Wind power generation device and energy storage system

Abstract

The embodiment of the utility model relates to a wind power generation device and an energy storage system. The wind power generation device comprises a generator and a wind wheel structure. The wind wheel structure comprises blades and a rotating shaft, and the blades are fixed to the rotating shaft. The rotating shaft is connected to an input shaft of the generator, the axial direction of the rotating shaft coincides with the axial direction of the input shaft of the generator, and the blades are used for bearing wind power to drive the input shaft to rotate. Therefore, the torque of the wind power to the blades can be transmitted to the generator to the maximum extent, namely the energy loss of the wind power transmitted to the generator from the blades is small, the overall transmission efficiency of the wind power generation device is high, and the maximum utilization of wind energy can be realized. In addition, the wind power generation device is compact in structure, easy and convenient to maintain and low in cost, the technological assembly of the whole equipment is reduced, the damage rate of the whole equipment is reduced, and the operation stability of the wind power generation device is improved.

Description

Technical Field

[0001] The present application relates to the field of energy storage technology, and in particular to a wind power generation device and an energy storage system. Background Art

[0002] Wind energy is a crucial component of the renewable energy landscape. Wind turbines convert wind energy into electricity for utilization. By integrating energy storage battery technology into wind power generation, wind energy can be stored during periods of high or stable wind speeds for use during periods of lower or calm winds. Energy storage batteries offer advantages such as high storage efficiency and fast response times, making them an effective off-grid energy system when combined with wind turbines.

[0003] A wind turbine generator consists of a generator and a rotor structure connected to the generator's input shaft. When wind acts on the rotor structure, the blades in the rotor structure rotate, which in turn rotates the generator's input shaft, generating electricity.

[0004] However, the transmission efficiency of conventional wind turbines is low, and their utilization of wind power is limited. During the implementation of this application, the applicant discovered that the conventional wind rotor structure is connected to the input shaft of the generator via a power transmission mechanism, which results in a loss of transmission efficiency due to the power transmission mechanism, thereby reducing the overall transmission efficiency of the wind turbine. Utility Model Content

[0005] The embodiments of the present application provide a wind power generation device and an energy storage system, which overcome the above-mentioned problems or at least partially solve the above-mentioned problems.

[0006] According to one aspect of an embodiment of the present application, a wind power generation device is provided, comprising: a generator and a wind wheel structure; the wind wheel structure comprises blades and a rotating shaft, the blades being fixed to the rotating shaft; the rotating shaft being connected to the input shaft of the generator, the axial direction of the rotating shaft coincides with the axial direction of the input shaft of the generator, and the blades being used to withstand wind force to drive the input shaft of the generator to rotate.

[0007] In an optional manner, the wind power generation device further includes a coupling, which connects the rotating shaft and the input shaft of the generator.

[0008] In an optional manner, the input shaft of the generator and the rotating shaft are integrally formed.

[0009] In an optional embodiment, the number of the wind wheel structures is two, and the input shaft of the generator has a first end and a second end symmetrically arranged, wherein the rotating shaft of one of the wind wheel structures is connected to the first end, and the rotating shaft of the other wind wheel structure is connected to the second end.

[0010] In an optional manner, the wind wheel structure further includes a wind box, and the blades are accommodated in the wind box; the wind power generation device further includes a bearing, and the bearing is fixed to the wind box, and the rotating shaft is rotatably connected to the bearing.

[0011] In an optional manner, the bearing is fixed to the end of the wind box away from the generator, and the rotating shaft passes through the wind box and is rotatably connected to the bearing; the wind power generation device also includes a bearing cover, and the bearing cover is provided at the end of the bearing away from the wind box.

[0012] In an optional manner, the wind power generation device further includes a support member, which is supported between the wind box and the generator.

[0013] In an optional manner, the input shaft of the generator passes through the support member and is connected to the rotating shaft; one end of the support member is fixed to the bellows, and the other end of the support member has an abutment member extending radially along the input shaft of the generator, and the abutment member abuts against the generator.

