JPWO2007108075A1 - Wind power generator - Google Patents

Abstract

A wind power generator comprising a rotating shaft body 5 rotatable around a central axis C, a blade 9 fixed to the rotating shaft body 5, and a power generation unit 3 that generates electricity by the rotation of the rotating shaft body 5. An upper support 12 that rotatably supports the rotary shaft 5 via an upper bearing portion 13 that is mounted on an upper portion of the outer peripheral surface of the rotary shaft 5, and a lower portion of the outer peripheral surface of the rotary shaft 5 A lower support 15 that rotatably supports the rotary shaft 5 via a lower bearing portion 16 that is mounted, and an upper / lower connection that connects the upper support 12 and the lower support 15 to form the frame structure 2 of the entire apparatus. And a body 11.

Description

  The present invention relates to a wind turbine generator including a vertical axis wind turbine.

  Conventionally, a wind turbine generator including a vertical axis wind turbine is known. Unlike a horizontal axis wind turbine such as an airplane propeller, the vertical axis wind turbine has the advantage that it can generate power without any problems even if the wind direction changes slightly because the central axis of rotation is perpendicular to the wind direction. .

  For example, Japanese Laid-Open Patent Publication No. 2003-239847 discloses a wind power generation apparatus in which a vertical axis wind turbine is rotatably installed upright. This vertical axis windmill is a so-called Darius type windmill, and has a structure in which a plurality of arms are provided in a horizontal direction from a rotating shaft that is rotatable around a central axis, and a blade is connected and supported at the tip of the arm. Yes.

  By the way, the vertical axis wind turbine of the wind power generator has a structure in which the lower end of the rotating shaft body is only supported rotatably, so that if the rotational speed exceeds a certain level, resonance occurs in the rotating shaft body and thus the entire vertical axis wind turbine. However, the durability is significantly reduced. In addition, the resonance generated here is very uncomfortable for the residents in the surrounding area, so the operation must be stopped when the rotation speed of the vertical axis wind turbine is high, especially when installing in a residential area. .

  That is, the conventional wind power generation apparatus has problems such as low durability and abnormal noise.

  The present invention has been made to solve the above-described problems, and the rotating shaft body does not resonate even when the rotational speed is increased. Therefore, the durability is not lowered and abnormal noise is not caused. It aims at providing a wind power generator.

  The wind turbine generator according to the present invention includes a rotating shaft 5 that is rotatable about a central axis C, an arm 8 that extends from the outer peripheral surface of the rotating shaft 5, and a blade 9 that is fixed to the tip of the arm 8. A wind power generator including a power generation unit 3 that generates electricity in conjunction with the rotational movement of the rotary shaft body 5, and is mounted on an upper portion of the outer peripheral surface of the rotary shaft body 5 above the arm base end portion 8 a. The upper bearing portion 13, the upper support 12 that supports the rotary shaft body 5 so as to be rotatable around the central axis C via the upper bearing portion 13, and the arm base end portion 8 a on the outer peripheral surface of the rotary shaft body 5. A lower bearing portion 16 attached to the lower portion, a lower support body 15 that rotatably supports the rotary shaft body 5 around the central axis C via the lower bearing portion 16, an upper support body 12 and a lower support body 15 Are connected to form a frame structure 2 of the entire apparatus. It is characterized by comprising and.

  In the wind turbine generator having such a configuration, the lower support 15 supports the lower portion of the outer peripheral surface of the rotary shaft 5 via the lower bearing 16 so as to be rotatable. An upper portion of the outer peripheral surface of the rotary shaft body 5 is rotatably supported via the upper bearing portion 13 by the upper support body 12 connected to the body 15 with the upper and lower connection bodies 11 interposed therebetween. As a result, even if the blade 9 receives wind and the rotational speed of the rotating shaft body 5 increases, the rotating shaft body 5 is stably supported on both the upper and lower sides, so that resonance is prevented. Accordingly, it is possible to prevent a decrease in durability and occurrence of abnormal noise. Further, by fixing the frame structure 2 in a predetermined posture, the posture of the entire apparatus can be freely set.

