CN212225435U

CN212225435U - V-shaped vertical shaft wind turbine with automatic speed limiting function

Info

Publication number: CN212225435U
Application number: CN202020835143.5U
Authority: CN
Inventors: 冯国英
Original assignee: Wuhan Institute of Technology
Current assignee: Wuhan Institute of Technology
Priority date: 2020-05-19
Filing date: 2020-05-19
Publication date: 2020-12-25
Anticipated expiration: 2030-05-19

Abstract

The utility model relates to a V-shaped vertical shaft wind turbine with automatic speed limiting function, which comprises a generator and a plurality of groups of blade assemblies which are evenly distributed along the circumference of a rotating shaft of the generator at intervals, wherein the plurality of groups of blade assemblies are all obliquely arranged, the lower ends of the blade assemblies are all rotatably connected with the top of the generator and can be positioned and turned up and down; under the action of wind power, the blade assembly turns up and down to enable the upper ends of the blade assembly to be close to or far away from each other so as to adjust the inclination of the blade assembly. The utility model has the advantages of simple structure, better speed limiting effect, lower cost and high reliability; in addition, compared with the existing straight blade vertical shaft wind turbine, the wind turbine does not need a blade support, so that the cost is saved, and the influence of support wake flow on the efficiency of the wind wheel is avoided.

Description

V-shaped vertical shaft wind turbine with automatic speed limiting function

Technical Field

The utility model relates to a wind energy conversion system technical field, concretely relates to V type vertical scroll wind energy conversion system with automatic speed limit function.

Background

At present, the large wind turbine mostly adopts active pitch control to carry out speed-limiting protection, however, the speed-limiting protection mode is too expensive and is not suitable for the small wind turbine. The small wind turbine is divided into a horizontal shaft wind turbine and a vertical shaft wind turbine. The speed limiting method of the small wind turbine comprises the steps of wind wheel lateral deviation or upward pitch, passive stall and passive variable pitch control, and can be used for passive variable pitch control of the vertical shaft wind turbine.

The existing speed-limiting protection methods have the disadvantages of relatively complex required structures, special production and manufacture of required devices and high cost. The small wind turbine is low in price, and most users lack professional maintenance knowledge, so that the small wind turbine is required to be low in manufacturing cost, simple in structure as far as possible and rarely required to be maintained. Therefore, the miniature wind turbine is not provided with any speed limiting device. Due to the lack of reliable speed-limiting protection devices, small wind turbines are very easy to damage wind wheel blades or generators when encountering strong wind.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a V type vertical scroll wind energy conversion system with automatic speed limit function is provided, aim at solving above-mentioned technical problem.

The utility model provides an above-mentioned technical problem's technical scheme as follows:

a V-shaped vertical shaft wind turbine with an automatic speed limiting function comprises a generator and a plurality of groups of blade assemblies which are uniformly distributed at intervals along the circumferential direction of a rotating shaft of the generator, wherein the plurality of groups of blade assemblies are all obliquely arranged, the lower ends of the blade assemblies are all rotatably connected with the top of the generator and can be positioned and turned up and down; under the action of wind power, the blade assemblies are turned up and down to enable the upper ends of the blade assemblies to be close to or far away from each other so as to adjust the inclination of the blade assemblies.

The utility model has the advantages that: under the action of wind force, the blade assembly overturns up and down to enable the upper ends of the blade assembly to be close to or far away from each other so as to adjust the inclination of the blade assembly, and therefore the effective stress area of the blade assembly is adjusted, and the speed of the generator is limited. The utility model has simple structure, better speed limiting effect, lower cost and high reliability; in addition, compared with the existing straight blade vertical shaft wind turbine, the wind turbine does not need a blade support, so that the cost is saved, and the influence of support wake flow on the efficiency of the wind wheel is avoided.

On the basis of the technical scheme, the utility model discloses can also do following improvement.

Further, the blade subassembly encloses the rotatable installation of level in the space that closes and is used for restricting the multiunit the carousel of blade subassembly upset, the coaxial pivoted cover of carousel is established the top of pivot.

The beneficial effect who adopts above-mentioned further scheme is through carousel and the cooperation of multiunit blade subassembly, is convenient for adjust the gradient of blade subassembly to carry out the speed limit to the generator.

Further, every group the blade subassembly all includes the blade, the blade slope can overturn install one side of carousel, its upper end through tensile piece with the carousel is connected, the lower extreme with the top of generator is rotated and is connected.

The beneficial effect who adopts above-mentioned further scheme is that the blade passes through spring and cable and carousel cooperation, and the gradient of adjusting the blade under the wind-force effect, simple structure adjusts the convenience.

Further, the extension piece is a spring, one end of the spring is fixedly connected with the rotary disc, and the other end of the spring is connected with the upper end of the blade through a stay cable.

The beneficial effects of adopting the above-mentioned further scheme are that simple structure adjusts the convenience.

