CN212063670U

CN212063670U - Generator with fan

Info

Publication number: CN212063670U
Application number: CN202020884075.1U
Authority: CN
Inventors: 彭飞飞; 罗建群; 李寒晖; 聂义勇
Original assignee: Kangfu Technology Co ltd
Current assignee: Kangfu Technology Co ltd
Priority date: 2020-05-22
Filing date: 2020-05-22
Publication date: 2020-12-01
Anticipated expiration: 2030-05-22

Abstract

The utility model discloses a generator with a fan, belonging to the field of generators, which comprises a hood shell, wherein a stator core and a rotor core are arranged in the hood shell; air inlets are formed in two ends of the hood shell, an air outlet window is formed in the middle of the hood shell, and an axial flow fan is arranged on the air outlet window. Cold air flows from two ends to the middle, the air path is short, the wind resistance is small, the heat dissipation of the stator core and the rotor core is uniform, the air circulation is accelerated by the axial flow fan, the flow direction of media in the air pipe is not changed, and the heat dissipation effect is good.

Description

Generator with fan

Technical Field

The utility model relates to a generator field especially relates to a take generator of fan.

Background

In a small and medium-sized synchronous generator, the heat dissipation design of a winding is a very important part of the design of the generator, and the heat dissipation effect of the winding directly influences the temperature rise of the winding and influences the reliability and the economy of the generator. The air-cooled generator is generally provided with a centrifugal fan at one end of a generator rotor, air enters the generator from one end of the generator through the fan, passes through a stator iron core, a stator ventilating plate, a stator winding, a rotor iron core and a rotor winding of the generator, and brings out heat generated by the generator from the other end of the generator, so that the purpose of heat dissipation of the stator winding and the rotor winding is achieved. The rotating speed of a rotor of the generator directly influences the ventilation and heat dissipation of the generator, and a low-rotating-speed generator adopts a common centrifugal fan, so that the heat dissipation air quantity is often insufficient. The high-speed generator adopts a common centrifugal fan, and the noise is often very loud. The variable speed generator cannot ensure that the heat dissipation air quantity remains unchanged.

The existing generator has the defects of long wind path, large wind resistance and uneven heat dissipation effect on the inner winding of the generator, and the common difference between the highest temperature and the lowest temperature of the winding of the generator is 30K to 40K.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the technical problem to be solved by the utility model is to provide a generator with a fan, which reduces the wind resistance of the wind path of the generator and makes the heat dissipation in the generator more uniform; the efficiency of ventilation cooling is improved.

To achieve the purpose, the utility model adopts the following technical proposal:

the utility model provides a generator with a fan, which comprises a hood shell, wherein a stator core and a rotor core are arranged in the hood shell; air inlets are formed in two ends of the hood shell, an air outlet window is formed in the middle of the hood shell, and an axial flow fan is arranged on the air outlet window. The cold air flows from the two ends to the middle, the air path is short, the wind resistance is small, and the heat dissipation of the stator core and the rotor core is uniform.

The utility model has the preferable technical proposal that both ends of the stator core are fixedly connected with the inner wall of the housing of the engine cover, and the rotor core is positioned inside the stator core; and a stator ventilating plate is arranged in the middle of the stator core, so that air at the rotor core flows out to the air outlet window through the stator ventilating plate. The rotor core can form a better air circulation passage, and meanwhile, the heat of the stator core can be well taken away, so that the whole heat dissipation effect is good.

The utility model discloses preferred technical scheme lies in, stator ventilating board is along radially being provided with a plurality of ventiduct. The stator winding is embedded in the stator iron core, and the rotor winding is wound on the rotor iron core; the number of the ventilation channels is matched with the number of the stator windings and the number of the rotor windings. On the premise of meeting the heat dissipation requirement, the number of the air channels is controlled, and the cost is reduced.

The utility model discloses preferred technical scheme lies in, stator core with be provided with the clearance between the hood shells inner wall. So that the air around the stator core can be better circulated.

The utility model has the preferable technical proposal that the two ends of the hood shell are respectively provided with a front end cover and a rear end cover; the front end cover and the rear end cover are provided with a plurality of air inlet holes. The air inlet is convenient to enter from the two ends, the number of the air inlet holes needs to be controlled in a proper range, the air inlet amount at one end is not enough to support the air exhaust amount of the air outlet window, and the air inlet total amount at the two ends can be larger than the air exhaust amount of the air outlet window. So that the air path is short and the heat dissipation is good.

The utility model discloses preferred technical scheme lies in, axial fan's power end with the power output end electric connection of generator. The wind-driven generator is not influenced by the ventilation and heat dissipation of the generator by the rotating speed of the generator, the proper axial flow fan is selected to improve the wind quantity of the low-rotating-speed generator, reduce the noise of the high-rotating-speed generator and ensure the wind quantity of the variable-speed generator to be unchanged.

