KR20090017341A - Vertical axis wind turbine with wingletted cam-tiltable blades - Google Patents

Abstract

A vertical axis wind turbine including wingletted cam-tiltable blades is provided to receive wind energy from various directions by automatically setting the blades with guide sections. A vertical axis wind turbine comprises a generator, a shaft(20) mounted on the generator, one or more blade sets(40) mounted on the shaft, and a cam shaft which is arranged in the shaft and supports a cam unit equipped with a guide member. The blade sets rotate around the shaft and include a blade rod(42) supporting the blade(43). The blade rod includes a crank arm contacting with the guide unit so that the blades are guided in order to receive the wind pressure optimally.

Description

VERTICAL AXIS WIND TURBINE WITH WINGLETTED CAM-TILTABLE BLADES}

FIELD OF THE INVENTION The present invention relates to a vertical axis wind turbine with a winglet cam-tilting blade, in particular controlling the tilting or swiveling angle of the blade so that the blade is in a windward position. Guide means, consisting of a cam and crank arm, which are automatically set to receive wind energy from various directions, allowing the shaft to drive a generator even under low wind conditions and thus achieving optimal power generation performance, And a vertical axis wind turbine utilizing aerodynamic forces.

As the consumption of fossil fuels increases, the reserves of fossil fuels are gradually being depleted and the levels of carbon dioxide are raised, leading to serious "greenhouse" phenomena in the global atmosphere. The United Nations, therefore, is enacting and coordinating efforts to address global warming. In recent years, many countries around the world have been working hard on the development of renewable energy, and wind energy is the best of such alternatives, because wind power stations emit no carbon dioxide and nuclear power. This is because there is no danger of contamination by.

Power is considered "progressive" energy and could be applied to a very wide field. Electricity is also the basis of modern civilization and the most essential in modern society.

In general, known horizontal axis wind stations require a tower about 50 meters high, which includes a generator and a blade assembly located on top of the tower for driving the generator. As a result, the tower becomes very bulky, expensive and difficult to maintain. Thus, it is clear that the known configuration of horizontal axis wind turbines is not an ideal solution for wind stations.

Conventional references in which windmills or wind turbine generators are described or discussed are described, for example, in US Pat. No. 4,496,283; 384,232; 440,266; 505,736; 685,774; 830,917; 1,076,713; 4,534,703; 4,679,985; 4,818,180; 5,256,034; 4,220,870; 7,118,344; 6,749,399; 963,359; 5,269,647; 6,000,907; 6,537,018; 5,083,902; 6,749,393; 863,715; 4,509,899; 4,421,458; 6,726,439; 5,195,871; And 4,245,958, but is not limited to such. These known references have at least the following disadvantages in common.

(1) the configuration is complicated and difficult to assemble, thereby increasing the cost;

(2) the turning or tilting of the blades in the direction of the incoming air flow is not carried out by aerodynamic forces, and thus the wind vanes coupled to the blades by a transmission mechanism. As such, additional devices are needed to pivot or tilt the blades; And

(3) The design of the structure is poor, because a large initial driving force is required to pivot the blades in the direction of the wind, so that the blades cannot be properly turned under low wind speed conditions, resulting in increased power generation efficiency. Will be degraded.

U.S. Patent 3,995,170; 6,688,842; And 6,749,394 are known, none of which discloses the effective use of aerodynamic forces, which references have the following disadvantages;

(1) All the blades are individually aligned in a vertical state and are not interconnected to facilitate pivoting (the blades of US Pat. No. 3,995,170 are interconnected, but a transfer mechanism is required for such interconnection), accordingly The initial driving force for turning the blades is very large;

(2) The blades are turned in the direction of the wind by a huge initial driving force (up to an angle of up to 180 degrees), so that the blades cannot be turned under low wind speed conditions, which in turn lowers the power generation efficiency.

(3) The blades cannot be well designed or constructed so that the blades can be easily pivoted using a small initial driving force.

Conventional references, such as US Pat. No. 4,383,801, utilize large wind vanes to facilitate the turning of the blade through the cam. Such known devices have at least the following disadvantages:

(1) the configuration is complicated and difficult to assemble, thus increasing the cost; And

(2) The turning of the blades is driven by mechanical transmission, so that the initial driving force for turning the blades becomes very large and the blades cannot be turned under low wind speed conditions, which lowers the power generation efficiency.

