Patent US4380356A successfully refreshed from Google Patents.
US4380356A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Generator rotor, especially turbo-generator rotor with superconducting field winding
Assignee: Kraftwerk Union AG
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Filing: 1981-05-20
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Granted: 1983-04-19
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Expires: 2001-05-20
Abstract
Abstract Generator rotor, including an inner and an outer concentric rotor part having a non-drive side and enclosing a high vacuum space, a first and a second bearing disposed on the non-drive side, a hollow shaft end of the outer rotor part being supported in the first bearing, a journal of the inner rotor part being extended through the hollow shaft end and separately supported in the second bearing, a high-vacuum contactless liquid seal disposed between the hollow shaft end and the journal and having a sealing gap formed therebetween, a co-rotating sealing-liquid reservoir connected to the liquid seal, and magnetic field means for holding magnetic sealing liquid in the sealing gap.
Inventors
- 👤 Erich Weghaupt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:02
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/40; F16J15/43; H; H02; H02K; H02K5/00; H02K5/04; H02K5/12; H02K5/124; H02K55/00; H02K55/02; H02K55/04; Y; Y02; Y02E; Y02E40/00; Y02E40/60; Y10; Y10S; Y10S277/00; Y10S277/913; Y10S505/00; Y10S505/825; Y10S505/876; Y10S505/877; Y10S505/878
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
110 words
Generator rotor, comprising an inner and an outer concentric rotor part having a non-drive side and enclosing a high-vacuum space, a first and a second bearing disposed on said non-drive side, a hollow shaft end of said outer rotor part being supported in said first bearing, a journal of said inner rotor part being extended through said hollow shaft end and separately supported in said second bearing, a high-vacuum contactless liquid seal disposed between said hollow shaft end and said journal and having a sealing gap formed therebetween, a co-rotating sealing-liquid reservoir connected to said liquid seal, and magnetic field means for holding magnetic sealing liquid in said sealing gap.
Claim 2
Dependent Claim
110 words
Generator rotor, comprising an inner and an outer concentric rotor part having a non-drive side and enclosing a high-vacuum space, a first and a second bearing disposed on said non-drive side, a hollow shaft end of said outer rotor part being supported in said first bearing, a journal of said inner rotor part being extended through said hollow shaft end and separately supported in said second bearing, a high-vacuum contactless liquid seal disposed between said hollow shaft end and said journal and having a sealing gap formed therebetween, a co-rotating sealing-liquid reservoir connected to said liquid seal, and magnetic field means for holding magnetic sealing liquid in said sealing gap.
Claim 3
Dependent Claim
21 words
Generator rotor according to claim 1, wherein said sealing-liquid reservoir is at least partially disposed radially inward of said sealing gap.
Claim 4
Dependent Claim
40 words
Generator rotor according to claim 1 or 2, wherein said journal has a smaller diameter step integral therewith in the vicinity of said sealing-liquid reservoir, said step being surrounded by said sealing-liquid reservoir in ring fashion leaving a space therebetween.
Claim 5
Dependent Claim
40 words
Generator rotor according to claim 2, wherein said sealing-liquid reservoir has a radially inner boundary being disposed at a radial distance from said sealing gap for adjusting input pressure of sealing-liquid in said sealing gap between predetermined limits in operation.
Claim 6
Dependent Claim
24 words
Generator rotor according to claim 2, wherein said sealing-liquid reservoir has a volume sufficient for compensating all sealing-liquid losses within a predetermined inspection interval.
Claim 7
Dependent Claim
27 words
Generator rotor according to claim 1, wherein said liquid seal has adjoining axially and radially directed canals formed therein connecting said sealing-liquid reservoir to said sealing gap.
Claim 8
Dependent Claim
19 words
Generator rotor according to claim 1, including radially directed partitions subdividing said sealing-liquid reservoir into a plurality of chambers.
Claim 9
Dependent Claim
32 words
Generator rotor according to claim 1, including at least one filling canal leading from outside the rotor of said sealing-liquid reservoir, said filling canal being accessible and closeable from outside the rotor.
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) | 1986-04-18 | 1986-10-18 | 1987-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-04-18 | 1990-10-18 | 1991-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-04-18 | 1994-10-18 | 1995-04-19 | $7700.00 | Window Closed / Lapsed |