JP2000220561A - Wind power generator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively recover wind energy, and improve power generating effect by arranging a driving fan rotated by flow-in air current, and a suction fan rotated by the driven fan, on a cylindrical wind leading cylinder front end part, and arranging a driving fan for driving a power generator on a wind leading cylinder rear end part. SOLUTION: A horizontal base plate 2 is supported to an upper end of a tubular supporting shaft 1 erected on the ground and the like through a taper roller type thrust bearing 3 freely to turn, and a cylindrical wind leading cylinder 4 having a constant diameter is attached on the base plate 2. A rotary shaft 8 of a driven fan 7 radially provided with a plurality of blades 6 is rotatably supported to a front end part of the wind leading cylinder 4 by a bearing 10, and a suction fan 11 is integratedly formed on an outer end of a diameter direction of each blade 6. A driving fan 12 is rotatably supported to a rear part of the wind leading cylinder 4. The driving fan 12 is rotated by outside air led into the wind leading cylinder 4 with high speed by rotation of the suction fan 11, and thereby, a power generator 17 connected to the rotary shaft 16 is driven.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wind turbine generator installed on the ground or the like.

[0002]

2. Description of the Related Art Among wind turbine generators that have been put into practical use, the one that is used most frequently because it has the highest efficiency and is simple in construction is located at the upper end of a support tower that stands on the ground or the like. A propeller, usually a driven fan, usually consisting of two or three blades, provided rotatably about a horizontal axis and pivotable about a vertical axis,
Is an open type in which the rotating surface of the driven fan is always perpendicular to the wind by appropriate means.

[0003] The propeller rotates at a speed according to the diameter and shape of the blade and the pitch thereof according to the wind speed. By driving the generator with this rotational force,
Wind power is converted to available electrical energy.

[0004]

In the above-described open type fan, the driven fan is rotated by the flow of low-density air. The reality is that only about 45% of the wind energy passing through the rotating face of the fan is recovered as available energy.

An object of the present invention is to provide a wind power generator capable of remarkably effectively recovering wind energy and obtaining a highly efficient power generation effect as compared with the conventional one.

[0006]

In order to achieve the above object, a wind power generator according to the present invention is configured as follows.

(1) A driven fan rotated by an inflow air flow and a suction fan rotated by the driven fan are provided at the front end on the axis of the cylindrical air guide tube. A drive fan for driving the generator is disposed at the rear end of the drive.

(2) In the above item (1), the suction fan is provided integrally with the driven fan.

(3) In the above item (1) or (2), the suction fan is integrally provided at a radially outer end of the driven fan.

(4) In any one of the above items (1) to (3), the driven fan is a propeller type.

(5) In any one of the above items (1) to (4), the driven fan and the suction fan are formed by cutting and raising the driven fan and the suction fan in a circumferential direction around the center of the disk, and are inclined in a certain direction. It shall consist of a blade.

(6) In the above item (1), the suction fan is attached to a rotating shaft that is integral with the driven fan.

(7) In any one of the above items (1) to (6), the air guide tube is made of a cylinder having a constant diameter.

(8) In any one of the above items (1) to (6), the baffle tube may have a trumpet shape that expands forward.

(9) In any one of the above items (1) to (8), the air guide tube and all the fans are mounted on a substrate capable of turning around a vertical axis.

(10) In the above item (9), the generator and the transmission line by the generator are also mounted on the board.

[0017]

FIG. 1 shows a first embodiment of the apparatus of the present invention. In FIG. 1, the left side is the front.

[0018] A vertical tubular support shaft standing and fixed on the ground or the like.
At the upper end of (1), a point slightly forward from the center in the front-rear direction of the horizontal substrate (2) is swirled around the support shaft (1) through a tapered roller type thrust bearing (3). It is supported as it is.

On the substrate (2), a cylindrical air guide tube having a constant diameter is provided.
(4) is attached with support pieces (5) and (5).

A driven fan having a plurality of blades (6) twisted in a fixed direction on the axis of the front end of the air guide tube (4).
A rotating shaft (8) integral with (7) is pivotally supported by a bearing (10) supported by supporting rods (9) and (9) so as to be able to rotate lightly.

At the radially outer end of each blade (6), there is integrally provided a suction fan (11) consisting of a blade that twists more than in the blade (6).

The pitch of the blades (6) of the driven fan (7) and the blades constituting the suction fan (11), that is, the degree of twist, the radial dimension, the width and shape as viewed from the front, and both These ratios in the blade are set so as to appropriately perform the operation described below.

At the rear of the air guide tube (4), on the axis of the air guide tube (4), a driving fan having a diameter slightly smaller than that of the driven fan (7) is provided.
(12) and a small-diameter housing (13) for supporting the same are provided in order from the front.

The drive fan (12) has two blades (14) (1
4), and the housing (13) is fixed to the inside of the air guide tube (4) with supporting rods (15) and (15). Housing (1
3) The rear end (13a) has a sharp conical shape pointing rearward.

A drive fan (12) is provided in the housing (13).
A generator (17) connected to the rotating shaft (16) is provided.

The inner surface of the air guide tube (4), each fan (7) (11) (1
2) and the outer surface of the housing (13) are made of a material having a minimum friction with air, and are finished smoothly so as to minimize irregularities.

An accommodation space (19) is formed by providing a flat box-shaped bottom plate (18) integrally with a small gap on the lower surface of the substrate (2).

