Effect of Surface Roughness on Characteristics of Textured Hydrodynamic Bearings

Hongtao Wang; Shaolin Zhang; Shuai Yang

doi:10.16578/j.issn.1004.2539.2022.08.003

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Effect of Surface Roughness on Characteristics of Textured Hydrodynamic Bearings

Theory·Reserach | 更新时间：2022-09-23

- Effect of Surface Roughness on Characteristics of Textured Hydrodynamic Bearings
- Journal of Mechanical Transmission Vol. 46, Issue 8, Pages: 16-21(2022)
- 作者机构：
  
  1.郑州大学机械与动力工程学院，河南郑州 450001
- 作者简介：
- 基金信息：
- DOI：10.16578/j.issn.1004.2539.2022.08.003
  CLC：
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王鸿涛,张绍林,杨帅.表面粗糙度对织构化动压轴承特性影响研究[J].机械传动,2022,46(08):16-21.

Wang Hongtao,Zhang Shaolin,Yang Shuai.Effect of Surface Roughness on Characteristics of Textured Hydrodynamic Bearings[J].Journal of Mechanical Transmission,2022,46(08):16-21.
王鸿涛,张绍林,杨帅.表面粗糙度对织构化动压轴承特性影响研究[J].机械传动,2022,46(08):16-21. DOI： 10.16578/j.issn.1004.2539.2022.08.003.

Wang Hongtao,Zhang Shaolin,Yang Shuai.Effect of Surface Roughness on Characteristics of Textured Hydrodynamic Bearings[J].Journal of Mechanical Transmission,2022,46(08):16-21. DOI： 10.16578/j.issn.1004.2539.2022.08.003.

摘要

针对带有表面微织构的径向动压轴承，采用高斯随机粗糙表面模拟轴瓦表面粗糙度，建立了表面微织构和粗糙度耦合作用下轴承油膜特性数学模型；在此基础上，计算不同偏心率及转速下油膜静、动特性参数，并分析了粗糙度对织构化动压轴承压力分布、失稳转速等的影响。结果表明，各偏心下适当的表面粗糙度能够提升织构化动压轴承油膜压力及承载能力；摩擦力及平均温升亦有上升，且粗糙度造成织构化动压轴承失稳转速降低。将理论结果与M2000型摩擦磨损试验机测试结果进行对比，验证了模型的合理性。研究对同时计入粗糙度和织构的滑动轴承润滑机理研究有一定的借鉴意义。

Abstract

For a radial hydrodynamic bearing with surface micro texture，the Gauss random rough surface is used to simulate the surface roughness of the bearing bush. A mathematical model of bearing oil film characteristics is established under the coupling of surface micro texture and roughness. On this basis，the static and dynamic characteristic parameters under different eccentricities and speeds are calculated and the influence of the surface roughness on the pressure distribution and instability threshold speed of textured hydrodynamic bearings are analyzed. The results show that the proper surface roughness can improve the oil film pressure and bearing capacity under certain eccentricities，the friction force and average temperature rise also increase，and the instability speed of textured hydrodynamic bearing decreases due to roughness. The theoretical results are compared with the test results of the M2000 friction and wear testing machine to verify the rationality of the model. The research has certain reference significance for the study of the lubrication mechanism of sliding bearings that take into account both roughness and texture.

关键词

动压轴承表面粗糙度微织构特性参数

Keywords

Hydrodynamic bearingSurface roughnessMicro textureCharacteristic parameters

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