Squeeze film bearing for Stirling cycle compressor pistons

Details Squeeze film bearing for Stirling cycle compressor pistons Squeeze film bearing for Stirling cycle compressor pistons

1987-01-21

1988-07-05

Warner, Steven E.

Refrigeration

Gas compression, heat regeneration and expansion, e.g.,...

60520, F25B 900

Patent

active

047546085

ABSTRACT:
In a compression piston, the wrist pin clearance bearing is lubricated by gas from the volume of working gas. The clearance bearing is formed by a wrist pin positioned within a pinhole of the piston. During reciprocation of the piston, the wrist pin oscillates in the piston pinhole and compresses the gas therein. The compression produces a squeeze film which prevents contact between the wrist pin and piston. The stroke time of the piston is not long enough during a cycle to collapse the squeeze film. The gas squeeze film thus lubricates the wrist pin clearance bearing. A clearance seal is formed between the piston and a cylinder of the piston housing. The clearance seal is of small clearance relative to the clearance bearing so that it limits leakage by the wrist pin. The small clearance seal also enables the requisite pressure buildup within the pinhole to generate an adequate squeeze film about the clearance bearing.

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