Study on Precision Design of Externally Pressurized Gas-Lubricated Bearing and Guide Way

1.对外压气体轴承支承的横截面有不圆度误差转子的跳动特性进行了实验研究。实验结果验证了理论分析的正确性。2.介绍了轴承间隙内流动的理论模型，阐明了转子不圆度误差产生跳动的基本机理。3.从转子跳动的角度出发，提出了一种周向槽外压气体径向滑动轴承。实验结果与理论计算结果吻合较好。4.引入理论流动模型，分析了气体增压导轨中气体在轴承间隙内的流动情况。分析了转子或导轨存在随机分布的表面高度不规则性加工误差的情况下，转子或轴承瓦的运动精度特性。6.通过本文的研究工作，为静压气体轴承系统精度设计概念的提出奠定了理论基础。

1.The run-out characteristics of a rotor, which has out-of-roundness error in its crosssection, and is supported by an externally pressurized gas bearing, are investigated experimentally. The effects of number of lobes of out-of-roundness error, the bearing clearance, and the static load applied to the rotor are studied ; the experimental results confirm the validity of the theoretical analysis.2.Theoretical models for the flow in the bearing clearance are introduced, by which the essential mechanisms of occurence of rotor run-out by the out-of-roundness error are clarified.3.An externally pressurized gas journal bearing with circumferential grooves is proposed from the view point of run-out of the rotor. Experimental results show comparatively good agreements with theoretical ones for this type of the bearing.4.The gas flow in the bearing gap in an externally presurized gas-lubricated guide way is analyzed by introducing theoretical flow models. Some quantities, which may represent the expected moving accuracy characteristics of the rotor or the bearing pad, are proposed.5.The moving accuracy characteristics of the rotor or the bearing pad are analyzed under the condition that the rotor or the guide way rail have machining errors of surface height irregularities with random distibution.6.Theoretical background of precision design concept of externally pressurized gas bearing system may be established by this study work.