JP2009047030A - Wind power generator - Google Patents

Abstract

An object of the present invention is to eliminate metal fatigue concentrated on one place of a Savonius rotor and to improve the durability of an attachment portion.
A wind turbine unit 3 includes a Savonius rotor 13 and a Darrieus rotor 15 provided on a vertical rotating shaft 11 rotatably supported by a main body case 9. . An upper stage Savonius blade 19 having a wind receiving port 19a whose upper and lower ends are fixedly supported by a pair of upper and lower horizontal mounting plates 17 fixed to the rotating shaft 11 and whose directions are different by 180 degrees, and the Savonius rotor 13 of the wind turbine unit 3; A wind receiving port 23a which is disposed below the upper Savonius blade 19 with a predetermined gap d and is fixedly supported at both upper and lower ends by a pair of upper and lower horizontal mounting plates 21 fixed to the rotary shaft 11 and has a 180 ° orientation difference. The lower stage Savonius blade 23 has an independent mounting structure in which concentrated load does not occur due to the gap d.
[Selection] Figure 1

Description

  The present invention relates to a wind turbine generator that forms a wind turbine unit by a combination of a Darrieus rotor and a Savonius rotor.

  Generally, in wind power generation, wind power is used to rotate a windmill to ensure rotational power necessary for power generation.

  In addition to the propeller type, a type of wind turbine is known which is a combination of a Savonius rotor and a Darrieus rotor attached to a vertical rotating shaft.

  One Darrieus rotor that constitutes the windmill part is bent in an arc shape so that the upper and lower sections have a hollow wing shape and project outward with respect to the vertical rotating shaft, and both upper and lower ends are respectively attached to the rotating shaft. It has a structure.

  The other Savonius rotor has a structure in which the upper and lower ends of a vertically long Savonius blade formed in a semicircular arc shape with a cylinder divided in half are fixedly supported by horizontal mounting plates fixed to the rotating shaft. ing.

  The upper and lower Savonius blades have a length that matches the power generation capacity by a combination of upper and lower Savonius blades.

  The upper Savonius blade is attached to the upper, middle and lower parts of the rotating shaft, and the upper and middle horizontal mounting plates are fixed, and the lower Savonius blade is attached to the upper and lower ends of the middle and lower horizontal mounting plates. Fixedly supported.

  The upper and lower ends of the upper and lower Savonius blades of the Savonius rotor constituting the wind turbine unit are fixedly supported at upper and lower ends by three horizontal mounting plates arranged at the upper, middle, and lower portions.

  The Savonius rotor is rotated in response to wind, but there is a problem that metal fatigue of the mounting plate in the middle part occurs most quickly among the three points of the upper part, middle part, and lower part that support the blade.

  In particular, metal fatigue shortens the life of the mounting portion, while causing damage to the mounting portion and causing vibration noise.

The reason why the middle mounting plate causes metal fatigue the fastest
For example, the lower end of the upper Savonius blade is attached to the intermediate mounting plate, and the upper end of the lower Savonius blade is also used as an attachment means to be attached together.
Also, when rotating with wind, the upper and lower Savonius blades have a total length of metric units. It is thought to do.

  In this case, in order to prevent deterioration caused by metal fatigue and improve durability, measures such as increasing the thickness of each blade including the mounting part can be considered, but a new problem that leads to an increase in the weight of the windmill part This is not desirable in terms of cost.

  Accordingly, an object of the present invention is to provide a wind turbine generator that can eliminate a metal fatigue concentrated on one part of the Savonius rotor and can provide a stable wind turbine part over a long period of time.

  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 generator comprising a stator arranged and fixed in the main body case and a rotor that rotates together with the rotating shaft, and the Savonius rotor of the wind turbine unit includes at least a pair of upper and lower horizontal members fixed to the rotating shaft. An upper stage Savonius blade having a wind receiving opening that is fixedly supported at both upper and lower ends by a mounting plate and a mounting plate and having a 180 ° orientation difference, and a predetermined gap below the upper stage Savonius blade and is fixed to the rotating shaft. The upper and lower ends are fixedly supported by a pair of upper and lower horizontal mounting plates and mounting plates, 180 degrees It can be characterized in that is constituted by the lower Sabo Fresenius blades having different wind receptacle.

  According to the present invention, the upper Savonius blade can be independently mounted with a pair of upper and lower horizontal mounting plates, and the lower Sabonius blade can be independently mounted with a pair of upper and lower horizontal mounting plates, so In addition, while ensuring the function as a long Savonius rotor, it is possible to eliminate the part where the twist is concentrated in one place. As a result, the durability of the entire mounting plate is improved, and vibration noise caused by metal fatigue can be reduced.

