主动控制狭缝节流气浮支承结构及承载特性研究  

Study on Structure and Bearing Characteristics of Air Bearing with Active Control Slit Throttling

作　　者：罗强 于普良[1,2] 胡回 姜庆 鲜小东 LUO Qiang;YU Puliang;HU Hui;JIANG Qing;XIAN Xiaodong(Key Laboratory of Metallurgical Equipment and Control Technology,Hubei Key Laboratory of Mechanical Transmission and Manufacturing Engineering,The State Key Laboratory of Refractories and Metallurgy,Wuhan University of Science and Technology,Wuhan Hubei 430081,China;Precision Manufacturing Institute,Wuhan University of Science and Technology,Wuhan Hubei 430081,China)

机构地区：[1]武汉科技大学冶金装备及控制教育部重点实验室,机械传动与制造工程湖北省重点实验室,省部共建耐火材料与冶金国家重点实验室,湖北武汉430081 [2]武汉科技大学精密制造研究院,湖北武汉430081

出　　处：《润滑与密封》2022年第2期30-36,43,共8页Lubrication Engineering

基　　金：国家自然科学基金项目(51705378);湖北省自然科学基金项目(2018CFB757);武汉科技大学国防预研基金项目(GF201908)。

摘　　要：为实现气浮支承承载性能的主动调节,设计一种主动控制狭缝节流气浮支承,可通过调节狭缝节流面积来调节气浮轴承承载力。建立气浮轴承CFD模型,运用动网格技术研究径向狭缝高度、供气压力和气膜厚度对气浮支承承载力的影响。结果表明:通过主动调节狭缝节流面积可以实现承载力的动态调节;增大狭缝节流面积可以增大承载力变化范围,增大供气压力、径向狭缝高度及减小气膜厚度可提高气浮支承静态承载力。所设计主动控制狭缝结构可以实现气浮支承承载性能的动态调节,为今后主动控制气浮支承的应用与发展奠定了理论基础。In order to realize the active control of the bearing capacity of the air bearing,an active control slit throttling air bearing was designed,which can adjust the bearing capacity of air bearing by adjusting the throttle area of the slot.The CFD model of air bearing was established,and the influence of the air supply pressure,radial slit height and air film thickness on the bearing capacity of air bearing was studied by using dynamic mesh technology.The results show that the dynamic adjustment of bearing capacity can be realized by actively adjusting the restrictor area of the slit.Increasing the restrictor area of the slit can increase the range of bearing capacity,and increasing the air supply pressure,radial slit height and air film thickness can improve the static bearing capacity of the air bearing.The designed active slit control structure can realize the dynamic adjustment of the bearing performance of the air bearing,which lays a theoretical foundation for the application and development of the active control of the air bearing in the future.

关 键 词：狭缝节流 承载力 节流面积 动网格 主动控制 气浮支承 

分 类 号：TH117.2[机械工程—机械设计及理论]