US4669954A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Abradable turbine rings and turbines thus obtained
Assignee: Societe Europeenne de Propulsion SEP SA
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Filing: 1986-01-21
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Granted: 1987-06-02
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Expires: 2006-01-21
Abstract
Abstract The present invention relates to abradable rings for turbines, wherein they are constituted by an abradable refractory material and are formed by at least one open ring maintained clamped against a fixed metallic structure with the aid of at least one spring, and to refractory materials which may be used for making said rings.
Inventors
- 👤 Georges Habarou
- 👤 Jacques Etienne
- 👤 Jean-Claude Clebant
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:31
CPC Classifications
F; F01; F01D; F01D11/00; F01D11/08; F01D11/12; F01D11/122
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
93 words
A turbine ring assembly comprising: a fixed outer annular metallic structure; an inner ring mounted within said fixed outer annular metallic structure and formed by an adradable refractory material, said inner ring being opened at its periphery to leave at least one gap between opposite faces of an opening in said inner ring so as to allow said inner to expand circumferentially; and spring means acting on the opposite faces of the opening in said inner ring to clamp said inner ring radially in the direction of said fixed outer annular metallic structure.
Claim 2
Dependent Claim
93 words
A turbine ring assembly comprising: a fixed outer annular metallic structure; an inner ring mounted within said fixed outer annular metallic structure and formed by an adradable refractory material, said inner ring being opened at its periphery to leave at least one gap between opposite faces of an opening in said inner ring so as to allow said inner to expand circumferentially; and spring means acting on the opposite faces of the opening in said inner ring to clamp said inner ring radially in the direction of said fixed outer annular metallic structure.
Claim 3
Dependent Claim
26 words
A turbine ring assembly as claimed in claim 1, further comprising ceramic insulating means interposed between said inner ring and said fixed outer annular metallic structure.
Claim 4
Dependent Claim
43 words
A turbine ring assembly as claimed in claim 1, wherein the abradable refractory material which forms said inner ring is obtained by destruction of carbon in a composite material formed by chemical vapor deposition of a refractory material within a fibrous carbon structure.
Claim 5
Dependent Claim
50 words
A turbine ring assembly as claimed in claim 3, wherein said inner ring has an inner abradable surface, wherein said fibrous carbon structure is formed of unidirectional oriented fibers, and wherein the direction of the unidirectionally oriented fibers is substantialy perpendicular to the inner abradable surface of said inner ring.
Claim 6
Dependent Claim
42 words
A turbine assembly as claimed in claim 2, wherein the abradable refractory material which forms said inner ring is obtained by destruction of carbon in a composite material formed by chemical vapor desition of a refractory material within a fibrous carbon structure.
Claim 7
Dependent Claim
50 words
A turbine ring assembly as claimed in claim 4, wherein said inner ring has an inner abradable surface, wherein said fibrous carbon structure is formed of unidirectionally oriented fibers, and wherein the direction of the unidirectionally oriented fibers is substantially perpendicular to the inner abradable surface of said inner ring.
References Cited (Backward Citations)
GB268382A
Cited
GB1189698A
Cited
FR1541195A
Cited
US3854843A
Cited
GB1500135A
Cited
FR2373348A1
Cited
US4135851A
Cited
GB2059806A
Cited
US4336276A
Cited
US4398866A
Cited
EP0076731A2
Cited
US4488920A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-06-01 | 1990-12-01 | 1991-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-06-01 | 1994-12-01 | 1995-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-06-01 | 1998-12-01 | 1999-06-02 | $7700.00 | Window Closed / Lapsed |