Power generation structure

Abstract

The invention provides a power generation structure which comprises a first fan, the first fan is provided with a hub, a main shaft arranged on the rear side of the hub and synchronously rotating along with the hub and a plurality of blades arranged on the hub, the blades are arranged on the hub at intervals in the circumferential direction of the hub, an air inlet channel is formed in the hub, the air inlet channel is provided with an air inlet end and an air outlet end, and the air inlet end is communicated with the air outlet end; the air inlet end of the air inlet channel penetrates through the outer surface of the hub; the main shaft is sleeved with the first generator, and the main shaft drives the first generator to generate electricity when rotating; the drainage channel is provided with an air inlet end and an air outlet end, and the air inlet end of the drainage channel is communicated with the air outlet end of the air inlet channel; the second fan is arranged opposite to the air outlet end of the drainage channel and can be driven by the air in the drainage channel to rotate; and the second generator is driven to generate electricity when the second fan rotates. According to the technical scheme, the problem that the wind energy utilization rate of a single hub of a wind driven generator and blades on the hub in the prior art is limited can be effectively solved.

Description

Technical Field

[0001] The present invention relates to the technical field of wind power generation, and in particular to a power generation structure. Background Art

[0003] The two most common wind turbines in use today are wind rotor mechanisms and vertical axis wind turbines, of which the wind rotor mechanism is the most widely used.

[0004] In order to improve the utilization of wind energy, the improvement of wind rotor mechanism in the prior art mainly focuses on two aspects:

[0005] 1. Increase the number of blades or improve the blade structure to increase the torque and better convert wind energy into mechanical energy.

[0006] 2. Add multiple hubs. For example, in a coaxial multi-hub wind turbine, two or more hubs with blades are connected to the same main shaft (rotating shaft) to drive the same generator together; or, two or more hubs with blades are installed on different rotating shafts, each rotating shaft is independent of each other but forms a concentric shaft, which can drive the same or multiple generators.

[0007] At present, the utilization of wind energy by wind turbines mainly relies on the interaction between wind and blades. The wind drives the blades to rotate and converts wind energy into mechanical energy and then into electrical energy. The above-mentioned methods of improving the utilization of wind energy are all by increasing the number of hubs or blades, but the utilization rate of wind energy by a single hub and its blades is still limited. Summary of the invention

[0008] The main purpose of the present invention is to provide a power generation structure to solve the problem of limited utilization of wind energy by a single hub of a wind turbine and blades thereon in the related art.

[0009] In order to achieve the above-mentioned purpose, the present invention provides a power generation structure, including: a first fan, having a hub, a main shaft arranged at the rear side of the hub and rotating synchronously with the hub, and a plurality of blades arranged on the hub, the plurality of blades are arranged at intervals in the circumferential direction of the hub, and an air inlet channel is arranged on the hub, the air inlet channel has an air inlet end and an air outlet end, and the air inlet end of the air inlet channel passes through the outer surface of the hub; a first generator, which is sleeved on the main shaft, and drives the first generator to generate electricity when the main shaft rotates; a drainage channel, which has an air inlet end and an air outlet end, and the air inlet end of the drainage channel is connected to the air outlet end of the air inlet channel; a second fan, which is arranged opposite to the air outlet end of the drainage channel and can be driven to rotate by the gas in the drainage channel; a second generator, which is arranged at the rear side of the second fan, and drives the second generator to generate electricity when the second fan rotates.

[0010] Furthermore, the drainage channel penetrates the main shaft in the axial direction, and the second fan is arranged on the rear side of the main shaft.

[0011] Furthermore, the power generation structure also includes a first air box and a first drainage pipe. The first air box is mounted on the main shaft and is rotatably connected to the main shaft so that the main shaft can rotate in the first air box. The first drainage pipe is connected to the first air box. The drainage channel includes a first channel section arranged in the main shaft, a second channel section arranged in the first air box, and a third channel section arranged in the first drainage pipe. A connecting port connecting the first channel section and the second channel section is arranged on the main shaft. The second fan is arranged at the free end of the first drainage pipe. The first air box is located between the hub and the first generator.

[0012] Furthermore, a rotating seal is provided between the main shaft and the first air box.

