Miniature vertical axis wind power generation device

Abstract

The utility model discloses a miniature vertical axis wind power generation device which comprises a supporting column, a rotating shaft, a generator and at least two blades, the rotating shaft is sleeved on the supporting column, the generator is arranged at the bottom of the rotating shaft, and the two blades which are distributed along the rotating shaft in a central symmetry mode are arranged on the side face of the rotating shaft. Strip-shaped air passing holes extending up and down are formed in the root parts, connected with the rotating shaft, of the two blades; and the blade is a petal-shaped curved surface which spirally descends from the top to the bottom and is in an involute state. Open holes are reserved in the roots of the blades, when wind acts on one blade, a part of wind can enter the other blade through gaps in the roots of the blades and interact with the other blade, and the starting wind speed can be further reduced. The blades are arranged to be petal-shaped curved surfaces in an involute state, so that the wind catching area is increased, and the starting wind speed of the miniature vertical axis wind power generation device is further reduced.

Description

Technical Field

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

[0002] Due to its many advantages such as high power generation efficiency, high equivalent hours, and rich available resources, wind power generation has developed rapidly in recent years and has a broad development prospect. At present, in traditional wind power generation, whether onshore or offshore, almost all the types of wind turbines used are horizontal axis turbines. Among them, the starting wind speed of the vertical axis wind turbine is relatively low, and the Savonius drag type wind power generation device can even operate normally at a wind speed of 1 m / s and maintain a certain power generation efficiency. Therefore, the vertical axis wind turbine can be applied in low wind speed areas, with a wide range of application scopes and scenarios, such as building roofs, both sides of landscape roads, parks, etc. However, the currently developed and applied vertical axis wind power generation devices have a low starting efficiency, resulting in the inability to start the fan at low wind speeds, poor wind energy utilization rate, low power generation hours, and high development costs, which have hindered their popularization and have not yet formed a batch and large-scale application for the time being. Content of the Utility Model

[0003] Aiming at the defects existing in the above-mentioned prior art, the technical problem to be solved by the utility model is to provide a micro vertical axis wind power generation device with a low starting wind speed, a large wind-catching area, thereby improving the wind energy utilization rate, and rich applicable scenarios.

[0004] To solve the above technical problems, the utility model adopts the following technical scheme: A micro vertical axis wind power generation device, including a support column, a rotating shaft, a generator, and at least two blades. The rotating shaft is sleeved on the support column, the generator is arranged at the bottom of the rotating shaft, and two blades are arranged on the side of the rotating shaft in a centrosymmetric distribution along the rotating shaft. Strip-shaped air passing holes extending up and down are provided at the roots where the two blades are connected to the rotating shaft; the shape of the blade is a petal-shaped curved surface that spirally descends from the top to the bottom and is in an involute state.

[0005] Preferably, the support column is installed in a strengthening frame, the strengthening frame is a vertically arranged rectangular frame, the upper and lower ends of the support column are respectively fixedly installed at the middle positions of the upper and lower horizontal frames of the strengthening frame, and the generator and the blades are both located within the strengthening frame.

[0006] Preferably, the upper and lower ends of the blade root are fixedly connected to the rotating shaft, and the middle section of the root is provided with an opening.

[0007] Preferably, the generator is a cylindrical generator composed of a generator rotor, a generator stator, and a generator housing; there are two upper and lower generator rotors, including a rotor N - pole magnet and a rotor S - pole magnet. The motor stator is arranged between the two motor rotors and includes a stator coil, and generates electricity through electromagnetic induction driven by wind power.

[0008] Preferably, the generator rotor is connected to the rotating shaft through a connecting flange arranged at the upper end, and the generator housing is connected to the support column through a connecting flange arranged at the lower end; the connecting flange includes a flange connecting plate and connecting flange stiffening plates evenly distributed circumferentially.

[0009] Preferably, the bottom end of the support column is provided with an installation base, and the installation base includes an installation base connecting plate and installation base stiffening plates evenly distributed circumferentially. The vertical plane of the installation base stiffening plate is fixedly connected to the support column.

[0010] The beneficial effects of the present utility model: By leaving an opening at the root of the blade, when the wind acts on one of the blades, a part of the wind can enter another blade through the gap at the root of the blade and interact with it, which can further reduce the starting wind speed; by setting the blade into a petal - shaped curved surface in an involute state, the wind - catching area is increased, and the starting wind speed of the micro - vertical - axis wind power generation device is further reduced. Description of the Drawings

[0011] Figure 1 is the structural schematic diagram of the present utility model;

[0012] Figure 2 is the connection schematic diagram of the blade and the rotating shaft;

[0013] Figure 3 is Figure 2 the A - A cross - sectional view of

[0014] Figure 4 is the connection schematic diagram of the generator and the rotating shaft;

[0015] Figure 5 is the exploded view of the structure of the generator;

[0016] Figure 6 is the structural schematic diagram of the installation base;

[0017] In the figure: 1 - blade, 1a - strip - shaped air vent, 2 - support column, 3 - rotating shaft, 4 - connecting flange, 4a - flange connecting plate, 4b - connecting flange stiffening plate, 5 - generator, 5a - generator rotor, 5a1 - rotor N - pole magnet, 5a2 - rotor S - pole magnet, 5b - generator stator, 5b1 - stator coil, 5c - generator housing, 6 - installation base, 6a - installation base connecting plate, 6b - installation base stiffening plate, 7 - strengthening frame. Detailed implementation mode

[0018] In order to better understand the improvements made by the present utility model compared with the prior art, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments.

