JP2005188468A - Multi-stage blade type vertical shaft wind mill - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a multi-stage blade type vertical shaft wind mill having blades reduced in the weight thereof and increased in air receiving area thereof. <P>SOLUTION: This multi-stage blade type vertical shaft wind mill 1 is formed by arranging vertical long blades 9 in a rotating body 8 having a vertical spindle 2. The vertical spindle 2 is supported by a plurality of bearings 4 arranged in upper and lower in a central part of a plurality of supports 3 arranged in the periphery. The blades 9 are arranged in multiple stages in upper and lower in relation to the vertical spindle 2. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a multistage blade vertical wind turbine, and more particularly, to a multistage blade vertical windmill arranged in multiple stages by changing the phase in the plane of the blade.

Conventionally, a wind turbine of a wind power generator uses a horizontal axis propeller type, and a vertical axis wind turbine having a wind power recovery rate of about 35% is not used because it is not practical.
Recently, small vertical wind turbines have been studied.

Since the vertical axis wind turbine has blades on the left and right of the main shaft, for example, when the left blade receives wind and rotates, the right blade receives a wind resistance. As a result, it is preferable to increase the height by reducing the chord length (front / rear width) of the blade, but if the height of the blade is increased, rigidity is required, and if the rigidity is increased, the weight increases and the rotation efficiency deteriorates. This causes a drawback. Further, the manufacturing cost is increased and the maintenance workability is deteriorated.
An object of the present invention is to provide a multistage blade longitudinal axis wind turbine that can further reduce the weight of the blade and increase the wind receiving area of the blade.

  In order to solve the above-described problems and achieve the object, the present invention reduces the height of the blades, reduces the size and weight, and arranges them in multiple stages on the vertical axis. The specific contents of the invention are as follows.

  (1) A wind turbine in which a longitudinal blade is disposed on a rotating body having a longitudinal main shaft, and a plurality of bearings are disposed vertically at the center of a plurality of support columns disposed on the outer periphery to support the longitudinal main shaft. The multistage blade longitudinal axis wind turbine in which the blades are arranged in a multistage shape with respect to the vertical main shaft.

  (2) The multistage vane vertical axis windmill described in (1) above, wherein a rotating body is disposed on the longitudinal main shaft between the upper and lower bearings.

  (3) The multistage vane vertical axis wind turbine described in (1), wherein a plurality of rotating bodies are disposed on the vertical main shaft between the upper and lower bearings.

  (4) The blades in each stage are configured as a single blade at the same level, and the planes of the planes are different from each other in the vertical direction. Windmill.

  (5) The multistage blade vertical axis wind turbine according to any one of (1) to (4), wherein the blades have different blade areas depending on vertical positions in the multistage.

  (6) The multistage blade vertical axis wind turbine according to any one of (1) to (5), wherein the blades are arranged in multiple stages on an upper portion of a high support.

  (7) The vertical main shaft is a multistage blade vertical axis wind turbine described in any one of (1) to (6), wherein a plurality of upper and lower main shafts are connected.

  (8) A longitudinal blade is disposed on a rotating body having a longitudinal main shaft, and the longitudinal main shaft is supported by a plurality of upper and lower bearings at the center of a plurality of support columns disposed on the outer periphery. Is a wind turbine arranged in multiple upper and lower stages, wherein the bearing, the shaft support, and the support are configured as a unit, and a multi-stage blade vertical wind turbine configured to be connected and assembled by stacking a plurality of units. .

  The present invention has the following effects.

(1) In the multistage blade vertical axis wind turbine according to the first aspect of the invention, the vertical main shaft is supported at the center of a plurality of support columns arranged on the outer periphery, and the blades are vertically multistage with respect to the vertical main shaft. Since it is disposed, the wind receiving area can be widened as a whole.
As the blades in each stage, blades having a low height can be used, so that it is suitable for maintaining rigidity and weight of the blades and the support arm, and improving the rotation efficiency.
In addition, by making the struts as high as 30-50 m, it is possible to use high-speed high-speed wind. As the blades become smaller and lighter, the manufacturing cost burden is reduced, and since the blades are small and light, they are excellent in workability and easy to maintain.

  (2) Since the multistage blade longitudinal wind turbine of the invention described in claim 2 is provided with one rotating body on the longitudinal main shaft penetrating between the upper and lower bearings, the wind pressure load applied to the blade Is shared by the upper and lower bearings of the vertical spindle.

