[특허]Air filtration system for gas turbine engine pneumatic system

[미국특허] Air filtration system for gas turbine engine pneumatic system 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F02C-009/00 F02C-006/04
출원번호	US-0492214 (2009-06-26)
등록번호	US-8572985 (2013-11-05)
발명자 / 주소	Waddleton, David
출원인 / 주소	Pratt & Whitney Canada Corp.
대리인 / 주소	Norton Rose Fulbright Canada LLP
인용정보	피인용 횟수 : 2 인용 특허 : 25

초록 ▼

A gas turbine engine pneumatic system for controlling an air bleed valve includes a variable orifice device for controllably discharging air from the pneumatic system in order to reduce a maximum air pressure applied to the air bleed valve, to a predetermined level. A filter device is provided to fi

대표청구항 ▼

1. A gas turbine engine pneumatic system for controlling an air bleed valve, comprising: an apparatus for generating a maximum air pressure;a first passage extending between the apparatus and the air bleed valve for applying the maximum air pressure to the air bleed valve to close the air bleed valve against a pressurized air;a second passage connected to the first passage and a variable orifice device included in the second passage to controllably discharge air from the first passage through the variable orifice device, thereby reducing the maximum air pressure applied to the air bleed valve to a predetermined level; anda wash filter located in the pneumatic system for filtering the air discharged through the variable orifice device, wherein the wash filter comprises an inlet and first and second outlets, the inlet and first outlet being connected to a main passage of the apparatus to allow an air flow to be introduced into the inlet, a first portion of the air flow passing through the wash filter without filtration and being discharged through the first outlet, and the second outlet being connected to the first passage to allow a second portion of the air flow introduced into the inlet to be filtered and to enter the first passage. 2. The gas turbine engine pneumatic system as defined in claim 1 wherein the wash filter comprises a cylinder defining a central passage between the inlet and the first outlet, surrounded by a filtering medium, the second outlet being in fluid communication with the central passage through the surrounding filtering medium. 3. The gas turbine engine pneumatic system as defined in claim 1 wherein the apparatus comprises an orifice network having an upstream end in fluid communication with a high pressure air source and a downstream end in fluid communication with a low pressure sink. 4. The gas turbine engine pneumatic system as defined in claim 2 wherein the low pressure sink is an ambient air pressure. 5. A gas turbine engine comprising: an air bleed valve for selectively bleeding air from a contained pressurized air; anda pneumatic system for applying a maximum air pressure to the air bleed valve to close the air bleed valve against a pressure of the pressurized air;wherein the pneumatic system comprises a variable orifice device for controllably discharging air from the pneumatic system through the variable orifice device, thereby reducing the maximum air pressure applied to the air bleed valve to a predetermined level; andwherein the pneumatic system comprises a wash filter for filtering the air discharged through the variable orifice device, the wash filter filtering a first portion of an entire air flow entering the wash filter and directing a second portion of the entire air flow to pass through the wash filter without filtration, thereby forming a washing air flow for cleaning the wash filter. 6. The gas turbine engine as defined in claim 5 wherein the wash filter is included in a main passage of the pneumatic system to thereby allow a dropping orifice network air flow to pass the wash filter as the washing air flow, and wherein a first passage extends between the wash filter and the air bleed valve, and a second passage including the variable orifice device is connected to the first passage, thereby directing the filtered first portion of the air flow to pass through the first and second passages.

이 특허에 인용된 특허 (25) 인용/피인용 타임라인 분석

Griffiths,Michael; Green,Paul Bernard; Bickley,Daniel James, Engine fuel control.
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Smith Trevor Stanley,GB2, Flow sensor and fuel control system.
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Smith Trevor S. (West Midlands GB2), Fuel control system.
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Arline Samuel B. (Lake Park FL) Eder Matthias (Stuart FL) Dunlap Jeffrey J. (Stuart FL) Douglas Gary W. (Palm Beach Gardens FL), Fuel metering and actuation system.
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Bradley Jerome R. (Sterling Heights MI) Halvorsen Robert M. (Birmingham MI) Long Gregory F. (Canton MI), Fuel nozzle assembly with integral valve assembly and inlet wash filter and primary fuel take-off.
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Donnelly Brian G. (Suffield CT) Dyer Gerald P. (Enfield CT) Wiesner Charles E. (Glastonbury CT), Fuel splitter valve assembly for gas turbine.
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Griffiths, Michael; Smith, Trevor Stanley; Dixon, Glyn, Fuel system.
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Kazunori Yamanaka JP; Satoshi Kondou JP; Masami Noda JP, Gas turbine.
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Yamanaka,Kazunori; Marushima,Shinya, Gas turbine and gas turbine high temperature section cooling method.
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Yamanaka, Kazunori; Noda, Masami; Marushima, Shinya; Kondo, Satoshi, Gas turbine equipment and gas turbine cooling method.
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Yamanaka, Kazunori; Kondou, Satoshi; Noda, Masami, Gas turbine having a cooling air system and a spray air system.
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Blais Daniel (Mont St. Hilaire CAX) Tremaine Eric (Longueuil CAX) Ozarapoglu Vasil (St. Lambert CAX), Handling bleed valve.
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Reuter Charles E. ; Gaudet Timothy J., Hydromechanical control for a variable delivery, positive displacement fuel pump.
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Sun Cedric (Great Neck NY) Roach Charles J. (Brooklyn NY), Inlet air cleaner assembly for turbine engines.
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Berkeley, Dalero Winston; McLeod, Robert A.; Black, Michael Paul; Dean, Doug, Pilot air apparatus and method for a combustor of gas turbine.
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Braesch Robert O. (Laurens IA) Hong Peter L. (Laurens IA) Mefferd Thomas A. (Murrells Inlet SC) Olson Michael D. (Laurens IA), Pneumatic control circuit for applying constant force.
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Hoffmann,J？rgen; Rofka,Stefan; W？lchli,Ren？, Process for controlling the cooling air mass flow of a gas turbine set.
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McCombs ; Jr. Howard L. (South Bend IN), Starting system for a turbine engine.
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Berkeley, Dalero Winston; McLeod, Robert A.; Black, Michael Paul; Dean, Doug, System and method for regulating pressure of pilot air to combustor of gas turbine.
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Coffinberry George A. ; Leonard Gary L., System and method of providing clean filtered cooling air to a hot portion of a gas turbine engine.
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Eick,Chris D.; Futa, Jr.,Paul W., System and method to reduce fuel system pumping heat input.
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Roundy, James S.; Ball, Larry K.; Kincheloe, Todd A., Systems for filtering particles from an airflow.
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Little David Allen, Turbine inter-disk cavity cooling air compressor.
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Hooker,Kenneth; Mutch,James; Franconi,Robert; Goodman,Bob, Two stage solenoid control valve.
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McLevige Daniel J., Variable displacement pump fuel metering system and electrohydraulic servo-valve for controlling the same.
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이 특허를 인용한 특허 (2) 인용/피인용 타임라인 분석

Hielkema, Jerry Dean; Hallisey, Kevin, Differential pressure regulating shut-off valve.
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Goodman, Robert; Zheng, Zhijun; Greenberg, Michael D., Inline pressure regulating valve assembly with inlet pressure bias.
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A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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[미국특허] Air filtration system for gas turbine engine pneumatic system 원문보기

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[미국특허] Air filtration system for gas turbine engine pneumatic system 원문보기

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이 특허에 인용된 특허 (25) 인용/피인용 타임라인 분석

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