Double-wind-wheel blade wind turbine generator

Abstract

The invention provides a double-wind-wheel blade wind turbine generator. The double-wind-wheel blade wind turbine generator comprises a generator body; the first impeller is rotatably connected with the machine body, and the first impeller comprises a plurality of first blades; the second impeller is rotatably connected with the machine body, the second impeller comprises a plurality of second blades, the first impeller and the second impeller are sequentially arranged in the wind receiving direction of the double-wind-wheel-blade wind turbine generator set, a notch part is formed in the side face of the first blade, and a notch part is formed in the side face of the second blade in the wind receiving direction of the double-wind-wheel-blade wind turbine generator set. And the notch part is aligned with at least part of the second blade. The problem that in the prior art, a double-wind-wheel-blade wind turbine generator is poor in power generation condition is solved.

Description

Technical Field

[0001] The present invention relates to the field of wind power technology, and in particular to a wind turbine generator set with double wind rotor blades. Background Art

[0002] Traditional double-rotor blade wind turbines are generally provided with two front and rear impellers, both of which adopt a complete structural form. Thus, in actual use, most of the wind force acts on the front impeller, causing the wind condition of the rear impeller to be affected, thereby affecting the power generation condition. Summary of the invention

[0003] The main purpose of the present invention is to provide a wind turbine with double wind rotor blades to solve the problem of poor power generation of wind turbine with double wind rotor blades in the prior art.

[0004] In order to achieve the above-mentioned objectives, the present invention provides a double-rotor-blade wind turbine generator set, comprising: a machine body; a first impeller, the first impeller being rotatably connected to the machine body, the first impeller comprising a plurality of first blades; a second impeller, the second impeller being rotatably connected to the machine body, the second impeller comprising a plurality of second blades, the first impeller and the second impeller being arranged in sequence along the wind direction of the double-rotor-blade wind turbine generator set, the side surface of the first blade having a notch portion, and the notch portion being aligned with at least a portion of the second blade along the wind direction of the double-rotor-blade wind turbine generator set.

[0005] Furthermore, the second blade includes a second airfoil portion, and along the wind direction of the double-rotor blade wind turbine generator set, the notch portion is aligned with at least a portion of the second airfoil portion.

[0006] Further, the second airfoil portion covers the entire second blade along the length direction of the second blade.

[0007] Furthermore, the first blade includes a first blade root section and a first blade tip section, which are sequentially connected along the length direction of the first blade, the first blade root section has a notch portion, and the first blade tip section has a first airfoil portion.

[0008] Further, the notch portion covers the entire first blade root segment along the length direction of the first blade root segment.

[0009] Further, the first airfoil portion covers the entire first blade tip segment along the length direction of the first blade tip segment.

[0010] Furthermore, the first blade also includes a first reinforcement portion, which is arranged on the inner wall at the connection between the first blade root segment and the first blade tip segment, a part of the first reinforcement portion is connected to the inner wall of the first blade root segment, and another part of the first reinforcement portion is connected to the inner wall of the first blade tip segment.

[0011] Furthermore, the second blade includes a second blade root segment and a second blade tip segment, the second blade root segment and the second blade tip segment are connected sequentially along the length direction of the second blade, the second blade root segment and the second blade tip segment both have a second airfoil portion, and along the wind direction of the double-rotor blade wind turbine generator set, the notch portion is aligned with the second airfoil portion of the second blade root segment.

[0012] Further, the second airfoil portion of the second blade root segment includes a plurality of sub-segments, and the sub-segments are sequentially connected along the length direction of the second blade root segment.

[0013] Furthermore, the second blade also includes a second reinforcement portion, which is arranged on the inner wall at the connection between the second blade root segment and the second blade tip segment, a part of the second reinforcement portion is connected to the inner wall of the second blade root segment, and another part of the second reinforcement portion is connected to the inner wall of the second blade tip segment.

[0014] By applying the technical solution of the present invention, a notch is provided on the first blade of the first impeller located in front of the wind, and the notch is aligned front and back with a part of the second blade, so that the airflow can act on the second blade through the notch of the first blade, so that the second impeller has a good wind receiving condition, thereby ensuring that both the first impeller and the second impeller can rotate quickly under the action of the airflow, thereby improving the power generation condition of the double-rotor blade wind turbine. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] 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:

[0016] Figure 1 A schematic structural diagram of a first blade of the present invention is shown;

[0017] Figure 2 A schematic structural diagram of the second blade of the present invention is shown.

