IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
UP-0321203
(2005-12-29)
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등록번호 |
US-7665305
(2010-04-09)
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발명자
/ 주소 |
- Cornwell, Michael D.
- Baxter, Randy C.
- Forst, Michael
- Goeke, Jerry L.
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출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
3 인용 특허 :
37 |
초록
▼
A valve assembly is disclosed for modulating the flow of fuel to a fuel nozzle at a high frequency or in a stepped manner to actively control combustion in a gas turbine engine which includes a valve housing defining an inlet portion for receiving fuel from a fuel source at an initial flow rate and
A valve assembly is disclosed for modulating the flow of fuel to a fuel nozzle at a high frequency or in a stepped manner to actively control combustion in a gas turbine engine which includes a valve housing defining an inlet portion for receiving fuel from a fuel source at an initial flow rate and an outlet portion for delivering fuel to a fuel nozzle at the initial flow rate or a modulated flow rate depending upon a detected combustion condition, and a mechanism disposed within the valve housing for modulating the flow rate of fuel to the outlet portion in response to a detected combustion condition.
대표청구항
▼
What is claimed is: 1. A valve assembly for controlling the flow of fuel to a fuel nozzle, the valve assembly comprising: a) a valve housing having an inlet portion for receiving fuel from a fuel source and an outlet portion for delivering fuel to a fuel nozzle; b) an elongated fixed valve shaft di
What is claimed is: 1. A valve assembly for controlling the flow of fuel to a fuel nozzle, the valve assembly comprising: a) a valve housing having an inlet portion for receiving fuel from a fuel source and an outlet portion for delivering fuel to a fuel nozzle; b) an elongated fixed valve shaft disposed within the valve housing and having a longitudinal axis; c) at least one valve rotor rotatably mounted on the fixed valve shaft and which oscillates about the axis of the fixed valve shaft between first and second magnetically latched positions to modulate the flow of fuel delivered to the fuel nozzle; and d) electromagnetic means for alternately latching the at least one valve rotor in the first and second magnetically latched positions. 2. A valve assembly as recited in claim 1, wherein the at least one valve rotor is configured to modulate the flow of fuel delivered to the fuel nozzle within a predetermined modulation range. 3. A valve assembly as recited in claim 1, wherein fuel from a fuel source is admitted into the outlet portion of the valve housing by the at least one valve rotor when the at least one valve rotor is in the first magnetically latched position and when the at least one valve rotor is in the second magnetically latched position fuel from a fuel source is not admitted into the outlet portion of the valve housing by the at least one valve rotor. 4. A valve assembly as recited in claim 1, wherein the at least one valve rotor is formed from a ferritic magnetic flux permeable material and is mounted for oscillatory movement between the first and second magnetically latched positions. 5. A valve assembly as recited in claim 1, further comprising spring means for alternately moving the at least one valve rotor from one magnetically latched position to another magnetically latched position. 6. A valve assembly as recited in claim 1, wherein the at least one valve rotor and the fixed valve shaft have corresponding fuel ports arranged so that when the at least one valve rotor is in the first magnetically latched position the fuel ports of the at least one valve rotor communicate with the fuel ports of the valve shaft, and when the at least one valve rotor is in the second magnetically latched position the fuel ports of the at least one valve rotor do not communicate with the fuel ports of the valve shaft. 7. A valve assembly as recited in claim 6, wherein the fuel ports in the fixed valve shaft communicate with a fuel passage formed on the interior of the fixed valve shaft so that when the at least one valve rotor is in the first magnetically latched position fuel flows into the fuel passage and then to the outlet portion of the valve housing, and when the at least one valve rotor is in the second magnetically latched position fuel does not flow into the fuel passage. 8. A valve assembly as recited in claim 5, wherein the spring means includes a plurality of coiled springs operatively associated the at least one valve rotor. 9. A valve assembly as recited in claim 5, wherein the spring means includes a torsion spring operatively associated with the at least one valve rotor. 10. A valve assembly as recited in claim 5, wherein the spring means includes a cantilever spring operatively associated with the at least one valve rotor. 11. A valve assembly as recited in claim 1, wherein the electromagnetic means includes first and second magnetic flux paths. 12. A valve assembly as recited in claim 11, wherein the at least one valve rotor rotates in a first direction to the first magnetically latched position when the first magnetic flux path is energized and wherein the at least one valve rotor rotates in a second direction to the second magnetically latched position when the second magnetic flux path is energized. 13. A valve assembly as recited in claim 11, wherein the at least one valve rotor is adapted for movement into a neutral position between the first and second magnetically latched positions when the electromagnetic means are de-energized. 