环形进气锥腔结构静压气体轴承性能研究  

Characteristics of Externally Pressurized Gas Thrust Bearings with Tapered Chamber

作　　者：孙昂[1] 于贺春[2] 原彬[1] 刘慧贞[1] 

机构地区：[1]大连海事大学交通装备与海洋工程学院,辽宁大连116026 [2]中原工学院,河南郑州450007

出　　处：《润滑与密封》2015年第3期26-29,共4页Lubrication Engineering

基　　金：国家自然科学基金项目(51075048);中央高校基本科研业务费项目(3132014065);辽宁省科学研究项目(L2014206)

摘　　要：中心进气锥腔轴承承载力较高,但气腔容积较大,稳定性较差。对中心进气锥腔轴承结构进行改进,提出环形进气锥腔气体轴承;建立供气孔和轴承间隙组成的完整气体轴承流场,采用层流模式计算不同轴承结构参数时的压力分布、承载力和气容比,并计算优化结构的轴承的承载力和刚度。结果表明,在一定范围内增大锥腔高度和锥腔半径可以提高承载力,增大气容比;改进后的气体轴承承载力和刚度较高,气腔容积大大减小,稳定性提高。Center inlet gas bearings with tapered chamber have higher capacity, but big gas cavity and poor stability.The gas bearings with center inlet tapered chamber were improved, and a gas bearing with the annular inlet tapered chamber was proposed.The complete gas field consisting of supply hole and clearance was built up, and a laminar flow model was applied to calculate the pressure distribution, capacity and volume ratio in different structural parameters.The bearing capacity and stiffness of the optimized bearing structure was calculated.The results show that the load capacity and the gas volume ratio of gas bearings are increased with the increase of the height and radius of tapered recess in a certain range. The improved gas bearing has a high load capacity and stiffness,its gas cavity is decreased greatly, and its stability is increased.

关 键 词：气体轴承 狭缝节流 锥腔 

分 类 号：TH133.35[机械工程—机械制造及自动化]