JP4846059B1 - Wind turbine with open / close blades for wind power generation - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a windmill with opening and closing blades for wind power generation which can sharply improve rotation torque due to wind rather than the conventional and sharply enhancing efficiency of wind power generation. <P>SOLUTION: The windmill with the opening and closing blades includes fixed blades formed in a planarly substantially V shaped, and opening and closing blades arranged both side edge parts of the fixed blades respectively and rotatably supported by the fixed blades with them. In addition, the side edge parts of the opening and closing blades are provided with wind receiving parts projected in a direction of opening the opening and closing blades from the side edge part of the opening and closing blades in the wind receiving parts for receiving wind giving force closing the opening and closing blades. Furthermore, the windmill includes a connection arm arranged in the side of receiving wind giving force opening the opening and closing blade and connected not to mutually separate each opening and closing blade from a prescribed distance or more in the connection arm for mutually connecting each opening and closing blade arranged in both the side edge parts of the fixed blade or its neighboring part. <P>COPYRIGHT: (C)2012,JPO&amp;INPIT

Description

  The present invention relates to a windmill with open / close blades for wind power generation, and the windmill includes blades for increasing power generation efficiency in wind power generation.

  Conventionally, drag type vertical axis wind turbines such as paddle wind turbines and Savonius wind turbines are known as small wind turbines that are relatively easy to install. The paddle windmill is of a type that is turned by the wind and is also used in the Robinson anemometer that is used by halving the sphere used in the anemometer. A Savonius windmill is a type of a bucket (blade) that is generally cut into two cylinders, with a core rod attached to the center, and the wind passing between the two buckets. Is also used to increase efficiency.

  It is said that when the paddle windmill or Savonius windmill as described above is used as a windmill for wind power generation, it is easy to manufacture and can be installed at low cost. However, in the wind power generation apparatus using the paddle windmill or the Savonius windmill as described above, the biggest problem is that the rotational torque is low and the power generation efficiency is low.

  Therefore, for example, as shown in Patent Document 1, it has been proposed to use a windmill for wind power generation in which a portion closer to the outer side of the blade portion is bent in a substantially Z-shaped step shape to improve rotational torque. The effect was not enough. In addition, as shown in Patent Document 2, it has been proposed to use a wind turbine in which two buckets whose positions are shifted from each other as a multi-stage type with three upper and lower stages to level the rotational torque is used for wind power generation. The effect of increasing power generation efficiency by increasing wind power was not sufficient.

JP 2010-127190 A Japanese Patent Laid-Open No. 2005-54724

  The present invention has been made paying attention to the problems in the wind power generator using the drag type vertical axis wind turbine such as the paddle wind turbine and the Savonius wind turbine as described above, and by drastically changing the structure of the blades. An object of the present invention is to provide a wind turbine with open / close blades for wind power generation that can significantly improve the rotational torque due to wind and can greatly increase the efficiency of wind power generation compared with a conventional drag type vertical axis wind turbine. And

  A wind turbine with open / close blades for wind power generation for solving the problems of the present invention as described above is a vertical axis fixed on the ground and a plurality of arms extending in a horizontal direction from the vertical axis. A plurality of arms rotatably supported in the horizontal direction, fixed blades fixed to respective tip portions of the plurality of arms and having a horizontal cross-section formed in a substantially V shape, Opening and closing blades that are connected to the edge portions on both sides of the V-shaped fixed blade via hinges, respectively, and are supported so as to be horizontally rotatable with respect to the edge portions on both sides of the fixed blade; It is characterized by including.

  In the wind turbine with open / close blades for wind power generation according to the present invention, the side edge portion of the open / close blade is a wind receiving portion for receiving the wind that gives the closing force of the open / close blade, There may be provided a wind receiving portion protruding from the side edge portion in the direction in which the opening / closing blade opens.

  Further, in the wind turbine with open / close blades for wind power generation according to the present invention, the open / close blade is a connecting arm for connecting open / close blades respectively arranged on both side edges of the fixed blade or in the vicinity thereof. The open / close blades may be provided on a side receiving a wind that gives an opening force, and the open / close blades may be provided with connecting arms that connect the open / close blades so that they are not separated from each other by a predetermined distance or more.

  In the present invention, when the fixed blade 1 receives "wind in the direction of rotating the windmill", the opening and closing blades are also opened and receive the wind. The drag that generates the rotational force of the windmill is greatly increased. On the other hand, when the fixed blade 1 receives “wind in a direction not rotating the windmill (the direction opposite to the above)”, the open / close blade is rotated so as to be closed to a predetermined angle with respect to the fixed blade by wind force. Therefore, the wind resistance is decreased without increasing the wind resistance. Therefore, according to the present invention, it is possible to greatly improve the rotational force of the windmill caused by the wind, and to dramatically improve the power generation efficiency.

