JP2010223207A - Vertical type reaction wind turbine generator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem of expecting a reaction wind turbine for enhancing energy conversion efficiency with a simple constitution by following the wind direction, though production cost is never said to be low due to complication of a constitution of the wind turbine since the constituting number of part items is many, though recently developing a wind turbine of compounding a drag type and a lift type, since a shape of a vertical wing requires a high-degree technology to a certain degree, due to being low in the energy conversion efficiency by interposing force for rotating by receiving wind pressure and force for hindering rotation by receiving the wind pressure, in a vertical drag type wind turbine. <P>SOLUTION: The production cost is suppressed by using the simple and same thing in the number of part items for constituting these, by enabling force acting on a vertical wing surface to continuously and efficiently contribute to rotational energy of a wind turbine body, by having a mechanism of not changing its elevation angle even if the wind turbine rotates once by imparting the elevation angle to the vertical wing for the wind direction even in an area of operating the force of hindering the rotation by receiving the wind pressure, and also having a mechanism of following the wind direction even if the wind direction changes. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention utilizes the wind pressure acting on the vertical blade surface installed on the wind turbine body, and the vertical blade efficiently converts wind energy into electrical energy by the vertical blade rotating the reaction force generated on the vertical blade. Reactive wind turbine generator.

Currently, the mainstream wind turbine is a horizontal axis propeller type, and this type is mostly used in the United States. In Japan, there are vertical drag type Savonius type, cross flow type, vertical lift type Darrieus type, gyromill type, or composite type taking advantage of these advantages, and recently, horizontal type and vertical type using Magnus effect are developed. However, there has been little progress in wind turbine power generation that efficiently utilizes reaction force due to wind pressure.
JP2008-38794 JP 2008-175070 A

  Today's recoil-type wind turbines are large in size with guide vanes around the wind turbine body, and in the lift and composite types, there are advanced processing techniques, the structure of the wind turbine body is complicated, and the number of parts is large. There is a place that cannot be called a low-priced vertical windmill.

  In the current vertical reaction type windmill, only half of the wind pressure acting on the windmill rotation diameter is converted into energy with respect to the wind direction. Therefore, the present invention is to make it possible to obtain more rotational energy even in a region where the vertical blade has a streamlined point symmetry and can not contribute to rotational energy by rotating the vertical blade, It is an object of the present invention to provide a low price by using the same parts and making machining simple, reducing the weight of the windmill body and simplifying the production.

The present invention utilizes the wind pressure acting on the vertical blade surface installed in the wind turbine body, and the elevation angle of the vertical blade relative to the wind direction is determined by rotation of the wind turbine body (hereinafter referred to as vertical blade revolution) and rotation of the vertical blade. It is important that the elevation angle does not change with each revolution cycle, and this can be solved by satisfying the following conditions.
Condition 1. 1. The vertical blade section is point-symmetric with the rotation axis as the center of symmetry. 2. The ratio of the revolution period of the vertical wing to the rotation period of the vertical wing is 1: 1/2. The direction of revolution of the vertical wing is opposite to the direction of rotation of the vertical wing.

Hereinafter, the above condition will be described by taking one of the vertical blades with reference to FIG.
In FIG. 2, the wind is flowing from the left to the right, and the state before the vertical blade revolves and rotates is shown as a vertical blade elevation angle of 45 degrees together with the gear train. In order to rotate the vertical blade, there is a gear 9 at the center of revolution, and this gear is connected to a gear 13 for rotating the vertical blade through gear trains 10, 11, and 12. The rotation ratio between the gear 9 at the center of revolution and the rotation gear 13 of the vertical blade is set to 2 to 1 through the gear train. Here, the vertical wing surface (shaded area) that receives wind pressure is the back surface, but the cross section of the vertical wing has a point-symmetrical shape with the axis of rotation as the center of rotation. Will be the same. Also, the vertical blade revolution direction and the vertical blade rotation direction can be reversed by a combination of gear trains. When the vertical blade revolution is 1/4 turn (90 degrees), the vertical blade surface is perpendicular to the wind direction. When the maximum wind pressure is received and the wing rotates 3/4 (270 degrees), the vertical blade surface becomes horizontal with respect to the wind direction and receives the minimum wind pressure. The force acting on the vertical blade surface due to wind pressure assumes that there is no air viscosity, it works perpendicular to the blade plane, and the magnitude of the force is the amount of change in Sinθ (θ is the elevation angle), so vertical blade revolution 3/4 rotation Except near (270 degrees), a reaction force acting on the vertical blade surface can be obtained, and more rotational energy can be obtained.

  When the wind direction changes, in the self-control, the rudder at the tip of the inner shaft that passes through the hollow shaft of the wind turbine body follows the wind direction, and the vertical wing is moved through the central gear mounted on the inner shaft and the gear train. It can be solved by rotating the mounted rotation gear and performing self-correction.In the case of separate rudder installation, the control motor is rotated so that it can follow the direction of the wind direction by the electric command from the rudder, and it is attached to the inner shaft via the worm gear. The problem can be solved by rotating the rotating worm wheel and rotating the rotating gear mounted on the vertical blade through the central gear mounted on the inner shaft and the gear train.

