阅读说明：本技术 轴向通风直冷式双馈风力发电机 (Axial ventilation direct cooling type double-fed wind driven generator ) 是由 林晓宁 刘新峰 朱铭锴 何庆峰 于秀丽 于 2020-06-12 设计创作，主要内容包括：本发明的轴向通风直冷式双馈风力发电机,包括电机本体、进风组件和出风组件；电机定子外部连通有筒体结构；筒体结构连通有箱体结构形成风道；箱体结构连通有用于输入冷空气的进风组件和用于抽出热空气的出风组件。本发明的有益效果是：相比同功率等级其他型号的双馈发电机,具有工艺性好、温升低、成本低、可靠性高、易于维护等优点。(The invention relates to an axial ventilation direct cooling double-fed wind driven generator, which comprises a motor body, an air inlet assembly and an air outlet assembly; the outer part of the motor stator is communicated with a cylinder structure; the cylinder structure is communicated with a box structure to form an air duct; the box structure is communicated with an air inlet component for inputting cold air and an air outlet component for extracting hot air. The invention has the beneficial effects that: compared with double-fed generators of other models with the same power grade, the double-fed generator has the advantages of good manufacturability, low temperature rise, low cost, high reliability, easiness in maintenance and the like.)

1. The utility model provides an axial ventilation direct cooling formula double-fed aerogenerator which characterized in that: comprises a motor body, an air inlet component (5) and an air outlet component (6); the motor body comprises a motor stator (7), a motor rotor (8) and a slip ring chamber (9); the radial outer part of the motor stator (7) is communicated with a cylinder structure (19) arranged along the axial direction of the motor stator; the two axial ends of the cylinder structure (19) are communicated with a box structure to form an air duct; the box body structure close to the motor body transmission end is communicated with an air inlet assembly (5) used for inputting cold air into the air channel, and the box body structure far away from the motor body transmission end is communicated with an air outlet assembly (6) used for discharging hot air in the air channel.

2. The axial ventilation direct cooling doubly-fed wind generator of claim 1, characterized in that: the motor stator (7) is provided with an axial ventilation groove; the motor rotor (8) is provided with an axial vent hole; the ventilation groove is communicated with the ventilation hole and the air channel.

3. The axial ventilation direct cooling doubly-fed wind generator of claim 1, characterized in that: the air outlet assembly (6) comprises an air outlet cover (14), a filtering mounting frame (15) and a filtering blade plate; an inlet of the air outlet cover (14) is communicated with the air duct, and an outlet of the air outlet cover (14) is provided with a filtering and installing frame (15); a filtering blade plate is arranged in the filtering installation frame (15); the filter blade plate comprises a plurality of filter blades (16) which are arranged in a row and are mutually spaced; and a filtering channel with gradually enlarged caliber is arranged between the adjacent filtering blades (16).

4. The axial ventilation direct cooling doubly-fed wind generator of claim 3, characterized in that: the filter blade (16) comprises an arc surface part (16.1), a drainage part (16.2) and a flow blocking part (16.3); the circle center of the cambered surface part (16.1) is positioned on one side of the filtering blade plate, which is back to the air outlet cover (14); one end of the flow guide part (16.2) is tangent to one radial end of the cambered surface part (16.1), and the other end of the flow guide part (16.2) extends towards the direction far away from the filtering blade plate and is aligned with the other radial end of the cambered surface part (16.1); the flow blocking part (16.3) is arranged at the tangent position of the drainage part (16.2) and the cambered surface part (16.1) and is positioned at one side back to the circle center of the cambered surface part (16.1).

5. The axial-ventilation direct-cooling doubly-fed wind generator of claim 4, wherein: the filtering channel comprises a cyclone channel (16.4) surrounded by an arc surface, a flow blocking part (16.3) and a partial drainage part (16.2); and a foreign matter collecting device (17) is arranged at the lower end of the cyclone channel (16.4) of the filtering and mounting frame (15).

6. The axial ventilation direct cooling doubly-fed wind generator of claim 1, characterized in that: the air inlet component (5) comprises a cooling fan (10), an air guide cover (11) and an air filter plate (12); the cooling fan (10) is communicated with the air guide cover (11); the air guide cover (11) comprises at least one air inlet and at least one air outlet; the air filter plate (12) is arranged at the air inlet and is used for filtering air; the air outlet is communicated with the air duct.

