Fan with wind gathering cover

Abstract

The utility model relates to the technical field of wind power generation, in particular to a fan with a wind gathering cover, which comprises a wind driven generator body and a mounting component. A wind gathering cover shell is arranged on the outer side of an impeller of the wind driven generator body, the wind gathering cover shell comprises a plurality of single shell bodies distributed in an annular array mode, and the size of an inner hole of the wind gathering cover shell is gradually shrunk and then gradually expanded from an air inlet to an air outlet. The mounting assembly comprises two fixing plates symmetrically distributed on the single-piece shells, a plurality of connecting plates which are distributed in an annular array and clamped between the fixing plates of the two single-piece shells, a plurality of first bolts penetrating through the single-piece shells and the connecting plates, and nuts which are in threaded connection with the first bolts and abut against the fixing plates. The resistance coefficient of the wind gathering cover can be reduced, dispersed wind is gathered to form wind in the same direction, wind power is concentrated, and the wind energy utilization rate is increased.

Description

Technical Field

[0001] This utility model relates to the field of wind power generation technology, and in particular to a wind turbine with a wind-concentrating shroud. Background Technology

[0002] A wind turbine is an electrical device that converts wind energy into mechanical work, which drives a rotor to rotate and ultimately outputs alternating current (AC). A wind turbine typically consists of a rotor, generator, directional control unit, tower, speed limiting safety mechanism, and energy storage device. A wind concentrator is a device used to concentrate or guide airflow; it is usually installed at or around the front of the wind turbine to improve the turbine's efficiency or performance in specific applications.

[0003] Chinese Patent CN210343579U discloses a wind turbine generator with a wind collection device, including a wind turbine generator set. Blades are rotatably connected to the left side of the wind turbine generator set, and a wind collection device is provided around the periphery of the blades. The wind collection device is adjacent to the blades and includes a wind collection shroud and a mounting bracket, with the shroud and mounting bracket engaging. This device effectively increases the rotational efficiency of the blades by fixing the wind collection device to the outer wall of the wind turbine generator set. The wind collection shroud is divided into upper and lower parts, which, when fitted with inserts, effectively increase the stability of fixing the shroud. It also allows for quick assembly and disassembly of the wind collection device, increasing the working efficiency of the wind turbine generator and the effectiveness of using the wind collection device. Furthermore, this wind collection device is suitable for small wind turbine generators, is simple to operate, and greatly meets the needs of users.

[0004] However, the above technical solution has the following shortcomings: the performance of the wind guide shroud of the device decreases under low wind speed or frequent wind speed changes, the matching degree between the wind concentrator and the wind turbine impeller is insufficient, resulting in a high drag coefficient of the wind concentrator, thereby reducing the wind energy conversion rate. Utility Model Content

[0005] The purpose of this invention is to address the problems existing in the background technology by proposing a fan with a wind-gathering shroud, which can reduce the drag coefficient of the wind-gathering shroud, gather dispersed wind into a co-directional wind, concentrate wind power, and improve wind energy utilization.

[0006] The present invention provides a wind turbine with a wind-concentrating shroud, comprising a wind turbine generator body and an installation assembly. A wind-concentrating shroud shell is provided on the outer side of the impeller of the wind turbine generator body. The wind-concentrating shroud shell comprises multiple single-piece shells arranged in a ring array. The size of the inner hole of the wind-concentrating shroud shell gradually contracts and then gradually expands from the air inlet to the air outlet. The installation assembly comprises two fixing plates symmetrically distributed on the single-piece shells, multiple connecting plates arranged in a ring array and engaged between the fixing plates of the two single-piece shells, multiple first bolts penetrating the single-piece shells and the connecting plates, and nuts threaded onto the first bolts and abutting against the fixing plates.

[0007] Preferably, the air inlet annular surface is set as the first annular surface, the annular surface of the smallest part of the inner hole is set as the second annular surface, and the air outlet annular surface is set as the third annular surface.

[0008] Preferably, the angle between the line connecting the vertices of the first and second toroidal surfaces and the horizontal line is set as ∠A, and the angle between the line connecting the vertices of the third and second toroidal surfaces and the horizontal line is set as ∠B, where ∠A = 15-45° and ∠B = 25-60°.

