Blade connecting device of vertical axis wind turbine

Abstract

A blade connecting device of a vertical axis wind turbine comprises a plurality of blade bodies and a slotted shaft sleeve. Each blade main body is mainly formed by integrally forming a forming plate and a folded edge; equant grooves are formed in the end face of the slotted shaft sleeve; the head end and the tail end of each blade body are connected in an embedded mode through folded edges and grooves of the paired slotted shaft sleeves, and the blade bodies are concentrically arranged around the slotted shaft sleeves. According to the blade connecting device, the connecting mode that the folded edges of the blades are reinforced and the folded edges and the grooves generate radial self-locking is utilized, so that the blades can form a stable relation through the slotted shaft sleeves at the two ends, meanwhile, the slotted shaft sleeves are conveniently connected with the main shaft, the whole manufacturing is simplified and light, the efficiency is high, and the cost is low.

Description

Technical Field

[0001] The utility model relates to the technical field of wind energy and wind power generation, and in particular to a blade connecting device of a vertical axis wind turbine. Background Art

[0002] Mechanical energy is obtained from the wind, which is called wind energy. The earliest use of wind energy was to use windmills to lift water and make powder. With the development of the times, wind energy has evolved from the simple use of wind energy, such as the wind cap on the roof of a building, to change the airflow exchange inside and outside the building through external wind force. More is converted into electrical energy to form a wind turbine. As a vertical axis wind turbine in a wind turbine, its blades are made of metal materials such as aluminum alloy sheets or ordinary composite materials (especially fiberglass fiber), resin, and various shapes including rotor type, Savonius type, Darrieus type and H straight wing type. For the fixed installation of these blades, the blades and the main shaft are generally connected by support rods and bolts. This connection requires more rods to strengthen the load strength and stability of the blades, and together with many bolts, the overall mass is increased, which increases the starting wind speed, and the installation process is too cumbersome. Summary of the invention

[0003] The utility model aims to provide a blade connection device for a vertical axis wind turbine which utilizes blade folding edges and shaft sleeves as a connection method.

[0004] The utility model proposes a blade connection device for a vertical axis wind turbine, which is characterized by comprising a plurality of blade bodies and a slotted shaft sleeve; the plurality of blade bodies, each of which is mainly formed by integrally forming a formed plate and a folded edge; the end surface of the slotted shaft sleeve is provided with equally divided grooves; the head and tail ends of each blade body are connected by embedding the folded edge and the grooves of the slotted shaft sleeve used in pairs, and the blade bodies are concentrically arranged around the slotted shaft sleeve.

[0005] Preferably, the number of the blade bodies is greater than or equal to 2.

[0006] Preferably, the angle between the folded edge and the main body of the blade body is between 10 and 180 degrees.

[0007] Preferably, the groove of the slotted sleeve is a groove that divides the end surface equally.

[0008] Preferably, there are two slotted sleeves, or at least one is connected to the external main shaft.

[0009] Preferably, the blade body and the slotted sleeve are made of one of aluminum alloy, carbon steel, stainless steel, glass fiber, carbon fiber, nylon and polycarbonate.

[0010] The blade connection device proposed in the utility model utilizes the blade's own folded edge reinforcement, the folded edge and the slotted sleeve groove to produce a radial self-locking connection form, so that each blade can form a stable relationship through the slotted sleeves at both ends, and at the same time the slotted sleeves are conveniently connected to the main shaft, the overall simplification and lightweight, high efficiency and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a three-dimensional schematic diagram of the wind turbine blade connection device of the utility model;

[0012] Figure 2 It is a top view of a middle section of a wind turbine blade connecting device of the utility model.

[0013] In the figure: 1. Blade body; 2. Slotted sleeve. DETAILED DESCRIPTION

[0014] The following is a further detailed description of a blade connection device for a vertical axis wind turbine proposed by the utility model in combination with the accompanying drawings and specific implementation methods. According to the following description, the advantages and features of the utility model will be clearer. It should be noted that the accompanying drawings are in a very simplified form and use non-precise proportions, which are only used to conveniently and clearly assist in explaining the purpose of the implementation method of the utility model. In order to make the purpose, features and advantages of the utility model more obvious and easy to understand, please refer to the accompanying drawings. It should be noted that the structure, proportion, size, etc. illustrated in the drawings of this specification are only used to match the content disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the utility model, so it has no technical substantive significance. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effect that the utility model can produce and the purpose that can be achieved, should still fall within the scope of the technical content disclosed by the utility model.

