汽车等速万向节润滑脂的研制

Research on Automobile Constant Velocity Joint Grease

汽车等速万向节连接变速箱和车轮以传递动力,用润滑脂润滑。研制一款低温转矩(包括启动转矩和运转转矩)小,摩擦因数低及极压抗磨性能好的汽车等速万向节润滑脂。通过对稠化剂,基础油和添加剂的考察,汽车等速万向节润滑脂由75%~90%的调合基础油(加氢基础油+合成烃+合成酯),聚脲稠化剂,0.5%~2.0%的胺型抗氧剂,0.3%的苯三唑衍生物抗腐蚀剂及复合极压抗磨剂(2.0%有机锌盐+1.0%含磷剂+1.0%有机钼盐+1.0%含硫剂)组成。研制的汽车等速万向节润滑脂-40℃启动转矩为0.38 N·m,-40℃运转转矩为0.05 N·m,SRV摩擦因数为0.076,最大无卡咬负荷1177 N,烧结负荷3090 N,四球磨斑直径0.38 mm,达到了拟定的研制目标。

The automobile constant velocity joint connected the gearbox and wheels to transmit power and was lubricated with grease.An automobile constant velocity joint grease with low temperature torque (including starting torque and running torque),low frictional coefficient and excellent extreme pressure/antiwear performance was developed.Through the investigation of thickeners,base oils and additives,automobie constant velocity joint greases were blended base oil (hydrogenated base oil + synthetic hydrocarbon + synthetic ester) from 75% to 90% ,polyurea thickener, 0.5% to 2.0% amine antioxidant,0.3% benzotriazole derivative corrosion inhibitor and complex extreme pressure/antiwear additive (2.0% organic zinc salt + 1.0% phosphorus additive + 1.0% organic molybdenum salt + 1.0% sulfur-containing additive ).The developed automobile constant velocity joint grease had a starting torque of 0.38 N-m at -40 ℃ ,a running torque of 0.05 N .m at -40 ℃ ,a frictional coefficient of 0.076 for SRV ,last nonseizure load of 1177 N ,and wdd load 3090 N ,four-ball worn scar diameter of 0.38 mm,and reached the proposed development goal.