JP2007303337A - Composite windmill - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a composite windmill enhancing rotation startability of a multiple-stage blade vertical axis windmill which is slow in starting of rotation when wind speed is low. <P>SOLUTION: In the composite windmill 1, an upper part of a vertical main shaft 7 of the vertical axis windmill supported by a support frame 2 is projected above the support frame 2, a housing 13 of a horizontal axis windmill is disposed on an upper part of the support frame 2 to be horizontally rotatable, an end of a horizontal main shaft 14 of the horizontal axis windmill is connected to the upper part of the vertical main shaft 7 through a transmission means 12, and vertically-long blades 9 and propeller blades 15 are corotated. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a composite wind turbine, and more particularly, to a composite wind turbine configured to rotate together by connecting a horizontal main shaft of a horizontal axis wind turbine on a vertical main shaft of a vertical axis wind turbine.

Conventionally, the wind turbine efficiency of the vertical axis wind turbine is 35%, and the wind turbine efficiency of the horizontal axis wind turbine is 45%, and the wind turbine efficiencies are different from each other in configuration and operation. As the vertical axis wind turbine, a multistage impeller wind turbine as in Patent Document 1 is known.
JP 2005-188468 A

  Among the vertical axis wind turbines, the multi-stage impeller wind turbine is gradually accelerated when it starts to rotate and rotates at a high speed, but when the wind speed is weak, the rotation start is slow. An object of the present invention is to provide a compound wind turbine in which the rotational startability of the multistage blade vertical axis wind turbine is improved.

  The specific contents of the present invention are as follows.

  (1) The upper part of the vertical main shaft of the vertical axis wind turbine supported by the support frame is protruded above the support frame, and the housing of the horizontal axis wind turbine is disposed on the upper part of the support frame so as to be horizontally rotatable. One end of the horizontal main shaft of the horizontal axis wind turbine is connected to the upper portion of the vertical main shaft via a transmission means, and the vertical blade and the propeller rotate together.

  (2) The support frame is formed by assembling a plurality of shaft supports in a multi-stage manner on a plurality of support columns arranged around the vertical main shaft, and bearings are provided in the center of the plane of each shaft support. One vertical main shaft is rotatably disposed through the upper and lower bearings, and a vane arrangement section is formed between the pair of upper and lower bearings. The composite windmill described in (1), in which vertically long blades are provided and an upper end portion of the longitudinal main shaft projects upward from the support frame.

  (4) A plurality of shaft supports are assembled in multiple stages on a plurality of struts arranged around the vertical main shaft, and a support frame is formed. Each shaft support supports a bearing and penetrates the upper and lower bearings. One vertical main shaft is rotatably arranged, and a blade arrangement section is formed between a pair of upper and lower bearings, and a plurality of blade supports are arranged on the vertical main shaft for each blade arrangement section. The blade support is composed of a shaft portion, a support arm, and a ring edge, and vertically long blades are fixed to the upper and lower ring edges, and the longitudinal position of the chord length of the blade is fixed by a fixed body. .

  (5) The number of the blade arrangement sections is the number obtained by dividing the outer periphery of the rotating body by the chord length of the vertical blades, and the upper and lower phases of the vertical blades disposed in the upper and lower blade arrangement sections are The composite windmill described in (4), wherein the distance is equivalent to the chord length in the circumferential direction.

  The present invention has the following effects.

  (1) In the composite wind turbine according to the first aspect of the present invention, the horizontal axis wind turbine is disposed above the support frame of the vertical axis wind turbine, and the upper part of the vertical main axis and the horizontal main axis of the horizontal axis wind turbine are connected to each other. Since it is configured to co-rotate, the horizontal axis windmill with a fast start of rotation starts to rotate, leading to the rotation and starting the vertical main shaft of the vertical axis windmill. As a result, the vertical wind turbine that has started to rotate accelerates by obtaining wind.

(2) In the composite wind turbine according to the second aspect of the present invention, a plurality of blade arrangement sections are arranged in a multi-stage shape on the support frame body of the vertical axis wind turbine, and a vertical blade is arranged on one vertical main shaft. Since it is arranged for each blade arrangement section, the vertical main shaft rotates when wind is received by the vertically long blade, and a large shaft torque can be obtained because it is a multistage blade. When the horizontal axis wind turbine rotates and leads even at low wind speeds, the vertical axis wind turbine rotates and accelerates with lift due to the shape of the vertically long blades to obtain a large axial torque.

