WO2005064153A1

WO2005064153A1 - Wind turbine device

Info

Publication number: WO2005064153A1
Application number: PCT/JP2004/019816
Authority: WO
Inventors: Hironari Ogata; Kazunori Matsumoto
Original assignee: Matsushita Electric Industrial Co., Ltd.
Priority date: 2003-12-26
Filing date: 2004-12-27
Publication date: 2005-07-14
Also published as: MY137900A; CN100392237C; CN1780981A; CA2526399A1; JP4085977B2; JP2005188454A

Abstract

A wind turbine device where over speeding of a wind wheel with the increase in natural wind is prevented by a load produced by a fan based on a rotational force of the wind wheel. The wind turbine device has a wind wheel rotating while catching natural wind and a storage battery converting rotational energy into electrical energy to store it. The wind turbine device further has a centrifugal blade wheel provided coaxial with the rotation shaft of the wind wheel, and the centrifugal blade wheel has a casing, not catching natural wind, to form a fan.

Description

Specification

Wind power generator

Technical field

The present invention relates to a wind power generation device using natural energy. More specifically, the present invention relates to a wind turbine protection device in a strong wind. Background art

Conventionally, as a device for protecting a windmill in the case of this kind of strong wind, a variable pitch wind power generation device in which a pitch of a rotor blade is changed according to a wind pressure applied to the windmill is known. There are also wind turbines suspended from a pivot in accordance with the wind pressure received by the wind turbine, and a suspended fixed-pitch lateral displacement wind power generator in which the generator swings. One of these methods uses a direction plate and an output adjustment spring attached to it to displace the windmill speed according to the wind pressure so that almost constant wind is applied to the windmill regardless of the wind speed. It is to let. In the event of a storm, the wind turbines are displaced just beside the direction of the wind to maintain the position with the least resistance to protect the wind turbine. Such a method is disclosed in, for example, Japanese Patent Application Laid-Open No. 58-128471. On the other hand, in the brake disc system, in which a brake disc is installed in front of the propeller on the propeller shaft, friction is generated by pressing the brake disc in strong winds to perform braking. Such a method is disclosed in, for example, Japanese Patent Application Laid-Open No. 56-77573. Disclosure of the invention

The wind turbine is

A windmill that rotates by catching the natural wind A wind power generator having a storage battery that converts and stores energy into energy, a centrifugal impeller provided coaxially with a rotation axis of the wind turbine, and the centrifugal impeller has a casing that does not catch natural wind. Is formed. Brief Description of Drawings

FIG. 1 is a perspective view of the overall outline of a wind turbine generator according to one embodiment of the present invention.

FIG. 2 is a perspective view of a fan component of the wind turbine generator according to one embodiment of the present invention.

FIG. 3A is a front view of a wind turbine generator according to one embodiment of the present invention. FIG. 3B is a partial cross-sectional view of the multi-blade impeller in front of the wind turbine generator according to one embodiment of the present invention.

FIG. 3C is a partial cross-sectional view of the windmill in front of the wind turbine generator according to one embodiment of the present invention.

FIG. 4 is a diagram showing a characteristic table of the natural wind speed and the rotation speed of the windmill and the fan of the wind turbine generator according to one embodiment of the present invention.

FIG. 5 is a general perspective view of a propeller fan windmill of the wind turbine generator according to one embodiment of the present invention.

FIG. 6 is a diagram showing a cooling part of the bearing device of the wind turbine generator according to one embodiment of the present invention.

FIG. 7 is a diagram showing a configuration portion of a tongue portion of the wind turbine generator according to one embodiment of the present invention.

