JP2007107496A - Wind power generation device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a Savonius type wind power generation device which has Savonius wings attached on a rotating rotor shaft, is low cost and can be easily installed. <P>SOLUTION: A shaft hole of a predetermined length from a lower end is provided along a center axis in the rotor shaft 3, a hollow shaft outer rotor type generator 8 is attached to the lower end of the rotor shaft 3, and a bearing 9 is provided on a lower end part of the shaft hole. A vertically erect pole 2 or a column is fitted in the shaft hole from a pole hole 13 of a fixing frame 11 of the hollow shaft outer rotor type generator 8 and an upper end of the same is supported by the bearing 9. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a wind turbine generator equipped with a wind turbine that is rotated by wind power, and in particular, it can be installed using a vertically standing power pole to facilitate installation work and achieve a significant cost reduction. The present invention relates to a Savonius wind power generator and a cross-flow wind power generator.

  The wind power generator rotates when the wind turbine hits the wind turbine, and is generated by a power generation device that rotates using this rotation. By the way, in the wind turbine generator, since the rotational speed of the windmill is determined by the wind speed and the peripheral speed characteristics of the windmill shape, it decreases as the diameter of the windmill increases to increase the torque. An expensive gearbox is required between the two.

  There are horizontal axis wind turbines and vertical axis wind turbines for wind turbines, propeller type and sail wing types for horizontal axis wind turbines, and paddle type, Savonius type, Darius type, and cross flow type for vertical axis wind turbines. . The wind power generators targeted by the present invention are the Savonius type and the cross flow type, and the Savonius type wind power generator has a high starting torque but a low peripheral speed ratio of 0.8 to 1.0, compared to other systems. The efficiency of wind turbines is extremely low and the efficiency is low.

  A Savonius type windmill is generally composed of two semi-cylindrical blades, and a multistage type in which the windmills are vertically stacked is also known. The efficiency is only 10% at the maximum, but the torque in the low speed region is large, and unlike the propeller of the horizontal axis wind turbine, there is an advantage that it can rotate with respect to the wind from any direction.

  However, the size of the apparatus has to be increased as the output becomes higher, and on the other hand, the speed must be increased due to the reduction in the rotation with the increase of the rotation diameter. In addition, a rotor shaft serving as a rotating spindle of the windmill, a support frame that supports the windmill, a speed increasing device, and the like are required, and a predetermined strength must be ensured, resulting in an increase in total manufacturing cost. However, the power generation capacity commensurate with it is small and it is not balanced in cost. Therefore, in the Savonius-type wind power generators, small power generators of less than 500 W are currently mainstream.

  In the “Savonius type windmill” according to Japanese Patent Application Laid-Open No. 2004-60577, a pair of arc-shaped cross-section blades provided in the impeller can move from the eccentric position to the rotation center position. Therefore, the wind turbine is not damaged even under strong winds, and the power generation device can be protected.

  Japanese Patent Laid-Open No. 2002-317749 discloses a “Savonius type wind power generator” in which a generator is connected to a vertical shaft in which a plurality of blades are radially fixed, and these blades are fixed between upper and lower rotating plates fixed to the vertical shaft. In addition, air vent holes are formed in each blade, and projecting blades are provided on the outer periphery between the upper and lower rotating plates, and the projecting blades can adjust the vertical position and the angle of receiving wind between the upper and lower rotating plates.

Japanese Patent Laid-Open No. 11-62813 discloses a “Savonius-type windmill and a wind turbine generator using the Savonius-type windmill”, which can increase the efficiency of the Savonius-type windmill and generate high-output power. The Savonius type windmill is provided with a plurality of fixed blades installed so as to be directed outward from the fixed frame so that the wind outside the rotor blades is introduced into the rotor blades.
“Savonius type windmill” according to Japanese Patent Application Laid-Open No. 2004-60577 "Savonius type wind power generator" according to Japanese Patent Application Laid-Open No. 2002-317749 "Savonius type windmill and wind turbine generator using Savonius type windmill" according to Japanese Patent Application Laid-Open No. 11-62813

  As described above, there are various wind turbine generators using the Savonius type windmill, and the efficiency of the Savonius windmill is improved. The present invention provides a Savonius-type wind power generator that can be easily installed at low cost rather than improved efficiency. Moreover, the crossflow type wind power generator which shares a basic structure is provided.

  In the Savonius wind turbine of the Savonius wind power generator according to the present invention, a plurality of semi-cylindrical Savonius blades are attached to a rotor shaft, and each Savonius blade is disposed at an equal angle around the rotor shaft. One side end of the semi-cylindrical Savonius blade is attached with a small distance to the rotor shaft and a large distance to the other side end, so that it can be rotated by wind.

  The rotor shaft is formed with a shaft hole along the central axis, and a hollow shaft outer rotor generator is provided at the lower end. And the bearing is provided in the upper end part of the shaft hole. By the way, a utility pole or pole (pole) is fitted into the shaft hole, and a Savonius wind power generator is attached to the upper end of the utility pole. The rotor shaft is supported by a bearing provided at the upper end of the utility pole and a bearing of a hollow shaft outer rotor generator. Therefore, it can be easily mounted by fitting the rotor shaft to the upper end of the vertically standing power pole.

