US3885609A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cooled rotor blade for a gas turbine
Assignee: Individual
•
Filing: 1973-01-18
•
Granted: 1975-05-27
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Expires: 1993-01-18
Abstract
Abstract The rotor blade body has a first flow path extending parallel to and immediately downstream of the blade front. This path passes through a trough-shaped indentation in the blade tip before terminating in an air exit in the zone of the trailing edge. One or more secondary flow paths also pass through the blade body and terminate in the zone of the trailing edge. These secondary flow paths reverse the flow either by 90* or 180* and are of larger intermediate flow cross-sectional area. Restrictors can be provided in the exits for the secondary paths to obtain high exit velocities.
Inventors
- 👤 Oskar Frei
- 👤 Dilip Mukherjee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:08
CPC Classifications
F; F01; F01D; F01D5/00; F01D5/12; F01D5/14; F01D5/18; F01D5/187; F01D5/20; F05; F05D; F05D2240/00; F05D2240/10; F05D2240/12; F05D2240/126
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
211 words
A cooled rotor blade for a gas turbine comprising a one-piece rotor blade body having a blade front, a trailing edge and a blade tip at one radial end extending from said blade front to said trailing edge, said blade tip having a trough-shaped indentation extending longitudinally therein; means defining a first flow path through said blade body extending immediately downstream of and parallel to said blade front and terminating in said trough-shaped indentation; a first coolant exit in said blade body in the zone of said trailing edge, said exit being in communication with said trough-shaped indentation on the suction side of said body for the passage of coolant therethrough; and means defining a second flow path and a third path through said blade body, each of said second and third flow paths having a portion parallel to said first flow path and including portions for deflecting respective flows of coolant 90* therein; a second coolant exit in communication with said second flow path and a third coolant exit in communication with said third flow path, each of said second and third coolant exits being disposed over a part of the height of said blade body in the zone of said trailing edge on the pressure side of said body.
Claim 2
Dependent Claim
211 words
A cooled rotor blade for a gas turbine comprising a one-piece rotor blade body having a blade front, a trailing edge and a blade tip at one radial end extending from said blade front to said trailing edge, said blade tip having a trough-shaped indentation extending longitudinally therein; means defining a first flow path through said blade body extending immediately downstream of and parallel to said blade front and terminating in said trough-shaped indentation; a first coolant exit in said blade body in the zone of said trailing edge, said exit being in communication with said trough-shaped indentation on the suction side of said body for the passage of coolant therethrough; and means defining a second flow path and a third path through said blade body, each of said second and third flow paths having a portion parallel to said first flow path and including portions for deflecting respective flows of coolant 90* therein; a second coolant exit in communication with said second flow path and a third coolant exit in communication with said third flow path, each of said second and third coolant exits being disposed over a part of the height of said blade body in the zone of said trailing edge on the pressure side of said body.
Claim 3
Dependent Claim
46 words
A cooled rotor blade as set forth in claim 1 wherein each of said second and third flow paths have boundary walls defining portions of said respective flow paths and wherein fins are disposed on said walls projecting into said respective second and third flow paths.
Claim 4
Dependent Claim
29 words
A cooled rotor blade as set forth in claim 1 which further comprises means in each of said second and third exits for throttling the flow of coolant therefrom.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-26 | 1978-11-25 | 1979-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-26 | 1982-11-25 | 1983-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-26 | 1986-11-25 | 1987-05-27 | $7700.00 | Window Closed / Lapsed |