Patent US4517479A successfully refreshed from Google Patents.
US4517479A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Generator armature cooling and air gap sealing system
Assignee: Sundstrand Corp
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Filing: 1983-11-07
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Granted: 1985-05-14
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Expires: 2003-11-07
Abstract
Abstract A rotary electric machine including a housing having a stator. The stator includes an armature winding with end turns extending from opposite ends thereof. A rotor is journalled within the housing and the stator and is separated from the stator by an air gap. At least two nozzles are located within the housing, one adjacent each end of the armature, and directed at an associated set of end turns. A pair of partitions are disposed within the housing, one for each end of the armature. Each partition is located axially outwardly of the associated end turns and nozzle. A first air gap seal includes a resilient gasket sealingly engaging a corresponding one of the partitions and the tips of the adjacent end turns while a second air gap seal includes sheet-like seals interposed between layers of the end turns.
Inventors
- 👤 Mohd A. Aleem
- 👤 Alexander Krinickas, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:00
CPC Classifications
H; H02; H02K; H02K9/00; H02K9/19; H02K9/197
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
149 words
A rotary electric machine comprising: a housing; a stator within said housing including an armature having a winding including layered end turns extending from opposite ends of the armature; a rotor journalled within said housing and said stator and separated from said stator by an air gap; at least two nozzles within said housing, one adjacent each end of said armature and directed at the associated end turns; a pair of partitions within said housing, one for each end of said armature, each being located axially outwardly of the associated end turns and nozzle; first air gap sealing means including a resilient gasket sealingly engaging a corresponding one of said partitions and the tips of adjacent end turns and sheet-like seals engaging and conforming to said end turn tips and engaging and gasket; and second air gap sealing means including sheet-like seals interposed between layers of said end turns.
Claim 2
Dependent Claim
149 words
A rotary electric machine comprising: a housing; a stator within said housing including an armature having a winding including layered end turns extending from opposite ends of the armature; a rotor journalled within said housing and said stator and separated from said stator by an air gap; at least two nozzles within said housing, one adjacent each end of said armature and directed at the associated end turns; a pair of partitions within said housing, one for each end of said armature, each being located axially outwardly of the associated end turns and nozzle; first air gap sealing means including a resilient gasket sealingly engaging a corresponding one of said partitions and the tips of adjacent end turns and sheet-like seals engaging and conforming to said end turn tips and engaging and gasket; and second air gap sealing means including sheet-like seals interposed between layers of said end turns.
Claim 3
Dependent Claim
22 words
The rotary electric machine of claim 1 wherein spaces between conductors forming said end turn tips are filled with a plastic sealant.
Claim 4
Dependent Claim
68 words
The rotary electric machine of claim 1 wherein said housing includes a coolant inlet and one of said nozzles is integrally formed on a ring to open gradually inwardly thereof, and a groove in the radially outer periphery of said ring and in fluid communication with said one nozzle, said ring sealingly engaging an annular interior wall of said housing with said groove aligned with said coolant inlet.
Claim 5
Dependent Claim
19 words
The rotary electric machine of claim 1 wherein said sheet-like seals are formed of insulating material such as aramid.
Claim 6
Dependent Claim
31 words
The rotary electric machine of claim 1 wherein there are a plurality of said nozzles adjacent each end of said armature and located radially outwardly said end turns and directed thereat.
Claim 7
Dependent Claim
126 words
A rotary electric machine comprising a housing; a stator within said housing having a winding including layered end turns extending from opposite ends of the armature; a rotor journalled within said housing and said stator and separated from said stator by an air gap; at least two nozzles within said housing, one adjacent each end of said armature and directed at the associated end turns; a pair of partitions within said housing, one for each end of said armature, each being located axially outwardly of the associated end turns and nozzle; and air gap sealing means including a resilient gasket sealingly engaging a corresponding one of said partitions and the tips of the adjacent end turns said end turn tips are impregnated with a plastic sealant.
Claim 8
Dependent Claim
126 words
A rotary electric machine comprising a housing; a stator within said housing having a winding including layered end turns extending from opposite ends of the armature; a rotor journalled within said housing and said stator and separated from said stator by an air gap; at least two nozzles within said housing, one adjacent each end of said armature and directed at the associated end turns; a pair of partitions within said housing, one for each end of said armature, each being located axially outwardly of the associated end turns and nozzle; and air gap sealing means including a resilient gasket sealingly engaging a corresponding one of said partitions and the tips of the adjacent end turns said end turn tips are impregnated with a plastic sealant.
Claim 9
Dependent Claim
25 words
The rotary electric machine of claim 6 wherein irregularities in said end turn tips are smoothed by sheet-like seals engaging said tips and said gasket.
Claim 10
Dependent Claim
17 words
The rotary electric machine of claim 6 wherein said end turn tips are pressed into said gasket.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-05-13 | 1988-11-12 | 1989-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-05-13 | 1992-11-12 | 1993-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-05-13 | 1996-11-12 | 1997-05-14 | $7700.00 | Window Closed / Lapsed |