14. A valve assembly as recited in claim 1, wherein the at least one valve rotor has a generally cylindrical body portion configured for mounting on the fixed valve shaft, and a pair of diametrically opposed paddles extending radially outwardly from the generally cylindrical body portion to interact with the electromagnetic means. 15. A valve assembly as recited in claim 7, wherein means are provided in the fixed valve shaft, in communication with the fuel passage formed therein, to establish a fluidic bearing between an exterior surface of the fixed valve shaft and an interior surface of the at least one valve rotor. 16. A valve assembly as recited in claim 7, wherein a plurality of valve rotors are arranged within the valve housing, and each valve rotor is configured to produce a different fuel flow condition relative to the fixed valve shaft in dependence upon the configuration of the corresponding fuel ports associated therewith. 17. A valve assembly as recited in claim 16, wherein the plurality of valve rotors are mounted on a single fixed valve shaft in axial succession. 18. A valve assembly as recited in claim 16, wherein each of the plurality of valve rotors is mounted on a separate fixed valve shaft. 19. A valve assembly for modulating the flow of fuel to a fuel nozzle to actively control combustion in a gas turbine engine, the valve assembly comprising: a) a valve housing having an inlet portion for receiving fuel from a fuel source at an initial fuel flow rate, and an outlet portion for delivering fuel to a fuel nozzle at the initial fuel flow rate or at a modulated fuel flow rate depending upon a detected combustion condition; b) a primary fuel path defined within the valve housing and extending between the inlet portion and the outlet portion for conducting fuel through the valve housing; c) a valve shaft disposed within the valve housing and having a secondary fuel passage formed therein in fluid communication with the outlet portion of the valve housing; d) a valve rotor mounted for oscillatory movement on the valve shaft between a first magnetically latched position wherein fuel from the primary fuel path is admitted into the secondary fuel passage in the valve shaft for delivery to the outlet portion and a second magnetically latched position wherein fuel from the primary fuel path is prohibited from entering the secondary fuel passage in the valve shaft; e) electromagnetic means for alternately latching the valve rotor in the first and second magnetically latched positions to modulate the flow rate of the fuel delivered to a fuel nozzle in response to a detected combustion condition; and f) spring means for alternately moving the valve rotor from one magnetically latched position to another magnetically latched position. 20. A valve assembly as recited in claim 19, wherein the valve rotor and valve shaft have corresponding fuel ports arranged so that when the valve rotor is in the first magnetically latched position the fuel ports of the valve rotor communicate with the fuel ports of the valve shaft, and when the valve rotor is in the second magnetically latched position the fuel ports of the valve rotor do not communicate with the fuel ports of the valve shaft. 21. A valve assembly as recited in claim 20, wherein the fuel ports in the valve shaft communicate with the fuel passage formed in the valve shaft. 22. A valve assembly as recited in claim 19, wherein the spring means includes a plurality of coiled springs operatively associated the at least one valve rotor. 23. A valve assembly as recited in claim 19, wherein the spring means includes a torsion spring operatively associated with the at least one valve rotor. 24. A valve assembly as recited in claim 19, wherein the spring means includes a cantilever spring operatively associated with the at least one valve rotor. 25. A valve assembly as recited in claim 19, wherein the electromagnetic means includes first and second magnetic flux paths. 26. A valve assembly as recited in claim 25, wherein the valve rotor moves in a first direction to the first magnetically latched position when the first magnetic flux path is energized and wherein the valve rotor moves in a second direction to the second magnetically latched position when the second magnetic flux path is energized. 27. A valve assembly as recited in claim 19, wherein the valve rotor is adapted for movement into a neutral position when the electromagnetic means are de-energized so as to achieve a mean fuel flow condition between the primary fuel path and the fuel passage formed in the valve shaft. 28. A valve assembly as recited in claim 19, wherein the valve rotor has a generally cylindrical body portion configured for mounting on the valve shaft, and a pair of diametrically opposed paddles extending radially outwardly from the body portion to interact with the electromagnetic means. 29. A valve assembly as recited in claim 28, wherein the valve rotor is formed from a ferritic magnetic flux permeable material. 30. A valve assembly as recited in claim 28, wherein means are formed in the valve shaft, in communication with the fuel passage formed therein, to establish a fluidic bearing between the exterior surface of the valve shaft and an interior surface of the cylindrical body portion of the valve rotor supporting the oscillatory movement of the valve rotor. 31. A valve assembly as recited in claim 20, wherein a plurality of valve rotors are arranged within the valve housing, each on a respective valve shaft, and each valve rotor is adapted and configured to produce a unique fuel flow condition relative to the valve shaft associated therewith in dependence upon the configuration of the corresponding fuel ports associated therewith.
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