A blade for vertical axis micro wind power generation

Abstract

This utility model relates to the field of micro-wind power generation equipment technology. The blade for vertical axis micro-wind power generation includes a first blade and a second blade, which are integrally formed hollow structures. The length direction of the first and second blades is arranged along the vertical direction. A positioning protrusion or positioning groove is provided on the right side of the first blade, and a positioning groove or positioning protrusion is provided on the left side of the second blade. The positioning protrusion and positioning groove are interlocked. The blade of this utility model, through the design of different curvature parameters on the side of the blade, has a unique structure and features high strength and light weight, making it more conducive to capturing light winds and starting in light wind environments. Its application helps improve wind power generation efficiency, and the separate blade design also facilitates manufacturing.

Description

Technical Field

[0001] This utility model relates to the field of micro-wind power generation equipment technology, specifically to a blade for vertical axis micro-wind power generation. Background Technology

[0002] Micro-wind power generation, also known as novel micro-wind vertical axis wind power generation, is a technology that efficiently converts wind power into electricity in low-wind environments. Its core lies in the vertical axis design, enabling the generator to capture wind power in all weather conditions and from all directions, achieving a 360-degree wind angle. Compared to traditional wind turbines, vertical axis micro-wind generators can generate electricity even at lower wind speeds, are simpler to manufacture and maintain, require less space, and are better integrated with various industries. For example, the method for regenerating H-type vertical axis micro-wind generator blades from waste wind turbine blades, disclosed in patent announcement number CN119502177B, features a curved outer surface of the blade covered with epoxy resin fiberglass skin, and an internal support frame. While using waste wind turbine blades solves some environmental issues related to waste utilization, it is not suitable for newly designed blades with significantly different shapes. The utility model patent CN221879595U discloses a multi-layered wind-inducing blade for micro-wind power generation, which incorporates a supporting frame structure within the outer skin layer. For blades with internally designed support frames, the overall weight is greater and rotational resistance is higher, which is detrimental to the efficiency of micro-wind power generation. Although there are mature lightweight materials such as aluminum alloys, the large blade size makes it difficult to form a single piece. Utility Model Content

[0003] The purpose of this invention is to provide a blade for vertical axis micro wind power generation, which combines high strength and light weight in blade structure.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] The blade for vertical axis micro wind power generation includes a first blade and a second blade. The first blade and the second blade are integrally formed hollow structures. The length of the first blade and the second blade are arranged in the vertical direction. The right side of the first blade is provided with a positioning protrusion or a positioning groove, and the left side of the second blade is provided with a positioning groove or a positioning protrusion. The positioning protrusion and the positioning groove are interlocked.

[0006] Furthermore, the left side of the first piece is a first arc portion, the front side of the first piece is a second arc portion, and the rear side of the first piece is a third arc portion. The radius of the circle containing the third arc portion is greater than the radius of the circle containing the second arc portion, so that the outer contour of the first piece gradually becomes thicker from left to right.

[0007] Furthermore, the inner cavity of the first piece is provided with at least one reinforcing rib extending vertically, and the inner cavity of the second piece is provided with at least one reinforcing rib extending vertically.

[0008] Furthermore, the right side of the second piece is a fourth arc portion, and the front side of the second piece is provided with a transitional connection between a fifth arc portion and a sixth arc portion. The side of the fifth arc portion away from the sixth arc portion is transitionally connected to the fourth arc portion. The rear side of the second piece is an arc-shaped portion, and the radius of the circle containing the sixth arc portion is larger than the radius of the circle containing the fifth arc portion, so that the second piece forms an outwardly convex section at the fifth arc portion and an inwardly concave section at the sixth arc portion.

[0009] Furthermore, the radius of the circle containing the fourth arc portion is smaller than the radius of the circle containing the fifth arc portion, and the fourth arc portion is transitionally connected to the arc portion.

[0010] Furthermore, the first piece has a positioning protrusion on its right side and a retaining plate on the front and rear sides of the positioning protrusion, forming a retaining groove between the retaining plate and the positioning protrusion; the second piece has a positioning groove on its left side, and retaining strips are formed on the front and rear sides of the positioning groove, extending into the retaining groove.

[0011] Furthermore, the card plate and the card strip are riveted together.