7. The axial-ventilation direct-cooling doubly-fed wind generator of claim 6, wherein: the air filter plate (12) is detachably connected with the air guide cover (11).

8. The axial-ventilation direct-cooling doubly-fed wind generator of claim 6, wherein: the air guide cover (11) is positioned on the inner side of the air filter plate (12) and is provided with an air guide plate.

9. The axial-ventilation direct-cooling doubly-fed wind generator of claim 6, wherein: an air pressure difference sensor (13) is arranged on the air guide cover (11) or the air filter plate (12).

10. The axial ventilation direct cooling doubly-fed wind generator of claim 1, characterized in that: the barrel structure (19) is provided with cleaning holes (18) and plugging heads along the circumferential direction.

Technical Field

The invention belongs to the technical field of generators, and particularly relates to an axial ventilation direct cooling type double-fed wind driven generator.

Background

At present, three modes of air-air cooling, air-water cooling and water jacket cooling are mostly adopted in the mainstream double-fed wind driven generator cooling modes at home and abroad. With the gradual increase of the power grade of the generator and the continuous increase of the cost pressure of the wind power industry, the technical problems of reducing the temperature rise of the winding, improving the reliability of the motor and reducing the cost of wind power generation need to be solved. Therefore, the problem of how to reduce the winding temperature rise and the generator cost and improve the reliability of the motor is solved, and the key of the design of the wind driven generator is realized. The air-air cooling double-fed wind driven generator shown in fig. 1 comprises an air-air cooler 2 and a motor body 1, and adopts an air-air cooling mode, so that the cooling efficiency is relatively low because a cooling loop is cooled secondarily. The air-water cooling double-fed wind driven generator shown in fig. 2 comprises an air-water cooler 3 and a motor body 1, adopts an air-water cooling mode, needs to be provided with a set of water circulation cooling system, is high in cost, large in size, inconvenient to maintain and has higher requirements on cabin corollary equipment. The water jacket cooling double-fed wind driven generator shown in fig. 3 comprises a water jacket cooler 4 and a motor body 1, adopts a water jacket cooling mode, has a complex processing technology of a water jacket base, needs a set of water circulation cooling system, has high cost, large volume and inconvenient maintenance, and has higher requirements on cabin corollary equipment.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide an axial ventilation direct cooling type double-fed wind driven generator which has the advantages of high reliability, low cost, low temperature rise and the like.

The purpose of the invention is solved by the following technical scheme:

the axial ventilation direct cooling double-fed wind driven generator comprises a motor body, an air inlet assembly and an air outlet assembly; the motor body comprises a motor stator, a motor rotor and a slip ring chamber; the radial outer part of the motor stator is communicated with a cylinder structure arranged along the axial direction of the motor stator; the two axial ends of the cylinder structure are communicated with a box structure to form an air duct; the box body structure close to the motor body transmission end is communicated with an air inlet assembly used for inputting cold air into the air channel, and the box body structure far away from the motor body transmission end is communicated with an air outlet assembly used for discharging hot air in the air channel.

Further, the motor stator is provided with an axial ventilation slot; the motor rotor is provided with an axial vent hole; the ventilation groove is communicated with the ventilation hole and the air channel.

Further, the air outlet assembly comprises an air outlet cover, a filtering installation frame and a filtering leaf plate; the inlet of the air outlet cover is communicated with the air duct, and the outlet of the air outlet cover is provided with a filtering installation frame; a filter blade plate is arranged in the filter mounting frame; the filter blade plate comprises a plurality of filter blades which are arranged in a row and are mutually spaced; and a filtering channel with gradually enlarged caliber is arranged between the adjacent filtering blades.

Further, the filter blade comprises an arc surface part, a flow guiding part and a flow blocking part; the circle center of the cambered surface part is positioned on one side of the filtering blade plate back to the air outlet cover; one end of the drainage part is tangent to one radial end of the cambered surface, and the other end of the drainage part extends towards the direction far away from the filtering blade plate and is aligned with the other radial end of the cambered surface; the flow blocking part is arranged at the tangent position of the flow guiding part and the cambered surface part and is positioned on one side back to the circle center of the cambered surface part.

Furthermore, the filtering channel comprises a cyclone channel surrounded by an arc surface, a flow blocking part and a partial flow guiding part; the filtering installation frame is positioned at the lower end of the cyclone channel and is provided with a foreign matter collecting device.

