Offshore wind power generation device

Abstract

The invention provides an offshore wind power generation device. The offshore wind power generation device comprises a base body platform; the generator set is arranged on the base body platform and comprises a first vertical axis wind driven generator and at least two second vertical axis wind driven generators, the first vertical axis wind driven generator is located in the middle of the base body platform, and the at least two second vertical axis wind driven generators are arranged on the outer side of the first vertical axis wind driven generator in a surrounding mode; the maximum height of the second vertical axis wind turbine is smaller than that of the first vertical axis wind turbine. According to the technical scheme, the problem that the gravity center height of the offshore wind power generation device is increased due to a horizontal-axis wind turbine generator in the related technology, and consequently the offshore wind power generation device is prone to overturning can be solved.

Description

Technical Field

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

[0002] With the continuous advancement of offshore wind power development, the large-scale wind turbines and the deep sea planning of wind farms have gradually become important trends for further development.

[0003] In the related art, in order to realize the utilization of deep sea wind energy, an offshore wind power generation device includes a floating platform and a horizontal axis wind turbine set arranged on the floating platform.

[0004] However, as the rotor diameter and tower height of horizontal-axis wind turbines continue to increase, the center of gravity height of offshore wind turbines increases, making offshore wind turbines prone to capsizing, posing a major challenge to the safe and stable operation of offshore wind turbines. Summary of the invention

[0005] The present invention provides an offshore wind power generation device to solve the problem in the related art that the horizontal axis wind turbine sets increase the center of gravity height of the offshore wind power generation device, resulting in the offshore wind power generation device being easily capsized.

[0006] The present invention provides an offshore wind power generation device, which comprises: a base platform; a generator set, which is arranged on the base platform, and the generator set comprises a first vertical axis wind generator and at least two second vertical axis wind generators, the first vertical axis wind generator is located in the middle of the base platform, and the at least two second vertical axis wind generators are arranged around the outside of the first vertical axis wind generator, and the maximum height of the second vertical axis wind generator is less than the maximum height of the first vertical axis wind generator.

[0007] Furthermore, the offshore wind power generation device also includes an auxiliary starting component, the second vertical axis wind turbine is electrically connected to the auxiliary starting component, and the auxiliary starting component is drivingly connected to the first vertical axis wind turbine to drive the first vertical axis wind turbine to operate.

[0008] Furthermore, the first vertical axis wind turbine includes a first blade member and a first generator body. The first blade member is rotatably arranged on a base platform around its vertical axis. The first generator body is arranged in the middle of the base platform. The first blade member is drivingly connected to a mover of the first generator body. The auxiliary starting member can be drivingly connected to the first blade member to drive the first blade member to rotate.

[0009] Furthermore, the offshore wind power generation device also includes a switching switch, which has an input end, a first output end and a second output end. The second vertical axis wind turbine is electrically connected to the input end, and the first output end is electrically connected to the auxiliary starting component. The switching switch has a first state and a second state. When the switching switch is in the first state, the input end is connected to the first output end, and when the switching switch is in the second state, the input end is connected to the second output end.

[0010] Furthermore, the offshore wind power generation device also includes a control component and a detection component, the detection component is used to detect whether the first vertical axis wind turbine is working, and the control component is respectively connected to the switching switch and the detection component signal to control the switching switch to switch between the first state and the second state according to the detection result of the detection component.

[0011] Furthermore, the first blade member includes: a first rotating shaft, which is arranged on the base platform and extends in the vertical direction. The first rotating shaft is rotatable around its axis relative to the base platform, and the auxiliary starting member is drivingly connected to the first rotating shaft; and a first lift blade is arranged on the first rotating shaft.

[0012] Furthermore, the second vertical axis wind turbine includes a second blade member and a second generator body, the second blade member includes a second rotating shaft and a resistance blade arranged on the second rotating shaft, the second rotating shaft is arranged on a base platform extending in a vertical direction, the second rotating shaft is rotatable around its axis relative to the base platform, and the second rotating shaft is drivingly connected to the rotor of the second generator body.

