Sibling cycle piston and valving method

Details Sibling cycle piston and valving method Sibling cycle piston and valving method

1989-10-10

1990-05-22

Ostrager, Allen M.

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...

60517, 60526, F02G 104

Patent

active

049266390

ABSTRACT:
A double-acting, rotating piston reciprocating in a cylinder with the motion of the piston providing the valving action of the Sibling Cycle through the medium of passages between the piston and cylinder wall. The rotating piston contains regenerators ported to the walls of the piston. The piston fits closely in the cylinder at each end of the cylinder except in areas where the wall of the cylinder is relieved to provide passages between the cylinder wall and the piston leading to the expansion and compression spaces, respectively. The piston reciprocates as it rotates. The cylinder and piston together comprise an integral valve that seqentially opens and closes the ports at the ends of the regenerators alternately allowing them to communicate with the expansion space and compression space and blocking that communication. The relieved passages in the cylinder and the ports in the piston are so arranged that each regenerator is sequentially (1) charged with compressed working gas from the compression space; (2) isolated from both expansion and compression spaces; (3) discharged of working gas into the expansion space; and (4) simultaneously charged with working gas from the expansion space while being discharged of working gas into the compression space, in the manner of the Sibling Cycle. In an alterate embodiment, heat exchangers are external to the cylinder and ports in the cylinder wall are alternately closed by the wall of the piston and opened to the expansion and compression spaces through relieved passages in the wall of the reciprocating, rotating piston.

REFERENCES:
patent: 4622813 (1986-11-01), Mitchell
patent: 4805408 (1989-02-01), Beale et al.
Gasser, M. G., Sherman, S. and Beale, W., "Developments Toward Achievement of a 3-5 Year Lifetime Stirling Cycle Refrigerator for Space Applications", (Publication date and source uncertain, but probably early 1980's).
West, Colin D., Principles and Applications of Stirling Engines, Van Nostrand Rheinhold, (New York 1986), p. 91.
Vincent, Ronald J., Rifkin, William D., & Benson, Glendon M., "Test Results of High Efficiency Stirling Machine Components", 17th IECEC, Paper 829362, (198).
Walker, G., Stirling Engines, Clarendon (Oxford, 1980), p. 116.
Philips Laboratories, "Design for Fabrication of a Long-Life Stirling Cycle Cooler for Space Application", Prepared for NASA Goddard Space Flight Center, Final Report for period Sep. 1978-Dec. 1982, Contract NAS5-25172, (Mar. 1983).
Stolfi, F., "Final Report for Parametric Testing of Engineering Model Refrigerator", Prepared for NASA Goddard Space Flight Center, Contract No. NAS5-26688.
Lilly, L. R. C., Diesel Engine Reference Book, Butterworths (London 1985, p. 10/7.

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