JP3048863U - Wind power generator - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To drive a generator using wind power effectively despite its relatively small diameter. SOLUTION: An appropriate number of air guide holes 10 are provided at appropriate places of a trumpet-shaped air guide tube 4 which expands forward, and each of the air guide holes 10 is inclined outward toward the rear side. A forward propeller plate 11 is provided, and a propeller 6 linked to drive the generator 8 is disposed inside the rear end of the baffle tube 4.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a wind turbine generator installed on the ground or the like.

[0002]

[Prior art]

 Conventionally, among wind power generators that have been put into practical use, the most efficient ones and the ones that are frequently used because of their simple configuration are usually located at the upper end of a support tower that is erected on the ground or the like. A propeller composed of two or three blades is provided so as to be rotatable about a horizontal axis and rotatable about a vertical axis, and by appropriate means, the rotating surface of the propeller is always perpendicular to the wind. It was done.

[0003] The propeller rotates at a speed according to the diameter and shape of its blades and its pitch according to the wind speed. By driving the generator with this rotational force, the wind power is converted into usable electric energy. Is done.

[0004]

[Problems to be solved by the invention]

 Since the propellers are inherently rotated by the flow of low-density air, even if their diameter and area are as large as possible, a maximum of about 45% of the wind energy passing through the rotating surface of the propellers is available. The fact is that the energy is simply recovered.

According to the present invention, even if the outer diameter is the same as that of a conventional propeller, wind energy can be remarkably effectively recovered as compared with the conventional one, so that a highly efficient power generation effect can be obtained. The purpose is to obtain a wind power generator.

[0006]

[Means for Solving the Problems]

 In order to achieve the above object, the wind turbine generator of the present invention is configured as follows.

(1) An appropriate number of air guide holes are provided at appropriate positions of a wind guide tube that expands forward, and forward wind guides inclined outward are provided behind each of the air guide holes. A plate is provided, and a propeller linked to drive a generator is disposed inside the rear end of the air guide tube.

[0008] (2) An appropriate number of air guide holes are provided in an appropriate position, expanding forward, and a forward air guide plate is provided at the rear side of each air guide hole to be inclined outward. A plurality of wind guide cylinders, the front end of which is superimposed with the rear end of the front one, and arranged in series on the same axis, and the rear end of the last wind guide cylinder A propeller linked to drive the generator is installed inside the.

[0009] (3) An appropriate number of air guide holes are provided at appropriate positions, and the front air guide plate is provided at the rear side of each air guide hole to be inclined outwardly. A plurality of wind guide cylinders, the front end of which is close to the rear end of the front wind guide, and are arranged side by side on the same axis in a line. Inside, a propeller linked to drive the generator is installed.

(4) The wind power generator according to the above (1) to (3) is mounted on a substrate capable of turning around a vertical axis.

(5) In the above item (4), the generator and its transmission line are also mounted on the board.

[0012]

[Embodiment of the invention]

 1 and 2 show one embodiment of the device of the present invention. In FIG. 1, the left side is the front.

At the upper end of a vertical tubular support shaft (1) that is erected and fixed on the ground or the like, a portion of the horizontal substrate (2) that is slightly forward from the front-to-rear center is a tapered roller type thrust bearing (3). It is supported so as to be able to turn around the support shaft (1) lightly through the shaft.

On the base plate (2), a trumpet-shaped air guide tube (4) that expands forward is mounted with support pieces (5) and (5).

A propeller (6) rotatable around its axis is disposed inside the rear end of the air guide tube (4), and a rotating shaft (7) integral with the propeller (6) is: The generator (8) fixed to the substrate (2) is driven via appropriate gears (9) (9).

The side surface shape of the air guide tube (4) is such that the air flowing from the front end thereof and the air flowing backward along the outer surface smoothly flow without generating a vortex or an excessive pressure reducing portion. It is defined.

The inner and outer surfaces of the air guide tube (4) are made of a material having a minimum friction with air, and are finished smoothly so as to minimize irregularities.

Slightly behind the front end of the air guide tube (4), there are provided four air guide holes (10) arranged at equal intervals in the circumferential direction.

Each of the air guide holes (10) has a front edge (10a) having a linear shape and a rear edge (10b) having a semicircular shape that is concave forward.

The rear edge (10b) is provided with a rear edge of a forward-facing wind guide plate (11) inclined outwardly so as to substantially cover the wind guide hole (10).

When providing the air guide hole (10), first, a linear front edge (10a) is cut out at an appropriate position of the air guide tube (4), and the rear portion of the air guide hole (10) is provided. If the wall of the air guide tube (4) corresponding to the edge (10b) is inclined outward and forward, the air guide hole (10) and the air guide plate (11) are formed simultaneously. This is convenient.

An accommodation space (13) is formed by providing a flat box-shaped bottom plate (12) integrally with a slight gap on the lower surface of the substrate (2).

Immediately below the thrust bearing (3), a support (14) is projected from the lower surface of the bottom plate (12), and a radial ball bearing (15) provided in the support (14) is A portion slightly below the upper end of the support shaft (1) is supported.

The generator (8) is fixed in the accommodation space (13) at the lower rear side of the propeller (6).

The conductors (16) and (16) led out of the generator (8) pass through the housing space (13), and the brushes (17) and (17) at the ends thereof support the support shaft (1). Are elastically in contact with the slip rings (18) provided on the outer surface of the. Each slip ring (18) is connected to a transmission line (19) that passes through the support shaft (1).