Regarding the gear arrangement, the central gear mounted on the inner shaft has a gear rotation ratio of 2 between the central gear mounted on the center inner shaft of the wind turbine body and the rotating gear of the vertical blade installed on the wind turbine body. The pitch circle diameter including the gear train should be determined so that the rotation gear of the wing becomes 1, and the revolution direction and the rotation direction are reversed by making an odd arrangement including the rotation gear, the gear train, and the central gear. Can be. Further, by offsetting a part of the gear central axis of the gear train, the two vertical blades can be driven to rotate by the offset gear, and the number of gears can be reduced as compared with the case where they are arranged in series.
1 and 6

  For the gear arrangement mechanism, it is possible to use gears having ring-shaped external teeth and internal teeth, and can be used to install many vertical blades. FIG.

When two vertical blades are provided symmetrically to the windmill center axis and three are provided at a windmill center axis pitch of 120 °, the bevel gear can be used to further reduce the weight of the windmill body.
FIG.

  As described above, according to the present invention, the wind turbine main body has a double structure of the inner shaft and the hollow shaft, and by using a gear train, the wind turbine main body follows the wind direction, and the elevation angle with the vertical blade with respect to the wind direction is one revolution. Each time, the rotation angle becomes the same, and the rotation force can be continuously obtained, and this rotational force can be obtained as an efficient windmill output.

  The shape of the vertical wing does not need to be specially processed, and most of the parts constituting the wind turbine body are simple parts, so that the cost can be reduced.

By selecting a vertical wing whose vertical wing shape is increased in the width direction or lengthened in the vertical direction, it is possible to cope with regions having different annual average wind speeds.

It is a front view of the vertical reaction windmill generator of one entity of the present invention. It is explanatory drawing about the direction of the force which acts on the relationship between the rotation and rotation of a vertical wing | blade, the change of the vertical wing elevation angle with respect to a wind direction, and the vertical wing surface. A vertical blade rotation drive system using gears with ring-shaped external teeth and internal teeth is shown. A vertical blade rotation drive system using a bevel gear is shown. The installation position of the rudder which performs self-control correction | amendment with respect to a wind direction is shown. An embodiment of a gear arrangement in which a part of a gear train is offset to reduce the number of gears is shown.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows an embodiment of the present invention, and a windmill main body central axis is composed of a hollow shaft 1, a hollow shaft 2, and an inner shaft 3.

  The inner shaft 3 is controlled by a rudder that follows the wind direction so that the elevation angle of each vertical blade is always the same with respect to the wind direction.

  The rudder has a self-control system for small windmills and a separate installation system for medium and large windmills.

  In the self-control method, as shown in FIG. 7, a rudder is attached directly to the tip of the inner shaft 3, and self-control is performed.

  In another installation, the deviation of the wind direction is changed into an electric signal, the control motor 18 is driven, the worm gears 14 and 15 are rotated, and the gear 9 attached to the inner shaft 3 is rotated to correct the deviation. .

  The hollow shaft 1 supports a disk-shaped upper plate 6 that supports the upper end portion of the vertical blade rotation shaft 5, supports the lower end upper portion of the vertical blade rotation shaft 5, and supports the upper end portions of the gears 10, 11, and 12 of the gear train. The upper end of the hollow shaft 1 is supported via a bearing 31 by an arm 20 fixed to four ground struts.

  The hollow shaft 2 is a wind turbine output shaft that is directly connected to a disk-shaped lower plate 8 that supports the lower end of the vertical blade rotation shaft 5 and supports the lower ends of the gears 10, 11, and 12 of the gear train. A gear 16 for driving the machine is mounted, and a gear 17 mounted on the generator rotating shaft is rotated to generate power, and is supported via a bearing 32 by a structure fixed to the ground column.

  Since the disk-shaped middle plate 7 and the disk-shaped lower plate 8 of the windmill body are provided with bearings 25, 26, and 27 in the gear trains 10, 11, and 12, the respective gear shafts 22, 23, Both ends of 24 can be fixed, and the disk-shaped middle plate 7 and the disk-shaped lower plate 8 are connected to form a strength member of the windmill body.

  A mechanism in which the elevation angle of the vertical blade is always the same with respect to the wind direction will be described by taking one vertical blade shown in FIG. 2 as an example.

  Assuming that the wind flows from the left to the right without changing the direction, the gear 9 mounted on the windmill body central shaft inner shaft 3 may be considered to be fixed without rotating. The revolution direction of the vertical blade and the rotation direction of the vertical blade can be reversed by a combination of gear trains, and the rotation ratio of the gear 9 and the rotation gear 13 of the vertical blades through the gear train is determined by the former. Is 2 and the latter is 1, the vertical wing rotation is one rotation, the vertical wing rotation is ½ rotation, and the vertical wing blade cross section is a point symmetric shape with the axis of the vertical wing rotation as the center of symmetry. The elevation angle of the wing does not change, and the same can be said regardless of the position of the vertical wing installed on the vertical wing revolution orbit around the gear 9.

