摘要
以超高速空气静压止推轴承为研究对象,建立了圆形、环形、扇形和十字形四种均压槽轴承的CFD仿真模型,采用计算流体力学方法,对比分析了有无均压槽轴承在不同气膜厚度与工作转速下对轴承承载性能(压力分布、承载力、刚度、消耗气体质量流量)、稳定性(最大气流速度与湍流动能)的影响。结果表明,气膜厚度和工作转速对5种轴承的承载性和稳定性影响较大,并得到了其影响规律;其中,环形槽轴承兼顾承载性与稳定性,通过实验验证得到环形槽轴承的最佳工作转速。研究成果可为超高速空气静压轴承的进一步优化提供一定的理论依据。
Taking the ultra-high-speed aerostatic thrust bearing as the research object, the CFD simulation models of four kinds of pressure equalizing groove bearings, namely circular, annular, sector and cross-shaped, were established.By using the computational fluid dynamics, the effects of pressure equalizing groove bearings and those without groove bearings on bearing load performance(pressure distribution, load capacity, stiffness, mass flow of consumed air) and stability(maximum airflow velocity and turbulence kinetic energy) under different air film thicknesses and working speeds were compared and analyzed.The results show that the film thickness and working speed have great influence on the load performance and stability of five kinds of bearings, and their influence laws are obtained.Among them, the annular groove bearing gives consideration to both bearing capacity and stability, and the optimal working speed of the annular groove bearing is obtained through experimental verification.The research results can provide a theoretical basis for further optimization of ultra-high speed aerostatic bearings.
作者
张静
管旭
杨佳成
张浩
ZHANG Jing;GUAN Xu;YANG Jia-cheng;ZHANG Hao(Engineering Training Center,Nanjing Forestry University,Nanjing 210037,China;School of Mechanical and Power Engineering,Nanjing Tech University,Nanjing 211816,China)
出处
《组合机床与自动化加工技术》
北大核心
2023年第1期129-133,137,共6页
Modular Machine Tool & Automatic Manufacturing Technique
基金
国家自然科学基金(51205211)。
关键词
空气静压轴承
均压槽结构
承载性能
稳定性
aerostatic bearing
pressure equalizing groove structure
load performance
stability