Additional references, such as Chinese patent 96120092.8, disclose a blade turning system that uses wind vanes to track the wind direction and generates an electronic signal for controlling a servo motor that turns the blade, but the blade is only driven by the servo motor. It must be driven, which leads to power consumption and increases the risk of failure due to the effects of undesirable temperature and / or humidity of the electronic components. In addition, a motor must be mounted on the rotary member and the rotary joint must be configured to deliver power, which increases the risk of failure.

In addition, the techniques described in the references, such as Chinese Patent 02232245.0, have several disadvantages such as:

(1) A large initial driving force is required to tilt or pivot the blades in the direction of the incoming air flow, and in general, the tilting or turning of the blades is not possible at low wind speed conditions, and thus the power generation efficiency is quite low.

(2) The design of the blades is poor, including the use of additional winglets to facilitate tilting or turning of the blades, thus requiring a large initial driving force for the turning of the blades.

Thus, known techniques / apparatuses are not good enough. The inventors of the present invention have invested time and energy in the development of wind turbines through experiments and tests. Accordingly, the present invention aims to alleviate and / or alleviate the disadvantages of known devices by providing a vertical axis wind turbine with a winglet cam-tilting blade.

According to the present invention, there is provided a vertical axis wind turbine with a winglet cam-tilting blade, the wind turbine comprising: a generator, a shaft interconnected to the generator, and a plurality of blade sets coupled to the shaft. . A cam member is provided inside the shaft and has guide sections of a predetermined shape. The blade set includes blades associated with the crank arm in contact with the guide section. Thus, when the blades are positioned in the wind-facing position and the lee-windward position respectively, the blades are guided by the guide sections to accommodate the wind energy from the various directions. It is automatically and easily set to acceptance conditions and minimum wind-resistance conditions, so that at low wind speeds the shaft can rotate to achieve optimum power.

The above objects and summary are briefly introduced to the present invention. In order to fully understand the present invention and these and other objects of the present invention, the following detailed description and claims should be read with reference to the accompanying drawings, and the present invention will be clearly understood by those skilled in the art. . Throughout the specification and drawings, like reference numerals refer to like or similar parts.

DETAILED DESCRIPTION Referring to the detailed description and the accompanying drawings, those skilled in the art will clearly understand many other advantages and features of the present invention, which illustrate a preferred embodiment that incorporates the principles of the present invention.

With reference to the accompanying drawings, from the following description of the preferred embodiments of the present invention, those skilled in the art will clearly understand the present invention.

According to the present invention, the blades can be automatically and easily set to optimal pressure-accommodating conditions and minimum wind-resistance conditions respectively, thus receiving wind energy from different directions and thus optimal power generation performance. Can be provided.

The following description is merely illustrative and is not intended to limit the scope, applicability, or configuration of the present invention. The following provides a description of the implementation of an exemplary embodiment of the invention. Various changes to the described embodiments will be possible without departing from the scope of the invention as set forth in the claims, within the scope and function of the described elements.

1 to 6, a vertical axis wind turbine constructed in accordance with the present invention comprises a generator 10, a shaft 20, a first cam member 31, a second cam member 32, and a plurality of wind turbines. Blade set 40, cam driver device 50, and support frame 60. The blade set 40 includes blades 43 respectively coupled to the crank arm 44, which crank arms are coupled to the guide sections 311, 321 of the first and second cam members 31, 32. . When the blades 43 are in the wind direction and the semi-wind direction, respectively, the blades are operated by the guide sections 311 and 321 to automatically and easily, respectively, with optimum pressure-accepting conditions and minimum wind-resistance conditions, respectively. It can be set in such a way that it can receive wind energy from various directions and thus provide optimum power generation performance. Hereinafter, a preferred embodiment of the present invention will be described in more detail.

The generator 10 functions to convert mechanical energy of the rotating phase into electric power.

The shaft 20 is coupled to the generator 10 by gears 11, 12, and the rotation of the shaft 20 functions to drive the generator 10 to produce power. The hollow shaft 20 includes a cam shaft 21 and an outer jacket 22 mounted on the cam shaft 20.

The first cam member 31 and the second cam member 32 are vertically aligned and mounted on the outer jacket 22. The first cam member 31 and the second cam member 32 are fixed to the cam shaft 21 and the jacket 22 by fastening members. The jacket 22 forms a slot 221 at the position where each engagement member extends, allowing the cam shaft 21 to move the first cam member 31 downward by a predetermined distance. The first and second cam members 31, 32 have opposing faces, between which the guide channel 33 is located. The opposing faces also act as guide sections 311 and 321 respectively, which guide sections have inclined sections 312 and 322 at two diagonally facing points.

