CN212676971U - Direct-cooling generator stator core front-mounted ventilation slot plate structure - Google Patents
Direct-cooling generator stator core front-mounted ventilation slot plate structure Download PDFInfo
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- CN212676971U CN212676971U CN202021221642.1U CN202021221642U CN212676971U CN 212676971 U CN212676971 U CN 212676971U CN 202021221642 U CN202021221642 U CN 202021221642U CN 212676971 U CN212676971 U CN 212676971U
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Abstract
The utility model discloses a direct cooling generator stator core front-mounted ventilation slot plate structure, which comprises a stator core, a slot bottom plate and a tooth pressing sheet, wherein the stator core comprises a circular arc-shaped main body part and a tooth-shaped part positioned in the inner circle of the main body part, the tooth-shaped part is circumferentially distributed along the axis of the main body part, and a tooth-shaped slot is formed between the tooth-shaped parts; the groove bottom plate is fixed on the main body part, the tooth pressing piece is fixed with the groove bottom plate, and the starting point of the tooth pressing piece is close to the inner circle of the main body part; the end point of the tooth pressing piece is close to the excircle of the main body part, and the starting point and the end point of the tooth pressing piece are connected by a smooth curve; two adjacent tooth pressing sheets form a ventilation groove, and the starting point of the ventilation groove is positioned at the front end of the tooth groove in the rotation direction of the generator. The utility model provides a direct-cooled generator stator forward type ventilation slotted plate structure unshakable in one's determination, the space between the adjacent winding of stator circumference is opened completely, guarantees the biggest ventilation sectional area, improves circulation wind speed, strengthens air current heat exchange efficiency, and the cooling effect is good.
Description
Technical Field
The utility model belongs to the technical field of direct cooling generator and specifically relates to a direct cooling generator stator core forward type ventilation slot plate structure is related to.
Background
The installed capacity of a generator is usually limited by the temperature rise of the windings, so the ventilation and heat dissipation system directly determines the economic benefit of the generator. In order to enhance the heat dissipation effect of the stator winding, the stator core of the direct-cooling generator on the market at present is usually in a multi-section type, and the middle of the stator core is separated by a ventilation slot plate. The ventilation slot plate consists of a tooth pressing sheet and a slot bottom plate, the tooth pressing sheet is vertically spot-welded on the slot bottom plate, and the axis of the tooth pressing sheet is superposed with the central line of the tooth part. The rotor is similarly constructed. When the generator rotates, the airflow in the rotor ventilation groove rotates; meanwhile, due to the action of centrifugal wind pressure generated by the rotation motion, air flow flows from the rotor ventilating slot to the stator ventilating slot. The stator ventilation slot has reduced the cross-sectional area in ventilation slot owing to the existence of tooth preforming, hinders the radial air current that the generator rotation arouses and passes through, has reduced cooling cycle wind speed to reduce surface heat exchange efficiency, it is unfavorable to the heat dissipation of motor stator core and winding. In order to further optimize the heat dissipation of the motor and reduce the temperature rise of the stator winding, the structure of the motor ventilation slot plate needs to be improved to solve the problem.
Chinese patent application publication No. CN202798185U, published as 2013, 03, 13, entitled "a wind turbine stator and wind turbine", discloses a wind turbine stator and wind turbine, which includes a yoke, a tooth portion provided on the yoke for enhancing magnetic conductance; a circular bottom groove arranged between the adjacent tooth parts and used for storing the coil wound on the tooth parts and changing the winding direction of the coil; and the positioning groove is arranged on the outer circle of the stator and used for fixing the position of the stator of the wind driven generator. The generator still has the above-mentioned problems.
Disclosure of Invention
The utility model discloses an overcome among the prior art tooth preforming and reduced the cross-sectional area in ventilation groove, reduced the cooling cycle wind speed to reduced surface heat exchange efficiency's problem, provide a direct-cooled generator stator core forward type ventilation groove plate structure, the space between the adjacent winding of stator circumference is opened completely, guarantees the biggest ventilation sectional area, improves circulation wind speed, strengthens air current heat exchange efficiency, and the cooling effect is good.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a front ventilation slot plate structure of a stator core of a direct cooling generator comprises the stator core, a slot bottom plate and a tooth pressing piece, wherein the stator core comprises a circular arc-shaped main body part and tooth-shaped parts positioned in the inner circle of the main body part, the tooth-shaped parts are circumferentially distributed along the axis of the main body part, and tooth-shaped slots are formed among the tooth-shaped parts; the groove bottom plate is fixed on the main body part, the tooth pressing piece is fixed with the groove bottom plate, and the starting point of the tooth pressing piece is close to the inner circle of the main body part; the end point of the tooth pressing piece is close to the excircle of the main body part, and the starting point and the end point of the tooth pressing piece are connected by a smooth curve; two adjacent tooth pressing sheets form a ventilation groove, and the starting point of the ventilation groove is positioned at the front end of the tooth groove in the rotation direction of the generator.
