CN210509467U

CN210509467U - Low-air-volume driving blade of wind driven generator

Info

Publication number: CN210509467U
Application number: CN201921678289.7U
Authority: CN
Inventors: 龙燕君
Original assignee: Guangzhou Sailai Network Technology Co ltd
Current assignee: Guangzhou Sailai Network Technology Co ltd
Priority date: 2019-10-09
Filing date: 2019-10-09
Publication date: 2020-05-12
Anticipated expiration: 2029-10-09

Abstract

The utility model discloses a low wind volume driving blade of a wind driven generator, which comprises a blade fixing head, a blade arranged on the blade fixing head, a driving hole arranged on the blade and a wind breaking plate arranged in the driving hole; the number of the blades is three or four; each blade is provided with 8-12 driving holes. The utility model provides a low amount of wind driver blade of aerogenerator for battery charging process, has improved the structure of blade, has improved the utilization ratio of blade to wind-force, fine reduction the demand to wind-force when the blade starts.

Description

Low-air-volume driving blade of wind driven generator

Technical Field

The utility model relates to a aerogenerator blade specifically indicates a low amount of wind drive blade of aerogenerator.

Background

The wind power generator is an electric power device which converts wind energy into mechanical work, and the mechanical work drives a rotor to rotate so as to finally output alternating current. The wind-driven generator generally comprises wind wheels, a generator (including a device), a direction regulator (empennage), a tower, a speed-limiting safety mechanism, an energy storage device and other components. The wind driven generator has simple working principle, the wind wheel rotates under the action of wind force, the kinetic energy of the wind is converted into mechanical energy of a wind wheel shaft, and the generator rotates under the drive of the wind wheel shaft to generate electricity.

The blades in the rotor act to capture the wind and transmit it to the rotor hub. On modern 600 kw wind generators, each rotor blade measures approximately 20 metres in length and is designed much like an airplane wing.

The existing blade structure is a simulated airplane wing, the utilization rate of wind power is low, particularly a large-scale wind driven generator needs larger wind power to drive the blade to rotate when being started, and the wind driven generator is difficult to popularize in places with lower wind power.

How to reduce the requirement of the wind driven generator on starting wind power has become a direction needing important breakthrough in the industry.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome above-mentioned problem, provide a low amount of wind driving blade of aerogenerator, improved the structure of blade, improved the blade to the utilization ratio of wind-force, fine reduction the demand to wind-force when the blade starts.

The purpose of the utility model is realized through the following technical scheme:

a low air volume driving blade of a wind driven generator comprises a blade fixing head, a blade arranged on the blade fixing head, a driving hole arranged on the blade and a wind breaking plate arranged in the driving hole; the number of the blades is three or four; each blade is provided with 8-12 driving holes.

Preferably, the angle between any two adjacent blades is the same.

Preferably, the outlet and the inlet of the driving hole are both semicircular, the channel inside the driving hole is also semicircular, and the distance between any two adjacent driving holes is equal to the radius of the driving hole.

Preferably, the angle between the upper surface of the channel of the driving hole and the inlet plane of the driving hole is 165-170 degrees, and the midline of the lower surface of the channel of the driving hole is arc-shaped, i.e. the driving hole is a through hole with small inlet and outlet areas and large middle area.

Furthermore, the air breaking plate is arranged at the outlet of the driving hole and is attached to the center line of the arc-shaped surface in the driving hole; the air breaking plate is a conical plate with one arc-shaped side, the length of the longest side of the air breaking plate is 10-15CM, the shortest side is arranged on the arc-shaped surface at the outlet of the driving hole, and the length of the shortest side is 1/2 of the radius of the arc-shaped surface at the outlet of the driving hole.

Compared with the prior art, the utility model, following advantage and beneficial effect have:

the utility model has the advantages of simple structure, but the improvement blade that can be fine to the utilization effect of wind-force, greatly reduced the demand of wind-force when the blade starts, improved the application scope of productivity, further improved aerogenerator in the popularization of the lower area of wind-force, promoted the development of trade, improved the competitiveness of enterprise.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a cross-sectional view of the driving hole of the blade of the present invention.

Fig. 3 is a schematic structural diagram of the driving hole of the present invention.

Fig. 4 is a partially enlarged view of fig. 2.

Description of reference numerals: 1. a blade fixing head; 2. a blade; 3. a drive aperture; 4. a wind breaking plate.

Detailed Description

The present invention will be described in further detail with reference to examples, but the present invention is not limited thereto.

Examples

As shown in fig. 1 and 2, a low-air-volume driving blade of a wind driven generator comprises a blade fixing head 1, a blade 2 arranged on the blade fixing head 1, a driving hole 3 arranged on the blade 2, and a wind-breaking plate 4 arranged in the driving hole 3; the number of the blades 2 is three or four; each blade 2 is provided with 8-12 driving holes 3.

Wherein the angle between any two adjacent blades 2 is the same.

The number of the blades is three or four, and the purpose is to reduce the total weight of the blades as much as possible, avoid the increase of the required starting wind force caused by the overhigh total weight of the blades and simultaneously well reduce the interference among the wind exhausted from the driving holes so as to ensure the use effect of the blades.