FIG. 8 is an overall front view of the exhaust heat ventilation passage of the wind turbine generator according to one embodiment of the present invention. BEST MODE FOR CARRYING OUT THE INVENTION In the above-mentioned conventional wind power generator, the wind speed of natural wind is strong. For example, when the wind speed during a typhoon is 60 mZs, the windmill rotates at high speed due to strong wind. As a result, the strength of the wind turbine blades repeats mechanical vibration and pulsation at high speeds, resulting in blade material deterioration and cracking. Finally, there is a problem that the blade may be damaged if the internal stress of the material exceeds the breaking point. For this reason, many measures have been taken in the past, and a variable pitch type, in which the rotor blades change during strong winds, is known. However, this method requires many auxiliary equipment such as a rotary transmission mechanism. There is also a suspension-type fixed-pitch method, but this method also has a rotation transmission mechanism and a panel mechanism, and requires many additional facilities. In addition, the brake disk method requires a spring mechanism, and this method has a new problem such as breakage of a friction portion because braking is performed by frictional force. There is also a system that applies electromagnetic brakes to prevent the blades from rotating.

Such a conventional method has a problem that the structure is complicated, the equipment cost is high, and the complicated structure requires a large number of man-hours, such as requiring regular maintenance to secure functions. In addition, when the electromagnetic brake is applied to brake the battery, if there is a failure in the battery, there is also a problem with certainty that the wind turbine cannot be stopped.

Accordingly, the present invention is to solve such a conventional problem, and an object of the present invention is to provide a simple, reliable and inexpensive wind turbine protection device having a long maintenance cycle.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

An embodiment of a streetlight device using a wind power generator according to the present invention will be described with reference to the drawings.

FIG. 1 is a perspective view of the overall outline of a wind turbine generator according to one embodiment of the present invention. FIG. 2 is a perspective view of a fan component of the wind turbine generator according to one embodiment of the present invention. FIG. 3A shows the correctness of a wind power generator according to one embodiment of the present invention. FIG. FIG. 3B is a partial cross-sectional view of the multi-blade impeller in front of the wind turbine generator according to one embodiment of the present invention. FIG. 3C is a partial cross-sectional view of a windmill in front of a wind turbine generator according to one embodiment of the present invention. FIG. 4 is a characteristic table of the natural wind speed and the rotation speed of the windmill and the fan of the wind turbine generator according to one embodiment of the present invention. FIG. 5 is an overall schematic perspective view of a propeller fan windmill of a wind turbine generator according to one embodiment of the present invention. FIG. 6 is a diagram showing a cooling part of a bearing device of a wind turbine generator according to one embodiment of the present invention. FIG. 7 is a diagram showing the configuration of the tongue of the wind turbine generator according to one embodiment of the present invention. FIG. 8 is an overall front view of the exhaust heat ventilation passage of the wind turbine generator according to one embodiment of the present invention.

(Example 1)

The overall configuration of the wind power generator according to the present embodiment includes a wind turbine 1, a fan 20 for preventing over rotation of the wind turbine 1, a power generator 30 for converting the rotational energy of the wind turbine 1 into electric energy, and a power generator 30. A power storage device 40 for storing the electric power generated by the device 30, an illumination device 50 for lighting using the power stored in the power storage device 40, and the like are provided. The windmill 1, the fan 20, the power generator 30, the power storage device 40, and the lighting device 50 are each held at a predetermined height from the ground so as to be sandwiched between the two poles 2. The pole 2 is installed on the ground by the mounting base 3. The mounting base 3 is installed by a fixture such as an anchor port.

The fan casing 21 is formed by a top plate 22, a side plate 23, and a bottom plate 24. The fan 20 has a suction port 10 arranged at the end of the hollow pole 2, and has a suction chamber 11 and an orifice 12 between the suction port 10 and the top plate 22, a multi-blade type. It is composed of an impeller 4, a tongue 13 and a fan discharge port 14. The multi-blade impeller 4 is coaxially connected to the upper end of the rotating shaft 7 of the wind turbine 1. Note that the multi-blade impeller 4 is an example of a centrifugal impeller, and the centrifugal impeller is not limited to the multi-blade impeller 4. Also, The multi-blade impeller 4, which is a centrifugal impeller, is formed by a fan with casing so as not to catch natural wind. The direction of the wind of the blades of the multi-blade impeller 4 is set in the same direction as the direction in which the wind turbine 1 rotates by receiving the wind, and the lower end of the wind turbine 1 It is connected coaxially with the rotation axis of the machine 5. The wind turbine 1 includes a rotating shaft 7 to which the generator 5 is connected via a joint 6, and a plurality of wind turbine blades 8 arranged around the rotating shaft 7. Bearings 9 are provided on the upper and lower portions of the rotating shaft 7, respectively. The rotating shaft 7 is held by each bearing 9, and the bearing 9 is provided inside the fan 20 and inside the power generator 30, respectively.

