Distributed power generation vertical axis fan

Abstract

The invention is suitable for the technical field of wind power generation equipment, and provides a distributed power generation vertical shaft fan which comprises a fan support, a main transmission shaft, a fan main shaft base, a wind power detection device and at least one distributed power generation unit. The fan impeller is divided into a spiral impeller structure and a lift-drag composite impeller structure, the distributed power generation unit comprises a power generation device base and a main driving outer gear, the power generation device base is rotationally provided with a plurality of power generation driving gears, and the power generation driving gears are meshed with the main driving outer gear; the power generation driving gear is in driving connection with the distributed generators through the power generation driving shaft, the main transmission shaft drives the main driving outer gear to drive the distributed generators to generate power, the electromagnetic clutch is arranged between the power generation driving shaft and the distributed generators, and the number of the distributed generators connected to the load can be flexibly adjusted according to working conditions. And maximum utilization of energy is realized.

Description

Technical Field

[0001] The invention is applicable to the technical field of wind power generation equipment and provides a distributed power generation vertical axis wind turbine. Background Art

[0002] In the field of wind power generation, it is usually divided into two types according to the placement direction of the blade drive shaft: horizontal axis wind turbines and vertical axis wind turbines. Among them, the impeller drive shaft of the vertical axis wind turbine is generally placed vertically, and there is no need to face the wind when the wind direction changes. This is a major advantage over the horizontal axis wind turbine. It not only simplifies the structural design, but also reduces the gyroscopic force of the wind wheel facing the wind. However, since the blades of the vertical axis wind turbine are always operating in a vertical state, it is necessary to overcome resistance in three vertical directions. Specifically, the blades of the vertical axis wind turbine need to overcome multiple resistances such as gravity, air resistance and friction when starting. In the early stage of the wind turbine starting, the starting resistance from the generator will further aggravate the situation. Therefore, in the design of some wind turbines, the connection between the generator and the wind wheel shaft will be disconnected in the early stage of the wind turbine starting and when the wind force is small and the impeller driving force is insufficient to ensure the starting and continuous rotation of the wind wheel. However, most vertical axis wind turbines are equipped with a generator set, and energy loss will be caused during the disconnection of a single generator set. Summary of the invention

[0003] To this end, the present invention provides a distributed power generation vertical axis wind turbine, which replaces the single large generator set in the traditional design by arranging multiple small distributed generators in the same wind turbine. At the same time, each small distributed generator controls the connection between the generator input shaft and the main drive shaft through an independent electromagnetic clutch, and reduces energy loss by flexibly adjusting the number of small distributed generators connected.

[0004] In order to achieve the above object, the present invention provides the following technical solution: a distributed power generation vertical axis wind turbine, comprising: Fan bracket; A main transmission shaft, the main transmission shaft is rotatably arranged on the fan bracket, and the fan impeller is fixedly mounted on the main transmission shaft; A distributed power generation unit comprises a power generation device base and a main drive external gear, wherein the power generation device base is fixedly connected to the fan bracket, the main drive external gear is fixedly sleeved on the main transmission shaft, the power generation device base is provided with a plurality of power generation drive shafts which are rotated in one circle outside the main drive external gear, the power generation drive shaft is fixedly sleeved with a power generation drive gear, the power generation drive gear is meshedly connected to the main drive external gear, and one end of the power generation drive shaft is drivingly connected to a distributed generator.

[0005] Furthermore, the number of the distributed power generation units is ≥1. When the number of the distributed power generation units is greater than 1, the multiple distributed power generation units are arranged in sequence in the wind turbine support.

[0006] Furthermore, an electromagnetic clutch is provided between one end of the power generation drive shaft and the distributed generator, and the electromagnetic clutch includes a clutch power end and a clutch output end. The clutch power end is drivingly connected to one end of the power generation drive shaft, and the clutch output end is drivingly connected to the input shaft of the distributed generator.

[0007] Furthermore, the distributed power generation unit also includes an auxiliary drive internal gear, which is fixedly sleeved on the main transmission shaft, and the power generation drive gear is meshingly connected with the auxiliary drive internal gear.