  (3) Since the multistage blade longitudinal wind turbine of the invention described in claim 3 is provided with a plurality of rotating bodies on the vertical main shaft penetrating between the upper and lower bearings, the number of bearings is reduced. By doing so, the height of the entire column can be used effectively.

  (4) In the multistage blade vertical axis wind turbine according to the invention described in claim 4, the blades in each stage are configured as a single blade at the same level, and the phases in the plane are different from each other up and down. At the same level, it is difficult to receive the influence of the turbulence generated by the rotation and the wind resistance of the blade on the opposite side of the main shaft.

  (5) In the multistage blade vertical axis windmill according to the invention described in claim 5, since the blades have different blade areas in order from the bottom to the top depending on the vertical position in the multistage, the blades from the ground It can be adapted to the difference in wind speed caused by the difference in height.

  (6) In the multistage blade vertical axis wind turbine of the invention described in claim 6, since the blades are arranged in multiple stages on the upper part of the high support, high wind speed at a high position can be used.

  (7) Since the multistage blade vertical axis wind turbine of the invention described in claim 7 is configured such that a plurality of upper and lower vertical main shafts are connected, a transmission or the like can be interposed in the middle.

  (8) The multi-stage blade vertical axis wind turbine according to the invention described in claim 8 is configured so that the bearing, the shaft support, and the support are configured as a unit, and a plurality of units can be stacked and connected and assembled. The height can be adjusted accordingly.

  The blade height is lowered to reduce the size and weight, and the blades are arranged in multiple stages on the vertical main shaft.

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a front view of an essential part of a multistage blade vertical axis wind turbine according to the present invention, and FIG. 2 is a plan view of an essential part of the multistage blade vertical axis windmill in FIG.
In the figure, a multistage blade vertical axis wind turbine (1) has a longitudinal main shaft (2) supported vertically and rotatably on a case body (1a).
In the case body (1a), for example, a generator (dynamo) (not shown) is disposed so as to be able to generate power with the rotational force of the longitudinal main shaft (2).

In addition, a plurality of support columns (3) are erected at regular intervals at a predetermined radial position from the vertical main shaft (2), and an upper portion of the vertical main shaft (2) and an intermediate bearing (4) are connected to the shaft support (5). It is supported by.
Reference numeral (6) in the figure is a base, and (7) is a roof. A solar power generation panel (not shown) can be disposed on the roof (7).

  A plurality (2 in the figure) of rotating bodies (8) are arranged on the vertical main shaft (2) in the vertical direction. In the rotating body (8), a support arm (8b) is fixed to a shaft portion (8a) fixed to the vertical main shaft (2). The tip portions of the upper and lower support arms (8b) are set to face in opposite directions in the vertical direction.

  A vertically long blade (9) is fixed to the front end portion of each support arm (8b) with its left side faced in the direction of the longitudinal main axis (2) and a longitudinal intermediate portion. The transverse plane of the blade (9) is substantially fish-shaped, and a large bulge is formed at the left front edge, and an inclined portion (9a) inclined leftward is formed at the upper and lower portions of the blade (9). Has been.

  Between the support arm (8b) of the rotating body (8) and the left side surface of the blade (9), the blade support (10) for preventing the blade (9) from swinging is disposed in an inclined manner. Has been. The blade support (10) can be screwed, but the joint between the blade (9) and the support arm (8b) can be integrated by FRP molding.

  In FIG. 1, the wind direction and wind speed are different between the upper and lower stages. From this, naturally the wind force which hits the upper and lower blades (9) is different. In FIG. 1.2, when the lower A blade (9) is rotated by the south wind (wind indicated by arrow A), the longitudinal main shaft (2) is rotated.

  The upper B blade (9), which is rotated by the rotational force of the longitudinal main shaft (2), is subjected to wind resistance, but passes through that portion because the left side front edge of the blade (9) bulges. Since the wind speed becomes faster and negative pressure is generated, lift (rotational thrust) is generated, and self-running rotation occurs.

  When the upper B blade (9) moves to the left in FIG. 1 and rotates by wind, the lower A blade (9) rotates by wind even if it rotates to the right of the longitudinal main shaft (2). Rotates with the force that has been generated, and performs self-running rotation by lift (rotational thrust).