  Although the present invention is configured using a Savonius type windmill, a crossflow type windmill having a common basic structure may be used instead of the Savonius type windmill. Further, instead of the hollow shaft outer rotor generator, a hollow shaft inner rotor generator can be used. In this case, the utility pole or support column has a connecting structure that supports the outer ring portion that fits into the shaft hole of the hollow shaft inner rotor type generator but does not rotate, and the rotor shaft can be connected to the inner rotor to rotate. .

  The Savonius-type wind power generator of the present invention can be installed by fitting a power pole or column that stands vertically on the ground into a shaft hole provided in the rotor shaft, and the installation work becomes extremely simple. Therefore, a significantly cheaper Savonius wind power generator can be provided. Since the rotor shaft is supported by a bearing provided at the upper end of the utility pole and the bearing of the hollow shaft outer rotor generator, the Savonius blade can rotate together with the rotor shaft when the wind strikes it.

  Further, the Savonius wind power generator of the present invention uses a low-rotation generator, so that a speed increaser is not required, the manufacturing cost of the entire power generator is reduced, and 1 Kw to 10 Kw of power can be easily generated. Is possible, and its utility value is great

  FIG. 1 is a schematic view of a Savonius type wind power generator according to the present invention, in which 1 represents a Savonius type wind turbine and 2 represents a utility pole. The Savonius wind turbine 1 is provided with Savonius blades 4a, 4b, 5a, 5b, 6a, 6b around the rotor shaft 3, and rotates with the rotor shaft 3 if wind strikes these Savonius blades 4a, 4b,. I can do it.

  The Savonius blades 4 a and 4 b are smoothly curved in a semi-cylindrical shape, and one end 7 a thereof is fixed to the rotor shaft 3, and the other end 7 b is separated from the rotor shaft 3. Accordingly, the two Savonius blades 4a and 4b are mounted so as to be symmetrical with respect to the rotor shaft 3. Similarly, the Savonius blades 5a and 5b have a semi-cylindrical shape larger than the Savonius blades 4a and 4b, and one end 7a is attached to the rotor shaft 3 via an arm (not shown) extending from the rotor shaft 3. . Both the Savonius blades 5 a and 5 b are also symmetrical with respect to the rotor shaft 3.

  Further, the Savonius blades 6a and 6b are formed in a semi-cylindrical shape larger than the Savonius blades 5a and 5b, and are attached away from the rotor shaft 3. However, one side end 7 a is arranged at a distance close to the rotor shaft 3, and the other side end 7 b is arranged at a position far away from the rotor shaft 3. Both the Savonius blades 6 a and 6 b are axisymmetric with respect to the rotor shaft 3. The Savonius blades 6a and 6b are attached to the rotor shaft 3 via arms (not shown) as in the case of the Savonius blades 5a and 5b.

  A hollow shaft outer rotor generator 8 is provided at the lower end of the rotor shaft 3, and the hollow shaft outer rotor generator 8 can rotate with the rotor shaft 3. The fixed frame 11 of the hollow shaft outer rotor generator 8 is fixed to the utility pole 2 and supports the rotor shaft 3.

  By the way, the rotor shaft 3 is provided with a shaft hole along the central axis, and a bearing 9 is attached to the upper end portion of the shaft hole. Since the utility pole 2 is slightly smaller than the inner diameter of the shaft hole, it is inserted into the shaft hole, and its upper end is fitted and fixed to the bearing 9. On the other hand, the utility pole 3 is also fitted and positioned and fixed in the utility pole hole 13 provided in the cotter frame 11 of the hollow shaft outer rotor generator 8 provided at the lower end of the rotor shaft 3.

  FIG. 2 shows a Savonius wind power generator equipped with another embodiment of the Savonius wind turbine 1. The Savonius wind turbine 1 has three Savonius blades 10a, 10b, 10c attached to the rotor shaft 3 at equal intervals. If wind strikes each Savonius blade 10a, 10b, 10c, the rotor shaft 3 rotates in the direction of the arrow, and at the same time, the hollow shaft outer rotor generator 8 can generate power.

  FIG. 3 is an embodiment showing a low-speed rotating outer rotor generator according to the present invention. In the figure, reference numeral 11 denotes a fixed frame, and 12 denotes an annular rotor wheel. A bearing 14 is attached to the fixed frame 11, and the annular rotor wheel 12 is rotatably supported via the bearing 14. The fixed frame 11 is supported by the electric pole 2 being fitted in the central electric pole hole 13, and the annular rotor wheel 12 can be rotated around the electric pole 2 through the bearing 14.

  An annular stator 15 is fixed to the outer periphery of the fixed frame 11, and a winding coil 16 is wound around the outer periphery of the annular stator 15 and extending outward at equal intervals. The fixed frame 11 configured as described above is supported by a lower surface 18 placed on a pedestal 19 provided on the utility pole 2 and fixed to the utility pole pedestal 19 by screwing it into the screw holes 20, 20. Therefore, the fixed frame 11 and the stators 17, 17,... And the winding coils 16, 16,... Wound around the stators 17, 17,.

