CN217813756U - Vertical axis wind turbine for improving wind energy utilization rate - Google Patents

Vertical axis wind turbine for improving wind energy utilization rate Download PDF

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Publication number
CN217813756U
CN217813756U CN202220539639.7U CN202220539639U CN217813756U CN 217813756 U CN217813756 U CN 217813756U CN 202220539639 U CN202220539639 U CN 202220539639U CN 217813756 U CN217813756 U CN 217813756U
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China
Prior art keywords
blade
groove
rear end
wind energy
rotating shaft
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CN202220539639.7U
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Chinese (zh)
Inventor
许安成
任永吉
陶芳燕
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Luoyang Nameng New Energy Prime Mover Equipment Manufacturing Co ltd
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Luoyang Nameng New Energy Prime Mover Equipment Manufacturing Co ltd
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Priority to CN202220539639.7U priority Critical patent/CN217813756U/en
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/74—Wind turbines with rotation axis perpendicular to the wind direction

Abstract

The utility model relates to a wind power generation technical field, concretely relates to improve wind energy utilization's vertical axis wind energy conversion system. The device comprises a rotating shaft, blades, an adjusting structure and a connecting rod, wherein the blades are connected with the rotating shaft through the connecting rod, and the adjusting structure comprises an air inlet groove, an air exhaust groove, a low-pressure groove and an injection pipe. Partial airflow enters the blade through the air inlet groove when the airflow passes through the front end of the blade, after the airflow is accelerated through the air inlet groove, the airflow forms high-speed low-pressure airflow in the exhaust groove, the airflow on the surface of the rear end of the blade can be sucked into the low-pressure groove, the airflow flows through the injection pipe and then is merged into the exhaust groove, the merged air is sprayed out from the rear end of the blade, on one hand, the air pressure at the front end of the blade is reduced, the appearance resistance of the blade is reduced, on the other hand, the separation of a boundary layer of a suction surface of the blade is inhibited through the low-pressure groove and the suction effect of the injection pipe, the lift force of the blade is improved, and the appearance resistance of the blade is reduced so as to improve the utilization rate of a wind energy wind turbine.