  Thus, in the same level stage in FIG. 1.2, since there is one blade (9), there is no blade that receives wind resistance on the opposite side across the longitudinal main shaft (2), so one blade (9) is rotated by being pushed by the wind, plus free-running rotation due to lift. Different blades (9) of different stages periodically repeat the same action, so that efficient wind recovery can be achieved.

In the same level stage, a balance body, an unbalance body, or another blade can be disposed on the opposite shaft portion (3a) of the blade (9) sandwiching the longitudinal main shaft (2).
If a plurality of rotating bodies (8) are disposed between the upper and lower bearings (4), the height of the support column (3) can be used effectively.

FIG. 3: is a principal part front view of the multistage blade | wing vertical axis | shaft wind turbine which shows 2nd Example. The same parts as those in the previous example are denoted by the same reference numerals and description thereof is omitted.
In the second embodiment, the blades (9) are arranged in three stages. As shown in FIG. 4, the position of the blade (9) on the plane is arranged at a position equally divided (every 120 degrees) on the rotating track.

In the multistage blade vertical axis wind turbine (1) of the second embodiment, each stage has the characteristics of one blade, and the plane has a balance of three blades.
For example, if the height of the blade (9) is 6 meters, the strength is increased and the weight is increased. Therefore, the strength of the support arm (8b) must be strengthened. Furthermore, the strength of the longitudinal main shaft (2) needs to be strengthened.

  However, if the wind receiving area of the blade (9) is the same by arranging the blades (9) in three stages, the height of one-third of the 6m blade can be 2 meters (when the string length is the same). Therefore, the rigidity may be adapted to that, and the support arm (8b) can also be reduced in weight. Furthermore, since the vertical main shaft (2) is also supported by a plurality of upper and lower bearings (4), a thin vertical main shaft (2) is sufficient.

FIG. 5: is a principal part front view of the multistage blade | wing vertical axis | shaft wind turbine which shows 3rd Example. The same parts as those in the previous example are denoted by the same reference numerals and description thereof is omitted.
The third embodiment is configured with four-stage blades. The plane phase of the upper and lower blades (9) is different every 90 degrees.

  The atmospheric pressure changes each time it rises from the ground. Therefore, the wind pressure and the wind speed also change due to a high level difference from the ground. Generally, the wind speed is higher in the sky. For this reason, a difference occurs in the wind speed received between the blade at a position 2 m above the ground and the blade at a position 8 m.

  Therefore, when the difference between the wind speeds received by the lower and uppermost blades is large, the rotation is driven by the upper wind speed in the initial stage. In this case, when the resistance of the lower blade becomes a burden, the vertical main shaft (2) may be twisted.

  In that case, the area of the blades (9) arranged from the lower stage to the upper stage can be successively reduced at a constant ratio. Alternatively, the length of the support arm (8b) of the rotating body (8) can be adjusted by making it shorter at the upper part than at the lower part. The blade support (10) can be horizontal as shown.

FIG. 6: is a principal part front view of the multistage blade | wing vertical axis | shaft wind turbine which shows 4th Example. The same parts as those in the previous example are denoted by the same reference numerals and description thereof is omitted.
In the fourth embodiment, the strut (3) is raised and the blade (9) is disposed only at a high position of the strut (3). In this fourth embodiment, for example, if the height of the support column (3) is 10 m, the vertical main shaft (2) is also 10 m, the case body (1a) is arranged on the ground, and the generator is arranged inside, Maintenance becomes easy.

  However, if the longitudinal main shaft (2) becomes longer, problems such as weight load and twisting may occur.Therefore, as shown in the figure, for example, a transmission (1b) is arranged in the middle and the vertical main shaft (2) is moved up and down. There can be more than one. This suppresses the diameter of the longitudinal main shaft (2) of the supporting portion of the blade (9) from being increased. In this configuration, the column (3) can be used for large-scale wind power generation such as 30 m, 50 m, and the like.

  Also, the blade (9) receives different wind speeds at the upper and lower stages at the high position of the support post (3) .Therefore, as a means other than reducing the upper blade from the lower stage, the rotating body (8 ), The torque on the longitudinal main shaft (2) can be adjusted by making the upper arm shorter than the lower arm. The longer the support arm (8b), the greater the shaft torque can be based on the lever principle.

FIG. 7 is a front view of an essential part showing a column and bearing unit (11) of a multistage blade vertical axis wind turbine showing a fourth embodiment, and FIG. 8 is a plan view thereof.
In this unit (11), the column (3) has a fixed length, and a plurality of columns (3), a shaft support (5), and a bearing (4) are set. As shown in the figure, the support column (3) has a fitting protrusion (3a) formed at the upper end, and a fitting recess (3b) into which the fitting protrusion (3a) is fitted at the lower end. Yes.