Furthermore, the air inlet component comprises a cooling fan, an air guide cover and an air filter plate; the cooling fan is communicated with the air guide cover; the air guide cover comprises at least one air inlet and at least one air outlet; the air filter plate is arranged at the air inlet and is used for filtering air; the air outlet is communicated with the air duct.

Furthermore, the air filter plate is detachably connected with the air guide cover.

Furthermore, the wind scooper is arranged on the inner side of the air filter plate and is provided with a wind deflector.

Furthermore, an air pressure difference sensor is arranged on the air guide cover or the air filter plate.

Further, the barrel structure is provided with a cleaning hole and a plugging head along the circumferential direction.

The invention has the beneficial effects that: the air duct formed by the barrel structure and the box structure is matched with the air inlet assembly and the air outlet assembly, so that a radial air path of the stator core, the rotor core and the base is not needed, the radial ventilation grooves of the stator core and the rotor core can be omitted, and the risk that paint and rust fall from the radial ventilation grooves after the motor runs for a certain time is fundamentally avoided. The effects of shortening the axial length of the motor, saving space, reducing weight and saving cost are achieved. Compared with the double-fed generators of other models with the same power grade, the double-fed generator of the invention has the advantages of good manufacturability, low temperature rise, low cost, high reliability, easy maintenance and the like.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.

Fig. 1 is a schematic structural diagram of a conventional air-to-air cooling doubly-fed wind generator.

Fig. 2 is a schematic structural diagram of a conventional air-water cooling doubly-fed wind generator.

Fig. 3 is a structural schematic diagram of a conventional water jacket-cooled doubly-fed wind generator.

FIG. 4 is a schematic front view of an axial ventilation direct cooling doubly-fed wind generator according to the present invention.

Fig. 5 is a schematic view showing the flow direction of air in fig. 4.

Fig. 6 is a schematic perspective view of the air intake assembly in fig. 4.

Fig. 7 is a schematic front view of the air outlet assembly shown in fig. 4.

Fig. 8 is a side view of fig. 7.

Fig. 9 is a schematic sectional structure view of the plane a-a of fig. 7.

Fig. 10 is a partially enlarged schematic view of fig. 9.

Fig. 11 is a perspective view of the barrel structure of fig. 4.

Wherein: 1. an electric machine body; 2. an air-to-air cooler; 3. an air-water cooler; 4. a water jacket cooler; 5. an air intake assembly; 6. an air outlet assembly; 7. a motor stator; 8. a motor rotor; 9. a slip ring chamber; 10. a cooling fan; 11. a wind scooper; 12. an air filter plate; 13. a differential air pressure sensor; 14. an air outlet cover; 15. a filtering installation frame; 16. a filter blade; 16.1, an arc surface part; 16.2, a drainage part; 16.3, a flow blocking part; 16.4, a cyclone channel; 17. a foreign matter collecting device; 18. cleaning the hole; 19. a cylinder structure.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus consistent with certain aspects of the invention, as detailed in the appended claims.

In order to make those skilled in the art better understand the technical solution of the present invention, the following detailed description of the present invention is provided with reference to the accompanying drawings and examples.

Referring to fig. 4-11, the axial ventilation direct cooling type double-fed wind driven generator comprises a motor body, an air inlet assembly 5 and an air outlet assembly 6; the motor body comprises a motor stator 7, a motor rotor 8 and a slip ring chamber 9; the radial outer part of the motor stator 7 is communicated with a cylinder structure 19 arranged along the axial direction; the axial two ends of the cylinder structure 19 are communicated with a box structure to form an air duct; the box structure that is close to motor body transmission end communicates has the air inlet subassembly 5 that is used for inputing cold air to the wind channel in, and the box structure intercommunication that keeps away from motor body transmission end has the air-out subassembly 6 that is used for discharging hot air in the wind channel.

The motor stator 7 is provided with an axial ventilation slot; the motor rotor 8 is provided with an axial vent hole; the ventilation groove is communicated with the ventilation hole and the air channel.

The air inlet component 5 comprises a cooling fan 10, an air guide cover 11 and an air filter plate 12; the cooling fan 10 is communicated with the air guide cover 11; the wind scooper 11 comprises at least one wind inlet and at least one wind outlet; the air filter plate 12 is arranged at the air inlet and used for filtering air; the air outlet is communicated with the air duct. The air filter plate 12 is detachably connected with the air guiding cover 11. The wind scooper 11 is provided with a wind deflector at the inner side of the air filter plate 12, and the wind deflector can reduce wind resistance and improve heat exchange efficiency. An air pressure difference sensor 13 is arranged on the air guide cover 11 or the air filter plate 12.