  On the other hand, the annular rotor wheel 12 forms a ring body, and a plurality of permanent magnets 22 are attached to the outer peripheral portion 21 at equal intervals. Of course, the adjacent magnets 22, 22... Are arranged so that the S pole and the N pole are alternately switched. The annular rotor wheel 12 includes an inner ring 23 that is directly supported by the bearing 14 and an outer ring 24 having the magnets 22, 22... The outer ring 24 is mounted on a pedestal 25 formed on the inner ring 23 and screwed. It is connected.

  An annular rotor wheel cover 26 is attached to the lower side of the ring-shaped annular rotor wheel 12 to close the space between the fixed frame 11 and a rotor cover 27 is attached to the upper side of the annular rotor wheel 12 to fix the fixed frame 11. Between the two. That is, the structure is such that dust and dust are prevented from entering the inside of the annular rotor wheel 12 incorporating the annular stator 15 and the bearing.

  On the other hand, cooling fins 28a, 28a,... Are formed on the outer ring 24 of the annular rotor wheel 12, and cooling fins 28b, 28b,. Therefore, the rotation of the annular rotor wheel 12 can suppress an increase in temperature based on heat generation by the cooling fins 28a, 28b.

  By the way, the number of magnets 22, 22,... Attached to the annular rotor wheel 12 is calculated by the planned power generation capacity and the planned input rotational speed, and the winding coils 16, 16,. The pole magnets 22 are opposed to each other with a slight gap between them.

  The rotor shaft coupling plate 29 fixed to the lower end of the rotor shaft 3 is mounted on the base 30 of the inner ring 23 that is rotatably supported by the bearing 14 and is screwed thereto. That is, if the rotor shaft 3 is connected to the annular rotor wheel 12 of the hollow shaft outer rotor generator 8, and the rotor shaft 3 rotates together with the Savonius wind turbine 1, the annular rotor wheel 12 rotates to generate power. I can do it.

The Example of the Savonius type wind power generator concerning the present invention. 4 shows another embodiment of the Savonius wind power generator according to the present invention. Internal structure of a hollow shaft outer rotor generator.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Savonius type windmill 2 Electric pole 3 Rotor shaft 4 Savonius wing 5 Savonius wing 6 Savonius wing 7 Side end 8 Hollow shaft outer rotor generator 9 Bearing
10 Savonius wing
11 Fixed frame
12 Annular rotor wheel
13 Telephone pole hole
14 Bearing
15 Annular stator
16 winding coil
17 theta
18 Bottom
19 Telephone pole base
20 Screw holes
21 Outer part
22 Permanent magnet
23 Inner ring
24 outer ring
25 pedestal
26 Annular rotor wheel cover
27 Rotor cover
28 Cooling fan
29 Rotor shaft connecting plate
30 pedestal

Claims (5)

In the Savonius wind power generator in which a Savonius blade is attached to a rotating rotor shaft, the rotor shaft is provided with a predetermined length from the lower end along the central axis, and a hollow shaft outer rotor is provided at the lower end of the rotor shaft. A type generator is installed, a bearing is provided at the upper end of the shaft hole, and a vertically standing power pole or support is fitted into the shaft hole from the power pole hole of the fixed frame of the hollow shaft outer rotor type generator, and the upper end is supported. The wind power generator characterized by having supported in. In the crossflow type wind power generator in which the crossflow blades are attached to the rotating rotor shaft, the rotor shaft is provided with a predetermined length from the lower end along the central axis, and a hollow shaft is provided at the lower end of the rotor shaft. Install the outer rotor generator, provide a bearing at the upper end of the shaft hole, and fit the vertical pole to the shaft hole from the electric pole hole of the fixed frame of the hollow shaft outer rotor generator to the shaft hole. A wind power generator characterized by supporting the shaft with a bearing. The fixed frame of the hollow shaft outer rotor type generator is mounted and fixed on a power pole pedestal provided on a power pole or support, and the rotor shaft connecting plate provided at the lower end of the rotor shaft is connected and fixed to an annular rotor wheel. The wind power generator according to claim 1 or 2. In the Savonius wind power generator in which a Savonius blade is attached to a rotating rotor shaft, the rotor shaft is provided with a predetermined length from the lower end along the central axis, and a hollow shaft inner rotor is provided at the lower end of the rotor shaft. A type generator is installed, a bearing is provided at the upper end of the shaft hole, and a vertically standing power pole or support is fitted into the shaft hole from the power pole hole of the fixed frame of the hollow shaft inner rotor type generator, and the upper end is supported. The wind power generator characterized by having supported in. In the crossflow type wind power generator in which the crossflow blades are attached to the rotating rotor shaft, the rotor shaft is provided with a predetermined length from the lower end along the central axis, and a hollow shaft is provided at the lower end of the rotor shaft. An inner rotor generator is installed, a bearing is provided at the upper end of the shaft hole, and a vertically standing power pole or support is fitted into the shaft hole from the power pole hole of the fixed frame of the hollow shaft inner rotor generator to the upper end. A wind power generator characterized by supporting the shaft with a bearing.

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