[0019] As Figure 1 As shown in Fig. -6, a micro vertical axis wind power generation device mainly consists of a support column 2, a rotating shaft 3, a generator 5 and at least two blades 1. Preferably, there are two blades 1. The rotating shaft 3 is sleeved on the support column 2, and the generator 5 is arranged at the bottom of the rotating shaft 3.

[0020] On the side of the rotating shaft 3, there are two blades 1 symmetrically distributed around the center of the rotating shaft 3. At the roots where the two blades 1 are connected to the rotating shaft 3, there are strip-shaped air passing holes 1a extending vertically. Preferably, the upper and lower ends of the roots of the blades 1 are fixedly connected to the rotating shaft 3, and the middle section of the root is set as the strip-shaped air passing hole 1a. The material of the blades 1 can be polyurethane, polyethylene, metal or wood. The shape of the blades 1 is a petal-shaped curved surface that spirally descends from the top to the bottom and is in an involute state, which increases the wind-catching area, and the shape is similar to a petal, making it more aesthetically pleasing and better adapted to the surrounding landscape environment. It is especially suitable for places such as urban roads, parks, and building roofs, with higher practicality.

[0021] To ensure the overall structural strength, the support column 2 is installed in the strengthening frame 7. The strengthening frame 7 is a vertically arranged rectangular frame. The upper and lower ends of the support column 2 are respectively fixedly installed at the middle positions of the upper and lower horizontal frames of the strengthening frame 7, and both the generator 5 and the blades 1 are located within the strengthening frame 7. The support column 2 and the strengthening frame 7 are preferably made of the same material, such as steel, polyurethane, polyethylene, etc. At the same time, the bottom end of the support column 2 is provided with an installation base 6. Under the action of the wind, the blades 1 can rotate around the center of the support column 2 together with the rotating shaft 3, and the support column 2 is fixed through the installation base 6. The installation base 6 mainly consists of an installation base connecting plate 6a and installation base stiffening plates 6b evenly distributed in the circumferential direction. The vertical plane of the installation base stiffening plates 6b is fixedly connected to the support column 2.

[0022] The generator 5 is a cylindrical generator composed of a generator rotor 5a, a generator stator 5b, and a generator housing 5c. The generator rotor 5a has upper and lower parts, including a rotor N - pole magnet 5a1 and a rotor S - pole magnet 5a2. The motor stator 5b is arranged between the two motor rotors 5a and includes a stator coil 5b1, and generates electricity through electromagnetic induction driven by wind power. The generator rotor 5a is connected to the rotating shaft 3 through a connecting flange 4 provided at the upper end, and the generator housing 5c is connected to the support column 2 through a connecting flange 4 provided at the lower end. The connecting flange 4 includes a flange connecting plate 4a and circumferentially evenly distributed connecting flange stiffening plates 4b. The flange connecting plate 4a is provided with a number of bolt holes and is connected by bolts.

[0023] The above - mentioned is only the preferred specific implementation mode of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution and the inventive concept of the present utility model, makes equivalent substitutions or changes, and should be covered within the protection scope of the present utility model.

Claims

1. A micro vertical axis wind power generation device, comprising a support column (2), a rotating shaft (3), a generator (5) and at least two blades (1), wherein the rotating shaft (3) is sleeved on the support column (2), and the generator (5) is arranged at the bottom of the rotating shaft (3), characterized in that: Two blades (1) are provided on the side of the rotating shaft (3) and are symmetrically distributed along the center of the rotating shaft (3); the roots of the two blades (1) connected to the rotating shaft (3) are provided with strip-shaped air holes (1a) extending up and down; the shape of the blades (1) is a petal-shaped curved surface that spirals downward from the top to the bottom and is in a gradually opening state.

2. A micro vertical axis wind power generation device according to claim 1, characterized in that: The support column (2) is installed in a reinforcement frame (7), the reinforcement frame (7) is a vertically arranged rectangular frame, the upper and lower ends of the support column (2) are respectively fixedly installed at the middle position of the upper and lower cross frames of the reinforcement frame (7), and the generator (5) and the blade (1) are both located in the reinforcement frame (7).

3. A micro vertical axis wind power generation device according to claim 1, characterized in that: The upper and lower ends of the root of the blade (1) are fixedly connected to the rotating shaft (3), and the middle section of the root is provided with a strip-shaped air hole (1a).

4. A micro vertical axis wind power generation device according to claim 1, characterized in that: The generator (5) is a cylindrical generator consisting of a generator rotor (5a), a generator stator (5b) and a generator housing (5c); the generator rotor (5a) is provided with two upper and lower parts, including a rotor N-pole magnet (5a1) and a rotor S-pole magnet (5a2); the motor stator (5b) is arranged between the two motor rotors (5a), including a stator coil (5b1), and generates electricity by electromagnetic induction driven by wind power.

5. A micro vertical axis wind power generation device according to claim 4, characterized in that: The generator rotor (5a) is connected to the rotating shaft (3) via a connecting flange (4) arranged at the upper end, and the generator housing (5c) is connected to the supporting column (2) via a connecting flange (4) arranged at the lower end; the connecting flange (4) comprises a flange connecting plate (4a) and connecting flange stiffening plates (4b) uniformly distributed in the circumferential direction.

6. A micro vertical axis wind power generation device according to claim 1, characterized in that: The bottom end of the support column (2) is provided with a mounting base (6), the mounting base (6) comprising a mounting base connecting plate (6a) and a mounting base stiffening plate (6b) evenly distributed in the circumferential direction, the vertical surface of the mounting base stiffening plate (6b) being fixedly connected to the support column (2).

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