Wind power generation device and energy storage system

Abstract

The embodiments of the present application relate to the field of energy storage technology, in particular, a wind power generation device and an energy storage system, wherein the wind power generation device comprises a wind rotor structure, a first rotating shaft, a first bevel gear, a first permanent magnetic suspension bearing, a second rotating shaft, a second bevel gear, a second permanent magnetic suspension bearing and a generator. The blades and the first bevel gear of the wind rotor structure are both arranged on the first rotating shaft, the first rotating shaft is inserted in the first permanent magnetic suspension bearing, and the direction of the force of the first permanent magnetic suspension bearing on the first rotating shaft is opposite to the direction of the force of the first bevel gear on the first rotating shaft; the second bevel gear is arranged on the second rotating shaft, and the second bevel gear is meshed with the first bevel gear; the second rotating shaft is inserted in the second permanent magnetic suspension bearing, and the direction of the force of the second permanent magnetic suspension bearing on the second rotating shaft is opposite to the direction of the force of the second bevel gear on the second rotating shaft; the input end of the generator is connected to the second rotating shaft, so that the energy range of low wind speed can be utilized, and the wind energy can be fully utilized.

Description

Technical Field

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

[0002] A wind turbine is a device that converts wind energy into electrical energy. It uses wind power to drive the blades to rotate, which in turn drives the generator to rotate and generates electricity through the principle of electromagnetic induction. Wind turbines can be divided into small wind turbines and large commercial wind turbines according to their scale and purpose. The latter are usually installed in wind power plants. Among them, the former small wind turbines can be used in a variety of scenarios. Individual users can purchase and install them by themselves. The cost is low and can be built into an off-grid energy system.

[0003] In the process of realizing the present application, the applicant found that: at present, the transmission mechanism of the wind power generation device is supported by mechanical bearings. Even if rolling bearings are used, there will be sliding friction inside, resulting in a large starting resistance torque, causing the wind power generation device to generally discard the energy range of low wind speeds, and the wind energy cannot be fully utilized. Summary of the invention

[0004] In view of the above problems, the embodiments of the present application provide a wind power generation device and an energy storage system, which overcome the above problems or at least partially solve the technical problem of large starting resistance of the above wind power generation device.

[0005] According to one aspect of an embodiment of the present application, a wind power generation device is provided, comprising: a wind wheel structure, comprising blades and a bellows, wherein the blades are accommodated in the bellows; a first rotating shaft, wherein the blades are arranged on the first rotating shaft, wherein the direction of the axis of the first rotating shaft is a first direction, and wherein the blades are used to provide wind force so that the first rotating shaft rotates around the first direction; a first bevel gear, which is arranged on the first rotating shaft; a first permanent magnetic suspension bearing, wherein the first rotating shaft is inserted into the first permanent magnetic suspension bearing, wherein the direction of the force exerted by the first permanent magnetic suspension bearing on the first rotating shaft is opposite to the direction of the force exerted by the first bevel gear on the first rotating shaft; a second rotating shaft, which is arranged perpendicular to the first rotating shaft; a second bevel gear, which is arranged on the second rotating shaft, wherein the second bevel gear is meshed with the first bevel gear; a second permanent magnetic suspension bearing, wherein the second rotating shaft is inserted into the second permanent magnetic suspension bearing, wherein the direction of the force exerted by the second permanent magnetic suspension bearing on the second rotating shaft is opposite to the direction of the force exerted by the second bevel gear on the second rotating shaft; and a generator, wherein the input end of the generator is connected to the second rotating shaft.

[0006] In an optional embodiment, the number of the wind wheel structures is two, and the two wind wheel structures are symmetrically arranged at both ends of the first rotating shaft; the number of the first permanent magnetic suspension bearings is two, one end of the first rotating shaft is inserted into one of the first permanent magnetic suspension bearings, and the other end of the first rotating shaft is inserted into another one of the first permanent magnetic suspension bearings.

[0007] In an optional manner, the first permanent magnetic suspension bearing is arranged on a side of the bellows away from the first bevel gear, and the first rotating shaft passes through the bellows and is inserted into the first permanent magnetic suspension bearing.

[0008] In an optional manner, the wind power generation device further includes a limit member, which is disposed on the first rotating shaft and is used to bear the force exerted by the two first permanent magnetic bearings on the first rotating shaft.

[0009] In an optional embodiment, the wind power generation device also includes a gearbox and a third permanent magnetic suspension bearing, the first helical gear and the second helical gear are accommodated in the gearbox, the third permanent magnetic suspension bearing is arranged in the gearbox, the first rotating shaft is inserted in the third permanent magnetic suspension bearing, and the direction of the force exerted by the third permanent magnetic suspension bearing on the first rotating shaft is opposite to the direction of the force exerted by the first helical gear on the first rotating shaft.

[0010] In an optional manner, the wind power generation device further includes a support member, and the support member is supported between the gear box and the wind box.

[0011] In an optional manner, the support member is provided with a bearing hole, and the third permanent magnetic suspension bearing is provided in the bearing hole.

[0012] In an optional manner, the wind power generation device also includes a wind-seeking mechanism, which includes a wind-seeking inner cylinder, a first bearing, a wind-seeking outer cylinder and a second bearing; the wind-seeking inner cylinder is sleeved on the second rotating shaft; the wind-seeking outer cylinder is respectively fixed to the first bearing and the second bearing; the inner ring of the first bearing forms a rotating pair with the wind-seeking inner cylinder, the wind-seeking outer cylinder forms a rotating pair with the wind-seeking inner cylinder, the inner ring of the second bearing forms a rotating pair with the wind-seeking inner cylinder, and the wind-seeking inner cylinder is arranged on the generator; the wind-seeking outer cylinder is connected to the first rotating shaft.

