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首页> 外文期刊>Journal of the Balkan Tribological Association >LOAD CARRYING CAPACITY OF PARTIALLY TEXTURED SLIDING JOURNAL BEARING BASED ON THREE DIMENSIONAL CFD
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LOAD CARRYING CAPACITY OF PARTIALLY TEXTURED SLIDING JOURNAL BEARING BASED ON THREE DIMENSIONAL CFD

机译：基于三维CFD的部分滑行滑动轴承的承载能力

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摘要

Surface texture can produce cavitation-load-carrying effect under hydrodynamic lubrication, therefore a proper cavitation boundary condition (CBC) is needed in the lubrication analysis of surface texture. The Reynolds' CBC, which was generally used in the past, is not mass conservation. For the mass conservation JFO (Jakobsson-Floberg-Olsson) CBC, it is not entirely reasonable to accept that the pressure of cavitation zone remains constant. In this paper, three-dimensional finite element models of oil film for partially textured journal bearing are established using the ADINA-CFD module, applying a phase change CBC on the fluid domain. Vapor and liquid coexist in the cavitation region, the vapor phase volume fraction is related to the negative pressure. The effects of partial texture location and dimple depth on load carying capacity (LCC), are investigated. The results of simulation show that texture located at lubricant inlet area can improve the performance of bearing, and the effect of shallow dimples on LCC is superior to the deep ones. However, the bearing performance will be reduced, if the texture is located at the maximal pressure area. When the texture is located at the lubricant outlet area, there will be two different situations: the part of the texture located within the oil film divergent area can improve the LCC; while the part that is beyond the divergent region will make the LCC decrease, and the more textured area in the convergent region is, the greater is the decline of the LCC.
机译：表面织构在流体动力润滑下会产生空化载荷效应，因此在表面织构的润滑分析中需要适当的空化边界条件（CBC）。雷诺兹（Reynolds）的CBC过去一直被广泛使用，它不是大规模保存。对于JFO（Jakobsson-Floberg-Olsson）CBC的质量守恒，接受空化区的压力保持恒定并不完全合理。在本文中，使用ADINA-CFD模块建立了部分纹理轴颈轴承油膜的三维有限元模型，并在流体域上应用了相变CBC。汽化和液体共存于空化区域，汽相体积分数与负压有关。研究了局部纹理位置和凹坑深度对承载能力（LCC）的影响。仿真结果表明，位于润滑剂入口区域的织构可以改善轴承的性能，浅凹痕对LCC的影响优于深凹痕。但是，如果纹理位于最大压力区域，则会降低轴承性能。当纹理位于润滑剂出口区域时，将出现两种不同的情况：位于油膜发散区域内的纹理部分可以改善LCC;当油膜发散区域中的纹理部分位于油膜发散区域时，LCC会改善。而发散区域之外的部分将使LCC减小，而收敛区域中的纹理区域越多，LCC的衰减越大。

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