Sealing device for Stirling engine piston rod in which no separa

Details Sealing device for Stirling engine piston rod in which no separa Sealing device for Stirling engine piston rod in which no separa

1977-06-06

1979-03-27

Smith, Robert I.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277 15, F16J 1556

Patent

active

041462378

ABSTRACT:
In Stirling engines the high pressure of the cycle requires special seals on the piston rod to prevent leakage of gas out of the high pressure cylinder into lower pressure regions such as a crankcase. A liquid oil seal is developed in a chamber around the piston rod by movement of the piston rod to carry oil into the chamber which is limited by an upper scraper member and a lower sealing gland. The chamber leads to a membrane operated pressure comparison valve releasing oil from the chamber when its pressure exceeds that of the gas in the high pressure cylinder. No gas need be pumped back into the high pressure chamber and thus no separation of gas and oil is necessary.

REFERENCES:
patent: 3145995 (1964-08-01), Adamson et al.
patent: 3810634 (1974-05-01), Hakansson
patent: 3848877 (1974-11-01), Bengtsson
patent: 4083566 (1978-04-01), Bengtsson

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