Axial flow ventilation and heat dissipation device of generator

Abstract

The invention discloses a generator axial flow ventilation heat dissipation device, and relates to the technical field of wind power generation equipment. The device comprises a mounting shell and a supporting disc which are respectively and coaxially corresponding to a generator main shaft, the mounting shell and the supporting disc are located outside the two ends of the generator spindle respectively. An axial flow fan is correspondingly mounted in the mounting shell; a plurality of air inlets are formed in the end, away from the generator shell, of the mounting shell, and an air guide ring is coaxially fixed to the end, close to the generator shell, of the mounting shell; the air guide ring is correspondingly communicated with the mounting shell; a plurality of transmission pipes are evenly distributed at the end, close to the generator shell, of the air guide ring in the circumferential direction. The transmission pipe fixedly penetrates through one end of the generator shell in a sealed mode in the direction parallel to the main shaft of the generator and penetrates through a gap between a stator and a rotor of the generator. The generator cooling device has the beneficial effects that the interior of a generator can be directly cooled, heat in the generator is efficiently taken away, and the cooling effect is greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of wind power generation equipment, and in particular to an axial flow ventilation and heat dissipation device for a generator. Background Art

[0002] The main body of the generator is the core equipment of the wind turbine. The power generation principle of the wind turbine is simply to drive the blades to rotate through the external wind force, and then drive the main shaft of the generator to rotate to complete the power generation. When the generator is working, the loss of the stator and rotor will generate heat. Since the wind turbine is working continuously for a long time, if the heat dissipation is not carried out in time to keep the working temperature of the generator within a reasonable range, it will easily affect the normal operation of the generator. On the contrary, if the generator can maintain a suitable temperature, it will help reduce the aging of insulation materials, deformation of windings and other problems, thereby improving the power generation efficiency and extending the service life of the generator.

[0003] Current heat dissipation devices usually dissipate heat and cool the generator body externally. However, due to the insulation of the generator casing, the heat on the stator and rotor is difficult to be effectively removed, resulting in unsatisfactory actual heat dissipation effect. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide an axial flow ventilation and heat dissipation device for a generator in view of the above-mentioned technical deficiencies, which can directly dissipate the heat inside the generator, efficiently take away the heat inside the generator, and greatly improve the heat dissipation effect.

[0005] The technical solution adopted by the present invention is: to provide an axial flow ventilation and heat dissipation device for a generator, comprising a mounting shell and a support plate respectively coaxially corresponding to the main shaft of the generator; the mounting shell and the support plate are respectively located on the outer sides of the two ends of the main shaft of the generator; an axial flow fan is correspondingly installed inside the mounting shell; a plurality of air inlets are opened on the end of the mounting shell away from the generator housing, and an air guide ring is coaxially fixed on the end of the mounting shell close to the generator housing; the air guide ring is correspondingly connected to the mounting shell; a plurality of transmission pipes are evenly distributed along the circumferential direction on the end of the air guide ring close to the generator housing; the transmission pipe is fixedly sealed and passes through one end of the generator housing in a direction parallel to the main shaft of the generator, and passes through the gap between the stator and the rotor of the generator; a sliding plug is coaxially sealed and fixed on the end of the transmission pipe away from the air guide ring; an exhaust hole is opened on the end of the outer wall of the transmission pipe close to the sliding plug;

[0006] The support plate has a plurality of guide tubes evenly distributed along the circumferential direction at one end close to the generator housing; the guide tube slides and seals through one end of the generator housing in a direction parallel to the generator main shaft; the guide tubes are sleeved on the outside of the transmission tube in a one-to-one correspondence; the sliding plug slides and seals against the inner wall of the guide tube in a one-to-one correspondence; a heat dissipation ring is provided in the gap between the stator and the rotor of the generator; the heat dissipation ring corresponds coaxially to the generator main shaft; the end of the guide tube away from the support plate is fixedly connected to the heat dissipation ring; a plurality of air outlet holes are opened on the heat dissipation ring in the circumferential direction; the transmission tube slides and seals through the heat dissipation ring; the support plate is driven by a driver to move along the axial direction of the generator main shaft.

[0007] To further optimize the technical solution, the air outlet holes of the generator axial flow ventilation and heat dissipation device are respectively opened on the heat dissipation ring on a side close to the stator and a side close to the rotor.

[0008] To further optimize the technical solution, the sliding plug of the generator axial flow ventilation and heat dissipation device is lubricatedly connected to the inner wall of the guide tube.

[0009] To further optimize the technical solution, a filter sleeve is filled in the air guide ring of the generator axial flow ventilation and heat dissipation device.

[0010] The beneficial effects of the present invention are:

[0011] 1. The axial flow fan can stably and continuously input axial airflow into the air guide ring, so that the airflow can continuously enter the transmission pipe. A sliding plug is coaxially sealed and fixed on the end of the transmission pipe away from the air guide ring. An exhaust hole is opened on the end of the outer wall of the transmission pipe close to the sliding plug. The sliding plug and the inner wall of the guide pipe are sealed and slid one by one, so that the airflow sent by the axial flow fan can be blown into the guide pipe from the exhaust hole on the transmission pipe. And because the guide pipe is connected with the heat dissipation ring, and the heat dissipation ring is provided with an air outlet hole, the axial airflow generated by the axial flow fan can finally be blown out from the air outlet hole and act on the inside of the generator housing, achieving the effect of directly dissipating the heat inside the generator housing.