[0018] The above drawings include the following reference numerals:

[0019] 10. First blade; 11. First blade root section; 111. Notch portion; 12. First blade tip section; 13. First reinforcement portion; 20. Second blade; 21. Second blade root section; 211. Second airfoil portion; 22. Second blade tip section; 23. Second reinforcement portion. DETAILED DESCRIPTION

[0020] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0021] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0022] In the present invention, unless otherwise specified, the directional words used, such as "up, down, top, bottom", usually refer to the directions shown in the drawings, or to the components themselves in the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directional words are not used to limit the present invention.

[0023] In order to solve the problem of poor power generation of a wind turbine with dual wind rotor blades in the prior art, the present invention provides a wind turbine with dual wind rotor blades.

[0024] like Figure 1 and Figure 2 A double-rotor-blade wind turbine shown includes a machine body, a first impeller and a second impeller. The first impeller is rotatably connected to the machine body, and the first impeller includes a plurality of first blades 10; the second impeller is rotatably connected to the machine body, and the second impeller includes a plurality of second blades 20. Along the wind direction of the double-rotor-blade wind turbine, the first impeller and the second impeller are arranged in sequence, and the side surface of the first blade 10 has a notch 111. Along the wind direction of the double-rotor-blade wind turbine, the notch 111 is aligned with at least part of the second blade 20.

[0025] In this embodiment, a notch 111 is provided on the first blade 10 of the first impeller located in front of the wind, and the notch 111 is aligned front and back with a part of the second blade 20, so that the airflow can pass through the notch 111 of the first blade 10 and act on the second blade 20, so that the second impeller has a good wind receiving condition, thereby ensuring that both the first impeller and the second impeller can rotate quickly under the action of the airflow, thereby improving the power generation of the double-rotor blade wind turbine.

[0026] It should be noted that the wind direction mentioned in this embodiment refers to the lateral direction of the wind flow, that is, the blowing direction along the axes of the first impeller and the second impeller, and the axes of the first impeller and the second impeller are arranged to coincide with each other. The first impeller and the second impeller are essentially the front impeller and the rear impeller, respectively. The first impeller rotates first when it is affected by the wind, and the second impeller rotates later when it is affected by the wind.

[0027] In this embodiment, the second blade 20 includes a second airfoil portion 211, and along the wind direction of the double-rotor blade wind turbine, that is, along the axial direction of the two impellers, the notch portion 111 is aligned with at least part of the second airfoil portion 211. In this way, the airflow acts on the second airfoil portion 211 of the second impeller through the notch portion 111, thereby improving the wind receiving condition of the second impeller. The reason why the notch portion 111 and the second airfoil portion 211 are aligned front to back in this embodiment is that the second airfoil portion 211 can better drive the second impeller to rotate when it is exposed to wind. Of course, the notch portion 111 can also be aligned front to back with other parts of the second blade 20.

[0028] Preferably, the second airfoil portion 211 of this embodiment covers the entire second blade 20 along the length direction of the second blade 20. Thus, the second blade 20 has a complete airfoil structure, ensuring that the second blade 20 can fully function.

[0029] like Figure 1 As shown, the first blade 10 of this embodiment adopts a segmented structure, which specifically includes a first blade root segment 11 and a first blade tip segment 12. The first blade root segment 11 and the first blade tip segment 12 are connected in sequence along the length direction of the first blade 10. The first blade root segment 11 has a notch portion 111, and the first blade tip segment 12 has a first airfoil portion. The notch portion 111 is essentially formed by removing the airfoil structure of the first blade root segment 11. In other words, the first blade 10 of this embodiment is formed by the first blade root segment 11 without an airfoil structure and the first blade tip segment 12 with a complete airfoil structure. The first blade tip segment 12 and the first blade root segment 11 can be connected and assembled by gluing or other methods. Among them, the cross section of the first blade root segment 11 without an airfoil structure is set to an elliptical cross section, which is manufactured by a fiber winding process, while the first blade tip segment 12 with a complete airfoil structure is manufactured by vacuum infusion, hand lay-up or integrated molding. In this way, on the one hand, the first blade tip section 12 can better absorb wind energy and ensure that the first blade 10 rotates to generate electricity under the action of wind; on the other hand, the first blade root section 11 has higher strength and can ensure the overall structural strength requirements of the first blade 10. At the same time, the setting of the notch 111 allows the wind to act on the second blade 20, so that the unit has the dual advantages of aerodynamic efficiency and structural strength.