  As described above, by determining the vertical blade elevation angle installed on the wind turbine body with respect to the wind direction, the vertical blade revolution direction can be counterclockwise, stopped, or clockwise, so select the elevation angle that maximizes the revolution force. The same can be said when multiple vertical wings are used.

  If the wind direction changes, the inner shaft 3 rotates and corrects the deviation by the rudder, so that the vertical blade elevation angle can be continuously rotated without changing.

  The vertical reaction wind turbine generator of the present invention uses many gears, and noise generated from the gears is regarded as a problem, but the use of resin gears or contactless gears using strong magnets is used. This can be solved.

  In the case of strong winds such as typhoons, the wind turbine of the present invention depends on the shape of the vertical blades, but if the wind speed exceeds the specified wind speed, the rotational speed of the wind turbine will not increase. In the case of medium and large windmills with different installation methods, equipment damage due to centrifugal force may occur. In this case, control of the wind direction is removed, and the windmill is rotated by rotating it clockwise or counterclockwise with a control motor. The rotation speed can be lowered.

DESCRIPTION OF SYMBOLS 1 Windmill main body hollow shaft 2 Windmill main body hollow output shaft 3 Windmill main body inner shaft 4 Vertical wing 5 Vertical wing rotation axis 6 Windmill main body disk-shaped upper plate 7 Windmill main body disk-shaped middle plate 8 Windmill main body disk-shaped lower plate 9 Windmill main body center central axis The gear 10 mounted on the gear 11 The gear train 11 The gear train 12 The gear train 13 The vertical wheel rotation gear 14 The worm wheel gear 15 mounted on the center shaft of the wind turbine body 15 The worm gear 16 The output gear 17 The gear 18 mounted on the generator rotation shaft Motor 19 Generator 20 Arm 21 from support column Foundation frame 22 Gear train gear shaft 23 Gear train gear shaft 24 Gear train gear shaft 25 Gear mounted bearing 26 Gear mounted bearing 27 Gear mounted bearing 28 Vertical blade rotation bearing 29 Vertical blade rotation bearing Bearing 30 Vertical blade rotation bearing 31 Windmill main body upper bearing 32 Windmill main body lower bearing 33 Ring-shaped gear 34 having external teeth and internal teeth Ring-shaped teeth having external teeth and internal teeth Car side support plate 35 Bevel gear 36 mounted on the inner shaft of the windmill main body Bevel gear 37 for vertical wing rotation drive shaft 38 Vertical wing rotation drive shaft 38 Vertical wing rotation drive bevel gear 39 Vertical wing rotation bevel gear 40 Vertical wing rotation drive shaft Support plate 41 Vertical blade rotation drive shaft support plate 42 Rudder

Claims (5)

  The vertical axis of the vertical wind turbine has a double structure consisting of an inner shaft and a hollow shaft, and the inner shaft is fitted with a central gear for rotating the vertical blade so that the vertical blade elevation angle can follow the direction of the wind. In windmills, a rudder is attached directly to the upper end of the inner shaft, and the vertical blade elevation angle can be made to follow by a self-control system in which the inner shaft rotates in the direction of the wind. The worm wheel is mounted, the control motor rotates in the direction of the wind in response to an electrical command from the rudder of another installation method, the inner shaft central gear is rotated via the worm reducer, and the elevation angle of the vertical blade follows the wind direction A vertical reaction wind turbine generator characterized in that it can be used.   The hollow shaft has a hollow shaft 1 and a hollow shaft 2 and the hollow shaft 1 is directly connected to a disk-shaped upper plate that supports the upper end of the vertical blade shaft, and supports the upper lower end of the vertical blade shaft. The disk-shaped middle plate that supports the upper part of each gear shaft is directly connected, the hollow shaft part 2 supports the lower part of the lower end of the vertical blade shaft, and the disk-shaped lower plate that supports the lower part of each gear shaft of the gear train is directly connected. The vertical reaction wind turbine generator according to claim 1, wherein the hollow shaft 2 is used as a wind turbine output shaft.   When the wind turbine body makes one rotation and the vertical blade makes 1/2 rotation, the surface of the vertical blade that receives the wind pressure is the back surface before rotation, but the vertical blade cross-section has the same shape even if rotated 180 degrees. 2. A vertical reaction wind turbine generator according to claim 1, wherein the vertical reaction wind turbine generator is a point-symmetrical wing having a rotational axis of symmetric as a center of symmetry and is streamlined to prevent turbulent flow when the wind is cut.   In order not to attenuate the rotational force of the wind turbine body, the gear rotation ratio for rotating the vertical blades is 2 for the central gear mounted on the inner shaft including the gear train and 1 for the gear mounted on the vertical blade, and the wind turbine body rotates. The vertical reaction wind turbine generator according to claim 1 or 3, further comprising a gear train in which the direction of rotating and the direction of rotation of the vertical blades are opposite to each other.   The vertical reaction according to claim 1 or 2, wherein a gear is mounted on the output shaft of the hollow shaft 2 so that a plurality of generators can be installed, and a windmill starting drive motor can be installed if necessary. Windmill generator.

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