[0013] Furthermore, the power generation structure also includes a drainage sleeve, a second air box and a second drainage pipe. The drainage sleeve is sleeved on the outside of the main shaft, the second drainage pipe is connected to the second air box, the drainage channel includes a fourth channel section formed between the main shaft and the drainage sleeve, a fifth channel section arranged in the second air box, and a sixth channel section arranged in the second drainage pipe. The second air box is arranged at the rear end of the drainage sleeve and is connected to the fourth channel section. The second fan is arranged at the free end of the second drainage pipe. The main shaft extends rearward from the second air box and is rotatably connected to the second air box so that the main shaft can rotate in the second air box. The second air box is located between the wheel hub and the first generator.

[0014] Furthermore, the air inlet end of the air inlet channel has a guide section, and the cross-sectional area of ​​the guide section gradually increases in a direction approaching the outer surface of the hub.

[0015] Furthermore, the power generation structure also includes an air guide cover arranged at the air outlet end of the drainage channel, and the ratio between the diameter of the air guide cover and the outer diameter of the second fan is greater than or equal to 0.9 and less than or equal to 1.1.

[0016] Furthermore, a plurality of air inlet channels are arranged on the hub, and the air inlet ends of the plurality of air inlet channels and the plurality of blades are staggered in the circumferential direction of the hub.

[0017] Furthermore, the power generation structure also includes an airflow acceleration member arranged in the middle part or at the air outlet end of the guide channel.

[0018] Furthermore, the power generation structure also includes a chassis, and the first generator, the second fan and the second generator are all arranged in the chassis.

[0019] According to the technical solution of the present invention, the power generation structure includes a first fan and a first generator. The blades of the first fan can be driven by wind to rotate, thereby driving the hub and the main shaft of the first fan to rotate with the blades. The first generator is sleeved on the main shaft, and the main shaft drives the first generator to generate electricity when the main shaft rotates. The power generation structure also includes an air inlet channel, a drainage channel, a second fan and a second generator. The air inlet channel is arranged on the hub, and the wind acting on the hub and the partial tail flow of the wind that drives the blades to rotate can flow into the air inlet channel through the air inlet end located on the hub. The drainage channel is connected to the air inlet channel and can collect and guide the air flow in the air inlet channel. The second fan is arranged relative to the air outlet end of the drainage channel and can be driven by the gas in the drainage channel to rotate. When the second fan rotates, it drives the second generator to generate electricity, thereby realizing the use of the partial tail flow of the wind acting on the hub and the wind that drives the blades to rotate to generate additional electricity, that is, improving the wind energy utilization rate of a single fan. Therefore, the technical solution of the present application can effectively solve the problem of limited utilization of wind energy by a single hub and its blades in the related art. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0021] Figure 1 A schematic diagram of a three-dimensional structure of a first embodiment of a power generation structure according to the present invention is shown;

[0022] Figure 2 Shows Figure 1 A schematic diagram of the three-dimensional structure of the power generation structure without the chassis;

[0023] Figure 3 Shows Figure 1 A schematic cross-sectional view of a hub and a main shaft of a power generation structure;

[0024] Figure 4 It shows a schematic diagram of the three-dimensional structure of the second embodiment of the power generation structure according to the present invention without the chassis;

[0025] Figure 5 It shows a three-dimensional structural schematic diagram of the third embodiment of the power generation structure according to the present invention without the chassis;

[0026] Figure 6 It shows a schematic diagram of the three-dimensional structure of the fourth embodiment of the power generation structure according to the present invention without the chassis;

[0027] Figure 7 Shows Figure 6 A schematic cross-sectional view of a hub, a main shaft, a guide sleeve and a second air box of a power generation structure;

[0028] Figure 8 A schematic three-dimensional structure diagram of a hub and blades of a fifth embodiment of a power generation structure according to the present invention is shown.

[0029] The above drawings include the following reference numerals:

[0030] 100. air inlet channel; 101. guide section;

[0031] 200, drainage channel; 201, fourth channel section;

[0032] 10. First fan; 11. Hub; 12. Main shaft; 13. Blades;

[0033] 20. The first generator;

[0034] 30. Second fan;

[0035] 40. Second generator;

[0036] 51. a first air box; 52. a first drainage pipe;

[0037] 61. drainage sleeve; 62. second air box; 63. second drainage tube;

[0038] 70. Air guide hood;

[0039] 80. Airflow acceleration component;

[0040] 90. Chassis. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0043] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0044] Figures 1 to 3 A schematic structural diagram of a first embodiment of a power generation structure according to the present application is shown.