[0013] In an optional manner, the first bevel gear and the second bevel gear are accommodated in the gear box, and the wind-finding outer cylinder is fixed to the gear box.

[0014] In an optional manner, the wind power generation device further includes a tapered roller bearing, which is disposed on the generator, and the second rotating shaft is sequentially inserted into the second permanent magnetic bearing and the tapered roller bearing.

[0015] In an optional manner, the wind power generation device further includes a controller and a column, the generator is arranged on the column, and the controller embraces the column.

[0016] 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.

[0017] The beneficial effects of the embodiments of the present application include: providing a wind power generation device, including a wind power generation device including a wind wheel structure, including blades and a bellows, wherein the blades are accommodated in the bellows; a first rotating shaft, wherein the blades are arranged on the first rotating shaft, wherein the direction of the axis of the first rotating shaft is a first direction, wherein the blades are used for providing wind force to rotate the first rotating shaft around the first direction; a first bevel gear, arranged on the first rotating shaft; a first permanent magnetic suspension bearing, wherein the first rotating shaft is inserted into the first permanent magnetic suspension bearing, wherein the direction of the force exerted by the first permanent magnetic suspension bearing on the first rotating shaft is opposite to the direction of the force exerted by the first bevel gear on the first rotating shaft; a second rotating shaft, which is arranged perpendicular to the first rotating shaft; a second bevel gear, which is arranged on the second rotating shaft, wherein the second bevel gear is meshed with the first bevel gear; a second permanent magnetic suspension bearing, wherein the second rotating shaft is inserted into the second permanent magnetic suspension bearing, wherein the direction of the force exerted by the second permanent magnetic suspension bearing on the second rotating shaft is opposite to the direction of the force exerted by the second bevel gear on the second rotating shaft; and a generator, wherein the input end of the generator is connected to the second rotating shaft. Through this arrangement, the first permanent magnetic suspension bearing and the second permanent magnetic suspension bearing can be used to reduce the resistance when the wind power generation device is started, so that the energy range of low wind speed can be used and the wind energy can be fully utilized.

[0018] In addition, since the direction of the force exerted by the first permanent magnetic suspension bearing on the first rotating shaft is opposite to the direction of the force exerted by the first bevel gear on the first rotating shaft, the force exerted by the first permanent magnetic suspension bearing on the first rotating shaft can be utilized to constrain the force exerted by the first permanent magnetic suspension bearing on the first rotating shaft, thereby hindering the reduction of the potential energy of the first permanent magnetic suspension bearing and improving the suspension stability of the wind power generation device in the first direction. Similarly, since the direction of the force exerted by the second permanent magnetic suspension bearing on the second rotating shaft is opposite to the direction of the force exerted by the second bevel gear on the second rotating shaft, the force exerted by the second bevel gear on the second rotating shaft can be utilized to constrain the force exerted by the second permanent magnetic suspension bearing on the second rotating shaft, thereby hindering the reduction of the potential energy of the second permanent magnetic suspension bearing and improving the suspension stability of the wind power generation device in the second direction, wherein the second direction is the direction of the axis of the second rotating shaft. That is, by setting the first bevel gear and the second bevel gear, the overall suspension stability of the wind power generation device is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0020] Figure 1 A schematic diagram of a wind power generation device provided in an embodiment of the present application;

[0021] Figure 2 Schematic diagram of an explosion of a wind power generation device provided in an embodiment of the present application;

[0022] Figure 3 A force analysis diagram of a wind power generation device provided in an embodiment of the present application;

[0023] Figure 4 A schematic diagram of potential energy provided in an embodiment of the present application;

[0024] Figure 5 A schematic diagram of an energy storage system provided in an embodiment of the present application. DETAILED DESCRIPTION

[0025] In order to facilitate the 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", "inside", "outside" and similar expressions used in this specification are for illustrative purposes only.

[0026] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used 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" used in this specification includes any and all combinations of one or more of the related listed items.

[0027] See also Figure 1 and Figure 2 The wind power generation device 100 includes a wind wheel structure 10, a first rotating shaft 20a, a first bevel gear 30a, a first permanent magnetic suspension bearing 40a, a second rotating shaft 20b, a second bevel gear 30b, a second permanent magnetic suspension bearing 40b and a generator 50. The wind wheel structure 10 includes blades 101 and a wind box 102. The blades 101 are accommodated in the wind box 102. The blades 101 are arranged on the first rotating shaft 20a. The direction of the axis of the first rotating shaft 20a is the first direction D1. The blades 101 are used to provide wind force to make the first rotating shaft 20a rotate around the first direction D1; the first bevel gear 30a is arranged on the first rotating shaft 20a. The first rotating shaft 20a is inserted in the first permanent magnetic suspension bearing 40a. The direction of the force of the first permanent magnetic suspension bearing 40a on the first rotating shaft 20a is the same as the first The direction of the force exerted by the bevel gear 30a on the first rotating shaft 20a is opposite to that of the first rotating shaft 20a; the second rotating shaft 20b is arranged perpendicular to the first rotating shaft 20a; the second bevel gear 30b is arranged on the second rotating shaft 20b, and the second bevel gear 30b is meshed with the first bevel gear 30a; the second rotating shaft 20b is inserted into the second permanent magnetic suspension bearing 40b, and the direction of the force exerted by the second permanent magnetic suspension bearing 40b on the second rotating shaft 20b is opposite to that of the force exerted by the second bevel gear 30b on the second rotating shaft 20b; the input end of the generator 50 is connected to the second rotating shaft 20b. Through the wind power generation device 100, wind force acts on the blades 101, and the first rotating shaft 20a rotates around the first direction D1. Since the first bevel gear 30a and the second bevel gear 30b are engaged, the second rotating shaft 20b rotates around the second direction D2 as the first rotating shaft 20a rotates. The second direction D2 is the direction of the axis of the second rotating shaft 20b. Then, the second rotating shaft 20b drives the input end of the generator 50 to rotate, so that the generator 50 generates electrical energy and realizes the conversion of wind energy into electrical energy.