The utility model discloses preferred technical scheme lies in, air outlet window symmetry set up in the both sides at aircraft bonnet casing middle part, air outlet department of air outlet window is provided with the guard plate, be provided with a plurality of exhaust vents on the guard plate. The quantity of the air outlet holes is convenient for controlling the air outlet quantity.

The utility model discloses preferred technical scheme lies in, rotor core with be provided with the clearance between the stator core, rotor core is provided with the breach. The air circulation performance at the position of the rotor core is better, and the heat dissipation effect is better.

The utility model has the advantages that:

the utility model provides a generator with a fan, which comprises a hood shell, wherein a stator core and a rotor core are arranged in the hood shell; air inlets are formed in two ends of the hood shell, an air outlet window is formed in the middle of the hood shell, and an axial flow fan is arranged on the air outlet window. Cold air flows from two ends to the middle, the air path is short, the wind resistance is small, the heat dissipation of the stator core and the rotor core is uniform, the air circulation is accelerated by the axial flow fan, the flow direction of media in the air pipe is not changed, and the heat dissipation effect is good.

Drawings

Fig. 1 is a schematic main view and a half-section of a generator with a fan according to an embodiment of the present invention;

fig. 2 is a left side half-sectional schematic view of a generator with a fan according to an embodiment of the present invention;

fig. 3 is a schematic top half-sectional view of a generator with a fan according to an embodiment of the present invention;

fig. 4 is a schematic diagram of a portion a in fig. 2 according to an embodiment of the present invention.

In the figure:

1. an air outlet window; 2. a front end cover; 3. a stator winding; 4. a stator core; 5. an axial flow fan; 6. a stator vent plate; 7. a rotor core; 8. a rotor winding; 9. a hood housing; 10. a rear end cap; 11. a protection plate; 12. an air outlet; 21. an air inlet hole; 41. a notch; 61. an air duct.

Detailed Description

The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.

As shown in fig. 1 to 4, the generator with a fan provided in the present embodiment includes a hood housing 9, where a stator core 4 and a rotor core 7 are disposed inside the hood housing 9; air inlets are formed in two ends of the hood shell 9, an air outlet window 1 is formed in the middle of the hood shell 9, and an axial flow fan 5 is arranged on the air outlet window 1. The cold air flows from the two ends to the middle, the air path is short, the wind resistance is small, and the heat dissipation of the stator core 4 and the rotor core 7 is uniform. The traditional mode of radiating along the generator axial is changed, and the air inlet middle parts at the two ends are used for exhausting air, so that a better air path is formed, and the radiating effect is better. Cold air flows from two ends to the middle, the air path is short, the wind resistance is small, the heat dissipation of the stator core 4 and the rotor core 7 is uniform, the air circulation is accelerated by the axial flow fan 5, the flow direction of media in the air pipe is not changed, and the heat dissipation effect is good.

In order to enable the internal rotor core 7 to have a better heat dissipation effect, two ends of the stator core 4 are fixedly connected with the inner wall of the hood housing 9, and the rotor core 7 is positioned inside the stator core 4; and a stator ventilating plate 6 is arranged in the middle of the stator core 4, so that air at the rotor core 7 flows out to the air outlet window 1 through the stator ventilating plate 6. The rotor core 7 can form a better air circulation passage, and simultaneously can well take away the heat of the stator core 4, so that the whole heat dissipation effect is good.

Further, the stator ventilation board 6 is provided with a plurality of ventilation channels 61 in the radial direction. The stator winding 3 is embedded in the stator core 4, and the rotor winding 8 is wound on the rotor core 7; the number of the ventilation ducts 61 is matched with the number of the stator windings 3 and the rotor windings 8. On the premise of meeting the heat dissipation requirement, the number of the air channels 61 is controlled, and the cost is reduced.

Preferably, a gap is provided between the stator core 4 and an inner wall of the hood housing 9. So that the air around the stator core 4 can be better circulated. Air can flow from two ends to the middle, so that heat on the outer side of the stator core 4 can be well taken away.

Preferably, the front end cover 2 and the rear end cover 10 are respectively arranged at two ends of the hood shell 9; the front end cover 2 and the rear end cover 10 are both provided with a plurality of air inlet holes 21. The air is convenient to enter from the two ends, the number of the air inlet holes 21 needs to be controlled in a proper range, the air inlet amount at one end is not enough to support the air exhaust amount of the air outlet window 1, and the air inlet total amount at the two ends can be larger than the air exhaust amount of the air outlet window 1. So that the air path is short and the heat dissipation is good.

Preferably, the power end of the axial flow fan 5 is electrically connected with the power output end of the generator. The axial flow fan 5 can keep a relatively constant rotating speed, is not influenced by the rotating speed of the generator to ventilate and radiate the generator, and can improve the air quantity of the low-rotating-speed generator, reduce the noise of the high-rotating-speed generator and ensure the constant air quantity of the variable-speed generator.

