Downwind-direction flow guiding and wind gathering type wind turbine

Abstract

The utility model provides a downwind flow guide and wind gathering type wind turbine which greatly improves the efficiency of wind power generation. In order to solve the technical problem, the technical scheme adopted by the utility model is as follows: the downwind-direction flow-guiding wind-gathering type wind turbine comprises a wind turbine body, a blade of the wind turbine body comprises a blade root part and a windward chord part, the blade root part and the windward chord part are integrally formed, and the blade root part and the windward chord part are integrally formed. The blade root part is used for being connected with a hub of a wind turbine body, the wind receiving chord part is used for catching wind, the chord length of the wind receiving chord part is gradually reduced from the starting position to the blade tip part, the conical flow guiding device is fixedly arranged on one side of a machine box of the wind turbine body, and the small end of the conical flow guiding device is arranged towards the windward side. The large-end projection of the conical flow guide device completely covers the blade root part, and blades of the wind turbine body are arranged towards the conical flow guide device through variable-pitch windward sides; the wind turbine can be widely applied to the field of wind turbines.

Description

TECHNICAL FIELD

[0001] The utility model relates to a downwind guiding wind gathering type wind turbine belongs to wind turbine technical field. BACKGROUND

[0002] As an environmentally friendly and renewable energy source, wind energy has played an increasingly important role in China's energy system in recent years. However, there is a common industry pain point in the field of wind power generation, which is the waste of wind resources near the hub center area. The root cause of this problem is the low efficiency of wind energy utilization, especially the low efficiency of wind energy conversion at the root of the blade, which directly affects the overall power generation capacity.

[0003] Therefore, the optimization design of wind turbine in energy transfer and recovery is particularly important, which not only helps to improve the efficiency of wind power generation, but also has far-reaching significance for promoting the sustainable development of wind energy industry. SUMMARY

[0004] The utility model overcomes the insufficient of prior art, provides a downwind guiding wind gathering type wind turbine, greatly improves the efficiency of wind power generation.

[0005] In order to solve the above technical problems, the utility model adopts the technical scheme of: a downwind guiding wind gathering type wind turbine, including wind turbine body, the blade of wind turbine body includes blade root part and wind string part, the blade root part and wind string part are integrally formed, the blade root part is used for connecting with the hub of wind turbine body, the wind string part is used for catching wind, and the chord length of the wind string part gradually decreases from the starting position to the blade tip, the conical flow guide device is fixedly arranged on one side of the machine box of wind turbine body, the small end of the conical flow guide device is arranged towards the windward surface, the large end of the conical flow guide device projects and completely covers the blade root part, and the blade of wind turbine body is arranged towards the conical flow guide device through variable pitch windward surface.

[0006] Further, the central axis of the conical flow guide device coincides with the blade rotation center axis of the wind turbine body.

[0007] Further, the conical flow guide device is an integral conical shell or a conical skeleton membrane shell.

[0008] Further, the included angle of the small end of the conical flow guide device is 10°-150°.

[0009] Further, the conical flow guide device is an arc-shaped cone.

[0010] The utility model discloses a cone-shaped flow guide device is arranged on the windward side of the wind receiving chord part of the wind turbine body, and the wind flowing through the surface of the cone-shaped flow guide device is guided and turned to the wind receiving chord part to work, which improves the working wind speed of the wind receiving chord part and greatly improves the efficiency of wind power generation. BRIEF DESCRIPTION OF DRAWINGS

[0011] The utility model will be further explained in connection with the drawings.

[0012] Figure 1 It is the structure schematic diagram of the utility model.

[0013] In the drawing: 1 is wind turbine body, 2 is blade root part, 3 is wind receiving chord part, 4 is cone-shaped flow guide device, 5 is machine case. DETAILED DESCRIPTION

[0014] The utility model will be further explained in connection with the drawings.

[0015] Example one

[0016] As Figure 1 The utility model discloses a downwind flow guide wind gathering type wind turbine, including wind turbine body 1, the blade of wind turbine body 1 includes blade root part 2 and wind receiving chord part 3, the blade root part 2 and wind receiving chord part 3 are integrally formed, the blade root part 2 is used for being connected with the hub of wind turbine body 1, the wind receiving chord part 3 is used for catching wind, and the wind receiving chord part 3 gradually becomes small from starting position to blade tip chord length, the cone-shaped flow guide device 4 is fixedly arranged at the one side of the machine case 5 of wind turbine body 1, the small end of cone-shaped flow guide device 4 is arranged towards the windward face, the big end projection of cone-shaped flow guide device 4 completely covers blade root part 2, the blade of wind turbine body 1 is set up towards cone-shaped flow guide device 4 through variable pitch windward face, the central axis of cone-shaped flow guide device 4 coincides with the blade rotation center axis of wind turbine body 1, the cone-shaped flow guide device 4 is one-piece cone-shaped shell or is cone-shaped framework film-coated shell, and the included angle of the small end of cone-shaped flow guide device 4 is 90 °.

[0017] Example two

[0018] The cone-shaped flow guide device 4 in the embodiment is arc-shaped cone, and the remaining features are same with example one.

[0019] The above embodiment one and embodiment two are directed to the 19.8-meter long wing-shaped blade, in the traditional design, due to the connection of the blade root and the hub, the wind energy utilization coefficient fails to be designed at the optimal position. Ideally, the chord length of the blade should gradually increase from the blade tip to the blade root, however, in order to meet the structural strength requirement, the chord length is forced to decrease, causing the wind energy utilization rate of the blade root area to be significantly reduced. The optimal wind energy utilization coefficient is located at a position of 4500mm from the blade root, and the present embodiment implements the flow guiding measure at a position of about 5000mm from the blade root, so as to optimize the airflow guiding and improve the wind energy utilization efficiency.

[0020] The embodiments of the utility model are described in detail above in combination with the drawings, but the utility model is not limited to the above-mentioned embodiments, and various changes can be made within the knowledge range possessed by the ordinary skilled in the art without departing from the purpose of the utility model.

Claims

1. A downwind wind guiding wind concentrating wind turbine comprising a wind turbine body (1), the blade of the wind turbine body (1) comprising a root portion (2) and a wind string portion (3), the root portion (2) and the wind string portion (3) being integrally formed, the root portion (2) being used to connect with the hub of the wind turbine body (1), the wind string portion (3) being used to catch wind, and the wind string portion (3) gradually decreasing in chord length from the starting position to the tip of the blade, characterized in that, The conical flow guide device (4) is fixed on one side of the casing (5) of the wind turbine body (1), the small end of the conical flow guide device (4) is arranged towards the windward surface, the projection of the large end of the conical flow guide device (4) completely covers the blade root part (2), and the blade of the wind turbine body (1) is arranged towards the conical flow guide device (4) through variable pitch. The conical flow guide device (4) is an integrated conical shell or a conical skeleton film shell.

2. A downwind, guide vane, wind concentrating wind turbine according to claim 1, characterized in that The central axis of the conical flow guide device (4) coincides with the central axis of rotation of the blade of the wind turbine body (1).

3. A downwind, guide vane, wind concentrating wind turbine according to claim 1, characterized in that The included angle of the small end of the conical flow guide device (4) is 10°-150°.

4. A downwind, guide vane, wind concentrating wind turbine according to claim 1, characterized in that The conical flow guide device (4) is an arc-shaped cone.

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