US3767322A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Internal cooling for turbine vanes
Assignee: Westinghouse Electric Corp
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Filing: 1971-07-30
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Granted: 1973-10-23
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Expires: 1991-07-30
Abstract
Abstract A structure for internally cooling an airfoil vane in an axial flow gas turbine. The vane defines a cavity which approximates the shape of the outer airfoil. A frame of similar shape is inserted into the cavity in spaced relation therefrom. The cavity walls and the frame cooperatively define a cooling passageway. A row of oblong apertures is disposed along the leading edge of the frame and a second row of apertures is disposed along the convex side of the frame, the second row of apertures being inclined relative to the cavity wall. Pressurized cooling air enters the frame, is forced through the apertures, impinges against the inner walls of the vane, and flows along the passageway to cool the vane.
Inventors
- 👤 G Durgin
- 👤 P Barnabei
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:05
CPC Classifications
F; F01; F01D; F01D5/00; F01D5/12; F01D5/14; F01D5/18; F01D5/187; F01D5/188; F01D5/189; F01D9/00; F01D9/02; F01D9/04; F01D9/042
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
218 words
A vane structure for an elastic fluid axial flow machine, said vane structure being generally of airfoil shape with leading and trailing edges and having a convex side and a concave side connecting said edges, said vane structure having an internal cavity defined by the internal surfaces of said sides, a frame structure having leading and trailing edges connected by a convex side and a concave side, said frame conforming generally to the configuration of said cavity and being disposed in the cavity in spaced relation with the internal surfaces thereof to define coolant fluid passages extending from the leading edge to the trailing edge of the vane between the corresponding sides of the vane and of the frame, said frame being open at one end to receive coolant fluid and being closed at the other end, a first row of apertures in the leading edge of the frame, the convex side of the frame having at least one indented portion forming an elongated surface extending from one end to the other of the frame and being inclined at an acute angle with respect to the adjacent internal surface of the vane, a second row of apertures in said elongated surface, and discharge passage means in the traIling edge of the vane for escape of the coolant fluid.
Claim 2
Dependent Claim
218 words
A vane structure for an elastic fluid axial flow machine, said vane structure being generally of airfoil shape with leading and trailing edges and having a convex side and a concave side connecting said edges, said vane structure having an internal cavity defined by the internal surfaces of said sides, a frame structure having leading and trailing edges connected by a convex side and a concave side, said frame conforming generally to the configuration of said cavity and being disposed in the cavity in spaced relation with the internal surfaces thereof to define coolant fluid passages extending from the leading edge to the trailing edge of the vane between the corresponding sides of the vane and of the frame, said frame being open at one end to receive coolant fluid and being closed at the other end, a first row of apertures in the leading edge of the frame, the convex side of the frame having at least one indented portion forming an elongated surface extending from one end to the other of the frame and being inclined at an acute angle with respect to the adjacent internal surface of the vane, a second row of apertures in said elongated surface, and discharge passage means in the traIling edge of the vane for escape of the coolant fluid.
Claim 3
Dependent Claim
32 words
The structure of claim 1 and including means on the sides of the frame to direct the flow of coolant fluid from the leading edge to the trailing edge of the vane.
Claim 4
Dependent Claim
45 words
The structure of claim 1 in which the frame structure has a sealing portion engaging one side of the vane adjacent the trailing edge, the sealing portion having a row of apertures therein adapted to equalize the fluid pressures on opposite sides of the vane.
Claim 5
Dependent Claim
32 words
The structure of claim 3 and including means on the sides of the frame to direct the flow of coolant fluid from the leading edge to the trailing edge of the vane.
References Cited (Backward Citations)
US2873944A
Cited
US3032314A
Cited
US3388888A
Cited
US3475107A
Cited
GB1222565A
Cited
US3623318A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-22 | 1977-04-23 | 1977-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-22 | 1981-04-23 | 1981-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-22 | 1985-04-23 | 1985-10-23 | $7700.00 | Window Closed / Lapsed |