[0045] like Figures 1 to 3 As shown, the present application provides a power generation structure. An embodiment of the power generation structure of the present application includes: a first wind fan 10 , a first generator 20 , a drainage channel 200 , a second wind fan 30 and a second generator 40 . Among them, the first fan 10 has a hub 11, a main shaft 12 arranged at the rear side of the hub 11 and rotating synchronously with the hub 11, and a plurality of blades 13 arranged on the hub 11, the plurality of blades 13 are arranged at intervals in the circumferential direction of the hub 11, and an air inlet channel 100 is arranged on the hub 11, the air inlet channel 100 has an air inlet end and an air outlet end, and the air inlet end of the air inlet channel 100 passes through the outer surface of the hub 11; the first generator 20 is sleeved on the main shaft 12, and when the main shaft 12 rotates, the first generator 20 is driven to generate electricity; the drainage channel 200 has an air inlet end and an air outlet end, and the air inlet end of the drainage channel 200 is connected to the air outlet end of the air inlet channel 100; the second fan 30 is arranged opposite to the air outlet end of the drainage channel 200 and can be driven to rotate by the gas in the drainage channel 200; the second generator 40 is arranged at the rear side of the second fan 30, and when the second fan 30 rotates, it drives the second generator 40 to generate electricity.

[0046] Applying the technical solution of this embodiment, the power generation structure includes a first wind turbine 10 and a first generator 20. The blades 13 of the first wind turbine 10 can be driven by wind force to rotate, thereby driving the hub 11 and the main shaft 12 of the first wind turbine 10 to rotate along with the blades 13. The first generator 20 is mounted on the main shaft 12, and when the main shaft 12 rotates, it drives the first generator 20 to generate electricity. The power generation structure also includes an air inlet channel 100, a drainage channel 200, a second fan 30 and a second generator 40. The air inlet channel 100 is arranged on the hub 11. The wind acting on the hub 11 and part of the tail flow of the wind that drives the blades 13 to rotate can flow into the air inlet channel 100 through the air inlet end located on the hub 11. The drainage channel 200 is connected to the air inlet channel 100 and can collect and guide the airflow in the air inlet channel 100. The second fan 30 is arranged opposite to the air outlet end of the drainage channel 200 and can be driven to rotate by the gas in the drainage channel 200. When the second fan 30 rotates, it drives the second generator 40 to generate electricity, thereby realizing the use of part of the tail flow of the wind acting on the hub 11 and the wind that drives the blades 13 to rotate to generate additional electricity, that is, improving the wind energy utilization rate of a single fan. Therefore, the technical solution of this embodiment can effectively solve the problem of limited utilization of wind energy by a single hub and its blades in the related art.

[0047] It should be noted that the first wind turbine 10 and the first generator 20 in this embodiment are existing structures in the existing wind power generation structure. In this embodiment, an air inlet channel 100, a drainage channel 200, a second wind turbine 30 and a second generator 40 are added on the basis of the first wind turbine 10 and the first generator 20, and the wind energy utilization rate of a single wind turbine is mentioned. Since the second wind turbine 30 and the second generator 40 are the wind energy missed or used by the first wind turbine 10, the power generation efficiency of the second wind turbine 30 and the second generator 40 is less than the power generation efficiency of the first wind turbine 10 and the first generator 20, that is, the first generator 20 is the main generator and the second generator 40 is the auxiliary generator. Among them, the main shaft 12 drives the first generator 20 to generate electricity in a way that the main shaft 12 directly drives the first generator 20 to generate electricity, or the main shaft 12 is connected to a gear box, and the gear box drives the first generator 20 to generate electricity. The second generator 40 includes but is not limited to a small horizontal-axis wind turbine, a small vertical-axis wind turbine, and a turbine generator. A small wind turbine with a suitable power generation capacity can be selected according to the size of the airflow.