[0008] Furthermore, it also includes a fan main shaft base arranged at the bottom of the fan bracket, the fan main shaft base includes an electrical control box, the bottom of the main transmission shaft is rotatably connected to the electrical control box, a fan controller is arranged in the electrical control box, a plurality of battery compartments are evenly distributed on the outside of the electrical control box, a fan energy storage battery is arranged in the battery compartment, and the fan energy storage battery, the distributed generator and the electromagnetic clutch are all electrically connected to the fan controller.

[0009] Furthermore, a wind force detection device is provided on the upper portion of the main transmission shaft, and the wind force detection device is electrically connected to the fan controller.

[0010] Preferably, the fan impeller is a spiral impeller, which includes a plurality of spiral belt-shaped blades evenly arranged on the outside of the main transmission shaft, and the spiral belt-shaped blades are fixedly connected to the main transmission shaft via a plurality of spiral blade connecting plates.

[0011] Preferably, the fan impeller is a lift-drag composite impeller, which includes a plurality of composite impeller connecting plates fixedly connected to the outside of the main transmission shaft, the composite impeller connecting plates being rotatably provided with lift-type blades, and the composite impeller connecting plates being rotatably provided with drag-type blades between the main transmission shaft and the lift-type blades.

[0012] Compared with the prior art, the present invention has the following beneficial effects: In the present invention, multiple miniaturized distributed generators are configured in a distributed power generation unit, and the multiple distributed generators are driven by the main transmission shaft through a gear meshing structure. At the same time, the connection between each distributed generator and the main transmission can be controlled by an electromagnetic clutch. In this way, the number of distributed generators connected to the operation can be flexibly adjusted according to the intensity of the wind force and the stage of the wind wheel operation, so as to achieve more optimized energy utilization. 2. In the present invention, multiple distributed power generation units are stacked vertically to reduce the footprint of the entire power generation device, which is more conducive to the miniaturization of the entire equipment, with more flexible usage scenarios and wider applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic structural diagram of a distributed power generation vertical axis wind turbine mentioned in Example 1; Figure 2 is a schematic structural diagram of the spiral impeller mentioned in Example 1; Figure 3 It is a structural schematic diagram of the fan main shaft base mentioned in the present invention; Figure 4 It is a structural schematic diagram of the distributed power generation unit mentioned in the present invention; Figure 5 A schematic diagram of the structure of a distributed power generation vertical axis wind turbine mentioned in Example 2 Figure 6 Schematic diagram of the structure of the lift-drag composite impeller mentioned in Example 2.

[0014] In the figure: 100. Fan bracket; 200, main drive shaft; 300, spiral impeller, 310, spiral ribbon blade, 320, spiral blade connecting plate; 400, distributed power generation unit, 410, power generation device base, 420, power generation drive shaft, 430, power generation drive gear, 440, main drive external gear, 450, distributed generator, 460, electromagnetic clutch, 470, auxiliary drive internal gear; 500, fan main shaft base, 510, electrical control box, 520, battery compartment; 600. Wind force detection device; 700. lift-drag composite impeller, 710. composite impeller connecting plate, 720. lift-type blade, 730. drag-type blade. DETAILED DESCRIPTION

