CN102064636A - Steam turbine generator with stator multiloop reciprocating ventilation system - Google Patents
Steam turbine generator with stator multiloop reciprocating ventilation system Download PDFInfo
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- CN102064636A CN102064636A CN 201110005624 CN201110005624A CN102064636A CN 102064636 A CN102064636 A CN 102064636A CN 201110005624 CN201110005624 CN 201110005624 CN 201110005624 A CN201110005624 A CN 201110005624A CN 102064636 A CN102064636 A CN 102064636A
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Abstract
The invention relates to a steam turbine generator with a stator multiloop reciprocating ventilation system, belonging to the technical field of cooling of large air-cooled steam turbine generators. The invention solves the problem that the axial temperature distribution of the stator of the traditional large steam turbine generator is not uniform. According to the invention, an axial partition plate is used for dividing a ventilation region into a cold wind cavity and a hot wind cavity, and a toothspace radial partition plate is used for dividing a ventilating duct into stator cold wind areas and stator hot wind areas; each stator cold wind area is equally divided into two cold wind sections by one radial partition plate in the cold wind area along the peripheral direction, and each stator hot wind area is equally divided into two hot wind sections by one radial partition plate in the hot wind area along the peripheral direction; each cold wind section and adjacent hot wind sections form a U-slot airflow path, and all U-slot airflow paths form the stator multiloop reciprocating ventilation system. The stator multiloop reciprocating ventilation system is applicable to the cooling of the steam turbine generator.
Description
Technical field
The present invention relates to a kind of turbo generator, belong to large air-cooled turbine generator cooling technology field with the reciprocating type ventilating system of stator multiloop.
Background technology
Along with the raising of large turbo-type generator capacity, the line current of motor load increases thereupon, and line current increases the motor internal loss increase that causes and caused the temperature rise of motor too high then, has a strong impact on the safe and stable operation of motor.The heating of stator winding coil has become the main determining factor that the indirect gas cooled turbo generator capacity of restriction improves, at present, the following turbo generator of 600MW mainly adopts the mode of forced ventilation cooling to cool off indirectly, and the increase of capacity motor requires to adopt most economical air quantity to come the most effective heat that motor internal is produced to distribute.
At present, large turbo-type generator adopts the DLT wind system to dispel the heat, and its stator core has the radial ventilation ditch, cold and hot wind district arranged alternate on stator shaft orientation.Refrigerating gas at first enters the cold wind district from the stator yoke back, cools off stator core yoke portion successively, stator winding and stator teeth, discharge from the stator inner circle then, with enter the hot blast district after gas that cooled rotor comes out from the rotor air outlet mixes, discharge from the stator cylindrical at last, enter cooler.The shortcoming of the type ventilation cooling system is: motor temperature distributing disproportionation in the axial direction is even, and the temperature of hot blast district part obviously will be higher than the temperature of cold wind district part.
Summary of the invention
The present invention is in order to strengthen the heat-transfer capability between large turbo-type generator stator teeth and the stator winding, to solve the even problem of stator shaft orientation temperature distributing disproportionation, a kind of turbo generator with the reciprocating type ventilating system of stator multiloop being provided.
The present invention includes casing, stator and rotor, is plenum area between the internal circular surfaces of casing and the outer round surface of stator, is air gap between the internal circular surfaces of stator and the outer round surface of rotor,
Stator is made up of the multistage stator core of spaced set, and described multistage stator core is arranged along rotor axial, forms a radial ventilation ditch between every adjacent two sections stator cores,
Along the circumferential direction be provided with n stator tooth on the internal circular surfaces of every section stator core, n is the integer between the 50-80,
It also comprises axially dividing plate of 2n, is provided with radially dividing plate, n cold wind district dividing plate and n hot blast district dividing plate radially radially of 2n between cog in each radial ventilation ditch,
2n axial dividing plate along the circumferential direction is divided into 2n air chamber with described plenum area, and 2n air chamber is divided into n cold wind chamber and n hot blast chamber, the alternate setting in cold wind chamber with the hot blast chamber, and the central lines of the radial centre lines in each cold wind chamber and a stator tooth,
Each radial ventilation ditch by 2n between cog radially dividing plate along the circumferential direction be divided into 2n stator wind district, this 2n stator wind district is corresponding one by one with a described 2n air chamber, what communicate with the cold wind chamber in this 2n stator wind district is stator cold wind district, and what communicate with the hot blast chamber is stator hot blast district
Each stator cold wind district by a cold wind district radially dividing plate along the circumferential direction evenly be divided into two cold wind sections, each stator hot blast district by a hot blast district radially dividing plate along the circumferential direction evenly be divided into two hot blast sections, each cold wind section and adjacent hot blast section formation U-lag current path
All described U-lag current paths are formed the reciprocating type ventilating system of stator multiloop.