[0028] In addition, through the wind power generation device 100, the first permanent magnetic suspension bearing 40a and the second permanent magnetic suspension bearing 40b can be used to reduce the resistance when the wind power generation device 100 is started, so that the energy range of low wind speed can be used, and wind energy can be fully utilized. Specifically, the first permanent magnetic suspension bearing 40a uses the magnetic field force generated by the permanent magnet to support the rotation of the first rotating shaft 20a, without the need for a traditional mechanical contact bearing, thereby avoiding the resistance caused by the contact friction with the first rotating shaft 20a. Similarly, the second permanent magnetic suspension bearing 40b uses the magnetic field force generated by the permanent magnet to support the rotation of the second rotating shaft 20b, without the need for a traditional mechanical contact bearing, thereby avoiding the resistance caused by the contact friction with the second rotating shaft 20b. When the wind power generation device 100 is started, the first rotating shaft 20a and the second rotating shaft 20b can be stably suspended and rotated in a non-contact state. This non-contact design greatly reduces the friction resistance caused by mechanical contact, thereby reducing the overall resistance of the wind power generation device 100 when it is started.

[0029] It is worth noting that, in some embodiments, for example, the rotation direction of the first bevel gear 30a is left-handed, and the first bevel gear 30a has a rightward force component on the first rotating shaft 20a, then the first permanent magnetic suspension bearing 40a is a left-thrust permanent magnetic suspension bearing, and the first permanent magnetic suspension bearing 40a has a leftward force on the first rotating shaft 20a, so that the direction of the force of the first permanent magnetic suspension bearing 40a on the first rotating shaft 20a is opposite to the direction of the force of the first bevel gear 30a on the first rotating shaft 20a, so that the spatial force of the first bevel gear 30a can be utilized to constrain the force of the first permanent magnetic suspension bearing 40a on the first rotating shaft 20a, thereby hindering the reduction of the potential energy of the first permanent magnetic suspension bearing 40a, and improving the suspension stability of the wind power generation device 100 in the first direction D1.

[0030] It can be understood that, in some embodiments, for example, the rotation direction of the first bevel gear 30a is right-handed, and the first bevel gear 30a has a leftward force component on the first rotating shaft 20a, then the first permanent magnetic suspension bearing 40a is a right-thrust permanent magnetic suspension bearing, and the first permanent magnetic suspension bearing 40a has a rightward force on the first rotating shaft 20a, so that the direction of the force of the first permanent magnetic suspension bearing 40a on the first rotating shaft 20a is opposite to the direction of the force of the first bevel gear 30a on the first rotating shaft 20a, so that the spatial force of the first bevel gear 30a can also be utilized to constrain the force of the first permanent magnetic suspension bearing 40a on the first rotating shaft 20a, thereby hindering the reduction of the potential energy of the first permanent magnetic suspension bearing 40a, and improving the suspension stability of the wind power generation device 100 in the direction where the first rotating shaft 20a is located (i.e., the first direction D1).

[0031] It is worth noting that, in some embodiments, when the rotation direction of the first bevel gear 30a is left-handed, the second bevel gear 30b meshing with the first bevel gear 30a is left-handed, and the second bevel gear 30b has a force component on the second rotating shaft 20b that is back to the second permanent magnetic suspension bearing 40b, for example, an upward force component, then the second permanent magnetic suspension bearing 40b is a push-down permanent magnetic suspension bearing, and the second permanent magnetic suspension bearing 40b has a downward force on the second rotating shaft 20b, so that the direction of the force of the second permanent magnetic suspension bearing 40b on the second rotating shaft 20b is opposite to the direction of the force of the second bevel gear 30b on the second rotating shaft 20b, so that the spatial force of the second bevel gear 30b can be utilized to constrain the force of the second permanent magnetic suspension bearing 40b on the second rotating shaft 20b, thereby hindering the reduction of the potential energy of the second permanent magnetic suspension bearing 40b, and improving the suspension stability of the wind power generation device 100 in the direction where the axis of the second rotating shaft 20b is located (i.e., the second direction D2). That is, by disposing the first bevel gear 30a and the second bevel gear 30b, the overall suspension stability of the wind power generation device 100 is improved.

[0032] It can be understood that, in some embodiments, when the rotation direction of the first bevel gear 30a is right-handed, the second bevel gear 30b meshing with the first bevel gear 30a is right-handed, and the second bevel gear 30b has a force component on the second rotating shaft 20b that is back to the second permanent magnetic suspension bearing 40b, for example, an upward force component, then the second permanent magnetic suspension bearing 40b is a push-down permanent magnetic suspension bearing, and the second permanent magnetic suspension bearing 40b has a downward force on the second rotating shaft 20b, so that the direction of the force of the second permanent magnetic suspension bearing 40b on the second rotating shaft 20b is opposite to the direction of the force of the second bevel gear 30b on the second rotating shaft 20b, so that the spatial force of the second bevel gear 30b can also be utilized to constrain the force of the second permanent magnetic suspension bearing 40b on the second rotating shaft 20b, thereby hindering the reduction of the potential energy of the second permanent magnetic suspension bearing 40b, and improving the suspension stability of the wind power generation device 100 in the direction where the axis of the second rotating shaft 20b is located (i.e., the second direction D2). That is, by disposing the first bevel gear 30a and the second bevel gear 30b, the overall suspension stability of the wind power generation device 100 is improved.