[0015] like Figure 1 , 2 As shown, the blade connection device of the wind turbine proposed by the utility model includes a plurality of blade bodies 1 and a slotted sleeve 2; among the plurality of blade bodies, each blade body 1 is mainly formed by a molded plate and a folded edge in one piece; the end face of the slotted sleeve 2 is provided with an equally divided groove, and the groove width is equal to the thickness of the blade; the head and tail ends of each blade body 1 are connected by embedding the grooves of the folded edge and the slotted sleeve 2 used in pairs, that is, the grooved side of the slotted sleeve 2 is inserted in a vertical direction toward the folded edge ends of the three blade bodies 1, at this time, the slotted sleeve 2 has three groups of grooves, each group is in an eight-shaped shape so that a single folded edge is restricted in the inner and outer radial directions of the groove, and the three blade bodies 1 are concentrically arranged around the slotted sleeve 2. In order to further strengthen the connection strength of each blade body 1 and the slotted sleeve 2, structural sealant or welding can also be applied inside and outside the folded edge and groove connection.

[0016] As a preferred example, the number of the plurality of blade bodies 1 is more than 2, and in the embodiment, preferably 3 blade bodies 1 .

[0017] Furthermore, the angle between the folded edge and the main body of the blade body 1 is between 10 and 180 degrees, and is preferably 120 degrees in the embodiment.

[0018] Furthermore, there are two slotted sleeves 2, one end surface is provided with equally divided grooves, each group is in an eight-shaped shape, and the number of groups is the same as the number of blade bodies 1. After the slotted sleeves 2 at both ends fix multiple blade bodies 1, they are sleeved on the external vertical wind turbine main shaft and screwed and fastened.

[0019] Furthermore, in order to meet the requirements of both lightweight and strong blade connection, the blade body 1 and the slotted sleeve 2 can be made of aluminum alloy, carbon steel or stainless steel sheet, carbon fiber material, glass fiber material, nylon, and polycarbonate resin.

[0020] The blade connection device provided by the utility model utilizes the blade's own folding edge reinforcement and self-locking to limit sliding, which not only has a simple structure and reduces the overall mass, but also has the following beneficial effects:

[0021] The blade body and the folded edge are integrally formed and made of lightweight materials, which is simple to process and low in cost.

[0022] Although the content of the utility model has been described in detail through the above preferred embodiments, it should be appreciated that the above description should not be considered as a limitation of the utility model. After reading the above content, various modifications and substitutions of the utility model will be obvious to those skilled in the art. Therefore, the protection scope of the utility model should be limited by the attached claims.

Claims

1. A blade connection device for a vertical axis wind turbine, characterized in that: The invention comprises a plurality of blade bodies (1) and a slotted shaft sleeve (2); each of the plurality of blade bodies (1) is mainly formed by integrally forming a molded plate and a folded edge; the end surface of the slotted shaft sleeve (2) is provided with an equally divided groove; the head and tail ends of each blade body (1) are connected by embedding the folded edge and the groove of a pair of slotted shaft sleeves (2), and each blade body (1) is concentrically arranged around the slotted shaft sleeve (2).

2. A blade connection device for a vertical axis wind turbine according to claim 1, characterized in that: The number of the blade bodies (1) is greater than or equal to 2.

3. The blade connection device of a vertical axis wind turbine according to claim 1, characterized in that: The angle between the folded edge and the main body of the blade body (1) is between 10 and 180 degrees.

4. The blade connection device of a vertical axis wind turbine according to claim 1, characterized in that: The grooves of the slotted shaft sleeve (2) are grooves that divide the end surface equally.

5. The blade connection device of a vertical axis wind turbine according to claim 1, characterized in that: There are two slotted shaft sleeves (2), or at least one of them is sleeved with an external main shaft.

6. The blade connection device of a vertical axis wind turbine according to claim 1, characterized in that: The blade body (1) and the slotted shaft sleeve (2) are made of one of aluminum alloy, carbon steel, stainless steel, glass fiber, carbon fiber, nylon, and polycarbonate.

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