基于FLUENT的静压气体轴承节流孔系数研究  

Study on Discharge Coefficient of Aerostatic Bearings Based on FLUENT

作　　者：邓志芳 张建波 陈策 张坤 丁泊遥 DENG Zhifang;ZHANG Jianbo;CHEN Ce;ZHANG Kun;DING Boyao(AECC Hunan Aviation Powerplant Research Institute,Zhuzhou Hunan 412002,China;Taihang Laboratory,Chengdu Sichuan 610299,China;Army Aviation Institute,Beijing 101121,China;China General Technology(Group)Holding Co.,Ltd.,Beijing 100161,China)

机构地区：[1]中国航发湖南动力机械研究所,湖南株洲412002 [2]太行实验室,四川成都610299 [3]陆军航空兵研究所,北京101121 [4]中国通用技术(集团)控股有限责任公司,北京100161

出　　处：《润滑与密封》2024年第6期195-200,共6页Lubrication Engineering

摘　　要：在通过求雷诺方程来研究静压气体轴承的特性时,通常假设节流孔系数为常数0.8,这可能会影响雷诺方程求解的精度。结合FLUENT软件和雷诺方程提出一种静压气体轴承节流孔系数的求解方法,该方法通过对比FLUENT和雷诺方程计算得到的质量流量求解节流孔系数;分析气膜厚度、供气压力、节流孔直径等参数对节流孔系数的影响。结果表明:节流孔系数随着膜厚的增加先增大后减少,随着供气压力的增大而减少,随着节流孔直径的增大而增大,但节流孔系数对轴承半径和节流孔长度的变化并不敏感。采用该节流孔系数求解雷诺方程得到的轴承承载力,与FLUENT计算得到的承载力结果基本一致,验证了该方法的正确性与可行性。When studying the characteristics of aerostatic bearings with orifices by solving the Reynolds equation,it is usually assumed that the discharge coefficient is a constant of 0.8,which may affect the accuracy of solving the Reynolds equation.A method which combined Fluent and Reynolds equation was proposed to obtain the discharge coefficient in the aerostatic thrust bearings with inherent orifices.The discharge coefficients were calculated by comparing the mass flow rate obtained by FLUENT and Reynolds equation simulations.The influence of parameters such as gas film thickness,gas supply pressure,and orifice diameter on the orifice coefficient was analyzed.The results indicate that the discharge coefficient increases first and then decreases with the increase of film thickness,decreases with the increase of gas supply pressure,and increases with the increase of orifice diameter.However,the discharge coefficient is not sensitive to changes in bearing radius and orifice length.The bearing capacity from solution of Reynolds equation with the discharge coefficient obtained by this solution method is agreement with that from FLUENT,verifying the correctness and feasibility of this solution method.

关 键 词：静压气体止推轴承 节流孔系数 节流孔 承载力 雷诺方程 

分 类 号：TH117[机械工程—机械设计及理论]