JP5326139B2 - Wind power generator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wind power generator capable of constantly obtaining substantially constant stable generation output under a condition ranging from gentle wind to strong wind. <P>SOLUTION: A wind power generator consists of: a wind turbine rotary shaft 13; a cam support shaft 16 containing a cam 15 arranged in proximity to a surface of the wind turbine shaft; a rotary shaft 18 arranged in an upper end of the cam support shaft and in a vertical direction with respect to an elliptical long side of the cam 15; a blade 19 each having a base 19a connected to an upper end of the cam support shaft 16 so as to be rotatable around the rotary shaft; a first spring 22 containing a movable part 21 coming into contact with an outer periphery of the cam 15; and a second spring 28 containing a movable part 27 coming into contact with the blade 19 through an arm 26. The blade 19 rotates around the camshaft 16 at an angle corresponding to wind power. The rotary shaft 18 is made perpendicular to the wind turbine rotary shaft 13 by a certain wind power. The blade 19 rotates around the rotary shaft 18 by more than the certain wind power. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a wind power generator, and more particularly, to a wind power generator including a windmill that can automatically adjust the angle of blades and make the power generation output substantially constant in response to wind power.

  Conventionally, wind power generators have been widely used in practice, but in a typical example, a wind turbine having blades having a narrow width and a long radius is used, and therefore, the height of a pole supporting the wind turbine is high. And a large installation area is required. In these wind power generators, if the wind power is weak, the power generation output is low, and if the wind power is strong, the power generation output is high, but if the wind power is further strong, the windmill may be damaged.

  The present invention has been made based on the above-described circumstances, and an object of the present invention is to provide a wind power generator that can obtain a substantially constant and stable power generation output from a breeze to a strong wind.

The wind power generator according to the present invention includes a windmill rotating shaft and a cam disposed in proximity to the outer peripheral surface of the windmill rotating shaft, and is rotatably supported at the upper end portion of the cam shaft. A rotating shaft disposed in a direction perpendicular to the elliptical long side of the cam; and a base that is rotatable about the cam shaft and rotatable about the rotating shaft. a blade connected to the upper end of the cam shaft, a first spring having a movable portion in contact with the outer periphery of the cam, a second spring having a movable portion connected through the blade and the arm, the Prepare.

  Here, the blades rotate around the camshaft at an angle corresponding to the wind force at a constant wind force (for example, a wind speed of about 10 m / s), and the rotating shaft that supports the blades with the constant wind force rotates relative to the windmill rotating shaft. The blades are rotated substantially around the rotation axis by wind force beyond that.

  Corresponding to the two-stage wind speed range (for example, 10 m / s or less) of the angle adjustment mechanism around the cam axis of the blade by the cam and the first spring and the angle adjustment mechanism around the rotation axis of the blade by the arm and the second spring With the automatic rotation control of the blades, even if the wind force fluctuates from a slight wind to a strong wind of the typhoon class, a substantially constant and stable torque can be taken out. As a result, a stable power generation output can be taken out and The damage can be prevented even under strong winds.

It is sectional drawing of the wind power generator of one Embodiment of this invention. (A) is a top view which shows the relationship between a cam and a 1st spring, (b) is the side view. It is a front view of the windmill which shows the structural example of a blade | wing.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 to 3. In addition, in each figure, the same code | symbol is attached | subjected and demonstrated to the same or equivalent member or element.

  In FIG. 1, a windmill fixing portion 12 is mounted on a pole 11, and a windmill rotating shaft 13 is rotatably supported by a thrust and radial bearing 14. The rotation of the windmill rotating shaft 13 is transmitted to the gears 32a and 32b via the shaft 31, and the rotation of the shaft 33 is transmitted to the power generation device via a speed increasing mechanism (not shown), thereby generating power generated by wind power.

  A cam 15 is disposed in the vicinity of the surface of the wind turbine rotating shaft 13, and a cam shaft 16 that is eccentric and vertically disposed in the cam 15 is rotatably supported by a bearing 17, and the cam shaft 16 is an axis of the wind turbine rotating shaft 13. Extending in the radial direction. A rotating shaft 18 is provided at the upper end of the cam shaft 16 perpendicular to the cam shaft 16, and a base 19 a of the blade 19 is connected to the rotating shaft 18 so as to be rotatable. Accordingly, the blade 19 can rotate about the cam shaft 16 and the cam shaft and can rotate about the rotation shaft 18.

