JP2012041861A - Wind turbine device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance rotation performance by allowing blade bodies to efficiently receive wind on either of a windward side and a leeward side, in a wind turbine device of vertical shaft type which is installed to a power generating system, a heat exchange system, or the like to collect wind power energy.SOLUTION: Blade bodies 1 for receiving wind are radially attached to a vertical shaft 3 with support arms 2 and part of the blade bodies 1 is elastically deformed upon receiving wind. The blade bodies 1 each comprise a head 11 without elastic deformation and a tail 14 to be elastically deformed. The head 11 is U-shaped in the cross section such that the rotation direction side is closed and the reverse direction side in the rotation direction is opened, and is fixed to the support arm 2. The tail 14 is made of a plate material which has a base end fixed in the U-shaped cross section of the head 11 and a tip projected in a free state from the head 11, and is a thin flat plate having elasticity.

Description

  The present invention belongs to a technical field related to a vertical axis type windmill device that is installed in a power generation system, a heat exchange system, or the like and collects wind energy.

  In recent years, vertical axis wind turbine apparatuses have been frequently used in place of horizontal axis wind turbine apparatuses because of evaluations such as the rotational characteristics at the time of light wind and the necessity of direction control for the wind direction.

  In a vertical axis type windmill device, normally, blade bodies that receive wind are radially attached to a vertical axis (rotary axis) by a support arm. Therefore, the blades receive wind from the opposite direction at the windward and leeward positions with respect to the vertical axis. For this reason, in order to obtain high rotational performance, it is necessary to design the blade body so that it can receive wind efficiently on both the windward side and the leeward side.

  Conventionally, as a vertical axis type windmill device, for example, the one described in Patent Document 1 is known.

  Patent Document 1 describes a windmill device in which a blade body that receives wind is radially attached to a vertical axis by a support arm, and a part of the blade body receives the wind and is elastically deformed.

  The windmill device according to Patent Document 1 prevents damage to the blade body during a strong wind by causing a part of the blade body to receive wind and elastically deform.

JP 2004-60506 A

  In the wind turbine device according to Patent Document 1, the elastic deformation of the blade body only prevents the blade body from being damaged, and does not allow the wind to be received efficiently on either the windward side or the leeward side. There is a problem that the rotational performance is low.

  The present invention has been made in consideration of such problems, and is a windmill device with improved rotational performance so that the blades can receive wind efficiently both on the windward side and the leeward side. The issue is to provide.

  In order to solve the above-described problems, the wind turbine apparatus according to the present invention employs means described in each of the claims.

  That is, in the wind turbine apparatus in which the blade body that receives the wind is radially attached to the vertical axis by the support arm, and a part of the blade body is elastically deformed by receiving the wind, It consists of a tail part that is elastically deformed, and the head part is formed in a U-shaped section that is closed on the rotation direction side and opened on the opposite direction side of the rotation direction, and is fixed to the support arm. It is characterized in that it is made of a flat and thin elastic plate material that is fixed inside and protruded from the head in a free state.

  In this means, the tail portion of the blade body made of a flat and thin elastic plate is fixed to the inside of the U-shaped head portion of the blade body and protruded in a free state so that the blade receives wind. The body tail is elastically deformed in the opposite direction on the windward side and leeward side, resulting in a deformation pattern like fish migration, and restoration from the elastic deformation on the windward and leeward side of the tail of the wing. The force is added to the rotational force.

  According to a second aspect of the present invention, in the wind turbine apparatus according to the first aspect, the head of the blade body is bent with a thin plate material, and the base end of the tail portion of the blade body is fixed inside the U-shaped section of the head. The core member is fixed to a core member of the block body, and the core member is provided with an allowable space that allows elastic deformation of the tail portion.

  In this means, the tail is fixed to the core member of the block body fixed inside the head of the blade body which is bent and reduced in weight by a thin plate material, and elastic deformation of the tail is allowed to the core member. By providing the permissible space, the tail portion is securely fixed, and the elastic deformation is smoothly performed without causing unnecessary friction.

  According to a third aspect of the present invention, in the wind turbine apparatus of the second aspect, the core member is provided with a stopper for restricting the elastic deformation limit of the tail portion of the blade body.

  In this means, the core member is provided with a stopper, so that deformation beyond the elasticity of the tail of the blade body is prevented.