[0012] 2. The transmission pipe and the guide pipe are sealed and penetrated into the generator housing in a direction parallel to the generator main shaft. The heat dissipation ring is coaxial with the generator main shaft and is arranged between the stator and the rotor, thereby avoiding the existence of these components affecting the normal rotation of the rotor.

[0013] 3. The sliding plug slides in a sealed manner with the inner wall of the guide tube, and the support plate is driven to move along the direction of the generator main shaft, which can change the axial position of the heat dissipation ring relative to the generator main shaft, thereby changing the blowing position inside the generator housing, dissipating heat more accurately, and ensuring local heat dissipation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the present invention;

[0015] Figure 2 for Figure 1 Schematic diagram of the local structure.

[0016] In the figure, 1. generator main shaft; 2. generator housing; 3. stator; 4. rotor; 5. mounting shell; 6. support plate; 7. axial flow fan; 8. air inlet; 9. air guide ring; 10. transmission pipe; 11. sliding plug; 12. exhaust hole; 13. guide pipe; 14. heat dissipation ring; 15. air outlet; 16. driver; 17. filter sleeve. DETAILED DESCRIPTION

[0017] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0018] like Figure 1-2 As shown, the generator axial flow ventilation and heat dissipation device comprises a mounting shell 5 and a support plate 6 which are respectively coaxially corresponding to the generator main shaft 1; the mounting shell 5 and the support plate 6 are respectively located at the outer sides of the two ends of the generator main shaft 1; an axial flow fan 7 is correspondingly installed inside the mounting shell 5; a plurality of air inlets 8 are opened on the end of the mounting shell 5 away from the generator housing 2, and an air guide ring 9 is coaxially fixed on the end of the mounting shell 5 close to the generator housing 2; the air guide ring 9 is correspondingly connected to the mounting shell 5; a plurality of transmission pipes 10 are evenly distributed along the circumferential direction on the end of the air guide ring 9 close to the generator housing 2; the transmission pipe 10 is fixedly sealed and passes through one end of the generator housing 2 in a direction parallel to the generator main shaft 1, and passes through the gap between the stator 3 and the rotor 4 of the generator; a sliding plug 11 is coaxially sealed and fixed on the end of the transmission pipe 10 away from the air guide ring 9; an exhaust hole 12 is opened on the end of the outer wall of the transmission pipe 10 close to the sliding plug 11;

[0019] A plurality of guide tubes 13 are evenly distributed along the circumferential direction on one end of the support plate 6 close to the generator housing 2; the guide tube 13 slides and seals through one end of the generator housing 2 in a direction parallel to the generator main shaft 1; the guide tubes 13 are sleeved on the outside of the transmission pipe 10 in a one-to-one correspondence; the sliding plug 11 and the inner wall of the guide tube 13 slide in a one-to-one correspondence and seal; a heat dissipation ring 14 is provided in the gap between the stator 3 and the rotor 4 of the generator; the heat dissipation ring 14 corresponds coaxially to the generator main shaft 1; the end of the guide tube 13 away from the support plate 6 is fixedly connected to the heat dissipation ring 14; a plurality of air outlet holes 15 are opened on the heat dissipation ring 14 in the circumferential direction; the transmission pipe 10 slides and seals through the heat dissipation ring 14; the support plate 6 is driven by the driver 16 to move along the direction of the generator main shaft 1.

[0020] In the present technical solution, the axial airflow provided by the axial flow fan 7 is guided sequentially through the air guide ring 9, the transmission pipe 10, the guide pipe 13 and the heat dissipation ring 14, and directly and accurately acts on the gap between the stator 3 and the rotor 4 of the generator, so as to efficiently cool and dissipate the heat of the interior of the generator housing 2, especially the stator 3 and the rotor 4, and ensure the temperature stability of the generator during long-term operation.

[0021] In addition, due to the large size of the wind turbine, the stator 3 and rotor 4 parts inside it are usually long. If the airflow is directly introduced from one end of the generator housing 2, the heat exchange effect of the airflow will be quickly consumed near the end, resulting in the stator 3 and the rotor 4 being cooled only near the air inlet end, while the slightly farther positions cannot obtain effective cooling effect, so that even if the airflow is directly introduced into the generator housing 2, the ideal heat dissipation effect cannot be achieved.

[0022] In order to avoid the above problems, in the present technical solution, the axial airflow is not blown directly from one end to the other end of the generator housing 2 without being processed, but the airflow enters the heat dissipation ring 14, and then blows out from the air outlet 15 on the heat dissipation ring 14, and passes through the heat dissipation ring 14 set in the gap between the stator 3 and the rotor 4, and then combined with the driver 16 to drive the heat dissipation ring 14 to move along the axial direction of the generator main shaft 1, the airflow can directly reach various positions between the stator 3 and the rotor 4, and the heat exchange capacity will not be consumed due to the airflow passing through other positions in advance. In this way, when the airflow dissipates heat between the stator 3 and the rotor 4, the position far away from the end of the generator housing 2 can be effectively cooled.