  The rotation shaft 18 is provided with a pin at the upper end of the cam shaft 16 in a direction perpendicular to the elliptical long side A of the cam 15 (see FIG. 2). FIG. 1 shows a state in which the elliptical long side A of the cam 15 is parallel to the windmill rotating shaft 13. In this state, the rotating shaft 18 is perpendicular to the paper surface, and the blade 19 is centered on the rotating shaft 18. As shown in the figure, it is possible to rotate in a direction that falls on the surface of the windmill rotating shaft 13.

  As shown in FIG. 2, the outer periphery of the cam 15 is pressed by a first spring 22 having one end fixed to the fixed portion 20 and the other end fixed to the movable portion 21 supported by the slide bearing. In other words, in the absence of wind, as indicated by the broken line, the wind receiving surface of the blade 19 is in a substantially appropriate vertical state with respect to the wind turbine rotating shaft 13, and the wind receiving amount of the wind turbine is maximized. At this time, the first spring 22 is not pushed and the elastic force is minimized while the elliptical short side B of the cam 15 is parallel to the wind turbine rotating shaft 13. When the wind is strong, the vane 19 is supported by the bearing 17 so that the cam shaft 16 is rotatable. Therefore, the vane 19 is rotated, the cam shaft 16 is rotated, and the cam 15 is indicated by a solid line in the figure. The first spring 22 is compressed.

  In a certain strong wind state, as indicated by a solid line in the figure, the wind receiving surface of the blade 19 is substantially parallel to the wind turbine rotating shaft 13 and the wind receiving amount of the wind turbine is minimized. At this time, the elliptical long side of the cam 15 is in a state parallel to the wind turbine rotating shaft 13, the first spring 22 is most compressed, and the elastic force is maximized. As shown in FIG. 1, the rotation shaft 18 becomes perpendicular to the paper surface, and when the wind force further increases, the blades 19 can rotate around the rotation shaft 18 in a direction that falls on the surface of the windmill rotation shaft 13.

  A movable ring 25 is mounted between the blade portion of the blade 19 and the base portion 19a. The movable ring 25 includes a shaft 25a, and one end of an arm 26 is rotatably connected to the shaft 25a. Is rotatably connected to a shaft 27a provided in the movable portion 27 supported by the slide bearing of the second spring 28. Since the movable ring 25 is connected to the arm 26, the movable ring 25 is maintained at the same position even if the blade 19 rotates as the cam shaft 16 rotates. Therefore, the blade 19 cannot rotate around the rotation shaft 18 at an angle where the rotation shaft 18 is not perpendicular to the windmill rotation shaft 13.

  In a state where the elliptical long side of the cam 15 is parallel to the windmill rotating shaft 13, the rotating shaft 18 provided at the upper end portion of the camshaft 16 is perpendicular to the windmill rotating shaft 13, and the blade 19 is connected to the first spring via the arm 26. It can rotate against the elastic force of 28. That is, when the blade 19 rotates around the rotation shaft 18 in the direction of the arrow in the figure, the arm 26 moves the movable portion 27 to the right side in the figure, and therefore, the second spring 28 is compressed and the elastic force of the spring is increased. This acts in a direction that prevents rotation of the blade 19 around the rotation axis 18.

  FIG. 3 is a front view of the wind power generator shown in FIG. The wind power generator of the present invention preferably has wide and short blades. As a result, it is small and has a small installation area and a wide wind receiving area. Electric power can be generated from a slight wind of about 0.5 m / s, and a high power generation output can be obtained even in low winds. And it corresponds to the two-stage wind force of the angle adjustment mechanism around the cam shaft 16 of the blade 19 by the cam 15 and the first spring 22 and the angle adjustment mechanism around the rotation axis 18 of the blade 19 by the arm 26 and the second spring 28. With the automatic rotation control of the blades, even if the wind force fluctuates from light wind to typhoon class strong wind, it is possible to operate in a state where the torque is almost constant, to obtain a substantially constant stable power output, and typhoon class strong wind The damage can be prevented even underneath.

  When the wind direction changes, the blades 19 can rotate about the cam shaft 16 and the rotation shaft 18 against the spring force, and the upper end of the pole 11 is supported by the rotary bearing 35, Therefore, the direction of the wind turbine rotating shaft 13 is automatically adjusted to be parallel to the wind direction. As a result, the windmill always faces the wind direction and is operated at the maximum efficiency point with respect to the wind direction.