Furthermore, the lower extreme fixedly connected with of blade changes the board, change the board and extend along the length direction of blade, its one end with the rotation of generator is connected.

The beneficial effects of adopting above-mentioned further scheme are that simple structure, commentaries on classics board and blade cooperation can strengthen the intensity of blade, be convenient for connect and hinged joint.

Furthermore, one end of the rotating plate is connected with a supporting plate through a hinge piece, and the supporting plate is horizontally arranged and fixed at the top of the generator.

The beneficial effects of adopting above-mentioned further scheme are that simple structure adjusts the convenience, increases the stability that the blade was adjusted.

Further, the hinged member is a hinge.

Furthermore, a limiter used for limiting the turning direction of the blade is fixedly arranged on the supporting plate.

The beneficial effect who adopts above-mentioned further scheme is that through stopper control blade only allow the blade outwards to overturn under the wind-force effect, the contained angle increase of blade and perpendicular pivot promptly, the contained angle that does not allow blade and vertical axis reduces.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is the distribution principle diagram of the force of the middle blade of the utility model.

In the drawings, the components represented by the respective reference numerals are listed below:

1. blade subassembly, 2, carousel, 3, blade, 4, spring, 5, cable, 6, swivel plate, 7, backup pad, 8, hinge, 9, generator, 10, pivot.

Detailed Description

The principles and features of the present invention will be described with reference to the drawings and the embodiments, which are provided for illustration only and are not intended to limit the scope of the invention.

As shown in fig. 1 and 2, the utility model provides a V-shaped vertical shaft wind turbine with automatic speed limiting function, which comprises a plurality of groups of blade assemblies 1 distributed along the circumference of a rotating shaft 10 of a generator 9 at even intervals, wherein the plurality of groups of blade assemblies 1 are all arranged obliquely, the lower ends of the blade assemblies are all rotationally connected with the top of the generator 9, and the blade assemblies can be positioned and turned over up and down; under the action of wind, the blade assembly 1 is turned up and down to enable the upper ends of the blade assembly to be close to or far away from each other so as to adjust the inclination of the blade assembly. Under the action of wind power, the blade assembly 1 is turned up and down to enable the upper ends of the blade assembly 1 to be close to or far away from each other so as to adjust the inclination of the blade assembly, and therefore the effective stress area of the blade assembly 1 is adjusted, and further the speed of the generator 9 is limited. The utility model has simple structure, better speed limiting effect, lower cost and high reliability; in addition, compared with the existing straight blade vertical shaft wind turbine, the wind turbine does not need a blade support, so that the cost is saved, and the influence of support wake flow on the efficiency of the wind wheel is avoided.

Example 1

On the basis of above-mentioned structure, in this embodiment, the rotatable carousel 2 that installs of level is used for restricting the upset of multiunit blade subassembly 1 in the space that multiunit blade subassembly 1 encloses, and 2 coaxial pivoted covers of carousel are established at the top of pivot 10, and carousel 2 cooperates with multiunit blade subassembly 1, through carousel 2 and multiunit blade subassembly 1 cooperation, are convenient for adjust blade subassembly 1's gradient to carry out the speed limit to generator 9.

The rotating cover of the turntable 2 is arranged at the upper end of a rotating shaft 10 of the generator 9

Example 2

On the basis of the first embodiment, in the present embodiment, each set of blade assemblies 1 includes a blade 3, the blade 3 is tiltably and tiltably mounted on one side of the turntable 2, and the upper end of the blade is connected with the turntable 2 through a stretching member. The blade 3 is matched with the rotary disc 2 through a spring 4 and a guy cable 5, and the lower end of the blade is rotationally connected with the top of the generator 9. The inclination of the blade 3 is adjusted under the action of wind power, the structure is simple, and the adjustment is convenient.

Example 3

On the basis of the second embodiment, in this embodiment, the tension member is a spring 4, one end of the spring 4 is fixedly connected with the turntable 2 in a manner that can be thought by those skilled in the art, the other end of the spring is connected with the upper end of the blade 3 through a cable 5, and two ends of the cable 5 are respectively fixedly connected with the other end of the spring 4 and the upper end of the blade 3 in a manner that can be thought by those skilled in the art, so that the structure is simple and the adjustment is convenient.

Example 4

On the basis of the second embodiment, in the present embodiment, the lower end of the blade 3 is fixedly connected with the rotating plate 6, and the other end of the rotating plate 6 is fixedly connected with the lower end of the blade 3 by a way that can be conceived by those skilled in the art, such as welding or bolting; the rotating plate 6 extends along the length direction of the blade 3, one end of the rotating plate is connected with the generator 9 in a rotating mode, the structure is simple, and the rotating plate 6 is matched with the blade 3, so that the blade 3 can be adjusted conveniently.

Example 5

On the basis of the fourth embodiment, in this embodiment, one end of the rotating plate 6 is connected with the supporting plate 7 through the hinge, the supporting plate 7 is horizontally arranged and fixed on the top of the generator 9 through a mode that can be thought by those skilled in the art, the structure is simple, the adjustment is convenient, and the stability of the adjustment of the blades 3 is increased.

