摘要
多叶动压气体滑动轴承因其高转速、高精度和低磨损等优点广泛应用在高速旋转机械中。本文联合偏导数法和有限差分法(FDM)求解气体可压缩Reynolds方程,计算了三叶动压气体轴承的动态特性,探究了轴颈扰动频率、偏心率、长径比及瓦块分布位置等参数对轴承动态特性的影响。研究表明:轴承的正交刚度和阻尼系数随偏心率、长径比和预负荷系数的增大而增大,正交刚度系数随轴承数和轴颈扰动频率的增加而增大,而正交阻尼系数呈现出相反的变化趋势,在瓦上承载方式下正交刚度(Kyy)和正交阻尼(Dxx)均大于瓦间承载,瓦上承载方式下正交刚度(Kxx)和正交阻尼(Dyy)均小于瓦间承载。
Multi-leaf hydrodynamic gas journal bearing is widely used in high-speed rotating machinery due to their advantages of high speed,high precision,and low wear.The partial derivative method and finite difference method(FDM)were used to solve the gas compressible Reynolds equation,the dynamic characteristics coefficient of the three-leaf aerodynamic bearing was calculated,and the influences of journal disturbance frequency,eccentricity,length diameter ratio and pad distribution position on the dynamic coefficient were discussed in detail.Research showed that the orthogonal stiffness and damping coefficient of the bearing increased with the rise of eccentricity ratio,length-diameter ratio and preload factor.As the bearing number and journal disturbance frequency rose,the orthogonal stiffness coefficient improved significantly,while the orthogonal damping coefficient showed the opposite trend,with the load on pad,the orthogonal stiffness(Kyy)and orthogonal damping(Dxx)were larger than load between pad,the orthogonal stiffness(Kxx)and orthogonal damping(Dyy)of the load on pad were smaller than load between pad.
作者
陈阳
吴垚
张功学
赵志明
史少斌
CHEN Yang;WU Yao;ZHANG Gongxue;ZHAO Zhiming;SHI Shaobin(College of Mechanical and Electrical Engineering,Shaanxi University of Science and Technology,Xi’an 710021,China)
出处
《航空动力学报》
北大核心
2025年第8期454-465,共12页
Journal of Aerospace Power
基金
国家自然科学基金(51305246)
西安科学技术局高校院所人才服务企业项目(23GXFW0006)
陕西省2022年自然科学基础研究计划一般项目(2022JQ-002)
陕西科技大学引进人才博士启动基金(2021BJ-11)。
关键词
多叶气体轴承
动态Reynolds方程
动态性能
偏导数法
有限差分法
multi-leaf gas bearing
dynamic Reynolds equation
dynamic performance
partial derivative method
finite difference method