[0033] 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 first rotating shaft 20a. By setting 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, thereby improving the power generation efficiency of the generator 50. At the same time, evenly distributing the multiple blades 101 along the circumference of the first rotating shaft 20a can ensure the uniform action of wind power in all directions, avoid the situation where the first rotating shaft 20a rotates unsteadily due to the uneven distribution of the blades 101, and thus reduce the risk of unstable operation of the generator 50. This design not only improves the rotation stability and reliability of the first rotating shaft 20a, but also optimizes the overall performance of the wind power generation device 100, so that it can better adapt to the complex and changeable wind environment.

[0034] For the above-mentioned wind rotor structure 10 and the first permanent magnetic suspension bearing 40a, in some embodiments, the number of the wind rotor structures 10 is two, and the two wind rotor structures 10 are symmetrically arranged at the two ends of the first rotating shaft 20a; the number of the first permanent magnetic suspension bearings 40a used in conjunction with the two wind rotor structures 10 is two, one end of the first rotating shaft 20a is inserted into one of the first permanent magnetic suspension bearings 40a, and the other end of the first rotating shaft 20a is inserted into the other first permanent magnetic suspension bearing 40a. By symmetrically arranging the two wind rotor structures 10, on the one hand, it helps to balance the weight distribution of the entire wind power generation device 100, reduce the risk of tilting or damage of the wind power generation device 100 caused by the shift of the center of gravity, and improve the operating stability of the wind power generation device 100. In addition, the two wind rotor structures 10 can capture wind power at the same time, convert wind energy into mechanical energy, and transmit it to the generator 50, thereby improving the power generation efficiency. It is also important that the two first permanent magnetic bearings 40a respectively support the two ends of the first rotating shaft 20a, effectively reducing the vibration and noise of the first rotating shaft 20a during high-speed rotation, and improving the overall reliability and service life of the wind power generation device 100.

[0035] It is worth noting that, in some embodiments, see Figure 3The wind power generation device 100 further includes a limit member 3, which is disposed on the first rotating shaft 20a, and is used to bear the force exerted by the two first permanent magnetic bearings 40a on the first rotating shaft 20a. For example, if the rotation direction of the first bevel gear 30a is left-handed and the first permanent magnetic suspension bearing 40a is a left-push permanent magnetic suspension bearing, the limit member 3 is located at the end of the first rotating shaft 20a away from the first permanent magnetic suspension bearing 40a. The limit member 3 can be a pin or a positioning pin, etc., so that the first bevel gear 30a has a rightward force component on the first rotating shaft 20a, and the two first permanent magnetic suspension bearings 40a both have a leftward force on the first rotating shaft 20a. The limit member 3 bears the force of the two first permanent magnetic suspension bearings 40a on the first rotating shaft 20a. Through this design, even if the first rotating shaft 20a is subjected to various external and internal forces, the limit member 3 can ensure that the first rotating shaft 20a remains in a predetermined position and posture to prevent it from being offset or damaged due to uneven force.

[0036] It is worth noting that, in some embodiments, see Figure 1 and Figure 2 , the first permanent magnetic suspension bearing 40a is arranged on the side of the bellows 102 away from the first bevel gear 30a, and the first rotating shaft 20a penetrates the bellows 102 and is inserted into the first permanent magnetic suspension bearing 40a. Through this design, on the one hand, the blade 101 can be effectively encapsulated and protected, and the overall safety and stability are improved. In addition, the first permanent magnetic suspension bearing 40a is arranged on the side of the bellows 102 away from the first bevel gear 30a, and the first rotating shaft 20a penetrates the bellows 102 and is inserted into the first permanent magnetic suspension bearing 40a. Such a layout makes the entire transmission system compact and reduces unnecessary space occupation.

[0037] It is worth noting that, in some embodiments, the wind power generation device 100 further includes a bearing cover 60, the bearing cover 60 and the stopper are arranged at both ends of the first rotating shaft 20a opposite to each other, and the bearing cover 60 is arranged at one end of the first permanent magnetic suspension bearing 40a away from the bellows 102. By providing the bearing cover 60, on the one hand, the first permanent magnetic suspension bearing 40a can be protected and isolated from dust, moisture and other impurities in the external environment, thereby reducing the wear and failure of the first permanent magnetic suspension bearing 40a and improving the service life of the first permanent magnetic suspension bearing 40a; on the other hand, the bearing cover 60 also plays a certain fixing role, which can ensure the stability of the position of the first permanent magnetic suspension bearing 40a in the wind power generation device 100 and prevent it from being displaced or loosened due to vibration or external force.

[0038] It is worth noting that, in some embodiments, the wind power generation device 100 further includes a gearbox 70 and a third permanent magnetic suspension bearing 40c, the first bevel gear 30a and the second bevel gear 30b are accommodated in the gearbox 70, the third permanent magnetic suspension bearing 40c is arranged in the gearbox 70, the first rotating shaft 20a is inserted in the third permanent magnetic suspension bearing 40c, and the direction of the force of the third permanent magnetic suspension bearing 40c on the first rotating shaft 20a is opposite to the direction of the force of the first bevel gear 30a on the first rotating shaft 20a. That is, the first rotating shaft 20a passes through the third permanent magnetic suspension bearing 40c and is inserted in the first permanent magnetic suspension bearing 40a. By setting the third permanent magnetic suspension bearing 40c, that is, the first rotating shaft 20a and the wind wheel structure 10 are supported by the first permanent magnetic suspension bearing 40a and the third permanent magnetic suspension bearing 40c, the first rotating shaft 20a can achieve a smoother rotational movement, that is, the introduction of the third permanent magnetic suspension bearing 40c makes the transmission system formed by the first rotating shaft 20a, the first bevel gear 30a, the second bevel gear 30b, and the second rotating shaft 20b more stable and able to withstand greater loads and impacts, thereby improving the operating efficiency and reliability of the wind power generation device 100.