A lighting device 50 is attached to a lower portion of the power generating device 30, and a lighting device 15 is provided therein.

A control box 16 and a lead storage battery 17 are provided inside the power storage device 40, and can be turned on and off automatically by an illuminance sensor. The power storage device 40 has an inspection door 18 for performing maintenance.

The power generation device 30 and the lighting device 50 are electrically connected to the power storage device 40 via the control box 16. Electric power generated by the rotational energy of the wind turbine 1 is stored in the power storage device 40, and the power stored in the power storage device 40 is supplied to the lighting device 50, and the lighting 15 is turned on.

FIG. 4 shows the characteristics of the present embodiment when the wind turbine 1 is operated alone, when the fan 20 is operated alone, and when the wind turbine 1 and the fan 20 are operated integrally. Figure 4 shows the characteristic table of the natural wind speed and the rotation speed of the windmill and the fan. Curve 101 indicates the operating characteristics of the wind turbine 1 alone, and the rotation speed of the wind turbine 1 increases almost in proportion to the increase in natural wind speed. The curve 102 is the load characteristic of the fan 20 alone, and the rotation speed of the fan 20 increases in proportion to the square of the natural wind speed as the natural wind speed increases. It has increased. Here, a curve 103 which is an operation characteristic when the fan 20 is attached to the wind turbine 1 is an operation characteristic obtained by subtracting the curve 102 from the curve 101, and shows an actual operation state. Prevention of excessive rotation of the wind turbine 1 will be described below for the case of a wind speed of 15 mZs as the upper limit of the normal wind speed and the case of a wind speed of 60 m / s during a typhoon.

The upper limit of the normal wind speed was set to 15 mZ s.The rated wind speed of the wind power generator was set to 15 m // s, and the generated power at wind speeds exceeding that was 40 m / s. The upper limit is set at 15 m / s because power is not stored in the battery. Here, as shown by the curve 103, at the upper limit of the normal wind speed of 15 mZs, the single operation of the wind turbine 1 is approximately 100 rZmin, and when the fan 20 is installed, 8 00 r / min. Therefore, the rotation speed suppression rate at which the rotation speed of the windmill 1 is reduced by providing the fan 20 is 20%. On the other hand, when the wind speed during a typhoon is 60 mZ s, the single operation of the wind turbine 1 is about 4400 rZin, and when the fan 20 is installed, it is about 2150 r / in. . Therefore, the rotation speed suppression rate became 51%, and the rotation speed suppression rate was greatly reduced. This is because the characteristics of the wind turbine 1 increase the rotation speed in proportion to the wind speed, whereas the characteristics of the fan 20 increase the rotation speed by the square of the increase in the wind speed. As a result, when the windmill 1 and the fan 20 are coaxially connected, the rotation of the windmill 1 is less suppressed in the low wind speed range of the fan 20 and is suppressed in the high wind speed range. For this reason, as the natural wind speed becomes stronger, the rotation speed of the wind turbine 1 is greatly suppressed to prevent the wind turbine 1 from becoming over-rotated.

Hereinafter, another embodiment of the wind turbine generator of the present invention will be described with reference to the drawings. The components having the same functions as those of the above-described embodiment are denoted by the same reference numerals, and description thereof will be omitted. In addition, other configurations not shown in the following embodiments have the same configurations as the above-described embodiments.

The power storage device 40 can use capacitors in addition to lead-acid batteries. it can.

(Example 2)

FIG. 5 is an overall schematic perspective view of a propeller fan windmill of the wind turbine generator according to the second embodiment of the present invention.

