US3714478A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas cooled dynamoelectric machine
Assignee: General Electric Co
•
Filing: 1972-03-02
•
Granted: 1973-01-30
•
Expires: 1992-03-02
Abstract
Abstract In a large, gas cooled, dynamoelectric machine, the gas coolant is transported to and from the end frames and the machine electromagnetic core by a number of axially disposed pipes which are mounted externally outside of a gas-tight outer wrapper which surrounds the core. All axial gas flow between the core and the end frames is directed through the external pipes. This invention permits a larger diameter rotor and core without increasing the diameter of the outer wrapper.
Inventors
- 👤 S Barton
- 👤 Mania D De
- 👤 A Shartrand
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:53
CPC Classifications
H; H02; H02K; H02K9/00; H02K9/10
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
179 words
In a gas cooled dynamoelectric machine having a rotor disposed within the bore of an electromagnetic core positioned between a pair of end frames, said rotor and said core having an air gap formed therebetween, said electromagnetic core of the type permitting a radially outward and inward flow of gas coolant; and, further including: a plurality of spaced section plates circumferentially mounted along the length of the electromagnetic core; a gas-tight outer wrapper circumscribed about said core and supported by said section plates; a plurality of alternating hot and cold annular gas chambers defined by said wrapper, said core and said section plates; a plurality of hot and cold gas pipes, directed axially along the electromagnetic core and mounted externally of the electromagnetic core frame outer wrapper; and, hot and cold gas plenums in the end frames interconnected respectively with said hot and cold annular gas chambers by said hot and cold gas pipes, whereby the axial transport of gas coolant to and from the end frames is through the externally mounted pipes outside the dynamoelectric machine outer wrapper.
Claim 2
Dependent Claim
179 words
In a gas cooled dynamoelectric machine having a rotor disposed within the bore of an electromagnetic core positioned between a pair of end frames, said rotor and said core having an air gap formed therebetween, said electromagnetic core of the type permitting a radially outward and inward flow of gas coolant; and, further including: a plurality of spaced section plates circumferentially mounted along the length of the electromagnetic core; a gas-tight outer wrapper circumscribed about said core and supported by said section plates; a plurality of alternating hot and cold annular gas chambers defined by said wrapper, said core and said section plates; a plurality of hot and cold gas pipes, directed axially along the electromagnetic core and mounted externally of the electromagnetic core frame outer wrapper; and, hot and cold gas plenums in the end frames interconnected respectively with said hot and cold annular gas chambers by said hot and cold gas pipes, whereby the axial transport of gas coolant to and from the end frames is through the externally mounted pipes outside the dynamoelectric machine outer wrapper.
Claim 3
Dependent Claim
179 words
In a gas cooled dynamoelectric machine having a rotor disposed within the bore of an electromagnetic core positioned between a pair of end frames, said rotor and said core having an air gap formed therebetween, said electromagnetic core of the type permitting a radially outward and inward flow of gas coolant; and, further including: a plurality of spaced section plates circumferentially mounted along the length of the electromagnetic core; a gas-tight outer wrapper circumscribed about said core and supported by said section plates; a plurality of alternating hot and cold annular gas chambers defined by said wrapper, said core and said section plates; a plurality of hot and cold gas pipes, directed axially along the electromagnetic core and mounted externally of the electromagnetic core frame outer wrapper; and, hot and cold gas plenums in the end frames interconnected respectively with said hot and cold annular gas chambers by said hot and cold gas pipes, whereby the axial transport of gas coolant to and from the end frames is through the externally mounted pipes outside the dynamoelectric machine outer wrapper.
Claim 4
Dependent Claim
179 words
In a gas cooled dynamoelectric machine having a rotor disposed within the bore of an electromagnetic core positioned between a pair of end frames, said rotor and said core having an air gap formed therebetween, said electromagnetic core of the type permitting a radially outward and inward flow of gas coolant; and, further including: a plurality of spaced section plates circumferentially mounted along the length of the electromagnetic core; a gas-tight outer wrapper circumscribed about said core and supported by said section plates; a plurality of alternating hot and cold annular gas chambers defined by said wrapper, said core and said section plates; a plurality of hot and cold gas pipes, directed axially along the electromagnetic core and mounted externally of the electromagnetic core frame outer wrapper; and, hot and cold gas plenums in the end frames interconnected respectively with said hot and cold annular gas chambers by said hot and cold gas pipes, whereby the axial transport of gas coolant to and from the end frames is through the externally mounted pipes outside the dynamoelectric machine outer wrapper.
Claim 5
Dependent Claim
31 words
The dynamoelectric machine as recited in claim 1 wherein the outer wrapper and the end frames are formed with portholes for receiving either ends of the hot and cold gas pipes.
Claim 6
Dependent Claim
28 words
The dynamoelectric machine as recited in claim 1 wherein the external pipes are of varying length according to the location of the annular gas chamber which is serviced.
Claim 7
Dependent Claim
28 words
The dynamoelectric machine as recited in claim 1 wherein the section plates comprise a plurality of solid annular rings disposed between the electromagnetic core and the outer wrapper.
Claim 8
Dependent Claim
26 words
The dynamoelectric machine as recited in claim 1 wherein the axial flow of substantially all gas coolant is through external pipes mounted outside the core wrapper.
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) | 1976-01-30 | 1976-07-31 | 1977-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-30 | 1980-07-31 | 1981-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-30 | 1984-07-31 | 1985-01-30 | $7700.00 | Window Closed / Lapsed |