高速运行条件下静压气浮导轨摩擦力分析  

Friction Force Analysis for Aerostatic Guideway under High Speed Conditions

作　　者：李鹏飞[1] 刘宏昭[1] 陈洪波[1] 余守旗 

机构地区：[1]西安理工大学,西安710048 [2]西安标准工业股份有限公司,西安710077

出　　处：《中国机械工程》2010年第13期1590-1593,共4页China Mechanical Engineering

基　　金：国家科技重大专项项目(2009ZX04014-015);国家自然科学基金资助项目(50575180);陕西省重点学科建设专项基金资助项目

摘　　要：以静压气浮导轨为研究对象,对导轨气浮块底部气体压力的二维分布规律及影响摩擦力的因素进行了理论分析。在气浮块气膜受力分析的基础上,推导了单孔和多孔矩形气浮块底部气体压力的二维分布方程、气浮导轨摩擦力方程,获得了速度与摩擦力之间的关系。以三坐标测量机为实例进行仿真,结果表明高速运行条件下静压气浮导轨的摩擦力降低了三坐标测量机的定位精度,且其对系统运动速度的影响不可忽略。Aimed at aerostatic guideway,a two dimensional distribution of air pressure and effect factor on the friction force were analyzed under high speed working conditions.The equation of the friction force and the two dimensional air pressure distribution at the bottom of the aerostatic pad with onehole or multi-hole were deduced based on the force analysis of air film.The relationship between the friction force and the speed of the aerostatic guideway was obtained.Under the high speed working conditions,the simulation of the friction force acting on the three-coordinate measuring machine was performed to study the effectiveness on speed precision.The results show that the influence of friction force acting on the aerostatic guideway reduces the position accuracy of the three-coordinate measuring machine,and cannot be ignored under the high speed working conditions.

关 键 词：静压气浮导轨 二维压力分布 摩擦力 高速运行 

分 类 号：TG502.16[金属学及工艺—金属切削加工及机床]