As shown in FIG. 5, the wind turbine generator according to the present embodiment uses a horizontal axis wind turbine, and includes a multi-blade impeller 4 coaxially with the rotation axis 7 of the wind turbine 1. The rotating shaft 7 is connected to the generator 5 via a joint 6. Further, the multi-blade impeller 4 is provided inside the fan 20, and has a structure in which the air sucked from the suction port 10 is discharged by the multi-blade impeller 4 to the fan discharge port 14.

Similarly to the embodiment shown in FIG. 1, in this embodiment, when the wind turbine 1 receives a strong wind, the multi-blade impeller 4, which rotates coaxially, becomes a resistance and prevents over-rotation. Can be.

(Example 3)

FIG. 6 is a view of a cooling portion of a bearing device of the wind turbine generator according to the third embodiment of the present invention.

As shown in FIG. 6, the bearing 9 is provided in a ventilation path in a fan 20 provided on an upper part of the wind power generator.

In this configuration, the air stored in the suction chamber 11 as a ventilation path in the two poles 2 is discharged to the outside by the multi-blade impeller 4 through the orifice 12.

This makes it possible to apply the discharge flow to the bearing 9 and prevent a rise in temperature.

(Example 4)

FIG. 7 is a diagram of a tongue part of a wind turbine generator according to a fourth embodiment of the present invention.

As shown in Fig. 7, a fan provided at the top of the above-mentioned wind power generator The tongue 13 mounted inside 20 is in the position 13 B where it does not function as a tongue when the normal wind speed is 15 ms or less, and the position 13 A when the strong wind exceeds 15 m / s. Variable structure.

In this configuration, the air in the fan 20 is pumped out in the centrifugal direction by the rotation of the multi-blade impeller 4, and is discharged from the fan discharge port 14 to the outside through the tongue 13. .

By changing the tongue 13, the fan characteristics of the fan 20 can be adjusted, the load up to an arbitrary wind speed range can be reduced, and the decrease in power generation caused by the fan 20 can be reduced.

Thus, the gap between the multi-blade impeller 4, which is a centrifugal impeller, and the tongue 13 does not have a tongue shape up to the power generation wind speed range of the windmill, and when the power generation wind speed range is reached, the tongue is formed in the casing. A tongue forming means having a shape is formed.

(Example 5)

FIG. 8 is an overall front view of the exhaust heat ventilation passage of the wind turbine generator according to the fifth embodiment of the present invention.

As shown in FIG. 8, the configuration is the same as that of the first embodiment shown in FIG.

In the above configuration, the heat generated by the generator 5, the lighting 15, the control box 16 and the lead-acid battery 17 is transferred to the fan installed in the upper part of the wind power generator by using the inside of the two poles 2 as a wind path. It is discharged out of the device by 20. This makes it possible to discharge the heat generated inside the wind turbine to the outside, and to prevent a rise in the temperature inside the turbine, which becomes high.

As described above, the present invention provides a wind turbine that includes a wind turbine that rotates by capturing natural wind and a storage battery that converts the rotational energy into electric energy and stores the electric energy. A fan having a centrifugal impeller and a casing in which the centrifugal impeller does not catch natural wind Is formed. Thus, the load generated by the fan based on the rotational force of the windmill prevents overwind of the windmill due to an increase in natural wind.

Further, as described above, according to the present invention, the fan has the centrifugal impeller, the tongue, and the casing, and the shape of the tongue is changed. By changing the fan characteristics, the load applied to the windmill is reduced. Adjustment is also possible.

Further, as described above, according to the present invention, in the above-described wind power generator, the gap between the centrifugal impeller and the tongue does not have a tongue shape up to the power generation wind speed range of the wind turbine, and enters the power generation wind speed range. It was also shown that the casing had a tongue forming means having a tongue shape in the casing. In this way, the fan load is reduced during natural wind speeds where the power generated by the windmill can be used, and the fan load becomes heavy at higher natural wind speeds. Adjustable in the part.

Further, as described above, the present invention provides the above-described wind turbine generator, wherein the bearing of the wind turbine is arranged in the ventilation path near the discharge port of the centrifugal impeller inside the casing and cooled by the discharge flow of the fan. It also shows that it has a configuration. By doing so, the bearing temperature rises as the fan speed increases, so the bearings also provide a fan air intake path.

