Vertical axis wind turbine

Abstract

The invention provides a vertical axis wind driven generator, which comprises a generator comprising a stator, a rotor and a wind blade, the wind blade is rotatably arranged on the stator around the vertical axis of the wind blade, and the rotor is connected with the wind blade; the floating bodies comprise a first floating body and a second floating body, the first floating body is connected with one of the rotor and the stator, and the second floating body is connected with the other one of the rotor and the stator; an inner ring of the bearing is connected with the first floating body, and an outer ring of the bearing is connected with the second floating body. Through the technical scheme provided by the invention, the problem of excessive wear of the main bearing of the vertical axis fan in the related technology can be solved.

Description

Technical Field

[0001] The present invention relates to the technical field of offshore wind power, and in particular to a vertical axis wind turbine. Background Art

[0002] At present, commercial power generation devices are mainly horizontal axis wind turbines, but vertical axis wind turbines still have many significant advantages over horizontal axis wind turbines. First, vertical axis wind turbines do not need a separate yaw device to adjust the relative position of the wind turbine and the wind direction, and the structure is simple; second, the gearbox and generator of the vertical axis wind turbine and other large equipment are installed close to the ground (sea surface), which is convenient for equipment installation and later maintenance; third, the blade manufacturing difficulty of the vertical axis wind turbine is significantly lower than that of the horizontal axis wind turbine. The above advantages make vertical axis wind turbines have the potential to achieve a unit power generation cost lower than that of horizontal axis wind turbines.

[0003] In the relevant technology, the low center of gravity characteristic of the vertical axis wind turbine in particular makes the floating vertical axis wind turbine have better stability than the horizontal axis floating wind turbine, which can effectively reduce the cost of the floating body.

[0004] However, the capacity of vertical axis fans is still at the KW level, and the large-scale development of vertical axis fans is restricted by their own shortcomings. Among them, the more serious problem is the excessive wear of the main bearing. The impeller system transmits mechanical energy to the generator through the main shaft to enable the generator to generate electricity. The main bearing is arranged between the generator and the main shaft. The main bearing needs to bear the gravity of the main shaft and the impeller system, which causes it to wear seriously. Summary of the invention

[0005] The present invention provides a vertical axis wind turbine to solve the problem of excessive wear of the main bearing of the vertical axis wind turbine in the related art.

[0006] The present invention provides a vertical axis wind turbine generator, which comprises: a generator, comprising a stator, a rotor and wind blades, wherein the wind blades are rotatably arranged on the stator around their vertical axes, and the rotor is connected to the wind blades; a floating body, comprising a first floating body and a second floating body, wherein the first floating body is connected to one of the rotor and the stator, and the second floating body is connected to the other of the rotor and the stator; and a bearing, wherein the inner ring of the bearing is connected to the first floating body, and the outer ring of the bearing is connected to the second floating body.

[0007] Furthermore, the vertical axis wind turbine further comprises a limiting structure arranged between the first floating body and the second floating body to limit the relative movement of the first floating body and the second floating body in the vertical direction.

[0008] Furthermore, the limiting structure includes: a limiting groove extending in a circumferential direction, the plane in which the circumferential direction is located is perpendicular to the vertical direction, and the limiting groove is arranged on one of the first floating body and the second floating body; a limiting block is movably arranged in the limiting groove along the extension direction of the limiting groove, and the limiting block is arranged on the other of the first floating body and the second floating body.

[0009] Furthermore, the limiting groove and / or the limiting block is an annular structure extending along the circumferential direction.

[0010] Furthermore, the vertical axis wind turbine further comprises a heave box, and both the heave box and the rotor are connected to the first floating body.

[0011] Furthermore, the wind blades, the rotor, the first floating body and the heave box are coaxially arranged.

[0012] Furthermore, the vertical axis wind turbine further comprises a mooring member, wherein the mooring member and the stator are both connected to the second floating body.

[0013] Furthermore, the inner ring of the bearing is sleeved on the first floating body, and the second floating body is sleeved on the outer ring of the bearing.

[0014] Furthermore, the vertical axis wind turbine also includes electrical accessories, and both the electrical accessories and the stator are connected to the second floating body.

[0015] Furthermore, the wind blade includes: a blade shaft extending in the vertical direction, the blade shaft is rotatably arranged on the stator around its vertical axis, and the rotor is connected to the blade shaft; a blade member is sleeved on the upper part of the blade shaft and connected to the blade shaft, and the blade member extends in a direction away from the blade shaft.