[0039] It can be understood that when the number of the wind wheel structures 10 is two, the number of the first permanent magnetic suspension bearings 40a is two, the number of the third permanent magnetic suspension bearings 40c is two, one end of the first rotating shaft 20a passes through one of the third permanent magnetic suspension bearings 40c and is then inserted into one of the first permanent magnetic suspension bearings 40a; the other end of the first rotating shaft 20a passes through another one of the third permanent magnetic suspension bearings 40c and is then inserted into another one of the first permanent magnetic suspension bearings 40a.

[0040] For the above-mentioned second permanent magnetic suspension bearing 40b, in some embodiments, the number of the second permanent magnetic suspension bearings 40b is two. By setting up two of the second permanent magnetic suspension bearings 40b, that is, the second rotating shaft 20b and supported by two second permanent magnetic suspension bearings 40b, the second rotating shaft 20b can achieve smoother rotational motion and can withstand greater loads and impacts, thereby improving the operating efficiency and reliability of the wind power generation device 100. In addition, by setting the second permanent magnetic suspension bearing 40b, the first permanent magnetic suspension bearing 40a and / or the third permanent magnetic suspension bearing 40c, the wind wheel structure 10, the first bearing 22, and the second bearing 24 can be suspended in the first direction D1 (which can also be the horizontal direction) and the second direction D2 (which can also be the vertical direction). The wind power generation device 100 has almost no friction loss in the first direction D1 and the second direction D2, which not only makes the resistance of the wind power generation device 100 small at startup, but also can achieve a smoother rotation movement of the first rotating shaft 20a and the second rotating shaft 20b, which can effectively improve the wind energy capture efficiency and the overall operation reliability. This design enables the wind power generation device 100 to maintain efficient and stable operation under various environmental conditions, providing more reliable technical support for the utilization of wind energy.

[0041] It is worth noting that, in some embodiments, the wind power generation device 100 further includes a tapered roller bearing 40d, the tapered roller bearing 40d is arranged on the generator 50, and the second rotating shaft 20b is sequentially inserted in the second permanent magnetic suspension bearing 40b and the tapered roller bearing 40d. Since the inner ring and the outer ring of the tapered roller bearing 40d are separable, when the second rotating shaft 20b is suspended on the second permanent magnetic suspension bearing 40b in the second direction D2 and the second bevel gear 30b has an upward force component on the second rotating shaft 20b that is opposite to the second permanent magnetic suspension bearing 40b, the internal friction of the tapered roller bearing 40d disappears, and the second rotating shaft 20b can also provide support for centering and positioning when it stops rotating.

[0042] It is worth noting that, in some embodiments, the tapered roller bearing 40d is arranged inside the generator 50, specifically, it can be arranged at the lower end cover 501 of the generator 50, so that the second rotating shaft 20b is connected to the rotor 502 of the generator 50, the rotor 502 of the generator 50 is sleeved on the stator 503 of the generator 50, the stator 503 of the generator 50 is arranged at the lower end cover 501 of the generator 50, the generator 50 also includes a shell 504, the shell 504 is arranged at the lower end cover 501 of the generator 50, the shell 504 is covered outside the stator 503, and the upper end cover 505 of the generator 50 is covered on the shell 504, then along the second rotating shaft 20b, the structure of the wind power generation device 100 is compact, which can reduce unnecessary space occupation along the axial or radial direction of the second rotating shaft 20b.

[0043] For the above-mentioned wind wheel structure 10 and gear box 70, in some embodiments, a support member 80 is arranged between the wind wheel structure 10 and the gear box 70, and the wind wheel structure 10 and the gear box 70 are supported by the support member 80. Through the support member 80, the relative position of the wind box 102 and the generator 50 is fixed, thereby ensuring the stability and reliability of the wind power generation device 100 during operation.

[0044] It is worth noting that, in some embodiments, a specific implementation method of the support member 80 being supported between the wind box 102 and the gear box 70 is that the support member 80 is provided with a bearing hole 801, and the third permanent magnetic suspension bearing 40c is provided in the bearing hole 801, that is, the first rotating shaft 20a and the support member 80 are coaxially arranged, so that the structure of the wind power generation device 100 is compact and the overall force is more uniform. In addition, the setting of the support member 80 can also effectively absorb and disperse the vibration generated by the wind power generation device 100 during operation, further improving the stability and service life of the equipment. In some specific embodiments, the support member 80 can also be designed to have a certain elasticity to adapt to the dynamic adjustment requirements under different wind speeds and load conditions.

[0045] It is worth noting that, in some embodiments, the wind power generation device 100 further includes a column 90, and the generator 50 is arranged on the column 90. The column 90 is a supporting mechanism for the entire wind power generation device 100. By setting the column 90, the stability of the wind power generation device 100 is further enhanced. The column 90 is usually made of high-strength material to withstand various forces and moments generated by the wind power generation device 100 during operation. In some embodiments, the bottom of the column 90 is fixed to the foundation to ensure the stability of the entire device. In addition, in order to improve the convenience and stability of the generator 50 being arranged on the column 90, the column 90 is also provided with a flange 901, and the generator 50 is arranged on the flange 901 of the column 90.

[0046] It is worth noting that, in some embodiments, the wind power generation device 100 further includes a main controller 1, which is surrounded by the column 90. The main controller 1 is the control center of the wind power generation device 100 and is used to monitor and adjust the operating state of the wind power generation device 100, so that the wind power generation device 100 can capture wind energy more efficiently and reduce equipment losses caused by wind fluctuations. In addition, by surrounding the main controller 1 with the column 90, the column 90 can be fully utilized to achieve a compact layout of the wind power generation device 100.

