CN213655037U

CN213655037U - H-shaped vertical axis wind turbine with streamline groove

Info

Publication number: CN213655037U
Application number: CN202022793476.9U
Authority: CN
Inventors: 陈永艳; 郭欣; 高志鹰
Original assignee: Inner Mongolia University of Technology
Current assignee: Inner Mongolia University of Technology
Priority date: 2020-11-27
Filing date: 2020-11-27
Publication date: 2021-07-09
Anticipated expiration: 2030-11-27

Abstract

The utility model discloses a H type vertical axis wind energy conversion system that has streamlined recess mainly relates to the wind power generation field. Including main shaft, connecting rod and the blade that connects gradually, the blade outside is equipped with a plurality of recesses, the recess sets up along the length of blade. The beneficial effects of the utility model reside in that: the grooves are added on the original blades, so that the starting performance of the wind turbine can be improved, and the output power of the wind turbine, namely the power generation efficiency of the wind turbine, can be improved.

Description

H-shaped vertical axis wind turbine with streamline groove

Technical Field

The utility model relates to a wind power generation field specifically is an H type vertical axis wind energy conversion system that has streamlined recess.

Background

The H-shaped vertical axis wind turbine adopts the aerodynamic principle, aims at the wind tunnel simulation of the rotation of a vertical axis, adopts the airfoil shape of an airplane for blades, and cannot change the efficiency and the like due to deformation when a wind wheel rotates; the wind wheel is composed of 4-5 blades in a vertical straight line, is fixed by a hub in a 4-angle shape or a 5-angle shape, and is connected with a connecting rod of the blades, and the wind wheel drives a rare earth permanent magnet generator to generate electricity and send the electricity to a controller for control, and the electricity used by a load is distributed.

In the prior art, the wing profiles are mainly subjected to large-scale deformation to form a certain resistance shape, or a flow guide device is added to a wind turbine, so that the starting performance is improved by enhancing the wind speed acting on the wind turbine, and with the vigorous development of the wind energy industry, an H-shaped vertical axis wind turbine has the advantage of low noise due to no need of wind alignment.

However, dynamic stall is caused by changes of flow fields around and in the wind wheel of the existing H-shaped vertical axis wind turbine, so that the starting characteristic is quite unsatisfactory, the dynamic stall phenomenon is more obvious at low wind speed and low rotating speed, namely the power coefficient of the existing H-shaped vertical axis wind turbine at low tip speed ratio is quite unsatisfactory, and the starting performance and the output power of the existing H-shaped vertical axis wind turbine are lower.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a H type vertical axis wind energy conversion system that has streamlined recess, it increases a plurality of recesses on original blade, can improve the startability of wind energy conversion system, promotes the output of wind energy conversion system, the generating efficiency of wind energy conversion system promptly.

The utility model discloses a realize above-mentioned purpose, realize through following technical scheme:

the H-shaped vertical axis wind turbine with the streamline grooves comprises a main shaft, a connecting rod and blades which are sequentially connected, wherein a plurality of grooves are formed in the outer sides of the blades, and the grooves are formed along the length of the blades.

Further, the groove comprises a concave part and a convex part, and the cross sections of the concave part and the convex part of the groove are arc-shaped, so that the groove is in a streamline shape.

Contrast prior art, the beneficial effects of the utility model reside in that:

the grooves on the outer sides of the blades can improve the flow field distribution on the surfaces of the blades, weaken flow separation, improve the startability of the wind turbine and enhance the capture capacity of the wind wheel to incoming wind, and after test comparison, the wind turbine with the grooves has better effects on improving the startability of the H-shaped vertical axis wind turbine and improving the output capacity of the whole wind turbine.

Drawings

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

Fig. 2 is a schematic top view of the present invention.

Fig. 3 is a schematic view of the blade structure of the present invention.

Fig. 4 is an enlarged view of a portion a of fig. 2 according to the present invention.

Fig. 5 is a torque coefficient analysis comparison diagram of the present invention.

Reference numerals shown in the drawings:

1. a main shaft; 2. a connecting rod; 3. a blade; 4. a groove; 5. recessing; 6. and (4) protruding.

Detailed Description

The present invention will be further described with reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teachings of the present invention, and these equivalents also fall within the scope defined in the present application.

The utility model relates to a H type vertical axis wind energy conversion system that has streamlined recess, major structure are including main shaft 1, connecting rod 2 and the blade 3 that connects gradually, and blade 3 passes through connecting rod 2 support connection on main shaft 1, the 3 outsides of blade are equipped with a plurality of recesses 4, recess 4 sets up along the length of blade 3, and when the incoming wind blows, the wind energy conversion system blade produces lift and rotates around the main shaft, and recess 4 has been arranged on 3 external surface of blade, and recess 4 can improve the flow field distribution on 3 surfaces of blade, weakens the separation that flows, improves the startability of wind energy conversion system, strengthens the capturing ability of wind wheel to the incoming wind to mention the startability of wind energy conversion system, promote the output of wind energy conversion system.

Preferably, the groove 4 comprises two parts, namely a recess 5 and a protrusion 6, the cross sections of the recess 5 and the protrusion 6 of the groove 4 are both arc-shaped, so that the groove 4 is in a streamline shape, the part is used as an improvement on the original blade, the airflow flows more smoothly, the starting performance of the wind turbine can be further improved, and the output power of the wind turbine, namely the power generation efficiency of the wind turbine, is further improved

Example (b): the H-shaped vertical axis wind turbine with the streamline groove comprises a main shaft 1, a connecting rod 2 and a blade 3 which are sequentially connected, wherein a plurality of grooves 4 are formed in the outer side of the blade 3, the grooves 4 are formed along the length of the blade 3, each groove 4 comprises a recess 5 and a protrusion 6, the cross sections of the recess 5 and the protrusion 6 of each groove 4 are arc-shaped, the depth of each groove is 1mm, the height-to-space ratio of the protrusion 6 to the recess 5 is 5, and the grooves 4 are enabled to be in the streamline shape.

The streamline groove 4 on the outer side of the blade 3 can improve the flow field distribution on the surface of the blade 3, weaken flow separation, improve the startability of the wind turbine and enhance the capture capability of the wind wheel to the incoming wind.

As shown in fig. 5, is tip speed ratio 1: 1, after the wind turbine operates stably, the torque coefficient of the blades of the wind wheel rotating for one circle is analyzed, and the graph shows that the torque coefficient of the wind wheel provided with the streamline grooves 4 is improved at the peak value and the valley value compared with that of the original wind wheel, which shows that the wind turbine provided with the streamline grooves 4 has better effect than that of the original wind wheel, and has better effect on improving the starting performance of the H-shaped vertical wind turbine and the output capacity of the whole wind turbine.

Claims

1. The utility model provides a H type vertical axis wind turbine that has streamlined recess, includes main shaft (1), connecting rod (2) and blade (3) that connect gradually, its characterized in that: the outer side of the blade (3) is provided with a plurality of grooves (4), and the grooves (4) are arranged along the length of the blade (3).

2. The H-shaped vertical axis wind turbine with the streamline groove as set forth in claim 1, wherein: the groove (4) comprises a concave part (5) and a convex part (6), and the sections of the concave part (5) and the convex part (6) of the groove (4) are both arc-shaped, so that the groove (4) is in a streamline shape.