Patent US3314428A successfully refreshed from Google Patents.
US3700348A
Expired / Lapsed
US
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Turbomachinery blade structure
Assignee: General Electric Co
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Filing: 1968-08-13
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Granted: 1972-10-24
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Expires: 1988-08-13
Abstract
Abstract An economically fabricated turbomachinery blade structure with good and predictable high temperature characteristics having a hollow integrally cast member defining the blade portion, the platform portion, a transition shank portion defining an opening to the blade chamber and a pair of juxtaposed rails extending therefrom. A hollow insert, formed with a plurality of nozzles in the side walls thereof, is secured within the cast member chamber so as to direct coolant fluid against the inner surfaces of the blade portion. To provide means enabling attachment of the blade to a supporting rotor, in one form, the juxtaposed rails are formed into abutting contact at their free ends and bonded. In another form, a root insert is provided which is secured to the inner surfaces of shank rails. Suitable passages are provided to direct coolant fluid into the insert chamber and to discharge the coolant fluid through the trailing edge and the end closure of the blade. Means may be provided to automatically space the insert nozzles from the blade side walls. A plurality of posts may be provided in the trailing edge portion of the blade to increase the effective convection cooling area. All bonds subjected to structural loading are spaced from the blade portion and positioned to be bathed in coolant fluid so as to reduce their operating temperature environment.
Inventors
- 👤 Robert J Corsmeier
- 👤 Thomas G Howell
- 👤 Charles E Corrigan
- 👤 Bernard L Koff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:48
CPC Classifications
F; F01; F01D; F01D5/00; F01D5/12; F01D5/14; F01D5/18; F01D5/187; F01D5/188; F01D5/189; F05; F05D; F05D2260/00; F05D2260/20; F05D2260/201
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
256 words
A turbomachinery blade structure comprising: a hollow, integrally cast member including a platform portion adapted to define, in part, an inner boundary of a motive fluid passage, a blade portion projecting from said platform portion, a transition shank projecting from said platform portion generally oppositely to said blade portion and defining an opening to said hollow cast member, and a pair of juxtaposed shank rails projecting from said transition shank; a hollow insert slideably received within said hollow cast member blade portion in spaced relationship thereto, said insert formed with an open inner end for receiving a coolant fluid, a closed outer end and a plurality of apertures for impinging said coolant fluid against said cast member blade portion; means for discharging said coolant fluid from said hollow cast member blade portion; a mounting collar formed with a passage therethrough, the open end of said insert secured to said collar in flow communication with said collar passage, said collar including a flange secured to said tubular shank in closing relationship to said shank opening; means enabling attachment of said blade structure to a supporting rotor with said blade portion extending generally radially therefrom, said attachment means comprising abutting, bonded together radial inner ends of said shank rails; at least one passage formed through said abutting, bonded together ends of said shank rails; and means extending between said shank rails adjacent the leading and trailing edges thereof for closing the openings defined between such edges and directing fluid from said shank rail passage to said collar passage.
Claim 2
Dependent Claim
256 words
A turbomachinery blade structure comprising: a hollow, integrally cast member including a platform portion adapted to define, in part, an inner boundary of a motive fluid passage, a blade portion projecting from said platform portion, a transition shank projecting from said platform portion generally oppositely to said blade portion and defining an opening to said hollow cast member, and a pair of juxtaposed shank rails projecting from said transition shank; a hollow insert slideably received within said hollow cast member blade portion in spaced relationship thereto, said insert formed with an open inner end for receiving a coolant fluid, a closed outer end and a plurality of apertures for impinging said coolant fluid against said cast member blade portion; means for discharging said coolant fluid from said hollow cast member blade portion; a mounting collar formed with a passage therethrough, the open end of said insert secured to said collar in flow communication with said collar passage, said collar including a flange secured to said tubular shank in closing relationship to said shank opening; means enabling attachment of said blade structure to a supporting rotor with said blade portion extending generally radially therefrom, said attachment means comprising abutting, bonded together radial inner ends of said shank rails; at least one passage formed through said abutting, bonded together ends of said shank rails; and means extending between said shank rails adjacent the leading and trailing edges thereof for closing the openings defined between such edges and directing fluid from said shank rail passage to said collar passage.
Claim 3
Dependent Claim
56 words
The structure of claim 1 further characterized in that said blade portion includes a leading edge, a trailing edge, generally airfoil shaped sidewalls extending therebetween, and an end closure wall, said means for discharging coolant fluid from said cast member chamber comprising a plurality of passages formed through said trailing edge and said end closure wall.
Claim 4
Dependent Claim
40 words
The structure of claim 2 further characterized in that the portion of said cast member chamber adjacent said trailing edge passages contains a plurality of posts extending thereacross and joining said blade side walls to thereby increase convective heat transfer.
Claim 5
Dependent Claim
29 words
The structure of claim 1 further characterized in that said insert includes means, integRally formed therewith, for automatically establishing said spaced relationship between said nozzles and said cast member.
Claim 6
Dependent Claim
213 words
A turbomachinery blade structure comprising: a hollow, integrally cast member including a platform portion adapted to define, in part, an inner boundary of a motive fluid passage, a blade portion projecting from said platform portion, a transition shank portion projecting from said platform portion generally oppositely to said blade portion and defining an opening to said hollow cast member, and a pair of juxtaposed shank rails projecting from said transition shank; a hollow insert slideably received within said hollow cast member blade portion in spaced relationship thereto, said insert formed with an open inner end for receiving a coolant fluid, a closed outer end and a plurality of apertures for impinging said coolant fluid against said cast member blade portion; means for discharging said coolant fluid from said hollow cast member blade portion; means enabling attachment of said blade structure to a supporting rotor with said blade portion extending generally radially therefrom, said attachment means comprising a root insert extending between and bonded to said shank rails, and said root insert formed with at least one radially extending passage therethrough, said hollow insert secured to said root insert with said hollow insert open end in flow communication with said root insert passage; and means extending between said rails for closing said shank opening.
Claim 7
Dependent Claim
213 words
A turbomachinery blade structure comprising: a hollow, integrally cast member including a platform portion adapted to define, in part, an inner boundary of a motive fluid passage, a blade portion projecting from said platform portion, a transition shank portion projecting from said platform portion generally oppositely to said blade portion and defining an opening to said hollow cast member, and a pair of juxtaposed shank rails projecting from said transition shank; a hollow insert slideably received within said hollow cast member blade portion in spaced relationship thereto, said insert formed with an open inner end for receiving a coolant fluid, a closed outer end and a plurality of apertures for impinging said coolant fluid against said cast member blade portion; means for discharging said coolant fluid from said hollow cast member blade portion; means enabling attachment of said blade structure to a supporting rotor with said blade portion extending generally radially therefrom, said attachment means comprising a root insert extending between and bonded to said shank rails, and said root insert formed with at least one radially extending passage therethrough, said hollow insert secured to said root insert with said hollow insert open end in flow communication with said root insert passage; and means extending between said rails for closing said shank opening.
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) | 1975-10-24 | 1976-04-24 | 1976-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-24 | 1980-04-24 | 1980-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-24 | 1984-04-24 | 1984-10-24 | $7700.00 | Window Closed / Lapsed |