[0014] In an optional manner, there are multiple blades, and the multiple blades are evenly distributed along the circumference of the input shaft of the generator.

[0015] According to another aspect of an embodiment of the present application, there is provided an energy storage system, comprising an energy storage battery and the above-mentioned wind power generation device, wherein the energy storage battery is connected to the wind power generation device.

[0016] The beneficial effects of the embodiments of the present application are as follows: The embodiments of the present application provide a wind power generation device comprising a generator and a rotor structure; the rotor structure comprises blades and a rotating shaft, the blades being fixed to the rotating shaft; the rotating shaft being connected to the input shaft of the generator, the axial direction of the rotating shaft coinciding with the axial direction of the generator input shaft, and the blades being configured to withstand wind force to drive the input shaft to rotate. In this wind power generation device, the axial direction of the rotating shaft in the wind power generation device coincides with the axial direction of the generator input shaft, thereby maximizing the transmission of wind torque on the blades to the generator. This results in minimal energy loss from wind power transmission from the blades to the generator, and improves the overall transmission efficiency of the wind power generation device, thereby maximizing wind energy utilization. Specifically, when wind force acts on the blades, the torque generated can be directly and efficiently transmitted to the generator input shaft, thereby driving the generator to generate electricity. The wind power generation device provided by this application reduces the energy losses associated with the complex power transmission mechanism and energy conversion link found in conventional wind power generation devices, thereby improving the overall energy conversion efficiency of the system.

[0017] Furthermore, the wind turbine generator system boasts a compact structure, easy maintenance, and low cost. This reduces the overall assembly process and overall damage rate of the device, thereby improving its operational stability. Specifically, the elimination of unnecessary power transmission mechanisms simplifies the overall structure of the device, reducing manufacturing costs and maintenance. This also enhances the stability and reliability of the device's operation in harsh environments, further enhancing its cost-effectiveness and practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the drawings without creative work.

[0019] Figure 1 is a schematic diagram of a wind power generation device provided in an embodiment of the present application;

[0020] Figure 2 is a schematic diagram of another implementation of the wind power generation device provided in an embodiment of the present application;

[0021] Figure 3 is a schematic diagram of a generator provided in an embodiment of the present application;

[0022] Figure 4 Schematic diagram of the energy storage system provided in an embodiment of the present application. DETAILED DESCRIPTION

[0023] In order to facilitate understanding of the present application, the present application is described in more detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that when an element is described as "fixed to" another element, it can be directly on the other element, or there can be one or more centered elements therebetween. When an element is described as "connected to" another element, it can be directly connected to the other element, or there can be one or more centered elements therebetween. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this specification are for illustrative purposes only.

[0024] Unless otherwise defined, all technical and scientific terms used in this specification have the same meanings as those commonly understood by those skilled in the art to which this application belongs. The terms used in this specification and in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" as used in this specification includes any and all combinations of one or more of the relevant listed items.

[0025] See also Figure 1The wind turbine generator 100 includes a rotor structure 10 and a generator 20. The rotor structure 10 includes blades 101 and a rotating shaft 102. The blades 101 are fixed to the rotating shaft 102. The rotating shaft 102 is connected to the input shaft 201 of the generator 20. The axial direction of the rotating shaft 102 coincides with the axial direction of the input shaft 201 of the generator 20. The blades 101 are used to withstand wind force to drive the input shaft 201 to rotate. When wind force acts on the blades 101 of the rotor structure 10, the rotor blades 101 rotate, thereby rotating the input shaft 201 of the generator 20, thereby generating electrical energy in the generator 20. Because the axial direction of the rotating shaft 102 coincides with the axial direction of the input shaft 201 of the generator 20, when wind force acts on the blades 101, the torque generated can be directly and efficiently transmitted to the input shaft 201 of the generator 20, thereby driving the generator 20 to generate electrical energy. The wind power generation device 100 provided in the embodiment of the present application reduces energy losses in the complex power transmission mechanism and energy conversion links existing in the wind power generation devices in the prior art, thereby improving the energy conversion efficiency of the entire system.

