JP2009047031A - Wind power generator - Google Patents

Abstract

A power generation unit capable of obtaining efficient rotational power without increasing its size.
A wind turbine unit 3 comprising a combination of a Savonius rotor 13 and a Darrieus rotor 15 provided on a vertical rotating shaft 11 rotatably supported by a main body case 9 and a stator 41 disposed in the main body case 9. And the power generation unit 5 including the rotor 43 that rotates together with the rotary shaft 11, and the stator 41 is fixed in the main body case 9 on the axis of the rotary shaft X below the rotary shaft 11. On the other hand, the rotor 43 is arranged in a ring shape so as to surround the stator 41 and is integrally attached to the lower portion of the rotating shaft 11.
[Selection] Figure 1

Description

  The present invention relates to a wind turbine generator that includes a wind turbine that rotates by receiving wind and a power generator that includes a rotor and a stator.

  In general, wind power generation includes a windmill unit that rotates by receiving wind and a power generation unit that generates power by rotational power from the windmill unit.

  In the power generation unit, the rotor shaft is rotatably supported in the power generation case, and the rotor is integrally provided on the rotatably supported rotor shaft. A stator is disposed on the outer periphery of the rotor so as to surround the rotor, and is formed into an independent unit structure supported along the inner wall of the power generation case.

  The power generation case is arranged in parallel with the rotation shaft in a main body case that rotatably supports the rotation shaft of the wind turbine unit, and the rotor shaft extends and projects downward from the power generation case.

  The rotor shaft extending downward and the rotating shaft are conductively connected via a gear transmission mechanism comprising a combination of gears, and the rotational power from the wind turbine unit is transmitted from the rotating shaft to the gear transmission mechanism to the rotor shaft. It has become.

  It is desirable that the power generation part of the wind turbine generator be small and light from the place supported by the support tower together with the windmill part, but the main body case that becomes the power generation part is made independently with the rotating shaft of the windmill part. In addition to the fact that the power generation cases are arranged in parallel, there is also a problem of increasing the size because a gear transmission mechanism for transmitting the rotational power of the rotary shaft to the rotor shaft of the power generation case is required. Further, the gear transmission mechanism leads to conduction loss and is not desirable in terms of assembly and cost.

  Therefore, an object of the present invention is to provide a wind turbine generator including a power generation unit that can obtain efficient rotational power without increasing the size.

  In order to achieve the above object, in the present invention, a vertical rotating shaft that is rotatably supported by a main body case, and a windmill unit comprising a combination of a Savonius rotor and a Darrieus rotor provided on the rotating shaft, A power generation unit including a stator disposed in the main body case and a rotor that rotates together with the rotary shaft; the stator is fixed in the main body case on the axis of the rotary shaft below the rotary shaft; On the other hand, the rotor is arranged in a ring shape so as to surround the stator, and is integrally attached to a lower portion of the rotating shaft.

  According to the present invention, the stator is disposed below the axial center line of the rotating shaft, while the rotor surrounding the stator is directly attached to the rotating shaft, so that the entire main body case can be reduced in size. Further, the weight transmission can be reduced by omitting the gear transmission mechanism, and efficient transmission without transmission loss can be ensured. As a result, there is an advantage that the rated output can be achieved at a low rotational speed in combination with the outer rotor on which the rotor rotates on the outside of the stator.

  In carrying out the present invention, it is desirable that the rotor is used as a brake disk mounting means by mounting a brake disk of a brake device that rotates horizontally together with the rotor.

  Hereinafter, embodiments of the present invention will be specifically described with reference to FIGS. 1 to 6.

  FIG. 1 shows a schematic explanatory diagram of a wind turbine generator according to the present invention. The wind turbine generator 1 includes a windmill unit 3 that rotates by receiving wind and a power generation unit 5 that generates electric power using rotational power from the windmill unit 3, and a predetermined height from the ground surface by a support tower 7 (lower half is omitted). It is designed to be installed at a height.

  The windmill unit 3 has a combined structure in which a Savonius rotor 13 and a Darrieus rotor 15 are provided on a vertical rotating shaft 11 that is rotatably supported by a main body case 9.

  2 and 3, the Savonius rotor 13 is composed of a pair of upper Savonius blades 19 and a pair of lower Savonius blades 23 formed in a shape obtained by dividing a cylindrical tube in half along the axial direction. .

  The upper Savonius blade 19 is disposed and fixed between a pair of upper and lower upper horizontal plates 17 fixedly supported on the rotating shaft 11 and the horizontal plate 17, and has a shape in which the wind receiving port 19a is provided in a direction different in 180 degrees. It has become.

  The lower-stage Savonius blade 23 is disposed at a lower position that is shifted by 90 degrees with respect to the upper-stage Savonius blade 19, and is disposed and fixed between a pair of upper and lower lower horizontal plates 21 fixed to the rotary shaft 11 and the horizontal plate 21. In addition, the wind receiving port 23a has a shape provided in directions different from each other by 180 degrees.

  Therefore, the wind hits each wind receiving port 19a, 23a with respect to the wind from any direction, and rotational power can be obtained.