  The upper bearing portion 13 and the lower bearing portion 16 are preferably composed of a pair of upper and lower bearings 10 and 14, respectively. By doing so, the fixed shaft body 4 can be supported more stably, and the load applied to each bearing 10, 14 is reduced and the durability is improved.

  In the wind turbine generator having such a configuration, the fixed shaft body 4 inserted into the cylindrical rotating shaft body 5, the outer peripheral surface of the fixed shaft body 4, and the inner periphery of the rotating shaft body 5 are further provided. It is preferable to include an inner bearing portion 7 that is interposed between the inner surface and the surface and that rotatably supports the rotating shaft body 5 on the fixed shaft body 4. Thereby, it becomes possible to stably support the cylindrical rotating shaft 5 not only from the outer peripheral surface side but also from the inner peripheral surface side. In addition, since the load applied to each of the bearing portions 7, 13, 16 can be small, the durability is further improved.

  Here, it is preferable that the inner bearing portion 7 is composed of a plurality of bearings 6 respectively installed at locations corresponding to the bearings 10 and 14 constituting the upper bearing portion 13 and the lower bearing portion 16. The location corresponding to each of the bearings 10 and 14 is, for example, a location having a front-back relationship with the rotary shaft body 5. By doing in this way, it becomes possible to support the rotating shaft body 5 which comprises a cylinder shape more stably from the outer peripheral surface side and the inner peripheral surface side. In addition, the load applied to each of the bearings 6, 10, and 14 forming these bearing portions 7, 13, and 16 is further reduced and the durability is improved.

  The upper support 12 is preferably provided with a cap-shaped outer cylinder 18 that covers the fixed shaft body 4 and the rotary shaft body 5 and supports the fixed shaft body 4 so as not to rotate. . By covering the outer cylinder 18 from above, foreign matter such as rain, snow, or dust is placed in the gap between the upper support 12 and the rotary shaft body 5 or in the gap between the rotary shaft body 5 and the fixed shaft body 4. At the same time as preventing the intrusion, the fixed shaft body 4 is supported by the cap-shaped outer cylinder 18, so that vibration generated in the fixed shaft body 4 can be effectively eliminated.

  The blade 9 is preferably a straight blade that receives wind and generates lift in the rotational direction. Thereby, it is possible to generate a large rotational force with a compact shape.

  It is also preferable to provide support leg portions 17 for mounting the frame structure 2 of the entire apparatus on a predetermined mounting surface S. The entire support device 17 can stably support the entire apparatus on the mounting surface S.

  Further, when the support leg 17 is provided, the power generation unit 3 is installed in each of the plurality of support legs 17, and the rotation motion of the rotary shaft body 5 is transmitted to each power generation unit 3 to be electrically It is preferable that a power transmission mechanism 19 for generating the power is provided. By doing in this way, while storing the some electric power generation part 3 compactly in the place which does not become obstructive, respectively, electricity can be efficiently generated using these electric power generation parts 3.

  Furthermore, in the wind turbine generator having such a configuration, it is preferable that the wind turbine generator further includes a connecting portion 30 for connecting another wind turbine generator in at least one of three directions orthogonal to each other. The three directions orthogonal to each other are, for example, up and down, left and right, and front and rear. By fixing the connecting portions 30 of the pair of wind power generators to be connected, a large number of wind power generators can be sequentially and simply connected in a compact manner.

  The connecting portion 30 is preferably a flange piece provided on one or both of the upper support 12 and the lower support 15. If it does in this way, a pair of wind power generators to be connected will connect the upper supports 12 and / or the lower supports 15 in the left-right direction and the front-rear direction, or one wind force to be connected. It becomes easy to connect the upper support 12 of the power generator and the lower support 15 of the other wind power generator in the vertical direction.