It is a perspective view which shows the blade | wing part of the windmill for wind power generation of Example 1 of this invention, and is a figure which shows the state which the opening-and-closing blade attached to the both-sides edge part (both ends) of a fixed blade | wing is closed to the predetermined angle. . The perspective view which shows the part of the blade | wing of the windmill for wind power generation of the present Example 1, and the figure which shows the state which the opening-and-closing blade attached to the both-sides edge part (both ends) of a fixed blade | wing is opened to the same angle as the said fixed blade | wing. It is. It is a top view which shows the windmill provided with the blade | wing shown in FIG. It is a side view which shows the windmill provided with the blade | wing shown in FIG. It is a top view which shows the windmill in Example 2 of this invention. It is a side view which shows the windmill in the present Example 2. It is a top view which shows the blade | wing attached to the windmill in Example 3 of this invention. It is a side view which shows the blade | wing attached to the windmill in the present Example 3. It is the schematic for demonstrating the connection arm with which the opening-and-closing blade of the windmill in Example 3 was equipped.

  Embodiment of this invention improves the structure of the blade | wing of the drag type | mold vertical axis windmill used for wind power generation. That is, in this embodiment, it is set as the structure which adds the opening / closing blade which can be opened and closed to the both-sides edge part (both ends) of the conventional fixed blade | wing. Details will be described with reference to the following examples.

  1 and 2 are perspective views showing blades 10 of a wind turbine for wind power generation (drag type vertical axis wind turbine) according to Embodiment 1 of the present invention, and FIG. 1 is attached to both side edges (both ends) of the fixed blade. FIG. 2 shows a state in which the opening and closing blades are closed to a predetermined angle, and FIG. 2 shows a state in which the opening and closing blades attached to both side edges (both ends) of the fixed blade are opened to a predetermined angle. FIG.

  1 and 2, reference numeral 1 denotes a fixed blade formed in a substantially V-shape (for example, a substantially V-shape having an opening angle of about 90 degrees) so as to receive wind from the direction of arrow α in the figure. Support plates fixed to the upper and lower sides of the fixed vane 1 for reinforcing and supporting the fixed vane 1, 3 are hinge portions (shown in the figure) at both edges (positions indicated by reference numeral 4) of the fixed vane 1. The opening and closing blades attached so as to be able to rotate and open to the fixed blade 1 by a predetermined angle in the direction of arrow β in the figure (for example, up to a range of about 180 degrees with respect to the fixed blade 1) Opening and closing blades 5 that can be closed in a reverse direction by a predetermined angle (for example, approximately 110 to 150 degrees, for example, to a range of approximately 130 degrees with respect to the fixed blades 1), 5 are fixed to the upper and lower sides of the opening and closing blade 3 in the figure. The opening and closing blades 3 are reinforced and supported The support plate 6 is provided on the side edge of each opening / closing blade 3 (the end opposite to the fixed blade 1) and is a wind receiving portion for receiving wind for closing the opening / closing blade 3. A wind receiving portion projecting from the side edge of the opening / closing blade 3 in a substantially arcuate plane in the opening direction of the opening / closing blade 3, and a pair of stoppers 7 are fixed to the fixed blade 1 and the other is fixed to the opening / closing blade 3. And a stopper (see FIG. 2) for preventing the opening and closing blade 3 from opening more than about 180 degrees with respect to the fixed blade 1 when receiving the wind and opening in the direction of arrow β in the figure. It is.

  Next, FIG. 3 is a plan view showing a windmill provided with the blades 10 shown in FIGS. 1 and 2, and FIG. 4 is a side view showing the windmill provided with the blades shown in FIGS. 3 and 4, 11 is a vertical axis fixed to a base (not shown) installed on the ground. Reference numeral 12 denotes a substantially cross-shaped arm 12 having four arm portions that are rotatably supported in a horizontal direction with respect to the vertical shaft 11 via a known bearing. As shown in FIGS. 3 and 4, the first embodiment has a windmill shown in FIGS. 1 and 2 at the respective ends of four arm portions of a substantially cross-shaped arm 12 that is rotatably supported with respect to the vertical shaft 11. Is a “4-blade, single-stage” windmill. In FIGS. 3 and 4, reference numeral 11a denotes a connecting portion for connecting a windmill and a generator (not shown). 3 and 4, for convenience of illustration, the illustration of the stopper 7 and the like described in FIGS. 1 and 2 is omitted.

  As shown in FIGS. 3 and 4, in the first embodiment, the blades 10 are arranged on both side edges of the plane substantially V-shaped fixed blade 1, and the open / close blade 3 is connected to the fixed blade 1. On the other hand, it has the structure arrange | positioned so that rotation is possible. Since the fixed blade 1 is substantially V-shaped in a plane, it receives wind coming toward the concave opening side to generate a rotational force, and on the other hand, it comes from the opposite direction (non-open convex The wind resistance is low. A windmill having a plurality of fixed blades 1 rotates using this wind power, and wind power generation is performed with this rotational force.

