Vertical axis wind turbine

Abstract

The utility model discloses a vertical axis wind turbine, which relates to the technical field of wind power generation, and comprises a plurality of flow guide covers and a rotating shaft, the plurality of flow guide covers are distributed at intervals along the vertical direction, the flow guide covers are annular, and the middle parts of the flow guide covers are bent upwards to form flow guide curved surfaces; the rotating shaft is arranged along the axis of the flow guide cover, spiral fan blades are fixedly connected to the outer side of the rotating shaft, and the rotating shaft is in transmission connection with the first power generator. The vertical-axis wind driven generator can generate power at a low wind speed, and the power generation efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of wind power generation technology, specifically a vertical axis wind turbine. Background Technology

[0002] Wind power, as a clean and renewable energy source, has received increasing attention and application. Currently, wind power technology is mainly divided into two categories: horizontal-axis wind turbines and vertical-axis wind turbines. Horizontal-axis wind turbines are relatively mature technology with high energy conversion efficiency and are widely used. However, their operation is greatly affected by wind direction, requiring a yaw system to adjust the blade angle of attack to maintain optimal energy capture. Furthermore, horizontal-axis wind turbines require a relatively high minimum wind speed to start, making them difficult to start under low wind conditions, thus limiting their application in areas with limited wind resources or weak winds.

[0003] In contrast, vertical axis wind turbines have a simple structure, are independent of wind direction, and can operate stably in multi-wind environments, making them ideal for inland urban areas and environments with weak or unstable wind resources. Their design better copes with changes in wind direction, eliminating the need for complex yaw adjustment systems. However, due to the limited size of the windward vane and limitations imposed by wind flow and air volume, their airflow capture capability and energy conversion efficiency are relatively low.

[0004] Therefore, it is necessary to propose a vertical axis wind turbine to solve the above problems. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] The purpose of this invention is to provide a vertical axis wind turbine to solve the problems mentioned in the background art.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model provides the following technical solution: a vertical axis wind turbine generator, comprising:

[0009] A flow guide cover, wherein there are multiple flow guide covers, which are distributed at intervals along the vertical direction, the flow guide cover is annular, and the middle part of the flow guide cover is bent upward to form a flow guiding surface;

[0010] A rotating shaft is arranged along the axis of the fairing, and a spiral fan blade is fixedly connected to the outer side of the rotating shaft. The rotating shaft is connected to the first generator in a transmission connection.

[0011] Preferably, a flow collector is fitted on the outer side of the top of the spiral fan blade, and the diameter of the flow collector is adapted to the outer diameter of the flow guide.

[0012] Preferably, an auxiliary fan blade is rotatably connected inside the collector shroud, the axis of the auxiliary fan blade is collinear with the axis of the rotating shaft, and the auxiliary fan blade is drivenly connected to the second generator.

[0013] The auxiliary fan blades are fitted with a flow collector cover on the outside, and the diameter of the flow collector cover is adapted to the outer diameter of the flow guide cover.

[0014] Preferably, the plurality of the air deflectors are fixedly connected by support columns, and there are multiple support columns distributed in an array along the circumference of the air deflectors.

[0015] Preferably, the inner diameter of the plurality of flow deflectors gradually decreases from top to bottom.

[0016] Preferably, multiple flow deflectors are fixedly connected by flow deflector plates, and there are multiple flow deflector plates distributed in an array along the circumference of the flow deflectors.

[0017] Preferably, the guide plate is arranged at an angle, and the angle of the guide plate is consistent with the rotation direction of the spiral fan blade.

[0018] Preferably, the rotating shaft is rotatably connected to the fairing via a first bracket, and the first generator is fixedly connected to the fairing via a second bracket.

[0019] Preferably, the width of the spiral fan blades gradually decreases from top to bottom.

[0020] (III) Beneficial Effects

[0021] Compared with the prior art, the present invention provides a vertical axis wind turbine generator with the following advantages:

[0022] 1. This vertical axis wind turbine uses multiple shrouds to converge airflow to increase its velocity, enabling it to generate electricity at lower wind speeds.

[0023] 2. This vertical axis wind turbine improves power generation efficiency by using auxiliary fan blades and spiral fan blades to make multi-stage use of the collected airflow.

[0024] 3. This vertical axis wind turbine uses guide vanes to guide the airflow and avoids airflow bypass, thereby improving its guiding effect. At the same time, by tilting the guide vanes, the negative torque of the airflow on the return blades is reduced, thereby improving the power generation efficiency. Attached Figure Description

[0025] Figure 1 This is a perspective view of one embodiment of the present utility model;

[0026] Figure 2 This is a perspective view of another embodiment of the present utility model;

[0027] Figure 3 This is a cross-sectional schematic diagram of the structure of this utility model;

[0028] Figure 4 This is a top sectional view of the structure of this utility model.

