US3635587A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blade cooling liner
Assignee: Motors Liquidation Co
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Filing: 1970-06-02
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Granted: 1972-01-18
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Expires: 1990-06-02
Abstract
Abstract A sheet metal liner for an internally air-cooled turbine blade is of generally airfoil shape and is spaced from the interior of the hollow blade by bosses extending from the blade wall. The liner is closed at its edge toward the trailing edge of the blade and is partially closed at its forward edge. At the forward edge, a row of nozzles to jet cooling air against the interior of the leading edge of the blade is defined by two strips of sheet metal bonded together having grooves etched into their abutting faces, which grooves are registered to define nozzles of converging configuration.
Inventors
- 👤 Richard C Giesman
- 👤 Ronald P Schwedland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:36
CPC Classifications
F; F01; F01D; F01D5/00; F01D5/12; F01D5/14; F01D5/18; F01D5/187; F01D5/188; F01D5/189; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49316; Y10T29/49336; Y10T29/49339; Y10T29/49341
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
118 words
A blade liner for insertion into a hollow airfoil for circulating cooling fluid within the airfoil comprising two sheet metal walls joined together at the edges to provide a tubular structure conforming generally to the interior cavity of the airfoil, the liner also comprising two sheet metal strips disposed between the walls at the leading edge of the liner, the walls and strips being bonded together into a laminated structure, each strip having a row of grooves each extending across the inner face of the strip, with each groove aligned with a groove in the abutting strip, each aligned pair of grooves being configured to define a nozzle for discharging a jet of cooling fluid from the liner.
Claim 2
Dependent Claim
118 words
A blade liner for insertion into a hollow airfoil for circulating cooling fluid within the airfoil comprising two sheet metal walls joined together at the edges to provide a tubular structure conforming generally to the interior cavity of the airfoil, the liner also comprising two sheet metal strips disposed between the walls at the leading edge of the liner, the walls and strips being bonded together into a laminated structure, each strip having a row of grooves each extending across the inner face of the strip, with each groove aligned with a groove in the abutting strip, each aligned pair of grooves being configured to define a nozzle for discharging a jet of cooling fluid from the liner.
Claim 3
Dependent Claim
126 words
A blade liner for insertion into a hollow airfoil for circulating cooling fluid within the airfoil comprising two sheet metal walls joined together at the edges to provide a tubular structure conforming generally to the interior cavity of the airfoil, the liner also comprising two sheet metal strips disposed between the walls at the leading edge of the liner, the walls and strips being bonded together into a laminated structure, each strip having a row of grooves each extending across the inner face of the strip and each converging toward the leading edge, with each groove aligned with a groove in the abutting strip, each aligned pair of grooves being configured to define a converging nozzle for discharging a jet of cooling fluid from the liner.
Claim 4
Dependent Claim
126 words
A blade liner for insertion into a hollow airfoil for circulating cooling fluid within the airfoil comprising two sheet metal walls joined together at the edges to provide a tubular structure conforming generally to the interior cavity of the airfoil, the liner also comprising two sheet metal strips disposed between the walls at the leading edge of the liner, the walls and strips being bonded together into a laminated structure, each strip having a row of grooves each extending across the inner face of the strip and each converging toward the leading edge, with each groove aligned with a groove in the abutting strip, each aligned pair of grooves being configured to define a converging nozzle for discharging a jet of cooling fluid from the liner.
Claim 5
Dependent Claim
22 words
A liner as recited in claim 2 in which each nozzle has a length at least as great as its minimum diameter.
Claim 6
Dependent Claim
22 words
A liner as recited in claim 3 in which the length of each nozzle is at least several times its minimum diameter.
Claim 7
Dependent Claim
209 words
A cooled flow-directing member for a high-temperature turbomachine comprising, in combination, a hollow airfoil with leading and trailing edges and two faces extending from the leading edge to the trailing edge, a hollow liner mounted within and extending spanwise of the airfoil, means for conducting a cooling fluid into the liner, means spacing the liner from the interior of the airfoil to define cooling fluid passages extending between each face and the liner from near the leading edge to near the trailing edge, and means defining a cooling fluid outlet at the trailing edge of the airfoil; the liner comprising two sheet metal walls disposed generally parallel to the blade faces and joined at the leading and trailing edges to provide a tubular generally airfoil-shaped structure and including two strips abutted between the walls at the leading edge of the liner, the walls and strips being bonded together into a laminated structure, each strip having a row of grooves each extending across the inner face of the strip, with each groove aligned with a groove in the abutting strip, each aligned pair of grooves being configured to define a nozzle for discharging a jet of cooling fluid from the liner against the inner surface of the airfoil leading edge.
Claim 8
Dependent Claim
209 words
A cooled flow-directing member for a high-temperature turbomachine comprising, in combination, a hollow airfoil with leading and trailing edges and two faces extending from the leading edge to the trailing edge, a hollow liner mounted within and extending spanwise of the airfoil, means for conducting a cooling fluid into the liner, means spacing the liner from the interior of the airfoil to define cooling fluid passages extending between each face and the liner from near the leading edge to near the trailing edge, and means defining a cooling fluid outlet at the trailing edge of the airfoil; the liner comprising two sheet metal walls disposed generally parallel to the blade faces and joined at the leading and trailing edges to provide a tubular generally airfoil-shaped structure and including two strips abutted between the walls at the leading edge of the liner, the walls and strips being bonded together into a laminated structure, each strip having a row of grooves each extending across the inner face of the strip, with each groove aligned with a groove in the abutting strip, each aligned pair of grooves being configured to define a nozzle for discharging a jet of cooling fluid from the liner against the inner surface of the airfoil leading edge.
Claim 9
Dependent Claim
18 words
A combination as recited in claim 5 in which the grooves and nozzles converge toward the leading edge.
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) | 1975-01-17 | 1975-07-19 | 1976-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-17 | 1979-07-19 | 1980-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-17 | 1983-07-19 | 1984-01-18 | $7700.00 | Window Closed / Lapsed |