As shown in FIG. 8, the shaft support (5) has a base end fixing portion (5a) fixed to the bearing (4) at the base end portion, and is bolted to the bearing (4). A tip fixing portion (5b) is formed at the tip of the shaft support (5), and as shown in FIG. 7, the fitting protrusion (3a) and the fitting recess (3b) of the upper and lower support columns (3). And fixed so as to cover the connecting portion by fitting.
Thereby, the tip fixing portion (5b) of the shaft support (5) is used for fixing the shaft support (5) to the support column (3) and fixing and reinforcing the connecting portion of the upper and lower support columns (3). .

In this unit (11), it is selected whether one rotating body (8) or a plurality of rotating bodies (8) are arranged between the upper and lower bearings (4) depending on the height of the support (3). Further, when the column (3) is long, the bearing (4) and the shaft support (5) can be interposed in the middle of the column.
The support / bearing unit (11) configured as described above can be stacked, for example, in five stages, and further extended to the uppermost part of the support (3).

  The present invention is not limited to the above-described embodiments, and can be appropriately changed in design according to the purpose. In the unit (11), the vertical main shaft (2) can also be vertically connected by combining the short main shafts (2).

  Since the multistage blade vertical axis wind turbine of this invention can arrange | position a blade | wing in multistage, it can collect | recover wind power efficiently with a small blade | wing, can also utilize high-rise wind power, and is used for wind power generation be able to.

It is a principal part front view of the multistage blade | wing vertical axis | shaft wind turbine which shows 1st Example of this invention. It is a principal part top view in FIG. It is a principal part front view of the multistage blade | wing vertical axis | shaft wind turbine which shows 2nd Example of this invention. It is a principal part top view in FIG. It is a principal part front view of the multistage blade | wing vertical axis | shaft wind turbine which shows 3rd Example of this invention. It is a principal part front view of the multistage blade | wing vertical axis | shaft wind turbine which shows 4th Example of this invention. It is a principal part front view of the multistage blade | wing vertical axis | shaft wind turbine which shows 5th Example of this invention. It is a top view in FIG.

Explanation of symbols

(1) Multistage blade vertical axis windmill
(1a) Case body
(1b) Transmission
(2) Vertical spindle
(3) Prop
(3a) Mating protrusion
(3b) Mating recess
(4) Bearing
(5) Shaft support
(5a) Base end fixing part
(5b) Tip fixing part
(6) Base
(7) Roof
(8) Rotating body
(8a) Shaft
(8b) Support arm
(9) Feather
(9a) Inclined part
(10) Blade support
(11) Unit

Claims (8)

A wind turbine in which vertically long blades are disposed on a rotating body having a longitudinal main shaft, and a plurality of bearings are disposed vertically at the center of a plurality of support columns disposed on the outer periphery to support the longitudinal main shaft, A multistage blade vertical axis wind turbine characterized in that the blades are arranged in a multistage shape with respect to the vertical main shaft. The multi-stage blade vertical axis wind turbine according to claim 1, wherein a single rotating body is disposed between the upper and lower bearings on a vertical main shaft. The multistage blade vertical axis wind turbine according to claim 1, wherein a plurality of rotating bodies are disposed on the vertical main shaft between the upper and lower bearings. The multistage blade longitudinal wind turbine according to any one of claims 1 to 3, wherein the blades in each stage are configured as a single blade at the same level, and the phases of the planes thereof are different in the upper and lower sides. . The multistage blade vertical axis windmill according to any one of claims 1 to 4, wherein the blades have different blade areas depending on the vertical position of the multistage. The multistage blade longitudinal wind turbine according to any one of claims 1 to 5, wherein the blades are arranged in a multistage manner on an upper portion of a high support. The multi-blade longitudinal axis wind turbine according to any one of claims 1 to 6, wherein a plurality of the vertical main shafts are connected in the vertical direction. A rotary blade having a vertical main shaft is provided with a vertical blade, and the vertical main shaft is supported by a plurality of upper and lower bearings at the center of a plurality of support columns disposed on the outer periphery. A multi-stage wind turbine, wherein the bearing, the shaft support, and the support column are configured as a unit, and a plurality of units are stacked to be connected and assembled. Axial windmill.

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