Description

Vertical axis wind turbine for improving wind energy utilization rate
Technical Field
The utility model relates to a wind power generation technical field, concretely relates to improve wind energy utilization's vertical axis wind energy conversion system.
Background
Wind is a natural phenomenon on the earth, is caused by solar radiant heat, is available energy provided for human beings by utilizing air flow to do work, belongs to renewable energy sources, and broadly speaking, wind energy also belongs to solar energy, and the wind energy accounts for about 2 percent of the total solar energy of the earth. Although seemingly few, this is still an immense number, and scientists estimate that wind energy is about 1300 hundred million kilowatts around the world, which is 10 times greater than the total amount of water energy that can be exploited on earth, so that wind energy utilization is one of the research subjects with great prospects. The common wind turbine is a lift force type vertical axis wind turbine so as to have higher wind energy utilization coefficient, and the common method for improving the working capacity of the blades of the lift force type wind turbine is realized by improving the lift force of the blades and reducing the appearance resistance of the blades. The blade of the existing vertical axis wind turbine adopts either a method for improving the lift force of the blade or a method for reducing the appearance resistance of the blade to improve the wind energy utilization rate of the wind turbine, but cannot improve the lift force of the blade and reduce the appearance resistance of the blade to improve the wind energy utilization rate of the wind turbine at the same time.
SUMMERY OF THE UTILITY MODEL
The utility model provides an improve wind energy utilization's vertical axis wind energy conversion system to solve and to accomplish not only to promote the blade lift simultaneously but also to reduce the problem of blade appearance resistance in order to improve wind energy conversion system wind energy utilization.
The utility model adopts the following technical scheme: a vertical axis wind turbine for improving the wind energy utilization rate comprises a rotating shaft, a plurality of blades, an adjusting structure and a connecting rod, wherein the rotating shaft is arranged along the vertical direction, the plurality of blades are uniformly distributed along the circumferential direction of the rotating shaft, the blades are columnar and extend along the vertical direction, the projections of the blades in the horizontal plane are in a water drop shape with two convex sides, the projection edge at the front end is arc-shaped, the projection edge at the rear end is in an acute angle shape, the side surface of each blade, close to the rotating shaft, is a suction surface, the other side surface of each blade, far away from the rotating shaft, is a pressure surface, the connecting rod is provided with a plurality of connecting rods and uniformly distributed along the circumferential direction of the rotating shaft, one end of each connecting rod is connected with the blade, the other end of each connecting rod is connected with the rotating shaft, the adjusting structure is arranged on the blades and comprises an air inlet groove, an air outlet groove, a low pressure groove and an injection pipe, the air inlet groove is arranged at the front end, the projection on the vertical symmetrical surface of the blade is a funnel-shaped gas collection curve with a large front part and a small back part, the exhaust groove extends forwards and backwards along the axis of the air inlet groove, the front end of the exhaust groove is communicated with the back end of the air inlet groove, the back end of the exhaust groove penetrates through the blade to the back end of the blade, the low pressure groove is formed in the side wall of the suction surface and is arranged close to the back end of the blade, the ejector pipe is arranged between the exhaust groove and the low pressure groove, the ejector pipe extends upwards and downwards, the lower end of the ejector pipe inclines towards the back end of the blade, the exhaust groove and the low pressure groove are communicated, after airflow enters the interior of the blade from the front end of the air inlet groove and is accelerated through the air inlet groove, high-speed low-pressure airflow is formed in the exhaust groove by the airflow on the surface of the back end of the blade, the airflow flows through the ejector pipe and then is merged into the exhaust groove, and the merged airflow is ejected from the back end of the blade.
Furthermore, an upper cover is arranged on the low-pressure groove, an air-bleed hole is arranged on the upper cover, and the axis of the air-bleed hole is vertical to the suction surface.
Furthermore, adjust the structure and be equipped with a plurality ofly, a plurality of regulation structures are along vertical direction equipartition on the blade.
Furthermore, the low-pressure groove is arranged at a preset distance from the edge of the rear end of the blade, the preset distance is 30% of the chord length of the blade from the front end of the blade to the rear end of the blade, and the included angle between the axis of the injection pipe and the horizontal plane is forty-five degrees.
Furthermore, the radius of the injection pipe is half of the radius of the arc at the front end of the blade.
Further, the diameter size of the air guide hole is 0.8mm.
The utility model has the advantages that: the blade rotates under the action of wind power, when airflow flows to the rear end of the blade through the front end of the blade, partial airflow enters the blade through the air inlet groove, after the airflow enters the blade from the front end of the air inlet groove and is accelerated through the air inlet groove, the airflow forms high-speed low-pressure airflow in the exhaust groove, so that the airflow on the surface of the rear end of the blade can be sucked into the low-pressure groove and flows into the exhaust groove after flowing through the ejector pipe, the merged gas is sprayed out from the rear end of the blade, on one hand, the wind pressure at the front end of the blade is reduced, the appearance resistance of the blade is reduced, on the other hand, the boundary layer separation of the suction surface of the blade is inhibited through the suction action of the low-pressure groove and the ejector pipe, the lift force of the blade is improved, and meanwhile, the lift force of the blade is improved, and the appearance resistance of the blade is reduced so that the wind energy utilization rate of a wind turbine is improved.