  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 wind turbine unit 3 that rotates by receiving wind, and a power generation unit 5 that generates electric power by rotational power from the wind turbine unit 3, and a predetermined height from the ground surface by a support tower 7 (the 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.

  As shown in FIGS. 1 and 3, 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.

  Arc-shaped Darrieus rotors 15 are 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 order to arrange the Darius rotor 15 at three positions at intervals of 120 degrees, it is desirable that the Darius rotor 15 be attached at exactly 120 degrees. In this embodiment, the mounting member 25 can be positioned at an accurate 120-degree position by the pair of positioning pins 26, because when the deviation occurs and the deviation occurs, it appears as vibration noise during rotation. .

  As shown in FIGS. 3 and 4, the mounting member 25 has a hollow section and a mounting section 33 that is mounted on the flange portion 27 of the rotary shaft 11 by a bolt 29 and a nut 31 in a state where the mounting member 25 is accurately positioned at a position of 120 degrees by the positioning pin 26. The attachment cylinder 33 and the holding cylinder part 35 are integrally fixed to each other by welding.

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

  The Savonius rotor 13 includes a pair of upper-stage Savonius blades 19 and a pair of lower-stage Savonius blades 23 formed in a semicircular arc shape obtained by dividing a cylindrical tube in half along the axial direction.

  The upper stage Savonius blade 19 is disposed between a pair of upper and lower upper horizontal plates 17 fixed to and supported by the rotary shaft 11 and the horizontal plate 17, and both upper and lower ends thereof are fixed. As shown in FIG. Has a shape provided in directions different from each other by 180 degrees.

  The lower-stage Savonius blade 23 is disposed with a predetermined gap d (see FIG. 1) at a lower position shifted by 90 degrees with respect to the upper-stage Savonius blade 19, and a pair of upper and lower lower sides fixedly supported by the rotary shaft 11. It is arranged between the horizontal plate 21 and the horizontal plate 21 and the upper and lower ends are respectively fixed, and the wind receiving port 23a is provided in a direction different in direction by 180 degrees as shown in FIG.

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

  The gap d between the upper stage Savonius blade 19 and the lower stage Savonius blade 23 prevents the load from concentrating on a part of the mounting plate by separating the upper stage Savonius blade 19 and the lower stage Savonius blade 23. Although it differs, it is desirable that it exists in the range of 9-12 mm.

  On the other hand, the power generation unit 5 includes a stator 45 fixedly supported in the main body case 9 and a rotor 47 that rotates together with the rotating shaft 11. The stator 45 and the rotor 47 are proportional to the diameter and the rotational speed of the rotor 45. Large power generation capacity.

  In FIG. 6, reference numeral 51 denotes a braking device.

  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.

  At the time of power generation, the upper stage Savonius blade 19 is independently attached by a pair of upper and lower horizontal attachment plates 17 and the lower stage Savonius blade 23 is independently attached by a pair of upper and lower horizontal attachment plates 21, so that the twist is concentrated. As a result of the absence of the portion, the durability of the entire mounting portion can be improved without increasing the strength such as the thickness. In addition, noise caused by metal fatigue can be reduced.

The outline front view showing the wind power generator concerning the present invention. The AA line expanded sectional view of FIG. FIG. 2 is a schematic plan view of a part when viewed from a direction B in FIG. 1. FIG. 1C is an enlarged cross-sectional view of a portion C. The cross-sectional outline perspective view seen from AA of FIG. The schematic explanatory drawing which showed the electric power generation part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Wind power generator 3 Windmill part 5 Power generation part 9 Main body case 11 Rotating shaft 13 Savonius rotor 15 Darrieus rotor 17, 21 Mounting plate 19 Upper stage Savonius blade 19a, 23a Wind receiving port 23 Lower stage Savonius blade d Crevice

Claims (1)

A vertical rotating shaft rotatably supported by a 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 and fixed in the main body case, and the rotating shaft A power generation unit comprising a rotor that rotates together,
The Savonius rotor of the windmill part includes an upper Savonius blade having a wind receiving port that is fixedly supported at both upper and lower ends by at least a pair of upper and lower horizontal mounting plates fixed to the rotating shaft and different in orientation by 180 degrees, and the upper stage A lower stage having a wind receiving port disposed at a lower position of the Savonius blade with a predetermined gap and fixedly supported at both upper and lower ends by a pair of upper and lower horizontal mounting plates fixed to the rotating shaft and different in orientation by 180 degrees. A wind turbine generator comprising a Savonius blade.

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