[0015] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0016] Example 1, refer to the attached Figure 1 The present invention provides a distributed power generation vertical axis wind turbine, including a wind turbine support 100, a main transmission shaft 200, a wind turbine main shaft base 500, a wind force detection device 600 and at least one distributed power generation unit 400; The main transmission shaft 200 is rotatably arranged on the fan bracket 100. In the present embodiment, the main transmission shaft 200 penetrates downward from the upper side of the fan bracket 100 into the inside of the fan bracket 100. In order to ensure the stability of the main transmission shaft 200 during continuous rotation, a plurality of rotation connection points are arranged between the main transmission shaft 200 and the fan bracket 100. The rotation connection points are supported by bearing mechanisms for rotation. The shaft section of the main transmission shaft 200 located above the fan bracket 100 is fixedly installed with a fan impeller. The fan impeller is driven by wind to drive the main transmission shaft 200. 00 rotates, and the main transmission shaft 200 further provides power for the distributed power generation unit 400 to generate electricity. The fan impeller is placed on top to reduce the interference of the fan bracket 100 and other equipment on the wind field, and the wind detection device 600 is arranged above the fan impeller of the main transmission shaft 200. The wind detection device 600 is a prior art and can detect the strength of the wind. The wind detection device 600 is placed at the top to avoid interference with the wind strength detection by other structures. In this embodiment, the fan impeller is a spiral impeller 300, as shown in the attached Figure 2 As shown, the spiral impeller 300 includes a plurality of spiral belt-shaped blades 310 uniformly arranged on the outside of the main transmission shaft 200. The spiral belt-shaped blades 310 are fixedly connected to the main transmission shaft 200 via a plurality of spiral blade connecting plates 320. The spiral belt-shaped blades 310 are arranged vertically. The twisted spiral belt-shaped blades 310 can be well stressed at all angles of rotation, thereby bringing better performance with a smaller stress-bearing area. As attached Figure 4As shown, the distributed power generation unit 400 includes a power generation device base 410 and a main drive outer gear 440. The power generation device base 410 is fixedly connected to the wind turbine bracket 100. The main drive outer gear 440 is fixedly sleeved on the main transmission shaft 200. The power generation device base 410 is provided with a plurality of power generation drive shafts 420 for a circle of rotation outside the main drive outer gear 440. The power generation drive shaft 420 is fixedly sleeved with a power generation drive gear 430. The power generation drive gear 430 is meshed and connected with the main drive outer gear 440. One end of the power generation drive shaft 420 is drivingly connected to a distributed generator 450. In order to individually control the connection between each distributed generator 450 and the main transmission shaft 200, an electromagnetic clutch 460 is further provided between one end of the power generation drive shaft 420 and the distributed generator 450. The electromagnetic clutch 460 is a conventional According to the technology, the electromagnetic clutch 460 generally includes a clutch power end and a clutch output end. The clutch power end and the clutch output end are connected and disconnected by electromagnetic force. The clutch power end is drivingly connected to one end of the power generation drive shaft 420, and the clutch output end is drivingly connected to the input shaft of the distributed generator 450. By controlling the electromagnetic clutch 460, the connection and disconnection between the distributed generator 450 and the power generation drive shaft 420 can be controlled. Since the distributed generator 450 is one of the important resistances when the drive shaft rotates, the number of distributed generators 450 put into operation can be changed by controlling the electromagnetic clutch 460, so as to change the rotation resistance of the main drive shaft 200 to a certain extent. At the same time, a single distributed power generation vertical axis wind turbine described in this embodiment can be provided with multiple distributed power generation units 400, such as the attached Figure 1 Two distributed power generation units 400 are arranged in the wind turbine support 100, and the two distributed power generation units 400 are arranged in sequence in the wind turbine support 100, so that the longitudinal space can be better utilized, and more distributed generators 450 can be arranged without increasing the floor space of the wind turbine, thereby improving energy utilization efficiency; The fan main shaft base 500 is arranged at the bottom of the fan bracket 100. Figure 3 As shown, the fan main shaft base 500 includes an electrical control box 510, and the bottom of the main transmission shaft 200 is rotatably connected to the electrical control box 510 through bearings and other components. A fan controller is arranged in the electrical control box 510, and a plurality of battery compartments 520 are evenly arranged on the outer side of the electrical control box 510. The battery compartments 520 are provided with fan energy storage batteries. The fan energy storage batteries are generally heavy. The battery compartments 520 for placing the fan energy storage batteries are evenly distributed on the outer side of the electrical control box 510, and the weight of the fan energy storage batteries can be cleverly used as the support feet of the main transmission shaft 200, which ensures the stable operation of the main transmission shaft 200 while eliminating the need to add a separate support foot, thereby reducing the cost. The fan controller, as the control center of the entire device, is electrically connected to the fan energy storage battery, the distributed generator 450, the electromagnetic clutch 460 and the wind detection device 600.