The blade set 40 is stacked in an alternating manner with each other, and the upper-level blade set and the lower-level blade set are fixed to the shaft 20 and each pair of blade sets are fixed as a single module. 40 is aligned so as to include parts that are aligned in opposite directions on opposite sides of the shaft 20. If desired, one pair of upper- and lower-level blade sets can be used, or instead, one or more additional blade sets, based on local topography and wind fields. By further stacking pairs of can increase the power generation efficiency. The blade set 40 includes a frame 41 which is located at each side of the shaft 20 and has a remote free end that forms a winglet 411 for reducing wind resistance. The frame 41 rotatably supports a plurality of blade rods 42, each blade rod having a blade 43. Each blade rod 42 has a base end that defines a crank arm 44 that extends into the corresponding guide channel 33 for engaging the guide sections 311, 321 in a movable manner. The inner end located at the base of the blade 43 is set at a predetermined angle and forms a second winglet 45 which facilitates the concentration of the inlet wind pressure.

The cam driver device 50 includes a wind vane assembly 51 accommodated in the shaft 20 with the wind vanes projecting outwardly upward of the shaft 20, and the wind direction aligned below the wind vane assembly 51. Sensor 52, a stand 53, a first motor 54 and a second motor 55, to which the threaded section 211 at the lower end of the camshaft 21 is coupled in a threaded manner; The first motor 54 drives the camshaft 21 with the threaded section 211 axially via the gears 541, 542 and the second motor 55 via the gears 551, 552. The cam shaft 21 and the jacket 22 are driven to rotate in relation to the rotation of the wind vane and the change in the direction thereof. The second motor 55 is activated by the wind direction sensor 52 when the wind vane assembly 51 is rotated by air flow or wind.

The support frame 60 consists of a plurality of horizontal and vertical bars 61 forming a multi-level framework for supporting the shaft 20.

7 and 8, when the wind turbine of the present invention is actuated by wind (as indicated by the arrow), the first cam member 31 and the second cam member 32 are connected to the wind vane assembly ( Is set to a predetermined predetermined position according to the direction indicated by 51). The blades 43 on one side of the top-level blade set 40 are guided by the first cam member 31 and the second cam member 32 and, by aerodynamic forces, the vertical blades 43 It automatically turns to a vertical position subject to great wind pressure. On the other hand, the blade 43 on the other side of the upper-level blade set 40 is guided by the first cam member 31 to set the initial turning angle, and due to the wind pressure acting on the blade 43, It automatically turns to a horizontal state where wind resistance is minimized, so that the blade set 40 drives the shaft 20 to rotate counterclockwise, for example. At the same time, the lower-level blade set 40 is substantially parallel to the air flow of the wind, and thus loses wind pressure (and thus loses force), but one of the lower-level blade sets 40 The blades 43 on the side are in a horizontal state and are ready to be turned vertically by the aerodynamic forces of the wind.

9 shows a subsequent state of the state shown in FIG. As the upper- and lower-level blade sets 40 further rotate counterclockwise, the blades 43 of the lower-level blade set 40 in a horizontal state ready to receive the aerodynamic forces of the wind. (The blades 43 on the other side of the lower-level blade set 40 are in an upright position) and cause the crank arm 44 to move along the inclined section 322 of the second cam member 32. Thus causing their initial angle to be changed by cam action. After such a change in angle, the blades 43 are subjected to wind pressure and can therefore be swung up automatically and easily. When the blades 43 are pivoted and approach the upright position, the blades 43 engage with the inclined section 322 of the guide section 311 of the first cam member 31 and are thus automatically stopped. Here, the blades 43 together form a vertical surface, which acts as an optimum wind-receiving surface that effectively receives wind pressure for rotationally driving the shaft 20.

FIG. 10 also shows the subsequent state of FIG. 7. When the blades 43 on one side of the lower-level blade set 40 begin to receive wind pressure and are pivoted to form a vertical surface, the blades on the other side of the lower-level blade set 40 that were originally vertical ( 43) begin to have a semi-wind orientation. The crank arm 44 reaches the inclined section 312 of the guide section 311 of the first cam member 31 and thus an angle change is induced so that the blade 43 which was in the vertical state is horizontal, i.e. It easily turns with low wind resistance.