Advantage of the present invention is: the present invention is by radially radially dividing plate and the radially setting of dividing plate of hot blast district of dividing plate, cold wind district of between cog, the U-lag current path that forms, can effectively reduce the fluid vortex loss in the stator radial ventilation ditch, strengthen the ventilation cooling effect of turbo generator, effectively reduced the temperature difference of stator shaft orientation, made the circumferencial direction Temperature Distribution of stator more even simultaneously.The reciprocating type ventilating system of stator multiloop of the present invention can improve the heat-sinking capability of stator teeth, strengthens the heat-transfer capability between stator teeth and the stator winding, and then has reduced the maximum temperature of stator winding coil.
Description of drawings
Fig. 1 is an axial cutaway view of the present invention;
Fig. 2 is the circumferencial direction partial sectional view of execution mode one described stator of steam turbine generator, and arrow is depicted as the airflow direction in the U-lag current path among the figure;
Fig. 3 is the circumferencial direction partial sectional view of execution mode two described stator of steam turbine generator, and arrow is depicted as the airflow direction in the U-lag current path among the figure.
Embodiment
Embodiment one: present embodiment is described below in conjunction with Fig. 1 and Fig. 2, present embodiment comprises casing 1, stator 2 and rotor 3, being plenum area between the outer round surface of the internal circular surfaces of casing 1 and stator 2, is air gap 4 between the outer round surface of the internal circular surfaces of stator 2 and rotor 3
Stator 2 is made up of the multistage stator core 2-1 of spaced set, and described multistage stator core 2-1 forms a radial ventilation ditch 5 along rotor 3 axially-aligned between every adjacent two sections stator core 2-1,
Along the circumferential direction be provided with n stator tooth 2-11 on the internal circular surfaces of every section stator core 2-1, n is the integer between the 50-80,
It also comprises axially dividing plate 8 of 2n, is provided with radially dividing plate 9-1, n cold wind district dividing plate 9-2 and n hot blast district dividing plate 9-3 radially radially of 2n between cog in each radial ventilation ditch 5,
2n axial dividing plate 8 along the circumferential direction is divided into 2n air chamber with described plenum area, 2n air chamber is divided into n cold wind chamber 10-1 and n hot blast chamber 10-2, cold wind chamber 10-1 and the alternate setting of hot blast chamber 10-2, the radial centre lines of each cold wind chamber 10-1 and the central lines of a stator tooth 2-11
Each radial ventilation ditch 5 by 2n between cog radially dividing plate 9-1 along the circumferential direction be divided into 2n stator wind district, this 2n stator wind district is corresponding one by one with a described 2n air chamber, what communicate with cold wind chamber 10-1 in this 2n stator wind district is stator cold wind district, what communicate with hot blast chamber 10-2 is stator hot blast district
Each stator cold wind district by a cold wind district radially dividing plate 9-2 along the circumferential direction evenly be divided into two cold wind section 2-12, each stator hot blast district by a hot blast district radially dividing plate 9-3 along the circumferential direction evenly be divided into two hot blast section 2-13, each cold wind section 2-12 and adjacent hot blast section 2-13 formation U-lag current path
All described U-lag current paths are formed the reciprocating type ventilating system of stator multiloop.
In radial ventilation ditch 5, by between cog dividing plate 9-1 radially, the cold wind district is dividing plate 9-2 and the radially setting of dividing plate 9-3 of hot blast district radially, formed the U-lag current path, described U-lag current path one side communicates with plenum area, opposite side communicates with air gap 4, U-lag current path quantity between every two neighboring sections stator core 2-1 is 2n, cold wind chamber 10-1 and the alternate setting of hot blast chamber 10-2, can make refrigerating gas enter radial ventilation ditch 5 from cold wind chamber 10-1, refrigerating gas enters from the cold wind section 2-12 of radial ventilation ditch 5, cool off stator core yoke portion and stator tooth 2-11 portion successively, go out from stator 2 interior circle effluents then, after the gas of air gap 4 mixes, flow to the hot blast section 2-13 adjacent with this cold wind section 2-12, cooling hot blast section 2-13 returns the hot blast chamber 10-2 that communicates with this hot blast section 2-13, loops back cooler by hot blast chamber 10-2 air outlet.Described hot blast district radially being provided with of dividing plate 9-3 is beneficial to the bottom land zone generation fluid swirling of reduction cooling fluid at the U-lag current path.
