US4222706A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Porous abradable shroud with transverse partitions
Assignee: Safran Aircraft Engines SAS
•
Filing: 1978-08-01
•
Granted: 1980-09-16
•
Expires: 1998-08-01
Abstract
Abstract A turbine housing for a jet engine is provided with a ring of an abradableorous material. A supporting and mounting device consisting of a cylindricoconical monoblock having a conical internal jacket provides for the convection cooling of the external surface and a cylindrical jacket for cooling air is held over the abradable ring by means of a perforated ferrule integral with the rest of the device. The abradable ring carries transverse partitions to prevent axial leakage.
Inventors
- 👤 Michel R. Ayache
- 👤 Pierre A. Glowacki
- 👤 Gerard M. F. Mandet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:52
CPC Classifications
F; F01; F01D; F01D11/00; F01D11/08
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
65 words
In a housing for a jet engine having turbine blades in said housing and a ring including an abradable portion of a sintered porous material surrounding said turbine blades and wherein said ring is cooled by transpiration of air therethrough, the improvement comprising: said ring being provided with partitions within the material of the ring and extending therethrough transverse to the axis of said rotor.
Claim 2
Dependent Claim
65 words
In a housing for a jet engine having turbine blades in said housing and a ring including an abradable portion of a sintered porous material surrounding said turbine blades and wherein said ring is cooled by transpiration of air therethrough, the improvement comprising: said ring being provided with partitions within the material of the ring and extending therethrough transverse to the axis of said rotor.
Claim 3
Dependent Claim
25 words
A housing as defined in claim 1 wherein at least portions of said partitions are oriented obliquely with respect to the axis of said rotor.
Claim 4
Dependent Claim
26 words
A housing as defined in claim 1 wherein the partitions through said sintered material are zones of the material of said ring fused by electron bombardment.
Claim 5
Dependent Claim
34 words
A housing as defined in claim 1 wherein said sintered material is provided on its inner face with grooves at the ends of said partitions, said grooves being adjacent the apexes of said blades.
Claim 6
Dependent Claim
96 words
A housing as defined in claim 1 wherein said housing comprises a monoblock structure of a cylindroconical revolution, having an external cylindrical portion carrying means for securing it to the engine, a conical portion extending from said external cylindrical portion, a perforated cylindrical ferrule secured to the inside of the external conical part at one end and constituting a portion of said ring supporting said sintered material, a conical jacket secured by spacers to the inside of the external conical part and spaced inwardly therefrom, and a perforated cylindrical jacket secured by spacers over said ferrule.
Claim 7
Dependent Claim
18 words
A housing as defined in claim 5 wherein said last-named spacers consist of radial ribs on said ferrule.
Claim 8
Dependent Claim
20 words
A housing as defined in claim 5 wherein said last-named spacers consist of radial ribs on said perforated cylindrical jacket.
Claim 9
Dependent Claim
21 words
A housing as defined in claim 6 wherein said ribs are secured to the sintered material in line with its partitions.
Claim 10
Dependent Claim
21 words
A housing as defined in claim 5 wherein the perforations of said ferrule extend oblique to the axis of said rotor.
Claim 11
Dependent Claim
13 words
A housing as defined in claim 5 wherein said first-named spacers are spheres.
References Cited (Backward Citations)
US3126149A
Cited
US3146992A
Cited
US3365172A
Cited
US3728039A
Cited
US3656862A
Cited
US3825364A
Cited
US3834001A
Cited
US3825365A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-09-16 | 1984-03-17 | 1984-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-09-16 | 1988-03-17 | 1988-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-09-16 | 1992-03-17 | 1992-09-16 | $7700.00 | Window Closed / Lapsed |