[0013] Furthermore, the second blade member also includes a second lift blade arranged on the second rotating shaft.

[0014] Further, the maximum height of the second vertical axis wind turbine is less than 10% of the maximum height of the first vertical axis wind turbine.

[0015] Further, the base platform includes a floating platform.

[0016] Furthermore, the floating platform includes: a first floating body, on which a first vertical axis wind turbine is arranged; at least two second floating bodies, which are arranged around the outside of the first floating body, and at least two second floating bodies are arranged along the circumference of the first vertical axis wind turbine, and at least two second vertical axis wind turbines are arranged one by one on at least two second floating bodies; and a connecting member, which is respectively connected to the first floating body and the at least two second floating bodies.

[0017] By applying the technical solution of the present invention, an offshore wind power generation device includes a base platform and a generator set. A first vertical axis wind turbine and at least two second vertical axis wind turbines are installed on the base platform. The first vertical axis wind turbine and at least two second vertical axis wind turbines are used to capture wind energy and convert it into electrical energy. Compared with a horizontal axis wind turbine set, the use of the first vertical axis wind turbine and at least two second vertical axis wind turbines can lower the center of gravity of the wind turbine set, reduce the risk of overturning of the offshore wind power generation device, and improve the stability of the offshore wind power generation device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] 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:

[0019] Figure 1 A schematic structural diagram of an offshore wind power generation device provided in an embodiment of the present invention is shown;

[0020] Figure 2 A top view of an offshore wind power generation device provided according to an embodiment of the present invention is shown;

[0021] Figure 3 A schematic structural diagram of a second floating body and a second vertical axis wind turbine generator of an offshore wind power generation device provided in an embodiment of the present invention is shown;

[0022] Figure 4 A top view of a second floating body and a second vertical-axis wind turbine generator of an offshore wind power generation device provided in an embodiment of the present invention is shown.

[0023] The above drawings include the following reference numerals:

[0024] 10. base platform; 11. floating platform; 111. first floating body; 112. second floating body; 113. connecting piece;

[0025] 20. Generator set; 21. First vertical axis wind turbine; 211. First blade member; 2111. First rotating shaft; 2112. First lift blade; 22. Second vertical axis wind turbine; 221. Second blade member; 2211. Second rotating shaft; 2212. Resistance blade; 2213. Second lift blade. DETAILED DESCRIPTION

[0026] 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.

[0027] like Figures 1 to 4 As shown, an embodiment of the present invention provides an offshore wind power generation device, which includes a base platform 10 and a generator set 20. The generator set 20 is arranged on the base platform 10. The generator set 20 includes a first vertical axis wind turbine 21 and at least two second vertical axis wind turbines 22. The first vertical axis wind turbine 21 is located in the middle of the base platform 10, and the at least two second vertical axis wind turbines 22 are arranged around the outside of the first vertical axis wind turbine 21. The maximum height of the second vertical axis wind turbine 22 is less than the maximum height of the first vertical axis wind turbine 21.

[0028] The offshore wind power generation device provided by the present embodiment includes a base platform 10 and a generator set 20. A first vertical axis wind turbine 21 and at least two second vertical axis wind turbines 22 are installed on the base platform 10. The first vertical axis wind turbine 21 and at least two second vertical axis wind turbines 22 are used to capture wind energy and convert it into electrical energy. Compared with a horizontal axis wind turbine set, the use of the first vertical axis wind turbine 21 and at least two second vertical axis wind turbines 22 can lower the center of gravity of the generator set 20, reduce the risk of overturning of the offshore wind power generation device, and improve the stability of the offshore wind power generation device.

[0029] Specifically, compared with the generator body of the horizontal axis wind turbine set, the generator body of the first vertical axis wind turbine 21 and at least two second vertical axis wind turbines 22 adopted in this embodiment can be installed in an area closer to the water surface, thereby reducing the installation height of the generator body, so as to further lower the center of gravity of the generator set 20 and effectively reduce the difficulty and cost of operation and maintenance of the generator set 20.