(3) In the compound wind turbine according to the third aspect of the present invention, the horizontal axis wind turbine is horizontally disposed on a support base disposed at the upper part of the support frame, and the upper part of the vertical main shaft and the horizontal axis wind turbine. Since one end of the horizontal main shaft is connected via a transmission means, the horizontal axis wind turbine can change its direction naturally depending on the wind direction, and the rotational force of the horizontal main shaft is transmitted to the vertical main shaft for co-rotation. Therefore, a strong shaft torque can be obtained.

  (4) In the composite wind turbine according to the fourth aspect of the present invention, the blade support disposed on the vertical main shaft includes a shaft portion, a support arm, and a ring edge, and the vertical blades are formed on the upper and lower ring edges. However, since the front and rear positions of the chord length of the blades are fixed by a fixed body, even if the chord length of the vertical blades is long, the vertical blades are firmly and securely fixed to the ring body.

  (5) In the composite wind turbine according to the fifth aspect of the present invention, the number of blade arrangement sections is the number obtained by dividing the outer periphery of the rotating body by the chord length of the vertical blades, and is disposed in the upper and lower blade arrangement sections. Since the vertical phase of the vertical blades is different in the circumferential direction by a distance corresponding to the chord length of the vertical blades, either one of the vertical blades always faces the wind flow from one direction. I am receiving wind power.

Examples of the present invention will be described. FIG. 1 is a front view of a composite wind turbine according to the present invention, FIG. 2 is a plan view of relevant parts, and FIG. 3 is an enlarged front view of relevant parts.
In the figure, the support frame body (2) of the composite wind turbine (1) has a plurality of shaft supports (4) arranged in a stepped manner on a plurality of support posts (3) arranged around the vertical main shaft (7). The bearings (5) are arranged in the center of the plane of each shaft support (4).

Specifically, the shaft support (4) is integrally formed of a rectangular outer frame (4a) and a plurality of middle frames (4b), and is formed at the center of the plane of the middle frame (4b). A bearing (5) is provided.
One vertical main shaft (7) is rotatably supported by communicating with the upper and lower bearings (5). A generator (8) is connected to the lower part of the vertical main shaft (7).

Between each of the upper and lower shaft supports (4) is a blade arrangement section (6), and for each blade arrangement section (6), the longitudinal long blade (9) passes through the blade support body (10) and the vertical main shaft. (7).
The vertically long blade (9) has an inclined portion (9a) that is inclined toward the main shaft (7) at the top and bottom tips.

The upper part of the vertical main shaft (7) protrudes above the support frame (2) and is supported by the support base (11) as shown in FIG. The support base (11) has a shaft portion (11b) formed on the leg portion (11a), and the longitudinal main shaft (7) is penetrated into the inner cavity of the shaft portion (11b) and protrudes upward and outward. . A transmission means (12) composed of a bevel gear is fixed to an upper end portion of the vertical main shaft (7).
In the rotating part between the support base (11) and the casing (13), the bearing is not shown.

The shaft portion (13a) of the windmill housing (13) is rotatably fitted on the outside of the shaft portion (11b) of the support base (11). The windmill housing (13) is long in the front and rear, and the horizontal main shaft (14) is rotatably mounted in the interior, and the rear portion of the horizontal main shaft (14) protrudes outside the rear end of the windmill housing (13), Propeller wings (15) are fixed.
The tip of the propeller blade (15) is inclined forward to form an inclined portion (15a). Reference numeral (16) denotes a rudder.

  A transmission means (12) made of a bevel gear is fixed to the tip of the horizontal main shaft (14) and engaged with the transmission means (12) at the upper end of the vertical main shaft (7). Along with the rotation of the horizontal main shaft (14), the vertical main shaft (7) is also configured to rotate together via the transmission means (12).

In the present invention configured as described above, when wind blows, the wind rudder (16) receives wind and the wind turbine casing (13) directs the propeller blade (15) to the leeward side, and the propeller blade (15) Rotates.
Along with this, the horizontal main shaft (14) rotates, and the rotational force is transmitted to the vertical main shaft (7) via the transmission means (12) to co-rotate. When the longitudinal main shaft (7) rotates, the longitudinal blades (9) also rotate. The wind is received by this, and the rotational speed is gradually accelerated by the lift due to the blade shape of the longitudinal blades (9).