It is a partial fracture outline front view showing an example wind power generator in an embodiment of the present invention. It is a principal part enlarged view of the apparatus upper part in FIG. It is a principal part enlarged view of the apparatus lower part in FIG. It is a schematic side view which shows the case where the wind power generator same as the above is connected. It is a schematic plan view which shows the case where the wind power generator same as the above is connected.

  In order to describe the present invention in detail, it will be described with reference to the accompanying drawings. An example of a wind turbine generator according to an embodiment of the present invention is as shown in FIG. 1, and has a vertical axis windmill 1 and a rectangular shape that surrounds the vertical axis windmill 1 and is rotatably supported around a central axis C. A main body is formed by the frame structure 2 and the power generation unit 3 that transmits the rotational force of the vertical axis wind turbine 1 to generate electricity.

  In the vertical axis wind turbine 1, a cylindrical rotating shaft body 5 having at least one end opened with the vertical direction in the figure as an axial direction, and a columnar fixed shaft body 4 inserted into the rotating shaft body 5. And ring-shaped bearings 6 interposed at a plurality of positions above and below the outer peripheral surface of the fixed shaft body 4 and the inner peripheral surface of the rotary shaft body 5. The plurality of upper and lower bearings 6 form an inner bearing portion 7 that supports the rotating shaft body 5 on the fixed shaft body 4 so as to be rotatable around the central axis C. The central axis C is a vertical axis passing through the centers of the fixed shaft body 4 and the rotating shaft body 5. The bearing 6 has a ball interposed between an inner ring and an outer ring, and the inner ring side is fixed to the fixed shaft body 4 and the outer ring side is fixed to the rotating shaft body 5.

  From the outer peripheral surface of the rotating shaft body 5, a plurality of pairs of arms 8 that are vertically paired are extended in the horizontal direction, and a blade 9 extending in the vertical direction is fixed to the tip of each pair of arms 8. . The blade 9 is a so-called straight blade having a cross-sectional blade shape that generates lift in the rotational direction by receiving wind, but any other blade that generates force in the rotational direction by receiving wind. It may be a form. In the illustrated example, the rotary shaft 5 is divided into three parts in the axial direction (that is, in the vertical direction in the figure), and the arm base end portion 8a of each arm 8 is sandwiched between the divided rotary shafts 5. Accordingly, the rotary shaft body 5, the arm 8 and the blade 9 are integrally provided.

  As shown in FIG. 2, a plurality of (in this example, a pair of upper and lower) ring shapes are formed on the outer peripheral surface of the cylindrical rotating shaft 5 and further above the upper arm base end portion 8a. A bearing 10 is mounted, and the beam-like upper support 12 and the rotary shaft 5 constituting the upper end portion of the frame structure 2 are connected via the bearing 10 so as to be rotatable around the central axis C. . The rotary shaft body 5 is fitted into a through hole provided in the center of the upper support 12 and is interposed between the outer peripheral surface of the rotary shaft 5 and the inner peripheral surface of the through hole of the upper support 12. The pair of upper and lower bearings 10 has a structure that forms an upper bearing portion 13 that supports the upper end side portion of the rotary shaft body 5 so as to be rotatable about the central axis C with respect to the upper support body 12. The bearing 10 has a ball interposed between an inner ring and an outer ring, and the inner ring side is fixed to the rotating shaft 5 and the outer ring side is fixed to the upper support 12.

  A ring-shaped protruding wall 12a for mounting the upper bearing 10 is provided on the upper support 12 so as to protrude upward. A cap-shaped outer cylinder 18 is fixed to the upper end of the protruding wall 12a. is there. The outer cylinder 18 includes a circular top plate 18a and a side peripheral plate 18b extending downward from the peripheral edge of the top plate 18a. The lower end edge of the side peripheral plate 18b is the upper end of the protruding wall 12a. The structure is fixed to the edge. The outer cylinder 18 covers the upper portion of the fixed shaft body 4 and the rotary shaft body 5, and the upper end of the fixed shaft body 4 is fixed to the central portion of the lower surface of the top plate 18a with a screw or the like so as to be supported so as not to rotate. It has become. In the illustrated example, only the upper end of the fixed shaft body 4 is fixed, but the upper end and the lower end may be fixed so as not to rotate.

