吉林大学学报(工学版) ›› 2015, Vol. 45 ›› Issue (1): 22-28.doi: 10.13229/j.cnki.jdxbgxb201501004

• 论文 • 上一篇    下一篇

湿式离合器接合过程中的热弹性稳定性

赵家昕1,马彪1,李和言1,朱莉2,韩明2,朱礼安3   

  1. 1. 北京理工大学 机械与车辆学院,北京 100081;
    2. 中国北方车辆研究所 北京 100072;
    3. 江麓机电集团公司,湖南 湘潭 411100
  • 收稿日期:2013-05-06 出版日期:2015-02-01 发布日期:2015-02-01
  • 通讯作者: 李和言(1978),男,副教授,博士.研究方向:变速器设计、摩擦与润滑.E-mail:lovheyan@gmail.com
  • 作者简介:赵家昕(1983),男,博士研究生.研究方向:车辆离合器热弹性分析.E-mail:jiaxin1773@163.com
  • 基金资助:
    国家自然科学基金项目(51175042);基础产品创新计划项目(VTDP2102,VTDP3203);装备预先研究项目(40402070102).

Thermoelastic stability of wet clutches during engaging process

ZHAO Jia-xin1,MA Biao1,LI He-yan1,ZHU Li2,HAN Ming2,ZHU Li-an3   

  1. 1.School of Mechanical Engineering,Beijing Institute of Technology,Beijing 100081,China;
    2.Norinco Group China North Vehicle Research Institute, Beijing 100072,China;
    3.Norinco Group Jianglu Machinery and Electronics Group Company, Xiangtan 411100,China
  • Received:2013-05-06 Online:2015-02-01 Published:2015-02-01

摘要: 针对湿式离合器接合过程中的局部高温区及影响因素,利用热弹性不稳定性理论(TEI)进行了理论建模与分析。模型中考虑了材料表面粗糙度和混合润滑对摩擦副温度和压力的影响,分析了混合润滑状态下润滑区域与接触区域的比例以及油膜剪切热量与摩擦热量的比例。为了准确测量材料表面粗糙度,设计台架试验,利用表面形貌仪测试了对偶片表面形貌,分析了粗糙度在离合器不同使用阶段的变化规律。结果表明,当离合器接合转速超过临界值时,温度场分布出现明显的波动,高、低温区间隔分布。同时,指出了离合器摩擦材料参数(导热性、弹性)与结构参数(对偶片厚度)对稳定性的影响。

关键词: 车辆工程, 湿式离合器, 热弹性不稳定性, 表面粗糙度, 混合润滑, 局部高温区

Abstract: On the basis of Thermoelastic Instability (TEI) theory, a theoretical model is proposed to investigate the local hot zones and influence factors of wet clutches during engaging process. The effects of the surface roughness and the mixed lubrication on the temperature and pressure of the friction pair are considered. Under mixed lubrication, the ratios of the lubrication area to the contact area and the fluid shear velocity induced heat flux to the frictional heat flux are calculated. A plasmon resonance analyzer is used to investigate the variation of the surface roughness in different stages. The results show that strong inhomogenous temperature field, hot zones and cold zones appear when the clutch engaging speed exceeds the threshold. The material properties, such as thermal conductivity and elasticity, and structural properties, such as the thickness of the matting disk, significantly influence the stability of the system.

Key words: vehicle engineering, wet clutch, thermoelastic instability, surface roughness, mixed lubrication, hot spots

中图分类号: 

  • U463.2
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