US3689786A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dynamo electric machines
Assignee: Lucas Support Services Ltd
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Filing: 1971-05-26
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Granted: 1972-09-05
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Expires: 1991-05-26
Abstract
Abstract This invention relates to a dynamo electric machine having a rotatable shaft with at least one machine component mounted on the shaft for rotation therewith. The shaft has an axial bore for the passage of a cooling fluid and cooling fluid distributor means mounted on the shaft for discharging cooling fluid on to the component. The cooling fluid distributor means comprises an annular chamber which communicates with the axial bore and with flow control means, the latter ensuring an even or substantially even discharge of fluid therefrom by means of centrifugal force when, in use, the shaft, the component, and the cooling fluid distributor means are rotated.
Inventors
- 👤 Peter Hunt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:53
CPC Classifications
H; H02; H02K; H02K9/00; H02K9/19
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
187 words
A dynamo electric machine having a rotatable shaft, at least one machine component mounted on the shaft for rotation therewith, an axial bore within the shaft for the passage of a cooling fluid and cooling fluid distributor means mounted on said shaft for discharging cooling fluid onto said component, said cooling fluid distributor means comprising an annular chamber which communicates with said axial bore and flow control means with which said annular chamber also communicates, said flow control means comprising an annular weir arranged so that the free edge of the weir is disposed radially inwardly of a plurality of apertures formed in a wall of said annular chamber and through which apertures cooling fluid can in use pass between said annular chamber and said annular weir, the arrangement being such that in use an annular reservoir of cooling fluid will be formed behind the weir when the shaft is rotated, said reservoir being filled by means of cooling fluid which flows through said apertures and which is then held in position behind the weir from which it is subsequently evenly discharged by means of centrifugal force.
Claim 2
Dependent Claim
187 words
A dynamo electric machine having a rotatable shaft, at least one machine component mounted on the shaft for rotation therewith, an axial bore within the shaft for the passage of a cooling fluid and cooling fluid distributor means mounted on said shaft for discharging cooling fluid onto said component, said cooling fluid distributor means comprising an annular chamber which communicates with said axial bore and flow control means with which said annular chamber also communicates, said flow control means comprising an annular weir arranged so that the free edge of the weir is disposed radially inwardly of a plurality of apertures formed in a wall of said annular chamber and through which apertures cooling fluid can in use pass between said annular chamber and said annular weir, the arrangement being such that in use an annular reservoir of cooling fluid will be formed behind the weir when the shaft is rotated, said reservoir being filled by means of cooling fluid which flows through said apertures and which is then held in position behind the weir from which it is subsequently evenly discharged by means of centrifugal force.
Claim 3
Dependent Claim
16 words
A dynamo electric machine as claimed in claim 1 wherein said component is a rotor winding.
Claim 4
Dependent Claim
15 words
A dynamo electric machine as claimed in claim 1 wherein said component is a rectifier.
Claim 5
Dependent Claim
52 words
A dynamo electric machine as claimed in claim 1 wherein said annular weir is disposed within a further annular chamber which is formed in its outer wall with a plurality of openings through which cooling fluid will, in use be discharged, said apertured wall forming a partition between the two annular chambers.
Claim 6
Dependent Claim
31 words
A dynamo electric machine as claimed in claim 4 wherein said openings formed in the peripheral wall of said further chamber are in the form of axially extending circumferentially spaced slots.
Claim 7
Dependent Claim
45 words
A dynamo electric machine as claimed in claim 2 wherein the end turns of said winding are axially spaced from each other, the arrangement being such that fluid discharging from the flow control means passes between the end turns to effect more efficient cooling thereof.
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) | 1975-09-05 | 1976-03-06 | 1976-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-05 | 1980-03-06 | 1980-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-05 | 1984-03-06 | 1984-09-05 | $7700.00 | Window Closed / Lapsed |