JP2009047029A - Wind power generating device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent the scattering at rupture besides reducing the weight of a Darrieus rotor. <P>SOLUTION: The device is constituted of a vertical rotary shaft 11 rotatably supported by a body case 9, a wind-turbine part 3 formed by combining a Darrieus rotor 15 and a Savonius rotor 13 provided to the rotary shaft 11 and a power generating part 5 made up of a stator 45 arranged and rotationally supported in the body case 9 and a rotor 47 rotating together with the rotary shaft 11. The Darrieus rotor 15 in the windmill part 3 is bent in an arc shape of a wing-like shape having a hollow in a cross section to mount both upper and lower ends in the rotary shaft 11 via mounting members 25. A rope 41 for scattering prevention is provided in the rib 39 provided to inside spaces on both sides of the Darrieus rotor 15 so as to be disposed along the rib 39, whereby preventing the scattering. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a wind turbine generator that prevents scattering even when a rotating blade breaks.

  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 Darrieus rotor has a curved shape that is long in the vertical direction along the rotating shaft, and the size from the upper end mounting portion to the lower end mounting portion is close to 4 m when the size is increased.

  The Darrieus rotor that forms the windmill part is designed to be bent in an arc and is designed to prevent fatigue accumulation with its upper and lower ends fixedly supported. However, the larger one still has a shape close to 4 m as described above. In addition, it is affected by strong winds. For this reason, in order to prevent breakage and the like in the Darrieus rotor, countermeasures have been taken by increasing the strength such as increasing the overall shape and the thickness of the mounting part, but on the other hand, there is a problem that leads to an increase in weight. Hold it. Considering the aspect of rotational efficiency, it is better to be light, and an increase in weight is not desirable because it becomes negative in terms of rotational efficiency.

  Accordingly, an object of the present invention is to provide a wind turbine generator that prevents the Darrie rotor from scattering while reducing the weight.

  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 arranged and fixed in the main body case and a rotor that rotates together with the rotating shaft, and the Darrieus rotor is bent in an arc shape with a hollow wing-like shape and has upper and lower ends Is attached to the rotary shaft via an attachment member, and a rope for preventing scattering is provided along ribs provided on both sides of the interior space of the Darrieus rotor.

  According to the present invention, even if the Darrieus rotor breaks due to, for example, any factor, the scattering prevention ropes provided on both sides of the inner part act as blocking means for preventing scattering, and high safety. Can be secured.

  In addition, since the rope for preventing scattering acts as a reinforcing member for the Darius rotor, the entire Darius rotor can be formed into a thin wing shape with a hollow cross section. As a result, the weight of the Darius rotor can be reduced and the rotational efficiency is very favorable.

  Hereinafter, embodiments of the present invention will be specifically described with reference to FIGS. 1 to 8.

  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 (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.

  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 as shown in FIGS. Yes.

  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. 1 and 2, the Darrieus rotor 15 is bent in an arc shape with a hollow wing shape having a long cross section so as to form an arc when the rotating shaft 11 is assumed to be a string.

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

  As shown in FIGS. 3 and 4, the mounting member 25 includes a mounting portion 33 that is attached to the flange portion 27 of the rotary shaft 11 that is positioned by the positioning pin P by a bolt 29 and a nut 31, and a wing-like shape having a hollow cross section. The mounting part 33 and the holding | maintenance cylinder part 35 become 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.

  Ribs 39 having a C-shaped cross section are continuously provided along the longitudinal direction of the Darrieus rotor 15 on both sides of the internal space of the Darius rotor 15, and the ribs 39 are provided for preventing scattering along the ribs 39. A rope 41 is provided.

  The scattering prevention rope 41 is a Kepler rope made of a material having high tensile strength.

  As shown in FIGS. 4 and 5, both ends of the rope 41 for preventing scattering are from top to bottom with respect to a plurality of rope attachment holes 43 orthogonal to the rope body provided in the attachment portion 33 of the attachment member 25. It uses a means that penetrates in order from top to bottom.

  As a result, the rope 41 for preventing scattering has a strong contact resistance of the rope with respect to the attachment hole when penetrating the rope attachment hole 43 so as to sew up and down without connecting the rope end portion, and the contact resistance thereof. Combined with the condition of the direction perpendicular to the rope body (Fig. 5, left and right direction), when a tensile load is applied to the rope body, a strong resistance to the pulling direction is created, preventing the pulling out. Yes.

  In FIG. 8, reference numeral 51 denotes a braking device.

  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 rotation speed of the rotor 47. Large power generation capacity.

  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, for example, even if the Darrieus rotor 15 is cracked and broken due to the influence of strong winds, it is ensured that the scattering prevention rope 41 works and is swung out in all directions by centrifugal force during rotation. To stop.

  Moreover, the power generation operation with high rotation efficiency can be performed by reducing the weight of the Darrieus rotor 15 due to the thin wall.

The outline front view showing the wind power generator concerning the present invention. The cross-sectional outline perspective view seen from AA of FIG. The expanded sectional view of the B section of FIG. The one outline perspective view which showed the attachment member. CC sectional view of FIG. FIG. 2 is a schematic plan view of a part when viewed from a direction D in FIG. 1. The EE sectional view taken on the line 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 25 Attachment member 33 Attachment part 35 Holding cylinder part 39 Rib 41 Rope for scattering prevention

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 The Darrieus rotor is bent in a circular arc shape with a hollow wing shape in cross section, and the upper and lower ends thereof are attached to the rotary shaft via attachment members, A wind power generator characterized in that a rope for preventing scattering is provided in a rib provided on both sides of the internal space of a Darius rotor.

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