[0009] Preferably, a reinforcing plate is provided on the connecting plate.

[0010] Preferably, the wind turbine body is provided with a connecting cover, the wind concentrator housing is provided with a snap-fit ​​plate, and the connecting cover is provided with a limiting groove for the snap-fit ​​plate to be inserted.

[0011] Preferably, the interior of the connecting cover is provided with multiple annular arrays of mating plates that correspond sequentially to the snap-fit ​​plates. Multiple second bolts are provided through and abutting against the mating plates and snap-fit ​​plates, and nuts are threaded onto the second bolts.

[0012] Preferably, a wind vane is provided on the wind turbine body.

[0013] Compared with the prior art, the present invention has the following beneficial technical effects:

[0014] This utility model, through the structural design of the size and angle of the air inlet and outlet of the wind-concentrating hood shell, has a low resistance coefficient, can gather dispersed wind into a unidirectional wind, concentrate wind force, improve wind energy utilization, increase the airflow density by 1.4-1.5 times, and increase the wind speed by 20% to 50%. At the same time, the set installation components can easily install and disassemble the wind-concentrating hood shell, so as to facilitate the production and transportation of the wind-concentrating hood, and have good practicality. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a top view of the wind-collecting shroud housing of this utility model;

[0017] Figure 3 This is a schematic diagram showing the connection between the wind-collecting shroud housing and the mounting components of this utility model.

[0018] Figure 4 This is a schematic diagram of the connecting cover of this utility model.

[0019] Reference numerals in the attached drawings: 1. Wind turbine body; 2. Wind concentrator housing; 3. Single-piece housing; 4. Fixing plate; 5. Connecting plate; 6. First bolt; 7. Clip-on plate; 8. Reinforcing plate; 9. Connecting cover; 10. Limiting groove; 11. Butt joint plate; 12. Second bolt; 13. Wind vane. Detailed Implementation

[0020] Example 1

[0021] like Figure 1 - Figure 4 As shown, this embodiment proposes a wind turbine with a wind-concentrating shroud, including a wind turbine generator body 1 and an installation assembly; a wind-concentrating shroud shell 2 is provided on the outside of the impeller of the wind turbine generator body 1, the wind-concentrating shroud shell 2 includes multiple single-piece shells 3 distributed in a ring array, the size of the inner hole of the wind-concentrating shroud shell 2 gradually shrinks and then gradually expands from the air inlet to the air outlet, and a wind vane 13 is provided on the wind turbine generator body 1, the wind vane 13 is used to adjust the wind turbine direction to ensure that the impeller always faces the wind to maximize power generation efficiency.

[0022] The mounting assembly includes two fixing plates 4 symmetrically distributed on the single housing 3, multiple connecting plates 5 arranged in a ring array and snapped between the fixing plates 4 of the two single housings 3, multiple first bolts 6 penetrating the single housing 3 and the connecting plates 5, and nuts threadedly connected to the first bolts 6 and abutting against the fixing plates 4. The connecting plates 5 are provided with reinforcing plates 8.

[0023] The air inlet annular surface is set as the first annular surface, the annular surface with the smallest diameter of the inner hole is set as the second annular surface, and the air outlet annular surface is set as the third annular surface. The angle between the line connecting the vertices of the first and second annular surfaces and the horizontal line is set as ∠A, and the angle between the line connecting the vertices of the third and second annular surfaces and the horizontal line is set as ∠B. ∠A = 15-45°, ∠B = 25-60°.

[0024] In this embodiment, the diameter of the first annular surface is 1.2-1.4m, and the diameter of the third annular surface is ≥1.6m. Through the structural design of the size and angle of the air inlet and outlet of the air inlet hood shell 2, the dispersed wind is gathered into a unidirectional wind, which concentrates the wind force, improves the wind energy utilization rate, increases the airflow density by 1.4-1.5 times, increases the wind speed by 20%-50%, and has an automatic wind direction function. It can also reduce airflow turbulence, reduce the adhesion of pollutants such as sand and salt spray on the impeller surface, reduce the blade wear and corrosion rate, and thus improve the stability of the wind turbine impeller operation. Furthermore, the air inlet hood shell 2 can be assembled and spliced ​​by the set installation components for the production and transportation of the equipment. When splicing, first, the fixing plate 4 of the single shell 3 is embedded into the groove formed between the fixed connecting plate 5 and the reinforcing plate 8, and then the first bolt 6 is screwed into the corresponding through hole and the screw-connecting nut is screwed in. The operation is simple and convenient.