[0030] Furthermore, since the maximum height of the second vertical axis wind turbine 22 is smaller than the maximum height of the first vertical axis wind turbine 21, by arranging the first vertical axis wind turbine 21 in the middle of the base platform 10 and surrounding at least two second vertical axis wind turbines 22 on the outside of the first vertical axis wind turbine 21, the stability of the placement of the generator set 20 on the base platform 10 can be improved, the direct impact of wind and waves on the equipment can be reduced, and the risk of capsizing of the offshore wind power generation device can be reduced.

[0031] It should be noted that at least two second vertical-axis wind turbines 22 are disposed symmetrically with respect to the center of the first vertical-axis wind turbine 21 , and the number of the second vertical-axis wind turbines 22 is an even number.

[0032] In this embodiment, the offshore wind power generation device further includes an auxiliary starting component, the second vertical axis wind turbine 22 is electrically connected to the auxiliary starting component, and the auxiliary starting component is drivingly connected to the first vertical axis wind turbine 21 to drive the first vertical axis wind turbine 21 to operate.

[0033] It should be noted that, since the maximum height of the second vertical axis wind turbine 22 is smaller than the maximum height of the first vertical axis wind turbine 21 , the starting wind speed required for the second vertical axis wind turbine 22 is lower than the starting wind speed required for the first vertical axis wind turbine 21 .

[0034] Thus, when the wind speed is greater than the starting wind speed required by the second vertical axis wind turbine 22 and less than the starting wind speed required by the first vertical axis wind turbine 21, the second vertical axis wind turbine 22 starts to generate electricity first, and the second vertical axis wind turbine 22 provides electrical energy to the auxiliary starting component so that the auxiliary starting component assists the first vertical axis wind turbine 21 in starting, thereby reducing the starting wind speed required by the first vertical axis wind turbine 21, which can effectively improve the problem of poor starting performance of the generator set 20 and expand the wind energy utilization range of offshore wind power generation equipment.

[0035] like Figure 1 and Figure 2 As shown, the first vertical axis wind turbine 21 includes a first blade member 211 and a first generator body. The first blade member 211 is rotatably arranged on the base platform 10 around its vertical axis. The first generator body is arranged in the middle of the base platform 10. The first blade member 211 is drivingly connected to the mover of the first generator body. The auxiliary starting member can be drivingly connected to the first blade member 211 to drive the first blade member 211 to rotate.

[0036] Specifically, when the wind speed is greater than the starting wind speed required by the second vertical axis wind turbine 22 and less than the starting wind speed required by the first vertical axis wind turbine 21 , the second vertical axis wind turbine 22 provides power to the auxiliary starting member so that the auxiliary starting member drives the first blade member 211 to rotate.

[0037] In this embodiment, the offshore wind power generation device also includes a switching switch, which has an input end, a first output end and a second output end. The second vertical axis wind turbine 22 is electrically connected to the input end, and the first output end is electrically connected to the auxiliary starting component. The switching switch has a first state and a second state. When the switching switch is in the first state, the input end is connected to the first output end, and when the switching switch is in the second state, the input end is connected to the second output end.

[0038] It should be noted that the resistance that needs to be overcome when the first blade 211 switches from stationary to rotating is static friction. After the first blade 211 rotates, the rotation resistance of the first blade 211 is dynamic friction (smaller than the static friction that needs to be overcome when the first blade 211 switches from stationary to rotating), that is, the operating resistance of the first vertical axis wind turbine 21 after starting is smaller than the starting resistance of the first vertical axis wind turbine 21.

[0039] Thus, when the switching switch is in the first state, the second vertical axis wind turbine 22 can start the first vertical axis wind turbine 21 through the auxiliary starting member. After the first vertical axis wind turbine 21 is started, if the wind speed is sufficient to overcome the operating resistance of the first vertical axis wind turbine 21, the switching switch can be switched to the second state, and the electric energy obtained by the second vertical axis wind turbine 22 can be combined with the electric energy obtained by the first vertical axis wind turbine 21 for external transmission or energy storage.