[0012] Furthermore, the first and second pieces are aluminum profiles.

[0013] The beneficial effects of this utility model are:

[0014] This utility model discloses a vertical axis blade for micro-wind power generation, comprising a first blade and a second blade. The first blade 1 and the second blade 2 are integrally formed hollow structures. The first and second blades can be made of aluminum profiles, which are characterized by high strength and light weight. While meeting structural strength requirements within a certain size, they reduce the wind resistance caused by their own weight, making it easier to start in light wind conditions. Furthermore, the separate blade design facilitates manufacturing. By designing different curvature parameters on the side of the blade, a unique windward structure is formed, which is more conducive to capturing light winds and improving wind power generation efficiency. Attached Figure Description

[0015] Figure 1 This is a perspective view of the blade for vertical axis micro wind power generation according to this utility model;

[0016] Figure 2 yes Figure 1 A partial view of the upper middle section;

[0017] Figure 3 yes Figure 2 An exploded view of the structure shown;

[0018] Figure 4This is the end face view of the first piece;

[0019] Figure 5 This is the end face view of the second piece.

[0020] 1. First piece; 11. Reinforcing rib; 12. Positioning protrusion; 13. Clamping plate; 14. Clamping groove; 2. Second piece; 21. Positioning groove; 22. Clamping strip; 31. First arc portion; 32. Second arc portion; 33. Third arc portion; 41. Fourth arc portion; 42. Fifth arc portion; 43. Sixth arc portion; 44. Arc-shaped portion. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art are within the protection scope of the present utility model.

[0022] Embodiments of this utility model:

[0023] like Figures 1-5 As shown, the blade for vertical axis micro-wind power generation includes a first blade 1 and a second blade 2. The first blade 1 and the second blade 2 are integrally formed hollow structures. The first blade 1 and the second blade 2 are made of aluminum profiles; if aluminum-magnesium alloy is used, it offers high strength and light weight, reducing wind resistance caused by its own weight while meeting strength requirements within a certain size. Since the blade is arranged parallel to the vertical axis during use, the length direction of the first blade 1 and the second blade 2 is defined as being along the vertical direction. Generally, several blades are connected to the periphery of the vertical axis by horizontal arms, such as four or five blades evenly spaced around the vertical axis. Under the action of wind, the vertical axis rotates, thereby achieving wind power generation. The specific power generation principle is existing technology and will not be elaborated further. This utility model mainly provides a blade structure.

[0024] The first blade 1 has a positioning protrusion 12 on its right side, and the second blade 2 has a positioning groove 21 on its left side. The positioning protrusion 12 and the positioning groove 21 are interlocked, using a mortise and tenon structure to solve the problem of the difficulty in manufacturing a single blade as a whole. In other embodiments, the positioning groove 21 can be designed on the right side of the first blade 1, and the positioning protrusion 12 can be designed on the left side of the second blade 2, with the positioning protrusion 12 interlocking with the positioning groove 21. In this embodiment, the positioning protrusion 12 has a trapezoidal cross-section, which is adapted to the positioning groove 21; in other embodiments, a triangular or arc-shaped shape can also be used.

[0025] Figure 4As shown, the left side of the first piece 1 is the first arc portion 31, the front side of the first piece 1 is the second arc portion 32, and the rear side of the first piece 1 is the third arc portion 33. The first arc portion 31 is the left end position, and the radius of the circle containing it is smaller than the radius of the circle containing the second arc portion 32. The radius of the circle containing the third arc portion 33 is larger than the radius of the circle containing the second arc portion 32, so that the outer contour of the first piece 1 gradually becomes thicker from left to right.

[0026] The inner cavity of the first piece 1 is provided with at least one reinforcing rib 11 extending vertically, and the inner cavity of the second piece 2 is provided with at least one reinforcing rib 11 extending vertically. In this embodiment, two reinforcing ribs 11 are designed at corresponding positions.

[0027] Figure 5 As shown, the right side of the second piece 2 is the fourth arc portion 41, and the front side of the second piece 2 is provided with a transitional connection between the fifth arc portion 42 and the sixth arc portion 43. The side of the fifth arc portion 42 away from the sixth arc portion 43 is transitionally connected to the fourth arc portion 41. The rear side of the second piece 2 is the arc portion 44. The radius of the circle where the fourth arc portion 41 is located is smaller than the radius of the circle where the fifth arc portion 42 is located. The fourth arc portion 41 and the arc portion 44 are transitionally connected.

