US4722663A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Seal-off mechanism for rotating turbine shaft
Assignee: GE Oil and Gas Operations LLC
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Filing: 1986-02-04
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Granted: 1988-02-02
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Expires: 2006-02-04
Abstract
Abstract A seal-off mechanism for preventing migration of working fluid along a turbine shaft which includes a floating seal ring and a shaft shoulder. The seal ring is spring biased against the shaft shoulder. During turbine operation, a pressurized fluid moves the ring away from the shoulder. The pressurized fluid then flows toward the turbine to contain the working fluid. A chamber collects the pressurized fluid and the working fluid for subsequent separation and reuse.
Inventors
- 👤 Judson S. Swearingen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:39
CPC Classifications
F; F01; F01D; F01D25/00; F01D25/18; F01D25/183; F01D25/186; F01D11/00; F01D11/02; F01D11/04; F01D11/06; F16; F16J; F16J15/00; F16J15/002; F16J15/008; F16J15/16; F16J15/34; Y; Y10; Y10S; Y10S277/00; Y10S277/918
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
168 words
A turbine comprising: a turbine housing having a rotor cavity; a rotor in said cavity; a first bearing fixed in said housing and displaced from said rotor cavity; a shaft rotatably mounted in said bearing, said rotor being fixed to said shaft, said shaft having an annular shoulder facing toward said rotor between said first bearing and said rotor; a seal cavity between said rotor cavity and said first bearing about said shaft in said housing; a bearing cavity in said housing between said first bearing and said seal cavity; a seal ring in said housing about said shaft resiliently biased against said shoulder between said bearing cavity and said seal cavity; and vent means for venting said bearing cavity to a preselected differential pressure of said bearing cavity over said seal cavity, said vent means including a bearing cavity vent for said bearing cavity, a valve controlling said bearing cavity vent and a valve controller actuated by differential pressure between said bearing cavity and said seal cavity.
Claim 2
Dependent Claim
168 words
A turbine comprising: a turbine housing having a rotor cavity; a rotor in said cavity; a first bearing fixed in said housing and displaced from said rotor cavity; a shaft rotatably mounted in said bearing, said rotor being fixed to said shaft, said shaft having an annular shoulder facing toward said rotor between said first bearing and said rotor; a seal cavity between said rotor cavity and said first bearing about said shaft in said housing; a bearing cavity in said housing between said first bearing and said seal cavity; a seal ring in said housing about said shaft resiliently biased against said shoulder between said bearing cavity and said seal cavity; and vent means for venting said bearing cavity to a preselected differential pressure of said bearing cavity over said seal cavity, said vent means including a bearing cavity vent for said bearing cavity, a valve controlling said bearing cavity vent and a valve controller actuated by differential pressure between said bearing cavity and said seal cavity.
Claim 3
Dependent Claim
11 words
The turbine of claim 1 further comprising a seal cavity vent.
References Cited (Backward Citations)
US2418707A
Cited
FR1023343A
Cited
US2936715A
Cited
US2913989A
Cited
US2910328A
Cited
US2895751A
Cited
GB896482A
Cited
GB923098A
Cited
JPS4416618Y1
Cited
US3475033A
Cited
DE2632649A1
Cited
US4193603A
Cited
US4495035A
Cited
US4587076A
Cited
US4428584A
Cited
US4477223A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-02-01 | 1991-08-03 | 1992-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-02-01 | 1995-08-03 | 1996-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-02-01 | 1999-08-03 | 2000-02-02 | $7700.00 | Window Closed / Lapsed |