[0040] In this embodiment, the offshore wind power generation device also includes a control component and a detection component. The detection component is used to detect whether the first vertical axis wind turbine 21 is working. The control component is respectively connected to the switching switch and the detection component signal to control the switching switch to switch between the first state and the second state according to the detection result of the detection component.

[0041] By using the above-mentioned control element and detection element, the control element is used to control the switch to switch between the first state and the second state according to whether the first vertical axis wind turbine 21 is working, thereby improving the operation automation level of the offshore wind power generation device.

[0042] Specifically, the detection component detects whether the first vertical axis wind turbine 21 is working, including at least the following two embodiments:

[0043] (1) The detection member detects whether the first blade member 211 or the mover of the first generator body is rotating;

[0044] (2) The detection member detects whether the first generator body generates electricity.

[0045] like Figure 1 and Figure 2 As shown, the first blade member 211 includes a first rotating shaft 2111 and a first lift blade 2112. The first rotating shaft 2111 is extended in the vertical direction and is arranged on the base platform 10. The first rotating shaft 2111 is rotatable around its axis relative to the base platform 10. The auxiliary starting member is drivingly connected to the first rotating shaft 2111, and the first lift blade 2112 is arranged on the first rotating shaft 2111.

[0046] With the first blade member 211 having the above structure, under the premise of a certain wind speed, the first lift blade 2112 has the advantages of high rotation speed, low center of gravity, small blade area and high wind energy utilization rate compared with the resistance blade.

[0047] like Figures 2 to 4 As shown, the second vertical axis wind turbine 22 includes a second blade member 221 and a second generator body. The second blade member 221 includes a second rotating shaft 2211 and a resistance blade 2212 arranged on the second rotating shaft 2211. The second rotating shaft 2211 is extended along the vertical direction and is arranged on the base platform 10. The second rotating shaft 2211 is rotatable around its axis relative to the base platform 10, and the second rotating shaft 2211 is drivingly connected to the rotor of the second generator body.

[0048] Compared with lift blades, the second blade member 221 and the resistance blade 2212 adopting the above structure have the advantages of simple structure, fewer transmission pairs, easy installation and maintenance, and low starting wind speed requirement.

[0049] like Figures 2 to 4 As shown, the second blade member 221 also includes a second lift blade 2213 disposed on the second rotating shaft 2211. With the second lift blade 2213 of the above structure, under the premise of a certain wind speed, the second lift blade 2213 has the advantages of high rotation speed, low center of gravity, small blade area and high wind energy utilization rate compared with the resistance blade. In an environment with a high wind speed, the power generation efficiency of the second vertical axis wind turbine 22 is improved.

[0050] Specifically, the top view of the resistance blade 2212 presents an "S"-shaped structure, and the top view of the first lift blade 2112 and the top view of the second lift blade 2213 both present a straight line structure.

[0051] In this embodiment, the maximum height of the second vertical axis wind turbine 22 is less than 10% of the maximum height of the first vertical axis wind turbine 21. The vertical axis wind turbine will form a certain airflow field when running. The above structure can reduce the interference of the airflow field of the second vertical axis wind turbine 22 on the first vertical axis wind turbine 21.

[0052] like Figure 1 As shown, the base platform 10 includes a floating platform 11 to meet the use requirements in deep sea areas.

[0053] like Figures 1 to 4As shown, the floating platform 11 includes a first floating body 111, a connecting member 113 and at least two second floating bodies 112, a first vertical axis wind turbine 21 is arranged on the first floating body 111, at least two second floating bodies 112 are arranged around the outside of the first floating body 111, at least two second floating bodies 112 are arranged along the circumference of the first vertical axis wind turbine 21, at least two second vertical axis wind turbines 22 are arranged one by one on at least two second floating bodies 112, and the connecting member 113 is respectively connected to the first floating body 111 and the at least two second floating bodies 112.

[0054] 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.

[0055] 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 actual proportional relationships. The technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, methods 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.

[0056] 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.

[0057] 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.

[0058] 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.