[0047] It is worth noting that, in some embodiments, the wind power generation device 100 further includes a wind-seeking mechanism 2, the wind-seeking mechanism 2 includes a wind-seeking inner cylinder 21, a first bearing 22, a wind-seeking outer cylinder 23 and a second bearing 24; the wind-seeking inner cylinder 21 is sleeved on the second rotating shaft 20b; the wind-seeking outer cylinder 23 is fixed to the first bearing 22 and the second bearing 24 respectively; the inner ring of the first bearing 22 forms a rotation pair with the wind-seeking inner cylinder 21, the wind-seeking outer cylinder 23 forms a rotation pair with the wind-seeking inner cylinder 21, the inner ring of the second bearing 24 forms a rotation pair with the wind-seeking inner cylinder 21, the wind-seeking inner cylinder 21 is arranged on the generator 50; the wind-seeking outer cylinder 23 is connected to the first rotating shaft 20a. Through the wind-seeking mechanism 2, the wind power generation device 100 can realize automatic tracking of wind direction, thereby improving the efficiency of capturing wind energy. Specifically, the wind-seeking mechanism 2 is designed with a rotating pair of the first bearing 22 and the second bearing 24, so that the wind-seeking inner cylinder 21 and the wind-seeking outer cylinder 23 can flexibly rotate relative to each other, thereby realizing a rapid response to the wind direction. When the wind direction changes, the wind-seeking outer cylinder 23 drives the first rotating shaft 20a to rotate, thereby making the blades 101 in the wind wheel structure 10 face the wind, realizing automatic wind-seeking, improving the efficiency of the blades 101 receiving wind energy, and thus maximizing the power generation efficiency.

[0048] It is worth noting that, in some embodiments, the first bearing 22 is a tapered roller bearing, and the first bearing 22 can simultaneously bear the force along the direction of the axis of the first rotating shaft 20a and the force along the direction of the axis of the second rotating shaft 20b, thereby improving the stability of the wind power generation device 100. The second bearing 24 can be a general bearing, such as a deep groove ball bearing.

[0049] It is worth noting that, in some embodiments, a bearing sleeve 25 is further disposed between the wind-seeking inner cylinder 21 and the wind-seeking outer cylinder 23. Along the second direction D2 where the axis of the second rotating shaft 20b is located, the bearing sleeve 25 is disposed between the first bearing 22 and the second rotating shaft 20b. Through the bearing sleeve 25, the arrangement of the bearing sleeve 25 can ensure smooth rotation between the wind-seeking inner cylinder 21 and the wind-seeking outer cylinder 23. In addition, the use of the bearing sleeve 25 also helps to disperse and withstand vibrations caused by wind force, thereby further improving the stability and durability of the entire wind power generation device 100.

[0050] It is worth noting that when the wind power generation device 100 is provided with a gear box 70, the wind-seeking outer cylinder 23 can be specifically fixed to the gear box 70, so that when the wind-seeking outer cylinder 23 rotates, it can drive the gear box 70, the first rotating shaft 20a and the wind wheel structure 10 to rotate synchronously, thereby realizing the wind-seeking function.

[0051] In some embodiments, the wind power generation device 100 further includes an anemometer 4. The anemometer 4 can be disposed on the second bearing 24. By disposing the anemometer 4, changes in wind speed can be monitored in real time.

[0052] In some embodiments, the wind power generation device 100 further includes a lightning rod 5, and the lightning rod 5 can be disposed on the second bearing 24. The arrangement of the lightning rod 5 can effectively protect the wind power generation device 100 from being damaged by lightning strikes.

[0053] In order to facilitate readers to understand the design concept of the wind power generation device 100 provided in the embodiment of the present application, the advantages of the wind power generation device 100 are now described by example. Figure 3 The wind power generation device 100 includes two wind rotor structures ( Figure 3 (not shown), the first rotating shaft 20a, the first bevel gear 30a, two first permanent magnetic suspension bearings 40a, two third permanent magnetic suspension bearings 40c, the second rotating shaft 20b, the second bevel gear 30b, two second permanent magnetic suspension bearings 40b, the tapered roller bearing 40d, the limiter 3 and the generator ( Figure 3 not shown).

[0054] Among them, the rotation direction of the first bevel gear 30a is left-handed, and the rotation direction of the second bevel gear 30b is left-handed. The two first permanent magnetic suspension bearings 40a and the two third permanent magnetic suspension bearings 40c are both left-push permanent magnetic suspension bearings, and the second permanent magnetic suspension bearings 40b are downward-push permanent magnetic suspension bearings. Along the direction of the axis of the first rotating shaft 20a (i.e., the first direction D1 / horizontal direction), the magnetization directions of the outer rings 40a1 of the two first permanent magnetic suspension bearings 40a are both facing left, and the magnetization directions of the inner rings 40a2 of the two first permanent magnetic suspension bearings 40a are both facing right. Among them, the magnetization directions of the outer rings 40c1 of the two third permanent magnetic suspension bearings 40c are both facing left, and the magnetization directions of the inner rings 40c of the two third permanent magnetic suspension bearings 40c are both facing right. Along the direction of the axis of the second rotating shaft 20b (i.e., the second direction D2 / vertical direction), the outer rings 40b1 of the two second permanent magnetic suspension bearings 40b are magnetized downward, and the inner rings 40b2 of the two second permanent magnetic suspension bearings 40b are magnetized upward.

