Research on the Contact and Temperature Field Distribution Characteristic of the Saddle-shaped Buckling Deformation in Hydro-viscous Friction Pair

Yuyu Jiang; Hongwei Cui; Yijun Qiao; Hao Sun; Jingwei Ning

doi:10.16578/j.issn.1004.2539.2022.05.003

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Research on the Contact and Temperature Field Distribution Characteristic of the Saddle-shaped Buckling Deformation in Hydro-viscous Friction Pair

Theory·Reserach | 更新时间：2022-09-24

- Research on the Contact and Temperature Field Distribution Characteristic of the Saddle-shaped Buckling Deformation in Hydro-viscous Friction Pair
- Journal of Mechanical Transmission Vol. 46, Issue 5, Pages: 17-24(2022)
- 作者机构：
  
  1.太原理工大学机械与运载工程学院，山西太原 030024
  2.重庆大学机械传动国家重点实验室，重庆 400044
- 作者简介：
- 基金信息：
- DOI：10.16578/j.issn.1004.2539.2022.05.003
  CLC：
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姜宇宇,崔红伟,乔一军等.液黏摩擦副马鞍形屈曲变形接触及温度场分布特性研究[J].机械传动,2022,46(05):17-24.

Jiang Yuyu,Cui Hongwei,Qiao Yijun,et al.Research on the Contact and Temperature Field Distribution Characteristic of the Saddle-shaped Buckling Deformation in Hydro-viscous Friction Pair[J].Journal of Mechanical Transmission,2022,46(05):17-24.
姜宇宇,崔红伟,乔一军等.液黏摩擦副马鞍形屈曲变形接触及温度场分布特性研究[J].机械传动,2022,46(05):17-24. DOI： 10.16578/j.issn.1004.2539.2022.05.003.

Jiang Yuyu,Cui Hongwei,Qiao Yijun,et al.Research on the Contact and Temperature Field Distribution Characteristic of the Saddle-shaped Buckling Deformation in Hydro-viscous Friction Pair[J].Journal of Mechanical Transmission,2022,46(05):17-24. DOI： 10.16578/j.issn.1004.2539.2022.05.003.

摘要

马鞍形屈曲变形是液黏离合器摩擦副最主要的热屈曲变形方式。为获取变形摩擦副的接触特性及温度场分布规律，基于椭球体赫兹点接触理论与屈曲变形规律，建立了摩擦副接触变形等效模型，获得了软启动工况下变形摩擦副接触应力的分布与变化规律；提出了考虑接触应力分布时变特性及对流换热条件的二维瞬态温度场计算模型，对摩擦副滑摩过程表面温升及温度场进行了仿真分析。结果表明，软启动过程中，摩擦副由局部接触发展为完全接触，接触区由弯曲椭圆形对称分布于摩擦副两侧发展至完全覆盖，应力大小由接触中心向四周呈椭圆形梯度下降；受接触应力影响，滑摩温度场同样按照从高温中心向四周呈椭圆形梯度下降的方式分布，但对流换热条件的差异导致高温中心相对于接触中心向对偶钢片外侧偏移，使得外径一侧整体温度更高。研究结果为后续液黏摩擦副热机耦合特性与转矩热失稳方面的研究提供了理论基础。

Abstract

The saddle-shaped buckling deformation is the main thermal buckling deformation mode of the friction pairs in the hydro-viscous clutch. The equivalent model of contact deformation is established to obtain the contact and temperature field distribution characteristics of the deformed friction pairs， which are based on the hertz point contact theory of the ellipsoid and buckling deformation law. The distribution and variation of deformed friction pairs contact stress under the soft-start condition are obtained. A two-dimensional transient temperature field calculation model that considers the time-varying characteristics of the contact stress distribution and the convective heat transfer conditions are proposed， and the temperature rise in surface along with the temperature field of friction pairs in the sliding process is simulated and analyzed. The results show that in the process of soft-start， the friction pairs develop from the local contact to full contact. The contact area develops from the bending ellipse symmetrically distributed on both sides of the friction pair to full coverage and shows that the stress decreases from the contact center to the surrounding in an elliptical gradient. Under the influence of the contact stress， the temperature field of the sliding friction also decreases in an elliptical gradient from the high-temperature center to the surrounding. The difference in convective heat transfer conditions causes the high-temperature center to shift towards the outside of the sheet disk relative to the contact center， which increases the overall temperature of the outer diameter side. The results lay a theoretical ground for further research on the thermo mechanical coupling characteristics and the torque thermal instability of the hydro-viscous friction pairs.

关键词

液黏离合器摩擦副马鞍形屈曲变形赫兹接触温度场

Keywords

Hydro-viscous clutchFriction pairSaddle-shaped buckling deformationHertz contactTemperature field

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