[0028] The radius of the circle containing the sixth arc 43 is larger than the radius of the circle containing the fifth arc 42, causing the second blade 2 to form an outwardly convex section at the fifth arc 42 and an inwardly concave section at the sixth arc 43. The design of the first and second blades has been verified through multiple theoretical experiments, which can better utilize wind power and improve power generation efficiency.

[0029] Figure 3 and 4 As shown, on the right side of the first blade 1, there are retaining plates 13 on both the front and rear sides of the positioning protrusion 12. The retaining plates 13 extend in the vertical direction, forming a retaining groove 14 between the retaining plates 13 and the positioning protrusion 12. On the left side of the second blade 2, there are retaining strips 22 on both the front and rear sides of the positioning groove 21. The retaining strips 22 extend into the retaining groove 14. After being engaged, the front and rear sides of the blade are also transitionally connected at the engagement position, forming an arc-shaped structure. The retaining plates 13 and retaining strips 22 are riveted together. After the first blade 1 and the second blade 2 are engaged, multiple rivets are used sequentially in the vertical direction to achieve riveting, forming a blade structure.

[0030] The two ends of the first piece 1 and the second piece 2 are connected, and an aluminum alloy end cap can be riveted to each end to close the end.

[0031] The serial numbers assigned to components in this document, such as "first" and "second," are used solely to distinguish the described objects and have no sequential or technical meaning. The terms "connection" and "linkage" used in this application, unless otherwise specified, include both direct and indirect connections (linkages). In the description of this utility model, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are used only for the convenience of describing the utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the utility model.

[0032] In utility models, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

Claims

1. A blade for vertical axis wind power generation, characterized by: It includes a first piece and a second piece, which are integrally formed hollow structures. The length of the first piece and the second piece are arranged along the vertical direction. The right side of the first piece is provided with a positioning protrusion or a positioning groove, and the left side of the second piece is provided with a positioning groove or a positioning protrusion. The positioning protrusion and the positioning groove are interlocked.

2. The vertical axis wind turbine blade according to claim 1, characterized by: The left side of the first piece is the first arc portion, the front side of the first piece is the second arc portion, and the rear side of the first piece is the third arc portion. The radius of the circle containing the third arc portion is greater than the radius of the circle containing the second arc portion, so that the outer contour of the first piece gradually becomes thicker from left to right.

3. The blade for vertical axis micro-wind power generation according to claim 2, characterized in that: The first piece has at least one reinforcing rib extending vertically in its inner cavity, and the second piece has at least one reinforcing rib extending vertically in its inner cavity.

4. The blade for vertical axis micro-wind power generation according to claim 1, characterized in that: The right side of the second piece is the fourth arc portion. The front side of the second piece is provided with a transitional connection between the fifth arc portion and the sixth arc portion. The side of the fifth arc portion away from the sixth arc portion is transitionally connected to the fourth arc portion. The rear side of the second piece is an arc-shaped portion. The radius of the circle containing the sixth arc portion is larger than the radius of the circle containing the fifth arc portion, so that the second piece forms an outward convex section at the fifth arc portion and an inward concave section at the sixth arc portion.

5. The blade for vertical axis micro-wind power generation according to claim 4, characterized in that: The radius of the circle containing the fourth arc portion is smaller than the radius of the circle containing the fifth arc portion, and the fourth arc portion is connected to the arc portion.

6. The blade for vertical axis micro-wind power generation according to claim 1, characterized in that: The first piece has a positioning protrusion on its right side and a retaining plate on the front and back sides of the positioning protrusion, forming a retaining groove between the retaining plate and the positioning protrusion; the second piece has a positioning groove on its left side, and retaining strips are formed on the front and back sides of the positioning groove, extending into the retaining groove.

7. The blade for vertical axis micro-wind power generation according to claim 6, characterized in that: The card plate and the card strip are riveted together.

8. The blade for vertical axis micro-wind power generation according to any one of claims 1 to 7, characterized in that: The first and second pieces are aluminum profiles.

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