[0029] In the diagram: 1. Auxiliary fan blade; 2. Collector shroud; 3. Flow guide shroud; 4. Flow guide plate; 5. Spiral fan blade; 6. First support; 7. Rotating shaft; 8. First generator; 9. Second support; 10. Second generator. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0031] Please see Figure 1-4 As shown, a vertical axis wind turbine includes a shroud 3 and a rotating shaft 7. Multiple shrouds 3 are distributed at intervals along the vertical direction, and are annular in shape. The center of each shroud 3 is curved upwards to form a guiding surface. The rotating shaft 7 is arranged along the axis of the shroud 3, and a spiral fan blade 5 is fixedly connected to its outer side. The rotating shaft 7 is drively connected to a first generator 8. Specifically, the rotating shaft 7 is rotatably connected to the shroud 3 via a first bracket 6, and the first generator 8 is fixedly connected to the shroud 3 via a second bracket 9.

[0032] In operation, the air deflector 3 guides the airflow upwards through its streamlined guide surface. Multiple air deflectors 3 work together to converge the airflow and increase its velocity. As the airflow passes over the spiral fan blades 5, it drives the rotating shaft 7 to rotate, which in turn drives the first generator 8 to generate electricity. By converging the airflow and increasing its velocity through the air deflector 3, it is possible to generate electricity even at lower wind speeds. Simultaneously, the spiral blade design optimizes the airflow distribution on the blade surface, improves wind energy capture efficiency, and reduces noise during rotation.

[0033] Specifically, a flow collector shroud 2 is fitted onto the outer side of the top of the spiral fan blade 5, and the diameter of the flow collector shroud 2 is adapted to the outer diameter of the flow guide shroud 3. By setting the flow collector shroud 2, the airflow is collected and guided, avoiding airflow diffusion and affecting the flow velocity.

[0034] Please see Figure 1 As shown, in some embodiments, an auxiliary fan blade 1 is rotatably connected inside the collector shroud 2. The axis of the auxiliary fan blade 1 is collinear with the axis of the rotating shaft 7, and the auxiliary fan blade 1 is driven by the second generator 10. By setting the auxiliary fan blade 1 and the spiral fan blade 5, the collected airflow is utilized in multiple stages, thereby improving the energy conversion rate and power generation efficiency.

[0035] Please see Figure 2 and 3 As shown, in some embodiments, the inner diameter of multiple air deflectors 3 gradually decreases from top to bottom. By setting air deflectors 3 with different inner diameters, the air resistance of the upper air deflector 3 on the airflow guided by the current air deflector 3 is reduced, thereby reducing energy loss.

[0036] Specifically, multiple guide shields 3 are fixedly connected by guide plates 4. There are multiple guide plates 4, which are arranged in an array around the circumference of the guide shields 3. Preferably, there are five guide plates 4. When multiple guide shields 3 with different inner diameters are used, the lower guide shield 3, with its smaller inner diameter, is prone to circumferential flow from its side, affecting the guiding effect. By setting guide plates 4 to limit the flow on both sides of the guide shield 3, circumferential flow is avoided, thereby improving its guiding effect.

[0037] Please see Figure 4 As shown, in some embodiments, the guide vane 4 is arranged at an angle, and the angle of the guide vane 4 is consistent with the rotation direction of the propeller blade 5. By guiding the airflow through the guide vane 4, the air is concentrated on the windward side of the impeller, reducing the negative torque of the returning blades and thus improving efficiency.

[0038] Specifically, the width of the spiral fan blade 5 gradually decreases from top to bottom to adapt it to the guide vanes 3 with different inner diameters, thereby obtaining a larger air-receiving area.

[0039] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A vertical axis wind turbine generator, characterized in that, include: A flow guide (3) is provided. There are multiple flow guides (3), which are distributed at intervals along the vertical direction. The flow guides (3) are annular, and the middle part of the flow guides (3) is bent upward to form a flow guiding surface. A rotating shaft (7) is arranged along the axis of the guide shield (3). A spiral fan blade (5) is fixedly connected to the outside of the rotating shaft (7). The rotating shaft (7) is connected to the first generator (8) in a transmission connection.

2. A vertical axis wind turbine generator according to claim 1, characterized in that: The top outer side of the spiral fan blade (5) is fitted with a flow collector (2), the diameter of which is adapted to the outer diameter of the flow guide (3).

3. A vertical axis wind turbine generator according to claim 2, characterized in that: An auxiliary fan blade (1) is rotatably connected inside the collector shroud (2). The axis of the auxiliary fan blade (1) is collinear with the axis of the rotating shaft (7). The auxiliary fan blade (1) is connected to the second generator (10) in a transmission connection.

4. A vertical axis wind turbine generator according to claim 1, characterized in that: The inner diameter of the multiple flow deflectors (3) gradually decreases from top to bottom.

5. A vertical axis wind turbine generator according to claim 1, characterized in that: Multiple flow deflectors (3) are fixedly connected by flow deflector plates (4), and there are multiple flow deflector plates (4) arranged in a circumferential array along the flow deflector (3).

6. A vertical axis wind turbine generator according to claim 5, characterized in that: The guide plate (4) is arranged at an angle, and the angle of the guide plate (4) is consistent with the rotation direction of the spiral fan blade (5).

7. A vertical axis wind turbine generator according to claim 1, characterized in that: The rotating shaft (7) is rotatably connected to the fairing (3) via the first bracket (6), and the first generator (8) is fixedly connected to the fairing (3) via the second bracket (9).

8. A vertical axis wind turbine generator according to claim 1, characterized in that: The width of the spiral fan blade (5) gradually decreases from top to bottom.

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