[0055] Figure 3 In F l1 is the suspension force exerted on the first rotating shaft 20a at one of the first permanent magnetic suspension bearings 40a; Figure 3 In G 1 is the gravity exerted on the first rotating shaft 20a, Figure 3 In F d1 is the force exerted by the first bevel gear 30a on the first rotating shaft 20a. Since the first bevel gear 30a rotates in the left direction, F d1 The direction is toward the right; Figure 3 In F p1 is the force applied by one of the first permanent magnetic suspension bearings 40a to the first rotating shaft 20a. Since the direction of the force applied by the first permanent magnetic suspension bearing 40a to the first rotating shaft 20a is opposite to the direction of the force applied by the first bevel gear 30a to the first rotating shaft 20a, the first permanent magnetic suspension bearing 40a is a left-thrust permanent magnetic suspension bearing. F p1 The direction is toward the left. Figure 3 In F l2 is the suspension force exerted on the first rotating shaft 20a at one of the third permanent magnetic suspension bearings 40c; Figure 3 In F p2is the force exerted by one of the third permanent magnetic suspension bearings 40c on the first rotating shaft 20a. Since the direction of the force exerted by the third permanent magnetic suspension bearing 40c on the first rotating shaft 20a is opposite to the direction of the force exerted by the first bevel gear 30a on the first rotating shaft 20a, the third permanent magnetic suspension bearing 40c is a left-thrust permanent magnetic suspension bearing. F p2 The direction is toward the left. Figure 3 In F l3 is the suspension force received by the first rotating shaft 20a at another of the third permanent magnetic suspension bearings 40c; Figure 3 In F p3 is the force exerted by another of the first permanent magnetic suspension bearings 40a on the first rotating shaft 20a. Since the direction of the force exerted by the first permanent magnetic suspension bearing 40a on the first rotating shaft 20a is opposite to the direction of the force exerted by the first bevel gear 30a on the first rotating shaft 20a, the first permanent magnetic suspension bearing 40a is a left-thrust permanent magnetic suspension bearing. F p3 The direction is toward the left. Figure 3 In F l4 is the suspension force exerted on the first rotating shaft 20a at another of the first permanent magnetic suspension bearings 40a; Figure 3 In F p4 is the force exerted by another of the first permanent magnetic suspension bearings 40a on the first rotating shaft 20a. Since the direction of the force exerted by the first permanent magnetic suspension bearing 40a on the first rotating shaft 20a is opposite to the direction of the force exerted by the first bevel gear 30a on the first rotating shaft 20a, the first permanent magnetic suspension bearing 40a is a left-thrust permanent magnetic suspension bearing. F p4 The direction is toward the left.

[0056] According to Enshaw's theorem, there are both maximum and minimum potential energy. Figure 3 The first rotating shaft 20a shown is decomposed according to the Cartesian coordinate system. Assuming that the second direction D2 pointing upward is the y direction, assuming that the first direction D1 pointing rightward is the z direction, assuming that the direction perpendicular to the paper surface and outward from the paper surface is the x direction, then in the x direction, there are potential energy minima for displacement and rotation in the y direction, and there is no potential energy maximum and minimum for free rotation in the z direction, but there is a potential energy maximum for displacement in the z direction, that is:

[0057]

[0058] Therefore, if the structure is to be stable, it is necessary to add mechanical constraints in the z direction, namely:

[0059]

[0060] See also Figure 4 , Figure 4 The horizontal axis is the z direction, and the vertical axis is the U direction. M Represents potential energy. When mechanical constraints are added in the z direction, for example, the first bevel gear 30a provided in the embodiment of the present application is subjected to spatial force, the force exerted by the first permanent magnetic suspension bearing 40a and the third permanent magnetic suspension bearing 40c on the first rotating shaft 20a can be constrained, thereby hindering the reduction of the potential energy of the first permanent magnetic suspension bearing 40a and the third permanent magnetic suspension bearing 40c, and improving the suspension stability of the wind power generation device 100 in the first direction D1.

[0061] Figure 3 In G 2 is the gravity exerted on the second rotating shaft 20b, Figure 3 In F d2 is the force exerted by the second bevel gear 30b on the second rotating shaft 20b. Since the second bevel gear 30b rotates in the left direction, F d2 The direction is upward; Figure 3 In F p5 is the force exerted by one of the second permanent magnetic bearings 40b on the second rotating shaft 20b. Since the direction of the force exerted by the second permanent magnetic bearing 40b on the second rotating shaft 20b is opposite to the direction of the force exerted by the second bevel gear 30b on the second rotating shaft 20b, and the second permanent magnetic bearing 40b is a push-down permanent magnetic bearing, then F p5 Direction is downward. Figure 3 In F p6 is the force exerted by one of the second permanent magnetic bearings 40b on the second rotating shaft 20b. Since the direction of the force exerted by the second permanent magnetic bearing 40b on the second rotating shaft 20b is opposite to the direction of the force exerted by the second bevel gear 30b on the second rotating shaft 20b, and the second permanent magnetic bearing 40b is a push-down permanent magnetic bearing, then F p6 Direction is downward.

[0062] according to Figure 3The second rotating shaft 20b shown is decomposed according to the Cartesian coordinate system. In the x-direction and z-direction, there are potential energy minima for displacement and rotation. There is no potential energy maximum and minimum for free rotation in the y-direction, but there is a potential energy maximum for displacement in the y-direction, that is:

[0063]

[0064] Therefore, if the structure is to be stable, it is necessary to add mechanical constraints in the y direction. When mechanical constraints are added in the y direction, for example, the second bevel gear 30b provided in the embodiment of the present application is subjected to spatial force, the force of the second permanent magnetic suspension bearing 40b on the second rotating shaft 20b can be constrained, thereby hindering the reduction of the potential energy of the second permanent magnetic suspension bearing 40b, and improving the suspension stability of the wind power generation device 100 in the second direction D2. That is, by setting the first bevel gear 30a and the second bevel gear 30b, the overall suspension stability of the wind power generation device 100 can be improved.

