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 03:36
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.
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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) | 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 |