Next, the operation will be described. Since the substrate (2) is rotatable around the support shaft (1), the front surface of each air guide tube (4) is always wind-driven by wind pressure or by appropriate detection and control means, as is well known. Turn upwards.

Therefore, the airflow that has flowed into the front portion of the air guide tube (4) is accelerated in the air guide tube (4), and then discharged from the rear end in a pressurized state.

A substantial part of the airflow flowing from the front along the outer surface of the air guide tube (4) is guided into the air guide hole (10) by the air guide plate (11), and The air is discharged at an increased speed from the rear end, and is effectively sucked in by the suction effect of the airflow, added to the air flowing in from the front of the air guide tube (4), and discharged from the rear end of the air guide tube (4). I do.

Therefore, the airflow is increased by the baffle 4, and the airflow is discharged at a remarkably high speed as compared with the wind in the natural state. Is performed.

Next, the relationship between the airflow flowing into the baffle tube (4) from the front and discharged therefrom and the outside air drawn by the baffle plate (11) and flowing through the baffle holes (10) will be described. Consider.

Assuming that the wind speed v, the density of the air is ρ, the static pressure is p, the acceleration of the power is g, and the height from the reference plane is z, by Bernoulli's theorem,

[0032]

(Equation 1) It is.

In the following, each section of the air guide tube will be described by adding the following subscripts to the above values. Front end face of wind guide tube (4) 1 Same rear end face 2 Front end face of wind guide plate (11) 3

The opening area of the rear end face of the air guide tube (4) is １ ／ of that of the front end face, and the total front opening area of the four air guide plates (11) is ) Of the front end face. Note that the plate pressure of the air guide tube (4) is ignored.

Air pressure at the front end face and the rear end face of the air guide cylinder According to the Bernoulli equation,

[0036]

(Equation 2) From equations (2) and (3)

[0037]

(Equation 3)

Assuming that the areas of the front end and the rear end of the air guide tube are A ₁ and A ₂ , respectively, A ₁ v ₁ = A ₂ v ₂ And A ₂ = 1/2 · A ₁

[0039]

(Equation 4)

[0040] Thus, p ₂ is the fact that considerably larger becomes than p _1, area than the previous direction the opening of the air guide plate is A _1/2 (11), outside air p ₁ v ₁ is sucked to flow Become.

Air flow rate (W) Section 1 W ₁ = A ₁ v ₁ Section 2

[0042]

(Equation 5)

Section 3

(Equation 6)

That is, it can be seen that the amount of air discharged from the rear end of the air guide tube (4) is twice that from the front end.

FIG. 3 schematically shows a second embodiment of the present invention, in which a plurality of air guide cylinders (4) similar to those described above are provided, the front end of which has a front end and a rear end having a front end. In the superposed state or close to each other, they are arranged in series on the same axis, and a propeller (6) for driving the generator (8) is provided inside the rear end of the rearmost air guide tube (4). It is arranged. Other configurations are the same as those in FIGS. 1 and 2, and the same reference numerals are given to the same parts. In this way, the speed of the air discharged from the rear end of the rearmost wind guide cylinder (4) is further increased, and effective wind energy recovery is performed.

[0046]

[Effect of the invention]

 (a) According to the present invention, even if the outer diameter of the wind guide tube is the same as the diameter of the propeller in the conventional propeller type wind turbine, the propeller rotates at a higher speed with a larger amount of air than the conventional one. Wind power can be effectively recovered and efficient power generation can be achieved.

(B) According to the fifth aspect, it is possible to easily collect and use the power generated by a large number of wind power generators of the present invention.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional side view conceptually showing one embodiment of a wind power generator of the present invention.

FIG. 2 is a vertical sectional front view taken along the line II-II in FIG.

FIG. 3 is a vertical sectional side view showing a second embodiment of the present invention.

[Explanation of symbols]

 (1) Support shaft (2) Substrate (3) Thrust bearing (4) Blast tube (5) Support piece (6) Propeller (7) Rotary shaft (8) Generator (9) Gear (10) Blow hole ( 11) Wind guide plate (12) Bottom plate (13) Housing space (14) Support tube (15) Radial bearing (16) Conductor wire (17) Brush (18) Slip ring (19) Transmission line

Claims (5)

[Utility model registration claims] 1. In an appropriate position of a wind guide cylinder that expands forward,
A suitable number of air guide holes are provided, and a forward-facing wind guide plate inclined outward is provided on the rear side of each air guide hole, and a generator is provided inside the rear end of the air guide tube. A wind power generator, comprising a propeller linked to drive. 2. A frontal air guide plate which expands forward and is provided with an appropriate number of air guide holes at appropriate positions, and a forwardly directed wind guide plate which is inclined outwardly is provided at the rear side of each air guide hole. A plurality of air guide cylinders are arranged in series on the same axis so that the front end is superimposed with the rear end of the front air guide, and the rear end of the rearmost air guide cylinder is A wind power generator, wherein a propeller linked to drive a generator is disposed inside. 3. A frontal air guide plate which expands forward and has an appropriate number of air guide holes at appropriate places, and a forwardly directed air guide plate which is inclined outwardly is provided at a rear side of each air guide hole. A plurality of air guide cylinders are arranged in series on the same axis so that the front end is close to the rear end of the front air guide cylinder, and inside the rear end of the last air guide cylinder. A wind power generator, comprising a propeller linked to drive a generator. 4. The air guide tube and the propeller are mounted on a substrate capable of turning around a vertical axis.
4. The wind power generator according to any one of 3. 5. The wind power generator according to claim 4, wherein the generator and the transmission line by the generator are also mounted on the substrate.