US3706508A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transpiration cooled turbine blade with metered coolant flow
Assignee: Curtiss Wright Corp
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Filing: 1971-04-16
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Granted: 1972-12-19
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Expires: 1991-04-16
Abstract
Abstract A turbine stator blade having a porous skin covering a strut member with channels for cooling air fed from the root, and a removable metering plate attached to the root and having orifices of various sizes for transmitting air to the blade channels, the metering plate being selected for having appropriate orifices for the cooling requirements of blades in differing temperature and pressure environments.
Inventors
- 👤 Seymour Moskowitz
- 👤 William Lingwood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:04
CPC Classifications
F; F01; F01D; F01D5/00; F01D5/12; F01D5/14; F01D5/18; F01D5/182; F01D5/183; F01D5/30; F01D5/3023; F01D5/303; F01D5/3038; F01D5/147
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
168 words
In a gas turbine engine having circumferential temperature gradients and having a ring of circumferentially disposed stator blades having different cooling requirements at different circumferential locations, the combination comprising a transpiration cooled stator blade having a strut member of generally airfoil configuration having on the surface thereof a plurality of lands, a porous skin sheathing the strut and defining with the lands a plurality of discrete coolant passages, the strut having a root portion integral therewith mountable at any portion of the blade ring, the root having a plurality of apertures therethrough each communicating with an associated blade coolant passage, an interchangeable metering plate detachably attached to the root on the side opposite the strut, the metering plate having a plurality of metering orifices therethrough congruent with the strut apertures for metering a supply of coolant to each blade passage, each plate being selected to pass an amount of coolant to its associated blade in accordance with the coolant requirement of the blade at its respective circumferential location.
Claim 2
Dependent Claim
168 words
In a gas turbine engine having circumferential temperature gradients and having a ring of circumferentially disposed stator blades having different cooling requirements at different circumferential locations, the combination comprising a transpiration cooled stator blade having a strut member of generally airfoil configuration having on the surface thereof a plurality of lands, a porous skin sheathing the strut and defining with the lands a plurality of discrete coolant passages, the strut having a root portion integral therewith mountable at any portion of the blade ring, the root having a plurality of apertures therethrough each communicating with an associated blade coolant passage, an interchangeable metering plate detachably attached to the root on the side opposite the strut, the metering plate having a plurality of metering orifices therethrough congruent with the strut apertures for metering a supply of coolant to each blade passage, each plate being selected to pass an amount of coolant to its associated blade in accordance with the coolant requirement of the blade at its respective circumferential location.
Claim 3
Dependent Claim
34 words
The combination recited in claim 1, wherein the metering orifices of each plate are of various sizes to pass different amounts of coolant in accordance with the coolant requirements of their respective blade passages.
Claim 4
Dependent Claim
58 words
The combination recited in claim 2, wherein the root apertures are generally funnel-shaped with their entrance ends facing the orifices of the metering plate and of larger size than any metering orifice, the other ends of the root apertures opening into their respective blade passages and having approximately the same shape and cross-section as their respective blade passages.
Claim 5
Dependent Claim
33 words
The combination recited in claim 3, wherein the lands on the strut are generally longitudinally disposed and the direction of the flow path is generally from the metering plate toward the blade tip.
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) | 1975-12-19 | 1976-06-19 | 1976-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-19 | 1980-06-19 | 1980-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-19 | 1984-06-19 | 1984-12-19 | $7700.00 | Window Closed / Lapsed |