[0030] In this embodiment, the notch 111 covers the entire first blade root section 11 along the length direction of the first blade root section 11. In this way, the size of the notch 111 can be increased as much as possible on the basis of ensuring the structural strength of the first blade 10, thereby ensuring the avoidance of the airflow and achieving the effect on the second blade 20 under the action of more wind. Of course, the specific size of the notch 111 can also be adjusted as needed, and is not limited to the setting method of the entire length of this embodiment.

[0031] In this embodiment, the first airfoil portion covers the entire first blade tip section 12 along the length direction of the first blade tip section 12. In this way, the wind resistance of the first blade 10 can be ensured, thereby ensuring the power generation of the first blade 10, avoiding the setting of the notch portion 111 from having a significant impact on the power generation of the first blade 10, thereby improving the overall power generation of the unit.

[0032] The first blade 10 of this embodiment further includes a first reinforcement part 13, which is arranged on the inner wall of the connection between the first blade root segment 11 and the first blade tip segment 12, a part of the first reinforcement part 13 is connected to the inner wall of the first blade root segment 11, and another part of the first reinforcement part 13 is connected to the inner wall of the first blade tip segment 12. The arrangement of the first reinforcement part 13 can greatly improve the connection strength between the first blade root segment 11 and the first blade tip segment 12, thereby ensuring the overall structural strength of the first blade 10. During bonding, firstly, structural glue is applied to the inner surface of the first blade root segment 11, and the first reinforcement part 13 is inserted into the inner side of the first blade root segment 11, so that the first reinforcement part 13 and the first blade root segment 11 are bonded together, and then structural glue is applied before and after the bonding position of the inner side of the first blade root segment 11 and the first blade tip segment 12, and the prefabricated first reinforcement part 13 is inserted into the first blade tip segment 12 through the first blade root segment 11 to enhance the bonding connection.

[0033] Similar to the structure of the first blade 10, Figure 2 As shown, the second blade 20 of this embodiment includes a second blade root section 21 and a second blade tip section 22, which are connected in sequence along the length direction of the second blade 20, and both the second blade root section 21 and the second blade tip section 22 have a second airfoil 211. Along the wind direction of the double-rotor blade wind turbine, the notch 111 is aligned with the second airfoil 211 of the second blade root section 21. In this way, the wind passing through the notch 111 can act on the second airfoil 211, so that the wind force drives the second blade 20 to rotate.

[0034] In this embodiment, the second airfoil portion 211 of the second blade root segment 21 includes a plurality of sub-segments, and the sub-segments are sequentially connected along the length direction of the second blade root segment 21. The sub-segments and other parts of the second blade root segment 21 except the second airfoil portion 211 can be processed separately or in one piece. At least some of the sub-segments of the second airfoil portion 211 of this embodiment are processed separately from other parts of the second blade 20, and the sub-segments are also processed separately. In this way, during actual assembly, the second blade root segment 21 with some sub-segments can be assembled with the second blade tip segment 22 by gluing, and then during the subsequent overall assembly, the unassembled sub-segments can be glued to complete the airfoil of the trailing edge of the second blade root segment 21. Of course, the specific settings and assembly methods are not limited to the examples given above in this embodiment, and can be adjusted accordingly as needed.

[0035] Similar to the arrangement of the first reinforcement portion 13, the second blade 20 of the present embodiment further includes a second reinforcement portion 23, which is arranged on the inner wall of the connection between the second blade root segment 21 and the second blade tip segment 22, a portion of the second reinforcement portion 23 is connected to the inner wall of the second blade root segment 21, and another portion of the second reinforcement portion 23 is connected to the inner wall of the second blade tip segment 22. The manner in which the second blade root segment 21 and the second blade tip segment 22 are reinforced and connected by the second reinforcement portion 23 is the same as the manner in which the first reinforcement portion 13 of the first blade 10 is connected, and will not be described in detail herein.

[0036] The first impeller of this embodiment is provided with two first blades 10, and the second impeller is provided with three second blades 20, so that the number of first blades 10 of the first impeller is less than the number of second blades 20 of the second impeller. At the same time, this embodiment adopts a method in which the diameter of the first impeller is larger than the diameter of the second impeller. Of course, the specific number of settings, diameter size, etc. can be adjusted as needed, for example, the number of blades and diameter size of the two impellers can be set to be equal.