When the blade is arranged, in order to further reduce the weight of the blade, the inner part of the blade can be hollow, and only the side wall of the driving hole is reserved.

As shown in fig. 2 and 4, the outlet and the inlet of the driving hole 3 are both semicircular, the channel inside the driving hole is also semicircular, and the distance between any two adjacent driving holes 3 is equal to the radius of the driving hole. The angle between the upper surface of the channel of the driving hole 3 and the plane of the inlet of the driving hole 3 is 165-170 degrees, and the center line of the lower surface of the channel of the driving hole 3 is arc-shaped, that is, the driving hole 3 is a through hole with small inlet and outlet areas and large middle area.

Because of the effect of drive hole is for wind provides a passageway, when the blade is rotatory, it will be cut positive wind, the effect of its interior upper surface only makes wind can be quick outflow, and the effect of lower surface is to increase one and can make wind strike, and turn into the rotatory tangential drive power of blade in will strikeing, the intermediate space of whole drive hole is great, make wind-force can be accumulated and compress in the middle part and blow off, the reverse driving force to the blade when further having improved wind-force and blowing off, make the blade can obtain higher drive power in limited wind-force, and then promote the blade and start and rotate the utilization ratio of in-process to wind-force.

The included angle between the upper surface of the driving hole and the plane of the inlet is set to be 165-170 degrees, wind can be well cut, and meanwhile, when the rotating speed of the blades is too high, the normal rotation of the blades is prevented from being influenced by the stress of the upper surface of the driving hole.

Wherein, the thickness of the side wall of the upper surface of the driving hole is 3-5CM, and the thickness of the side wall of the lower surface of the driving hole is 8-12 CM. Since the main force of the driving hole is applied to the lower surface, it is necessary to ensure that the thickness of the sidewall of the lower surface has sufficient hardness to prevent the side surface of the lower surface from being damaged due to excessive stress.

As shown in fig. 2 and 3, the wind breaking plate 4 is arranged at the outlet of the driving hole 3, and the wind breaking plate 4 is attached to the center line of the arc-shaped surface in the driving hole 3; the air breaking plate 4 is a conical plate with one arc-shaped side, the length of the longest side of the air breaking plate is 10-15CM, the shortest side is arranged on the arc-shaped surface at the outlet of the driving hole 3, and the length of the shortest side is 1/2 of the radius of the arc-shaped surface at the outlet of the driving hole 3.

The function of the air breaking plate is to cut and break up the air blown out of the driving hole, and the phenomenon that the normal rotation of the blade is influenced by the vortex formed after the air is blown out of the driving hole is avoided. The specific shape of the wind-breaking plate is designed according to the shape of the fish fin.

When the blade is used, when the blade does not rotate, the wind on the front side blows into the driving hole and directly blows on the lower surface of the driving hole, so that the action area between the wind power and the blade is increased; meanwhile, due to the design that the front part and the rear part of the driving hole are small and the middle part is large, the wind in the driving hole stays in the cavity in the middle of the driving hole for a short time, the volume is reduced by compression when the wind blows out, a large driving force can be provided for the blade, and the utilization effect of the blade on the wind power is greatly improved.

As described above, the utility model discloses alright fine realization.

Claims

1. The utility model provides a aerogenerator low wind volume driving vane which characterized in that: the wind-breaking device comprises a blade fixing head (1), a blade (2) arranged on the blade fixing head (1), a driving hole (3) arranged on the blade (2), and a wind-breaking plate (4) arranged in the driving hole (3); the number of the blades (2) is three or four; each blade (2) is provided with 8-12 driving holes (3).

2. The low air volume driving blade of the wind driven generator as claimed in claim 1, wherein: the angles between any two adjacent blades (2) are the same.

3. The low air volume driving blade of the wind driven generator as claimed in claim 2, wherein: the outlet and the inlet of each driving hole (3) are semicircular, the channel in each driving hole is also semicircular, and the distance between any two adjacent driving holes (3) is equal to the radius of each driving hole.

4. The low-air-volume driving blade of the wind driven generator as claimed in claim 3, wherein: the angle between the upper surface of the channel of the driving hole (3) and the inlet plane of the driving hole (3) is 165-170 degrees, and the center line of the lower surface of the channel of the driving hole (3) is arc-shaped, namely the driving hole (3) is a through hole with small inlet and outlet areas and large middle area.

5. The low air volume driving blade of the wind driven generator as claimed in claim 4, wherein: the air breaking plate (4) is arranged at the outlet of the driving hole (3), and the air breaking plate (4) is attached to the center line of the arc-shaped surface in the driving hole (3); the air breaking plate (4) is a conical plate with one arc-shaped side, the length of the longest side of the air breaking plate is 10-15CM, the shortest side of the air breaking plate is arranged on the arc-shaped surface at the outlet of the driving hole (3), and the length of the shortest side of the air breaking plate is 1/2 of the radius of the arc-shaped surface at the outlet of the driving hole (3).