[0025] It should be noted that this wind turbine can be configured with various models, including direct drive, asynchronous motor, fixed pitch, and variable pitch models, and operates smoothly with low noise.

[0026] Example 2

[0027] like Figure 1 , Figure 3 and Figure 4 As shown in the figure, the wind turbine with a wind-gathering shroud proposed in this embodiment, compared with the first embodiment, has a connecting cover 9 on the wind turbine body 1, a snap-fit ​​plate 7 on the wind-gathering shroud shell 2, a limiting groove 10 for the snap-fit ​​plate 7 to be embedded in the connecting cover 9, and a plurality of docking plates 11 arranged in a ring array and corresponding to the snap-fit ​​plate 7 in sequence inside the connecting cover 9. A plurality of second bolts 12 are provided through and abutting on the docking plates 11 and the snap-fit ​​plate 7, and nuts are threadedly connected to the second bolts 12.

[0028] In this embodiment, the connecting cover 9 includes a cylindrical part and a frustum part (not shown) fixed on the wind turbine body 1. The frustum part adopts a gradually narrowing open structure to ensure smooth airflow. When the wind-gathering cover shell 2 is fixed on the connecting cover 9, the snap-fit ​​plate 7 is aligned with the limiting groove 10 on the connecting cover 9 and inserted until it abuts against the end of the limiting groove 10. Then, the second bolt 12 passes through the mating plate 11 and the snap-fit ​​plate 7 respectively and the nut is screwed on to complete the fixed installation of the wind-gathering cover shell 2.

[0029] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A fan with a wind-concentrating shroud, characterized in that, include: The wind turbine body (1) has a wind-collecting shroud shell (2) on the outside of its rotor. The wind-collecting shroud shell (2) includes multiple single shells (3) arranged in a ring array. The size of the inner hole of the wind-collecting shroud shell (2) gradually shrinks from the air inlet to the air outlet and then gradually expands. The mounting assembly includes two fixing plates (4) symmetrically distributed on the single housing (3), a plurality of connecting plates (5) arranged in a ring array and snapped between the fixing plates (4) of the two single housings (3), a plurality of first bolts (6) penetrating the single housing (3) and the connecting plates (5), and nuts threaded onto the first bolts (6) and abutting against the fixing plates (4).

2. A fan with a wind-concentrating shroud according to claim 1, characterized in that, The air inlet annular surface is set as the first annular surface, the annular surface of the smallest part of the inner hole is set as the second annular surface, and the air outlet annular surface is set as the third annular surface.

3. A fan with a wind-concentrating shroud according to claim 2, characterized in that, The angle between the line connecting the vertices of the first and second tori and the horizontal line is set as ∠A, and the angle between the line connecting the vertices of the third and second tori and the horizontal line is set as ∠B, where ∠A = 15-45° and ∠B = 25-60°.

4. A fan with a wind-concentrating shroud according to claim 1, characterized in that, A reinforcing plate (8) is provided on the connecting plate (5).

5. A fan with a wind-concentrating shroud according to claim 1, characterized in that, A connecting cover (9) is provided on the wind turbine body (1), a snap-fit ​​plate (7) is provided on the wind collector cover shell (2), and a limiting groove (10) for the snap-fit ​​plate (7) to be embedded is provided on the connecting cover (9).

6. A fan with a wind-concentrating shroud according to claim 5, characterized in that, The connecting cover (9) has multiple annular arrays of mating plates (11) that are sequentially corresponding to the snap-fit ​​plate (7). Multiple second bolts (12) are provided through and abutting on the mating plates (11) and the snap-fit ​​plate (7). Nuts are threaded onto the second bolts (12).

7. A fan with a wind-concentrating shroud according to claim 1, characterized in that, A wind vane (13) is installed on the wind turbine body (1).

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