• CN:11-2187/TH
  • ISSN:0577-6686

机械工程学报 ›› 2019, Vol. 55 ›› Issue (21): 98-107.doi: 10.3901/JME.2019.21.098

• 摩擦学 • 上一篇    下一篇

环面接触复层多孔轴承热流体动压润滑性能及生/传热机制分析

张国涛1, 童宝宏1, 尹延国2, 解挺2   

  1. 1. 安徽工业大学机械工程学院 马鞍山 243000;
    2. 合肥工业大学摩擦学研究所 合肥 230009
  • 收稿日期:2018-11-25 修回日期:2019-06-21 出版日期:2019-11-05 发布日期:2020-01-08
  • 作者简介:张国涛,男,1986年出生,博士,讲师。主要研究方向为多孔轴承传热传质与流体润滑,功能表面与自润滑材料减摩改性。E-mail:hfutt@sina.com
  • 基金资助:
    国家自然科学基金(51575151,51975005)和安徽省自然科学基金(1908085QE195)资助项目。

Analysis of Thermo-hydrodynamic Lubrication Performance and Heat Generating/transfer Mechanism of Ring-face Contact Bilayer Oil Bearing

ZHANG Guotao1, TONG Baohong1, YIN Yanguo2, XIE Ting2   

  1. 1. School of Mechanical Engineering, Anhui University of Technology, Maanshan 243000;
    2. Institute of Tribology, Hefei University of Technology, Hefei 230009
  • Received:2018-11-25 Revised:2019-06-21 Online:2019-11-05 Published:2020-01-08

摘要: 为分析热效应对多孔环面接触复层含油轴承流体润滑性能的影响,建立环面接触复层含油轴承系统的热流体动压润滑模型,数值分析轴承系统的温度场及速度场分布,讨论考虑热效应时的复层含油轴承流体润滑问题及其生热、传热机制。结果表明:从轴承底面到摩擦对偶面,温度呈先升高后降低趋势,径向上温度随着半径增加而升高,系统的最高温度位于油膜区外环面上的最小膜厚处;轴承系统中的热量主要由油膜相对剪切发生,周向相对运动速度是系统生热的主要影响因素,温度与周向速度的分布形态相似,油膜产生的热量通过对流换热逐渐向多孔轴承中传导,轴承表层厚度或渗透率降低,对流换热效果变差,轴承系统中温度升高,热效应对润滑性能的影响变大;考虑热效应后,油膜润滑性能变差,但数值分析精度提高,数值结果更接近试验实测值。

关键词: 环面摩擦副, 复层含油轴承, 多孔, 热效应, 润滑特性

Abstract: To analyze the thermal effect on the lubricating performance of bilayer oil bearing with ring-face contact style, the thermo-hydrodynamic lubrication model of the bearing is established. The temperature and velocity field distribution are analyzed numerically. The problem of the thermo-hydrodynamic lubrication and the mechanism of heat generation and transfer of the bilayer oil bearing are discussed. Results show that:from the bottom to the surface of the bearing, the temperature rises first and then decreases. The larger the radius, the higher the temperature will be. The maximum temperature of the system is located at the minimum film thickness of the outer ring surface in the oil film region. The heat in the bearing system is mainly produced by the oil film shear relatively. The relative circumferential velocity is the main influence factor of the heat generation, and the temperature distribution pattern is similar to the circumferential velocity. Heat is gradually transmitted to the porous bearing through convection heat transfer. With the thickness or permeability of the surface layer decreases, the convection heat transfer effect becomes worse, and the temperature in the bearing system increases. So as to enhance the influence of the thermal effect on the lubrication performance. The lubricating performance becomes worse after considering the thermal effect, but it is closer to the experimental results for the raise of the numerical accuracy.

Key words: ring-face friction pair, bilayer oil bearing, porous, thermal effect, lubrication performance

中图分类号: