| 摘要 |
PROBLEM TO BE SOLVED: To effectively prevent foreign matter from being bitten in a sliding clearance in the periphery of a power piston, in a Stirling engine. SOLUTION: This Stirling engine includes: a displacer piston; the power piston 7 disposed below the displacer piston; a regenerator interposed in a working medium passage connecting an expansion chamber defined above the displacer piston to a compression chamber defined between the displacer piston and the power piston; a heating means heating the working medium led to flow into the expansion chamber; and a cooling means cooling the working medium led to flow into the compression chamber. An annular recessed groove 7a for receiving the foreign matter is formed in the peripheral edge of the upper end surface of the power piston 7. COPYRIGHT: (C)2011,JPO&INPIT
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