[0048] like Figure 1 As shown, the cross-sectional area of ​​the hub 11 gradually increases from the front to the back. Specifically, the hub 11 may be a cone, a truncated cone, or a cylinder with a gradually increasing radius. The front side of the hub 11 refers to Figure 1 The lower right side of the middle hub 11, the rear side of the hub 11 refers to Figure 1The upper left side of the middle hub 11.

[0049] like Figure 2 and Figure 3 As shown, in this embodiment, the drainage channel 200 penetrates the main shaft 12 in the axial direction, and the second fan 30 is arranged at the rear side of the main shaft 12. The drainage channel 200 is formed inside the main shaft 12 and penetrates the main shaft 12, which has the advantage of simple structure. Figure 3 The left end of the middle drainage channel 200 forms an air inlet end, and the right end forms an air outlet end.

[0050] The technical solution of this embodiment is applied, and the power generation structure is a horizontal axis wind power generation device. When the wind (airflow) flows through the blades 13 and drives the blades 13 to rotate, the wake left behind still has a certain amount of kinetic energy. The wake, especially the wake near the hub 11, can enter the diversion channel 200 in the main shaft 12 through the air inlet channel 100 with an air inlet end, and the airflow then flows out from the air outlet end of the diversion channel 200 to drive a small wind turbine (that is, the second generator 40) to generate electricity. The horizontal axis wind power generation device of this embodiment can utilize part of the wake after the blades 13 act on the wind, and in particular, can utilize the wake near the hub 11. It should be noted that the above-mentioned "wake" refers to the airflow after the wind passes through the blades 13 and acts on the blades 13.

[0051] It should be noted that when describing the present application, the “windward side of the blade 13” used refers to the side before the wind passes through the blade 13, and the “leeward side of the blade 13” used refers to the side after the wind passes through the blade 13. Preferably, the air inlet end of the air inlet channel 100 is located on the leeward side of the blade 13.

[0052] like Figure 3 As shown, the air inlet end of the air inlet channel 100 has a guide section 101, and the cross-sectional area of ​​the guide section 101 gradually increases in the direction close to the outer surface of the hub 11. The cross-sectional area of ​​the outer end of the guide section 101 is larger, and more wind energy can be collected.

[0053] like Figure 1 As shown, the power generation structure also includes a chassis 90, and the first generator 20, the second fan 30 and the second generator 40 are all arranged in the chassis 90. The chassis 90 can protect the first generator 20, the second fan 30 and the second generator 40. Among them, the chassis 90 is provided with an exhaust port, and the airflow flowing out of the outlet end of the guide channel 200 can be discharged through the exhaust port after passing through the second fan 30. Of course, in an embodiment not shown in the figure, the second fan and the second generator can also be arranged outside the chassis.

[0054] Furthermore, a switch structure may be provided at the air inlet end of the air inlet channel 100 , so as to open or close the air inlet end of the air inlet channel 100 according to actual conditions.

[0055] Figure 4 The schematic diagram of the structure of the second embodiment of the power generation structure according to the present application is shown. The following mainly describes the parts of the second embodiment that are different from the first embodiment in conjunction with the drawings, and the same parts of the two embodiments are not repeated.

[0056] Specifically, Figure 4 As shown, the power generation structure also includes an air guide cover 70 disposed at the air outlet end of the guide channel 200, and the ratio between the diameter of the air guide cover 70 and the outer diameter of the second fan 30 is greater than or equal to 0.9 and less than or equal to 1.1. The arrangement of the air guide cover 70 makes the diameter of the air guide cover 70 equal to the outer diameter of the second fan 30, and thus makes the flow area of ​​the gas flowing out of the air guide cover 70 equal to the outer diameter of the second fan 30, so that the gas flowing out of the air guide cover 70 can act on the outer end of the second fan 30 as much as possible, ensuring the utilization efficiency of this part of the wind energy. Preferably, the ratio between the diameter of the air guide cover 70 and the outer diameter of the second fan 30 can be 0.9, 1.0 or 1.1.

[0057] The above-mentioned "caliber of the air guide cover 70" refers to Figure 4 The diameter of the right end of the middle air guide cover 70 , and the above-mentioned “outer diameter of the second fan 30 ” refer to the diameter of the circle surrounded by the outer ends of the plurality of blades of the second fan 30 .

