CN1205727C - Evaporation cooled device for stator of steam turbo-generator and hydraulic generator - Google Patents
Evaporation cooled device for stator of steam turbo-generator and hydraulic generator Download PDFInfo
- Publication number
- CN1205727C CN1205727C CN 02122112 CN02122112A CN1205727C CN 1205727 C CN1205727 C CN 1205727C CN 02122112 CN02122112 CN 02122112 CN 02122112 A CN02122112 A CN 02122112A CN 1205727 C CN1205727 C CN 1205727C
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- condenser
- evaporation
- cooling chamber
- evaporative cooling
- generator
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Abstract
The present invention relates to an evaporation cooling device for the stators of steam turbine generators and hydraulic generators, which belongs to a generator cooling technique. The evaporation cooling device comprises an evaporation cooling chamber and a condenser, wherein a heating body in the stator of a generator is dipped in a cooling medium by the evaporation cooling chamber; the condenser is arranged above the evaporation cooling chamber and carries out heat exchange with the steam of the cooling medium; the bottom of the condenser is communicated with an evaporation space on the upper part of the evaporation cooling chamber through a one-way valve; a liquid return tank is arranged in the same horizontal position near the condenser; a communicating pipe is connected between the bottom of the condenser and the bottom of the return liquid tank; a return liquid pipe which is connected with the one-way valve and an electromagnetic valve is connected with the evaporation space of the evaporation cooling chamber at a certain liquid storage height; a water leakage detector, a pressure controller and an air escape valve are arranged on the condenser. The present invention can effectively prevents the short circuit failure of the generator caused by leaky cooling water from the condenser to be mixed with the evaporation cooling chamber where the electrified heating body of the generator is dipped so as to enhance the safety and the reliability of the evaporation cooling device.
Description
Technical field
The invention belongs to the motor cooling technology, relate to the evaporation-cooled device of steamer and hydraulic generator stator.
Background technology
High-rating generator comprises turbo generator and hydraulic generator (being called for short motor herein), adopts evaporation cooling technique to have good cooling results, advantage such as safe and reliable to operation than air cooling, water-cooled, hydrogen-cooled unit commonly used.The evaporative cooling of generator unit stator is that the heat generating components of motor stator is immersed in the liquid cooling medium, or liquid cooling medium is poured in the hollow conductor chamber of motor stator winding, utilizes the principle of liquid cooling medium vaporization heat absorption to come the cooling motor stator.The evaporative cooling medium of selecting for use, its boiling point are wanted to satisfy the electric machine temperature rise requirement, generally should be in 40～70 degree Celsius.Also need to have high insulation, feature safe, nontoxic, no chemical breakdown under the motor service conditions in addition.
In the motor stator evaporation-cooled device, condenser is to take away the heat that motor stator heat generating components (comprising generator unit stator winding, iron core and fixed part thereof etc.) produces, and makes motor temperature remain on the main heat exchanger of design margin.Chinese invention patent application 01131399.4 and 01131397.8 is exactly the example of this evaporation-cooled device.In above-mentioned evaporation-cooled device, though condenser can satisfy the required heat exchange requirement of evaporative cooling motor stator cooling, but because the evaporating space at condenser and the charged heater of motor stator place is directly to be communicated with, in case the cooling water pipe in the condenser leaks, secondary cooling water might enter in the coolant that directly contacts with charged heater immediately, causes short circuit accident.Even warning is arranged, in case but cooling water pipe generation leakage also is difficult to avoid accident.This shows that the defective of the evaporation-cooled device of prior art needs improvement and perfect, thereby further improves its security reliability.
Summary of the invention
The purpose of this invention is to provide a kind of steamer and hydraulic generator stator evaporation-cooled device, improved condenser in the device and soaked connectivity structure between the evaporative cooling chamber of motor stator heat generating components, avoided leaking the generator short circuit accident that causes because of secondary cooling water in the condenser.
Steamer of the present invention and hydraulic generator stator evaporation-cooled device, comprise that soaking the motor stator heater implements the evaporative cooling chamber of cooling to it, the top of evaporative cooling chamber is evaporating space, the bottom is injected high insulation and is had the liquid cooling medium of suitable boiling point, and a condenser that carries out heat exchange with the coolant steam is contained in the top of evaporative cooling chamber.Be communicated with by the first unidirectional valve group between the evaporating space of condenser bottom and evaporative cooling chamber, the circulating direction of the first unidirectional valve group is the top condensation space that flows to condenser from evaporative cooling chamber.Be that steam in the evaporative cooling chamber can flow to condenser by the first unidirectional valve group, and the coolant liquid in the condenser can not directly flow back to evaporative cooling chamber.The main body of condenser comprises the condensing container that fills liquid cooling medium.The cooling water pipe of circulation secondary cooling water is contained in the condensing container, and the water side and the water inlet end of cooling water pipe are drawn from condenser.The top of condenser is condensation space.The detector that leaks, pressure controller and vent valve are housed, the pressure that is used to monitor the leakage of secondary cooling water and regulates the condenser condenses space on the condenser.
