Umbrella-shaped flow guide device applied to horizontal shaft wind turbine generator

Abstract

The invention discloses an umbrella-shaped flow guide device applied to a horizontal shaft wind turbine generator, and relates to the field of new energy wind power generation. The flow guiding device comprises an upper clamping ring and a lower clamping ring, and the upper clamping ring and the lower clamping ring are connected through a plurality of plumb bob lacing wires. An outer supporting ring is arranged outside the lower clamping ring, and a plurality of spokes arranged in a radial shape are arranged between the lower clamping ring and the outer supporting ring. And a fan-shaped curved flow guide plate is arranged between the upper clamping ring and the outer supporting ring. The flow guiding device has the advantages of being simple in structure, convenient to install, good in flow guiding effect, capable of saving land, low in cost and the like.

Description

Technical Field

[0001] The present invention relates to the field of new energy wind power generation, and in particular to an umbrella-shaped flow guide device for an assembled wind turbine set. Background Art

[0002] As a clean and renewable energy source, wind energy has many advantages such as cleanliness, high efficiency, and low carbon. Wind power generation is one of the important pillars of the existing new energy industry. The design of existing wind turbines is relatively mature. How to increase the production and efficiency of wind turbines without changing the structure of existing wind turbines is an important means to improve the utilization rate of wind energy and increase the output value of wind power. With the continuous development of technology, the existing wind power diversion structure generally has the disadvantages of large footprint and poor diversion effect, which cannot capture wind energy to the greatest extent and improve the wind energy utilization coefficient of wind turbines. Summary of the invention

[0003] In order to solve the above technical problems, the present invention provides an umbrella-shaped flow guide device applied to a horizontal axis wind turbine.

[0004] The present invention is achieved by adopting the following technical solutions.

[0005] An umbrella-shaped flow guide device used in a horizontal axis wind turbine generator system comprises an upper clamping ring and a lower clamping ring, wherein the upper clamping ring and the lower clamping ring are connected by a plurality of plumb bob tie rods; an outer support ring is arranged outside the lower clamping ring, and a plurality of spokes arranged radially are arranged between the lower clamping ring and the outer support ring; and a fan-shaped curved flow guide plate is arranged between the upper clamping ring and the outer support ring.

[0006] Furthermore, the upper end of the curved guide plate is bent to form a connecting plate, and the connecting plate is connected to the upper clamping ring.

[0007] Furthermore, a notch is formed on the upper clamping ring, and connecting ears are formed on the ring body on both sides of the notch, and adjusting nuts are passed through the connecting ears.

[0008] Furthermore, the lower clamping ring is provided with a plurality of locking screws along the circumference, and the locking screws and the plumb bob tie rods are arranged alternately.

[0009] Furthermore, an array of holes is formed on the surface of the curved guide plate.

[0010] This application has the following beneficial effects.

[0011] The present invention has innovatively designed the shape and installation position of the wind turbine guide plate, and the guide plate originally installed on the ground is installed on the surface of the wind turbine tower, saving land; the shape of the guide plate is designed to be a curved fan, which greatly increases the incoming wind speed and enhances the guide effect; it is easy to manufacture and transport, and the designed guide structure is simple and effective, and easy to manufacture. Compared with traditional technology, it saves the cost of using expensive steel and reduces its transportation cost; it is easy to install, disassemble and maintain, and the assembly link of the device is simply designed, without the need for a foundation, and the installation and disassembly work is easier than that of traditional guide plates. At the same time, the present device has the effect of periodic maintenance-free. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of the present invention;

[0013] Figure 2 It is a schematic diagram of the structure of the adjusting nut of the present invention;

[0014] Figure 3 It is a schematic diagram of the structure of the fastening screw of the present invention;

[0015] Figure 4 It is the installation schematic diagram of the present invention;

[0016] Figure 5 The diagram is intended to illustrate the vertical spacing between the lower blade tip and the guide plate of the wind turbine of the present invention.

[0017] Among them, 1. upper retaining ring; 2. outer support ring; 3. spokes; 4. lower retaining ring; 5. plumb bob tie rod; 6. curved guide plate; 61. connecting plate; 7. adjusting nut; 8. locking screw; 9. array hole; 10. wind turbine tower. DETAILED DESCRIPTION

[0018] The present patent application is further described below in conjunction with embodiments.

[0019] like Figure 1-5 As shown, the wind turbine guide device of the present invention is umbrella-shaped as a whole, with the wind turbine tower 10 as the umbrella axis, expanding outward from high to low to form a trumpet structure, thereby increasing the wind speed at the lower blade tip of the wind turbine and the inflow wind speed of the wind turbine.

[0020] Specifically, an umbrella-shaped flow guide device applied to a horizontal axis wind turbine generator system includes a fan-shaped curved flow guide plate 6 and upper and lower support frames.

[0021] The upper support frame includes an upper clamp ring 1, and the lower support frame includes a lower clamp ring 4, an outer support ring 2 and spokes 3. The upper clamp ring 1 and the lower clamp ring 4 are used to be fixed to the wind turbine tower 10, and the upper clamp ring 1 and the lower clamp ring 4 are connected by a plurality of plumb tie bars 5. A concentric outer support ring 2 is arranged outside the lower clamp ring 4, and the lower clamp ring 4 and the outer support ring 2 are connected by a plurality of spokes 3 arranged radially, and the spokes 3 can be made of aluminum alloy.

