Free-piston type stirling engine
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United States of America Patent
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Jun 21, 2016
Grant Date -
Aug 7, 2014
app pub date -
Sep 13, 2012
filing date -
Sep 16, 2011
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Abstract
A free-piston type stirling engine 1 includes a power piston 30 which partitions the inside of a case 2 into a work space 80 and a bounce space 90, a displacer 40, a communication hole 32 provided in the power piston 30, a displacer rod 41 extending from the displacer 40 and passing through the communication hole 32, a first displacer supporting spring 50 elastically supporting the displacer rod 41 at its proximal end, and a second displacer supporting spring 60 elastically supporting the displacer rod 41 at its distal end. The power piston 30 and the displacer 40 reciprocate along a central axis X of the case 2 with a phase difference therebetween by expansion and compression of a working gas in the work space 80, and bias forces of the first displacer supporting spring 50 and the second displacer supporting spring 60 restrict tilting of the displacer 40 and the displacer rod 41 with respect to the central axis X.
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