进口效应对小孔节流静压空气轴承静特性的影响  

Entrance Effect on Static Characteristics of Orifice Compensated Aerostatic Bearings with Feed Pocket

作　　者：龙威[1] 包钢[1] 

机构地区：[1]哈尔滨工业大学机电学院,哈尔滨150001

出　　处：《轴承》2010年第7期31-35,共5页Bearing

摘　　要：小孔节流空气静压轴承中,由于进口效应现象的存在导致轴承气膜内实际压力分布不再符合传统的层流假设。以气体润滑理论为基础,建立完整描述轴承气膜的数学模型,寻找导致小孔节流空气静压止推轴承中进口效应的形成原因,分析供气孔处气腔直径和气腔深度不同对轴承表面压力分布和轴承静载荷能力的影响规律,通过数值计算和试验对比对理论分析的结果给予验证。For orifice compensated aerostatic bearings,entrance effect leads differences between actual pressure distributions and traditional laminar flow assumption in gas film of the bearings.Based on gas lubrication theory,fulfilled mathematic model of the gas film is presented,which make it possible to find the cause of entrance effect.This paper presents regularities for change of pressure distribution and load capacity of circular aerostatic thrust bearing when pocket diameter and pocket depth vary.The theoretical research is verified with the numeric calculation and experiment.

关 键 词：空气静压止推轴承 小孔节流 进口效应 

分 类 号：TH133.35[机械工程—机械制造及自动化]