南京航空航天大学学报2011，Vol.43Issue(1)：79-85,7.
3种不同形式的板弹簧性能分析
Performance Analysis of Three Type Flexure Bearings for Linear Compressors
摘要
Abstract
The flexure bearings are one of the key components with long life, high reliable stirling cryocoolers for the aerospace use. The large radial stiffness of the spring provides a support for piston to ensure it works in a non-contact way with cylinder. The small axial stiffness of the flexure bearing ensures the piston working freely in the cylinder. The largest axial displacement is limited by the material fatigue limit restrictions. Because of the absence of the piston ring, the seal between the cylinder and the back volume is pressurized by the clearance gap, thus improving the piston and cylinder assembly technology. In this paper, three common flexure bearings including concentric flexure bearings, eccentric flexure bearings and linear arm flexure bearings are analyzed by FEM software. By changing the load,the thickness and the width of flexure bearing, the three types of plate spring are solved, and results of stress and displacement contours are shown. By using the modal analysis, the natural frequency is obtained to avoid the resonance nature frequency of spring. Analysis results show that on the same basic structure, the linear arm flexure bearings provide the largest axial and radial stiffness, and the highest natural frequency, thus it is conductive to the lightweight of the whole cryocooler system in aerospace use.关键词
线性压缩机/板弹簧/有限元/刚度/应力/固有频率Key words
linear compressor/ flexure spring/ FEM method/ axial and radical stiffness/ stress/ nature frequency分类
通用工业技术引用本文复制引用
周文杰,王龙一,甘智华,吴英哲,李一汀,邱利民..3种不同形式的板弹簧性能分析[J].南京航空航天大学学报,2011,43(1):79-85,7.基金项目
国家自然科学基金(50876094))资助项目 （50876094）
国家"九七三"计划(2010CB227303)资助项目. （2010CB227303）