That is, the propeller blade (15) has higher wind turbine efficiency and starts to rotate faster.
The vertical blades of the vertical wind turbine (9) are slow to start rotating and the wind turbine efficiency is lower than that of the propeller blade (15). Therefore, when the gear ratio of the transmission means (12) is changed and synchronized, the horizontal main shaft (14) and the vertical main shaft (7) are synchronized.

The wind speed is higher at a higher position from the ground. This means that the propeller blade (15) rotates faster and leads to the rotation of the vertical blade (9) whose rotation starts slowly.
When the rotation starts, the vertical wind turbine is accelerated and rotated at a high speed by the lift force inevitably generated from the airfoil shape of the vertically long blade (9).

  According to the wind tunnel experiment, the vertical blades (9) with the inclined part (9a) at the top and bottom are confirmed to have a 40% increase in wind turbine efficiency compared to the vertical blades of the straight blades. In the case of three-stage stacking, a wind turbine efficiency of 3 times plus Alpha is recognized.

  The vertical blade (9) has a wide chord length. Accordingly, the rotation start is slow, but when the rotation starts, the wind receiving area is large. In particular, the inclined portion (9a) of the vertically long blade (9) has a wind collecting action, and is combined with the width of the chord length to affect the rotational speed.

FIG. 4 is a front view of one blade arrangement section of the vertical axis wind turbine showing the second embodiment, and FIG. 5 is a plan view thereof. The same parts as those in the previous example are denoted by the same reference numerals and description thereof is omitted.
In Example 2, the blade support (10) includes a shaft portion (10a) fixed to the longitudinal main shaft (7), and a plurality of support arms (10b) projecting radially from the shaft portion (10a). And an annular body (10c) supported by the support arm (10b).

  A longitudinally long blade (9) is fixed to the circumferential surface of the ring body (10c) at the front and rear portions of the chord length by a fixed body (9b). In other words, the vertical blade (9) uses a wide blade with a chord length of 50% or more of the radius of rotation, so if only the front part is fixed, there is concern about stability and rigidity. Can be firmly fixed by fixing with a fixing body (9b).

  In the second embodiment, as shown in FIG. 4, a plurality of upper and lower blade supports (10) are arranged in one blade arrangement section (6) in the longitudinal main shaft (7), and a plurality of upper and lower blades are arranged. Long blades (9) were fixed to the support (10). The vertical blade (9) has a fixed body (9b) arranged on the side facing the main shaft (7) before and after the chord length, and the front and rear fixed bodies (9b) are fixed to the ring body (10c). Yes.

As a result, the vertically long blade (9) is fixed to the ring body (10c) of the upper and lower blade supports (10) at the upper and lower four positions by the fixed body (9b), so that the stability and rigidity are high. Are better. If necessary, the blade support (10) can have three stages, and the fixed body (9b) can also have three stages.
The fixed body (9b) may be one long in the front-rear direction or three in the front-rear direction depending on the chord length of the vertically long blade (9).

  In the upper and lower blade arrangement sections (6), the plane phases of the vertically long blades (9) disposed in the upper and lower blade arrangement sections (6) are arranged so as to differ by a distance corresponding to the chord length of the vertically long blade (9). . In FIG. 6, the plane phase of the vertically long blade (9) is different by about 45 degrees in the upper and lower sides.

As a result, the two blades are respectively arranged in the four-stage blade arrangement section (6). If the blade arrangement section (6) has five stages, the difference is 36 degrees. In that case, the chord length of the vertically long blades (9) can be narrowed so that the vertically long blades (9) do not overlap in plan view.
As a result, even in the wind flow from one direction, any of the upper and lower vertical blades (9) faces the wind flow, and the wind force can be used effectively.

FIG. 7 shows an embodiment in which the longitudinal blade (9) of the vertical axis wind turbine has one blade disposed in one blade arrangement section (6).
At the same level, one long vertical blade (9) can be rotated at a high speed by about 20%. In one blade arrangement section (6) with respect to the longitudinal main shaft (7), the blade support (10) is a two-forked support arm (10b) protruding radially from the shaft (10a). These are arranged in a plurality of stages.

