IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0894578
(2010-09-30)
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등록번호 |
US-8371105
(2013-02-12)
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발명자
/ 주소 |
- Glynn, Christopher Charles
- Zatorski, Darek Tomasz
- Yeager, Donald Scott
- Dinsmore, Nicholas Rowe
- Menard, Jeffrey Raymond
- Miller, Brandon Wayne
|
출원인 / 주소 |
|
인용정보 |
피인용 횟수 :
4 인용 특허 :
13 |
초록
▼
Spaced apart counter-rotatable forward and aft rows of forward and aft propellers are mounted on forward and aft rotatable frames. Hydraulic rotary forward and aft pitch change actuators on the frames are operable for controlling pitch of the propellers. A hydraulic fluid supply outboard of the fram
Spaced apart counter-rotatable forward and aft rows of forward and aft propellers are mounted on forward and aft rotatable frames. Hydraulic rotary forward and aft pitch change actuators on the frames are operable for controlling pitch of the propellers. A hydraulic fluid supply outboard of the frames is connected to forward and aft rotary unions which are operable for transferring hydraulic fluid between forward and aft union stators to forward and aft union rotors mounted within the forward and aft rotary unions. The forward union rotor is operable to transfer the hydraulic fluid from the forward rotary union to the aft pitch change actuators and the aft union rotor is operable to transfer the hydraulic fluid from the aft rotary unions to the forward pitch change actuators. The forward and aft rotatable frames counter-rotatably mounted on a structural frame located forward or aft of the propellers.
대표청구항
▼
1. A propulsion apparatus comprising: axially spaced apart counter-rotatable forward and aft rows of forward and aft propellers mounted on forward and aft rotatable frames respectively and rotatable about a centerline axis,an exhaust flowpath which passes through the forward and aft rotatable frames
1. A propulsion apparatus comprising: axially spaced apart counter-rotatable forward and aft rows of forward and aft propellers mounted on forward and aft rotatable frames respectively and rotatable about a centerline axis,an exhaust flowpath which passes through the forward and aft rotatable frames,forward and aft pitch change systems including hydraulic forward and aft pitch change actuators mounted on the forward and aft rotatable frames and connected to and operable for controlling and setting pitch of the forward and aft propellers respectively,a hydraulic fluid supply mounted outboard of the forward and aft rotatable frames and hydraulically connected to forward and aft rotary unions including forward and aft union rotors mounted within forward and aft union stators respectively,the forward and aft rotary unions operable for transferring hydraulic fluid between the forward and aft union stators and the forward and aft union rotors respectively, the forward union rotor hydraulically connected to the aft pitch change actuators for transferring the hydraulic fluid from the forward rotary union to the aft pitch change actuators, andthe aft union rotor hydraulically connected to the forward pitch change actuators for transferring the hydraulic fluid from the aft rotary union to the forward pitch change actuators. 2. A propulsion apparatus as claimed in claim 1, further comprising the forward and aft rotary unions axially spaced apart and operable for transferring the hydraulic fluid radially inwardly and outwardly between the forward and aft union stators and the forward and aft union rotors respectively. 3. A propulsion apparatus as claimed in claim 2, further comprising forward and aft drive shafts drivingly connected to the forward and aft rotatable frames respectively and the aft union rotor including an annular rotor body integral with the forward drive shaft. 4. A propulsion apparatus as claimed in claim 1, further comprising: forward and aft rotatable struts of the forward and aft rotatable frames respectively extending radially across the exhaust flowpath,the forward and aft pitch change actuators being hydraulic rotary actuators and mounted radially inwardly of the exhaust flowpath in a one to one ratio with the forward and aft rotatable struts of the forward and aft rotatable frames respectively, andforward and aft rotatable shafts extending through the forward and aft rotatable struts and connecting the forward and aft pitch change actuators to the forward and aft propellers respectively in a one to one ratio. 5. A propulsion apparatus as claimed in claim 4, further comprising the forward and aft rotary unions operable for transferring hydraulic fluid radially inwardly and outwardly between the forward and aft union stators and the forward and aft union rotors respectively. 6. A propulsion apparatus as claimed in claim 5, further comprising forward and aft drive shafts drivingly connected to the forward and aft rotatable frames respectively and the aft union rotor including an annular rotor body integral with the forward drive shaft. 