Embodiment two: below in conjunction with Fig. 2 and Fig. 3 present embodiment is described, present embodiment is the further qualification to execution mode one, and described between cog radially dividing plate 9-1 is shorter than radially dividing plate 9-2 of cold wind district.Other composition and annexation are identical with execution mode one.
In the present embodiment cold wind district radially dividing plate 9-2 be longer than the radially length of dividing plate 9-1 radial direction of between cog along the length of stator core 2-1 radial direction, therefore can form the air-flow U-shaped path of cold wind section 2-12 to hot blast section 2-13 circulation.
Embodiment three: below in conjunction with Fig. 1 and Fig. 3 present embodiment is described, the difference of present embodiment and execution mode two is that it also comprises the tangential dividing plate 11 in cold wind district of n rectangle,
Each the cold wind district radially air gap side end face of dividing plate 9-2 is connected with the line of symmetry fixed-site of a tangential dividing plate 11 in cold wind district, and the tangential dividing plate 11 in this cold wind district is perpendicular to connected cold wind district dividing plate 9-2 radially, tangential dividing plate 11 clampings in each cold wind district make each cold wind section 2-12 and adjacent hot blast section 2-13 formation U-lag current path between two axially adjacent stator tooth 2-11.Other composition and annexation are identical with execution mode two.
Adopt the tangential dividing plate 11 in cold wind district that the path of U-lag current path and air gap 4 is carried out the part blocking-up in the present embodiment, help refrigerating gas after cold wind section 2-12 finishes the cooling of stator core yoke portion and stator tooth 2-11 portion, directly enter into the hot blast section 2-13 adjacent with this cold wind section 2-12, and the air mixed that no longer enters air gap 4 and air gap 4 places, what the gas that can effectively reduce air gap 4 places entered that hot blast section 2-13 causes enters the resistance of hot blast section 2-13 to cold wind section 2-12 exit air-flow.
Embodiment four: present embodiment is described below in conjunction with Fig. 3, present embodiment is the further qualification to execution mode three, the tangential dividing plate 11 in each cold wind district length along the circumferential direction less than two between cog adjacent with the tangential dividing plate in this cold wind district 11 radially between the dividing plate 9-1 air gap side end apart from d, and greater than 1/2d.Other composition and annexation are identical with execution mode three.
Adopt the tangential dividing plate 11 in cold wind district, under the constant situation of cold wind section 2-12 inlet air quantity, can reduce the area of cold wind section 2-12 outlet, increase the wind speed in exit, effectively reduce the temperature at place, stator tooth 2-11 top.The gas that the tangential dividing plate 11 in cold wind district can effectively reduce the rotor airgap place flows into the resistance of hot blast section 2-13 to cold wind section 2-12 exit gas, prevents that gas from recharging the generation of phenomenon in cold wind section 2-12 porch.
Embodiment five: below in conjunction with Fig. 1 to Fig. 3 present embodiment is described, present embodiment is for to the further specifying of execution mode one, two, three or four, and it also comprises stator winding 6 and stator slot wedge 7,
Be wound with stator winding 6 on n the stator tooth 2-11, described stator winding 6 is fixing by stator slot wedge 7.Other composition and annexation are identical with execution mode one, two, three or four.
Described stator winding 6 embeds in the groove of stator tooth 2-11, stator winding 6 and stator slot wedge 7 run through stator 2 whole axially, the hot blast district radially on position and each stator tooth 2-11 of dividing plate 9-3 the position at stator winding 6 centers corresponding diametrically.