[0016] By applying the technical solution of the present invention, a vertical axis wind turbine includes a generator, a float and a bearing. During the process of generating electricity by the generator, the wind blade drives the rotor to rotate relative to the stator around the vertical axis of the wind blade. Since the first float is connected to one of the rotor and the stator, and the second float is connected to the other of the rotor and the stator, the inner ring of the bearing is connected to the first float, and the outer ring of the bearing is connected to the second float, the first float and the second float rotate relative to each other around the vertical axis of the wind blade. The buoyancy of the first float can be balanced with the gravity of the first float and the gravity of other components arranged on the first float, and the buoyancy of the second float can be balanced with the gravity of the second float and the gravity of other components arranged on the second float, so as to balance the gravity of the whole machine, reduce the relative force between the inner ring and the outer ring of the bearing in the vertical direction, and reduce the wear of the bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0018] Figure 1 A schematic structural diagram of a vertical axis wind turbine generator according to an embodiment of the present invention is shown;

[0019] Figure 2 A schematic structural diagram of a blade shaft, a rotor and a first floating body of a vertical axis wind turbine provided according to an embodiment of the present invention is shown.

[0020] The above drawings include the following reference numerals:

[0021] 11. stator; 12. rotor; 13. wind blade; 131. blade shaft; 132. blade member;

[0022] 21. The first floating body; 22. The second floating body;

[0023] 30. Swing box;

[0024] 40. Mooring parts. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] like Figure 1 to Figure 2 As shown, an embodiment of the present invention provides a vertical axis wind turbine, which includes a generator, a float and a bearing. The generator includes a stator 11, a rotor 12 and a wind blade 13. The wind blade 13 is rotatably arranged on the stator 11 around its vertical axis. The rotor 12 is connected to the wind blade 13. The float includes a first float 21 and a second float 22. The first float 21 is connected to one of the rotor 12 and the stator 11, and the second float 22 is connected to the other of the rotor 12 and the stator 11. The inner ring of the bearing is connected to the first float 21, and the outer ring of the bearing is connected to the second float 22.

[0027] The vertical axis wind turbine provided by the present embodiment is applied. The vertical axis wind turbine includes a generator, a float and a bearing. During the process of generating electricity by the generator, the wind blade 13 drives the rotor 12 to rotate relative to the stator 11 around the vertical axis of the wind blade 13. Since the first float 21 is connected to one of the rotor 12 and the stator 11, and the second float 22 is connected to the other of the rotor 12 and the stator 11, the inner ring of the bearing is connected to the first float 21, and the outer ring of the bearing is connected to the second float 22, so that the first float 21 and the second float 22 rotate relative to each other around the vertical axis of the wind blade 13. The buoyancy of the first float 21 can be balanced with the gravity of the first float 21 and the gravity of other components arranged on the first float 21, and the buoyancy of the second float 22 can be balanced with the gravity of the second float 22 and the gravity of other components arranged on the second float 22, so as to balance the gravity of the whole machine, reduce the relative force between the inner ring and the outer ring of the bearing in the vertical direction, and reduce the wear of the bearing.

[0028] In this embodiment, the vertical axis wind turbine also includes a limiting structure arranged between the first float 21 and the second float 22 to limit the relative movement of the first float 21 and the second float 22 in the vertical direction, thereby avoiding relative vertical movement between the first float 21 and the second float 22, thereby avoiding relative vertical movement between the inner ring and the outer ring, and improving the reliability of the fit between the inner ring and the outer ring.

[0029] In this embodiment, the limiting structure includes a limiting groove and a limiting block, the limiting groove extends in the circumferential direction, the plane where the circumferential direction is located is perpendicular to the vertical direction, the limiting groove is arranged on one of the first floating body 21 and the second floating body 22, the limiting block is movably arranged in the limiting groove along the extension direction of the limiting groove, and the limiting block is arranged on the other of the first floating body 21 and the second floating body 22. The limiting structure adopting the above structure, using the nested limiting groove and the limiting block, not only limits the relative movement of the first floating body 21 and the second floating body 22 in the vertical direction, but also has the advantages of easy processing and simple structure.

[0030] In this embodiment, the limiting groove and / or the limiting block is an annular structure extending in the circumferential direction, which increases the limiting range of the limiting structure in the circumferential direction and improves the reliability of the limiting structure when the first floating body 21 and the second floating body 22 rotate relative to each other around the vertical axis of the wind blade 13.

[0031] like Figure 1As shown, the vertical axis wind turbine further includes a heave box 30, and the heave box 30 and the rotor 12 are both connected to the first buoy 21. The heave box 30 is ballasted with high-density concrete to lower the center of gravity of the vertical axis wind turbine. Compared with the conventional single-column buoy, this embodiment can reduce the requirement of the vertical axis wind turbine for water depth, and the vertical axis wind turbine can adapt to more sea areas with medium water depth or below.

