US3849680A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid cooled rotor for dynamoelectric machines
Assignee: Westinghouse Electric Corp
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Filing: 1974-01-24
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Granted: 1974-11-19
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Expires: 1994-01-24
Abstract
Abstract A liquid cooled rotor is provided for machines such as large turbine generators in which provision is made for draining off and collecting any leakage of coolant liquid that may occur in such a manner that the possibility of damage is avoided. This is accomplished by draining any leakage liquid through passages in the slots to the end of the rotor where it is discharged from the rotor and collected.
Inventors
- 👤 P Heller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:26
CPC Classifications
H; H02; H02K; H02K9/00
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
76 words
In a dynamoelectric machine having stator and rotor members, said rotor member having winding conductors disposed in longitudinal slots and means for circulating coolant liquid in thermal relation with said conductors, means on the rotor for receiving any leakage of said liquid and directing the leakage liquid to one end of the rotor, means for discharging liquid from said end of the rotor, and means on the stator member for receiving liquid discharged from the rotor.
Claim 2
Dependent Claim
76 words
In a dynamoelectric machine having stator and rotor members, said rotor member having winding conductors disposed in longitudinal slots and means for circulating coolant liquid in thermal relation with said conductors, means on the rotor for receiving any leakage of said liquid and directing the leakage liquid to one end of the rotor, means for discharging liquid from said end of the rotor, and means on the stator member for receiving liquid discharged from the rotor.
Claim 3
Dependent Claim
28 words
The combination of claim 1 in which the last-mentioned means comprises a circular baffle encircling the end of the rotor to receive said liquid and drain it off.
Claim 4
Dependent Claim
43 words
The combination of claim 1 in which said rotor includes a retaining ring at said end, and a series of passages and grooves in said slots and retaining ring for receiving leakage liquid and directing it to the end of the retaining ring.
Claim 5
Dependent Claim
26 words
The combination of claim 3 and including means at the end of the retaining ring for receiving said leakage liquid and disCharging it from the rotor.
Claim 6
Dependent Claim
99 words
A rotor for a dynamoelectric machine comprising a body portion having longitudinal slots therein, winding conductors in said slots including duct means for circulation of a coolant liquid, means in each slot providing a passage extending longitudinally to the end of the slot, a retaining ring at the end of said body portion, means on said retaining ring for collecting leakage liquid flowing in any of said passages, means on the retaining ring for directing said leakage liquid to the end of the retaining ring remote from the body portion, and means for discharging said liquid from the rotor.
Claim 7
Dependent Claim
99 words
A rotor for a dynamoelectric machine comprising a body portion having longitudinal slots therein, winding conductors in said slots including duct means for circulation of a coolant liquid, means in each slot providing a passage extending longitudinally to the end of the slot, a retaining ring at the end of said body portion, means on said retaining ring for collecting leakage liquid flowing in any of said passages, means on the retaining ring for directing said leakage liquid to the end of the retaining ring remote from the body portion, and means for discharging said liquid from the rotor.
Claim 8
Dependent Claim
42 words
A rotor as defined in claim 5 in which the retaining ring overlaps the ends of the slots, and said leakage liquid collecting means comprises an annular groove on the inner surface of the retaining ring communicating with all of said passages.
Claim 9
Dependent Claim
34 words
A rotor as defined in claim 6 in which said directing means for leakage liquid comprises at least one longitudinal groove on the inner surface of the retaining ring communicating with said annular groove.
Claim 10
Dependent Claim
66 words
A rotor as defined in claim 7 in which said conductors have end portions outside the slots extending under the retaining ring to be supported thereby, and at least one additional annular groove on the inner surface of the retaining ring intersecting said longitudinal grooves, the annular grooves and longitudinal grooves being positioned to collect any leakage liquid from said end portions of the winding conductors.
Claim 11
Dependent Claim
38 words
A rotor as defined in claim 5 and including an end plate at the end of the retaining ring, said end plate having means for receiving liquid from the retaining ring and having means for discharging said liquid.
Claim 12
Dependent Claim
50 words
A rotor as defined in claim 5 and including an end plate at the end of the retaining ring, said end plate having an annular groove therein positioned to receive liquid from the retaining ring, and the end plate having a plurality of discharge holes for discharging said liquid therefrom.
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) | 1977-11-18 | 1978-05-20 | 1978-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-18 | 1982-05-20 | 1982-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-18 | 1986-05-20 | 1986-11-19 | $7700.00 | Window Closed / Lapsed |