  According to a fourth aspect of the present invention, in the wind turbine apparatus according to the second or third aspect, the core member is formed of a sound absorbing material.

  In this means, the core member is formed of a sound absorbing material, so that an abnormal noise generated from the tail portion of the fixed blade body is attenuated.

  The windmill device according to the present invention is configured such that a tail portion of a blade body made of a flat and thin elastic plate member is fixed to the inside of a U-shaped head portion of the blade body and protruded in a free state. The tail of the wing body is elastically deformed in the same direction in the opposite direction on the windward and leeward side, resulting in deformation like fish migration, and elasticity on the windward and leeward side of the tail Since the restoring force from the deformation is applied to the rotational force, the blade body can receive wind efficiently on both the windward side and the leeward side, and the rotational performance is improved.

  Further, as claimed in claim 2, the tail portion is fixed to the core member of the block body fixed inside the head portion of the blade body which is bent and lightened by a thin plate material, and the elastic deformation of the tail portion is fixed to the core member. By providing the permissible space that allows the squeezing, the tail is securely fixed and the elastic deformation is smoothly performed without causing unnecessary friction, so that there is an effect that high durability performance can be obtained.

  Furthermore, as claimed in claim 3, since the core member is provided with a stopper, deformation beyond the elasticity of the tail portion of the blade body is prevented, so that the tail portion of the blade body is not damaged during a strong wind.

  Further, as claimed in claim 4, since the core member is formed of a sound absorbing material, abnormal noise generated from the tail portion of the fixed blade body is attenuated, so that an effect of obtaining silent rotational characteristics can be obtained. is there.

It is a perspective view of the form for carrying out the windmill device concerning the present invention. FIG. 2 is an enlarged cross-sectional view of a main part of FIG. 1. FIG. 2 is a simplified plan view for explaining the operation of FIG. 1. FIG. 2 is a simplified plan view for explaining the operation of FIG. 1. It is explanatory drawing which expand | deployed operation | movement of FIG. 3, FIG. 4 continuously on the straight line.

  EMBODIMENT OF THE INVENTION Hereinafter, the form for implementing the windmill apparatus which concerns on this invention is demonstrated based on drawing.

  In this embodiment, as shown in FIG. 1, a four-blade structure is shown.

  This configuration employs a vertical-type basic structure in which the blade body 1 that receives the wind W is radially attached to the vertical shaft 3 by the support arm 2.

  As shown in detail in FIG. 2, the blade body 1 includes a head portion 11, a seat 12, a core member 13, a tail portion 14, and a mounting bolt 15.

  The head portion 11 of the blade body 1 is formed into a U-shaped cross section that does not elastically deform by receiving a wind W by bending a thin plate material excellent in corrosion resistance and light weight such as an aluminum plate, The closed side of the U-shaped section is set to the rotational direction side, and the open side of the U-shaped section is set to the reverse direction side of the rotational direction. In addition, about the U-shaped cross section of the head 11, the shape like the wing cross section of the flying body is selected by varying the curvature on the outer peripheral side and the inner peripheral side.

  The seat 12 of the wing body 1 is formed in a U-shape with the same material as the head 11 and is fixed to the inside of the head 11 like a spacer (beam).

  The core member 13 of the blade body 1 is formed into a block body with a sound absorbing material such as a foaming synthetic resin material, and looks like a core material that fills the inside of the open side of the U-shaped section of the head 11 from the seat 12. It is fixed. In the center part of the core member 13, an allowable space 13 a made up of a hollow space is a little rear end (open side of the cross section of the head 11 in the U-shaped section) of the front end (the closed side of the cross section of the head 11). It is provided in the front-rear direction from the side and opened at the rear end. A stopper 13b is provided at the rear end of the core member 13 so as to protrude and be opposed to the allowable space 13a.

  The tail portion 14 of the blade body 1 is a single flat plate made of an elastic material similar to the head portion 11, and the base end portion is fixed to the center of the front end portion of the core member 13 inside the head portion 11. The tip portion protrudes from the head 11 in a free state through the allowable space 13a of the core member 13 and the center of the stopper 13b, and is elastically deformed by receiving the wind W.

  The mounting bolt 15 of the blade body 1 passes through the head portion 11, the seat 12, the core member 13, and the tail portion 14 to securely fix them. When the tail portion 14 is fixed to the head portion 11 via the seat 12 and the core member 13, the attachment and fixing of the tail portion 14 to the head portion 11 made of a thin plate material is strengthened. The mounting bolt 15 also serves to mount the support arm 2.

