IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0163711
(2005-10-27)
|
등록번호 |
US-7257940
(2007-08-21)
|
발명자
/ 주소 |
|
출원인 / 주소 |
|
인용정보 |
피인용 횟수 :
5 인용 특허 :
9 |
초록
▼
A method of pumping a fluid includes: providing a pressurizer for pressurizing the fluid, the pressurizer including at least two storage tanks, where, for each storage tank, the pressurizer includes a propellant entrance valve, a propellant exit valve, a pressurant entrance valve, and a pressurant e
A method of pumping a fluid includes: providing a pressurizer for pressurizing the fluid, the pressurizer including at least two storage tanks, where, for each storage tank, the pressurizer includes a propellant entrance valve, a propellant exit valve, a pressurant entrance valve, and a pressurant exit valve, where each of the storage tanks is configured to be filled with the fluid under a low pressure and drained of the fluid under a high pressure by the force of a pressurant; and for each storage tank, opening and closing its associated valves in cycles to sequentially fill and drain the storage tank of the fluid, the cycles each having a cycle time between approximately 1 and 500 milliseconds.
대표청구항
▼
What is claimed is: 1. A method of pumping a fluid, comprising: providing a pressurizer for pressurizing the fluid, the pressurizer comprising: at least two storage tanks, wherein, for each storage tank, the pressurizer further comprises: a propellant entrance valve connected to and associated with
What is claimed is: 1. A method of pumping a fluid, comprising: providing a pressurizer for pressurizing the fluid, the pressurizer comprising: at least two storage tanks, wherein, for each storage tank, the pressurizer further comprises: a propellant entrance valve connected to and associated with the storage tank; a propellant exit valve connected to and associated with the storage tank; a pressurant entrance valve connected to and associated with the storage tank; and a pressurant exit valve connected to and associated with the storage tank, wherein each of the storage tanks is configured to be filled with the fluid under a low pressure when its associated propellant entrance and pressurant exit valves are open and its associated propellant exit and pressurant entrance valves are closed, and to be drained of the fluid under a high pressure by the force of a pressurant when its associated propellant entrance and pressurant exit valves are closed and its associated propellant exit and pressurant entrance valves are open; and for each storage tank, opening and closing its associated valves in cycles to sequentially fill and drain the storage tank of the fluid, the cycles each having a cycle time between approximately 1 and 500 milliseconds. 2. The method as in claim 1, wherein the opening and closing are performed such that the cycles of the associated valves of the storage tanks are out of phase with each other, whereby at some time in which one storage tank is being filled with the fluid, at least one other storage tank is being drained of the fluid. 3. The method as in claim 1, wherein the cycles each have a cycle time between approximately 1 and 250 milliseconds. 4. The method as in claim 1, wherein the cycles each have a cycle time between approximately 1 and 100 milliseconds. 5. The method as in claim 1, wherein each of the associated valves of each of the storage tanks has an open time, which is the time required for a valve to move from a fully closed position to a fully open position, and a close time, which is the time required for a valve to move from a fully open position to a fully closed position, and wherein, for each storage tank and its associated valves, a sum of the following terms is less than approximately 25 milliseconds: a) a maximum of the pressurant entrance valve open time and the propellant exit valve open time; b) a maximum of the pressurant entrance valve close time and the propellant exit valve close time; c) the pressurant exit valve open time; d) the propellant entrance valve open time; and e) a maximum of the pressurant exit valve close time and the propellant entrance valve close time. 6. The method as in claim 1, wherein the associated pressurant exit valve for each storage tank has a total flow cross sectional area that is at least one-tenth of a maximum cross sectional area of the storage tank in a direction perpendicular to a flow direction of the fluid inside the storage tank. 7. The method as in claim 1, wherein at least one of the associated propellant exit valve and the associated propellant entrance valve for each storage tank has a total flow cross sectional area that is at least one-fourth of a maximum cross sectional area of the storage tank in a direction perpendicular to a flow direction of the fluid inside the storage tank. 8. A method of operating an impulse reaction engine system, comprising: providing an impulse reaction engine; and performing the method as claimed in claim 1, wherein the pressurizer is connected to the impulse reaction engine. 