨损性能对比研究
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摘要
在干摩擦工况下模拟水润滑膜严重破坏的极端情况,研究未经改性聚四氟乙烯(PTFE)、超高分子量聚乙烯(UHMWPE)和聚醚醚酮(PEEK)3种材料在不同转速和载荷下的摩擦磨损性能。结果表明:干摩擦工况下UHMWPE材料具有优异的耐磨性和良好的自润滑性能,压力对摩擦因数影响比转速大;PTFE材料具有稳定的摩擦因数,压力和转速对摩擦因数影响明显,耐磨性较差;PEEK材料摩擦因数较大,且相对容易受转速和压力变化的影响,但具有良好的耐磨性能。综合分析,在极端工况下UHMWPE的适应能力最好,PEEK次之, PTFE最差。
By simulating the extreme conditions of severe damage of water lubrication film under dry friction condition,the friction and wear properties of three kinds of unmodified materials(PTFE,UHMWPE,PEEK) were studied under different speeds and loads.The results show that UHMWPE material has excellent wear resistance and good self-lubricating property under dry friction condition,and the pressure has a greater influence on friction coefficient compared with the rotating speed.The friction coefficient of PTFE material is stable under dry friction condition,and is obviously related to pressure and speed,but it shows poor antiwear property.The friction coefficient of PEEK material is large,and is relatively easy to be affected by the change of speed and pressure,but it good antiwear property under dry friction condition.Through comprehensive analysis,it can be concluded that under extreme conditions,the adaptability of UHMWPE is the best,followed by PEEK and PTFE.
By simulating the extreme conditions of severe damage of water lubrication film under dry friction condition,the friction and wear properties of three kinds of unmodified materials(PTFE,UHMWPE,PEEK) were studied under different speeds and loads.The results show that UHMWPE material has excellent wear resistance and good self-lubricating property under dry friction condition,and the pressure has a greater influence on friction coefficient compared with the rotating speed.The friction coefficient of PTFE material is stable under dry friction condition,and is obviously related to pressure and speed,but it shows poor antiwear property.The friction coefficient of PEEK material is large,and is relatively easy to be affected by the change of speed and pressure,but it good antiwear property under dry friction condition.Through comprehensive analysis,it can be concluded that under extreme conditions,the adaptability of UHMWPE is the best,followed by PEEK and PTFE.
引文
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[4]王家序,陈战,秦大同.水润滑塑料轴承的摩擦性能研究[J].机械工程材料,2002,26(11):36-38.WANG J X,CHEN Z,QIN D T.Friction and wear characteristics of bearings under water lubrication[J].Materials for Mechanical Engineering,2002,26(11):36-38.
[5]UNAL H,MIMAROGLU A,KADOGLU U,et al.Sliding friction and wear behaviour of polytetra-fluoroethylene and its composites under dry conditions[J].Materials and Design,2004,25(3):239-245.
[6]CHEN S,LI J,WEI L,et al.Tribological properties of polyimidemodified UHMWPE for bushing materials of seawater lubricated sliding bearings[J].Tribology International,2017,115:470-476.
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[8]楚婷婷,李媛媛,孙小波,等.聚醚醚酮/聚四氟乙烯复合水润滑轴承材料性能研究[J].轴承,2015(5):35-37.CHU T T,LI Y Y,SUN X B,et al.Study on performance for PEEK/PTFE composite used in water lubricated bearings[J].Bearing,2015(5):35-37.
[9]贾晓梅,王黎钦,应丽霞,等.PTFE基复合材料在干摩擦和液氮介质中的摩擦磨损性能研究[J].摩擦学学报,2007,27(2):181-186.JIA X M,WANG L Q,YING L X,et al.Friction and wear behavior of PTFE-based composites under dry sliding and in liquid nitrogen[J].Tribology,2007,27(2):181-186.
[10]李恩重,徐滨士,王海斗,等.玻璃纤维增强聚醚醚酮复合材料在水润滑下的摩擦学性能[J].材料工程,2014(3):77-82.LI E Z,XU B S,WANG H D,et al.Tribological property of polyetheretherketone composites reinforced with glass fiber under water lubrication[J].Journal of Materials Engineering,2014(3):77-82.
[11]林有希,高诚辉,李圆.CaCO3晶须和PTFE对PEEK干摩擦性能的影响[J].材料研究学报,2007,21(6):643-648.LIN Y X,GAO C H,LI Y.Effect of CaCO3whisker and PTFEon dry friction behavior of PEEK[J].Chinese Journal of Materials Research,2007,21(6):643-648.
[12]UNAL H,MIMAROGLU A.Friction and wear behaviour of unfilled engineering thermoplastics[J].Materials and Design,2003,24(3):183-187.