Gas turbine engine with a plurality of bleed valves
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
G01N-029/00
F02B-077/00
출원번호
UP-0499809
(2006-08-07)
등록번호
US-7591183
(2009-10-20)
우선권정보
GB-0518659.8(2005-09-13)
발명자
/ 주소
King, Dennis M
출원인 / 주소
Rolls Royce PLC
대리인 / 주소
Oliff & Berridge, PLC
인용정보
피인용 횟수 :
4인용 특허 :
14
초록▼
A health monitoring apparatus for a mechanical system includes: a microphone arranged to receive sound from the system; and a processor adapted to process the output of the microphone. The mechanical system may be a gas turbine engine. Further, the engine may have a plurality of bleed valves, each o
A health monitoring apparatus for a mechanical system includes: a microphone arranged to receive sound from the system; and a processor adapted to process the output of the microphone. The mechanical system may be a gas turbine engine. Further, the engine may have a plurality of bleed valves, each of the bleed valves being configured such that, when open, it produces a sound which is distinguishable from the sounds produced by the other bleed valves, and the microphone being arranged to detect the sound from the bleed valves.
대표청구항▼
What is claimed is: 1. A gas turbine engine comprising a plurality of bleed valves, each of said bleed valves being configured such that, when open, that bleed valve produces a sound which is distinguishable from the sounds produced by other bleed valves. 2. An engine according to claim 1 wherein
What is claimed is: 1. A gas turbine engine comprising a plurality of bleed valves, each of said bleed valves being configured such that, when open, that bleed valve produces a sound which is distinguishable from the sounds produced by other bleed valves. 2. An engine according to claim 1 wherein each bleed value is configured such that the sound produced by each bleed valve is, for a given pressure differential across the valve, a tone of substantially uniform pitch. 3. An engine according to claim 1 further comprising a noise generator associated with each bleed valve and located in an air flow through or out of each bleed valve, which generates the sound. 4. An engine according to claim 1 further comprising a health monitoring apparatus for monitoring the health of the engine, the apparatus including: a microphone arranged to receive sound from the bleed valves; and a processor adapted to process an output of the microphone. 5. A method for monitoring the operation of one or more bleed valves in a gas turbine engine, wherein the engine has a plurality of bleed valves, each of said bleed valves being configured such that, when open, the bleed valve produces a sound which is distinguishable from the sounds produced by the other bleed valves, wherein the sound detected by a microphone includes the sound produced by said bleed valves, the method including the steps of: monitoring an output of the microphone arranged to receive the sounds produced by said bleed valves; and processing the output of the microphone. 6. A method according to claim 5 wherein the sound produced by each bleed valve is generated by a noise generator associated with each bleed valve and located in an air flow through or out of said bleed valve. 7. An engine according to claim 4 wherein the processor is adapted to filter random noise from the output of the microphone. 8. An engine according to claim 4 wherein the processor is adapted to analyze the output of the microphone. 9. An engine according to claim 4 wherein the processor is adapted to compare the output of the microphone with a model of a normal behavior of the engine. 10. An engine according to claim 9 wherein the processor is further adapted to produce an alarm or an alert if the output of the microphone deviates from the model by more than a pre-defined limit. 11. An engine according to claim 4 wherein the microphone is located in an under-cowl location. 12. A method according to claim 5 wherein said step of processing includes one or more of the following: removal of random noise, filtering, calculation of power spectra, zmod data, spectrum analysis, tracked order extraction, amplitude and phase extraction. 13. A method according to claim 5 including the further step of analyzing the output of the microphone. 14. A method according to claim 13 wherein the step of analyzing the output of the microphone includes the step of comparing the output with a model of a normal behavior of the system. 15. A method according to claim 14 including the further step of generating an alarm or an alert if the output deviates from the model by more than a pre-defined limit. 16. A method according to claim 5 further including the step of providing the microphone in an under-cowl location. 17. A method according to claim 5 wherein the bleed valves are configured such that the sound produced by each bleed valve is, for a given pressure differential across the valve, a tone of substantially uniform pitch.
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이 특허에 인용된 특허 (14)
Acton Elizabeth (Cambridge GB2) Cargill Alexander M. (Derby GB2) Ross Colin F. (Cambridge GB2) Eatwell Graham P. (Cambridge GB2), Active control of unsteady motion phenomena in turbomachinery.
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