[0026] It is worth noting that, in some embodiments, the number of the blades 101 is multiple, and the multiple blades 101 are evenly distributed along the circumference of the rotating shaft 102. By providing multiple blades 101, when wind acts on the multiple blades 101, each blade 101 can generate a torque, and the torques generated by the multiple blades 101 can be superimposed, thereby improving the utilization of wind power and thus improving the power generation efficiency of the generator 20. At the same time, evenly distributing the multiple blades 101 along the circumference of the rotating shaft 102 can ensure the uniform action of wind power in all directions, and avoid the situation where the generator 20 operates unsteadily due to the uneven distribution of the blades 101. This design not only improves the stability and reliability of the generator 20, but also optimizes the overall performance of the generator 20, enabling it to better adapt to complex and changeable wind environments.

[0027] It is also important to note that, in the wind turbine generator 100 provided in the embodiment of the present application, compared to the prior art in which the wind wheel structure is connected to the input shaft of the generator through a power transmission mechanism (such as gears), and the rotating shaft of the wind wheel structure is arranged perpendicular to the input shaft of the generator (such as patent 202410541695.8), in the embodiment of the present application, the torque generated by the wind acting on the blades 101 can be transmitted to the generator 20 along the straight line between the rotating shaft 102 and the input shaft 201 of the generator 20, thereby reducing the loss of the torque transmitted from the blades 101 to the generator 20 and improving the energy conversion efficiency of the wind turbine generator 100.

[0028] It is worth noting that, in some embodiments, see Figure 2The wind turbine generator 100 further includes a coupling 50 that connects the rotating shaft 102 to the input shaft 201 of the generator 20. The coupling 50 allows for a certain degree of angular deviation and axial displacement between the rotating shaft 102 and the input shaft 201 of the generator 20, thereby reducing operational instability and damage to the wind turbine generator 100 caused by misalignment between the rotating shaft 102 and the input shaft 201 of the generator 20.

[0029] For the above-mentioned wind wheel structure 10 and generator 20, in some embodiments, please refer to Figure 1 and Figure 3 The input shaft 201 of the generator 20 is integrally formed with the rotating shaft 102. This configuration combines the input shaft 201 and the rotating shaft 102 of the generator 20 into one, effectively tying the blades 101 of the wind rotor structure 10 directly to the input shaft 201 of the generator 20. This allows the torque generated by the wind acting on the blades 101 to be more directly transmitted to the input shaft 201 of the generator 20, maximizing the transmission of the torque from the blades 101 to the generator 20. This minimizes energy loss during the transmission of wind from the blades 101 to the generator 20, improving the overall transmission efficiency of the wind turbine 100 and maximizing wind energy utilization. Furthermore, since the blades 101 are fixed to the input shaft 201 of the generator 20, the wind turbine 100 has a compact structure, is easy to maintain, and is low-cost. This reduces the overall assembly process for the device, reduces the overall damage rate, and improves the operational stability of the wind turbine 100. Specifically, by eliminating unnecessary power transmission mechanisms, the overall structure of the device is simpler, reducing manufacturing costs and maintenance difficulties. At the same time, this also enables the wind power generation device 100 to operate more stably and reliably even under harsh working conditions, further improving its economy and practicality.

[0030] Regarding the aforementioned wind rotor structures 10, in some embodiments, there are two wind rotor structures 10, and the input shaft 201 of the generator 20 has a symmetrically arranged first end 2011 and a second end 2012. The rotating shaft 102 of one wind rotor structure 10 is connected to the first end 2011, while the rotating shaft 102 of the other wind rotor structure 10 is connected to the second end 2012. With this arrangement, the torque generated by both wind rotor structures 10 can act on the generator 20, thereby improving the utilization of wind power by the wind turbine 100. Furthermore, because the axial directions of the rotating shafts 102 of both wind rotor structures 10 coincide with the input shaft 201 of the generator 20, the torque generated by each wind rotor structure 10 can be directly and efficiently transmitted to the input shaft 201 of the generator 20, thereby driving the generator 20 to generate electricity. This results in a high overall energy conversion efficiency for the wind turbine 100 equipped with two wind rotor structures 10.

