Centrifugal piston expander

Details Centrifugal piston expander Centrifugal piston expander

1983-11-22

1985-04-30

Capossela, Ronald C.

Refrigeration

Processes

Reducing pressure on compressed gas

62402, 62499, 165 86, F25B 900

Patent

active

045135754

ABSTRACT:
The improved method and apparatus for operating a centrifugal piston expander of the type wherein a free piston is mounted in a rotating fluid pressure chamber having a longitudinal axis that is non-radial with respect to the axis of rotation, but extends from a position remote from the rotation axis to a position proximate to the rotation axis. To bring the free piston to a cushioned stop when it is moving radially inwardly under the influence of applied gas pressure, a normally open exhaust valve in the inner end of the fluid pressure chamber is closed to trap a column of gas in the path of the oncoming piston. After the inward motion of the piston is arrested, the valve may be opened to exhaust the trapped gas or may be maintained closed for a brief period to permit the energy stored in the trapped gas to initiate the acceleration of the piston in its return outward movement.

REFERENCES:
patent: 4022032 (1977-05-01), Nott

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