JP2014163249A - Vertical shaft type wind turbine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an efficient vertical shaft type wind turbine that does not become a resistance, but can generate a fast rotating speed, does not apply any unreasonable load to a weak segment and shows a smooth rotation even under weak wind due to becoming light in its weight through its operation.SOLUTION: This invention is characterized in that some vertical long plate vanes with a certain width are arranged in equally spaced apart relation around a vertical axis acting as a center of wind turbine, at least a pair of upper and lower arms are present between the vertical axis and each of the plate vanes, each of the arms is a hollow lifting type member having, as its main component, a belt-like supporting plate connected to both the vertical axis and the plate vane and having a curved upper surface plate assembled with it, the plate vanes are constructed such that they have, at their extremity ends in their rotating direction, streamlined hollow head pieces with both sides of the same rotating direction being widened in a retraction angle, the hollow space is divided into right and left segments at the extremity ends of the plate vanes, thereby the hollow space is separately opened at an outer pocket and an inner pocket at the retracting surfaces of the head pieces.

Description

  The present invention relates to a vertical wind turbine for use in wind power generation or the like.

  There are two types of windmills: a horizontal axis type and a vertical axis (vertical axis) type. In the horizontal axis type, blades are attached radially to the rotation axis of the horizontal axis. Currently, the mainstream is used for power generation. On the other hand, the vertical axis type is a type in which blades are arranged around an axis of rotation of the vertical axis via an arm.

  At present, in large wind turbine generators, almost 100% is a propeller type three blade wind turbine with a horizontal axis (horizontal axis). In this connection, the reason why the vertical axis (vertical axis) wind turbine was not used is not that the horizontal axis type wind turbine has a technical advantage, but it has succeeded in development and huge development investment. It is said that it only contains. In other words, there is plenty of room for development in the vertical field, which is undeveloped.

  Vertical wind turbines are particularly complex as in Japan because the blades rotate about the vertical axis, so they can take in the wind without any restrictions on stretching upwards and do not need to be expanded horizontally. In the land where the wind direction changes drastically due to topography, it is considered that a vertical wind turbine that is suitable for downsizing and that can accept wind from anywhere is advantageous.

  A vertical wind turbine can take in a great deal of wind power by arranging vertical blades around the vertical axis.However, if the total weight of the vertical blades increases, it causes a load on the bearings during operation. As a result, there has been a problem that the apparatus is expensive in order to obtain a rotation speed and proof strength corresponding to wind power.

  In view of the above circumstances, the present invention is not resistive and high rotational speed is obtained in order to reduce the weight by driving, and the weak part is not overwhelmed and light winds are lightly applied. An object of the present invention is to provide an efficient vertical axis wind turbine that rotates.

  In order to solve the above-described problems, the present invention is arranged such that longitudinally long and wide plate blades are arranged equally around a vertical axis that is the center of a wind turbine, and at least a pair of upper and lower plates are arranged between the vertical axis and each plate blade. Each arm is a hollow lift type in which a belt-like support plate connected to both the vertical axis and the plate blades is mainly used and a curved top plate is combined with this, The plate blade is attached to the tip edge on the rotational direction side by a streamlined head piece that is streamlined on both sides in the same direction, and the inner space is divided into left and right at the tip edge of the plate blade, Provided is a vertical wind turbine characterized in that an inner space is separately opened as an outer pocket and an inner pocket on the receding surface of the head piece.

  Since the vertical wind turbine is configured as described above, even if it is a slight wind, the arm is lifted by receiving lift force, and is rotated with reduced resistance due to weight reduction. In addition, when a strong wind is received, the resistance is eased by the force that the arm floats more strongly due to the rotational speed of the windmill, so that the rotational speed increases without difficulty. Furthermore, by using an aluminum composite plate having a thickness of 3 to 4 mm as the material constituting the plate blades and arms, more favorable results can be obtained in terms of cost and weight.

  As described above, according to the vertical axis type wind turbine of the present invention, since it is reduced in weight by driving, it does not become resistance, a high rotation speed is obtained, and a weak portion is not forced. It is suitable for manufacturing and maintenance at low cost and lightly rotates even in light winds, so it can be efficiently used for power generation, and it is suitable for Japanese climate and topography where it is difficult to obtain a constant and stable wind. effective.

1 is a partially sectional front view of a vertical wind turbine according to the present invention. It is sectional explanatory drawing which looked at the same vertical axis type windmill from the plane. FIG. 3 is a cross-sectional view taken along line AA in FIG. 2. It is a front view of the attachment part of an arm. It is plane sectional drawing of the connection part of an arm and a board blade. It is sectional drawing of the plate blade | wing seen from the top which shows another embodiment.

  In the present invention, the number of the plate blades 3 arranged around the vertical axis 1 is not particularly limited. However, since the number of sheets that work in the forward rotation is always larger than the number of sheets that work in the reverse rotation, And it is desirable that there are a small number of 3 blades or 5 blades.

  FIG. 1 to FIG. 5 show an embodiment. In the vertical wind turbine, vertical plate blades 3, 3,... Are arranged around the vertical axis 1, and the column 1 and each plate blade are arranged. A pair of upper and lower arms 5, 5 is interposed between the arms 5, 3 and the arms 5, 5,. In addition, an aluminum composite plate having a thickness of 3 to 4 mm is used as a material constituting the plate blade and each arm. This constituent material provides good results in both cost and weight.

