摘要
为探究小孔节流气浮轴承的误差均化能力的主要影响因素,建立单个气浮垫的误差运动模型,并利用所定义的均化系数研究气浮垫误差运动、导轨条形状误差和气浮垫结构参数三者之间的定量关系。研究表明:对于长波长的导轨条形状误差(波数为0~1),当波数逐渐增加时,均化系数从1逐渐降低到接近0;对于短波长的导轨条形状误差(波数为1~10),当波数靠近或者等于正整数时,均化系数取接近于0的最小值;当波数靠近或者等于正整数加0.5时,均化系数取小于0.25的局部最大值;结构参数中,封气边宽度对误差均化能力有很大影响,气垫间隙和小孔节流器孔径对误差均化能力基本无影响;当移动速度小于10 000 mm/s时,移动速度对误差均化能力的影响微弱。
In order to investigated the main influencing factors of the error averaging ability of the orifice-compensated air bearing,an error motion prediction model of a single air pad was established,and the defined averaging coefficient was used to discuss the quantitative relationship among the error motion of the air pad,the form error of the rail and the structural parameters of the air pad.The results show that,for the long waves of the rail form error(with wave number from 0 to 1),when the wave number gradually increases,the averaging coefficient gradually decreases from 1 to close to 0.For the short waves of the rail form error(with wave number from 1 to 10),when the wave number is close to or equal to a positive integer,the average coefficient takes the minimum value close to 0.And when the wave number is close to or equal to a positive integer plus 0.5,the average coefficient takes the local maximum value less than 0.25.Among the structural parameters,the width of the air land has a great influence on the error averaging ability,while the air pad gap and the diameter of the orifice restrictor basically have no influence on the error averaging ability.When the moving speed is less than 10 000 mm/s,the moving speed has a very weak influence on the error averaging ability.
作者
张朋海
ZHANG Penghai(College of Mechanical and Vehicle Engineering,Chongqing University,Chongqing 400044,China)
出处
《润滑与密封》
CAS
CSCD
北大核心
2024年第6期19-28,共10页
Lubrication Engineering
基金
重庆市自然科学基金项目(CSTB2022NSCQ-MSX0483)。
关键词
气浮轴承
均化系数
误差运动
形状误差
结构参数
air bearing
averaging coefficient
error motion
form error
structural parameters