Immediately below the thrust bearing (3), a downwardly directed support (20) is projected from the lower surface of the bottom plate (18), and a radial ball bearing provided in the support (20) is provided.
(21) supports a portion slightly below the upper end of the support shaft (1).

The leads (22) and (2) derived from the generator (17)
The brush (23) (2) passes through the accommodation space (19) and
3) is a slip ring (24) provided on the outer surface of the support shaft (1).
Are in elastic contact. Each slip ring (24)
It is connected to a transmission line (25) that passes through the inside of the support shaft (1).

Next, the operation will be described. The substrate (2)
Because it can rotate around the spindle (1),
Alternatively, by appropriate detection / control means, the wind guide tube (4) is turned so that the front face always faces upwind.

When an airflow flows into the baffle 4, the driven fan 7 is rotated according to the wind speed.

As described above, the blade of the driven fan (7)
(6) Since the pitch, size, shape, positive area, etc. of the blades constituting the suction fan (11) are determined as required, the suction fan (11) is rotated by the driven fan (7), (11) sucks outside air at a speed higher than the wind flowing into the air guide tube (4).

[0033] Therefore, the outside air is introduced into the baffle 4 at a higher speed than the outside natural wind, and the driving fan (12) is rotated by the accelerated and increased pressure airflow. Becomes

Therefore, the efficiency of wind energy recovery by the driving fan (12) is considerably higher than that of a conventional wind turbine.

FIG. 2 shows a second embodiment of the present invention. In FIG. 2, the air guide tube (26) is a trumpet-shaped member that gently expands forward, and the other parts are the same as those in FIG. 1. Therefore, the same portions as those in FIG. 1 are denoted by the same reference numerals.

As shown in FIG. 2, the airflow flowing into the baffle tube (26) is larger than that in the embodiment shown in FIG.
Since the pressure is further increased and the speed is increased, the drive efficiency of the drive fan (12) is higher than that of FIG.

FIG. 3 shows an example in which a driven disk (28) and a suction fan (29) are integrally formed by punching a metal disk (27).

A plurality of cut-and-raised pieces (28a) having the same dimensions and the same inclination, which are arranged in the circumferential direction, are provided at regular intervals around the center of the disk (27) to form a driven fan (28). Furthermore, a suction fan (29) is formed by providing a large number of slightly raising and lowering pieces (29a) which are slightly larger than the above-mentioned raising and lowering pieces (28a) in the circumferential direction.

Since they can be formed at once by pressing,
Productivity increases.

It is also possible to integrally mold with plastic.

FIG. 4 shows that a suction fan (30) and a drive fan (31) located in the outer peripheral direction of the suction fan (30) are connected with a connecting shaft (32).
It is one.

[0042]

According to the present invention, the outer diameter of the baffle can be increased with a large amount of air, and the driving fan can be rotated at a high speed, compared with a conventional open-type propeller-type wind power generator. It is possible to effectively collect wind power and to perform power generation with high efficiency.

[Brief description of the drawings]

FIG. 1 is a vertical sectional side view conceptually showing a first embodiment of a wind turbine generator of the present invention.

FIG. 2 is a view similar to FIG. 1 showing a second embodiment.

FIG. 3 is a perspective view showing different examples of a driven fan and a suction fan.

FIG. 4 is a perspective view showing still another example of a driven fan and a suction fan.

[Explanation of symbols]

 (1) Support shaft (2) Substrate (3) Thrust bearing (4) Wind guide tube (5) Support piece (6) Blade (7) Driven fan (8) Rotary shaft (9) Support rod (10) Bearing (11) ) Suction fan (12) Drive fan (13) Housing (13a) Rear end (14) Blade (15) Support rod (16) Rotating shaft (17) Generator (18) Bottom plate (19) Storage space (20) Support Cylinder (21) Radial ball bearing (22) Conductor (23) Brush (24) Slip ring (25) Transmission line (26) Wind guide cylinder (27) Disk (28) Driven fan (28a) Cut and raised piece (29) Suction fan (29a) Cut and rise (30) Suction fan (31) Drive fan (32) Connecting shaft

Claims (10)

[Claims] 1. A driven fan that is rotated by an inflow air flow, a suction fan that is rotated by the driven fan, and a suction fan that is rotated by the driven fan and is provided at an axial front end of a cylindrical air guide tube. A wind power generator, wherein a drive fan for driving a generator is disposed at a rear end. 2. The wind power generator according to claim 1, wherein the suction fan is provided integrally with the driven fan. 3. The wind power generator according to claim 1, wherein the suction fan is provided integrally at a radially outer end of the driven fan. 4. The wind power generator according to claim 1, wherein the driven fan is of a propeller type. 5. The driven fan and the suction fan are formed of blades which are formed by cutting and raising in a circumferential direction around the center of the disk and inclined in a certain direction.
5. The wind power generator according to any one of 4. 6. The wind power generator according to claim 1, wherein the suction fan is attached to a rotating shaft integral with the driven fan. 7. The wind power generator according to claim 1, wherein the wind guide cylinder is formed of a cylinder having a constant diameter. 8. The wind turbine generator according to claim 1, wherein the wind guide tube has a trumpet shape expanding forward. 9. The wind power generator according to claim 1, wherein the wind guide tube and all the fans are mounted on a substrate which can be turned around a vertical axis. 10. The wind power generator according to claim 9, wherein the generator and the transmission line by the generator are also mounted on the substrate.