  Further, as shown in FIG. 3, the outer peripheral surface of the rotating shaft 5 and a portion further below the lower arm base end portion 8 a is provided with a plurality of upper and lower pairs (in this example, upper and lower pairs). ), And the lower support 15 and the rotary shaft 5 which form the lower end of the frame structure 2 are connected to each other so as to be rotatable around the central axis C. It is. The rotating shaft body 5 is fitted in a through hole provided in the center of the lower support body 15, and is interposed between the outer peripheral surface of the rotating shaft body 5 and the inner peripheral surface of the through hole of the lower support body 15. The pair of upper and lower bearings 14 has a structure that forms a lower bearing portion 16 that supports a lower end side portion of the rotary shaft body 5 so as to be rotatable about the central axis C with respect to the lower support body 15. The bearing 14 has a ball interposed between an inner ring and an outer ring. The inner ring side is fixed to the rotary shaft body 5 and the outer ring side is fixed to the lower support body 15.

  Here, the frame structure 2 has a pair of columnar shapes extending in the vertical direction between the horizontal end portion side of the upper support body 12 having a beam shape and the horizontal end portion side of the lower support body 15 having the same beam shape. The vertical axis wind turbine 1 is rotatably arranged in a rectangular space surrounded by the upper support body 12, the lower support body 15, and the upper and lower connection body 11. The wind from the outside directly hits the blade 9 of the vertical axis wind turbine 1.

  A pair of support legs 17 having a columnar shape are extended downward from the horizontal end of the lower support 15. A flat surface formed at the lower end of the support leg 17 is placed on and fixed to the predetermined mounting surface S, so that the frame structure 2 and thus the entire wind power generator can be stabilized on the predetermined mounting surface S. Can be fixed. In the illustrated example, the support leg 17 and the upper and lower coupling body 11 are provided separately on the left and right sides, but the support leg 17 and the upper and lower coupling body 11 are integrally formed to form a pair of left and right gate pillars. It doesn't matter.

  The support leg portion 17 is hollow, and the power generation unit 3 that converts the rotational force into electricity is accommodated in the storage space in each support leg portion 17. The power transmission mechanism 19 that transmits the rotational force to the power generation unit 3 includes a large pulley 20 that is fixed to a portion of the outer peripheral surface of the rotary shaft body 5 that protrudes downward from the lower support 15, and the power generation unit 3. The small pulley 22 fixed to the input shaft 21 and the large pulley 20 and the small pulleys 22 on both sides sandwiching the large pulley 20 to transmit the rotational force of the rotating shaft 5 to the pair of power generation units 3 in two hands. It is formed with a transmission belt 23 that is alternately hooked up and down. Although not shown, it is a matter of course that a power transmission means for sending the electricity generated by the power generation unit 3 to the outside and a power storage means for storing electricity are provided.

  Here, in the wind power generator of this example as described above, the upper bearing portion 13 and the lower bearing portion 16 are formed by a pair of upper and lower bearings 10 and 14, respectively, and the inner bearing portion 7 is replaced with each of the bearings. 10 and 14 are formed by four bearings 6 at the front and back positions, and each of the bearings 10 and 14 on the outer peripheral surface side and the bearings 6 on the inner peripheral surface side corresponding one-to-one with this. The rotating shaft body 5 is provided between the two.

  That is, in the rotary shaft body 5 of this example, which has a cylindrical shape and the blade 9 is fixed to the central portion in the axial direction via the arm 8, the upper portion is higher than the central portion where the blade 9 is provided. And a pair of upper and lower bearings 10 mounted on the outer peripheral surface and a pair of upper and lower bearings 6 mounted on the inner peripheral surface thereof are rotatably supported from the outer peripheral surface side and the inner peripheral surface side, and the blade 9 The outer peripheral surface and the inner peripheral surface are also provided by a pair of upper and lower bearings 14 mounted on the outer peripheral surface and a pair of upper and lower bearings 6 mounted on the inner peripheral surface of the lower portion of the central portion provided with The structure is supported rotatably from the side.

