中国计量大学学报2024，Vol.35Issue(1)：43-52,10.DOI:10.3969/j.issn.2096-2835.2024.01.007
非均匀分布变节流孔直径静压气浮主轴承载能力与稳定性研究
Research on load carrying capacity and stability of air bearing spindles restricted by unevenly-distributed orifices with different diameters
摘要
Abstract
Aims:This paper aims to study the influence of throttle hole distribution and diameter coefficient on the bearing capacity and stability of the spindle.Methods:A new type of static pressure air bearing spindle structure with non-uniform distribution variable throttle hole diameters was proposed;and the finite difference combined with the linear small disturbance method was used to solve the non-stationary Reynolds equation and calculate the spindle performance.Results:The distribution of throttle holes,throttle hole diameter coefficient,eccentricity,gas supply pressure,and average gas film thickness had a significant impact on the bearing capacity and stability of the spindle.When the eccentricity was 0.15 and the gas supply pressure was 0.6 MPa,the bearing capacity of the new air bearing spindle increased by 25％.The maximum bearing capacity of the spindle was achieved when the diameter coefficient of the throttle hole was between 0.90 and 0.95.Conclusions:The greater the eccentricity is the more significant the impact of orifice distribution on bearing capacity is.Compared to traditional spindles,the diameter coefficient of the throttle hole has a smaller impact on the load-bearing capacity of the new spindle.The bearing capacity of the air bearing spindle increases with the increase of gas supply pressure and eccentricity,and decreases with the increase of average gas film thickness.The smaller the eccentricity is,the more significant the improvement of spindle stability is due to the non-uniform distribution of throttle holes.Changing the diameter of throttle holes is beneficial for increasing the critical vortex ratio of the spindle,reducing the critical inertial force,and enhancing spindle stability.Increasing the average gas film thickness is beneficial for improving the stability of the spindle.Increasing the gas supply pressure leads to an increase in the critical inertia force of the spindle and a decrease in stability.关键词
静压气浮主轴/有限差分法/承载能力/稳定性/变节流孔直径Key words
gas journal spindle/finite difference method(FDM)/load carrying capacity/stability/orifice with variable diameter分类
机械制造引用本文复制引用
高翔,章聪,李运堂,王鹏峰,廖佳文,马城辉,王冰清,陈源,李孝禄,金杰..非均匀分布变节流孔直径静压气浮主轴承载能力与稳定性研究[J].中国计量大学学报,2024,35(1):43-52,10.基金项目
国家自然科学基金项目(No.51675198),浙江省自然科学基金重点项目(No.LZ23E050002,LZ23E060002),浙江省属高校基本科研业务费专项项目(No.2020YW29) （No.51675198）