11 and 12, when the blades 43 on one side of the lower-level blade set 40 are in a vertical state and under the greatest wind pressure, the blades on the other side of the lower-level blade set 40 are The 43 are located in a semi-wind oriented position and provide minimal wind resistance. At this moment, the upper-level blade set 40 is substantially parallel to the direction of the air flow of the wind, so that the wind pressure is lost (and thus the force is lost), and the lower-level blade set 40 is upper- The rotational force of the level blade set 40 is inherited. In that case, wind energy in variable directions can be intersected and optimal power generation performance can be ensured so that the shaft 20 can be rotated to drive the generator 10 even at low wind speeds.

13, 14 and 15, the threaded section 211 is moved vertically downwards in the stand 53, so that the first cam member is moved vertically downwards by a predetermined distance so that the guide channel ( In order to reduce the width of 33, the cam shaft 21 is rotated by the first motor 54 of the cam driver device 50. This reduces the moving range of the blade 43. When the wind speed is high, the wind pressure may be adjusted by adjusting the moving range of the blade 43 in order to prevent damage caused by excessive wind speed.

While the present invention has been described with reference to preferred embodiments, it will be apparent to those skilled in the art that various modifications and variations are possible within the scope of the invention as set forth in the claims.

1 is a perspective view of a vertical axis wind turbine constructed in accordance with the present invention.

2 is an exploded view of a blade set of a vertical axis wind turbine according to the present invention.

3 and 4 are perspective views showing the operation of the vertical axis wind turbine of the present invention.

Fig. 5 is a perspective view, partly in cross section, of the camshaft of the vertical axis wind turbine of the present invention.

6 is a partial cross-sectional perspective view of the cam driver device of the vertical wind turbine of the present invention.

7 is a perspective view showing the operation of the vertical axis wind turbine of the present invention.

8 is a cross-sectional view taken along the line A-A of FIG.

9A, 9B, and 9C are cross-sectional views taken along the line B-B in FIG. 7, showing the operating states of the blades turning upward from the horizontal state to the vertical state.

10A, 10B, and 10C are cross-sectional views taken along the line C-C in FIG. 7, showing the operating states of the blades turning from the vertical state to the horizontal state.

11 is a perspective view showing the operation of the vertical axis wind turbine of the present invention.

12 is a perspective view showing an operating state of a shaft of the vertical axis wind turbine of the present invention for driving a generator for power generation.

13 and 14 are partial cross-sectional perspective views showing a cam driver device for moving the first cam member downward in the vertical axis wind turbine of the present invention.

15 is a cross-sectional view illustrating angle adjustment of the blades by the downward movement of the first cam member.

Claims (9)

As vertical axis wind turbine: generator; A shaft mounted to the generator; And One or more blade sets mounted to the shaft; A cam shaft is arranged inside the shaft, the cam shaft supporting cam means having a guide means of predetermined shape, the blade set being rotatably connected to the shaft and on opposite sides of the shaft. One or more blade rods for supporting the blades aligned with the blade rod, the blade rods having a crank arm in contact with the guide means, the blades being positioned respectively in the wind and semi-wind direction. The blades are then guided by the guide means to receive wind energy from various directions, automatically and easily set to an optimum pressure-receiving position and a minimum wind-resistance position, respectively, so that the shaft at low wind speeds. Can be rotated to induce optimal power generation performance. Vertical axis wind turbine. The method of claim 1, And the cam means comprises a first cam member, a second cam member, and a guide channel between the cam members for receiving the crank arm. The method of claim 2, A jacket is mounted between the cam shaft and the cam means, and the first cam member and the second cam member are fixed to the jacket and the cam shaft by fastening members, respectively, and the vertical motion of the cam shaft is controlled by the first cam member. 1. The vertical axis wind turbine of claim 1, wherein the jacket defines a slot through which a locking member secured to the cam shaft extends to move the cam member integrally with the cam shaft. The method of claim 1, Vertical axis wind turbine wherein the cam means has an inclined section. The method of claim 1, A vertical axis wind turbine having a winglet in which the blades are set at a predetermined angle at a predetermined position. The method of claim 1, And said blade set comprises a frame having a winglet formed at an edge thereof. The method of claim 3, wherein The cam shaft is driven by a cam driver device, the cam driver device including a cam shaft forming a threaded section, a stand threadedly coupled to the threaded section, and a first motor coupled to the cam shaft. Vertical axis wind turbine. The method of claim 1, The cam shaft is driven by a cam driver device, the cam driver device having a wind vane received inside the shaft and having a wind vane projecting outward from the top of the shaft, a wind direction sensor coupled to the wind vane assembly. And a second motor coupled to the camshaft and activated by the wind direction sensor. The method of claim 1, And a support rack for rotatably supporting the shaft, wherein the support rack consists of a plurality of bars forming a framework.

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