Combined streamlined airfoil wind turbine

Abstract

The present invention provides a combined streamlined airfoil wind turbine, comprising a wind wheel hub, a plurality of blade assemblies, a plurality of rotating arms and a wind turbine; the wind wheel hub is connected to the wind turbine via a rotating shaft below; the blade assembly is connected to the periphery of the wind wheel hub via a rotating arm; each of the blade assemblies comprises a plurality of connecting rods and a plurality of blades stacked in a longitudinal direction, the blades are detachably connected to each other via the connecting rods and detachably fixed to the outer end of the rotating arm via the connecting rods; each of the blades comprises a streamlined front wing, a streamlined rear wing and a transition wing connecting the streamlined front wing and the streamlined rear wing. The combined streamlined airfoil wind turbine of the present invention can change the size and height of the blade assembly.

Description

Technical Field

[0001] The invention relates to the technical field of wind power generation equipment, and in particular to a combined streamlined airfoil wind power generator. Background Art

[0002] Vertical axis wind turbines are resistance wind turbines, which rely on the difference between windward resistance and leeward resistance to obtain power. They have the advantages of not requiring wind direction, low noise, safe and reliable operation, beautiful appearance and simple maintenance. In recent years, they have been increasingly used in public lighting in urban center areas, residential households, billboards, building electricity, highway full-range monitoring systems, cruise ships, fishing boats, rural power stations and other fields.

[0003] At present, the size and height of wind turbine blades cannot be changed after leaving the factory. The size and height are fixed and inconvenient to adjust. Summary of the invention

[0004] In view of the above-mentioned deficiencies in the prior art, the present invention provides a combined streamlined airfoil wind turbine, which can change the size and height of the blade assembly.

[0005] In order to achieve the above-mentioned purpose, the present invention provides a combined streamlined airfoil wind turbine, comprising a wind wheel hub, a plurality of blade assemblies, a plurality of rotating arms and a wind turbine; the wind wheel hub is connected to the wind turbine via a rotating shaft below; the blade assembly is connected to the periphery of the wind wheel hub via a rotating arm; each of the blade assemblies comprises a plurality of connecting rods and a plurality of blades stacked in a longitudinal direction, the blades are detachably connected to each other via the connecting rods and are detachably fixed to the outer end of the rotating arm via the connecting rods; each of the blades comprises a streamlined front wing, a streamlined rear wing and a transition wing connecting the streamlined front wing and the streamlined rear wing.

[0006] Preferably, a resistance cutout is provided on the edges of the streamlined front wing facing toward and away from the wind wheel hub, and an arc contraction portion is integrally formed between the streamlined front wing and the transition wing, and the width of the arc contraction portion narrows from the streamlined front wing toward the transition wing.

[0007] Preferably, two resistance notches are provided on the streamlined rear wing, the horizontal cross-section of the resistance notch is J-shaped, and the two resistance notches are respectively connected to the edges of the transition wing facing toward and facing away from the wind wheel hub.

[0008] Preferably, a countersunk through hole is respectively provided at the streamlined front wing and the streamlined rear wing of the blade; the connecting rod is inserted into the countersunk through hole and is threadedly connected with the connecting rod or bolt below.

[0009] Preferably, a threaded hole is provided on the upper surface of the connecting rod, and an external thread matching with the threaded hole is formed on the lower portion of the connecting rod; and the end of the rotating arm away from the wind wheel hub is sleeved and connected to the outside of the connecting rod.

[0010] The present invention adopts the above technical solution, so it has the following beneficial effects:

[0011] 1. The blade assembly of the present invention is assembled in a building block style, and multiple blades can be connected in the longitudinal direction through a connecting rod, so that the height size of the blade assembly is variable, and it can be assembled on site, which is convenient for transportation;

[0012] 2. The streamlined front wing and the transition wing, as well as the transition wing and the streamlined rear wing are smoothly connected through the arc contraction part and the resistance notch. The blade adopts a streamlined design as a whole, with a reasonable structure and good aerodynamic performance. The wind-blocking area of ​​the blade is increased through the resistance cut and the resistance notch, which improves the rotational torque of the blade, helps the blade to start in the low wind speed area, and improves the utilization rate of wind energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of a combined streamlined airfoil wind turbine according to an embodiment of the present invention;

[0014] Figure 2 A top view of a blade according to an embodiment of the present invention;

[0015] Figure 3 A half-section diagram of a blade according to an embodiment of the present invention;

[0016] Figure 4 The figure is a schematic diagram of the connection structure of the wind wheel hub, the connecting rod and the rotating arm according to an embodiment of the present invention. DETAILED DESCRIPTION

[0017] According to the attached figure Figure 1 to Figure 4 , give the preferred embodiments of the present invention, and describe them in detail so that the functions and features of the present invention can be better understood.