[0058] Figure 5 The schematic diagram of the structure of the third embodiment of the power generation structure according to the present application is shown. The following mainly describes the parts of the third embodiment that are different from the first embodiment in conjunction with the accompanying drawings, and the same parts of the two embodiments are not repeated.

[0059] like Figure 5As shown, the power generation structure also includes a first air box 51 and a first drainage pipe 52. The first air box 51 is sleeved on the main shaft 12 and is rotatably connected to the main shaft 12 so that the main shaft 12 can rotate in the first air box 51. The first drainage pipe 52 is connected to the first air box 51. The drainage channel 200 includes a first channel section arranged in the main shaft 12, a second channel section arranged in the first air box 51, and a third channel section arranged in the first drainage pipe 52. The main shaft 12 is provided with a connecting port connecting the first channel section and the second channel section. The second fan 30 is arranged at the free end of the first drainage pipe 52. The first air box 51 is located between the wheel hub 11 and the first generator 20. Specifically, in this embodiment, the first drainage pipe 52 is arranged perpendicular to the main shaft 12. The airflow flowing out of the air inlet channel 100 flows through the first channel section, the second channel section and the third channel section in sequence to the second fan 30. The above arrangement realizes that the second fan 30 and the second generator 40 are arranged on the side of the main shaft 12, and the space on the side of the main shaft 12 is fully utilized.

[0060] Specifically, since the main shaft 12 rotates with the hub 11, if the second fan 30 is directly set at the outlet end of the main shaft 12, that is, the air outlet will also rotate, and the direction of the airflow flowing out of the air outlet will be constantly changed, so that the airflow directly acting on the second fan 30 is not effective. In this embodiment, the first air box 51 is a sealed air box, which can play the role of airflow transfer. Specifically, the airflow flowing out of the air outlet on the main shaft 12 passes through the enclosed space of the first air box and is led into the first guide pipe 52. Among them, the shape of the first air box 51 can be cylindrical, rectangular, cube, or other shapes, and the present application does not limit this.

[0061] Specifically, a bearing may be provided between the main shaft 12 and the first air box 51 , and the main shaft 12 and the first air box 51 are rotationally connected via the bearing.

[0062] Specifically, in this embodiment, a rotating seal is provided between the main shaft 12 and the first air box 51. The rotating seal is provided to prevent gas from flowing out from between the main shaft 12 and the first air box 51 on the basis of ensuring that the main shaft 12 can rotate in the first air box 51, thereby ensuring that wind energy can act on the second fan 30 as much as possible.

[0063] like Figure 5 As shown, the power generation structure further includes an airflow accelerator 80 disposed in the middle or at the outlet end of the guide channel 200. The airflow accelerator 80 can accelerate the airflow passing through the guide channel 200, thereby causing the airflow to act on the second fan 30 at a higher rate.

[0064] Of course, the airflow accelerator can also be a Venturi structure or a Venturi fan. Specifically, the Venturi structure or the Venturi fan is used as the first drainage pipe, one end of the Venturi structure or the Venturi fan is connected to the first air box, and the other end of the Venturi structure or the Venturi fan is opposite to the second fan or the second fan is arranged inside the Venturi structure.

[0065] Specifically, in the present embodiment, the airflow acceleration member 80 is a structure that gradually tapers in the flow direction of the airflow, thereby increasing the flow velocity of the airflow by reducing the flow area of ​​the airflow.

[0066] Figure 6 and Figure 7 The schematic diagram of the structure of the fourth embodiment of the power generation structure according to the present application is shown. The following mainly describes the parts of the fourth embodiment that are different from the first embodiment in conjunction with the drawings, and the same parts of the two embodiments are not repeated.