[0037] It should be noted that, the multiple in the above embodiments refers to at least two.

[0038] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0039] 1. Solve the problem of poor power generation of double-wind-rotor-blade wind turbines in the prior art;

[0040] 2. The second impeller has good wind receiving conditions, thereby ensuring that both the first impeller and the second impeller can rotate quickly under the action of airflow, thereby improving the power generation of the double-wind-blade wind turbine;

[0041] 3. The first blade tip section can absorb wind energy well, ensuring that the first blade rotates to generate electricity under the action of wind. The first blade root section has high strength, which can ensure the overall structural strength requirements of the first blade. The wind can act on the second blade, so that the unit has the dual advantages of aerodynamic efficiency and structural strength.

[0042] Obviously, the above-described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0043] 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.

[0044] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0045] 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 wind turbine with double wind rotor blades, characterized in that: include: Body; a first impeller, the first impeller being rotatably connected to the machine body, the first impeller comprising a plurality of first blades (10); A second impeller, the second impeller is rotatably connected to the body, the second impeller comprises a plurality of second blades (20), the first impeller and the second impeller are arranged in sequence along the wind direction of the double-rotor-blade wind turbine set, the side surface of the first blade (10) has a notch portion (111), and along the wind direction of the double-rotor-blade wind turbine set, the notch portion (111) is aligned with at least a portion of the second blade (20).

2. The double-rotor blade wind turbine generator set according to claim 1, characterized in that: The second blade (20) comprises a second airfoil portion, and along the wind receiving direction of the double-rotor blade wind turbine generator set, the notch portion (111) is arranged in alignment with at least a portion of the second airfoil portion.

3. The double-rotor blade wind turbine generator set according to claim 2, characterized in that: The second airfoil portion covers the entire second blade (20) along the length direction of the second blade (20).

4. The double-rotor blade wind turbine generator set according to claim 1, characterized in that: The first blade (10) comprises a first blade root section (11) and a first blade tip section (12); the first blade root section (11) and the first blade tip section (12) are connected in sequence along the length direction of the first blade (10); the first blade root section (11) has the notch portion (111), and the first blade tip section (12) has a first airfoil portion.

5. The double-rotor blade wind turbine generator set according to claim 4, characterized in that: The notch portion (111) covers the entire first blade root segment (11) along the length direction of the first blade root segment (11).

6. The double-rotor blade wind turbine generator set according to claim 4, characterized in that: The first airfoil portion covers the entire first blade tip section (12) along the length direction of the first blade tip section (12).

7. The double-rotor blade wind turbine generator set according to claim 4, characterized in that: The first blade (10) further comprises a first reinforcement portion (13), wherein the first reinforcement portion (13) is arranged on an inner wall at a connection between the first blade root segment (11) and the first blade tip segment (12), a portion of the first reinforcement portion (13) is connected to the inner wall of the first blade root segment (11), and another portion of the first reinforcement portion (13) is connected to the inner wall of the first blade tip segment (12).

8. The double-rotor blade wind turbine generator set according to claim 1, characterized in that: The second blade (20) comprises a second blade root section (21) and a second blade tip section (22); the second blade root section (21) and the second blade tip section (22) are connected in sequence along the length direction of the second blade (20); the second blade root section (21) and the second blade tip section (22) both have a second airfoil portion (211); along the wind direction of the double-rotor blade wind turbine generator set, the notch portion (111) is aligned with the second airfoil portion (211) of the second blade root section (21).

9. The double-rotor blade wind turbine generator set according to claim 8, characterized in that: The second airfoil portion (211) of the second blade root segment (21) comprises a plurality of sub-segments, and the sub-segments are connected in sequence along the length direction of the second blade root segment (21).

10. The double-rotor blade wind turbine generator set according to claim 8, characterized in that: The second blade (20) further comprises a second reinforcement portion (23), the second reinforcement portion (23) being arranged on an inner wall at a connection between the second blade root segment (21) and the second blade tip segment (22), a portion of the second reinforcement portion (23) being connected to the inner wall of the second blade root segment (21), and another portion of the second reinforcement portion (23) being connected to the inner wall of the second blade tip segment (22).

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