The chord length of the vertical blade (9) is, for example, 30% of the rotation diameter, and the chord length is long. Therefore, the longitudinal blades (9 ) Is fixed vertically.
In the upper and lower blade arrangement sections (6), the vertically long blades (9) have different phases in the plane for each chord length equivalent distance of the vertically long blades (9).

  In this embodiment, the support arm (10b) is a plurality, and the edge (10c) is fixed to the tip of the support arm (10c) in the same manner as in all examples, so that the vertically long blade (9) can be fixed to the edge. It is. That is, by using the ring body (10c), the rotational balance of the longitudinal main shaft (7) can be stabilized even if the longitudinally long blade (9) is one.

  In addition, this invention is not limited to the said Example, A design change can be suitably performed according to the objective. For example, a centrifugal clutch, a clutch controlled by a controller, or the like can be interposed in the transmission means (12).

  Since rotation startability is excellent and a large shaft torque can be obtained, it can be used as a wind power generator that can be installed anywhere.

It is a front view of the compound windmill concerning the present invention. It is a top view of the compound windmill concerning the present invention. It is a front view which shows the relationship between the horizontal main axis | shaft in FIG. 1, and a vertical main axis | shaft. 6 is a front view of one blade arrangement section showing Example 2. FIG. It is a top view in FIG. It is a top view which shows the phase of a longitudinally long blade | wing. 6 is a plan view of one blade arrangement section showing Example 3. FIG.

Explanation of symbols

(1) Combined windmill
(2) Support frame
(3) Prop
(4) Shaft support
(4a) Outer frame
(4b) Middle pier
(5) Bearing
(6) Feather arrangement zone
(7) Vertical spindle
(8) Generator
(9) Long blade
(9a) Inclined part
(9b) Fixed body
(10) Blade support
(10a) Shaft
(10b) Support arm
(10c) Ring body
(11) Stand
(11a) Leg
(11b) Shaft
(12) Transmission means
(13) Windmill housing
(13a) Shaft
(14) Horizontal spindle
(15) Propeller wing
(15a) Inclined part
(16) Rudder

Claims (5)

The upper part of the vertical main shaft of the vertical axis wind turbine supported by the support frame protrudes above the support frame, and the housing of the horizontal axis wind turbine is disposed on the upper part of the support frame so as to be horizontally rotatable. One end of the horizontal main shaft of the horizontal-axis wind turbine is connected to the upper portion via a transmission means, and the vertical long blade and the propeller blade co-rotate. The support frame is formed by assembling a plurality of shaft supports in a multi-stage manner on a plurality of support posts disposed around the vertical main shaft, and a bearing is disposed at the center of the plane of each shaft support. One vertical main shaft is rotatably disposed through the upper and lower bearings, and a blade arrangement section is formed between the pair of upper and lower bearings, and the vertical main shaft is vertically long for each blade arrangement section. The composite wind turbine according to claim 1, wherein blades are disposed, and an upper end portion of the vertical main shaft protrudes upward from the support frame. The horizontal axis wind turbine is supported by a support base disposed on an upper portion of a support frame, and the support base has a shaft portion formed on a leg portion, and a shaft portion of a housing of the horizontal axis wind turbine is formed on the shaft portion. However, it is mounted so that it can rotate horizontally, the upper part of the vertical main shaft and one end of the horizontal main shaft of the horizontal axis wind turbine are connected via a transmission means, and the vertical main shaft and the horizontal main shaft are configured to rotate together. A combined wind turbine according to any one of claims 1.2. A plurality of shaft supports are assembled in multiple stages on a plurality of support posts arranged around the vertical main shaft, and a support frame is formed.A bearing is supported by each shaft support, penetrating the upper and lower bearings, One vertical main shaft is rotatably arranged, a blade arrangement section is configured between a pair of upper and lower bearings, and for each blade arrangement section, a plurality of blade supports are arranged on the vertical main shaft, The blade support is composed of a shaft portion, a support arm, and a ring edge, and vertically long blades are fixed to the upper and lower ring edges, and the front and rear positions of the chord length of the blade are fixed by a fixed body. Combined windmill. The number of blade arrangement sections is the number obtained by dividing the outer periphery of the rotating body by the chord length of the vertical blades, and the upper and lower phases of the vertical blades disposed in the upper and lower blade arrangement sections correspond to the chord length of the vertical blades. The combined wind turbine according to claim 4, wherein the distance is different in the circumferential direction by a distance of 5 mm.

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