  The vertical axis 1 is erected on a base 7 via a thrust-type lower end bearing 9, and in order to maintain verticality, several frames 11, 11, .. (Only a part of the illustration is erected), and a radial upper end bearing 13 that supports the upper end of the vertical axis 1 is provided at the center at the upper end. In addition, a high base-like bearing case 15 is installed on the base 7, and a radial intermediate bearing 17 is provided at the upper end thereof. Therefore, the vertical axis 1 is supported by the lower end bearing 9, the upper end bearing 13, and the intermediate bearing 17, and the upper and lower vertical plates 19 that screw the arms 11, 11,. 19 are projected. In addition, you may support only by the lower end bearing 9 and the intermediate bearing 17 simply.

  The structure of the arm 5 is mainly composed of a belt-like support plate 21 that is hooked and screwed to both the flange plate 19 and the plate blade 3 (FIG. 3), and a curved upper surface plate 23 is formed on the support plate 21. By combining them, the end portions 21a and 21b (excluding the support plate 21) of the support plate 21 are assembled into a lift type having a cross section similar to the main wing of an airplane (FIG. 3).

  For the assembly, the rear end portion (in the advancing direction) of the upper surface plate 23 is formed on a horizontal screw stop edge portion 25 that overlaps the upper surface of the support plate 21, and gradually rises while curving from the rear end portion to form an arc at the front end portion. The inverted tip is formed as a horizontal screw stop edge 27 that overlaps the lower surface of the front end of the support plate 21. Therefore, the vertical axis 1 and the plate blade 3 are connected by the support plate 21, and the upper surface plate 23 acts as a rib in addition to the lift force.

  The plate blade 3 is a vertically long rectangular plate, and a streamlined curved head piece 31 provided at the tip of the rotation side is integrally assembled with a clasp 33 (FIG. 5). A refracting portion 35 refracted in an L shape at a slightly acute angle is provided, and a metal fitting 33 is attached to one inner surface of the refracting portion 35 and the head piece 31 and is fastened with screws 36, 36,. A deep pocket 37 whose depth bends inward is provided outside the head piece 31, and a shallow pocket 38 is provided inside. Further, as described above, a horizontal mounting piece 39 for hooking the support plate 21 of the arm 11 is projected from the inside of the blade plate 3.

  The plate blade 3 rotates with the head piece 31 at the head, but regarding the directionality, assuming a rotating virtual circle R along the position through which the proximal end of the plate blade 3 passes (FIG. 2), a point P thereon is provided. The tip extends in the direction along the tangent line L and is connected to the arm 5 in this direction.

  The head piece 31 at the tip may be in the same direction, but is inclined inward with respect to the plate blade 3. As for this, a virtual rotation circle Ra passing through the center of the head piece 31 is assumed, and the direction is changed in the direction of the tangent line La at that position. Next, the rotation state will be described below assuming that the wind F is received from the side.

  The positions of the five blades 3 are indicated by W1, W2, W3, W4, W5, and W6, and the contact point P where the base end of the blade 3 is located with respect to the virtual rotation circle R is regarded as a fulcrum on which wind force is applied.

  First, the plate blade W1 receives not only the wind F on the entire right side of the contact P but also the outer pocket 37, so that a rotational force about the contact P is obtained.

  W2 receives a slight force because it is received by the inclined outer surface, but a large rotational force is obtained because it is received strongly by the outer pocket 37.

  Since W3 is received by the inclined surface of the inner surface, it has a slight rotational force, but since it is received by the inner pocket 38, it acts as a large rotational force.

  About W4, the whole is a posture which becomes the resistance of the wind F and works in the reverse rotation, but the whole is a clearance angle, so the resistance is small, and the forward rotation of the windmill is hardly hindered. The same applies to W5, and the whole is in a posture of a clearance angle and does not hinder the forward rotation of the windmill.

  As described above, a positive rotational force is obtained with the number 3 (W1, W2, W3) of the blade blades 3, 3,... Therefore, if the number is three or five odd, a large positive rotational force can be obtained with certainty, and it can be said that the number is desirable.

  As for the power generation device, the bearing case 15 is fixed to the vertical axis 1 and has a bevel gear 41 provided therein, a generator 43 is externally attached to the side surface, and the generator has a driven gear 45 that meshes with the bevel gear 41. It is attached.

  FIG. 6 shows another embodiment of the plate blade 3, and the plate blade 3 is provided with an attachment piece 39, and has an inner metal piece 44 and a clasp piece 45 refracted into a trapezoidal chevron at the tip. The head piece 31 is attached via the via.

DESCRIPTION OF SYMBOLS 1 Vertical axis | shaft 3 Plate blade 5 Arm 21 Support substrate 23 Upper surface plate 29 Main part plate material 31 Head piece 37 Outer pocket 38 Inner pocket R, Ra Virtual rotation circle L, La Tangent

Claims (4)

  Vertically long and wide plate blades are arranged around the vertical axis that is the center of the windmill, and at least a pair of upper and lower arms are interposed between the vertical axis and each plate blade. This is a hollow lift type consisting mainly of a belt-like support plate connected to both the shaft and the blades, and a curved upper surface plate combined with the support plate. A streamlined inner space head piece that spreads at both sides in the receding direction is attached, and the inner space is divided into left and right at the tip edge of the plate blade, so that the inner space is outside pockets on the receding surface of the head piece A vertical wind turbine characterized by being opened separately as an inner pocket.   The virtual rotating circle passing through the base end of each plate blade centering on the vertical axis is arranged so that each plate blade is in contact with the base end and directed in the tangential direction or almost tangential direction. The vertical axis wind turbine according to claim 1.   For each blade, the head piece at the tip is inclined inward so that it faces in a direction substantially parallel to the virtual rotation circle passing through the center of the blade, and both pockets are rearward according to the inclination. The vertical wind turbine according to claim 1 or 2, wherein the wind turbine is opened obliquely. The vertical wind turbine according to claim 1, 2 or 3, wherein the material constituting each plate blade and each arm is an aluminum composite plate having a thickness of 3 to 4 mm.

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