The filtering structure of the air filtering plate 12 in this embodiment adopts filter cotton of G4 filtering grade, which can effectively filter dust particles with diameter larger than or equal to 5 μm, and the filtering efficiency is as high as 90%. The filter cotton is fixed by the sheet metal frame, and the sheet metal frame mainly plays supporting, protective action. The air filter plate 12 is fixed by adopting a quick-release buckle, and the buckle can be disassembled and installed by a single hand, so that the field maintenance is facilitated. The air pressure difference sensor 13 is used for monitoring the resistance of the filter cotton, and the filter cotton needs to be replaced in time when the resistance meets the design specification requirement.

The air outlet assembly 6 comprises an air outlet cover 14, a filtering installation frame 15 and a filtering blade plate; the inlet of the air outlet housing 14 is communicated with the air duct, and the outlet of the air outlet housing 14 is provided with a filtering installation frame 15; a filter blade plate is arranged in the filter mounting frame 15; the filter vane plate comprises a plurality of filter vanes 16 arranged in a row and spaced from each other; a filtering channel with gradually enlarged caliber is arranged between the adjacent filtering vanes 16. The filter blade 16 comprises an arc surface part 16.1, a flow guide part 16.2 and a flow blocking part 16.3; the circle center of the cambered surface part 16.1 is positioned on one side of the filtering leaf plate back to the air outlet cover 14; one end of the drainage part 16.2 is tangent to one radial end of the cambered surface part 16.1, and the other end of the drainage part 16.2 extends towards the direction far away from the filtering blade plate and is aligned with the other radial end of the cambered surface part 16.1; the flow blocking part 16.3 is arranged at the tangent position of the flow guiding part 16.2 and the cambered surface part 16.1 and is positioned at one side back to the circle center of the cambered surface part 16.1. The filtering channel comprises a cyclone channel 16.4 surrounded by a cambered surface, a flow blocking part 16.3 and a partial flow guiding part 16.2; the filter mounting frame 15 is provided with a foreign matter collecting device 17 at the lower end of the cyclone passage 16.4.

When the air outlet cover 14 is exhausted outwards, airflow enters the filtering channel along the cambered surface portion 16.1, collides with the flow blocking portion 16.3 and then enters the cyclone channel 16.4, and finally flows out from the tail end of the filtering channel under the centrifugal guiding action of the cambered surface portion 16.1 and the flow guiding portion 16.2. The special structure can reduce wind resistance as much as possible, and can effectively prevent foreign matters from entering the inside of the air outlet cover 14; even when foreign matters enter the filter passage, the foreign matters drop into the foreign matter collecting device 17 by the centrifugal force of the cyclone in the cyclone passage 16.4 and the gravity of the foreign matters themselves. The foreign matter collecting means 17 may include a foreign matter collecting hole provided on the filter mounting frame 15 to communicate with the cyclone passage 16.4 and a collecting bag communicating with the foreign matter collecting hole.

The cylindrical structure 19 is provided with cleaning holes 18 and plugging heads along the circumferential direction. The cleaning aperture 18 may have at least two turns, one near the motor body drive end and one near the motor body non-drive end. Observation windows can be arranged at the two axial ends of the cylinder structure 19 or on the box body structure; the blocking heads on the cleaning holes 18 are opened, compressed air can be injected into the air duct from the cleaning holes 18, high-pressure air flow is blown to the box body structures at the two ends of the motor body along the air duct, cleaning of the air duct is achieved, and maintenance personnel can clean and maintain the box body structures at the end portions through the observation windows.

The air inlets of the four directions of the cold air passing through the wind scooper 11 are filtered by the air filter plate 12 and then enter the air channel, the cold air is pushed to enter the axial ventilation groove of the motor stator 7 along the axial direction by the rotation of the motor rotor 8 and the positive pressure of the air at the transmission end side in the motor body through the rotation of the motor rotor 8, the axial ventilation hole of the motor rotor 8 and the air gap between the motor stator 7 and the motor rotor 8, after heat exchange, the cold air is heated to be hot air, the hot air passes through the wind outlet cover 14 and is discharged after filtering the blade plate, and the axial cooling of the motor body is realized.

The foregoing are merely exemplary embodiments of the present invention, which enable those skilled in the art to understand or practice the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention.

It is to be understood that the present invention is not limited to what has been described above, and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.