In the above technical solution, in the rotation direction of the generator, the starting point of the ventilation slot is located at the front end of the toothed slot, and the structure is defined as a front-mounted type. When the rotor of the generator rotates, the rotor drives air to rotate to form centrifugal airflow; the centrifugal airflow formed by rotation of the generator can be fully utilized due to the front arrangement of the tooth pressing plates, the airflow circulation speed near the outer side of the winding in the ventilation groove is increased, and the winding temperature rise is reduced. The technical scheme has simple and compact structure and reasonable design; the space between the circumferentially adjacent windings of the stator is completely open, the maximum ventilation sectional area is ensured, the circulating air speed is improved, the air flow heat exchange efficiency is enhanced, and the cooling effect is good; the curve design is adopted to optimize the pneumatic performance between the ventilation slot plates, and the circulating air speed and the heat exchange efficiency are further improved, so that the temperature rise of the motor is further reduced; the good cooling effect is favorable for reducing the manufacturing cost of the generator.
Preferably, the smooth curve is a straight line or a circular arc line or a spline curve or a streamline curve. And the curve design is adopted to optimize the pneumatic performance between the ventilation slot plates, so that the circulating air speed and the heat exchange efficiency are further improved, and the temperature rise of the motor is further reduced.
Preferably, a vector formed by the starting point and the end point of the tooth pressing piece forms an obtuse angle with a generator rotating direction vector. The structure forms a retroversion of the vent slot.
Preferably, a vector formed by the starting point and the end point of the tooth pressing piece forms an acute angle with a generator rotation direction vector. The structure forms a forward leaning structure of the vent slot.
Preferably, the tooth pressing plates are vertically welded on the groove bottom plate. The structure makes tooth pressure piece be difficult for empting, is convenient for weld and assembly, improves production efficiency.
Preferably, the groove bottom plate overlaps the main body. The structure ensures that the slot bottom plate is tightly combined with the main body part.
Preferably, the inner ring of the groove bottom plate is provided with positioning teeth for positioning. The structure facilitates the positioning and fixing of the slot bottom plate and the main body part.
Preferably, a spoiler is arranged in the ventilation groove. The spoiler plays a role in disturbing flow to the air in the ventilation groove, and resistance is reduced.
The utility model has the advantages that: (1) the structure is simple and compact, the design is reasonable, the tooth pressing piece is not easy to topple, the welding and the assembly are convenient, and the production efficiency is improved; (2) the space between the circumferentially adjacent windings of the stator is completely open, the maximum ventilation sectional area is ensured, the circulating air speed is improved, the air flow heat exchange efficiency is enhanced, and the cooling effect is good; (3) the curve design is adopted to optimize the pneumatic performance between the ventilation slot plates, and the circulating air speed and the heat exchange efficiency are further improved, so that the temperature rise of the motor is further reduced; (4) the good cooling effect is favorable for reducing the manufacturing cost of the generator.
Drawings
FIG. 1 is a schematic structural view of example 1;
FIG. 2 is a schematic structural view of example 2;
FIG. 3 is a schematic structural view of embodiment 3.
In the figure: stator core 1, main part 1.1, profile of tooth portion 1.2, tooth-shaped groove 1.3, groove bottom plate 2, location tooth 2.1, tooth clamp 3, ventilation groove 4, spoiler 5.
Detailed Description
The invention is further described with reference to the accompanying drawings and specific embodiments.
In the figure: stator core 1, main part 1.1, profile of tooth portion 1.2, tooth-shaped groove 1.3, groove bottom plate 2, location tooth 2.1, tooth clamp 3, ventilation groove 4, spoiler 5.
Example 1:
as shown in fig. 1, the front ventilation slot plate structure of the stator core of the direct cooling generator comprises a stator core 1, a slot bottom plate 2 and a tooth pressing sheet 3, wherein the stator core 1 comprises a circular arc main body part 1.1 and a tooth-shaped part 1.2 positioned in the inner circle of the main body part 1.1, the tooth-shaped part 1.2 is circumferentially distributed along the axis of the main body part 1.1, and a tooth-shaped slot 1.3 is formed between the tooth-shaped parts 1.2; the tank floor 2 is fixed on the main body 1.1, and the tank floor 2 coincides with the main body 1.1. The tooth pressing plates 3 are vertically welded on the groove bottom plate 2. The inner ring of the groove bottom plate 2 is provided with positioning teeth 2.1 for positioning. The starting point of the tooth pressing sheet 3 is close to the inner circle of the main body part 1.1; the end point of the tooth pressing piece 3 is close to the excircle of the main body part 1.1, and the starting point and the end point of the tooth pressing piece 3 are connected by a smooth curve; the vector formed by the starting point and the end point of the tooth pressing sheet 3 forms an acute angle with the rotating direction vector of the generator. Two adjacent tooth pressing sheets 3 form a ventilation groove 4, and the starting point of the ventilation groove 4 is positioned at the front end of the tooth-shaped groove 1.3 in the rotation direction of the generator.
