US3822389A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid coolant pressurizing device for dynamoelectric machines
Assignee: General Electric Co
•
Filing: 1972-08-24
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Granted: 1974-07-02
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Expires: 1992-08-24
Abstract
Abstract A gas-cooled, liquid-cooled dynamoelectric machine, in one embodiment, includes a gas supply connected to a liquid coolant storage tank for providing a temporary static pressure increase throughout a liquid coolant system in response to transient dynamoelectric machine overload conditions. Overload conditions are detected by an electrical or thermal sensor connected to a valve actuator connected between the gas supply and the storage tank. The increase in the static pressure raises the boiling point of the liquid coolant throughout the liquid coolant system thereby increasing the heat removal capability of the liquid coolant system. Upon the cessation of the overload, the static pressure in the liquid coolant is reduced to its normal, steadystate, operating pressure.
Inventors
- 👤 H Kudlacik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:28
CPC Classifications
H; H02; H02K; H02K9/00; H02K9/24
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
107 words
A dynamoelectric machine including a gas tight outer casing filled with a gas coolant and liquid cooled electrically conductive dynamoelectric machine parts wherein the gas coolant pressure exceeds the liquid coolant pressure during normal, steady-state operating conditions; a liquid coolant system for circulating liquid coolant through said dynamoelectric machine parts and a liquid coolant storage tank; said dynamoelectric machine further comprising: means connected to said liquid coolant storage tank for pressurizing the liquid coolant system; sensing means for detecting dynamoelectric machine overload conditions; and, means interconnecting said sensing means and said fluid pressuring means for triggering said pressurizing means in response to said dynamoelectric machine overload conditions.
Claim 2
Dependent Claim
107 words
A dynamoelectric machine including a gas tight outer casing filled with a gas coolant and liquid cooled electrically conductive dynamoelectric machine parts wherein the gas coolant pressure exceeds the liquid coolant pressure during normal, steady-state operating conditions; a liquid coolant system for circulating liquid coolant through said dynamoelectric machine parts and a liquid coolant storage tank; said dynamoelectric machine further comprising: means connected to said liquid coolant storage tank for pressurizing the liquid coolant system; sensing means for detecting dynamoelectric machine overload conditions; and, means interconnecting said sensing means and said fluid pressuring means for triggering said pressurizing means in response to said dynamoelectric machine overload conditions.
Claim 3
Dependent Claim
25 words
The dynamoelectric machine recited in claim 1 wherein the pressurizing means includes a gas supply, including a valve, connected to said liquid coolant storage tank.
Claim 4
Dependent Claim
25 words
The dynamoelectric machine recited in claim 2 wherein the triggering means includes a valve actuator connected to said sensing means and said gas supply valve.
Claim 5
Dependent Claim
31 words
The dynamoelectric machine recited in claim 1 wherein the sensing means is temperature responsive and includes at least one thermocouple located at the liquid coolant outlet end of the dynamoelectric machine.
Claim 6
Dependent Claim
16 words
The dynamoelectric machine according to claim 1 wherein the sensing means is responsive to electric current.
Claim 7
Dependent Claim
16 words
The dynamoelectric machine according to claim 1 wherein the liquid-cooled dynamoelectric machine parts are stator bars.
References Cited (Backward Citations)
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US2970232A
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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) | 1977-07-01 | 1977-12-31 | 1978-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-01 | 1981-12-31 | 1982-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-01 | 1985-12-31 | 1986-07-02 | $7700.00 | Window Closed / Lapsed |