Abstract
Flexure bearings are widely used in linear compressors because of their high radial stiffness and long life. In this paper, a Finite Element Method (FEM) is employed to analyze the characteristics of Oxford and triangle flexure bearings. These two kinds of plate springs are analyzed separately by changing the load, thickness and width of the spring arm, and the FEM calculation results in the form of stress and displacement contour plots are shown here. In order to avoid the resonant frequency of the linear compressor, a modal analysis is employed to illustrate the natural frequency of flexure bearings. The characteristics calculated by the numerical process fit well with the experimental results. Under the same basic structure, the triangular flexure bearing provides a larger radial/axial stiffness ratio and a higher natural frequency, which is conductive to the lightweight objective for the entire cryocooler system.
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