曲轴油封预涂润滑脂选型研究  

Research on Selection of Precoated Grease for Crankshaft Oil Seal

作　　者：高拚 周永亮 徐忠芳[1,2] 刘彬 姚祖怡 朱晨刚 史雪平 GAO Pin;ZHOU Yongliang;XU Zhongfang;LIU Bin;YAO Zuyi;ZHU Chengang;SHI Xueping(Wuxi Diesel Engine Factory,FAW Jiefang Automobile Co.,Ltd.,Wuxi 214026,China;FAW Jiefang Engine Business Division,Wuxi 214026,China)

机构地区：[1]一汽解放汽车有限公司无锡柴油机厂,江苏无锡214026 [2]一汽解放发动机事业部,江苏无锡214026

出　　处：《现代车用动力》2022年第1期44-52,共9页Modern Vehicle Power

摘　　要：通过机油相溶性、高温流动性、稳定性和抗积碳性、耐温安定性以及台架耐久强化试验、抗动态剪切试验、旋转扭矩试验的对比,评价各类润滑脂对曲轴油封前期旋转润滑的适用性。通过试验结果对比分析和市场验证,评价试验项目设置的合理性,进而建立曲轴油封预涂润滑脂的规范选型流程。结果表明:3#锂基润滑脂、LH-PW1015润滑脂和SPI-M润滑脂与机油相溶性差、抗积碳能力差,不适用于曲轴油封的前期旋转润滑。AS510润滑脂和GR374P润滑脂可以有效降低油封工作初期的旋转扭矩,在发动机正常工作后可以有效脱离密封唇,耐温安定性良好,适用于曲轴油封的前期润滑。经市场验证,更换为AS510润滑脂后,曲轴后油封最近10个月的年千台故障数(12MIS)降幅达35%,进一步验证选型的合理性。研究结果可以为优化曲轴油封预涂润滑脂选型设计提供指导。The suitability of various lubricating greases for early rotary lubrication of crankshaft oil seal was evaluated by systematic contrast such as oil solubility test,high temperature fluidity test,high temperature baking residue test,temperature stability test,bench durability enhancement test,dynamic shear resistance test and rotary torque test.Through comparative analysis of experimental results and market verification,the rationality of experimental project setting was evaluated,and then the standard selection process of pre-coated grease for crankshaft oil seal was established.The results show that 3 # lithium grease,LH-PW1015 grease and SPI-M grease are not suitable for the early rotary lubrication of crankshaft oil seal due to poor solubility in oil and poor anti-carbon deposition ability.AS510 grease and GR374P grease can effectively reduce the rotary torque of oil seal at the early stage of operation,and can effectively break away from the sealing lip after the normal operation of the engine.It has good temperature stability and is suitable for the early lubrication of crankshaft oil seal.After market verification,and after switching AS510 grease,the last month 12MIS of crankshaft rear oil seal has decreased by 35%,further verifying the rationality of selection.The research results can provide guidance for optimizing selection and design of precoated grease for crankshaft oil seal.

关 键 词：曲轴油封 润滑脂 机油相溶性 抗积碳 选型设计 

分 类 号：TK426[动力工程及工程热物理—动力机械及工程]