Preferably, in the embodiment, the hinge member is a hinge 8, so that the structure is simple and the adjustment is convenient.

Example 6

On the basis of the fifth embodiment, in the present embodiment, the supporting plate 7 is fixedly provided with a stopper for limiting the turning direction of the blade 3, and the blade 3 is controlled by the stopper to only allow the blade to turn outwards under the action of wind, that is, the included angle between the blade and the vertical rotating shaft is increased, and the included angle between the blade and the vertical shaft is not allowed to be reduced.

In addition, the multiple groups of blade assemblies 1 are uniformly distributed around the rotating shaft 10 of the generator 9 at intervals in the circumferential direction, the structure is simple, the distribution is reasonable, and the running efficiency of the wind wheel is ensured.

It should be noted that the limiter is an amplitude limiter in the prior art.

The specific connection mode of the generator 9 and the automatic speed limiting device is as follows: the support plates 7 of the multiple sets of blade assemblies 1 are fixed on the top of the generator 9 at even intervals along the circumferential direction by means of bolts or welding, which will occur to those skilled in the art, the rotating shaft 10 on the generator 9 extends vertically upwards, the upper end of the rotating shaft 10 passes through a through hole in the center of the rotating disc 2, and the rotating disc 2 can rotate around the rotating shaft 10.

The generator 9 is a conventional one.

The working principle of the utility model is as follows:

after the wind wheel in the generator 9 is started, the stress condition of the blade 3 is as shown in fig. 2, and the stress condition comprises the gravity of the blade 3 and the rotating plate 6 and the inertial centrifugal force thereof, the pulling force of the guy cable 5 acting on the blade 3 and the supporting force of the rotating plate 6, and the magnitude of the inertial centrifugal force is in direct proportion to the square of the angular velocity of the blade 3;

when the rotating speed of the wind wheel is lower than the set rotating speed, the tension of the stay cable 5 is smaller than the initial tension of the spring 4, and the blade 3 is in the initial position; along with the increase of the rotating speed of the wind wheel, the centrifugal force of the blade 3 is increased, the tensile force of the stay cable 5 is increased, when the rotating speed exceeds the set rotating speed, the spring 4 extends under the action of the tensile force, and the blade 3 rotates by an angle around the hinge 8.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. The utility model provides a V type vertical scroll wind energy conversion system with automatic speed limit function which characterized in that: the device comprises a generator (9) and a plurality of groups of blade assemblies (1) which are uniformly distributed at intervals along the circumferential direction of a rotating shaft (10) of the generator (9), wherein the plurality of groups of blade assemblies (1) are all obliquely arranged, the lower ends of the blade assemblies are all rotatably connected with the top of the generator (9), and the blade assemblies can be positioned and turned up and down; under the action of wind power, the blade assembly (1) is turned up and down to enable the upper ends of the blade assembly to be close to or far away from each other so as to adjust the inclination of the blade assembly.

2. The V-shaped vertical shaft wind turbine with the automatic speed limiting function according to claim 1, characterized in that: the blade subassembly (1) encloses the rotatable carousel (2) of installing of level in the space that closes and is used for restricting the multiunit blade subassembly (1) upset, the coaxial pivoted cover of carousel (2) is established the top of pivot (10).

3. The V-shaped vertical shaft wind turbine with the automatic speed limiting function according to claim 2, characterized in that: each group of blade assemblies (1) comprises blades (3), the blades (3) are obliquely and invertedly arranged on one side of the rotary disc (2), the upper ends of the blades are connected with the rotary disc (2) through stretching pieces, and the lower ends of the blades are rotatably connected with the top of the generator (9).

4. The V-shaped vertical shaft wind turbine with the automatic speed limiting function according to claim 3, characterized in that: the extension piece is a spring (4), one end of the spring (4) is fixedly connected with the rotary disc (2), and the other end of the spring is connected with the upper end of the blade (3) through a stay cable (5).

5. The V-shaped vertical shaft wind turbine with the automatic speed limiting function according to claim 3, characterized in that: the lower extreme fixedly connected with of blade (3) changes board (6), change board (6) are followed the length direction of blade (3) extends, its one end with the rotation of generator (9) is connected.

6. The V-shaped vertical shaft wind turbine with the automatic speed limiting function according to claim 5, characterized in that: one end of the rotating plate (6) is connected with a supporting plate (7) through a hinge piece, and the supporting plate (7) is horizontally arranged and fixed at the top of the generator (9).

7. The V-shaped vertical shaft wind turbine with the automatic speed limiting function according to claim 6, characterized in that: the hinged part is a hinge (8).

8. The V-shaped vertical shaft wind turbine with the automatic speed limiting function according to claim 6, characterized in that: and a limiter used for limiting the turning direction of the blade (3) is fixedly arranged on the supporting plate (7).