  As shown in FIGS. 3 and 4, the open / close blade 3 of the first embodiment is substantially V of the fixed blade 1 when receiving wind toward the side of the fixed blade 1 that is opened in a substantially V shape. It is opened so as to be on the extended line of the letter shape (so as to be opened to an angle of about 180 degrees with respect to the fixed blade 1), and acts as if the V-shaped fixed blade 1 is enlarged, and the windmill The drag that produces the rotational force of the motor is greatly increased. On the other hand, when the opening and closing blade 3 receives wind from a direction different from the above (wind that is not directed to the side of the fixed blade 1 that is opened in a substantially V shape), the fixed blade is caused by the wind force. For example, since it is rotated so as to be closed from about 120 degrees to 150 degrees (more desirably about 130 degrees) with respect to 1, the wind resistance is decreased without increasing the wind resistance. Therefore, according to the present Example 1, the rotational force of the windmill by a wind improves significantly and it becomes possible to improve electric power generation efficiency drastically. Table 1 below shows a comparison of the rotational force of the windmill caused by wind between the case of only the fixed blade 1 and the case of the first embodiment. As shown in Table 1, the wind force is 2.3 times increase.

  As described above, according to the first embodiment, the both side edges of the fixed blade 1 of each blade 10 constituting the drag type vertical axis wind turbine rotate in the horizontal direction with respect to the both side edges of the fixed blade 1. By adding an openable / closable blade 2 that can be opened and closed, the amount of wind from the direction in which the windmill rotates hits each blade 10, and the amount of wind from the direction in which the windmill does not rotate hits each blade 10 is Since it is not increased by closing the opening and closing blades 3, the rotational force of the wind turbine in response to wind is greatly improved compared to conventional drag type vertical axis wind turbines, and the power generation efficiency of wind power generation is dramatically improved. To improve.

  Next, a wind turbine for wind power generation according to Embodiment 2 of the present invention will be described with reference to FIGS. FIG. 5 is a plan view showing the windmill in the second embodiment, and FIG. 6 is a side view showing the windmill in the second embodiment. Since the basic configuration of the second embodiment is the same as that of the first embodiment, the following description will focus on the differences from the first embodiment. 5 and 6, the same reference numerals are given to the portions common to FIGS.

  In the second embodiment, as shown in FIGS. 5 and 6, in FIGS. 3 and 4, reference numeral 13 is supported so as to be able to rotate in the horizontal direction with respect to the vertical shaft 11 via a well-known bearing. An upper arm having an arm portion extending in three directions through an angle of 120 degrees. Reference numeral 14 is provided below the upper arm 13 in the figure with respect to the vertical shaft 11, and is supported so as to be rotatable in a horizontal direction with respect to the vertical shaft 11 via a well-known bearing. A lower arm having an arm portion extending in three directions through an angle of 120 degrees. As shown in FIGS. 5 and 6, the second embodiment is illustrated at the tips of the three arm portions of the upper arm 13 and the lower arm 14 that are rotatably supported with respect to the vertical shaft 11. It is a “three-blade / upper and lower two-stage” windmill in which the windmills 1 and 2 are installed.

  In general, the larger the number of blades and the number of upper and lower stages of the windmill, the larger the wind power, and the level of wind force fluctuations associated with rotation improves the power generation efficiency. Therefore, according to the second embodiment, it is possible to further improve the rotational force of the windmill and improve the power generation efficiency of the wind power generation as compared with the first embodiment.

  Next, a wind turbine for wind power generation according to Embodiment 3 of the present invention will be described with reference to FIGS. 7 is a plan view showing blades attached to the windmill in the third embodiment, FIG. 8 is a side view showing blades attached to the windmill in the third embodiment, and FIG. 9 is a connection provided for the blades in the third embodiment. It is the schematic for demonstrating an arm. Since the basic configuration of the third embodiment is the same as that of the first embodiment, the following description will focus on the differences from the first embodiment. 7 and 8, the same reference numerals are given to portions common to FIGS. 1 to 5.

