Stirling engine displacer gas bearing

Power plants – Motor operated by expansion and/or contraction of a unit of... – Unit of mass is a gas which is heated or cooled in one of a...


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60517, F02G 104




A gas bearing for the axially reciprocating displacer and power piston members in a free piston Stirling engine includes a bearing sleeve having a pair of interconnected annular pressure plenums formed by ribs on the outer surface of the sleeve which form a seal with the inner walls of a cylinder in which the sleeve is seated. The outer side of the raised ribs provide a second set of interconnecting drain plenums. A source of a high pressure gas, pressurized internally by the engine itself, is connected to the pressure plenum which communicates with the axially reciprocating members through a multitude of narrow orifices. The bearing gas is drained into the second or drained plenum through a large number of larger sized orifices.

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