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纳米润滑添加剂改善摩擦磨损提高发动机性能的研究
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国家重点研发计划项目(2016YFC0204905).


Improving Engine Performance Via the Addition of Nanolubricating Additives to Reduce Friction and Wear
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    摘要:

    以5W-30润滑油为基础油,Al2O3/TiO2为纳米添加剂,配制添加剂质量分数为2%的纳米润滑油。通过摩擦学性能试验台模拟缸套-活塞环摩擦副实际工作过程,研究Al2O3/TiO2纳米添加剂对摩擦学性能的改善;通过场发射扫描电镜(FESEM)对活塞环样本微观形貌进行观察,确定表面磨损情况;通过发动机台架实验研究确定实际使用工作过程中,纳米添加剂对发动机动力性能的影响。结果表明,润滑油中加入Al2O3/TiO2纳米添加剂后,缸套-活塞环摩擦副摩擦磨损性能得到明显改善,摩擦因数和活塞环磨损率显著下降,摩擦因数最大下降50.6%,平均下降42%;活塞环磨损率最大下降34.8%,平均下降27.2%;活塞环表面微观形貌得到明显改善,磨损表面得到修复,划痕显著减少;在转速为4 400 r/min时随着负荷逐渐增大,发动机台架实验输出功率最高提升24.2%,低负荷功率增幅显著,高负荷范围内功率平均提升3.3%,动力性能得到较大提升。

    Abstract:

    With 5W-30 lubricant as base oil and Al2O3/TiO2 as mixed nano additive,nano lubricating oil was prepared by adding 2% mass fraction of Al2O3/TiO2 in the lubricant.The influence of Al2O3/TiO2 nano additive on the tribological properties of the lubricant was study by using the tribological performance rig test to simulate the actual working process of cylinderpiston ring assembly.The surface wear condition was analyzed by using the field emission scanning electron microscopy (FESEM) to observe the morphology of piston ring sample.The influence of Al2O3/TiO2 nano additive on engine performance during the actual work process was studied by the engine bench test.The results show that the nano additive of Al2O3/TiO2 improves the friction and wear of cylinderpiston ring,and thefriction coefficient and the wear rate of piston ring is decreased significantly.The maximum decrease of friction coefficient is 50.6% and the average decrease is 42%,the maximum decrease of piston ring wear rate is 34.8% and the average decrease is 272%.The morphology of piston ring surface is improved and the worn surface is repaired and the scratches are significantly reduced.When the speed is 4 400 r/min,with the increasing of load,the output power of the engine bench test is up to 24.2%.The power in low load is increased significantly and the power in high load range is increased by 3.3%,the power performance is greatly improved.

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侯献军.纳米润滑添加剂改善摩擦磨损提高发动机性能的研究[J].润滑与密封,2018,43(6):1-5.
. Improving Engine Performance Via the Addition of Nanolubricating Additives to Reduce Friction and Wear[J]. Lubrication Engineering,2018,43(6):1-5.

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  • 在线发布日期: 2018-06-26
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