Furthermore, the accelerated airflow is sprayed out from the rear end of the blade, so that reverse driving force is provided for the blade, and the wind energy utilization rate of the wind turbine is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
FIG. 1 is a schematic structural diagram of an embodiment of a vertical axis wind turbine for improving wind energy utilization according to the present invention;
FIG. 2 is a front view of the bucket of the present embodiment of FIG. 1;
FIG. 3 is a cross-sectional view at AA in FIG. 2;
FIG. 4 is an enlarged view taken at A in FIG. 3;
FIG. 5 is an elevational, cross-sectional view of the blade of FIG. 1;
in the figure: 1. a rotating shaft; 11. a connecting rod; 2. a blade; 3. a suction surface; 4. a pressure surface; 5. an adjustment structure; 6. an air inlet groove; 7. an exhaust groove; 8. a low pressure tank; 81. an upper cover; 82. an air vent; 9. an injection pipe.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The utility model discloses an improve wind energy utilization's vertical axis wind turbine's embodiment, as shown in FIG. 1 to FIG. 5: the utility model provides an improve wind energy utilization's vertical axis wind turbine, including pivot 1, a plurality of blades 2, adjust structure 5 and connecting rod 11, pivot 1 sets up along vertical direction, a plurality of blades 2 are along 1 circumference evenly distributed of pivot, blade 2 is the column that extends along vertical direction, the projection of blade 2 in the horizontal plane is the bellied water droplet form in both sides, and the projection edge of front end is circular-arc, the projection edge of rear end is the acute angle form, blade 2 is close to the side of pivot 1 and is suction surface 3, another side of keeping away from pivot 1 is pressure surface 4, connecting rod 11 is equipped with a plurality ofly, along 1 circumference evenly distributed of pivot, connecting rod 11 radially extends along pivot 1, one end is connected with blade 2, the other end is connected with pivot 1, it is equipped with threely to adjust structure 5, three adjust structure 5 along vertical direction equipartition on blade 2, adjust structure 5 and establish on blade 2, including air inlet duct 6, exhaust duct 7, low-pressure duct 8 and injection pipe 9, air inlet duct 6 establishes at the front end, and the projection on the vertical plane of blade 2 is the big back funnel-shaped curve of little before.
The exhaust groove 7 extends forwards and backwards along the axis of the air inlet groove 6, the front end is communicated with the rear end of the air inlet groove 6, the rear end penetrates through the blade 2 to the rear end of the blade 2, the low pressure groove 8 is arranged on the side wall of the suction surface 3, the low pressure groove 8 is arranged at a preset distance close to the rear end of the blade 2, the preset distance is 30% of the chord length of the blade 2 from the front end of the blade 2 to the rear end of the blade 2, the low pressure groove 8 is provided with an upper cover 81, the upper cover 81 is provided with an air guide hole 82, the diameter of the air guide hole 82 is 0.8mm, the axis of the air guide hole 82 is vertical to the suction surface 3, the injection pipe 9 is arranged between the exhaust groove 7 and the low pressure groove 8, draw and penetrate pipe 9 and extend and the lower extreme inclines to blade 2 rear end from top to bottom, and the axis that draws and penetrate pipe 9 is forty-five degrees with the contained angle of horizontal plane, and draw the radius size of penetrating pipe 9 and be the half of blade 2 front end circular arc radius size, draw and penetrate pipe 9 and communicate exhaust duct 7 and low-pressure groove 8, with after the air current gets into blade 2 inside by the front end of inlet duct 6, after 6 accelerations of inlet duct, the air current forms high-speed low pressure air current in exhaust duct 7, thereby make the air current on blade 2 rear end surface can be inhaled in the low-pressure groove 8, and flow through draw and penetrate pipe 9 and then merge into exhaust duct 7, the gas after the confluence is spout from blade 2 rear end.
In the embodiment, an airfoil profile handbook is searched, and an airfoil profile of the blade 2 is selected to be a symmetrical airfoil profile NACA0018, the chord length of the blade 2 is 100mm, and the span length of the blade 2 is 500mm; the number of blades 2 in each group is four.
In this embodiment, the gas collection curve is scaled according to the following equation:
R＝2.105×10 -8 x 3 -1.021×10 -6 x 2 +3.145×10 -4 x+D/2
where x is the distance from a point on the curve to the front edge of the blade 2, R is the radius of curvature of the curve at that point, and D is one third of the height of the blade 2.
With the above embodiments, the utility model discloses a usage principle and working process are as follows: when the wind turbine is used, the wind turbine is placed in a wind field, airflow enters the blade 2 from the air inlet groove 6 at the front end of the blade 2, the airflow is accelerated under the action of an air collection curve of the air inlet groove 6, the accelerated airflow flows towards the rear end of the blade 2 through the air exhaust groove 7, the air pressure in the air exhaust groove 7 is reduced, so that the airflow on the surface of the suction surface 3 is sucked into the low pressure groove 8, the airflow in the low pressure groove 8 is converged with the airflow in the air exhaust groove 7 through the injection pipe 9 and then is ejected out from the rear end of the blade 2, the separation of a boundary layer of the suction surface 3 of the blade 2 is inhibited, the lift force of the blade 2 is improved, meanwhile, part of the airflow at the front end of the blade 2 passes through the inside of the blade 2 through the adjusting structure 5, the air pressure at the front end of the blade 2 is dispersed, the appearance resistance of the blade 2 is reduced, and the wind energy utilization rate of the wind turbine is improved from two aspects.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (6)

