JP2006220028A - Wind power generation device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce a size and a cost of a wind power generation device automatically applying braking force upon excessive rotation of a rotary shaft and applying the braking force to the rotary shaft also in an emergency such as power failure. <P>SOLUTION: The wind power generation device comprises a brake plate rotating with the rotary shaft, a brake arm applying the braking force to the brake plate, a manual operation implement for manually operating the brake arm, an electric actuator automatically operating the brake arm according to wind velocity, and a coupling mechanism operatively coupling the manual operation implement and the electric actuator to the brake arm in a parallel state. The coupling mechanism is constructed to transmit movement of one of the manual operation implement and the electric actuator to the brake arm while not transmitting to the other. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a wind power generator that converts wind energy into electric energy, and more particularly to a wind power generator that includes Darrieus blades.

  As a type of wind power generator that converts wind energy into electrical energy, the rotating shaft that supports the Darrieus wing is supported so as to be rotatable about the axis along a substantially vertical direction, and the rotation of the rotating shaft is transmitted to the generator. Thus, a Darrieus-type wind power generator configured to convert wind energy into electric energy has been proposed.

In such a Darrieus-type wind power generator, in order to automatically prevent excessive rotation of the Darrieus blade, it has been proposed to provide an electric brake in a transmission path from the rotating shaft to the generator (Patent Document 1). reference).
In detail, the conventional wind power generator is configured such that a braking force is constantly applied by a spring, and when the brake is released, the braking force by the spring is relaxed by pressure oil from a hydraulic pump driven by the electric motor. It has.

  In such a conventional wind power generator, by providing the electric brake, excessive rotation of the Darius blade is automatically prevented, and in the event of a power failure, the rotation of the Darius blade is stopped by the spring. However, it has the following disadvantages.

That is, since the electric motor has a configuration in which a braking force is applied by a spring, a spring having a considerably large urging force must be used, and an expansion / contraction stroke of the spring must be ensured.
Therefore, there is a problem that such an electric motor causes an increase in size and cost.

Further, the Darrieus wind power generator is provided with a transmission mechanism that transmits the rotation of the rotating shaft to the input portion of the generator.
A wind power generation apparatus having various transmission mechanisms such as a gear type and a pulley type has been proposed as the transmission mechanism. When the transmission mechanism includes a gear, a structure for supplying lubricating oil to a meshing portion of the gear is proposed. Is required.
By the way, such a wind power generator is often installed in a place that cannot be easily accessed, such as the rooftop of a building or the upper part of a steel tower, and it is desired that the installation is as maintenance-free as possible after installation.
Therefore, when the transmission mechanism includes a gear, it is desirable that the lubricating oil supply structure to the meshing portion of the gear be as maintenance-free as possible. However, conventionally, sufficient consideration has been given to this aspect. It wasn't.
JP 58-57083 A

The present invention has been made in view of the above prior art, and automatically applies a braking force to the rotating shaft when the Darrieus blade is excessively rotated, and also applies a braking force to the rotating shaft in an emergency such as a power failure. An object of the present invention is to provide a wind power generator that can be reduced in size and cost.
Furthermore, the present invention provides a wind turbine generator having a simple structure capable of supplying lubricating oil to a meshing portion of a gear constituting a transmission mechanism from a rotating shaft to a generator as much as possible without maintenance. And

  In order to achieve the above object, the present invention provides a wind power generator configured to transmit rotation about an axis of a rotary shaft supporting a Darrieus wing to a generator, wherein the braking is performed integrally with the rotary shaft. A brake arm for applying a braking force to the brake plate, a manual operating tool for manually operating the brake arm, an electric actuator for automatically operating the brake arm according to wind speed, and the manual operation And a connecting mechanism for operatively connecting the tool and the electric actuator to the brake arm in a parallel state, wherein the connecting mechanism transmits one operation of the manual operating tool and the electric actuator to the brake arm while the other. Provides a wind turbine generator that is configured not to communicate.

  Preferably, the electric actuator is operatively connected to the brake arm via a worm and rack mechanism.

  Preferably, an urging member that holds the brake arm in a brake released state can be further provided in a state where an operating force by the manual operating tool or the electric actuator is not applied.

In the various aspects, the connection mechanism is a push link having a manual operation tool connection piece operatively connected to the manual operation tool and an electric actuator connection piece operatively connected to the electric actuator, and a push fulcrum. A push link that is swingable about an axis, and the push link so that the brake arm is brought into a brake operating state when the push link swings in a brake operating direction on one side around the pressing fulcrum shaft. And a driven link connecting the brake arms.
In this aspect, preferably, the manual operating tool and the manual operating tool connecting piece are arranged such that the push link swings in the brake operating direction by the operation of the manual operating tool, and the brake operating direction of the push link is The swinging motion is connected so as not to be transmitted to the manual operation tool.
Further, the electric actuator and the electric actuator connecting piece are configured such that the push link is swung in the brake operation direction by the operation of the electric actuator, and the swing operation of the push link in the brake operation direction is the electric actuator. It is connected so that it is not transmitted to.