In the above technical solution, the arrow direction in the figure is the rotation direction of the generator rotor, and in the rotation direction of the generator, the starting point of the ventilation slot 4 is located at the front end of the tooth-shaped slot 1.3, that is, the structure is defined as a front-mounted type. When the rotor of the generator rotates, the rotor drives air to rotate to form centrifugal airflow; the front arrangement of the tooth pressing sheet 3 can fully utilize centrifugal airflow formed by rotation of the generator, improve the airflow circulation speed near the outer side of the winding in the ventilation groove 4 and reduce the temperature rise of the winding. The technical scheme has simple and compact structure and reasonable design; the space between the circumferentially adjacent windings of the stator is completely open, the maximum ventilation sectional area is ensured, the circulating air speed is improved, the air flow heat exchange efficiency is enhanced, and the cooling effect is good; the curve design is adopted to optimize the pneumatic performance between the ventilation slots 4, and the circulating air speed and the heat exchange efficiency are further improved, so that the temperature rise of the motor is further reduced; the good cooling effect is favorable for reducing the manufacturing cost of the generator.
Example 2:
as shown in fig. 2, a direct cooling generator stator core front-mounted ventilation slot plate structure is the same as that of embodiment 1 in most of its structures, except that: the vector formed by the starting point and the end point of the tooth pressing sheet 3 forms an obtuse angle with the vector of the rotating direction of the generator. In the above technical solution, the structure forms a backward tilting structure of the ventilation slot 4.
Example 3:
as shown in fig. 3, in addition to embodiment 1, a spoiler 5 is provided in the ventilation groove 4. The spoiler 5 plays a role of disturbing flow for the air in the ventilation groove 4, and the resistance is reduced.
The utility model has the advantages that: the structure is simple and compact, the design is reasonable, the tooth pressing piece is not easy to topple, the welding and the assembly are convenient, and the production efficiency is improved; the space between the circumferentially adjacent windings of the stator is completely open, the maximum ventilation sectional area is ensured, the circulating air speed is improved, the air flow heat exchange efficiency is enhanced, and the cooling effect is good; the curve design is adopted to optimize the pneumatic performance between the ventilation slot plates, and the circulating air speed and the heat exchange efficiency are further improved, so that the temperature rise of the motor is further reduced; the good cooling effect is favorable for reducing the manufacturing cost of the generator.
Claims (7)
1. A front ventilation slot plate structure of a stator core of a direct cooling generator is characterized by comprising the stator core, a slot bottom plate and a tooth pressing piece, wherein the stator core comprises a circular arc-shaped main body part and tooth-shaped parts positioned in the inner circle of the main body part, the tooth-shaped parts are circumferentially distributed along the axis of the main body part, and tooth-shaped slots are formed among the tooth-shaped parts; the groove bottom plate is fixed on the main body part, the tooth pressing piece is fixed with the groove bottom plate, and the starting point of the tooth pressing piece is close to the inner circle of the main body part; the end point of the tooth pressing piece is close to the excircle of the main body part, and the starting point and the end point of the tooth pressing piece are connected by a smooth curve; two adjacent tooth pressing sheets form a ventilation groove, and the starting point of the ventilation groove is positioned at the front end of the tooth groove in the rotation direction of the generator.
2. The forward ventilating slot plate structure of the stator core of the direct cooling generator as claimed in claim 1, wherein the smooth curve is a straight line or a circular arc line or a spline curve or a streamline curve.
3. The stator core forward ventilation slot plate structure of the direct cooling generator as claimed in claim 1, wherein the vector formed by the starting point and the end point of the tooth pressing piece forms an obtuse angle with the rotating direction vector of the generator.
4. The forward ventilating slot plate structure of stator core of direct cooling generator as claimed in claim 1, wherein the vector formed by the starting point and the end point of said tooth pressing piece forms an acute angle with the vector of the rotation direction of the generator.
5. The direct cooling generator stator core forward ventilating slot plate structure as claimed in claim 1, 2, 3 or 4, wherein the tooth pressing plates are vertically welded on the slot bottom plate.
6. The direct cooling generator stator core forward ventilating slot plate structure as claimed in claim 1, 2, 3 or 4, wherein the slot bottom plate is coincident with the main body part.
7. The direct cooling generator stator core forward ventilating slot plate structure as claimed in claim 1, 2, 3 or 4, wherein the inner ring of the slot bottom plate is provided with positioning teeth for positioning.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021221642.1U CN212676971U (en) | 2020-06-28 | 2020-06-28 | Direct-cooling generator stator core front-mounted ventilation slot plate structure |
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|---|---|---|---|
| CN202021221642.1U CN212676971U (en) | 2020-06-28 | 2020-06-28 | Direct-cooling generator stator core front-mounted ventilation slot plate structure |
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| CN212676971U true CN212676971U (en) | 2021-03-09 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111864931A (en) * | 2020-06-28 | 2020-10-30 | 浙江运达风电股份有限公司 | Direct-cooling generator stator core front-mounted ventilation slot plate structure |
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- 2020-06-28 CN CN202021221642.1U patent/CN212676971U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111864931A (en) * | 2020-06-28 | 2020-10-30 | 浙江运达风电股份有限公司 | Direct-cooling generator stator core front-mounted ventilation slot plate structure |
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