The evaporative cooling chamber top, the same horizontal level contiguous with condenser is provided with a liquid-return box, there is communicating pipe to be connected between liquid-return box bottom position and the condenser, on the liquid storage height of setting, is connected with the evaporating space of evaporative cooling chamber by the pipeline that second unidirectional valve is housed and returns liquid electromagnetic valve.
In the evaporation-cooled device of the present invention, evaporative cooling medium is selected perfluoro triethylamine for use, and its molecular formula is (C
2F
5)
2N; Perhaps with picking up amyl fluoride, its molecular formula is C
5H
2F
10Their proportion is greater than 1.5 and be not dissolved in water, depresses at a standard atmosphere, and boiling point is respectively 69 degree Celsius and 55 degree.They all have high insulation, suitable boiling point, safety non-toxic, and the characteristics that chemical property is stable, and do not destroy atmospheric ozone layer, meet environmental protection requirement.
During apparatus of the present invention operation, the motor stator live part that is immersed in the evaporative cooling chamber generates heat because of loss, make liquid cooling medium be evaporated to gas, absorb heat in phase transition process, the coolant steam carries out heat exchange, is condensed into liquid and converges in the fluid reservoir of condenser by the cooling pipe that the first unidirectional valve group enters condenser and circulation secondary cooling water.The fluid reservoir bottom has communicating pipe to be communicated with liquid-return box.After the coolant liquid level in the liquid-return box surpasses setting height, there is the pipeline of the electromagnetically operated valve and second unidirectional valve to pass back into evaporative cooling chamber by liquid-return box one side joint.
Evaporation-cooled device of the present invention, because the isolation of the first unidirectional valve group, liquid cooling medium in the condenser fluid reservoir can not flow directly in the evaporative cooling chamber, when in a single day the cooling water pipe in the condenser takes place to leak, because the proportion of used coolant is greater than water, so the secondary cooling water that spills will float over the coolant surface, can not enter the evaporative cooling chamber that soaks the charged heat generating components of motor stator immediately.At this moment the detector action of leaking on the condenser is closed back liquid electromagnetic valve, thereby has been avoided causing the short circuit accident of electric equipment because of condenser leaks, and has created advantageous conditions for shutting down maintenance.Working as condenser in addition raises because of the air that bleeds causes condenser pressure, when influencing cooling effect, the pressure controller on the condenser will be opened the electromagnetically operated valve venting, make condenser return to service pressure, this shows that evaporation-cooled device of the present invention has improved security reliability.
Description of drawings
Fig. 1 is the schematic diagram of steamer of the present invention and hydraulic generator stator evaporation-cooled device.
Embodiment
Fig. 1 is an embodiment of evaporation-cooled device of the present invention.Generator unit stator heat generating components 20 is immersed in the liquid cooling medium 11 of evaporative cooling chamber 10 bottoms.The top of evaporative cooling chamber 10 is evaporating spaces 13.The condenser 30 that is positioned at evaporative cooling chamber 10 tops is isolated with the former, and the first unidirectional valve group 15 that dress is made up of a plurality of unidirectional valves between the bottom of evaporating space 13 and condenser 30.The top of condenser 30 is condensation spaces 33, and the bottom is a fluid reservoir 31.15 of the first unidirectional valve groups allow the coolant steam in the evaporating space 13 to enter in the condenser 30 through it.In the condensation space 33 of condenser cooling water pipe 32 is housed, secondary cooling water circulates in the cooling water pipe 32.The detector 38 that leaks is equipped with at the top of condenser 30, pressure controller 36.It is the electric contact pressure vacuum meter of XZY-150 that pressure controller 36 is selected model for use, its function has pressure demonstration, upper pressure limit and low pressure limit to set, above-mentioned each function of this electric contact pressure vacuum meter all has corresponding connection, breaks electrical contacts separately, in order to the opening and closing of control electromagnetically operated valve.The electromagnetically operated valve of selecting suitable bore for use is as vent valve 35.The detector 38 that leaks can select for use Chinese invention patent application 01131399.4 to provide, and its transducer puts in the fluid reservoir 31.