7. A propulsion apparatus as claimed in claim 6, further comprising: the forward union rotor extending aftwardly through the aft union rotor,the aft union rotor including an annular rotor body integral with the forward drive shaft,the forward and aft union rotors respectively carrying at least in part fluid passageways,the fluid passageways carried by the forward union rotor in fluid communication with the hydraulic fluid forward supply and return lines and the aft supply and return rotatable lines respectively, andthe fluid passageways carried by the annular rotor body within the aft union rotor in fluid communication with the hydraulic fluid aft supply and return lines and the forward supply and return rotatable lines respectively. 8. A propulsion apparatus as claimed in claim 7, further comprising: each of the forward and aft union stators including at least first and second fluid chambers having at least first and second stator channels respectively extending radially outwardly from and open through an annular radially inner stator surface of the forward and aft union stators,each of the fluid chambers having at least one inlet port connected to the hydraulic fluid supply, andthe fluid passageways in fluid communication with the fluid chambers. 9. A propulsion apparatus as claimed in claim 8, further comprising: the aft union rotor including an annular rotor stator race mounted on the annular rotor body,a radially outer rotor surface of the annular rotor stator race in slidably sealing engagement with the inner stator surface,transfer holes in fluid communication with the fluid chambers and radially extending entirely through the annular rotor stator race and the annular rotor body to an annular rotary manifold mounted to the annular rotor body,the transfer holes in fluid communication with the fluid passageways extending axially aftwardly through the rotary manifold, andthe fluid passageways including intermediate tubes in part connecting portions of the fluid passageways in the rotary manifold to radial sections of the fluid passageways. 10. A propulsion apparatus as claimed in claim 1, further comprising: the forward and aft rotary unions integrated in a single nested rotary union,the forward and aft union stators integrated in a common single stator, andthe nested rotary union operable for transferring hydraulic fluid radially inwardly and outwardly between the common single stator and the forward and aft union rotors. 11. A propulsion apparatus as claimed in claim 10, further comprising: a flowpath which passes through the forward and aft rotatable frames,forward and aft rotatable struts of the forward and aft rotatable frames respectively extending radially across the exhaust flowpath,the forward and aft pitch change actuators being hydraulic rotary actuators and mounted radially inwardly of the flowpath in a one to one ratio with the forward and aft rotatable struts of the forward and aft rotatable frames respectively, andforward and aft rotatable shafts extending through the forward and aft rotatable struts and connecting the forward and aft pitch change actuators to the forward and aft propellers respectively in a one to one ratio. 12. An aircraft gas turbine engine comprising: a gas generator upstream and operable to power a power turbine,a nacelle surrounding at least the gas generator,axially spaced apart counter-rotatable forward and aft rows of forward and aft propellers mounted on forward and aft rotatable frames respectively and rotatable about a centerline axis,the power turbine drivingly connected to the forward and aft rotatable frames,forward and aft pitch change systems including hydraulic forward and aft pitch change actuators mounted on the forward and aft rotatable frames and connected to the forward and aft propellers and operable for controlling and setting pitch of the forward and aft propellers respectively,a hydraulic fluid supply mounted outboard of the forward and aft rotatable frames and connected to forward and aft rotary unions,the forward and aft rotary unions including forward and aft union rotors mounted within forward and aft union stators and operable for transferring hydraulic fluid between the forward and aft union stators and the forward and aft rotary union rotors respectively,the forward union rotor hydraulically connected and operable to transfer the hydraulic fluid to the aft pitch change actuator, andthe aft union rotor hydraulically connected and operable to transfer the hydraulic fluid to the forward pitch change actuator. 13. An engine as claimed in claim 12, further comprising: a flowpath which passes through the forward and aft rotatable frames,forward and aft rotatable struts of the forward and aft rotatable frames respectively extending radially across the exhaust flowpath,the forward and aft pitch change actuators being hydraulic rotary actuators and mounted radially inwardly of the flowpath in a one to one ratio with the forward and aft rotatable struts of the forward and aft rotatable frames respectively, andforward and aft rotatable shafts extending through the forward and aft rotatable struts and connecting the forward and aft pitch change actuators to the forward and aft propellers respectively in a one to one ratio. 14. An engine as claimed in claim 13, further comprising the forward and aft rotary unions operable for transferring hydraulic fluid radially inwardly and outwardly with respect to the centerline axis between the forward and aft union stators and the forward and aft union rotors respectively. 