  Next, an operation example of this wind power generator will be described. First, since the wind force received by the blades 19 is extremely small in the windless state, the first spring 22 is in the most extended state, as shown by the broken line in FIG. 2, and the cam 15 has an elliptical short side B parallel to the windmill rotating shaft 13. Thus, the wind receiving surface of the blade 19 is perpendicular to the wind turbine rotating shaft 13. When the wind force increases, the blade 19 rotates around the cam shaft 16 against the spring force of the first spring 22 by the cam 15 because the cam shaft 16 is rotatably supported by the bearing 17. Then, the equivalent wind receiving area of the blade 19 is reduced, and the rotation angle around the cam shaft 16 of the blade 19 is automatically adjusted so that the wind force of the received wind and the spring force of the first spring are balanced.

  The spring force of the first spring 22 is a wind speed of about 10 m / s, and the position where the elliptical long side A of the cam 15 is substantially parallel to the wind turbine rotating shaft 13, that is, the wind receiving surface of the blade 19 is substantially parallel to the wind direction. It is preferable to set the position (appropriate angle). As a result, the rotational angle of the blade 19 around the cam shaft 16 is automatically adjusted according to the wind force from a light wind of about 0.5 m / s to a strong wind of about 10 m / s. It rotates at a substantially constant torque, and a substantially constant power generation output is obtained.

  When the elliptical long side A of the cam 15 reaches a position parallel to the windmill rotating shaft 13, the pin of the rotating shaft 18 becomes perpendicular to the windmill rotating shaft 13, and the blade 19 can rotate around the rotating shaft 18. 26, the spring force of the second spring 28 can be applied to the rotation control of the blade 19 around the rotation axis 18 through the shaft 25a of the movable ring 25.

  The spring force of the second spring 28 is in the most extended state at a wind speed of about 10 m / s and is balanced with the wind force received by the blades 19 and is most compressed at the wind speed of about 50 m / s and is balanced with the wind force received by the blades 19. It is preferable to have a spring force. Thereby, at a wind speed of about 10 m / s, the blade 19 can rotate around the rotation shaft 18, but the blade 19 can be held in a vertical position with respect to the windmill rotation shaft 13 by the spring force of the second spring 28.

  When the wind speed is higher than about 10 m / s, the blade 19 receives the wind force and rotates around the rotation shaft 18 against the spring force of the second spring 28. When the blade 19 rotates around the rotation shaft 18, the equivalent wind receiving area is reduced, and the blade 19 is automatically adjusted to an angle at which the wind receiving wind force and the spring force of the second spring are balanced. Accordingly, in a region where the wind speed exceeds about 10 m / s and the wind speed is about 50 m / s, the blades 19 are inclined with respect to the windmill rotating shaft 13 so as to squeeze the umbrella corresponding to the wind force, and the windmill rotating shaft 13 is substantially the same. While rotating under a constant torque, a substantially constant power generation output can be obtained, and damage to the blades 19 can be prevented.

  The above example is for a windmill having a wide and short blade, but also for a windmill having a blade having a narrow width and a long radius, the two-stage blade rotation control of the present invention. Can be applied as well.

  Although one embodiment of the present invention has been described so far, it is needless to say that the present invention is not limited to the above-described embodiment, and may be implemented in various forms within the scope of the technical idea.

  The present invention provides a wind power generator that can always obtain a substantially constant and stable power output from light winds to strong winds, and can be used in the field of wind power generation.

Claims (4)

A windmill rotating shaft,
A camshaft provided with a cam disposed close to the outer peripheral surface of the windmill rotating shaft , and rotatably supported ;
A rotating shaft disposed at an upper end portion of the cam shaft and disposed in a direction perpendicular to the elliptical long side of the cam;
A blade having a base portion connected to an upper end portion of the camshaft so as to be rotatable with the camshaft around the camshaft and rotatable about the rotating shaft;
A first spring having a movable part that contacts the outer periphery of the cam;
A wind power generator comprising: a second spring having a movable part connected to the blade through an arm. The blade is rotatable around the cam shaft, and the blade is rotatable around the rotation shaft with an elliptical long side of the cam parallel to the wind turbine rotation shaft. Wind generator.   The blades rotate around the cam shaft at an angle corresponding to wind force, the rotation shaft is perpendicular to the windmill rotation shaft at a constant wind force, and the blades rotate around the rotation shaft with more wind force. The wind power generator according to claim 1.   4. The wind power generator according to claim 3, wherein the blade rotates around the cam shaft at a wind speed of 10 m / s or less, and the blade rotates around the rotation shaft when the wind force exceeds the wind speed.