  7 and 8, reference numeral 21 denotes a connecting arm for connecting the opening and closing blades 3 so as not to be separated from each other by a predetermined distance or more. Both end portions of the connecting arm 21 are supported by the side end portions on the inner side (wind receiving side) of the respective opening / closing blades 3 so as to be rotatable in the vertical direction shown in FIG. 7 and 8, 22 supports each end of the connecting arm 21 so that the central portion of the connecting arm 21 can turn and swing in the vertical direction of FIG. It is a hinge part. Reference numeral 24 denotes a hinge portion for supporting the opening / closing blade 3 so as to be rotatable with respect to the fixed blade 1 in the horizontal direction. 7, 8, and 9, 21 a is a left arm portion supported by the hinge portion 22 on the left side of FIG. 7 and 8 so as to be rotatable in the vertical direction of FIG. 8, and 21 b is the right side of FIG. The right arm portion 21c is supported by the hinge portion 22 so as to be pivotable in the vertical direction of FIG. 8, and the right end portion of the left arm portion 21a and the left end portion of the right arm portion 21b are shown in FIG. A connecting shaft 21d that is pivotably connected in the illustrated vertical direction is a stopper provided at the left end of the right arm 21b in FIG. 8, and the arm 21a and the arm 21b are shown in FIG. The arm portion 21a and the arm portion 21b are stopper portions for preventing the arm portion 21a and the arm portion 21b from opening more than approximately 180 degrees when rotated and opened in the direction of the arrow γ.

  In the third embodiment, when the open / close blade 3 is opened by receiving wind, the connecting arm 21 (the left arm portion 21a and the right arm portion 21b) is moved as shown in FIGS. It becomes the state extended in the direction. On the other hand, when the opening / closing blade 3 is closed, the connecting arm 21 (the left arm portion 21a and the right arm portion 21b) moves as shown in FIG. 9 so that the connecting shaft 21c moves downward in FIG. It is in a state of being bent into a substantially V shape.

  As described above, the third embodiment includes the connecting arm 21 including the stopper portion 21d as described above. Therefore, even in the case of a strong wind such as a typhoon, the opening / closing blade 3 is provided with the stopper portion of the connecting arm 21. 21d, the open / close blades 3 are opened so as to be substantially parallel (approximately 180 degrees) to the fixed blade 1 as shown in FIGS. Opening beyond that state is prevented. Therefore, according to the third embodiment, it is possible to effectively prevent the opening / closing blade 3 from being excessively opened and damaged even in a strong wind such as a typhoon.

  7 and 8, reference numerals 25 and 26 denote positions where an electromagnet (not shown) is attached to the fixed blade 1. In the third embodiment, an electromagnet is disposed at a position indicated by reference numerals 25 and 26 of the fixed blade 1, and each open / close blade 3 is fixed to each electromagnet via a predetermined rod or the like, whereby each open / close The rotating state of the blades 3 or the wind force can be controlled by a control unit (not shown) such as a microcomputer. Therefore, in the third embodiment, when a strong wind such as a typhoon occurs, for example, the control unit generates a strong wind based on a signal from a sensor that detects the rotation state of each of the opening and closing blades 3 or a wind sensor. When the control unit controls the electromagnet, when a strong wind such as a typhoon occurs, the open / close blades 3 are forcibly closed by the force of the electromagnet, thereby It is possible to prevent the blade 3 from being damaged. In the third embodiment, the connection arm 21 also has an action in which the weight of the connection arm 21 exerts a force in the direction of closing the opening / closing blade 3 in a light wind.

  The embodiments of the present invention have been described above. However, the present invention and the constituent elements constituting the present invention are limited to those described as the respective embodiments and the respective elements constituting the respective embodiments, respectively. Various modifications and changes are possible. For example, in the first embodiment, an example in which a four-blade, one-stage wind turbine is used, and in the second embodiment, a three-blade, two-stage wind turbine is used. However, the present invention is not limited thereto. Of course, various variations such as three-blade, three-stage, four-blade, and three-stage types are possible.

DESCRIPTION OF SYMBOLS 1 Fixed blade | wing 2,5 Support plate 3 Opening / closing blade | wing 6 Wind receiving part 7 Stopper 10,10a, 10b, 10c, 10d, 10e, 10f Windmill 11 Vertical axis | shaft 12 Arm 13 Upper stage arm 14 Lower stage arm 21 Connection arm 21a, 21b Arm part 21c, 24 Hinge part 21d Stopper part 25, 26 Arrangement position of electromagnet

Claims (3)

A windmill for wind power generation,
A fixed blade formed in a substantially V-shaped plane;
Opening and closing blades that are respectively arranged on both side edges of the fixed blades and are supported rotatably with respect to the fixed blades;
A wind turbine with open / close blades for wind power generation.   In Claim 1, It is a wind-receiving part for receiving the wind which gives the force which the said opening-and-closing blade closes in the side edge part of the said opening-and-closing blade, Comprising: In the direction which the said opening-and-closing blade opens from the side edge part of the said opening-and-closing blade A wind turbine with open / close blades for wind power generation, characterized in that a projecting wind receiving portion is provided. 3. The connection arm according to claim 1, wherein the opening and closing blades are connected to each other to connect the outer edge portions of the opening and closing blades to each other, and are disposed on a side of the opening and closing blades that receives a wind that gives the opening force. A wind turbine with open / close blades for wind power generation, comprising a connecting arm for connecting the open / close blades so that they are not separated from each other by a predetermined distance or more.

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