Abstract
Stirling Technology Company (STC) is a leading developer of high efficiency, high reliability Stirling convertors for both space and commercial applications. STC has been working with the Department of Energy and NASA Glenn Research Center (GRC) to evolve this technology for many years. One key to the success of STC’s robust dynamic machines is their unique use of flexure bearings. STC flexures are optimized for each system application. STC relies on flexures to provide the majority of the axial spring rate, to provide radial spring rate to resist piston rubbing, and to provide mechanical centering forces without the use of centering gas ports. This paper provides some general design criteria that STC uses when designing a new flexure. Axial stiffness, radial stiffness, subassembly rocking modes, and flexure arm modes must all be considered for each new flexure design. This paper discusses the impact of critical flexure parameters to flexure behavior and system performance, and compares flexure test data to analytical predictions.
Published Version
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