| 引用本文: | 王丽丽,张伟,葛雪,段敬东.复合微织构排列方式对轴承润滑性能的影响[J].中国表面工程,2023,36(1):145~155 |
| WANG Lili,ZHANG Wei,GE Xue,DUAN Jingdong.Effect of Compound Micro Texture Arrangement on Journal Bearing Lubrication Performance[J].China Surface Engineering,2023,36(1):145~155 |
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| 摘要: |
| 目前对于多种织构复合表面轴承的排列方式的研究有待进一步深化。为了提升轴承承载力、降低摩擦因数和提升轴承稳定性，数值模拟及试验研究复合微织构排列方式对滑动轴承系统的动静特性的影响，并与单一微织构轴承及光滑轴承进行比较。利用有限差分法对轴承转子系统中油膜的 Reynolds 方程进行数值求解，针对圆形复合矩形、三角形复合菱形及六边形复合月牙形三种复合织构，在四种不同排列方式的条件下对轴承静特性(油膜压力、承载力、摩擦阻力和端泄量)以及轴承动特性(刚度系数和阻尼系数)的影响进行研究，并利用摩擦磨损试验仪对摩擦副摩擦学性能进行进一步试验探究。理论及试验结果显示，复合微织构轴承比光滑轴承和单一微织构轴承获得更大的承载力、更小的摩擦因数、更佳的动特性性能；三角形复合菱形微织构时摩擦副性能最佳，排列方式为周向对应平行排列时能够取得更佳的摩擦及润滑性能。研究复合织构排列方式对轴承润滑性能的影响可为复合织构在实际工况中应用提供理论参考和指导。 |
| 关键词: 复合微织构 排列方式 滑动轴承 动静特性 摩擦因数 |
| DOI：10.11933/j.issn.1007?9289.20220502001 |
| 分类号:TH117 |
| 基金项目:矿山机械工程山东省重点实验室校企联合基金(山东科技大学)(2022KLMM304)和山东省博士后创新项目专项资金(201701016)资助项目 |
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| Effect of Compound Micro Texture Arrangement on Journal Bearing Lubrication Performance |
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WANG Lili, ZHANG Wei, GE Xue, DUAN Jingdong
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College of Mechanical and Electronic Engineering, Shandong University of Science and Technology,Qingdao 266590 , China
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| Abstract: |
| Lubrication performance of composite micro textured surfaces has a certain extent study, however, current research on the arrangement of various textured composite surface bearings must be further advanced. To improve bearing stability, capacity, and reduce the friction factor, the effect of compound micro textures and its arrangement on the static and dynamic characteristics of a hydrodynamic journal bearing system is studied numerically and experimentally, and a comparison between a single and smooth micro texture journal bearing is conducted. The Reynolds equation, oil film thickness equation of the micro texture journal bearing, and the disturbance pressure equation of the oil film in the journal bearing rotor system is numerically solved using the finite difference method and Reynolds boundary condition. Aiming to produce three compound texture shapes (circular composite rectangle, triangular composite rhombic and hexagonal composite crescent), the bearing static characteristics: oil film pressure, bearing capacity, friction drag and end leakage, and the bearing dynamic characteristics: stiffness and damping coefficient are studied under the conditions of four different arrangement modes (Circumferential and axial corresponding parallel, circumferential staggered parallel and axial staggered parallel), and the friction pair tribological properties are further examined using the friction and wear tester. Theoretical and experimental results demonstrate that the compound micro texture bearing obtains greater bearing capacity, smaller friction factor, better dynamic performance and stability than the smooth and single micro texture journal bearings. This is because during the process of fluid lubrication, different composite texture units interact, and the hydrodynamic effect of composite texture units is stronger. The triangular composite rhombic micro texture is more capable of improving the dynamic and static characteristics of the bearing, and reducing the friction coefficient of friction pairs, has a small fluctuation range and the best tribological performance. When the arrangement mode is circumferential corresponding parallel, the texture arrangement of the same shape is parallel to the movement direction, which is conducive to enhancing the wedge and hydrodynamic effect of the bearing. In addition, each micro texture in the pressure rise region ensures that the inflow of lubricating oil is larger than the outflow, which also results in an improved hydrodynamic effect. Thus, when the arrangement mode is circumferential corresponding parallel, it effectively increases the bearing capacity and direct stiffness coefficient, and reduces the bearing friction drag, crossing coupling stiffness coefficient and damping coefficient. Simultaneously, the experiment proves that the friction coefficient and tribological performance of parallel arranged friction pairs corresponding to the circumferential direction are the smallest. In summary, this study demonstrates that investigating the effect of composite texture arrangement on bearing lubrication performance, can improve bearing capacity and stability, reduce the bearing friction coefficient, and provide an important theoretical reference including guidance for the practical application of compound micro textures in industry. |
| Key words: compound micro texture arrangement journal bearing static and dynamic characteristics friction factor |
