机械制造与自动化
機械製造與自動化
궤계제조여자동화
Machine Building & Automation
2015年
5期
29-30,35
,共3页
气体挤压膜%边界条件%压力%速度
氣體擠壓膜%邊界條件%壓力%速度
기체제압막%변계조건%압력%속도
gas squeeze film%boundary condition%pressure%velocity
气体挤压膜轴承是一种新型的非接触式气体支承方式,该支承方式的支承性能主要由间隙内的气膜压力分布决定,而气膜压力的分布需要通过求解气体雷诺方程得到。边界条件对气体挤压膜的压力分布的求解有着显著影响,因此,确定一个与实际条件接近的边界条件非常必要。通过流体动力分析方法分析两种不同边界区域边界压力的变化,给出了新边界条件下间隙内的压力和速度分布,结果表明新边界条件作用时,间隙内气体与外界环境气体交换时压力与速度的变化是连续的。
氣體擠壓膜軸承是一種新型的非接觸式氣體支承方式,該支承方式的支承性能主要由間隙內的氣膜壓力分佈決定,而氣膜壓力的分佈需要通過求解氣體雷諾方程得到。邊界條件對氣體擠壓膜的壓力分佈的求解有著顯著影響,因此,確定一箇與實際條件接近的邊界條件非常必要。通過流體動力分析方法分析兩種不同邊界區域邊界壓力的變化,給齣瞭新邊界條件下間隙內的壓力和速度分佈,結果錶明新邊界條件作用時,間隙內氣體與外界環境氣體交換時壓力與速度的變化是連續的。
기체제압막축승시일충신형적비접촉식기체지승방식,해지승방식적지승성능주요유간극내적기막압력분포결정,이기막압력적분포수요통과구해기체뢰낙방정득도。변계조건대기체제압막적압력분포적구해유착현저영향,인차,학정일개여실제조건접근적변계조건비상필요。통과류체동력분석방법분석량충불동변계구역변계압력적변화,급출료신변계조건하간극내적압력화속도분포,결과표명신변계조건작용시,간극내기체여외계배경기체교환시압력여속도적변화시련속적。
Gas squeeze film bearing is a new non-contact gas bearing, its supporting performance deperds on the film pressure in the gas squeeze film gap. The distribution of pressure is obtained by solving the Reynolds equation with squeeze term. Because the boundary condition has influence on its pressure distribution greatly, it is important to defermine it. This paper analyzes the variation of two different boundaries by fluid dynamic analysis method and obtains the distribution of the pressure and velocity in the gap of the new boundary. The result shows that, the pressure and velocity vary continuously in exchange of the gap and external gas in the new boundary.