静压支承导轨密封边的油膜特性

发布时间：2018-03-22 14:08

本文选题：静压支承　切入点：油膜　出处：《中南大学学报(自然科学版)》2015年09期 　论文类型：期刊论文

【摘要】：基于理论分析,研究静压支承系统中静压油垫的承载力和刚度特性。利用Coons曲面法建立壁面粗糙形貌符合高斯分布的油膜三维模型,采用数值模拟手段从微观的角度分析粗糙度对密封边油膜性能的影响。研究结果表明:设计参数ηo存在1个理论最优值使得油垫承载刚度达到最大。受粗糙度影响,油膜压力分布呈现随机波动性。油膜承载力与流动速度保持线性增加关系,但随厚度的增加逐渐降低,降低幅度不断减小。相对粗糙度越大油膜承载力越高,且承载力的增加量几乎不受油膜厚度变化的影响,而流动速度变化时,承载力的增加表现为变化率基本相等。
[Abstract]:Based on the theoretical analysis, the bearing capacity and stiffness characteristics of hydrostatic oil cushion in hydrostatic support system are studied. Using Coons surface method, a three-dimensional model of oil film with rough appearance of wall consistent with Gao Si distribution is established. The influence of roughness on the performance of sealing edge oil film is analyzed by numerical simulation from a microscopic point of view. The results show that there exists a theoretical optimum value of design parameter 畏 _ o, which makes the bearing stiffness of oil cushion maximum and is affected by roughness. The oil film pressure distribution shows random fluctuation. The oil film bearing capacity increases linearly with the flow velocity, but decreases gradually with the increase of the thickness. The higher the relative roughness, the higher the oil film bearing capacity. The increase of bearing capacity is almost independent of the change of oil film thickness, but the increase rate of bearing capacity is almost equal when the flow velocity changes.
【作者单位】：南京工业大学车辆与工程机械研究所;南京工程学院机械工程学院;
【基金】：国家自然科学基金资助项目(50875122) 江苏省科技支撑项目(BE2011187) 江苏省普通高校研究生科研创新计划资助项目(CXZZ13_0432)~~
【分类号】：TG502.3

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