论文:2019,Vol:37,Issue(5):977-982
引用本文:
张帅, 刘金祥, 周杨. Ti掺杂DLC膜对小型转子发动机摩擦损失的影响[J]. 西北工业大学学报
ZHANG Shuai, LIU Jinxiang, ZHOU Yang. A Research of Ti Doped DLC Housing on the Friction Loss in Small Wankel Rotary Engine[J]. Northwestern polytechnical university

Ti掺杂DLC膜对小型转子发动机摩擦损失的影响
张帅1, 刘金祥1, 周杨2
1. 北京理工大学 机械与车辆学院, 北京 100081;
2. 中国兵器工业导航与控制技术研究所, 北京 100089
摘要:
在小型转子发动机常用的球墨铸铁材料上沉积Ti掺杂DLC膜。测量该膜在径向密封片工作状态下的摩擦学性能,试验结果表明Ti掺杂DLC膜具有较低的摩擦因数。Ti掺杂DLC膜会提高镀膜区域表面硬度和表面质量。在小型转子发动机气缸上沉积Ti掺杂DLC膜,搭建小型转子发动机性能测试平台,测量倒拖工况和工作状态下小型转子发动机摩擦损失功率和输出功率。结果表明,转速从7 000~17 000 r/min,在倒拖工况下,Ti掺杂DLC膜气缸与径向密封片摩擦损失功率为15~38 W,摩擦损失功率是球墨铸铁气缸的68%。在工作状态下,与球墨铸铁相比,Ti掺杂DLC膜能够提高23~78 W的输出功率,小型转子发动机输出功率提高了24%~43%。
关键词:    Ti掺杂DLC膜    摩擦损失    小型转子发动机    径向密封片    性能测试    输出功率   
A Research of Ti Doped DLC Housing on the Friction Loss in Small Wankel Rotary Engine
ZHANG Shuai1, LIU Jinxiang1, ZHOU Yang2
1. School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China;
2. Navigation and Control Technology Institute of NORINCO Group, Beijing 100089, China
Abstract:
Ti doped DLC coating was deposited on ductile iron disk commonly used material in small Wankel rotary engine. The friction coefficient under the working condition of apex seal was investigated. The results show that the Ti doped DLC coating is of low friction coefficient. In addition, the surface hardness and the morphology were improved by Ti doped DLC coating. After that, the Ti doped DLC coating was deposited on the housing. A performance testing platform for small Wankel rotary engine was built. The effect of Ti doped DLC coating under motored and working conditions were measured. The results show that when the operation speed varies from 7 000 to 17 000 r/min, the friction loss between apex seal and Ti doped DLC coating ranges 15~38 W under motored condition. It is only 68% of the friction loss between apex seal and ductile iron. Under working condition, the coating increases 23~78 W of the engine output power, which can improve the output power of small Wankel rotary engine by 24%~43%.
Key words:    Ti doped DLC coating    friction loss    small Wankel rotary engine    apex seal performance testing    output power   
收稿日期: 2018-10-09     修回日期:
DOI: 10.1051/jnwpu/20193750977
通讯作者: 刘金祥(1975-),北京理工大学副教授,主要从事发动机结构疲劳研究。e-mail:liujx@bit.edu.cn     Email:liujx@bit.edu.cn
作者简介: 张帅(1988-),北京理工大学博士研究生,主要从事微小型转子发动机摩擦磨损研究。
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