US3867068A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Turbomachinery blade cooling insert retainers
Assignee: General Electric Co
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Filing: 1973-03-30
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Granted: 1975-02-18
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Expires: 1993-03-30
Abstract
Abstract An improved turbomachinery blade includes impingement inserts adapted to direct a coolant toward surfaces defining an internal cavity within the blade. The inserts are provided with means which mechanically secure the inserts in place within the cavity. The securing means include a bushing having flanges of approximately the same thickness as that of the side walls of the insert, which flanges are secured within openings provided in such side walls near the bottom end of the inserts. A pin is inserted within holes provided in the root portion of the blade and a hole extending through the bushing, which is aligned with the holes in the root portion of the blade, and a collar of braze alloy is positioned around each end of the pin, thereby fluidically sealing each end of the pin and the insert and securing the pin to the blade and the insert in place within the cavity.
Inventors
- 👤 Robert J Corsmeier
- 👤 Charles E Corrigan
- 👤 Ronald E Dennis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:59
CPC Classifications
F; F01; F01D; F01D5/00; F01D5/12; F01D5/14; F01D5/147; F01D5/18; F01D5/187; F01D5/188; F01D5/189; F05; F05D; F05D2260/00; F05D2260/20; F05D2260/201
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
91 words
In a turbomachinery blade of the type including a root portion, a blade platform, a hollow body portion defining an internal cavity, at least one thin-walled, hollow insert adapted to be positioned within said hollow body portion, and means for delivering a coolant to the interior of said insert, the improvement comprising: means for mechanically securing said insert to said hollow body portion, said securing means including a bushing adapted to be secured to said insert, and pin means adapted to be secured to both said bushing and to said blade.
Claim 2
Dependent Claim
91 words
In a turbomachinery blade of the type including a root portion, a blade platform, a hollow body portion defining an internal cavity, at least one thin-walled, hollow insert adapted to be positioned within said hollow body portion, and means for delivering a coolant to the interior of said insert, the improvement comprising: means for mechanically securing said insert to said hollow body portion, said securing means including a bushing adapted to be secured to said insert, and pin means adapted to be secured to both said bushing and to said blade.
Claim 3
Dependent Claim
44 words
The improved blade of claim 1 wherein said insert comprises an impingement insert having an inlet at one end thereof and a multiplicity of relatively small holes therethrough which are directed toward surfaces defining said cavity and are adapted to impinge cooling air thereagainst.
Claim 4
Dependent Claim
46 words
The improved blade of claim 2 wherein said bushing is adapted to be positioned within said inlet, and said bushing includes at least one flange of approximately the same thickness as that of said insert wall, and said wall includes an opening for receiving said flange.
Claim 5
Dependent Claim
57 words
The improved blade of claim 3 wherein said bushing includes a second flange of approximately the same thickness as that of said insert wall, said wall includes a second opening for receiving said second flange and said first and second flanges are adapted to be secured to said insert when said flanges are positioned within said openings.
Claim 6
Dependent Claim
49 words
The improved blade of claim 3 wherein said insert includes a base end which defines said inlet, and said base end is sized so as to provide a slight gap between side walls of said internal cavity and said base end, and said gap is filled with a sealant.
Claim 7
Dependent Claim
34 words
The improved blade of claim 2 wherein said bushing comprises a sleeve adapted to be positioned within said inlet, and said sleeve is adapted to be secured to the inner walls of said insert.
Claim 8
Dependent Claim
104 words
A turbomachinery blade comprising a root portion, an airfoil-shaped, hollow body portion defining an internal cavity therein, a blade platform separating said root portion and said hollow body portion and defining the inner bounds of said airfoil, at least one thin-walled, hollow insert positioned within said hollow body portion, passage means adapted to deliver a coolant to the interior of said insert, and means for mechanically securing said insert in a position within said internal cavity, said securing means including a bushing adapted to be secured to said insert and pin means adapted to be secured to both said bushing and to said blade.
Claim 9
Dependent Claim
104 words
A turbomachinery blade comprising a root portion, an airfoil-shaped, hollow body portion defining an internal cavity therein, a blade platform separating said root portion and said hollow body portion and defining the inner bounds of said airfoil, at least one thin-walled, hollow insert positioned within said hollow body portion, passage means adapted to deliver a coolant to the interior of said insert, and means for mechanically securing said insert in a position within said internal cavity, said securing means including a bushing adapted to be secured to said insert and pin means adapted to be secured to both said bushing and to said blade.
Claim 10
Dependent Claim
45 words
The turbomachinery blade recited in claim 7 wherein said insert comprises an impingement insert having an inlet at one end thereof and a multiplicity of relatively small holes therethrough which are directed toward surfaces defining said cavity and are adapted to impinge cooling air thereagainst.
Claim 11
Dependent Claim
48 words
The turbomachinery blade recited in claim 8 wherein said bushing includes at least one flange of approximately the same thickness as that of said insert wall, said wall includes an opening for receiving said flange, and said blade further includes means for securing said flange in said opening.
Claim 12
Dependent Claim
47 words
The turbomachinery blade recited in claim 9 wherein said bushing includes a second flange of approximately the same thickness as that of said insert wall, said wall includes a second opening for receiving said second flange, and means for securing said second flange in said second opening.
Claim 13
Dependent Claim
27 words
The turbomachinery blade recited in claim 9 wherein said bushing includes an inner spool, and said spool is adapted to extend across said inlet of said insert.
Claim 14
Dependent Claim
16 words
The turbomachinery blade recited in claim 11 wherein said spool includes at least one flat side.
Claim 15
Dependent Claim
48 words
The turbomachinery blade recited in claim 8 further including means for dividing said internal cavity into at least two separate cavities, each of said cavities is provided with one of said impingement inserts, and each of said cavities includes means for mechanically securing said insert to said blade.
Claim 16
Dependent Claim
52 words
The turbomachinery blade recited in claim 9 wherein said root portion of said blade includes at least one hole, said bushing includes at least one hole adapted to align with said hole in said root portion, and said pin means comprise a pin adapted to be positioned within each of said holes.
Claim 17
Dependent Claim
40 words
The improved turbomachinery blade recited in claim 14 wherein said hole in said root portion is slightly larger than the outer diameter of said pin and a braze collar is positioned within the gap between said pin and said hole.
References Cited (Backward Citations)
US2779565A
Cited
US3700348A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-02-17 | 1978-08-19 | 1979-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-17 | 1982-08-19 | 1983-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-17 | 1986-08-19 | 1987-02-18 | $7700.00 | Window Closed / Lapsed |