Claims (5)
1. turbo generator with the reciprocating type ventilating system of stator multiloop, it comprises casing (1), stator (2) and rotor (3), be plenum area between the outer round surface of the internal circular surfaces of casing (1) and stator (2), between the outer round surface of the internal circular surfaces of stator (2) and rotor (3) air gap (4)
Stator (2) is made up of the multistage stator core (2-1) of spaced set, and described multistage stator core (2-1) forms a radial ventilation ditch (5) along rotor (3) axially-aligned between every adjacent two sections stator cores (2-1),
Along the circumferential direction be provided with n stator tooth (2-11) on the internal circular surfaces of every section stator core (2-1), n is the integer between the 50-80,
It is characterized in that: it also comprises axially dividing plate (8) of 2n, is provided with radially dividing plate (9-1), n cold wind district dividing plate (9-2) and n hot blast district dividing plate (9-3) radially radially of 2n between cog in each radial ventilation ditch (5),
2n axial dividing plate (8) along the circumferential direction is divided into 2n air chamber with described plenum area, 2n air chamber is divided into n cold wind chamber (10-1) and n hot blast chamber (10-2), cold wind chamber (10-1) and the alternate setting in hot blast chamber (10-2), the central lines of the radial centre lines in each cold wind chamber (10-1) and a stator tooth (2-11)
Each radial ventilation ditch (5) by 2n between cog radially dividing plate (9-1) along the circumferential direction be divided into 2n stator wind district, this 2n stator wind district is corresponding one by one with a described 2n air chamber, what communicate with cold wind chamber (10-1) in this 2n stator wind district is stator cold wind district, what communicate with hot blast chamber (10-2) is stator hot blast district
Each stator cold wind district by a cold wind district radially dividing plate (9-2) along the circumferential direction evenly be divided into two cold wind sections (2-12), each stator hot blast district by a hot blast district radially dividing plate (9-3) along the circumferential direction evenly be divided into two hot blast sections (2-13), each cold wind section (2-12) and adjacent hot blast section (2-13) formation U-lag current path
All described U-lag current paths are formed the reciprocating type ventilating system of stator multiloop.
2. the turbo generator with the reciprocating type ventilating system of stator multiloop according to claim 1 is characterized in that: described between cog radially dividing plate (9-1) is shorter than radially dividing plate (9-2) of cold wind district.
3. the turbo generator with the reciprocating type ventilating system of stator multiloop according to claim 2 is characterized in that: it also comprises the tangential dividing plate in cold wind district (11) of n rectangle,
Each the cold wind district radially air gap side end face of dividing plate (9-2) is connected with the line of symmetry fixed-site of a tangential dividing plate in cold wind district (11), and the tangential dividing plate in this cold wind district (11) is perpendicular to connected cold wind district dividing plate (9-2) radially, the tangential dividing plate in each cold wind district (11) clamping makes each cold wind section (2-12) and adjacent hot blast section (2-13) formation U-lag current path between axially adjacent two stator tooths (2-11).
4. the turbo generator with the reciprocating type ventilating system of stator multiloop according to claim 3, it is characterized in that: the tangential dividing plate in each cold wind district (11) length along the circumferential direction less than two between cog adjacent with the tangential dividing plate in this cold wind district (11) radially between dividing plate (9-1) the air gap side end apart from d, and greater than 1/2d.
5. according to claim 1,2,3 or 4 described turbo generators with the reciprocating type ventilating system of stator multiloop, it is characterized in that: it also comprises stator winding (6) and stator slot wedge (7),
Be wound with stator winding (6) on n the stator tooth (2-11), described stator winding (6) is fixing by stator slot wedge (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100056249A CN102064636B (en) | 2011-01-12 | 2011-01-12 | Steam turbine generator with stator multiloop reciprocating ventilation system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100056249A CN102064636B (en) | 2011-01-12 | 2011-01-12 | Steam turbine generator with stator multiloop reciprocating ventilation system |
