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...
Patent
1989-07-27
1990-11-06
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...
F02G 104
Patent
active
049675583
ABSTRACT:
A free piston Stirling cycle machine is illustrated by an engine that utilizes an axially movable displacer subjected to working gas pressures. A primary hydraulic circuit hydrostatically couples a displacer drive rod integral with the displacer to a counterbalance illustrated in the form of a scotch yoke. The counterbalance stabilizes and controls the Stirling cycle engine by constraining the displacer's reciprocating axial motion in a repetitive pattern. A throttling valve interposed in the primary hydraulic fluid circuit is used to adjustably resist displacer motion as required by engine operating conditions. A secondary hydraulic circuit is provided together with a bellows assembly between the working gas and power pistons to convert changes in working gas pressure to usable power output in the form of pumped hydraulic fluid.
REFERENCES:
patent: 3986360 (1976-10-01), Hagen et al.
patent: 4532766 (1985-08-01), White et al.
"Conceptual Design and Cost Analysis of Hydraulic Output Unit for 15KW Free-Piston Stirling Engine," White, Aug., 1982, title page through page 20.
Shaltens, "Advanced Stirling Conversion Systems for Terrestrial Applications," Mar. 22-27, 1987.
White et al., SAE paper 870104 "Practical Bellows Seals for Stirling Engines," Feb. 23-27, 1987.
Riggle, "Stability Characteristics of Stirling Engines," paper number 859386, Intersociety Energy Conversion Engineering Conference, Aug. 1985, pp. 3.313-3.319.
Riggle et al., "Stirling Engine Analysis Insights Derived from Sixteen Years of Artificial Heart Power Source Development," paper number 839124, Intersociety Energy Conversion Engineering Conference, Aug. 1983, pp. 766-772.
"Design of a Hydraulic Output Stirling Engine", Harvey et al., IECEC 1982 Proceeding, IECEC Paper No. 829294,pp. 1772-1777.
Emigh S. Grant
Riggle Peter
White Maurice A.
Ostrager Allen M.
Stirling Technology Company
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