Power plants – Combustion products used as motive fluid – Combustion products generator
Patent
1992-07-21
1993-09-07
Bertsch, Richard A.
Power plants
Combustion products used as motive fluid
Combustion products generator
60734, F02C 7236
Patent
active
052418260
ABSTRACT:
A fluid pumping system that maintains the temperature rise at a minimum value of the fluid being recirculated in the pumps during a given operating condition in the pumping system's operating envelope be disclosed. A pair of positive displacement pumps judiciously sized at different capacities are driven by a differential pumping or gearing system that is driven by a single source and cooperates with a fluid circuit delivering flow to a receiver so that the relationship of the pressure in the fluid circuit bears a given relationship to the flow capacity produced by each pump at given operating points in the operating envelope. The circuit includes a resistance in one line leading to and from one of the pumps that exhibit different resistance to the flow when flowing in one direction as opposed to the flow in the reverse direction and a valve, responding to a control for attaining the demands placed on said receiver, in another flow line in the circuit controls the capacity of each of the pumps and hence the flow being delivered to the receiver. The system is particularly efficacious for controlling fuel flow to the combustor of a gas turbine engine used in aircraft or industrial applications.
REFERENCES:
patent: 2968348 (1961-01-01), Fortman
patent: 3215346 (1965-11-01), Albarani
patent: 4245964 (1981-01-01), Rannenberg
patent: 4760696 (1988-08-01), Rooks et al.
patent: 5116362 (1992-05-01), Arline et al.
patent: 5118258 (1992-06-01), Martin
patent: 5152146 (1992-10-01), Butler
Bertsch Richard A.
Friedland Norman
Thorpe Timothy S.
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