As shown in Figure 1, liquid-return box 40 is contiguous with condenser 30, and the two bottom was communicated with communicating pipe 41, and condensed liquid cooling medium is in same horizontal plane.Liquid-return box 40 1 sides by the liquid back pipe 44 of the electromagnetically operated valve 43 and second unidirectional valve 45 is housed, are connected with the evaporating space 13 of evaporative cooling chamber 10 on the coolant liquid storage face height of setting.Coolant in the liquid-return box 40 is connected with the evaporating space 13 of evaporative cooling chamber 10 through electromagnetically operated valve 43, second unidirectional valve 45 and liquid back pipe 44.Coolant in the liquid-return box 40 flows to evaporative cooling chamber 10 through electromagnetically operated valve 43, second unidirectional valve 45 and liquid back pipe 44.Coolant 11 is selected perfluoro triethylamine for use, and its molecular formula is (C
2F
5)
2N; Perhaps with picking up amyl fluoride, its molecular formula is C
5H
2F
10
Claims (5)
1, the evaporation-cooled device of a kind of steamer and hydraulic generator stator, comprise coolant is housed, and the motor stator heater is immersed in evaporative cooling chamber in the coolant, it is characterized in that a condenser that carries out heat exchange with the coolant steam is contained in the top of evaporative cooling chamber, be communicated with by the first unidirectional valve group between the evaporating space on the bottom of condenser and evaporative cooling chamber top.
2, the evaporation-cooled device of steamer according to claim 1 and hydraulic generator stator, it is characterized in that on the contiguous same horizontal level of evaporative cooling chamber top and condenser a liquid-return box being arranged, there is communicating pipe to be communicated with bottom the liquid-return box with between the condenser, on the liquid storage height of setting, is connected with the evaporating space of evaporative cooling chamber by the liquid back pipe that is connected to second unidirectional valve and electromagnetically operated valve.
3, the evaporation-cooled device of steamer according to claim 1 and hydraulic generator stator, it is characterized in that condenser is a closed container, be mounted with the cooling water pipe by secondary cooling water in the container, the bottom is the fluid reservoir that fills coolant, and top is condensation space; The circulating direction that is communicated with the first unidirectional valve group between condenser bottom and the evaporative cooling chamber evaporating space is the top condensation space that flows to condenser from evaporative cooling chamber.
4, the evaporation-cooled device of steamer according to claim 1 and hydraulic generator stator is characterized in that being equipped with on the condenser detector that leaks, pressure controller and vent valve.
5, the evaporation-cooled device of steamer according to claim 1 and hydraulic generator stator is characterized in that the evaporative cooling coolant adopts perfluoro triethylamine, and its molecular formula is (C
2F
5)
2N; Or pick up amyl fluoride, its molecular formula is C
5H
2F
10, their proportion is not dissolved in water greater than 1.5, depresses at a standard atmosphere, and boiling point is respectively 69 degree Celsius and 55 degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02122112 CN1205727C (en) | 2002-05-30 | 2002-05-30 | Evaporation cooled device for stator of steam turbo-generator and hydraulic generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02122112 CN1205727C (en) | 2002-05-30 | 2002-05-30 | Evaporation cooled device for stator of steam turbo-generator and hydraulic generator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1463067A CN1463067A (en) | 2003-12-24 |
| CN1205727C true CN1205727C (en) | 2005-06-08 |
Family
ID=29743142
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02122112 Expired - Fee Related CN1205727C (en) | 2002-05-30 | 2002-05-30 | Evaporation cooled device for stator of steam turbo-generator and hydraulic generator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1205727C (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101615331B (en) * | 2008-06-26 | 2011-04-20 | 上海梅山钢铁股份有限公司 | Water leakage alarm device for generator |
| CN101787950A (en) * | 2010-02-08 | 2010-07-28 | 中国科学院电工研究所 | Evaporative cooling wind power water-pumping energy storage co-generation system |
| CN102510172A (en) * | 2011-11-21 | 2012-06-20 | 哈尔滨电机厂有限责任公司 | Secondary cooling system for hydraulic generator |
| CN103683669A (en) * | 2012-09-13 | 2014-03-26 | 泰豪沈阳电机有限公司 | Water collecting device for cooler of large-power upper water-cooled machine |
| CN104979960A (en) * | 2015-07-14 | 2015-10-14 | 国家电网公司 | External evaporation-type cooling system for generator motor |
| CN105939078A (en) * | 2016-05-18 | 2016-09-14 | 哈尔滨电机厂有限责任公司 | Dew collection and leakage prevention device of generator air cooler |
| CN111162640A (en) * | 2019-10-15 | 2020-05-15 | 李居强 | Motor stator heat radiation structure |
-
2002
- 2002-05-30 CN CN 02122112 patent/CN1205727C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1463067A (en) | 2003-12-24 |
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| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Guodian United Power Technology (Baoding) Co., Ltd. Assignor: Institute of Electrical Engineering of the Chinese Academy of Sciences Contract fulfillment period: 2008.11.14 to 2013.11.13 Contract record no.: 2008990001236 Denomination of invention: Evaporation cooled device for stator of steam turbo-generator and hydraulic generator Granted publication date: 20050608 License type: Exclusive license Record date: 20081119 |
|
| LIC | Patent licence contract for exploitation submitted for record |
Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2008.11.14 TO 2013.11.13; CHANGE OF CONTRACT Name of requester: STATE ELECTRIC UNITED POWER TECHNOLOGY (BAODING) C Effective date: 20081119 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20050608 Termination date: 20190530 |
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| CF01 | Termination of patent right due to non-payment of annual fee |