[0031] Regarding the above-mentioned wind rotor structure 10, in some embodiments, the wind rotor structure 10 further includes a bellows 103, in which the blades 101 are housed; the wind turbine 100 further includes a bearing 30, which is fixed to the bellows 103, and the rotating shaft 102 is rotatably connected to the bearing 30. The provision of the bellows 103 can, on the one hand, protect the blades 101; on the other hand, the provision of the bellows 103 can increase the stability of the torque generated by the wind force acting on the blades 101, thereby improving the stability of the wind turbine 100; furthermore, the bellows 103 can be used for mounting the bearing 30, which carries and distributes the weight of the wind turbine 100, thereby supporting the rotation of the rotating shaft 102, reducing the friction coefficient of the rotating shaft 102 during rotation, and ensuring rotation accuracy.

[0032] It is worth noting that, in some embodiments, the bearing 30 is fixed to the end of the wind box 103 away from the generator 20, and the rotating shaft 102 passes through the wind box 103 and is rotatably connected to the bearing 30. The wind turbine 100 also includes a bearing cover 40, which is provided on the end of the bearing 30 away from the wind box 103. The provision of the bearing cover 40 not only protects the bearing 30 from dust, moisture, and other impurities in the external environment, but also reduces wear and failure of the bearing 30 and increases the service life of the bearing 30. It also plays a certain role in fixing the bearing 30, ensuring the stable position of the bearing 30 in the wind turbine 100 and preventing it from displacement or loosening due to vibration or external forces.

[0033] It is worth noting that when there are two wind wheel structures 10 , there are two bearings 30 , and one bearing 30 is fixed to the wind box 103 of one wind wheel structure 10 .

[0034] It is worth noting that when there are two wind wheel structures 10 , there are two bearing covers 40 , and one bearing cover 40 is disposed on the end of the bearing 30 away from the wind box 103 .

[0035] It is worth noting that, please refer to Figure 1 In some embodiments, the wind power generation device 100 further includes a support member 60, which is supported between the wind box 103 and the generator 20. The support member 60 fixes the relative positions of the wind box 103 and the generator 20, thereby ensuring the stability and reliability of the wind power generation device 100 during operation.

[0036] It is worth noting that, in some embodiments, a specific implementation method of the support member 60 being supported between the bellows 103 and the generator 20 is that the input shaft 201 of the generator 20 passes through the support member 60 and is connected to the rotating shaft 102; one end of the support member 60 is fixed to the bellows 103, and the other end of the support member 60 has an abutment member 601 extending radially along the input shaft 201 of the generator 20, and the abutment member 601 abuts against the generator 20.

[0037] It is understandable that, in some embodiments, the abutment member 601 is axially arranged around the input shaft 201 of the generator 20 , thereby enhancing the fixing effect of the support member 60 on the relative position of the wind box 103 and the generator 20 .

[0038] It can be understood that when there are two wind rotor structures 10 , there are two support members 60 , and one support member 60 is supported between the wind box 103 of one wind rotor structure 10 and the generator 20 .

[0039] In order to facilitate readers to understand the design concept of the present application, examples are given to illustrate the principle that the wind power generation device 100 provided in the embodiment of the present application has high transmission efficiency and high utilization rate of wind power.

[0040] See also Figure 2 When there are two wind rotor structures 10, the input shaft 201 of the generator 20 is connected to the rotating shaft 102 of the wind rotor structure 10 through a coupling 50. There are two couplings 50 and two bearings 30. Assuming that the torque generated by the two wind rotor structures 10 is T0, assuming that the transmission efficiency of a pair of bearings 30 is η1, and assuming that the transmission efficiency of a pair of couplings 50 is η2, then the torque T1 exerted on the input shaft 201 of the generator 20 is: T1=T0η1η2. Since η1 and η2 are both less than 1, the torque generated by the wind rotor structure 10 is reduced, and thus the utilization rate of wind power by the wind turbine generator 100 is reduced.

