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Air bearing center cross gap of neutron stress spectrometersample table support system

Frontiers of Mechanical Engineering 2016年第4期11卷 403-411页

作者： Yang LI Yunxin WU Hai GONG Xiaolei FENG State Key Laboratory of High Performance Complex Manufacturing Changsha 410083 China College of Mechanical and ElectricalEngineering Central South University Changsha 410083 China Nonferrous Metal Oriented Advanced Structural Materials and Manu-facturing Cooperative Innovation Center Central South UniversityChangsha 410083 China

A support system is the main load-bearing component of sample table for neutron stress spectrometer, and air bearing is an important element of a support system. The neutron stress spectrometer sample table was introduced, and the scheme for air bearing combination was selected. To study the performance of air bearing center cross gap, finite element models (FEMs) were established based on air motion and Reynolds equations, effects of air supply pressure, and gap parameters on the overturning moment and bearing capacity of air bearing center cross gap were analyzed. Results indicate that the width, depth, and height differences of the marble floor gap played important roles in the performance of the air bearing. When gap width is lesser than 1 mm and gap depth is lower than 0.4 mm, bearing capacity and overturning moment would vary rapidly with the variation of the width and depth. A gap height difference results in the bearing capacity dropping rapidly. The FEM results agree well with experimental results. Further, findings of the study could guide the design of the support system and marble floor.

关键词： neutron stress spectrometer sample table support system air bearing center cross gap simulation experiment

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