US3617068A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Floating ring seal for rotating shafts
Assignee: Brown Boveri Sulzer Turbomaschinen AG
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Filing: 1970-02-27
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Granted: 1971-11-02
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Expires: 1990-02-27
Abstract
Abstract The two sealing rings are arranged so that substantially all the sealant and coolant medium flows first through the sealing ring on the high-pressure side to dissipate heat therein. The medium then flows into the space between the sealing rings and is distributed into the sealing gaps between the sealing rings and shaft.
Inventors
- 👤 Walter Sprenger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:36
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/44; F16J15/441; F01; F01D; F01D11/00; F01D11/02; F01D11/04; F16J15/16; F16J15/40; H; H10; H10W; H10W72/00; H10W72/20; Y; Y10; Y10S; Y10S277/00; Y10S277/93
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
157 words
A seal for rotating shaft comprising means defining an annular chamber and an inlet port for the introduction of a barrier medium into said chamber; and a pair of closely spaced sealing rings disposed within said chamber for surrounding the shaft with respective radial clearances to form respective sealing gaps therebetween, said sealing rings being closely spaced to define a space therebetween in communication with said sealing gaps, each said sealing ring bearing with at least one annular part of an endface facing away from the other of said sealing rings against said means defining said chamber, one of said sealing rings having means therein on one side of said annular part thereof for directing the barrier medium from said inlet port through said one sealing ring into said space between said rings to cool said one sealing ring whereby heat generated by hydraulic friction in said sealing gap defined by said one sealing ring is dissipated.
Claim 2
Dependent Claim
157 words
A seal for rotating shaft comprising means defining an annular chamber and an inlet port for the introduction of a barrier medium into said chamber; and a pair of closely spaced sealing rings disposed within said chamber for surrounding the shaft with respective radial clearances to form respective sealing gaps therebetween, said sealing rings being closely spaced to define a space therebetween in communication with said sealing gaps, each said sealing ring bearing with at least one annular part of an endface facing away from the other of said sealing rings against said means defining said chamber, one of said sealing rings having means therein on one side of said annular part thereof for directing the barrier medium from said inlet port through said one sealing ring into said space between said rings to cool said one sealing ring whereby heat generated by hydraulic friction in said sealing gap defined by said one sealing ring is dissipated.
Claim 3
Dependent Claim
33 words
A seal as set forth in claim 1 wherein said means for directing the barrier medium through said one sealing ring comprises a plurality of axial ports passing through said one sealing ring.
Claim 4
Dependent Claim
33 words
A seal as set forth in claim 1 wherein said one sealing ring is of porous material with passageways therein forming said means for directing the barrier medium through said one sealing ring.
Claim 5
Dependent Claim
33 words
A seal as set forth in claim 1 which further comprises a plurality of axially acting springs between said sealing rings biasing said sealing rings apart and against said means defining said chamber.
Claim 6
Dependent Claim
26 words
A seal as set forth in claim 1 which further comprises means for preventing rotation of said sealing rings relative to said means defining said chamber.
Claim 7
Dependent Claim
53 words
A seal as set forth in claim 5 wherein said means for preventing rotation include a plurality of pins secured in each sealing ring and extending into said means defining said chamber with axial and radial clearance to permit slight axial and radial Movement of said sealing rings relative to said latter means.
Claim 8
Dependent Claim
64 words
A seal as set forth in claim 1 wherein said one sealing ring includes coaxial helically curved grooves in the inner circumferential surface having a direction of pitch to exert a force in the direction of said space between said sealing rings on a film of the barrier medium in said sealing gap defined by said one sealing ring when the shaft is rotating.
Claim 9
Dependent Claim
50 words
A seal as set forth in claim 1 wherein said means defining said chamber includes a sleeve having a radially inwardly directed flange at one end abutting said annular part of one sealing ring and a sealing flange abutting said sleeve opposite said flange and abutting the other sealing ring.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-01 | 1975-05-03 | 1975-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-01 | 1979-05-03 | 1979-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-01 | 1983-05-03 | 1983-11-02 | $7700.00 | Window Closed / Lapsed |