[0041] See also Figure 1When there are two wind rotor structures 10, the input shaft 201 of the generator 20 is integrally formed with the rotating shaft 102 of the wind rotor structure 10, and there are two bearings 30, assuming that the torque generated by the two wind rotor structures 10 is T0, and assuming that the transmission efficiency of a pair of bearings 30 is η1, then the torque T1′ applied to the input shaft 201 of the generator 20 is: T1′T0η2. Since η2 is less than 1, the torque generated by the wind rotor structure 10 is reduced, thereby reducing the wind power utilization efficiency of the wind turbine 100. However, although the wind power utilization efficiency of the wind turbine 100 is reduced, since T1′>T1, the transmission efficiency of the wind turbine 100 is higher than that of the configuration in which the input shaft 201 of the generator 20 and the rotating shaft 102 of the wind rotor structure 10 are connected via a coupling 50, thereby improving the wind power utilization efficiency of the wind turbine 100.

[0042] It is understandable that when a power transmission mechanism (such as a gear) as in the prior art is provided between the wind rotor structure 10 and the generator 20, the power transmission mechanism will superimpose a transmission efficiency less than 1, thereby reducing the torque generated by the wind rotor structure 10. In other words, the embodiments of the present application provide Figure 1 The wind turbine generator 100 shown is also Figure 2 The wind power generation device 100 shown has an overall transmission efficiency and a higher utilization rate of wind power than the conventional form in which the wind wheel structure 10 and the generator 20 are connected via a power transmission mechanism.

[0043] In the embodiment of the present application, a wind turbine generator 100 includes a generator 20 and a rotor structure 10; the rotor structure 10 includes blades 101 and a rotating shaft 102; the blades 101 are fixed to the rotating shaft 102; the rotating shaft 102 is connected to the input shaft 201 of the generator 20, and the axial direction of the rotating shaft 102 coincides with the axial direction of the input shaft 201 of the generator 20. The blades 101 are used to withstand wind force to drive the input shaft 201 to rotate. Through this wind turbine generator 100, because the axial direction of the rotating shaft 102 coincides with the axial direction of the input shaft 201 of the generator 20, the torque of the wind force on the blades 101 can be transmitted to the generator 20 to the maximum extent. That is, the energy loss of the wind force transmitted from the blades 101 to the generator 20 is small, the overall transmission efficiency of the wind turbine generator 100 is high, and the maximum utilization of wind energy can be achieved. Specifically, when wind forces act on blades 101, the torque generated can be directly and efficiently transmitted to input shaft 201 of generator 20, thereby driving generator 20 to generate electricity. The wind turbine generator 100 provided herein reduces energy losses associated with the complex power transmission mechanism and energy conversion process found in conventional wind turbine generators 100, thereby improving the overall system's energy conversion efficiency.

[0044] Furthermore, the wind turbine generator 100 boasts a compact structure, easy maintenance, and low cost. This reduces overall equipment assembly processes, lowers the overall equipment damage rate, and improves the operational stability of the wind turbine generator 100. Specifically, the elimination of unnecessary power transmission mechanisms results in a simpler overall structure, which helps reduce manufacturing costs and maintenance. This also ensures more stable and reliable operation of the device in harsh environmental conditions, further enhancing its cost-effectiveness and practicality.

[0045] This application also provides an embodiment of an energy storage system 200, see Figure 4 The energy storage system 200 includes an energy storage battery 2001 and a wind power generation device 100 , and the energy storage battery 2001 is connected to the wind power generation device 100 .

[0046] In some embodiments, the energy storage system 200 further includes a controller 2002, an AC-DC rectifier 2003, a filter 2004, a buck-boost converter 2005, a first relay K1, a second relay K2, a display panel 2006, and an inverter 2007. The wind turbine 100 is connected to the AC-DC rectifier 2003, the filter 2004 is connected to the buck-boost converter 2005, the buck-boost converter 2005 is connected to the controller 2002, the buck-boost converter 2005 is connected to the first relay K1, the first relay K1 is connected to the controller 2002, the first relay K1 is connected to the energy storage battery 2001, the energy storage battery 2001 is connected to the second relay K2, the second relay K2 is connected to the controller 2002, and the second relay K2 is connected to the inverter 2007. The inverter 2007 is used to supply power to the AC load CL and the DC load DL. The display panel 2006 is connected to the controller 2002 and can display the output status of the energy storage system 200. The specific structure and function of the wind power generation device 100 can be found in the above embodiments and will not be described in detail here.

