Power sensing regenerator
First Claim
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1. A regenerator for use in a system conveying fluid power as a flow of fluid under pressure to one or more loads comprising:
- first and second displacers that are mechanically connected with each other for dividing the flow of fluid into predetermined proportions;
said first and second displacers having an inlet and respective outlets;
first and second flow control valves for regulating different portions of the flow of fluid to the one or more loads;
said first and second flow control valves having respective inlets and outlets;
a first working line for connecting a supply of the flow of fluid to said inlet of the displacers at a first pressure;
second and third working lines for respectively connecting said outlets of the displacers to said inlets of the first and second flow control valves at second and third pressures; and
a control system responsive to a difference between said second and third pressures for reducing said first pressure with respect to a higher of said second and third pressures.
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Abstract
A power sensing regenerator includes a pair of displacers (24 and 26) connected in tandem for dividing a flow of fluid from a pump (12) into predetermined proportions for servicing one or more loads (42). Flow control valves (32 and 34) regulate respective flows from the displacers (24 and 26) to the one or more loads (42). A control system, which includes differential pressure regulators of the flow control valves (32 and 34), responds to a difference between discharge pressures of the displacers (24 and 26) for reducing discharge pressure of the pump (12).
37 Citations
55 Claims
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1. A regenerator for use in a system conveying fluid power as a flow of fluid under pressure to one or more loads comprising:
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first and second displacers that are mechanically connected with each other for dividing the flow of fluid into predetermined proportions; said first and second displacers having an inlet and respective outlets; first and second flow control valves for regulating different portions of the flow of fluid to the one or more loads; said first and second flow control valves having respective inlets and outlets; a first working line for connecting a supply of the flow of fluid to said inlet of the displacers at a first pressure; second and third working lines for respectively connecting said outlets of the displacers to said inlets of the first and second flow control valves at second and third pressures; and a control system responsive to a difference between said second and third pressures for reducing said first pressure with respect to a higher of said second and third pressures. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34)
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35. A fluid pumping system for supplying a flow of fluid to a plurality of loads comprising:
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a variable displacement pump for supplying the flow of fluid to first and second loads; first and second displacers that are mechanically connected to each other for displacing predetermined portions of the flow of fluid supplied by the variable displacement pump; first and second flow control valves for controlling respective flows of fluid from said first and second displacers to the first and second loads; a first working line for conducting the flow of fluid from the variable displacement pump to said first and second displacers at a first pressure; second and third working lines for conducting the respective flows of fluid from said first and second displacers to said first and second flow control valves at second and third pressures; fourth and fifth working lines for further conducting the respective flows of fluid from said first and second flow control valves to the first and second loads at fourth and fifth pressures; and a pump control for maintaining a predetermined operating pressure differential across one of said first and second flow control valves having a higher of said second and third pressures and a higher of said fourth and fifth pressures by varying displacements of said variable displacement pump. - View Dependent Claims (36, 37, 38, 39, 40, 41, 42, 43)
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44. A fluid circuit for saving energy in a fluid pumping system having a variable displacement pump for supplying a flow of fluid under pressure to three or more loads comprising:
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first, second, and third displacers that are mechanically connected with each other for dividing the flow of fluid into predetermined proportions; first, second, and third flow control valves for controlling respective flows of fluid from said first, second, and third displacers to first, second, and third loads; a first working line for conducting the flow of fluid from the variable displacement pump to said first, second, and third displacers at a first pressure; second, third, and fourth working lines for conducting the respective flows of fluid from said first, second, and third displacers to said first, second, and third flow control valves at second, third, and fourth pressures; fifth, sixth, and seventh working lines for further conducting the respective flows of fluid from said first, second, and third flow control valves to the first, second, and third loads at fifth, sixth, and seventh pressures; and first, second, and third recirculating lines for diverting excess flows of fluid from said fifth, sixth, and seventh working lines to said first working line. - View Dependent Claims (45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55)
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Specification