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| Publication Number | Publication Date |
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| CN102064636A true CN102064636A (en) | 2011-05-18 |
| CN102064636B CN102064636B (en) | 2012-07-25 |
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| CN2011100056249A Active CN102064636B (en) | 2011-01-12 | 2011-01-12 | Steam turbine generator with stator multiloop reciprocating ventilation system |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102332780A (en) * | 2011-09-30 | 2012-01-25 | 东方电气集团东方电机有限公司 | Wind driven generator |
| CN103066727A (en) * | 2012-09-06 | 2013-04-24 | 哈尔滨工业大学 | Novel motor cooling and eddy-current confinement structure |
| CN105762955A (en) * | 2016-05-11 | 2016-07-13 | 哈尔滨理工大学 | Hoop winding coil groove-type hydraulic generator stator facilitating heat dissipation |
| CN105990944A (en) * | 2015-02-09 | 2016-10-05 | 山东齐鲁电机制造有限公司 | Wind path structure of air-cooling steam turbine generator |
| WO2018054224A1 (en) * | 2016-09-20 | 2018-03-29 | 北京交通大学 | Honeycomb-type closed ventilation and cooling device for motor |
| CN110429746A (en) * | 2019-08-30 | 2019-11-08 | 东方电气集团东方电机有限公司 | A kind of device with reduction major diameter electrical-coil and the iron core circumferential direction temperature difference |
| CN110429747A (en) * | 2019-08-30 | 2019-11-08 | 东方电气集团东方电机有限公司 | A method of reducing electrical-coil and the iron core circumferential direction temperature difference |
| CN110635588A (en) * | 2018-08-31 | 2019-12-31 | 北京金风科创风电设备有限公司 | Iron-core medium transporting and heat exchanging device in electromagnetic device and eddy current separator |
| CN112311126A (en) * | 2020-09-21 | 2021-02-02 | 江苏大学 | Motor cooling structure |
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Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102332780B (en) * | 2011-09-30 | 2013-06-19 | 东方电气集团东方电机有限公司 | Wind driven generator |
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| CN103066727A (en) * | 2012-09-06 | 2013-04-24 | 哈尔滨工业大学 | Novel motor cooling and eddy-current confinement structure |
| CN103066727B (en) * | 2012-09-06 | 2015-06-03 | 哈尔滨工业大学 | Novel motor cooling and eddy-current confinement structure |
| CN105990944B (en) * | 2015-02-09 | 2018-06-26 | 山东齐鲁电机制造有限公司 | A kind of air-cooled steam turbine generator wind path structure |
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| CN105762955A (en) * | 2016-05-11 | 2016-07-13 | 哈尔滨理工大学 | Hoop winding coil groove-type hydraulic generator stator facilitating heat dissipation |
| CN105762955B (en) * | 2016-05-11 | 2018-01-23 | 哈尔滨理工大学 | A kind of circular winding groove type hydraulic generator stator for being beneficial to radiating |
| WO2018054224A1 (en) * | 2016-09-20 | 2018-03-29 | 北京交通大学 | Honeycomb-type closed ventilation and cooling device for motor |
| CN110635588A (en) * | 2018-08-31 | 2019-12-31 | 北京金风科创风电设备有限公司 | Iron-core medium transporting and heat exchanging device in electromagnetic device and eddy current separator |
| CN110635588B (en) * | 2018-08-31 | 2020-08-11 | 北京金风科创风电设备有限公司 | Iron-core medium transporting and heat exchanging device in electromagnetic device and eddy current separator |
| CN110429746A (en) * | 2019-08-30 | 2019-11-08 | 东方电气集团东方电机有限公司 | A kind of device with reduction major diameter electrical-coil and the iron core circumferential direction temperature difference |
| CN110429747A (en) * | 2019-08-30 | 2019-11-08 | 东方电气集团东方电机有限公司 | A method of reducing electrical-coil and the iron core circumferential direction temperature difference |
| CN110429747B (en) * | 2019-08-30 | 2020-11-20 | 东方电气集团东方电机有限公司 | Method for reducing circumferential temperature difference between motor coil and iron core |
| CN110429746B (en) * | 2019-08-30 | 2020-11-20 | 东方电气集团东方电机有限公司 | Device capable of reducing circumferential temperature difference between large-diameter motor coil and iron core |
| CN112311126A (en) * | 2020-09-21 | 2021-02-02 | 江苏大学 | Motor cooling structure |
| CN112311126B (en) * | 2020-09-21 | 2021-10-08 | 江苏大学 | Motor cooling structure |
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| CN102064636B (en) | 2012-07-25 |
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Inventor after: Li Weili Inventor after: Luo Yingli Inventor after: Jiao Xiaoxia Inventor after: Zhang Yihuang Inventor after: Huo Feiyang Inventor after: Guan Chunwei Inventor before: Li Weili Inventor before: Huo Feiyang Inventor before: Guan Chunwei |
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Free format text: CORRECT: INVENTOR; FROM: LI WEILI HUO FEIYANG GUAN CHUNWEI TO: LI WEILI LUO YINGLI JIAO XIAOXIA ZHANG YIHUANG HUO FEIYANG GUAN CHUNWEI |
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