Further, as described above, in the above-described wind turbine generator, the rotation direction of the centrifugal impeller is such that the blade direction of the centrifugal impeller is forward with respect to the direction in which the wind turbine rotates by receiving natural wind. It also indicates that the wind turbine and the fan blades are arranged in such a way that the rotation direction is adjusted to prevent reverse load.

Further, according to the present invention, in the above-described wind turbine generator, the material of the centrifugal impeller can be made of aluminum.

In the wind turbine generator of the present invention, the centrifugal impeller may be a multi-blade impeller. It is also possible to configure with.

Further, the wind power generator of the present invention includes a heating element such as a storage battery, an inverter, a generator and a control device, and a connecting pole for holding the windmill and the heating element. The connecting pole has a hollow structure and has a heating element. Form a communicating ventilation path. Then, it was shown that the ventilation path was connected to the fan inlet, and the heat generated by the heating element was exhausted from the fan. In this way, when exhausting the heat generated from the heating element, it is possible to exhaust from a fan that does not catch natural wind so as not to be affected by the outdoors such as rainwater.

By the way, the blade of the wind turbine 1 of the present invention may be other than the Savonius and the propeller, and the shape of the blade is not limited as long as it rotates by natural wind.

The material of the centrifugal impeller can be made of aluminum. .

Further, in the above description, the protection of the blades of the wind turbine in the case of receiving a natural wind is described. However, the present invention is also applicable to a device that rotates by a water flow or other fluid.

As is apparent from the above description, according to the present invention, in the case of a strong wind such as a typhoon, the structure is simplified because the braking is automatically performed by the braking force of the fan. Becomes unnecessary. Further, according to the present invention, it is possible to provide a protection device for a wind turbine having a simple structure, a low facility cost, a small number of regular maintenance operations for securing a braking function, and a long maintenance cycle.

It also has the effect of utilizing the fan characteristics of the fan to connect the hollow structure of the support pipe to the heat generated by the storage battery, generator, inverter, control equipment, etc., and exhausting it. Industrial applicability

The present invention is simple, reliable and inexpensive, and has a long maintenance cycle. A wind power generator having a car protection device is provided. The present invention can be applied to protection of the blades of a windmill when receiving a natural wind, and protection of a windmill or other fluid that is rotated by a fluid.

Claims

The scope of the claims

1. In a wind turbine that has a wind turbine that catches natural wind and rotates, and a storage battery that converts the rotation energy into electric energy and stores it, a centrifugal impeller provided coaxially with the rotation axis of the wind turbine is used. A wind power generator, wherein the centrifugal impeller forms a fan having casing that does not catch natural wind.

2. The wind power generator according to claim 1, wherein the fan has the centrifugal impeller, a tongue, and a casing, and the shape of the tongue changes.

3. The gap between the centrifugal impeller and the tongue portion does not have a tongue shape up to the power generation wind speed region of the wind turbine, and has a tongue portion forming means in the casing when entering the power generation wind speed region. Item 2. The wind power generator according to Item 2.

4. The bearing of the windmill is disposed in the ventilation passage near the discharge port of the centrifugal impeller, which is located inside the casing,

The wind power generator according to claim 1, wherein the bearing is cooled by a discharge flow of the fan.

5. The wind turbine generator according to claim 1, wherein the direction of rotation of the centrifugal impeller is such that a blade direction of the centrifugal impeller is disposed forward with respect to a direction in which the windmill rotates by receiving natural wind.

6. The wind power generator according to claim 1, wherein a material of the centrifugal impeller is aluminum.

7. The wind turbine generator according to any one of claims 1 to 6, wherein the centrifugal impeller is a multi-blade impeller.

8. A heating element such as the storage battery, the inverter, the generator and the control device, and a connection pole for holding the windmill and the heating element,

2. The connecting pole has a hollow structure, forms a ventilation path communicating with the heating element, connects the ventilation path to a suction port of the fan, and exhausts heat generated by the heating element from the fan. A wind power generator as described.