[0018] See also Figure 1 to Figure 4 A combined streamlined airfoil wind turbine according to an embodiment of the present invention comprises a wind turbine hub 1, a plurality of blade assemblies 2, a plurality of rotating arms 13 and a wind turbine; the wind turbine hub 1 is connected to the wind turbine via a rotating shaft below; the blade assemblies 2 are connected to the periphery of the wind turbine hub 1 via the rotating arms 13; each blade assembly 2 comprises a plurality of connecting rods 12 and a plurality of blades 3 stacked in a longitudinal direction, the blades 3 are detachably connected to each other via the connecting rods 12 and detachably fixed to the outer ends of the rotating arms 13 via the connecting rods 12; each blade 3 comprises a streamlined front wing 4, a streamlined rear wing 5 and a transition wing 6 connecting the streamlined front wing 4 and the streamlined rear wing 5; a support column is installed at the bottom of the wind turbine via flange bolts.

[0019] In this embodiment, the blade assembly 2 is assembled in a building block style, and multiple blades 3 can be connected in the longitudinal direction through the connecting rod 12, so that the height size of the blade assembly 2 is variable, and it can be assembled on site for easy transportation.

[0020] The streamlined front wing 4 has a resistance cutout 7 on its edge facing toward and away from the wind wheel hub 1. An arc contraction portion 8 is integrally formed between the streamlined front wing 4 and the transition wing 6. The width of the arc contraction portion 8 becomes narrower from the streamlined front wing 4 to the transition wing 6.

[0021] Two resistance notches 9 are provided on the streamlined rear wing 5 . The horizontal cross section of the resistance notch 9 is in a J-shape. The two resistance notches 9 are respectively connected to the edges of the transition wing 6 facing toward and away from the wind wheel hub 1 .

[0022] The present invention smoothly connects the streamlined front wing 4 and the transition wing 6, as well as the transition wing 6 and the streamlined rear wing 5, through the arc contraction portion 8 and the resistance notch 9. The blade 3 as a whole adopts a streamlined design with a reasonable structure and good aerodynamic performance. The resistance notch 7 and the resistance notch 9 increase the wind-blocking area of ​​the blade 3, improve the rotational torque of the blade 3, help the blade 3 start in a low wind speed area, and improve the utilization rate of wind energy.

[0023] A countersunk through hole 10 is respectively formed at the streamlined front wing 4 and the streamlined rear wing 5 of the blade 3; a connecting rod 12 is inserted into the countersunk through hole 10 and is screwed to the lower connecting rod 12 or bolt.

[0024] A threaded hole is formed on the upper surface of the connecting rod 12 , and an external thread matching the threaded hole is formed on the lower portion of the connecting rod 12 ; the end of the rotating arm 13 away from the wind wheel hub 1 is sleeved and connected to the outside of the connecting rod 12 .

[0025] The blades 3 located at the upper and lower sides of the rotating arm 13 are fixed by threads of two connecting rods 12 to jointly clamp the rotating arm 13. The wind wheel hub 1 and the blades 3 form a triangular stable structure through the two rotating arms 13, and the structural strength is high.

[0026] The present invention is described in detail above in conjunction with the embodiments of the accompanying drawings. A person skilled in the art can make various variations of the present invention according to the above description. Therefore, certain details in the embodiments should not constitute a limitation of the present invention, and the scope of protection of the present invention shall be defined by the scope of the attached claims.

Claims

1. A combined streamlined airfoil wind turbine, characterized in that: The invention comprises a wind turbine hub (1), a plurality of blade assemblies (2), a plurality of rotating arms (13) and a wind turbine generator; the wind turbine hub (1) is connected to the wind turbine generator via a rotating shaft at the bottom; the blade assemblies (2) are connected to the periphery of the wind turbine hub (1) via the rotating arms (13); each of the blade assemblies (2) comprises a plurality of connecting rods (12) and a plurality of blades (3) stacked in a longitudinal direction, the blades (3) being detachably connected to each other via the connecting rods (12) and detachably fixed to the outer end of the rotating arms (13) via the connecting rods (12); each of the blades (3) comprises a streamlined front wing (4), a streamlined rear wing (5) and a transition wing (6) connecting the streamlined front wing (4) and the streamlined rear wing (5); The streamlined front wing (4) is provided with a resistance cutout (7) on its edge facing toward and away from the wind wheel hub (1), and a circular arc contraction portion (8) is integrally formed between the streamlined front wing (4) and the transition wing (6), wherein the width of the circular arc contraction portion (8) narrows from the streamlined front wing (4) toward the transition wing (6).

2. The combined streamlined airfoil wind turbine according to claim 1, characterized in that: The streamlined rear wing (5) is provided with two resistance notches (9), the horizontal cross-section of the resistance notch (9) being in a J-shape, and the two resistance notches (9) are respectively connected to the edges of the transition wing (6) facing towards and away from the wind wheel hub (1).

3. The combined streamlined airfoil wind turbine according to claim 2, characterized in that: The streamlined front wing (4) and the streamlined rear wing (5) of the blade (3) are each provided with a countersunk through hole (10); the connecting rod (12) is inserted into the countersunk through hole (10) and is screwed to the connecting rod (12) or bolt below.

4. The combined streamlined airfoil wind turbine according to claim 3, characterized in that: A threaded hole is formed on the upper surface of the connecting rod (12), and an external thread matching the threaded hole is formed on the lower portion of the connecting rod (12); an end of the rotating arm (13) away from the wind wheel hub (1) is sleeved and connected to the outside of the connecting rod (12).

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