[0022] The fan-shaped curved guide plate 6 of the present application is installed between the upper clamping ring 1 and the outer support ring 2; more specifically, the upper part of the fan-shaped curved guide plate 6 is bent to form a connecting plate 61, the connecting plate 61 is welded to the upper clamping ring 1, and the lower part of the guide plate is welded to the outer support ring 2.

[0023] The upper clamp ring 1 of the present application is formed with an upper notch, and connecting ears are formed on the ring body on both sides of the notch, and an adjusting nut 7 is passed through the connecting ear. The adjusting nut 7 is used to adjust the tightness of the upper clamp ring 1 on the surface of the wind turbine tower 10, so as to bind the entire device to the tower surface and determine the radial position of the upper clamp ring 1 and the entire device.

[0024] The lower retaining ring 4 of the present application is provided with several locking screws 8 arranged along the circumference, and the locking screws 8 are arranged alternately with the plumb bob tie rods 5, and the number of the locking screws 8 is the same as the plumb bob tie rods 5. The locking screws 8 are pointed and are used to fix the lower retaining ring 4 to the surface of the wind turbine tower 10, and determine the radial position and axial position of the lower retaining ring 4 and the entire device.

[0025] The surface of the fan-shaped curved guide plate 6 of the present application is cut with wind-resistant accessory array holes 9 to prevent the huge wind load brought by strong winds in windy weather and protect the safe operation of the guide plate and the wind turbine.

[0026] The size between the upper clamp ring 1 and the lower clamp ring 4 of the present application should match the length of the plumb tie rod 5 and the draft angle of the wind turbine tower 10, that is, the inner diameter of the lower clamp ring 4 should be slightly larger than the inner diameter of the upper clamp ring 1, and the inner diameter difference is calculated as follows:

[0027]

[0028] Where: L is the length of the plumb bob reinforcement;

[0029] —Draft angle of wind turbine tower.

[0030] The diameter of the spokes 3 should be no less than 10 mm, and the number should be no less than 8 and no more than 12.

[0031] The diameter of the plumb bob tie rod 5 should be no less than 6 mm, and the number should be no less than 4 and no more than 8.

[0032] Example

[0033] This embodiment is an umbrella-shaped flow guide device applied to a horizontal axis wind turbine. The structure is integrated into a standard module for easy transportation. When in use, it can be installed on the outer surface of the wind turbine tower 10 by adjusting the nut 7 and the locking screw 8. The flow guide effect of the fan-shaped curved flow guide plate 6 can increase the inflow wind speed of the wind turbine, thereby improving the wind energy utilization coefficient of the wind turbine. According to the installation location of the wind turbine, the annual average wind density, and the wind resistance accessories, the use of this device is as follows:

[0034] ①Axial positioning requirements of guide plate:

[0035] The axial positioning requirement of the guide plate mainly considers the vertical distance l between the lower blade tip and the guide plate when the fan is running (see Figure 5 ), the distance should not be less than 0.05 times the diameter of the wind wheel.

[0036] ②Direction requirements of guide plate:

[0037] The installation direction of the guide plate needs to match the annual average wind density of the wind turbine. The requirement is: the guide plate faces the area with the maximum annual average wind density to ensure that its installation position can maximize the inflow wind speed of the wind turbine.

[0038] ③ Requirements for wind-resistant accessories on the deflector surface:

[0039] The diameter of array hole 9 should not be less than 2.5 cm and not more than 5 cm; the distance between two holes should not be less than 2 times the diameter and not more than 4.5 times the diameter.

[0040] The embodiments of this specific implementation method are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An umbrella-shaped flow guide device applied to a horizontal axis wind turbine, characterized in that: The invention comprises an upper clamping ring (1) and a lower clamping ring (4), wherein the upper clamping ring (1) and the lower clamping ring (4) are connected via a plurality of plumb tie rods (5); an outer support ring (2) is arranged outside the lower clamping ring (4), and a plurality of spokes (3) arranged radially are arranged between the lower clamping ring (4) and the outer support ring (2); and a fan-shaped curved guide plate (6) is arranged between the upper clamping ring (1) and the outer support ring (2).

2. The umbrella-shaped flow guide device for a horizontal axis wind turbine according to claim 1, characterized in that: The upper end of the curved guide plate (6) is bent to form a connecting plate (61), and the connecting plate (61) is connected to the upper clamping ring (1).

3. The umbrella-shaped flow guide device for a horizontal axis wind turbine according to claim 1, characterized in that: The upper clamping ring (1) is formed with a notch, and connecting ears are formed on the ring body at both sides of the notch, and adjusting nuts (7) are passed through the connecting ears.

4. The umbrella-shaped flow guide device for a horizontal axis wind turbine according to claim 1, characterized in that: The lower clamping ring (4) is provided with a plurality of locking screws (8) along the circumference, and the locking screws (8) and the plumb bob tie rods (5) are arranged alternately.

5. The umbrella-shaped flow guide device for a horizontal axis wind turbine according to claim 1, characterized in that: An array of holes (2) is formed on the surface of the curved guide plate (6).

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