[0059] 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. An offshore wind power generation device, characterized in that: The offshore wind power generation device comprises: Base platform (10); A generator set (20) is arranged on the base platform (10), and the generator set (20) comprises a first vertical axis wind generator (21) and at least two second vertical axis wind generators (22), wherein the first vertical axis wind generator (21) is located in the middle of the base platform (10), and at least two second vertical axis wind generators (22) are arranged around the outside of the first vertical axis wind generator (21), and the maximum height of the second vertical axis wind generator (22) is less than the maximum height of the first vertical axis wind generator (21).

2. The offshore wind power generation device according to claim 1, characterized in that: The offshore wind power generation device further comprises an auxiliary starting component, the second vertical axis wind turbine (22) is electrically connected to the auxiliary starting component, and the auxiliary starting component is drivingly connected to the first vertical axis wind turbine (21) to drive the first vertical axis wind turbine (21) to operate.

3. The offshore wind power generation device according to claim 2, characterized in that: The first vertical axis wind turbine (21) comprises a first blade member (211) and a first generator body, wherein the first blade member (211) is rotatably arranged on the base platform (10) around its vertical axis, the first generator body is arranged in the middle of the base platform (10), the first blade member (211) is drivingly connected to a mover of the first generator body, and the auxiliary starting member can be drivingly connected to the first blade member (211) to drive the first blade member (211) to rotate.

4. The offshore wind power generation device according to claim 2, characterized in that: The offshore wind power generation device also includes a switching switch, the switching switch has an input end, a first output end and a second output end, the second vertical axis wind turbine (22) is electrically connected to the input end, the first output end is electrically connected to the auxiliary starting component, the switching switch has a first state and a second state, when the switching switch is in the first state, the input end is connected to the first output end, and when the switching switch is in the second state, the input end is connected to the second output end.

5. The offshore wind power generation device according to claim 4, characterized in that: The offshore wind power generation device further comprises a control component and a detection component, wherein the detection component is used to detect whether the first vertical axis wind turbine (21) is working, and the control component is respectively connected to the switching switch and the detection component signal to control the switching switch to switch between the first state and the second state according to the detection result of the detection component.

6. The offshore wind power generation device according to claim 3, characterized in that: The first blade member (211) comprises: A first rotating shaft (2111) is arranged on the base platform (10) in a manner extending in a vertical direction, the first rotating shaft (2111) is rotatable relative to the base platform (10) around its axis, and the auxiliary starting member is drivingly connected to the first rotating shaft (2111); The first lift blade (2112) is arranged on the first rotating shaft (2111).

7. The offshore wind power generation device according to claim 1, characterized in that: The second vertical axis wind turbine (22) comprises a second blade member (221) and a second generator body, the second blade member (221) comprises a second rotating shaft (2211) and a resistance blade (2212) arranged on the second rotating shaft (2211), the second rotating shaft (2211) is arranged on the base platform (10) extending in the vertical direction, the second rotating shaft (2211) is rotatable around its axis relative to the base platform (10), and the second rotating shaft (2211) is drivingly connected to the mover of the second generator body.

8. The offshore wind power generation device according to claim 7, characterized in that: The second blade member (221) further includes a second lift blade (2213) arranged on the second rotating shaft (2211).

9. The offshore wind power generation device according to claim 1, characterized in that: The maximum height of the second vertical-axis wind turbine (22) is less than 10% of the maximum height of the first vertical-axis wind turbine (21).

10. The offshore wind power generation device according to claim 1, characterized in that: The base platform (10) comprises a floating platform (11).

11. The offshore wind power generation device according to claim 10, characterized in that: The floating platform (11) comprises: A first floating body (111), wherein the first vertical-axis wind turbine (21) is arranged on the first floating body (111); At least two second floating bodies (112) are arranged around the outside of the first floating body (111), the at least two second floating bodies (112) are arranged along the circumference of the first vertical axis wind turbine (21), and at least two second vertical axis wind turbines (22) are arranged on the at least two second floating bodies (112) in a one-to-one correspondence; The connecting member (113) is respectively connected to the first floating body (111) and at least two of the second floating bodies (112).

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