  Four support arms 2 are fixed to the vertical shaft 3 through a 90-degree angle, and are fixed to the inner peripheral surface of the head 11 of the blade body 1 by the mounting bolt 15 described above.

  The vertical shaft 3 is positioned at the center of the blade body 1 and the support arm 2 and serves as a rotation shaft.

  According to this embodiment, the blade body 1 receives the wind W on the open side of the U-shaped section of the head 11 and moves from the windward side to the leeward side, cuts the wind W on the closed side of the U-shaped section of the head 11, and winds down. It goes from the side to the windward side. As a result, the vertical shaft 3 is rotationally driven via the support arm 2. In particular, in this rotational drive, reception of the wind W on the open side of the U-shaped section of the head 11 improves the initial operation.

  In the rotation of the blade 1, the tip of the tail portion 14 is elastically deformed to the leeward side except when it is in the 3 o'clock direction and 9 o'clock direction (in the middle of the windward and leeward) in FIGS. 3 and 4 (see FIG. 3). . When moving from the windward side to the leeward side, the elastic deformation is on the inner peripheral side of rotation from 12 o'clock direction to 3 o'clock direction in FIGS. 3 and 4, and from 3 o'clock direction in FIGS. 3 and 4 to 6 o'clock. Up to the direction, elastic deformation is on the outer peripheral side of the rotation. Further, when going from the leeward side to the leeward side, the elastic deformation becomes the outer peripheral side of rotation from the 6 o'clock direction to the 9 o'clock direction in FIGS. 3 and 4, and the 9 o'clock direction in FIGS. 3 and 4 to the 12 o'clock direction. Until then, the elastic deformation is on the inner peripheral side of the rotation.

  As shown in FIG. 5, the elastic deformation of the tail portion 14 of the blade body 1 looks like a migration of fish that generates a forward driving force when deployed on a straight line. Therefore, the restoring force of the elastic deformation of the tail portion 14 of the blade body 1 is applied to the rotational force of the vertical shaft 3 described above. As a result, the rotation performance is improved.

  In the elastic deformation of the tail portion 14 of the blade body 1, an unnecessary space 13 a is provided in the core member 13 of the blade body 1, thereby avoiding unnecessary contact with the core member 13. For this reason, abrasion damage of the tail part 14 and the core member 13 is prevented, and smooth elastic deformation of the tail part 14 is ensured. Further, when the elastic deformation of the tail portion 14 of the blade body 1 increases, the tail portion 14 abuts against the stopper 13b of the core member 13 and deformation beyond the elasticity of the tail portion 14 is prevented. The tail 14 of the body 1 is not damaged.

  Furthermore, in this embodiment, since the core member 13 of the blade body 1 is made of a sound absorbing material, it is possible to attenuate abnormal noise such as a squeak noise generated at each portion including the tail portion 14 of the blade body 1. As a result, a rotational characteristic with quietness can be obtained.

  As described above, in addition to the illustrated embodiment, a two-blade structure, a three-blade structure, or a structure having five or more blades may be used.

DESCRIPTION OF SYMBOLS 1 Blade body 11 Head 13 Core member 14 Tail 2 Support arm 3 Vertical axis W Wind

Claims (4)

  In a wind turbine apparatus in which a blade body that receives wind is radially attached to a vertical axis by a support arm, and a part of the blade body is elastically deformed by receiving wind, the blade body includes a head that does not elastically deform and a tail that elastically deforms. The head is formed in a U-shaped cross-section with the rotation direction side closed and the rotation direction opposite side open, and fixed to the support arm, and the tail end is fixed to the inside of the head cross-section U-shape. A windmill device comprising: a flat plate-like elastic plate member protruding in a free state from the head.   2. The wind turbine apparatus according to claim 1, wherein the head portion of the blade body is bent with a thin plate material, and the tail portion of the blade body has a base end portion fixed inside the U-shaped cross section of the head body. The wind turbine apparatus is characterized in that the core member is provided with an allowable space that allows elastic deformation of the tail portion.   3. The windmill device according to claim 2, wherein the core member is provided with a stopper for restricting the elastic deformation limit of the tail portion.   The windmill device according to claim 2 or 3, wherein the core member is formed of a sound absorbing material.

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