气浮主轴轴向闭式支承系统静特性数值分析  

Numerical Analysis on Static Characteristics of Axial Double Thrust Bearing System for Aerostatic Spindle

作　　者：喻丽华[1] 谢庆生[1] 黄海松[1] 

机构地区：[1]贵州大学贵州省现代制造教育部重点实验室,贵州贵阳550003

出　　处：《润滑与密封》2014年第9期23-29,共7页Lubrication Engineering

基　　金：国家科技支撑计划项目(2012BAF12B14)

摘　　要：求解气体润滑问题的最大难点在于如何获得雷诺方程的精确解。为了提高气浮主轴轴向支承系统的设计精度,在建立小孔节流气体静压止推轴承润滑数学模型的基础上,运用有限元方法对雷诺方程进行离散化。基于MATLAB7.0工具平台,采用超松弛迭代法,开发求解气体静压止推轴承压力方程与静特性的数值仿真软件。以某气浮主轴轴向闭式支承系统静特性参数设计为例,通过数值仿真,获得单侧止推轴承润滑气膜的压力分布,及不同节流孔直径与不同供气压力下的静特性性能;以刚度最大为优化目标,确定该气浮主轴止推轴承的结构参数与操作参数,并由此获得闭式支承系统的静特性。It is very difficult to acquire the exact solution of Reynolds equation when solving aerostatic lubrication prob-lem.In order to improve the design accuracy of axial bearing system for aerostatic spindle,the mathematics model of aero-static thrust bearing with orifice compensated was established.Reynolds equation in cylindrical coordinate was discretized based on the finite element method.A numerical simulation software was developed to solve the pressure equations and static characteristics of aerostatic thrust bearing in the super relaxation iteration method on the basis of MATLAB7.0 tools. Taking axial double thrust bearings of a aerostatic spindle as an example,the pressure distribution of gas film were ob-tained by numerical simulation,and static characteristics at different feedhole diameter and gas supply pressure were also obtained.The structure parameters and operation parameter were optimized in order to maximize the stiffness of the gas bearing,and the static characteristics of the double thrust bearings were educed.

关 键 词：气浮主轴 静压气体止推轴承 静态特性 

分 类 号：TH133.3[机械工程—机械制造及自动化]