[0067] like Figure 6 and Figure 7 As shown, the power generation structure also includes a drainage sleeve 61, a second air box 62 and a second drainage pipe 63. The drainage sleeve 61 is sleeved on the outside of the main shaft 12, and the second drainage pipe 63 is connected to the second air box 62. The drainage channel 200 includes a fourth channel section 201 formed between the main shaft 12 and the drainage sleeve 61, a fifth channel section arranged in the second air box 62, and a sixth channel section arranged in the second drainage pipe 63. The second air box 62 is arranged at the rear end of the drainage sleeve 61 and is connected to the fourth channel section 201. The second fan 30 is arranged at the free end of the second drainage pipe 63. The main shaft 12 extends backward from the second air box 62 and is rotatably connected to the second air box 62 so that the main shaft 12 can rotate in the second air box 62. The second air box 62 is located between the hub 11 and the first generator 20. Specifically, in this embodiment, the second guide tube 63 is arranged perpendicular to the main shaft 12, and the airflow flowing out of the air inlet channel 100 flows through the fourth channel section 201, the fifth channel section and the sixth channel section in sequence to the second fan 30. The above arrangement realizes the arrangement of the second fan 30 and the second generator 40 on the side of the main shaft 12, making full use of the space on the side of the main shaft 12. In addition, the guide sleeve 61 is sleeved on the outside of the main shaft 12, and the fourth channel section 201 is formed between the main shaft 12 and the guide sleeve 61, and there is no need to improve the structure of the main shaft 12.

[0068] In this embodiment, the fourth channel section 201 is formed between the main shaft 12 and the drainage sleeve 61. Of course, in an embodiment not shown in the figure, the drainage sleeve can also be set as a double-layer sleeve, and the fourth channel is formed between the double-layer sleeves.

[0069] Specifically, a bearing may be provided between the main shaft 12 and the second air box 62 , and the main shaft 12 and the second air box 62 are rotationally connected via the bearing.

[0070] Figure 8 The schematic diagram of the structure of the fifth embodiment of the power generation structure according to the present application is shown. The following mainly describes the parts of the fifth embodiment that are different from the first embodiment in conjunction with the drawings, and the same parts of the two embodiments are not repeated.

[0071] like Figure 8 As shown, the hub 11 is provided with a plurality of air inlet channels 100, and the air inlet ends of the plurality of air inlet channels 100 are staggered with the plurality of blades 13 in the circumferential direction of the hub 11. The air outlet ends of the plurality of air inlet channels 100 are all connected with the guide channel 200, so that the air inlet ends of the air inlet channels 100 and the blades 13 are staggered in the circumferential direction of the hub 11, which can prevent the blades 13 from blocking the air inlet ends of the air inlet channels 100.

[0072] like Figure 8 As shown, in this embodiment, two groups of blades 13 are arranged on the hub 11, each group of blades 13 includes a plurality of blades 13 arranged at intervals in the circumferential direction of the hub 11, and the two groups of blades 13 are arranged at intervals in the axial direction of the main shaft 12. Correspondingly, two groups of air inlet channels 100 are also arranged on the hub 11, and the air inlet ends of the two groups of air inlet channels 100 are respectively located at the rear sides of the two groups of blades 13, and each blade 13 is respectively provided with an air inlet end of the air inlet channel 100 on both sides along the circumferential wind direction. The two groups of blades 13 and the air inlet ends of the two groups of air inlet channels 100 are staggered in the axial direction of the hub 11. Compared with the first embodiment, in this embodiment, by setting two groups of blades 13, the wake formed by the two groups of blades 13 can provide a more stable and sufficient airflow for the air inlet channel 100. Of course, in the embodiment not shown in the figure, the number of blade groups can also be more, for example, it can be 3 or 4 groups.

[0073] Each group of blades 13 includes 2 to 4 blades 13, and the 2 to 4 blades 13 are evenly arranged along the circumferential direction of the hub 11. Preferably, each group of blades 13 includes 3 blades. The angle difference between the projections of two corresponding blades 13 in the two groups of blades 13 on the end surface of the hub 11 is greater than or equal to 25° and less than or equal to 65°, preferably greater than or equal to 30° and less than or equal to 60°, and specifically can be 30°, 45° or 60°.

[0074] When three groups of blades are arranged on the hub, the angle difference between the projections of two corresponding blades in two adjacent groups of blades on the end face of the hub is greater than or equal to 25° and less than or equal to 45°, and can be set to 25°, 30° or 45° according to the situation.