[0047] In the embodiment of the present application, the wind power generation device 200 generates AC power, which is sent to the buck-boost converter 2005 through the AC-DC rectifier 2003 and the filter 2004. The buck-boost converter 2005 receives the control signal from the controller 2002, matches the voltage, and charges the energy storage battery 2001 through the first relay K1. When the battery is fully charged, the first relay K1 is disconnected. The electric energy in the energy storage battery 2001 is sent to the inverter 2007 through one second relay K2, which can supply power to the AC load CL and another second relay K2 to supply power to the DC load DL. When the energy storage battery 2001 is undervoltage, the second relay K2 is disconnected. The controller 2002 can control the display panel 2006 to display the output status.

[0048] It is worth noting that, in some embodiments, the above-mentioned display panel 2006 may not be provided, and the functions of the energy storage system 200 provided in the embodiment of the present application can also be achieved.

[0049] It should be noted that the preferred embodiments of the present application are given in the specification and drawings of this application. However, the present application can be implemented in many different forms and is not limited to the embodiments described in this specification. These embodiments are not intended to be additional limitations on the content of this application. The purpose of providing these embodiments is to make the understanding of the disclosure of this application more thorough and comprehensive. In addition, the above-mentioned technical features can be combined with each other to form various embodiments not listed above, which are all considered to be within the scope of the description of this application; further, it is obvious to those skilled in the art that improvements or changes can be made based on the above description, and all such improvements and changes should fall within the scope of protection of the claims attached to this application.

Claims

1. A wind power generation device, characterized in that: include: Generator and wind rotor structure; The wind wheel structure includes blades and a rotating shaft, and the blades are fixed to the rotating shaft; The rotating shaft is connected to the input shaft of the generator, the axial direction of the rotating shaft coincides with the axial direction of the input shaft of the generator, and the blades are used to withstand wind force to drive the input shaft of the generator to rotate; There are two wind rotor structures, and the input shaft of the generator has a first end and a second end that are symmetrically arranged, wherein the rotating shaft of one of the wind rotor structures is connected to the first end, and the rotating shaft of the other wind rotor structure is connected to the second end.

2. The wind power generation device according to claim 1, characterized in that: The wind power generation device further includes a coupling, which connects the rotating shaft and the input shaft of the generator.

3. The wind power generation device according to claim 1, characterized in that: The input shaft of the generator is integrally formed with the rotating shaft.

4. The wind power generation device according to any one of claims 1 to 3, characterized in that: The wind wheel structure further includes a wind box, and the blades are accommodated in the wind box; The wind power generation device further includes a bearing, which is fixed to the wind box, and the rotating shaft is rotatably connected to the bearing.

5. The wind power generation device according to claim 4, characterized in that: The bearing is fixed to one end of the wind box away from the generator, and the rotating shaft passes through the wind box and is rotatably connected to the bearing; The wind power generation device further includes a bearing cover, which is arranged at an end of the bearing away from the wind box.

6. The wind power generation device according to claim 4, characterized in that: The wind power generation device further includes a support member, which is supported between the wind box and the generator.

7. The wind power generation device according to claim 6, characterized in that: The input shaft of the generator passes through the support member and is connected to the rotating shaft; One end of the support member is fixed to the wind box, and the other end of the support member is provided with an abutment member extending along the radial direction of the input shaft of the generator, and the abutment member abuts against the generator.

8. The wind power generation device according to claim 1, characterized in that: There are multiple blades, and the blades are evenly distributed along the circumference of the input shaft of the generator.

9. An energy storage system, characterized in that: It comprises an energy storage battery and a wind power generation device according to any one of claims 1 to 8, wherein the energy storage battery is connected to the wind power generation device.

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