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表面织构动压滑动轴承油膜力解析模型
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国家自然科学基金项目(50975075);河南省高性能轴承技术重点实验室开发基金项目(2016ZCKF02);河南省基础与前沿技术研究计划重大项目(152300410083).


Analytical Model of Oil Film Force of Surface Textured Hydrodynamic Journal Bearings
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    摘要:

    提出一种求解表面织构动压轴承油膜力的解析模型。基于Sommerfeld油膜边界,通过分离变量的方法,求解表面织构动压滑动轴承二阶偏微分Reynolds方程,得到表面织构动压滑动轴承油膜压力解析式。以圆形凹坑轴承为例,在油膜区域通过积分求得织构轴承的油膜力,分析织构参数对油膜压力的影响,研究发现,表面织构位于收敛区域(升压区)的轴承,其润滑与承载性能优于表面织构位于发散区域(降压区)的轴承、全织构轴承以及光滑轴承。对比了提出的解析模型与FDM和CFD模型在不同长径比和偏心率下的计算结果,结果表明,提出的解析模型能准确地描述表面织构动压滑动轴承的油膜力,且计算结果同FDM和CFD模型计算结果基本一致,验证了该模型的正确性。

    Abstract:

    An analytical model for fluid film forces of hydrodynamic journal bearing was proposed.Based on the Sommerfeld boundary condition,the second order differential Reynolds equation and the integral of fluid film pressure were analyzed by using the separation of variables method,and the analytical expression of oil film force was obtained.Taking circular pit texture bearing as an example,the oil film force was calculated,and the effects of textured parameters on oil film pressure were analyzed.The results show that the bearings with surface texture in convergent region (boost region) have better lubrication and loadbearing performance than the bearings with surface texture in divergent region (decompression region),the full texture bearings and the smooth bearings.The calculation results of the proposed analytical model were compared with those of the FDM and CFD models under different aspect ratios and eccentricities.It is found that the proposed analytical model can accurately describe the oil film force of surface textured hydrodynamic journal bearings,and the calculation results are basically consistent with those of FDM and CFD models,which verifies the correctness and effectiveness of the model.

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毛亚洲,杨建玺,徐文静,李庆林,刘永刚.表面织构动压滑动轴承油膜力解析模型[J].润滑与密封,2019,44(4):46-54.
. Analytical Model of Oil Film Force of Surface Textured Hydrodynamic Journal Bearings[J]. Lubrication Engineering,2019,44(4):46-54.

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  • 在线发布日期: 2019-07-04
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