Axial compressor with arrangement for bleeding air from variable stator vane stages
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F01D-017/16
출원번호
US-0094934
(2011-04-27)
등록번호
US-8734091
(2014-05-27)
발명자
/ 주소
Moniz, Thomas Ory
Viars, Thomas
출원인 / 주소
General Electric Company
대리인 / 주소
Andes, William Scott
인용정보
피인용 횟수 :
0인용 특허 :
14
초록▼
A compressor includes: a compressor spool rotatable about an axis carrying axially-spaced-apart blade rows of compressor blades; a casing surrounding the compressor blades, the casing carrying a liner assembly defining a boundary of a primary compressor flowpath; and a plurality of axially-spaced-ap
A compressor includes: a compressor spool rotatable about an axis carrying axially-spaced-apart blade rows of compressor blades; a casing surrounding the compressor blades, the casing carrying a liner assembly defining a boundary of a primary compressor flowpath; and a plurality of axially-spaced-apart stator rows of stator vanes carried by the liner assembly, the stator rows alternating axially with the blade rows. At least some of the stator rows are variable stator rows, the stator vanes of which are mounted on trunnions passing through the casing, and are pivotable relative to the casing. An actuator arm is coupled to each trunnions, outside the casing. At least one first bleed slot passes through the liner structure between axially adjacent first and second ones of the variable stator rows; and a first flow path defined by the casing communicates with the first bleed slot and with the exterior of the casing.
대표청구항▼
1. A compressor apparatus, comprising: a compressor spool mounted for rotation about a centerline axis and carrying a plurality of axially-spaced-apart blade rows, each blade row comprising an annular array of airfoil-shaped compressor blades;a casing surrounding the compressor blades, the casing ca
1. A compressor apparatus, comprising: a compressor spool mounted for rotation about a centerline axis and carrying a plurality of axially-spaced-apart blade rows, each blade row comprising an annular array of airfoil-shaped compressor blades;a casing surrounding the compressor blades, the casing carrying a liner assembly which defines a boundary of a primary gas flowpath through the compressor;a plurality of axially-spaced-apart stator rows carried by the liner assembly, each stator row comprising an annular array of airfoil-shaped stator vanes, wherein the stator rows alternate axially with the blade rows, wherein at least some axially adjacent ones of the stator rows are variable stator rows, the stator vanes of which are mounted on trunnions passing through the casing, so as to be pivotable relative to the casing;an actuator arm coupled to each of the trunnions, outside the casing, wherein the actuator arms of a first one of the variable stator rows extend axially forward and the actuator arms of an axially adjacent second one of the second variable stator rows extend axially rearward, so as to create an open void at the exterior of the casing, which is in general axial alignment with at least one first bleed slotthat passes through the liner assembly between first and second ones of the variable stator rows;a first flow path defined by the casing, communicating with the at least one first bleed slot and with an exterior of the casing; andwherein the casing includes at least one first extraction port formed at an exterior surface of the casing in flow communication with the first flow path and positioned within forward and aft boundaries of the open void in the axial direction. 2. The apparatus of claim 1 wherein the liner assembly is spaced-apart from the remainder of the casing in a radial direction so as to define an open first plenum therebetween, the first plenum defining the boundaries of the first flow path. 3. The apparatus of claim 2 wherein the liner carries an annular shroud surrounding one of the blade rows, and the at least one first bleed slot passes through the shroud. 4. The apparatus of claim 2 further comprising an annular duct with spaced-apart forward and aft walls disposed in the first plenum. 5. The apparatus of claim 1 further including: at least one additional bleed slot passing through the liner structure axially downstream of all of the variable stator rows; anda second flow path defined by the casing communicating with the at least one additional bleed slot and with at least one additional extraction port which is disposed at an exterior surface of the casing, the second flow path being isolated from the first flow path. 6. A compressor apparatus, comprising: a compressor spool mounted for rotation about a centerline axis and carrying a plurality of axially-spaced-apart blade rows, each blade row comprising an annular array of airfoil-shaped compressor blades;a casing surrounding the compressor blades, the casing carrying a liner assembly which defines a boundary of a primary gas flowpath through the compressor;a plurality of axially-spaced-apart stator rows carried by the liner assembly, each stator row comprising an annular array of airfoil-shaped stator vanes, wherein the stator rows alternate axially with the blade rows, wherein at least some axially adjacent ones of the stator rows are variable stator rows, the stator vanes of which are mounted on trunnions passing through the casing, so as to be pivotable relative to the casing;an actuator arm coupled to each of the trunnions, outside the casing;at least one first bleed slot passing through the liner assembly between axially adjacent first and second ones of the variable stator rows;wherein the liner assembly is spaced-apart from the remainder of the casing in a radial direction so as to define an open first plenum therebetween, the first plenum defining the boundaries of a first flow path communicating with the at least one first bleed slot and with the exterior of the casing, wherein:the trunnions are mounted in annular bosses extending in a generally radial direction between the liner structure and the remainder of the casing;the at least one first bleed slot is positioned axially forward of a selected one of the bosses, the selected one of the bosses being in the second one of the variable stator rows;the selected one of the bosses has at least one aperture formed therein, such that some of the trunnions extend radially across the at least one aperture;the first flow path passes through the at least one aperture in the selected one of the bosses and extends axially aft of the selected one of the bosses; andthe casing includes at least one first extraction port formed at the exterior of the casing in flow communication with the first flow path and positioned immediately axially aft of the selected one of the bosses. 7. The apparatus of claim 6 further comprising: a forward duct with spaced-apart inner and outer walls disposed between the first bleed slot and a forward face of the selected boss; anda rear duct with spaced-apart inner and outer walls disposed between an aft face of the selected boss and an interior surface of the casing. 8. The apparatus of claim 6 wherein at least the trunnions which extend across the at least one aperture have a noncircular cross-sectional shape which is narrower in a circumferential direction than in an axial direction. 9. The apparatus of claim 6 wherein a sleeve surrounds each of the trunnions that extends across the at least one aperture.
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이 특허에 인용된 특허 (14)
Brault, Michel Gilbert Roland; Obrecht, Thierry Jean-Jacques, Air reinjection compressor.
Proctor, Robert; Montgomery, Julius John; Epstein, Michael Jay; Barbe, Roger Owen; Sam, Hai Buu; Ogzewalla, James Bernar; Kemp, Andrew David; Doloresco, Bryan Keith, Gas turbine engine bleed scoops.
McGreehan William F. (West Chester OH) Fintel Bradley W. (Fairfield OH) Lammas Andrew J. (Maineville OH), High pressure compressor flowpath bleed valve extraction slot.
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