[0017] In a more optimized solution, the distributed power generation unit 400 also includes an auxiliary drive internal gear 470. The auxiliary drive internal gear 470 is fixedly sleeved on the main transmission shaft 200 like the main drive external gear 440. At the same time, the power generation drive gear 430 is meshedly connected with the auxiliary drive internal gear 470, so that the power generation drive gear 430 is limited between the inner gear ring of the auxiliary drive internal gear 470 and the outer gear ring of the main drive external gear 440. When only the main drive external gear 440 independently drives the power generation drive gear 430, the power generation drive gear 430 will continue to be driven by the main drive external gear. Due to the outward pressure of the gear 440, after long-term operation, the generator drive shaft 420 is prone to tilting and wear due to the force, affecting the rotation effect. When an auxiliary drive internal gear 470 is added to the outside of the generator drive gear 430, the auxiliary drive internal gear 470 will continuously provide an inward pressure to the generator drive gear 430 during the process of driving the generator drive gear 430, thereby offsetting the outward pressure from the main drive external gear 440 to a certain extent. Under the two-phase offset, the wear of the generator drive shaft 420 can be reduced and the stability during long-term operation can be improved.

[0018] When the distributed power generation vertical axis fan of this embodiment is in operation, the wind pushes the spiral impeller 300 to drive the main transmission shaft 200 to rotate, and the main transmission shaft 200 simultaneously drives the power generation drive gear 430 in the distributed power generation unit 400 to rotate through multiple sets of main drive external gears 440 and auxiliary drive internal gears 470, and finally drives the distributed generator 450 to generate electricity through the power generation drive shaft 420. In this process, the highlight of the distributed power generation vertical axis fan in this embodiment is that it can freely select the number of distributed generators 450 connected to the power generation operation. The core is that an electromagnetic clutch 460 is set between each power generation drive shaft 420 and the distributed generator 450, and the fan controller can control the distributed generator 450 and the power generation drive shaft 420 according to different working conditions. The connection between the shafts 420, for example, in the start-up stage of the fan impeller, the main drive shaft 200 is subject to the greatest resistance. At this time, the number of connected distributed generators 450 can be minimized, or even all distributed generators 450 can be disconnected to ensure that the main drive shaft 200 starts quickly under minimum resistance. When the wind becomes weaker, in order to ensure the optimal rotation efficiency of the main drive shaft 200, the number of connected distributed generators 450 can be reduced through preset data control to avoid the main drive shaft 200 from stopping. When the wind strengthens, the number of connected distributed generators 450 can be increased through preset data control to improve energy utilization. In general, compared with the traditional single generator layout, the distributed power generation vertical axis wind turbine in this embodiment has more flexible usage scenarios, better adaptability to strong and weak wind fields, and more complete energy utilization.

[0019] Example 2, refer to the attached Figure 5 In the embodiment 2, a distributed power generation vertical axis wind turbine changes the wind turbine impeller from a spiral impeller 300 to a lift-drag composite impeller 700, as shown in the attached Figure 6 As shown, the lift-drag composite impeller 700 includes several composite impeller connecting plates 710 fixedly connected to the outside of the main transmission shaft 200, the composite impeller connecting plate 710 is rotatably provided with lift-type blades 720, and the composite impeller connecting plate 710 is rotatably provided with resistance-type blades 730 between the main transmission shaft 200 and the lift-type blades 720. The lift-type blades 720 have a higher wind energy utilization rate, but their starting torque is small and the starting performance is poor, while the resistance-type blades 730 have a better starting performance. The combination of the two blades can further improve the starting performance and wind energy utilization rate of the vertical axis wind turbine. At the same time, in this embodiment, the impeller performance can be further improved by setting a plurality of lift-drag composite impellers 700, as shown in the attached figure. Figure 6 According to the content, two lift-drag compound impellers 700 are stacked up and down, and the lift-type blades 720 and the resistance-type blades 730 of the two adjacent lift-drag compound impellers 700 are staggered to further improve the utilization rate of wind energy. Compared with the spiral impeller 300 in Example 1, the lift-drag compound impeller 700 in Example 2 has better starting performance and is more conducive to the large-scale development of equipment. The spiral impeller 300 in Example 1 has a simple structure and an integrally formed spiral belt blade 310, which has a lower manufacturing cost and is more suitable for use on miniaturized equipment. Both have their own advantages and disadvantages, and can be selected according to specific design requirements.

