朱春霞,王德全,杨晓楠,常永祥.非对称表面织构表征及动压润滑效应分析[J].表面技术,2022,51(3):66-75.
ZHU Chun-xia,WANG De-quan,YANG Xiao-nan,CHANG Yong-xiang.Characterization of Asymmetric Surface Texture and Analysis of Hydrodynamic Lubrication Effect[J].Surface Technology,2022,51(3):66-75 |
| 非对称表面织构表征及动压润滑效应分析 |
| Characterization of Asymmetric Surface Texture and Analysis of Hydrodynamic Lubrication Effect |
| 投稿时间：2021-03-31 修订日期：2021-08-10 |
| DOI：10.16490/j.cnki.issn.1001-3660.2022.03.006 |
| 中文关键词: 非对称 表面织构 表征方程 W-M函数 CFD 动压润滑效应 |
| 英文关键词:asymmetric surface texture characterization equation W-M function CFD hydrodynamic lubrication effect |
| 基金项目:国家自然科学基金面上项目(51575365);辽宁省“兴辽英才计划”项目(XLYC1807065) |
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| Author | Institution |
| ZHU Chun-xia | School of Mechanical Engineering, Shenyang Jianzhu University, Shenyang 110168, China |
| WANG De-quan | School of Mechanical Engineering, Shenyang Jianzhu University, Shenyang 110168, China |
| YANG Xiao-nan | School of Mechanical Engineering, Shenyang Jianzhu University, Shenyang 110168, China |
| CHANG Yong-xiang | School of Mechanical Engineering, Shenyang Jianzhu University, Shenyang 110168, China |
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| 中文摘要: |
| 目的 建立具有非对称表面织构的粗糙平面的表征方程，并分析方程参数对其形貌的影响，依托表征方程重建的织构平面研究非对称表面织构在动压润滑条件下的润滑特性。方法 根据非对称织构平面的加工过程，基于W-M函数重构粗糙表面，再叠加非对称织构形貌特征方程，实现不同尺寸非对称表面织构的数学表征，利用Matlab软件对方程中表面织构参数和粗糙表面参数对织构平面形貌的影响进行分析，并利用方程表征的织构平面建立动压润滑压力油膜的实体模型，对压力油膜进行CFD计算，分别得出正向非对称织构、对称织构、反向非对称织构中的压力分布规律和流线分布规律，实现非对称表面织构的动压润滑效应分析。结果 表征方程的各个参数中，尺度系数和分形维数主要影响粗糙表面轮廓高度的变化范围和变化频率，微观轮廓高度的变化范围随着尺度系数的减小以同样的倍率减小，微观轮廓高度变化随着分形维数的逐渐增大越来越剧烈，变化频率也越来越快，非对称度、织构深度等织构相关参数主要影响织构的形貌特征。润滑压力油膜CFD分析计算表明，正向非对称织构(k=2)的进出口压力差为1747 Pa，明显大于对称织构(k=1，387 Pa)和反向非对称织构(k=0.5，707 Pa)，三者的流线分布云图表明，正向非对称织构内的回流效应更加剧烈，流线分布更加复杂。结论 所建立的非对称织构平面的表征方程可以清晰地描述其形貌特征，方程参数对形貌特征的影响机理明确，且构型合理的非对称织构在提高承载能力和改善润滑方面存在明显的优越性。 |
| 英文摘要: |
| The work aims to establish the characterization equation of the rough plane with asymmetric surface texture and analyze the effect of the equation parameters on the morphology and study the lubrication characteristics of the asymmetric surface texture under hydrodynamic lubrication conditions based on the texture plane reconstructed by the characterization equation. According to the machining process of the asymmetric texture plane, the rough surface was reconstructed based on the W-M function and then the morphology characteristic equation of the asymmetric texture was superimposed to achieve the mathematical characterization of the asymmetric surface texture of different sizes. The effects of surface texture parameters and rough surface parameters in the equation on the texture plane morphology were analyzed by Matlab software. The solid model of the hydrodynamic lubrication pressure oil film was established by the texture plane represented by the equation, and the CFD calculation of the pressure oil film was carried out. The pressure distribution law and streamline distribution law in the forward asymmetric, symmetric and reverse asymmetric textures were obtained respectively, and the hydrodynamic lubrication effect analysis of the asymmetric surface texture was realized. Among the parameters of the equation, the scale coefficient and fractal dimension mainly affected the variation range and frequency of the rough surface contour height. The microscopic contour height decreased at the same rate with the decrease of the scale coefficient, and the variation of the microscopic contour height became more and more violent with the gradual increase of the fractal dimension, and the frequency of variation became faster and faster. Some texture-related parameters, such as asymmetry rate and texture depth, specifically affected the morphology of the texture. The CFD analysis and calculation of lubrication pressure film showed that the pressure difference between the inlet and outlet of the forward asymmetric texture (k=2) was 1747 Pa, which was significantly greater than the 387 Pa of the symmetric texture (k=1) and the 707 Pa of the reverse asymmetric texture (k=0.5). The streamline distribution nephogram showed that the reflux effect in the forward asymmetric texture was more intense and the streamline distribution was more complex. The established characterization equation of the asymmetric texture plane can clearly describe its morphology, and the effect mechanism of the equation parameters on the morphology is clear. Moreover, the asymmetrical texture with reasonable configuration has obvious advantages in increasing load capacity and improving lubrication. |
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