Preferably, the air outlet windows 1 are symmetrically arranged on two sides of the middle part of the hood shell 9, a protection plate 11 is arranged at the air outlet of the air outlet window 1, and a plurality of air outlet holes 12 are formed in the protection plate 11. The quantity of the air outlet holes 12 is convenient for controlling the air outlet quantity.

Preferably, a gap is provided between the rotor core 7 and the stator core 4, and the rotor core 7 is provided with a notch 41. The air circulation at the position of the rotor core 7 is better, and the heat dissipation effect is better.

Welding the hood shell 9 by using a steel welding machine, and forming an air outlet window 1 in the middle of the hood shell 9; when the stator iron core 4 is laminated, the stator ventilation plate 6 is arranged in the middle of the stator iron core 4, so that radial air channels for stator ventilation are formed, and the number of the radial air channels is determined according to the heating loss of the stator winding 3 and the heating loss of the rotor winding 8; a laminated rotor core 7; embedding a stator winding 3 in a stator iron core 4, and winding a rotor winding 8 on a rotor iron core 7; selecting a proper axial flow fan 5 according to the heating loss condition of the generator, and installing the axial flow fan 5 on the air outlet window 1 of the hood shell 9; the front end cover 2 and the rear end cover 10 are provided with air inlet windows.

The flow direction of the cold air when the generator is running is shown by the arrow direction in fig. 1, 2 and 3. Cold air enters the generator from the two ends of the front end cover 2 and the rear end cover 10 and respectively contacts the end part of the stator winding 3, the inner surface and the outer surface of the stator core 4 and the middle air channel of the stator core 4, the outer surface of the rotor core 7, the end part and the surface of the rotor winding 8, and hot air is pumped out of the middle part of the housing shell 9 through the axial flow fan 5, so that the ventilation and heat dissipation requirements of the generator are met.

Because the wind enters from the front end cover 2 and the rear end cover 10 and two parallel mixed wind paths for discharging wind from the middle part of the hood shell 9 are adopted, the wind resistance of the wind paths of the generator is reduced, the heat dissipation in the generator is more uniform, and the heat dissipation effect of the generator is improved. Because the power supply output by the generator is utilized to supply power to the axial flow fan 5, the influence of the rotating speed of the generator on the ventilation and heat dissipation of the generator is avoided, the proper axial flow fan 5 is selected to improve the air quantity of the low-rotating-speed generator, reduce the noise of the high-rotating-speed generator and ensure the constant air quantity of the variable-speed generator.

While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the invention. The present invention is not to be limited by the specific embodiments disclosed herein, and other embodiments that fall within the scope of the claims of the present application are intended to be within the scope of the present invention.

Claims

1. A generator with a fan comprises a hood shell (9), wherein a stator core (4) and a rotor core (7) are arranged in the hood shell (9); the method is characterized in that:

air inlets are formed in two ends of the hood shell (9), an air outlet window (1) is formed in the middle of the hood shell (9), and an axial flow fan (5) is arranged on the air outlet window (1).

2. The wind turbine generator of claim 1, wherein:

the two ends of the stator core (4) are fixedly connected with the inner wall of the hood shell (9), and the rotor core (7) is positioned in the stator core (4);

and a stator ventilating plate (6) is arranged in the middle of the stator core (4), so that air at the position of the rotor core (7) flows out to the air outlet window (1) through the stator ventilating plate (6).

3. The wind turbine generator of claim 2, wherein:

the stator ventilating plate (6) is provided with a plurality of ventilating channels (61) along the radial direction.

4. The wind turbine generator of claim 1, wherein:

a gap is arranged between the stator core (4) and the inner wall of the hood shell (9).

5. The wind turbine generator of claim 1, wherein:

a front end cover (2) and a rear end cover (10) are respectively arranged at two ends of the hood shell (9); the front end cover (2) and the rear end cover (10) are respectively provided with a plurality of air inlet holes (21).

6. The wind turbine generator of claim 1, wherein:

and the power end of the axial flow fan (5) is electrically connected with the power output end of the generator.

7. The generator with a wind turbine according to claim 1 or 2, characterized in that:

the air outlet window (1) is symmetrically arranged on two sides of the middle part of the hood shell (9), a protection plate (11) is arranged at the air outlet of the air outlet window (1), and a plurality of air outlet holes (12) are formed in the protection plate (11).

8. The wind turbine generator of claim 3, wherein:

a stator winding (3) is embedded in the stator core (4), and a rotor winding (8) is wound on the rotor core (7); the number of the ventilation channels (61) is matched with the number of the stator windings (3) and the number of the rotor windings (8).

9. The generator with a wind turbine according to claim 1 or 2, characterized in that:

a gap is arranged between the rotor core (7) and the stator core (4), and the rotor core (7) is provided with a notch (41).