权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

Research on Run-Out Characteristics of an Externally Pressurized Gas-Lubricated Journal Bearing

外压气体润滑轴颈轴承跳动特性研究

基本信息

批准号：
01550115
负责人：
YABE Hiroshi
金额：
$ 1.34万
依托单位：
Kyoto University
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1989
资助国家：
日本
起止时间：
1989 至 1990
项目状态：
已结题

项目摘要

The run-out characteristics of a rotor supported by an externally pressurized gas-lubricated journal bearing are investigated in this research with a special attention to the relation with the machining errors of the rotor and the bearing. The obtained results are summarized as follows :(1) The modified divergence formulation method to analyze the pressure distribution in the bearing clearance is established with taking into consideration the effect of divergent flow from discrete supply holes. The fundamental characteristics of the bearing with machining errors are studied by applying this method.(2) A theoretical model to account for the run-out of a rotor supported by an externally pressurized gas-lubricated journal bearing is proposed in which the machining errors such as out-of-roundness of the journal and size deviation of supply holes are attributed to cause the rotor run-out. Static and dynamic run-out characteristics are discussed on the basis of the calculated results.(3) A design criterion for maximum bearing stiffness, which is currently applied at the bearing design, is compatible with precision design criterion with respect to the rotor run-out.(4) The rotor run-out is determined mainly by out-of-roundness of the rotor, but is scarcely affected by the size deviation of the supply holes.(5) The run-out characteristics of the rotor are substantially related with the combination of the number of lobes of rotor cross-section, m, and the number of supply holes, k. The most critical situation for rotor run-out is such a case with m=k+1.

本文研究了静压气体轴承支承的转子的径向跳动特性，并着重分析了径向跳动特性与转子和轴承加工误差的关系。（1）考虑离散供油孔发散流的影响，建立了分析轴承间隙压力分布的修正发散公式法。应用该方法研究了存在加工误差时轴承的基本特性。(2)提出了一种气体静压滑动轴承支承的转子跳动的理论模型，该模型将轴颈不圆度和供油孔尺寸偏差等加工误差归结为转子跳动的原因。根据计算结果讨论了静态和动态跳动特性。(3)目前应用于轴承设计的最大轴承刚度的设计准则与关于转子跳动的精确设计准则是相容的。(4)转子跳动主要取决于转子的不圆度，而几乎不受供应孔尺寸偏差的影响。(5)转子的跳动特性基本上与转子横截面的叶片的数量m和供应孔的数量k的组合有关。转子跳动的最关键情况是m=k+1的情况。