US3755702A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flow surge equipment for dynamoelectric machine
Assignee: General Electric Co
•
Filing: 1972-07-31
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Granted: 1973-08-28
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Expires: 1992-07-31
Abstract
Abstract In a dynamoelectric machine with liquid-cooled element there is provided, according to the present invention, means for forcing an increased quantity of liquid coolant through the liquid coolant system during brief periods of dynamoelectric machine transient overload as well as on a regular periodic basis. Two beneficial results are thereby obtained. First, the heat removal capability of the liquid coolant system is transiently increased permitting normal operation at higher levels of initial power density; second, the flow surge of liquid coolant tends to purge the liquid coolant system of foreign particles.
Inventors
- 👤 D Willyoung
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:48
CPC Classifications
H; H02; H02K; H02K9/00; H02K9/26; H02K9/19; H02K9/197; H02K9/24
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
140 words
In a dynamoelectric machine including an outer casing and electrically conductive dynamoelectric machine parts contained therein having a liquid coolant distributed therethrough; said dynamoelectric machine further including a liquid coolant system for circulating the liquid coolant through said dynamoelectric machine parts; and flow surge means for providing a temporary flow surge of liquid coolant to said liquid coolant system, said flow surge means including: a surge tank, interconnected with said liquid coolant system and containing a supply of liquid coolant at a higher pressure than the liquid coolant pressure in said liquid coolant system; a valve, downstream from said surge tank and positioned between said surge tank and said liquid coolant system; and, means for triggering said valve causing the liquid coolant in the surge tank to flow into said liquid coolant system in response to dynamoelectric machine overload conditions.
Claim 2
Dependent Claim
140 words
In a dynamoelectric machine including an outer casing and electrically conductive dynamoelectric machine parts contained therein having a liquid coolant distributed therethrough; said dynamoelectric machine further including a liquid coolant system for circulating the liquid coolant through said dynamoelectric machine parts; and flow surge means for providing a temporary flow surge of liquid coolant to said liquid coolant system, said flow surge means including: a surge tank, interconnected with said liquid coolant system and containing a supply of liquid coolant at a higher pressure than the liquid coolant pressure in said liquid coolant system; a valve, downstream from said surge tank and positioned between said surge tank and said liquid coolant system; and, means for triggering said valve causing the liquid coolant in the surge tank to flow into said liquid coolant system in response to dynamoelectric machine overload conditions.
Claim 3
Dependent Claim
145 words
A dynamoelectric machine of the kind having a gas-tight outer casing which is supplied with a gas coolant therein and dynamoelectric machine parts within said gas-tight outer casing having a liquid coolant distributed therethrough, said dynamoelectric machine further including a liquid coolant system for circulating the liquid coolant through the dynamoelectric machine parts; and flow surge means for providing a temporary flow surge of liquid coolant to said liquid coolant system, said flow surge means including: a surge tank, interconnected with said liquid coolant system and containing a supply of liquid coolant at a higher pressure than the liquid coolant pressure in said liquid coolant system; a valve, downstream from said surge tank and positioned between said surge tank and said liquid coolant system; and, means for triggering said valve causing the liquid coolant in the surge tank to flow into said liquid coolant system.
Claim 4
Dependent Claim
145 words
A dynamoelectric machine of the kind having a gas-tight outer casing which is supplied with a gas coolant therein and dynamoelectric machine parts within said gas-tight outer casing having a liquid coolant distributed therethrough, said dynamoelectric machine further including a liquid coolant system for circulating the liquid coolant through the dynamoelectric machine parts; and flow surge means for providing a temporary flow surge of liquid coolant to said liquid coolant system, said flow surge means including: a surge tank, interconnected with said liquid coolant system and containing a supply of liquid coolant at a higher pressure than the liquid coolant pressure in said liquid coolant system; a valve, downstream from said surge tank and positioned between said surge tank and said liquid coolant system; and, means for triggering said valve causing the liquid coolant in the surge tank to flow into said liquid coolant system.
Claim 5
Dependent Claim
22 words
The dynamoelectric machine as recited in claim 2 wherein the means for triggering said valve is responsive to dynamoelectric machine overload conditions.
Claim 6
Dependent Claim
18 words
The dynamoelectric machine as recited in claim 2 wherein teh means for triggering said valve is temperature responsive.
Claim 7
Dependent Claim
16 words
The dynamoelectric machine as recited in claim 4 wherein the temperature responsive means includes a thermocouple.
Claim 8
Dependent Claim
21 words
The dynamoelectric machine as recited in claim 2 wherein the means for triggering said valve is electrically responsive to armature current.
Claim 9
Dependent Claim
18 words
The dynamoelectric machine as recited in claim 2 wherein the means for triggering said valve is a timer.
Claim 10
Dependent Claim
14 words
The dynamoelectric machine as recited in claim 2 wherein the gas coolant is hydrogen.
Claim 11
Dependent Claim
14 words
The dynamoelectric machine as recited in claim 2 wherein the liquid coolant is water.
Claim 12
Dependent Claim
35 words
The dynamoelectric machine as recited in claim 2 wherein the liquid coolant system includes a storage tank, a pump, a heat exchanger and a check valve in series relationship with the liquid-cooled dynamoelectric machine parts.
Claim 13
Dependent Claim
34 words
The dynamoelectric machine as recited in claim 10 wherein the flow surge means is interconnected with the liquid coolant system between the check valve and the inlet end of the liquid-cooled dynamoeLectric machine parts.
Claim 14
Dependent Claim
50 words
The dynamoelectric machine as recited in claim 2 wherein the highest pressure in the liquid coolant system, within the dynamoelectric machine, is less than the lowest pressure in the gas coolant system for steady-state operation whereby any leakage which occurs will be of gas coolant into the liquid coolant system.
Claim 15
Dependent Claim
28 words
The dynamoelectric machine as recited in claim 12 wherein any gas leakage will be detected by a gas monitor and detection device connected to said liquid coolant system.
Claim 16
Dependent Claim
15 words
The dynamoelectric machine as recited in claim 2 wherein the liquid-cooled parts include armature windings.
Claim 17
Dependent Claim
16 words
The dynamoelectric machine as recited in claim 2 where the liquid-cooled parts are stator core elements.
Claim 18
Dependent Claim
35 words
The dynamoelectric machine as recited in claim 2 wherein the flow surge means further includes an auxiliary pump and a valve interconnected with said liquid coolant system on the upstream side of said surge tank.
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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) | 1976-08-27 | 1977-02-26 | 1977-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-27 | 1981-02-26 | 1981-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-27 | 1985-02-26 | 1985-08-28 | $7700.00 | Window Closed / Lapsed |