[0020] 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 device or element 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.

[0021] The above are only preferred embodiments of the present invention. Any person skilled in the art may modify the present invention by using the above technical solutions or modify it into an equivalent technical solution. Therefore, any simple modification or equivalent replacement made according to the technical solution of the present invention shall fall within the scope of protection claimed by the present invention.

Claims

1. A distributed power generation vertical axis wind turbine, characterized in that: include: Fan support (100); A main transmission shaft (200), the main transmission shaft (200) being rotatably mounted on the fan support (100), and the main transmission shaft (200) being fixedly mounted with a fan impeller; A distributed power generation unit (400) comprises a power generation device base (410) and a main drive external gear (440), wherein the power generation device base (410) is fixedly connected to a fan bracket (100), the main drive external gear (440) is fixedly sleeved on a main transmission shaft (200), the power generation device base (410) is provided with a plurality of power generation drive shafts (420) for one-circle rotation outside the main drive external gear (440), the power generation drive shaft (420) is fixedly sleeved with a power generation drive gear (430), the power generation drive gear (430) is meshedly connected to the main drive external gear (440), and one end of the power generation drive shaft (420) is drivingly connected to a distributed generator (450).

2. A distributed power generation vertical axis wind turbine according to claim 1, characterized in that: The number of the distributed power generation units (400) is ≥1. When the number of the distributed power generation units (400) is greater than 1, the plurality of distributed power generation units (400) are arranged in sequence in the wind turbine support (100) from top to bottom.

3. A distributed power generation vertical axis wind turbine according to claim 2, characterized in that: An electromagnetic clutch (460) is also provided between one end of the power generation drive shaft (420) and the distributed generator (450), the electromagnetic clutch (460) comprising a clutch power end and a clutch output end, the clutch power end being drivingly connected to one end of the power generation drive shaft (420), and the clutch output end being drivingly connected to the input shaft of the distributed generator (450).

4. A distributed power generation vertical axis wind turbine according to claim 3, characterized in that: The distributed power generation unit (400) further comprises an auxiliary drive internal gear (470), wherein the auxiliary drive internal gear (470) is fixedly sleeved on the main transmission shaft (200), and the power generation drive gear (430) is meshingly connected with the auxiliary drive internal gear (470).

5. A distributed power generation vertical axis wind turbine according to claim 4, characterized in that: The invention also comprises a fan main shaft base (500) arranged at the bottom of the fan bracket (100), the fan main shaft base (500) comprising an electrical control box (510), the bottom of the main transmission shaft (200) being rotatably connected to the electrical control box (510), a fan controller being arranged in the electrical control box (510), a plurality of battery compartments (520) being evenly distributed around the outer side of the electrical control box (510), a fan energy storage battery being arranged in the battery compartment (520), and the fan energy storage battery, the distributed generator (450) and the electromagnetic clutch (460) being all electrically connected to the fan controller.

6. A distributed power generation vertical axis wind turbine according to claim 4, characterized in that: A wind force detection device (600) is provided on the upper portion of the main transmission shaft (200), and the wind force detection device (600) is electrically connected to a fan controller.

7. A distributed power generation vertical axis wind turbine according to any one of claims 1 to 6, characterized in that: The fan impeller is a spiral impeller (300), comprising a plurality of spiral belt-shaped blades (310) evenly arranged on the outside of a main transmission shaft (200), the spiral belt-shaped blades (310) being fixedly connected to the main transmission shaft (200) via a plurality of spiral blade connecting plates (320).

8. A distributed power generation vertical axis wind turbine according to any one of claims 1 to 6, characterized in that: The fan impeller is a lift-drag composite impeller (700), the lift-drag composite impeller (700) comprising a plurality of composite impeller connecting plates (710) fixedly connected to the outside of a main transmission shaft (200), the composite impeller connecting plates (710) being rotatably provided with lift-type blades (720), and the composite impeller connecting plates (710) being rotatably provided with drag-type blades (730) between the main transmission shaft (200) and the lift-type blades (720).

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