[0075] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0076] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0077] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0078] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A power generation structure, characterized in that: include: A first fan (10) comprises a hub (11), a main shaft (12) arranged at the rear side of the hub (11) and rotating synchronously with the hub (11), and a plurality of blades (13) arranged on the hub (11), wherein the plurality of blades (13) are arranged at intervals in the circumferential direction of the hub (11), and an air inlet channel (100) is arranged on the hub (11), wherein the air inlet channel (100) has an air inlet end and an air outlet end, and the air inlet end of the air inlet channel (100) passes through the outer surface of the hub (11); A first generator (20) is sleeved on the main shaft (12), and when the main shaft (12) rotates, the first generator (20) is driven to generate electricity; A drainage channel (200) having an air inlet end and an air outlet end, wherein the air inlet end of the drainage channel (200) is connected to the air outlet end of the air inlet channel (100); a second fan (30), arranged opposite to the gas outlet end of the drainage channel (200) and capable of rotating when driven by the gas in the drainage channel (200); The second generator (40) is arranged at the rear side of the second fan (30), and when the second fan (30) rotates, it drives the second generator (40) to generate electricity.

2. The power generation structure according to claim 1, characterized in that: The drainage channel (200) penetrates the main shaft (12) in the axial direction, and the second fan (30) is arranged on the rear side of the main shaft (12).

3. The power generation structure according to claim 1, characterized in that: The power generation structure further comprises a first air box (51) and a first drainage pipe (52); the first air box (51) is sleeved on the main shaft (12) and is rotatably connected to the main shaft (12) so that the main shaft (12) can rotate in the first air box (51); the first drainage pipe (52) is communicated with the first air box (51); the drainage channel (200) comprises a first channel section arranged in the main shaft (12), a second channel section arranged in the first air box (51) and a third channel section arranged in the first drainage pipe (52); a connecting port connecting the first channel section and the second channel section is arranged on the main shaft (12); the second fan (30) is arranged at the free end of the first drainage pipe (52); the first air box (51) is located between the wheel hub (11) and the first generator (20).

4. The power generation structure according to claim 3, characterized in that: A rotating seal is provided between the main shaft (12) and the first air box (51).

5. The power generation structure according to claim 1, characterized in that: The power generation structure further comprises a drainage sleeve (61), a second air box (62) and a second drainage pipe (63); the drainage sleeve (61) is sleeved on the outside of the main shaft (12); the second drainage pipe (63) is communicated with the second air box (62); the drainage channel (200) comprises a fourth channel section (201) formed between the main shaft (12) and the drainage sleeve (61), a fifth channel section arranged in the second air box (62) and a sixth channel section arranged in the second drainage pipe (63); The second air box (62) is arranged at the rear end of the drainage sleeve (61) and is connected to the fourth channel section (201), the second fan (30) is arranged at the free end of the second drainage pipe (63), the main shaft (12) extends backward from the second air box (62) and is rotatably connected to the second air box (62) so that the main shaft (12) can rotate in the second air box (62), and the second air box (62) is located between the wheel hub (11) and the first generator (20).

6. The power generation structure according to any one of claims 1 to 5, characterized in that: The air inlet end of the air inlet channel (100) has a guide section (101), and the cross-sectional area of ​​the guide section (101) gradually increases in a direction approaching the outer surface of the hub (11).

7. The power generation structure according to any one of claims 1 to 5, characterized in that: The power generation structure further comprises an air guide cover (70) arranged at the air outlet end of the drainage channel (200), and the ratio between the diameter of the air guide cover (70) and the outer diameter of the second fan (30) is greater than or equal to 0.9 and less than or equal to 1.

1.

8. The power generation structure according to any one of claims 1 to 5, characterized in that: A plurality of air inlet channels (100) are arranged on the wheel hub (11), and air inlet ends of the plurality of air inlet channels (100) and the plurality of blades (13) are staggered in the circumferential direction of the wheel hub (11).

9. The power generation structure according to any one of claims 1 to 5, characterized in that: The power generation structure further comprises an airflow acceleration member (80) arranged in the middle portion or at the air outlet end of the flow guide channel (200).

10. The power generation structure according to any one of claims 1 to 5, characterized in that: The power generation structure further comprises a machine case (90), and the first generator (20), the second fan (30) and the second generator (40) are all arranged in the machine case (90).

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