  As described above, the rotary shaft body 5 is clamped from both the outer peripheral surface side and the inner peripheral surface side around the central axis C by the bearings 6, 10, and 14 at the respective locations at both the upper end portion and the lower end portion. By being supported rotatably, the rotating shaft 5 is stably supported. Moreover, the bearings 6, 10, and 14 are respectively arranged on the outer peripheral surface side of the upper end side portion of the rotating shaft 5, on the inner peripheral surface side of the upper end side portion, on the outer peripheral surface side of the lower end side portion, and on the inner peripheral surface side of the lower end side portion. Since the upper and lower pairs are arranged at eight locations, the load applied to each bearing 6, 10, 14 is minimized and the durability is high.

  In the wind power generator of this example having the above-described configuration, the lower support 15 is stably installed on the mounting surface S by the pair of left and right support legs 17, and further on the lower support 15. The upper support 12 is stably supported via the upper and lower coupling bodies 11, and the bearings 6, 10, 14 are supported by the upper support 12 and the lower support 15 that are stably supported on the mounting surface S. It is the structure which supports the rotating shaft body 5 so that it can rotate stably through this. Therefore, even if the rotational speed of the rotating shaft body 5 is increased, the rotating shaft body 5 is reliably prevented from resonating and causing a decrease in durability and generation of abnormal noise. Moreover, since the upper end of the fixed shaft body 4 is fixed to the top plate 18a of the outer cylinder 18 having a cap shape, the vibration of the fixed shaft body 4 is effective at the high-strength side peripheral plate 18b portion of the outer cylinder 18. Will be erased.

  When the blade 9 receives wind and the rotary shaft 5 rotates, the large pulley 20 is driven to rotate about the central axis C in conjunction with the rotation, and this rotational force is transmitted through the transmission belt 23 to the left and right support legs. By being transmitted to the small pulley 22 in the part 17, the input shaft 21 of the power generation part 3 installed in each support leg part 17 is rotated to generate electric power.

  In addition, in this example, although it is set as the biaxial structure which penetrated the fixed shaft body 4 in the rotating shaft body 5, even if it is the structure which extracted the fixed shaft body 4 from the rotating shaft body 5, the rotating shaft body 5 is It can rotate around the central axis C without any problem. In the case of this uniaxial structure, the rotating shaft body 5 is supported at its upper end side portion by a pair of bearings 10 constituting the upper bearing portion 13 so as to be rotatable from the outer peripheral side, and its lower end side portion is supported at the lower bearing portion 16. Thus, the rotating shaft body 5 is reliably prevented from resonating even when the rotational speed is increased.

  Next, with respect to the configuration for sequentially connecting the wind power generators in three directions orthogonal to each other such as up and down, left and right, and front and rear, as shown in FIG. This will be described with reference to FIG. The illustrated example is a case where wind power generators are connected in the front-rear direction. FIG. 4 shows a state when viewed from the side, and FIG. 5 shows a state when viewed from above. The vertical axis wind turbine 1 included in each wind turbine generator is simply indicated by a one-dot chain line.

  In this example, flange-like connecting portions 30 are provided on the upper support 12 and the lower support 15 respectively, and the corresponding connecting portions 30 of the two wind power generators to be connected are directly or It is configured to be connected via a predetermined intermediate connector 31. Specifically, as the connecting part 30 in the front / rear direction, front / rear connecting flange pieces 30a (not shown in FIG. 1) are provided at both ends of the upper support 12 and the lower support 15 in the front / rear direction. The front and rear connecting flange pieces 30 a of the upper support 12 and the front and rear connecting flange pieces 30 a of the lower support 15 are fixed to each other via a beam-like intermediate connector 31. It is like that.

