摘要
针对有限差分法(FDM)解析Reynolds方程迭代次数多的缺点,提出了一种基于Sommerfeld油膜边界,通过分离变量法求解表面织构动压轴承油膜力的解析模型。分析了长径比、偏心率和织构参数对非线性油膜力的影响,对比了本文的解析模型与短轴承模型、FDM和计算流体动力学(CFD)的计算结果。研究结果表明:长径比和偏心率分别为0. 25～0. 80和0. 10～0. 95的织构化轴承油膜压力和油膜力分别为近似抛物线分布和近似指数分布。长径比为0. 25的本文模型同短轴轴承模型油膜压力分布具有很好的一致性;而长径比为0. 80的本文模型与CFD计算结果,在0°～60°和130°～180°油膜域内也具有很好的一致性。本文模型能够准确地描述表面织构动压轴承油膜力的变化,同时该方法的正确性也得到了验证。
In order to overcome the shortcomings of the finite difference method( FDM) in solving the Reynolds equation,an analytical model based on the Sommerfeld oil film boundary condition was proposed to solve the oil film force of surface texured hydrodynamic journal bearing by separating variables. The effects of aspect ratio,eccentricity and texture parameters on the nonlinear oil film force were analyzed. The computing results of short bearing,FDM and computational fluid dynamic( CFD) were compared with that of the proposed analytical model. The results show that the oil film pressure and oil film force are approximately parabolic and approximately exponential distributions for surface textured hydrodynamic journal bearings with the aspect raitos and eccentricities of 0. 25 ～ 0. 80 and 0. 10 ～ 0. 95,respectively. The oil film pressure distribution of short bearing is in good agreement with the analytical model of aspect ratio 0. 25. However,the calculated results of CFD are in good agreement with the analytical model of aspect ratio 0. 8 in the 0° ～ 60° and 130° ～180° oil film domain. The analytical model presented in this paper can accurately describe the variation of oil film force on the surface textured hydrodynamic journal bearing,and the correctness of the method is also verified.
出处
《河南科技大学学报（自然科学版）》
CAS
北大核心
2019年第3期17-23,106,共8页
Journal of Henan University of Science And Technology:Natural Science
基金
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)