15. An engine as claimed in claim 14, further comprising forward and aft drive shafts counter-rotatably connected to the power turbine and drivingly connected to the forward and aft rotatable frames respectively and the aft union rotor including an annular rotor body integral with integral with the forward drive shaft. 16. An engine as claimed in claim 13, further comprising: a power turbine rotor of the power turbine rotatably mounted on and between axially spaced apart forward and aft structural turbine frames of the engine,the power turbine rotor drivingly connected to an epicyclic gearbox, andthe epicyclic gearbox drivingly connected by forward and aft drive shafts to the forward and aft rotatable frames for counter-rotatably driving the forward and aft rotatable frames and the forward and aft propellers mounted thereon. 17. An engine as claimed in claim 16, further comprising: the forward union stator mounted on the forward structural turbine frame and the forward union stator connected to the hydraulic fluid supply by hydraulic fluid forward supply and return lines,the aft union stator mounted on the aft structural turbine frame and the aft union stator connected to the hydraulic fluid supply by hydraulic fluid aft supply and return lines,the forward hydraulic rotary union operable for transferring pressurized hydraulic fluid between the hydraulic fluid forward supply and return lines and aft supply and return rotatable lines respectively,the aft hydraulic rotary union operable for transferring the pressurized hydraulic fluid between the hydraulic fluid aft supply and return lines and forward supply and return rotatable lines respectively,the forward union rotor connected to the aft supply and return rotatable lines mounted in the aft rotatable frame and connected to the aft pitch change actuators, andthe aft union rotor connected to the forward supply and return rotatable lines mounted in the forward rotatable frame and connected to the forward pitch change actuators. 18. An engine as claimed in claim 17, further comprising: the forward union rotor extending aftwardly through the aft union rotor,the aft union rotor including an annular rotor body integral with the forward drive shaft,the forward and aft union rotors respectively carrying at least in part fluid passageways,the fluid passageways carried by the forward union rotor in fluid communication with the hydraulic fluid forward supply and return lines and the aft supply and return rotatable lines respectively, andthe fluid passageways carried by the annular rotor body within the aft union rotor in fluid communication with the hydraulic fluid aft supply and return lines and the forward supply and return rotatable lines respectively. 19. An engine as claimed in claim 18, further comprising: each of the forward and aft union stators including at least first and second fluid chambers having at least first and second stator channels respectively extending radially outwardly from and open through an annular radially inner stator surface of the forward and aft union stators,each of the fluid chambers having at least one inlet port connected to the hydraulic fluid supply, andthe fluid passageways in fluid communication with the fluid chambers. 20. An engine as claimed in claim 19, further comprising: the aft union rotor including an annular rotor stator race mounted on the annular rotor body,a radially outer rotor surface of the annular rotor stator race in slidably sealing engagement with the inner stator surface,transfer holes in fluid communication with the fluid chambers and radially extending entirely through the annular rotor stator race and the annular rotor body to an annular rotary manifold mounted to the annular rotor body, andthe transfer holes in fluid communication with the fluid passageways extending axially aftwardly through the rotary manifold. 21. An engine as claimed in claim 20, further comprising the fluid passageways including intermediate tubes in part connecting portions of the fluid passageways in the rotary manifold to radial sections of the fluid passageways. 22. An engine as claimed in claim 12, further comprising: the forward and aft rotary unions integrated in a single nested rotary union,the forward and aft union stators integrated in a common single stator, andthe nested rotary union operable for transferring hydraulic fluid radially inwardly and outwardly between the common single stator and the forward and aft union rotors. 23. An engine as claimed in claim 22, further comprising: a flowpath which passes through the forward and aft rotatable frames,forward and aft rotatable struts of the forward and aft rotatable frames respectively extending radially across the exhaust flowpath,the forward and aft pitch change actuators being hydraulic rotary actuators and mounted radially inwardly of the flowpath in a one to one ratio with the forward and aft rotatable struts of the forward and aft rotatable frames respectively, andforward and aft rotatable shafts extending through the forward and aft rotatable struts and connecting the forward and aft pitch change actuators to the forward and aft propellers respectively in a one to one ratio. 24. A propulsion apparatus as claimed in claim 1, further comprising the forward and aft rotatable frames counter-rotatably mounted on a structural frame and the counter-rotatable forward and aft rows of forward and aft propellers located forward or aft of the structural frame.
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