  Further, as the connecting portion 30 in the left-right direction, left and right connecting flange pieces 30b (not shown in FIG. 4) are similarly provided at both left and right ends of the upper support 12 and the lower support 15. Although not connected in the illustrated example, when connecting left and right, the left and right connecting flange pieces 30b of the upper support 12 in the left and right wind power generators and the left and right facing of the lower support 15 are opposed to each other. What is necessary is just to adhere the flange pieces 30b for connection directly or indirectly.

  Further, as upper and lower connecting portions 30, upper and lower connecting flange pieces 30 c (not shown in FIG. 5) are respectively provided at the upper end of the upper support 12 and the lower ends of the support leg portions 17 of the lower support 15. It is provided. Although not connected in the illustrated example, when connecting up and down, the upper and lower connecting flange pieces 30c provided on the upper support 12 of the lower air volume power generation device and the lower wind power generation device are provided. The upper and lower connecting flange piece 30c provided at the lower end of the support leg 17 of the support 15 may be directly or indirectly fixed.

  By providing each connecting portion 30 in the frame structure 2, a large number of wind power generators can be freely connected in the front-rear, left-right, and up-and-down directions to form a three-dimensionally diverse group of wind power generators. It is possible to form.

  The connecting portion 30 may be provided with at least one of the front and rear, left and right, and upper and lower connecting flange pieces 30a, 30b, and 30c. Further, the front and rear connecting flange pieces 30 a and the left and right connecting flange pieces 30 b may be provided only on one of the upper support 12 and the lower support 15.

  Further, the installation posture of the wind power generation apparatus of this example is not limited to the illustrated example, and the frame structure 2 of the entire apparatus formed by the upper support 12, the lower support 15, and the upper and lower coupling bodies 11 is appropriately fixed. If it is fixed to a predetermined posture by means, it can be installed in an arbitrary posture such as a posture in which the illustrated example is turned upside down or a posture in which it is tilted sideways. For example, in the case where the entire apparatus is installed in a posture in which it is tilted sideways, it is not necessary to provide the support leg portion 17 in the illustrated example. In this case, the power generation unit 3 is installed at an appropriate location other than the support leg 17.

  The vertical direction used in the text is a descriptive name with the one end side of the central axis C as the upper side and the other end side as the lower side. The vertical direction used in the text means the horizontal direction.

Since it is apparent that a wide variety of embodiments can be constructed without departing from the spirit and scope of the invention as described above, the invention is not limited to the specific embodiments except as defined in the appended claims. It is not restricted.

[0008]
By transmitting to the small pulleys 22 in the supporting leg portions 17, the input shaft 21 of the power generation unit 3 installed in each supporting leg portion 17 is rotated to generate electric power.
[0034]
Next, with respect to the configuration for sequentially connecting the wind power generators in three directions orthogonal to each other such as up and down, left and right, and front and rear, as shown in FIG. This will be described with reference to FIG. The illustrated example is a case where wind power generators are connected in the front-rear direction. FIG. 4 shows a state when viewed from the side, and FIG. 5 shows a state when viewed from above. The vertical axis wind turbine 1 included in each wind turbine generator is simply indicated by a one-dot chain line.
[0035]
In this example, flange-like connecting portions 30 are provided on the upper support 12 and the lower support 15 respectively, and the corresponding connecting portions 30 of the two wind power generators to be connected are directly or It is configured to be connected via a predetermined intermediate connector 31. Specifically, as the connecting part 30 in the front / rear direction, front / rear connecting flange pieces 30a (not shown in FIG. 1) are provided at both ends of the upper support 12 and the lower support 15 in the front / rear direction. The front and rear connecting flange pieces 30 a of the upper support 12 and the front and rear connecting flange pieces 30 a of the lower support 15 are fixed to each other via a beam-like intermediate connector 31. It is like that.
[0036]
Further, as the connecting portion 30 in the left-right direction, left and right connecting flange pieces 30b (not shown in FIG. 4) are similarly provided at both left and right ends of the upper support 12 and the lower support 15. Although not connected in the illustrated example, when connecting left and right, the left and right connecting flange pieces 30b of the upper support 12 in the left and right wind power generators and the left and right facing of the lower support 15 are opposed to each other. Bonding flange pieces 30b directly or indirectly