  As shown in FIGS. 2 and 6, the Darrieus rotor 15 is bent in an arc shape with a hollow wing-like shape with a long cross section so as to form an arc when the rotating shaft 11 is assumed to be a chord.

  As shown in FIG. 4, the arc-shaped Darius rotor 15 is arranged at three positions at intervals of 120 degrees, and both upper and lower ends are attached to the rotary shaft 11 via attachment members 25.

  In this case, the number of Darrieus rotors 15 is not necessarily three, but may be at least two.

  As shown in FIGS. 4 and 5, the mounting member 25 is formed in a wing-like shape having a hollow section and a mounting portion 33 that is fixed to the flange portion 27 of the rotary shaft 11 by a positioning pin 26 by a bolt 29 and a nut 31. It consists of the holding cylinder part 35, and the attachment part 33 and the holding cylinder part 35 have a structure fixed integrally by welding.

  A terminal portion of the Darrieus rotor 15 is inserted into the holding cylinder portion 35, and the insertion allowance region serves as a fixing means that is riveted by a large number of rivets 37.

  On the other hand, the power generation unit 5 includes a stator 41 fixedly supported in the main body case 9 and a rotor 43 that rotates together with the rotary shaft 11 as shown in FIG. 1, and the main body case 9 constitutes a power generation case.

  The rotary shaft 11 is rotatably supported by upper and lower bearings 47 and 48 such as bearings in a vertically long support cylinder 45 fixedly supported in the main body case 9. The upper bearing 47 of the support cylinder 45 has a structure that also serves as a support means for rotatably supporting the flange portion 27 for attaching the mounting member 25 of the Darrieus rotor 15 in addition to rotatably supporting the rotary shaft 11.

  The stator 41 is fixed to the stator shaft 49 at a lower position on the axis X of the rotary shaft 11. The stator shaft 49 is integrally attached to a pedestal 51 whose lower end is fixed to the main body case 9. The upper end portion of the stator shaft 49 is supported by a bearing 53 such as a bearing in the lower space of the rotating shaft 11.

  Thereby, the rotating shaft 11 can be rotated without being affected by the fixed stator shaft 49.

  On the other hand, the rotor 43 is arranged in a ring shape so as to surround the stator 41, is integrally attached to the lower portion of the rotating shaft 11, and is an outer rotor type that can rotate together with the rotating shaft 11.

  A brake disc 57 of a brake device 55 that rotates horizontally is integrally attached to the rotor 43, and the rotor 43 has a structure that also serves as an attachment means of the brake disc 57.

  The brake device 55 is supported in the main body case 9 by a support bracket 59, and a pair of upper and lower brake pads (not shown) that strongly contact the brake disc 57 and the brake disc 57 from above and below to provide sliding resistance. ). The brake pad operates a manual operation wire 61 to actuate a hydraulic operation mechanism (not shown), and the brake pad strongly contacts the brake disc 57 from above and below, thereby braking the rotating shaft 11 and the wind turbine unit 3. Has come to work.

  According to the wind power generator 1 configured in this manner, when the wind hits the Savonius rotor 13, the rotating shaft 11 starts to rotate, and the Darrieus rotor 15 works by the rotation, and the rotating shaft 11 enters a full operation rotation.

  The rotational power of the rotary shaft 11 is transmitted to the power generation unit 5 to ensure power generation corresponding to the rotational speed.

  During this power generation, the rotational power of the rotary shaft 11 is directly transmitted to the rotor 43, so that efficient transmission without transmission loss can be obtained. At the same time, the rotor 43, in combination with the outer rotor rotating on the outside of the stator 41, has the advantage that the rated output can be achieved at a low rotational speed.

  On the other hand, the overall structure of the main body case can be reduced in size and the gear transmission mechanism can be omitted due to the structure in which the stator 41 is directly attached to the rotary shaft 11 at a lower position on the axis X of the rotary shaft 11. Each can be reduced in weight.

The outline sectional view showing the power generation part of the wind power generator concerning the present invention. The outline front view showing the wind power generator concerning the present invention. FIG. 3 is a cross-sectional view taken along line AA in FIG. 2. FIG. 3 is a schematic plan view of a portion as viewed from a direction B in FIG. 2. The expanded sectional view of the D section of FIG. The cross-sectional outline perspective view seen from AA of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Wind power generator 3 Windmill part 5 Electric power generation part 9 Main body case 11 Rotating shaft 13 Savonius rotor 15 Darrieus rotor 41 Stator 43 Rotor X Rotating shaft axis

Claims (2)

Together with a vertical rotating shaft rotatably supported by the main body case, a windmill portion comprising a combination of a Savonius rotor and a Darrieus rotor provided on the rotating shaft, a stator disposed in the main body case, and the rotating shaft And a power generation unit composed of a rotating rotor,
The stator is fixedly supported in a main body case on the axis of the rotation shaft below the rotation shaft, while the rotor is arranged in a ring shape so as to surround the stator and is integrated with a lower portion of the rotation shaft. A wind turbine generator, which is attached to   The wind turbine generator according to claim 1, wherein a brake disc of a brake device that rotates horizontally together with the rotor is attached to the rotor.

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