US4155680A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compressor protection means
Assignee: General Electric Co
•
Filing: 1977-02-14
•
Granted: 1979-05-22
•
Expires: 1997-02-14
Abstract
Abstract In a gas turbine engine including a compressor having a casing with a passage adapted to pass bleed air to a circumferentially extending bleed manifold surrounding the casing, the passage including a surface exposed to incendiary particles periodically entrained in the bleed air, an improvement is provided comprising means for preventing impingement of the particles upon the exposed surface. In one form the means is disposed between the exposed surface and the bleed air and is comprised of a material which, when reacted with the particles, produces a compound which is essentially nonpyrophoric in the environment of the passage.
Inventors
- 👤 Peter J. Linko, III
- 👤 Michael A. Radomski
- 👤 William E. Schoenborn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 00:07
CPC Classifications
F; F02; F02C; F02C6/00; F02C6/04; F02C6/06; F02C6/08; F02C7/00; F02C7/24; F02C7/25; F04; F04D; F04D29/00; F04D29/40; F04D29/52; F04D29/54; F04D29/541; F04D29/542; Y; Y10; Y10S; Y10S60/00; Y10S60/909; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12771; Y10T428/12861; Y10T428/12944
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
125 words
In a gas turbine engine including a compressor having a casing with a mounting slot adapted to receive a mounting tang of a stationary airfoil, a plurality of bleed apertures extending through said casing and communicating said slot with a bleed manifold extending about said casing radially outwardly thereof, each of said apertures having an aperture surface area, said slot having a first surface in engagement with said tang and a second surface spaced from said tang, the improvement comprising: first means for preventing incendiary particles entrained in a gas stream flowing through said slot from impinging upon said second surface, wherein said first means is comprised of coating means bonded to said second surface to isolate said second surface from impingement by said particles.
Claim 2
Dependent Claim
125 words
In a gas turbine engine including a compressor having a casing with a mounting slot adapted to receive a mounting tang of a stationary airfoil, a plurality of bleed apertures extending through said casing and communicating said slot with a bleed manifold extending about said casing radially outwardly thereof, each of said apertures having an aperture surface area, said slot having a first surface in engagement with said tang and a second surface spaced from said tang, the improvement comprising: first means for preventing incendiary particles entrained in a gas stream flowing through said slot from impinging upon said second surface, wherein said first means is comprised of coating means bonded to said second surface to isolate said second surface from impingement by said particles.
Claim 3
Dependent Claim
23 words
The invention as set forth in claim 1 further comprising shielding means for isolating said aperture surface area from impingement by said particles.
Claim 4
Dependent Claim
33 words
The invention as set forth in claim 1 wherein said coating means is comprised of a material which when reacted with said particles produces a compound which is essentially non-pyrophoric in said slot.
Claim 5
Dependent Claim
24 words
The invention as set forth in claim 1 wherein said coating means is comprised of a first layer of material comprised substantially of nickel.
Claim 6
Dependent Claim
51 words
The invention as set forth in claim 4 wherein said coating means is further comprised of a second layer of material applied to and over said first layer and having the characteristic of reacting with said particles to form a compound which is essentially non-pyrophoric in the environment of said slot.
Claim 7
Dependent Claim
28 words
The invention as set forth in claim 4 wherein said coating means is further comprised of a second layer of aluminum applied to and over said first layer.
Claim 8
Dependent Claim
115 words
In a gas turbine engine including a compressor having a casing with a mounting slot adapted to receive a mounting tang of a stationary airfoil, a plurality of bleed apertures extending through said casing and communicating said slot with a bleed manifold extending about said casing radially outwardly thereof, each of said apertures having an aperture surface area, said slot having a first surface in engagement with said tang and a second surface spaced from said tang, the improvement comprising: first means for preventing incendiary particles entrained in a gas stream flowing through said slot from impinging upon said second surface; and shielding means for isolating said aperture surface area from impingement by said particles.
Claim 9
Dependent Claim
115 words
In a gas turbine engine including a compressor having a casing with a mounting slot adapted to receive a mounting tang of a stationary airfoil, a plurality of bleed apertures extending through said casing and communicating said slot with a bleed manifold extending about said casing radially outwardly thereof, each of said apertures having an aperture surface area, said slot having a first surface in engagement with said tang and a second surface spaced from said tang, the improvement comprising: first means for preventing incendiary particles entrained in a gas stream flowing through said slot from impinging upon said second surface; and shielding means for isolating said aperture surface area from impingement by said particles.
Claim 10
Dependent Claim
31 words
The invention as set forth in claim 7 wherein said shielding means is comprised of grommet means disposed within said aperture for isolating said aperture surface from impingement by said particles.
Claim 11
Dependent Claim
32 words
The invention as set forth in claim 7 wherein shielding means is comprised of coating means covering said aperture surface area for isolating said aperture surface area from impingement by said particles.
Claim 12
Dependent Claim
34 words
The invention as set forth in claim 9 wherein said coating means is comprised of a first layer of material comprised substantially of nickel and a second layer of material comprised substantially of aluminum.
Claim 13
Dependent Claim
106 words
In a gas turbine engine including a compressor having a casing, a plurality of bleed apertures each of said apertures having an aperture surface area extendng through said casing and communicating with a bleed manifold extending about said casing radially outwardly thereof, the improvement comprising: shielding means for preventing particles entrained in a gas stream flowing through at least one of said apertures from impinging upon said aperture surface area, wherein said shielding means is comprised of coating means having a first layer of material substantially comprised of nickel covering said aperture surface area for isolation of said aperture surface area from impingement by said particles.