[0002]
An upper bearing portion 13 mounted on an upper portion of the outer peripheral surface of the outer peripheral surface of the cylindrical rotating shaft body 5 with respect to the arm base end portion 8a, and the rotating shaft body 5 via the upper bearing portion 13 as a central axis. An upper support 12 that is rotatably supported around C, a lower bearing portion 16 that is attached to a lower portion of the outer peripheral surface of the rotary shaft body 5 than the arm base end portion 8 a, and the lower bearing portion 16. A lower support 15 that rotatably supports the shaft body 5 around the central axis C, an upper and lower connection body 11 that connects the upper support 12 and the lower support 15 to form the frame structure 2 of the entire apparatus, and a rotation shaft A fixed shaft body 4 inserted into the body 5, and interposed between the outer peripheral surface of the fixed shaft body 4 and the inner peripheral surface of the rotary shaft body 5, and the rotary shaft body 5 is rotatable to the fixed shaft body 4. Rotating motion of the rotating shaft body 5 is transmitted to the inner bearing portion 7 to be supported by the plurality of power generating portions 3. And a power transmission mechanism 19 for generating electricity, and the power transmission mechanism 19 is fixed to the rotary shaft body side pulley 20 fixed to the rotary shaft body 5 and the input shaft 21 of each power generation unit 3. The power generation unit side pulley 22 and a transmission belt 23 that is hooked and locked between the rotary shaft body side pulley 20 and each power generation unit side pulley 22 are characterized by being formed.
[0008]
In the wind turbine generator having such a configuration, the lower portion of the outer peripheral surface of the cylindrical rotating shaft 5 is rotatably supported by the lower support 15 via the lower bearing portion 16. The upper portion of the outer peripheral surface of the rotating shaft body 5 is rotatably supported by the upper support 12 via the upper bearing portion 13, and the inner peripheral surface of the rotating shaft body 5 is fixed to the fixed shaft via the inner bearing portion 7. The body 4 is rotatably supported. As a result, the cylindrical rotary shaft 5 can be stably supported by the fixed shaft 4 not only from the outer peripheral surface side but also from the inner peripheral surface side. Even if the number of rotations of the body 5 is increased, the rotation shaft body 5 is stably supported, so that resonance is prevented. Accordingly, it is possible to generate electric power with the plurality of power generation units 3 while preventing the deterioration of durability and the generation of abnormal noise. Further, by fixing the frame structure 2 in a predetermined posture, the posture of the entire apparatus can be freely set. In addition, since the load applied to each of the bearing portions 7, 13, 16 can be small, the durability is improved.
[0009]
It is also preferable that a plurality of support legs 17 for mounting the frame structure 2 of the entire apparatus on a predetermined mounting surface S are provided, and the power generation unit 3 is installed in each support leg 17. It is. The entire apparatus can be stably supported on the mounting surface S by the support legs 17, and the plurality of power generation units 3 can be stored compactly in places that do not interfere with each other. Can be used to efficiently generate electricity.
[0010]
The upper bearing portion 13 and the lower bearing portion 16 are preferably composed of a pair of upper and lower bearings 10 and 14, respectively. By doing so, the fixed shaft body 4 can be supported more stably, and the load applied to each bearing 10, 14 is reduced and the durability is improved.
[0011]
Here, the inner bearing portion 7 includes a plurality of bearings 6 respectively installed at locations corresponding to the bearings 10 and 14 constituting the upper bearing portion 13 and the lower bearing portion 16.