[0065] It should be noted that the point contact of the helical gears is the key to ensure the decoupling of the above two sets of formulas, that is, the rotational potential energy component of the first shaft 20a in the x direction will not conflict with the rotational potential energy component of the second shaft 20b in the x direction to cause instability.

[0066] The present application also provides an embodiment of an energy storage system 200, see Figure 5 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 .

[0067] 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 power generation device 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, the second relay K2 is connected to the inverter 2007, and 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, which will not be described in detail here.

[0068] In the embodiment of the present application, the wind power generation device 100 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 of the controller 2002 and matches the voltage to charge the energy storage battery 2001 through the first relay K1. When the energy storage 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 way of the second relay K2, which can supply power to the AC load CL, and the other way can 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.

[0069] 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 may also be implemented.

[0070] It should be noted that the preferred embodiments of the present application are given in the specification and drawings of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described in the specification. These embodiments are not used as additional limitations on the content of the present application. The purpose of providing these embodiments is to make the understanding of the disclosure of the present application more thorough and comprehensive. In addition, the above-mentioned technical features continue to be combined with each other to form various embodiments not listed above, which are all regarded as the scope of the description of the present application; further, for ordinary technicians in this field, they can be improved or transformed according to the above description, and all these improvements and transformations should belong to the scope of protection of the claims attached to the present application.

Claims

1. A wind power generation device, characterized in that: include: A wind wheel structure, comprising blades and a wind box, wherein the blades are accommodated in the wind box; a first rotating shaft, the blades are arranged on the first rotating shaft, the direction of the axis of the first rotating shaft is a first direction, and the blades are used for providing wind force to make the first rotating shaft rotate around the first direction; A first bevel gear, disposed on the first rotating shaft; a first permanent magnetic suspension bearing, wherein the first rotating shaft is inserted into the first permanent magnetic suspension bearing, and a direction of a force exerted by the first permanent magnetic suspension bearing on the first rotating shaft is opposite to a direction of a force exerted by the first bevel gear on the first rotating shaft; A second rotating shaft, arranged perpendicularly to the first rotating shaft; a second helical gear, disposed on the second rotating shaft, the second helical gear meshing with the first helical gear; a second permanent magnetic suspension bearing, wherein the second rotating shaft is inserted into the second permanent magnetic suspension bearing, and a direction of a force exerted by the second permanent magnetic suspension bearing on the second rotating shaft is opposite to a direction of a force exerted by the second bevel gear on the second rotating shaft; a generator, wherein an input end of the generator is connected to the second rotating shaft; The wind power generation device also includes a gearbox and a third permanent magnetic suspension bearing. The first helical gear and the second helical gear are accommodated in the gearbox. The third permanent magnetic suspension bearing is arranged in the gearbox. The first rotating shaft is inserted in the third permanent magnetic suspension bearing. The direction of the force exerted by the third permanent magnetic suspension bearing on the first rotating shaft is opposite to the direction of the force exerted by the first helical gear on the first rotating shaft.

2. The wind power generation device according to claim 1, characterized in that: The number of the wind wheel structures is two, and the two wind wheel structures are symmetrically arranged at two ends of the first rotating shaft; The number of the first permanent magnetic suspension bearings is two, one end of the first rotating shaft is inserted into one of the first permanent magnetic suspension bearings, and the other end of the first rotating shaft is inserted into another of the first permanent magnetic suspension bearings.

3. The wind power generation device according to claim 2, characterized in that: The first permanent magnetic suspension bearing is arranged on a side of the bellows away from the first bevel gear, and the first rotating shaft penetrates through the bellows and is inserted into the first permanent magnetic suspension bearing.

4. The wind power generation device according to claim 3, characterized in that: The wind power generation device further includes a limiter, which is disposed on the first rotating shaft and is used to bear the force exerted by the two first permanent magnetic bearings on the first rotating shaft.

5. The wind power generation device according to claim 1, characterized in that: The wind power generation device further includes a support member, and the support member is supported between the gear box and the wind box.

6. The wind power generation device according to claim 5, characterized in that: The support member is provided with a bearing hole, and the third permanent magnetic suspension bearing is provided in the bearing hole.

7. The wind power generation device according to claim 1, characterized in that: The wind power generation device further comprises a wind-seeking mechanism, wherein the wind-seeking mechanism comprises a wind-seeking inner cylinder, a first bearing, a wind-seeking outer cylinder and a second bearing; The wind-seeking inner cylinder is sleeved on the second rotating shaft; The wind-seeking outer cylinder is fixed to the first bearing and the second bearing respectively; The inner ring of the first bearing forms a rotation pair with the wind-seeking inner cylinder, the wind-seeking outer cylinder forms a rotation pair with the wind-seeking inner cylinder, the inner ring of the second bearing forms a rotation pair with the wind-seeking inner cylinder, and the wind-seeking inner cylinder is arranged on the generator; The wind-finding outer cylinder is connected to the first rotating shaft.

8. The wind power generation device according to claim 7, characterized in that: The first helical gear and the second helical gear are accommodated in the gear box, and the wind-finding outer cylinder is fixed to the gear box.

9. The wind power generation device according to claim 1, characterized in that: The wind power generation device further includes a tapered roller bearing, which is arranged on the generator, and the second rotating shaft is inserted in the second permanent magnetic suspension bearing and the tapered roller bearing in sequence.

10. The wind power generation device according to claim 1, characterized in that: The wind power generation device further comprises a controller and a column, the generator is arranged on the column, and the controller surrounds the column.

11. An energy storage system, characterized in that: A wind power generation device comprising an energy storage battery as described in any one of claims 1 to 10, wherein the energy storage battery is connected to the wind power generation device.

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