王保民,王慧心,钱斯凯,杜雪兵,陈欣.空化效应对非对称织构化滑动轴承摩擦性能的影响[J].表面技术,2025,54(1):171-180.
WANG Baomin,WANG Huixin,QIAN Sikai,DU Xuebing,CHEN Xin.Cavitation Effect on Tribological Performance of Journal Bearing with Asymmetric Micro-texture[J].Surface Technology,2025,54(1):171-180 |
| 空化效应对非对称织构化滑动轴承摩擦性能的影响 |
| Cavitation Effect on Tribological Performance of Journal Bearing with Asymmetric Micro-texture |
| 投稿时间：2023-12-29 修订日期：2024-04-08 |
| DOI：10.16490/j.cnki.issn.1001-3660.2025.01.016 |
| 中文关键词: 非对称微织构 滑动轴承 空化效应 空化面积率 摩擦性能 |
| 英文关键词:asymmetric micro-texture journal bearing cavitation effect cavitation area rate tribological performance |
| 基金项目:国家自然科学基金(51965038) |
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| Author | Institution |
| WANG Baomin | School of Mechanical and Electrical Engineering, Lanzhou University of Technology, Lanzhou 730050, China |
| WANG Huixin | School of Mechanical and Electrical Engineering, Lanzhou University of Technology, Lanzhou 730050, China |
| QIAN Sikai | School of Mechanical and Electrical Engineering, Lanzhou University of Technology, Lanzhou 730050, China |
| DU Xuebing | School of Mechanical and Electrical Engineering, Lanzhou University of Technology, Lanzhou 730050, China |
| CHEN Xin | School of Mechanical and Electrical Engineering, Lanzhou University of Technology, Lanzhou 730050, China |
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| 中文摘要: |
| 目的 通过改变滑动轴承及其表面非对称织构的相关参数，探究空化效应对非对称织构化滑动轴承摩擦学性能的影响。方法 基于N-S流体计算方程，采用Schnerr-Sauer空化模型，建立三角形非对称织构化滑动轴承数值分析模型，并进行求解，分析微织构排布位置、非对称性、宽深比及轴承偏心率等不同时，空化效应对滑动轴承摩擦学性能的影响。结果 非对称织构布置在最大油膜压力附近时，空化效应对滑动轴承承载力和摩擦因数的影响最大;空化效应对非对称织构化滑动轴承摩擦性能的影响大于对称性织构;非对称织构的宽深比过大或过小均不利于空化区域的形成，会降低滑动轴承的空化面积率;滑动轴承的偏心率越大，空化面积率越大，空化效应对非对称织构化滑动轴承摩擦性能的影响程度也随之增大。结论 在计入空化效应条件下，三角形非对称织构化滑动轴承的摩擦力均不同程度地提高，摩擦因数均不同程度地降低。空化效应对三角形非对称微织构化滑动轴承摩擦性能的提升程度与空化面积率有关，即空化面积率越大，空化现象越明显，提升程度越高。 |
| 英文摘要: |
| At present, the research on textured surfaces of journal bearings mainly focuses on symmetric textures, and existing studies on asymmetric textured surfaces have shown that reasonable changes for the asymmetry of textured cross section can enhance the cavitation effect of textured surface, which can effectively improve the tribological performance of textured surface. The work aims to investigate the degree of cavitation effect on the tribological performance of asymmetric textured journal bearing when relevant parameters of journal bearing and its surface asymmetric textures have a changement. In this study, based on the N-S fluid calculation equation and the Schnerr-Sauer cavitation model, the numerical calculation model of triangular asymmetric micro-textured journal bearing was established and solved. On account of changement about arrangement positions, asymmetry, aspect ratios of micro-texture and eccentricity of textured bearing, the cavitation effect on tribological performance of journal bearing with asymmetric micro-texture was analyzed. It was found that the tribological performance of triangular asymmetric textured journal bearings was further improved under the condition of accounting for the cavitation effect. The degree to which the cavitation effect improved tribological performance of triangular asymmetric micro-textured journal bearing was related to cavitation area rate, indicating that the larger the cavitation area rate, the more obvious the cavitation phenomenon, and the higher the degree of improvement. When the triangular asymmetric texture was arranged near the maximum pressure of oil film , the journal bearing had the maximum cavitation area rate. The cavitation effect had the greatest effect on bearing capacity and friction coefficient, which increased the bearing carrying capacity by 2.4% and decreased the friction coefficient by 26.1%, respectively. The cavitation area rate of asymmetric textured journal bearings was significantly higher than that of symmetric textured journal bearings, and the cavitation effect had a larger effect on the tribological performance of asymmetric textured journal bearings than that of symmetric textured journal bearings. When the inlet length of asymmetric texture was smaller than the outlet length and the inlet was relatively smooth, the cavitation effect improved the tribological performance of journal bearing better. If the aspect ratio of asymmetric micro-texture is too large or too small, it is not conducive to the formation of cavitation areas and will reduce cavitation area rate of journal bearing. For several sets of aspect ratios designed in this study, there is the maximum cavitation area rate at λ=5, while the maximum bearing capacity and the minimum friction coefficient are obtained. Besides, according to the variation tendency of cavitation area rate with the aspect ratio of triangular asymmetric texture, the maximum cavitation area rate of triangular asymmetric textured journal bearings will appear at λ=5 or other values around λ=5. The cavitation area rate of journal bearing increases with the increase of eccentricity and the degree of the cavitation effect on bearing capacity of journal bearing also increases with the increase of eccentricity. However, excessive eccentricity leads to an increasing cavitation region of the divergent wedge, which is detrimental to the integrity of oil film. Therefore, it is necessary to choose appropriate eccentricity according to the actual situation to achieve the required tribological performance. |
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