[0003]
It is suitable that it consists of. The location corresponding to each of the bearings 10 and 14 is, for example, a location having a front-back relationship with the rotary shaft body 5. By doing in this way, it becomes possible to support the rotating shaft body 5 which comprises a cylinder shape more stably from the outer peripheral surface side and the inner peripheral surface side. In addition, the load applied to each of the bearings 6, 10, and 14 forming these bearing portions 7, 13, and 16 is further reduced and the durability is improved.
[0012]
The upper support 12 is preferably provided with a cap-shaped outer cylinder 18 that covers the fixed shaft body 4 and the rotary shaft body 5 and supports the fixed shaft body 4 so as not to rotate. . By covering the outer cylinder 18 from above, foreign matter such as rain, snow, or dust is placed in the gap between the upper support 12 and the rotary shaft body 5 or in the gap between the rotary shaft body 5 and the fixed shaft body 4. At the same time as preventing the intrusion, the fixed shaft body 4 is supported by the cap-shaped outer cylinder 18, so that vibration generated in the fixed shaft body 4 can be effectively eliminated.
[0013]
The blade 9 is preferably a straight blade that receives wind and generates lift in the rotational direction. Thereby, it is possible to generate a large rotational force with a compact shape.
[0016]
Furthermore, in the wind turbine generator having such a configuration, it is preferable that the wind turbine generator further includes a connecting portion 30 for connecting another wind turbine generator in at least one of three directions orthogonal to each other. The three directions orthogonal to each other are, for example, up and down, left and right, and front and rear. By fixing the connecting portions 30 of the pair of wind power generators to be connected, a large number of wind power generators can be sequentially and simply connected in a compact manner.

Claims (10)

A rotating shaft body that can rotate around the central axis, an arm that extends from the outer peripheral surface of the rotating shaft body, a blade that is fixed to the tip of the arm, and electricity generated in conjunction with the rotational movement of the rotating shaft body A wind power generation apparatus comprising a power generation unit, an upper bearing portion mounted on an upper portion of the outer peripheral surface of the rotary shaft body than an arm base end portion, and the rotation shaft body around the central axis via the upper bearing portion An upper support that is rotatably supported on the rotary shaft, a lower bearing portion that is mounted on a lower portion of the outer peripheral surface of the rotary shaft body, and a rotary shaft body around the central axis via the lower bearing portion. A wind power generator comprising: a lower support that is rotatably supported; and an upper and lower connecting body that connects the upper support and the lower support to form a frame structure of the entire apparatus. The wind turbine generator according to claim 1, wherein each of the upper bearing portion and the lower bearing portion includes a pair of upper and lower bearings. A fixed shaft body inserted through the cylindrical rotary shaft body, and interposed between the outer peripheral surface of the fixed shaft body and the inner peripheral surface of the rotary shaft body, and the rotary shaft body is rotatable with respect to the fixed shaft body The wind turbine generator according to claim 1, further comprising an inner bearing portion to be supported. The wind turbine generator according to claim 3, wherein the inner bearing portion is composed of a plurality of bearings respectively installed at locations corresponding to the bearings constituting the upper bearing portion and the lower bearing portion. 5. The upper support body includes a cap-shaped outer cylinder that covers the fixed shaft body and the rotary shaft body and supports the fixed shaft body in a non-rotatable manner. The wind power generator described. The wind power generator according to any one of claims 1 to 5, wherein the blade is a straight blade that receives wind and generates lift in a rotation direction. The wind power generator according to any one of claims 1 to 6, further comprising support legs for mounting the frame structure of the entire apparatus on a predetermined mounting surface. 8. The power generation unit is installed in each of a plurality of support legs, and further includes a power transmission mechanism that generates electricity by transmitting the rotational motion of the rotating shaft body to each power generation unit. The wind power generator described in 1. The wind power generator according to any one of claims 1 to 8, further comprising a connecting portion for connecting another wind power generator in at least one of three directions orthogonal to each other. The wind power generator according to claim 9, wherein the connecting portion is a flange piece provided on one or both of the upper support and the lower support.

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