1. A vertical axis wind turbine for improving wind energy utilization rate is characterized in that: comprises a rotating shaft, a plurality of blades, an adjusting structure and a connecting rod; the rotating shaft is arranged along the vertical direction;
the blades are uniformly distributed along the circumferential direction of the rotating shaft; the blades are columnar extending along the vertical direction; the projection of the blade in the horizontal plane is in a water drop shape with two convex sides, the projection edge of the front end is in an arc shape, and the projection edge of the rear end is in an acute angle shape; the side surface of the blade close to the rotating shaft is a suction surface, and the other side surface of the blade far away from the rotating shaft is a pressure surface; a plurality of connecting rods are arranged and are uniformly distributed along the circumferential direction of the rotating shaft; the connecting rod extends along the radial direction of the rotating shaft, one end of the connecting rod is connected with the blade, and the other end of the connecting rod is connected with the rotating shaft;
the adjusting structure is arranged on the blade and comprises an air inlet groove, an air exhaust groove, a low-pressure groove and an injection pipe; the air inlet groove is arranged at the front end, and the projection on the vertical symmetrical surface of the blade is a funnel-shaped air collection curve with a large front part and a small back part; the exhaust groove extends forwards and backwards along the axis of the air inlet groove, the front end of the exhaust groove is communicated with the rear end of the air inlet groove, and the rear end of the exhaust groove penetrates through the blade to the rear end of the blade; the low-pressure groove is arranged on the side wall of the suction surface and is close to the rear end of the blade; the injection pipe is arranged between the exhaust groove and the low pressure groove, extends up and down, is inclined towards the rear end of the blade at the lower end and communicates the exhaust groove with the low pressure groove.
2. The vertical axis wind turbine for improving wind energy utilization rate according to claim 1, wherein: the low-pressure groove is provided with an upper cover which is provided with an air guide hole; the axis of the air guide hole is vertical to the suction surface.
3. The vertical axis wind turbine for improving wind energy utilization rate according to claim 2, wherein: the adjusting structure is provided with a plurality of adjusting structures which are uniformly distributed on the blade along the vertical direction.
4. The vertical axis wind turbine for improving wind energy utilization rate according to claim 1, wherein: the low-pressure groove is arranged at a preset distance away from the edge of the rear end of the blade; the preset distance is thirty percent of the chord length of the blade from the front end of the blade to the rear end of the blade; the included angle between the axis of the injection pipe and the horizontal plane is forty-five degrees.
5. The vertical axis wind turbine for improving wind energy utilization according to claim 4, wherein: the radius of the injection pipe is half of the radius of the arc at the front end of the blade.
6. The vertical axis wind turbine for improving wind energy utilization rate according to claim 2, wherein: the diameter size of the air guide hole is zero eight millimeters.
CN202220539639.7U 2022-03-14 2022-03-14 Vertical axis wind turbine for improving wind energy utilization rate Active CN217813756U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202220539639.7U CN217813756U (en) 2022-03-14 2022-03-14 Vertical axis wind turbine for improving wind energy utilization rate

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202220539639.7U CN217813756U (en) 2022-03-14 2022-03-14 Vertical axis wind turbine for improving wind energy utilization rate

Publications (1)

Publication Number Publication Date
CN217813756U true CN217813756U (en) 2022-11-15

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ID=83980521

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202220539639.7U Active CN217813756U (en) 2022-03-14 2022-03-14 Vertical axis wind turbine for improving wind energy utilization rate

Country Status (1)

Country Link
CN (1) CN217813756U (en)

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