Patent US4629397A successfully refreshed from Google Patents.
US4629397A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Structural component for use under high thermal load conditions
Assignee: Siemens Corp
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Filing: 1984-07-02
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Granted: 1986-12-16
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Expires: 2004-07-02
Abstract
Abstract A structural component which is coolable for use under high thermal load conditions, such as a turbine blade, has a metallic support core with cooling ducts separated by lands in its surface. The core and its cooling ducts and lands are enclosed by an inner layer of metal felt and an outer layer of heat insulating ceramic material which partially penetrates into the metal felt to form a bonding zone between the felt and the ceramic material. Thus, any heat passing through the ceramic layer is introduced into the large surface area of the metal felt enabling the latter to efficiently introduce the heat into a cooling medium flowing in the ducts, thereby preventing thermal loads from adversely affecting the metal core to any appreciable extent.
Inventors
- 👤 Klaus Schweitzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:29
CPC Classifications
F; F01; F01D; F01D11/00; F01D11/08; F01D11/12; F01D25/00; F01D25/005; F01D5/00; F01D5/12; F01D5/28; F01D5/284; Y; Y10; Y10S; Y10S165/00; Y10S165/907; Y10T; Y10T428/00; Y10T428/12; Y10T428/12444; Y10T428/12493; Y10T428/12535; Y10T428/12611
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
190 words
A structural component for use under high thermal load conditions, comprising a supporting metal core, unobstructed cooling ducts integrally formed in the surface of said metal core for guiding a cooling medium inside said cooling ducts, lands in the surface of said metal core for separating said cooling ducts from one another, a first heat conducting layer (4) of a metal felt covering said lands and ducts for enclosing said metal core, said metal felt layer providing for an effective heat conduction all around said metal core, means securing said metal felt to said lands of said metal core, and a second outer layer (6) of ceramic material intimately bonded to said first layer (4) of metal felt, said metal felt layer spacing said ceramic layer from said lands for guiding said cooling medium uniformly into heat exchange contact with the entire inner surface of said ceramic material of said second layer (6) which encloses said structural component as a heat insulating ceramic layer, whereby any heat from said heat insulating layer is conducted efficiently into said cooling ducts for a uniform cooling avoiding thermal stress in said ceramic material.
Claim 2
Dependent Claim
190 words
A structural component for use under high thermal load conditions, comprising a supporting metal core, unobstructed cooling ducts integrally formed in the surface of said metal core for guiding a cooling medium inside said cooling ducts, lands in the surface of said metal core for separating said cooling ducts from one another, a first heat conducting layer (4) of a metal felt covering said lands and ducts for enclosing said metal core, said metal felt layer providing for an effective heat conduction all around said metal core, means securing said metal felt to said lands of said metal core, and a second outer layer (6) of ceramic material intimately bonded to said first layer (4) of metal felt, said metal felt layer spacing said ceramic layer from said lands for guiding said cooling medium uniformly into heat exchange contact with the entire inner surface of said ceramic material of said second layer (6) which encloses said structural component as a heat insulating ceramic layer, whereby any heat from said heat insulating layer is conducted efficiently into said cooling ducts for a uniform cooling avoiding thermal stress in said ceramic material.
Claim 3
Dependent Claim
21 words
The structural component of claim 1, wherein said securing means comprise a solder for securing said metal felt to said lands.
Claim 4
Dependent Claim
21 words
The structural component of claim 1, wherein said securing means comprise a welding for securing said metal felt to said lands.
Claim 5
Dependent Claim
21 words
The structural component of claim 1, wherein said securing means comprise an adhesive for securing said metal felt to said lands.
Claim 6
Dependent Claim
21 words
The structural component of claim 1, wherein said metal felt is made of a high temperature resistant and corrosion resistant alloy.
Claim 7
Dependent Claim
13 words
The structural component of claim 5, wherein said alloy is a nickel alloy.
Claim 8
Dependent Claim
13 words
The structural component of claim 5, wherein said alloy is a cobalt alloy.
Claim 9
Dependent Claim
15 words
The structural component of claim 5, wherein said alloy is a nickel and cobalt alloy.
Claim 10
Dependent Claim
34 words
The structural component of claim 1, wherein said second layer of ceramic material partially penetrates into said first layer of metal felt for forming an intimate bonding zone between the first and second layers.
Claim 11
Dependent Claim
35 words
The structural component of claim 9, wherein said int ate bonding zone and said second layer of ceramic material are formed by thermal spraying of the ceramic material onto the first layer of metal felt.
Claim 12
Dependent Claim
39 words
The structural component of claim 9, wherein said intimate bonding zone and said second layer of ceramic material are formed by a combination of slurry dipping and sintering the ceramic material into said metal felt in said bonding zone.
Claim 13
Dependent Claim
29 words
The structural component of claim 9, wherein said intimate bonding zone and said second layer of ceramic material are formed by a chemical deposition out of a vapor phase.
Claim 14
Dependent Claim
17 words
The structural component of claim 1, wherein said heat insulating ceramic layer has a polished outer surface.
Claim 15
Dependent Claim
16 words
The structural component of claim 1, wherein said heat insulating ceramic layer has an aerodynamic shape.
Claim 16
Dependent Claim
22 words
The structural component of claim 1, wherein said heat insulating ceramic layer has an aerodynamic shape, the surface of which is polished.
Claim 17
Dependent Claim
23 words
The structural component of claim 1, wherein said heat insulating ceramic layer is made of zirconium oxide which is partially or fully stabilized.
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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) | 1989-12-15 | 1990-06-16 | 1990-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-12-15 | 1994-06-16 | 1994-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-12-15 | 1998-06-16 | 1998-12-16 | $7700.00 | Window Closed / Lapsed |