Claim 14
Dependent Claim
106 words
In a gas turbine engine including a compressor having a casing, a plurality of bleed apertures each of said apertures having an aperture surface area extendng through said casing and communicating with a bleed manifold extending about said casing radially outwardly thereof, the improvement comprising: shielding means for preventing particles entrained in a gas stream flowing through at least one of said apertures from impinging upon said aperture surface area, wherein said shielding means is comprised of coating means having a first layer of material substantially comprised of nickel covering said aperture surface area for isolation of said aperture surface area from impingement by said particles.
Claim 15
Dependent Claim
26 words
The invention as set forth in claim 11 wherein said coating means is further comprised of a second layer of aluminum applied to said first layer.
Claim 16
Dependent Claim
95 words
In a gas turbine engine including a compressor having a casing, a plurality of bleed apertures, each of said apertures having an aperture surface area extending through said casing and communicating with a bleed manifold extending about said casing radially outwardly thereof, the improvement comprising grommet means disposed within said apertures for preventing particles entrained in a gas stream flowing through at least one of said apertures from impinging upon said aperture surface area, and wherein said grommet means is comprised of a material which is essentially nonpyrophoric and adapted to sublime in said aperture.
Claim 17
Dependent Claim
95 words
In a gas turbine engine including a compressor having a casing, a plurality of bleed apertures, each of said apertures having an aperture surface area extending through said casing and communicating with a bleed manifold extending about said casing radially outwardly thereof, the improvement comprising grommet means disposed within said apertures for preventing particles entrained in a gas stream flowing through at least one of said apertures from impinging upon said aperture surface area, and wherein said grommet means is comprised of a material which is essentially nonpyrophoric and adapted to sublime in said aperture.
Claim 18
Dependent Claim
18 words
The invention as set forth in claim 13 wherein said grommet means is comprised of a nickel-rich material.
Claim 19
Dependent Claim
96 words
In a gas turbine engine including a compressor having a casing, a plurality of bleed apertures, each of said apertures having an aperture surface area extending through said casing and communicating with a bleed manifold extending about said casing radially outwardly thereof, the improvement comprising grommet means disposed within said apertures for preventing particles entrained in a gas stream flowing through at least one of said apertures from impinging upon said aperture surface area, and wherein said grommet means is comprised of a material which, when oxidized in said aperture, produces an oxide in gaseous form.
Claim 20
Dependent Claim
96 words
In a gas turbine engine including a compressor having a casing, a plurality of bleed apertures, each of said apertures having an aperture surface area extending through said casing and communicating with a bleed manifold extending about said casing radially outwardly thereof, the improvement comprising grommet means disposed within said apertures for preventing particles entrained in a gas stream flowing through at least one of said apertures from impinging upon said aperture surface area, and wherein said grommet means is comprised of a material which, when oxidized in said aperture, produces an oxide in gaseous form.
Claim 21
Dependent Claim
18 words
The invention as set forth in claim 15 wherein said grommet means is comprised of a molybdenum-rich material.
Claim 22
Dependent Claim
90 words
In a gas turbine engine includng a compressor having a casing with a passage adapted to pass bleed air to a circumferentially extending bleed manifold surrounding said casing, said passage including a surface exposed to incendiary particles periodically entrained in said bleed air, the improvement comprising means disposed between said surface and said bleed air for preventing impingement of said particles upon said exposed surface, said means comprised of a material which when reacted with said particles forms a compound which is essentially nonpyrophoric in the environment of said passage.
Claim 23
Dependent Claim
90 words
In a gas turbine engine includng a compressor having a casing with a passage adapted to pass bleed air to a circumferentially extending bleed manifold surrounding said casing, said passage including a surface exposed to incendiary particles periodically entrained in said bleed air, the improvement comprising means disposed between said surface and said bleed air for preventing impingement of said particles upon said exposed surface, said means comprised of a material which when reacted with said particles forms a compound which is essentially nonpyrophoric in the environment of said passage.
Claim 24
Dependent Claim
83 words
In a gas turbine engine including a compressor having a casing with a passage adapted to pass bleed air to a circumferentially extending bleed manifold surrounding said casing, said passage including a surface exposed to incendiary particles periodically entrained in said bleed air, the improvement comprising means disposed between said surface and said bleed air for preventing impingement of said particles upon said exposed surface, comprised of a material which is essentially nonpyrophoric and adapted to sublime in the environment of said passage.
Claim 25
Dependent Claim
83 words
In a gas turbine engine including a compressor having a casing with a passage adapted to pass bleed air to a circumferentially extending bleed manifold surrounding said casing, said passage including a surface exposed to incendiary particles periodically entrained in said bleed air, the improvement comprising means disposed between said surface and said bleed air for preventing impingement of said particles upon said exposed surface, comprised of a material which is essentially nonpyrophoric and adapted to sublime in the environment of said passage.
Claim 26
Dependent Claim
82 words
In a gas turbine engine including a compressor having a casing with a passage adapted to pass bleed air to a circumferentially extending bleed manifold surrounding said casing, said passage including a surface exposed to incendiary particles entrained in said bleed air, the improvement comprising means disposed between said surface and said bleed air for preventing impingement of said particles upon said exposed surface, said means comprised of a material which, when oxidized in said passage, produces an oxide in gaseous form.
Claim 27
Dependent Claim
82 words
In a gas turbine engine including a compressor having a casing with a passage adapted to pass bleed air to a circumferentially extending bleed manifold surrounding said casing, said passage including a surface exposed to incendiary particles entrained in said bleed air, the improvement comprising means disposed between said surface and said bleed air for preventing impingement of said particles upon said exposed surface, said means comprised of a material which, when oxidized in said passage, produces an oxide in gaseous form.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-05-21 | 1982-11-20 | 1983-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-05-21 | 1986-11-20 | 1987-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-05-21 | 1990-11-20 | 1991-05-22 | $7700.00 | Window Closed / Lapsed |