9. A method of pumping a fluid, comprising: providing a pressurizer for pressurizing the fluid, the pressurizer comprising: a storage tank; an accumulator; a propellant entrance valve connected to the storage tank; a propellant exit valve connected between the storage tank and the accumulator; a pressurant entrance valve connected to the storage tank; and a pressurant exit valve connected to the storage tank, wherein the storage tank is configured to be filled with the fluid under a low pressure when the propellant entrance and pressurant exit valves are open and the propellant exit and pressurant entrance valves are closed, and to be drained of the fluid under a high pressure by the force of a pressurant when the propellant entrance and pressurant exit valves are closed and the propellant exit and pressurant entrance valves are open, wherein the accumulator is configured to provide a substantially continuous flow of the fluid at the high pressure by filling with the fluid when the storage tank is draining of the fluid, and by draining of the fluid when the storage tank is filling with the fluid; and opening and closing the valves in cycles to sequentially fill and drain the storage tank of the fluid, the cycles each having a cycle time between approximately 1 and 500 milliseconds. 10. The method as in claim 9, wherein the cycles each have a cycle time between approximately 1 and 250 milliseconds. 11. The method as in claim 9, wherein the cycles each have a cycle time between approximately 1 and 100 milliseconds. 12. A method of operating an impulse reaction engine system, comprising: providing an impulse reaction engine; and performing the method as claimed in claim 9, wherein the pressurizer is connected to the impulse reaction engine. 13. A method of pumping a fluid, comprising: providing a pressurizer for pressurizing the fluid, the pressurizer comprising: at least one pressure vessel; a piston movable in the at least one pressure vessel; at least two pressurant entrance valves configured to be opened and closed out of phase with each other; at least two pressurant exit valves configured to be opened and closed out of phase with each other; at least two propellant entrance valves configured to be opened and closed out of phase with each other; and at least two propellant exit valves configured to be opened and closed out of phase with each other, wherein at least the at least two pressurant entrance valves and the at least two pressurant exit valves are connected to the at least one pressure vessel, wherein the pressurizer is configured to be filled with the fluid under a low pressure and to be drained of the fluid under a high pressure by the force of a pressurant; and opening and closing the at least two pressurant entrance valves, the at least two pressurant exit valves, the at least two propellant entrance valves, and the at least two propellant exit valves in cycles to sequentially fill and drain the pressurizer of the fluid so as to deliver a substantially continuous flow of the fluid, the cycles each having a cycle time between approximately 1 and 500 milliseconds. 14. The method as in claim 13, wherein the cycles each have a cycle time between approximately 1 and 250 milliseconds. 15. The method as in claim 13, wherein the cycles each have a cycle time between approximately 1 and 100 milliseconds. 16. A method of operating an impulse reaction engine system, comprising: providing an impulse reaction engine; and performing the method as claimed in claim 13, wherein the pressurizer is connected to the impulse reaction engine. 17. The method as in claim 13, wherein the piston comprises at least two piston portions connected by a connecting rod, wherein at least one of the piston portions is reciprocatingly movable along a substantially linear segment, and wherein at least one of the at least two pressurant entrance valves, the at least two pressurant exit valves, the at least two propellant entrance valves, and the at least two propellant exit valves is located along the segment. 18. The method as in claim 13, wherein the at least one pressure vessel comprises at least two pressure vessels, and wherein the at least two propellant entrance valves and the at least two propellant exit valves are connected to a same pressure vessel of the at least two pressure vessels. 19. The method as in claim 13, wherein at least one of the pressurant exit valves has a total flow cross sectional area that is at least one-tenth of a maximum cross sectional area of the at least one pressure vessel in a direction perpendicular to a flow direction of the fluid inside the at least one pressure vessel. 20. The method as in claim 13, wherein at least one of the propellant exit valves and propellant entrance valves has a total flow cross sectional area that is at least one-fourth of a maximum cross sectional area of the at least one pressure vessel in a direction perpendicular to a flow direction of the fluid inside the at least one pressure vessel.
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