高速高温下发动机纳米铜润滑材料的摩擦学行为

Tribology behavior of engine nano-cu lubricating material at a condition of high speed and temperature

针对发动机在高速、高温等苛刻条件下,零部件表面因磨损而导致装备失效的难题,对纳米铜润滑材料的摩擦学行为进行研究,采用摩擦磨损试验机测试该材料在高速和不同温度条件下的摩擦学性能,并用扫描电镜分析纳米铜润滑材料的修复性能。结果表明:自制纳米铜润滑材料在高温高速条件下具有良好的抗磨减摩性能,在试验温度140℃时,能够使50CC润滑油的摩擦因数降低20.5%,磨斑直径降低24.6%,摩擦表面温度降低26.6%,同时表现出良好的修复性能。模拟发动机台架考核试验表明,高速运行下,在15W/40CD润滑油中添加纳米铜润滑材料能使发动机的摩擦功降低2.4%,发动机功率提高3.6%。

Aiming at the difficult problem about equipment failure because of wear of engine element surface on the high speed and temperature or other rigor working condition, the tribology behavior of nano-Cu lubricating material has been researched and explored. The tribological performances of nano-Cu lubricating material are tested on the condition of high speed and temperature by friction wear test machine. The repairing performance of nano-Cu lubricating material is analyzed by SEM. The results indicate that the nano-Cu lubricating material has outstanding tribology behavior on the running condition of high speed and temperature. When the testing temperature is 140℃, the nano-Cu lubricating material can make the friction coefficient, worn speckle diameter and worn surface temperature reduce 20.5%, 24.6% and 26.6% respectively, and put out good repairing performance. Simulation examination exhibited that compound lubricating material with nano-Cu can make the frictional work reduce 2.4% and the enging power increase3.6%.