[0032] like Figure 1 and Figure 2 As shown, the wind blade 13, the rotor 12, the first float 21 and the heave box 30 are coaxially arranged. When the wind blade 13 rotates, the rotor 12, the first float 21 and the heave box 30 rotate together around the vertical axis of the wind blade 13, and by coaxially arranging the wind blade 13, the rotor 12, the first float 21 and the heave box 30, the center of gravity of the wind blade 13, the rotor 12, the first float 21 and the heave box 30 is located on the same axis extending in the vertical direction, so that the gravity of the wind blade 13, the gravity of the rotor 12, the gravity and buoyancy of the first float 21 and the gravity of the heave box 30 are coaxially arranged, thereby improving the stability of the vertical axis wind turbine and preventing the vertical axis wind turbine from tipping over.

[0033] like Figure 1 As shown, the vertical axis wind turbine further includes a mooring member 40. The mooring member 40 and the stator 11 are both connected to the second floating body 22. The mooring member 40 is used to stabilize the vertical axis wind turbine to prevent the vertical axis wind turbine from drifting on the water surface.

[0034] In this embodiment, the inner ring of the bearing is sleeved on the first floating body 21, and the second floating body 22 is sleeved on the outer ring of the bearing.

[0035] In this embodiment, the vertical axis wind turbine further includes electrical accessories, and both the electrical accessories and the stator 11 are connected to the second floating body 22 .

[0036] like Figure 1 As shown, the wind blade 13 includes a blade shaft 131 and a blade member 132. The blade shaft 131 extends in the vertical direction. The blade shaft 131 is rotatably arranged on the stator 11 around its vertical axis. The rotor 12 is connected to the blade shaft 131. The blade member 132 is sleeved on the upper part of the blade shaft 131 and connected to the blade shaft 131. The blade member 132 extends in a direction away from the blade shaft 131.

[0037] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0038] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0039] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0040] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0041] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0042] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A vertical axis wind turbine, characterized in that: The vertical axis wind turbine generator comprises: A generator comprises a stator (11), a rotor (12) and a wind blade (13), wherein the wind blade (13) is rotatably arranged on the stator (11) around its vertical axis, and the rotor (12) is connected to the wind blade (13); A floating body, comprising a first floating body (21) and a second floating body (22), wherein the first floating body (21) is connected to one of the rotor (12) and the stator (11), and the second floating body (22) is connected to the other of the rotor (12) and the stator (11); A bearing, wherein the inner ring of the bearing is connected to the first floating body (21), and the outer ring of the bearing is connected to the second floating body (22).

2. The vertical axis wind turbine according to claim 1, characterized in that: The vertical axis wind turbine further comprises a limiting structure arranged between the first floating body (21) and the second floating body (22) to limit the relative movement of the first floating body (21) and the second floating body (22) in the vertical direction.

3. The vertical axis wind turbine according to claim 2, characterized in that: The limiting structure comprises: a limiting groove extending in a circumferential direction, wherein a plane in the circumferential direction is perpendicular to the vertical direction, and wherein the limiting groove is arranged on one of the first floating body (21) and the second floating body (22); A limit block is movably arranged in the limit groove along the extension direction of the limit groove, and the limit block is arranged on the other of the first floating body (21) and the second floating body (22).

4. The vertical axis wind turbine according to claim 3, characterized in that: The limiting groove and / or the limiting block is an annular structure extending along the circumferential direction.

5. The vertical axis wind turbine according to claim 1, characterized in that: The vertical axis wind turbine further comprises a heave box (30), wherein the heave box (30) and the rotor (12) are both connected to the first floating body (21).

6. The vertical axis wind turbine according to claim 5, characterized in that: The wind blade (13), the rotor (12), the first floating body (21) and the heave box (30) are coaxially arranged.

7. The vertical axis wind turbine according to claim 1, characterized in that: The vertical axis wind turbine further comprises a mooring member (40), wherein the mooring member (40) and the stator (11) are both connected to the second floating body (22).

8. The vertical axis wind turbine according to claim 1, characterized in that: The inner ring of the bearing is sleeved on the first floating body (21), and the second floating body (22) is sleeved on the outer ring of the bearing.

9. The vertical axis wind turbine according to claim 1, characterized in that: The vertical axis wind turbine further comprises an electrical accessory, wherein the electrical accessory and the stator (11) are both connected to the second floating body (22).

10. The vertical axis wind turbine according to claim 1, characterized in that: The wind blade (13) comprises: A blade shaft (131) extends in a vertical direction, the blade shaft (131) is rotatably arranged on the stator (11) around its vertical axis, and the rotor (12) is connected to the blade shaft (131); The blade member (132) is sleeved on the upper part of the blade shaft (131) and connected to the blade shaft (131), and the blade member (132) extends in a direction away from the blade shaft (131).

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