[0023] When the airflow introduced by the axial flow fan 7 is blown out from the air outlet 15 on the heat dissipation ring 14, in addition to the above-mentioned effects, due to the aggregation of the airflow by the heat dissipation ring 14, the wind force and air volume blown out of the air outlet 15 can be strengthened, so that the heat dissipation effect of the part directly acted by the wind can be increased. Therefore, although the present application can only dissipate heat for the part near the heat dissipation ring 14 at a time, it seems that the heat dissipation efficiency is sacrificed while improving the heat dissipation effect, but in fact the heat dissipation efficiency is not greatly affected.

[0024] When the generator works continuously for a long time, the driver 16 can be set to drive the heat dissipation ring 14 to continuously reciprocate between the stator 3 and the rotor 4 to ensure a continuous cooling effect. The driver 16 can adopt an electric telescopic device, a telescopic hydraulic cylinder, a transmission screw and other structures, and the specific structure can be selected according to needs.

[0025] Of course, in order to ensure that the heat can be taken away, heat dissipation holes need to be provided on the generator housing 2, which are not directly marked in the drawings because the generator housing 2 itself actually has heat dissipation holes, so there is no need to mark them specifically.

[0026] like Figure 2 As shown, the air outlet holes 15 are respectively opened on the heat dissipation ring 14 on the side close to the stator 3 and the side close to the rotor 4, so as to ensure that the air outlet can act more accurately on the positions of the stator 3 and the rotor 4 respectively.

[0027] The sliding plug 11 is lubricatedly connected to the inner wall of the guide tube 13, so that the sliding between the guide tube 13 and the sliding plug 11 is smoother, the wear of the sliding plug 11 is reduced, and the reliability of long-term operation is ensured.

[0028] like Figure 1-2 As shown, the air guide ring 9 is filled with a filter sleeve 17, which has a dust filtering effect on the air introduced by the axial flow fan 7, thereby improving the air cleanliness and preventing a large amount of dust from accumulating inside the generator housing 2. The filter sleeve 17 and the air guide ring 9 can be detachably connected to facilitate the disassembly, cleaning and maintenance of the filter sleeve 17.

[0029] It is to be understood that the present invention is described by some embodiments, and it is known to those skilled in the art that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.

Claims

1. A generator axial flow ventilation and heat dissipation device, characterized in that: The invention comprises a mounting shell (5) and a support plate (6) which are coaxially corresponding to the main shaft (1) of the generator; the mounting shell (5) and the support plate (6) are respectively located outside the two ends of the main shaft (1) of the generator; an axial flow fan (7) is correspondingly installed inside the mounting shell (5); a plurality of air inlets (8) are opened at one end of the mounting shell (5) away from the generator housing (2); an air guide ring (9) is coaxially fixed at one end of the mounting shell (5) close to the generator housing (2); and the air guide ring (9) is correspondingly connected to the mounting shell (5); A plurality of transmission pipes (10) are evenly distributed along the circumferential direction at one end of the air guide ring (9) close to the generator housing (2); the transmission pipe (10) is fixedly sealed and passes through one end of the generator housing (2) in a direction parallel to the generator main shaft (1), and passes through the gap between the stator (3) and the rotor (4) of the generator; a sliding plug (11) is coaxially sealed and fixed to the end of the transmission pipe (10) away from the air guide ring (9); an exhaust hole (12) is formed at the end of the outer wall of the transmission pipe (10) close to the sliding plug (11); A plurality of guide tubes (13) are evenly distributed along the circumferential direction on one end of the support plate (6) close to the generator housing (2); the guide tube (13) slides and seals through one end of the generator housing (2) in a direction parallel to the generator main shaft (1); the guide tubes (13) are sleeved on the outside of the transmission tube (10) in a one-to-one correspondence; the sliding plug (11) and the inner wall of the guide tube (13) slide in a one-to-one correspondence and seal; a heat dissipation ring (14) is provided in the gap between the stator (3) and the rotor (4) of the generator; the heat dissipation ring (14) corresponds coaxially to the generator main shaft (1); the end of the guide tube (13) away from the support plate (6) is fixedly connected to the heat dissipation ring (14); a plurality of air outlet holes (15) are opened on the heat dissipation ring (14) in a circumferential direction; the transmission tube (10) slides and seals through the heat dissipation ring (14); the support plate (6) is driven by a driver (16) to move along the axial direction of the generator main shaft (1).

2. The generator axial flow ventilation and heat dissipation device according to claim 1 is characterized in that: The air outlet holes (15) are respectively arranged on a side of the heat dissipation ring (14) close to the stator (3) and a side close to the rotor (4).

3. The generator axial flow ventilation and heat dissipation device according to claim 1 is characterized in that: The sliding plug (11) is lubricatedly connected to the inner wall of the guide tube (13).

4. The generator axial flow ventilation and heat dissipation device according to claim 1, characterized in that: The air guide ring (9) is filled with a filter sleeve (17) correspondingly.

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