Patent US4513975A successfully refreshed from Google Patents.
US4513975A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermally responsive labyrinth seal
Assignee: General Electric Co
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Filing: 1984-04-27
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Granted: 1985-04-30
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Expires: 2004-04-27
Abstract
Abstract An improved rotary labyrinth seal such as may be used in a gas turbine engine. The seal includes a rotor with at least one seal tooth and a stator with an abradable shroud and casing. The first and second members cooperate to inhibit the flow of fluid therebetween. The improvement comprises a conduit for conducting a portion of the fluid through the casing for heat transfer between the fluid and second member. In this manner, the thermal response of the stator is improved.
Inventors
- 👤 Ambrose A. Hauser
- 👤 Rolf R. Hetico
- 👤 Thomas G. Wakeman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:47
CPC Classifications
F; F01; F01D; F01D11/00; F01D11/02; F01D11/04; F16; F16J; F16J15/00; F16J15/16; F16J15/162; F16J15/44; F16J15/443; Y; Y10; Y10S; Y10S277/00; Y10S277/93
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
74 words
In a rotary seal including a first member with at least one ring shaped seal tooth and a second member with an abradable shroud and casing, wherein said members cooperate to inhibit flow of fluid from a first region to a second region, the improvement comprising: a conduit for conducting a portion of said fluid through said casing from said first to said second region for heat transfer between said fluid and said casing.
Claim 2
Dependent Claim
74 words
In a rotary seal including a first member with at least one ring shaped seal tooth and a second member with an abradable shroud and casing, wherein said members cooperate to inhibit flow of fluid from a first region to a second region, the improvement comprising: a conduit for conducting a portion of said fluid through said casing from said first to said second region for heat transfer between said fluid and said casing.
Claim 3
Dependent Claim
73 words
In a rotary labyrinth seal including a rotor with at least one seal tooth and a stator with abradable shroud and casing, wherein said rotor and stator cooperate to inhibit the flow of fluid from a first region to a second region, the improvement comprising: a conduit for conducting a portion of said fluid through said casing from said first to said second region for heat transfer between said fluid and said casing.
Claim 4
Dependent Claim
73 words
In a rotary labyrinth seal including a rotor with at least one seal tooth and a stator with abradable shroud and casing, wherein said rotor and stator cooperate to inhibit the flow of fluid from a first region to a second region, the improvement comprising: a conduit for conducting a portion of said fluid through said casing from said first to said second region for heat transfer between said fluid and said casing.
Claim 5
Dependent Claim
85 words
In a rotary labyrinth seal including a rotor with at least one seal tooth, and a radially outwardly disposed stator with an abradable shroud and casing, said casing having a radially outward facing surface, wherein said rotor and stator cooperate to inhibit the flow of fluid from a first region to a second region, the improvement comprising: a conduit for conducting a portion of said fluid through said casing from said first to said second region for heat transfer between said fluid and said stator.
Claim 6
Dependent Claim
85 words
In a rotary labyrinth seal including a rotor with at least one seal tooth, and a radially outwardly disposed stator with an abradable shroud and casing, said casing having a radially outward facing surface, wherein said rotor and stator cooperate to inhibit the flow of fluid from a first region to a second region, the improvement comprising: a conduit for conducting a portion of said fluid through said casing from said first to said second region for heat transfer between said fluid and said stator.
Claim 7
Dependent Claim
45 words
The improvement, as recited in claim 3, wherein said conduit includes: an annular cavity in thermal contact with said surface; a plurality of first passages connecting said first region with said cavity; and a plurality of second passages connecting said cavity with said second region.
Claim 8
Dependent Claim
20 words
The improvement, as recited in claim 4, wherein said first passages are circumferentially offset with respect to said second passages.
Claim 9
Dependent Claim
106 words
In a rotary labyrinth seal for a gas turbine engine including a first member with at least one seal tooth and a second member with an abradable coating, said tooth and coating cooperating to inhibit the flow of fluid from a first region to a second region, and wherein the thermal growth of said second member is limited by the coefficient of thermal conductivity of said coating, a method for improving the thermal response of said second member comprising: increasing the heat transfer rate of said second member by conducting a portion of said fluid through said second member from said first to said second region.
Claim 10
Dependent Claim
106 words
In a rotary labyrinth seal for a gas turbine engine including a first member with at least one seal tooth and a second member with an abradable coating, said tooth and coating cooperating to inhibit the flow of fluid from a first region to a second region, and wherein the thermal growth of said second member is limited by the coefficient of thermal conductivity of said coating, a method for improving the thermal response of said second member comprising: increasing the heat transfer rate of said second member by conducting a portion of said fluid through said second member from said first to said second region.
References Cited (Backward Citations)
CA875365A
Cited
US2159766A
Cited
CH355462A
Cited
US3527053A
Cited
US3825364A
Cited
US3846899A
Cited
US3823950A
Cited
US4222706A
Cited
US4320903A
Cited
GB2033021A
Cited
SU811028A1
Cited
SU785576A1
Cited
SU830064A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-04-29 | 1988-10-29 | 1989-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-04-29 | 1992-10-29 | 1993-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-04-29 | 1996-10-29 | 1997-04-30 | $7700.00 | Window Closed / Lapsed |