  Further, the present invention is a wind power generator configured to transmit rotation about an axis of a rotary shaft supporting a Darrieus wing to a generator via a transmission mechanism in order to achieve the above object. The transmission mechanism includes a pair of gears that mesh with each other, and at least one of the pair of gears includes an oil pocket portion that can retain lubricating oil and a communication portion that communicates the oil pocket portion with the gear meshing portion. Provided is a wind power generator provided.

  In order to achieve the above object, the present invention is a wind turbine generator configured to transmit rotation about an axis of a rotating shaft supporting a Darrieus wing to a generator via a transmission mechanism, The transmission mechanism is a cover member that is coupled to a pair of gears that mesh with each other and an upper surface of at least one of the pair of gears, and that covers a space for accommodating an oil-impregnated member between the upper surfaces of the gears A wind turbine generator configured to open the oil-impregnated member housing space toward the gear meshing portion.

  In an aspect in which the rotary shaft is a hollow shaft that is supported by a support shaft that is erected along a substantially vertical direction and is rotatably supported around the axis via a bearing member, preferably, the bearing member is an internal It can be a ball bearing in which lubricating oil is enclosed.

According to the wind turbine generator according to one aspect of the present invention, the brake plate that rotates integrally with the rotating shaft, the brake arm that applies a braking force to the brake plate, and the manual operation for manually operating the brake arm An electric actuator that automatically operates the brake arm according to wind speed, and a connection mechanism that operably connects the manual operation tool and the electric actuator to the brake arm in a parallel state, the connection mechanism including the manual operation Since the operation tool and one of the electric actuators are transmitted to the brake arm but not to the other, the excessive rotation of the rotating shaft is automatically prevented during a strong wind and power failure. In an emergency such as time, the rotation of the rotating shaft can be stopped by human operation, thereby improving safety.
Furthermore, since both the manual operation tool and the electric actuator are operatively connected to the brake arm by a single connection mechanism, a manual operation path for operatively connecting the manual operation tool to the brake arm and an electric actuator to the brake arm are operatively connected. Compared with the aspect which provides the automatic operation path | route which carries out independently, cost reduction can be aimed at.

Further, if the electric actuator is configured to be operatively connected to the brake arm via a worm and rack mechanism, even if the electric actuator is stopped after the electric actuator is operated according to the wind speed, The brake arm can be held in a brake operating state.
Therefore, for example, even when the electric actuator is deenergized for some reason during a strong wind, the brake arm can be maintained in a brake operating state, thereby further improving safety.

  Furthermore, according to the wind power generator according to another aspect of the present invention, at least one of a pair of gears constituting a transmission mechanism from the rotating shaft to the generator, an oil pocket portion capable of retaining lubricating oil, and the oil pocket Since the communication portion for communicating the portion with the gear meshing portion is provided, the lubricating oil can be supplied to the meshing portions of the pair of gears as much as possible without maintenance.

  Further, according to the wind turbine generator according to still another aspect of the present invention, the cover member is coupled to at least one upper surface of the pair of gears constituting the transmission mechanism from the rotating shaft to the generator, A cover member that defines a space for accommodating the oil-impregnated member between the upper surface and the cover member is configured to open the oil-impregnated member accommodating space toward the gear meshing portion. Lubricating oil supply to the meshing site can be performed as maintenance-free as possible.

Hereinafter, a preferred embodiment of a wind turbine generator according to the present invention will be described with reference to the accompanying drawings.
In FIG. 1, the schematic front view of the wind power generator 1 which concerns on this Embodiment is shown.

  As shown in FIG. 1, the wind turbine generator 1 includes a support shaft 10 erected along a substantially vertical direction at an installation location, and a hollow shaft that is extrapolated and supported by the support shaft 10 so as to be relatively rotatable about an axis. The rotating shaft 20, a plurality of Darrieus blades 30 connected to the rotating shaft 20 (three in the illustrated form at intervals of 120 °), the generator 40, and the rotation of the rotating shaft 20 are controlled by the generator 40. And a transmission mechanism 50 for transmission to the input unit.

In the present embodiment, the wind power generator 1 includes a power generation box 60 that supports the generator 40 in addition to the above-described configuration.
The power generation box 60 includes a lower plate 61 placed on an installation surface provided on a rooftop of a building, a tower, or a power transmission tower, and an upper plate 62 spaced upward from the lower plate 61.
In the present embodiment, the support shaft 10 is erected on the lower plate 61, and the upper plate 62 is supported on the support shaft 10.

2 to 4 show enlarged longitudinal sectional views of the II part, the III part, and the IV part in FIG. 1, respectively.
The rotating shaft 20 has a plurality of hollow rotating members that are separable in the axial direction and are joined to each other so as not to rotate relative to each other. In the state where the plurality of hollow rotating members are joined, The lower end portions are configured to connect and support the upper end portion and the lower end portion of the Darrieus wing 30, respectively.

  In the present embodiment, as shown in FIG. 1, the rotary shaft 20 connects and supports the first hollow rotating member 21 that connects and supports the lower end portion of the Darrieus blade 30 and the upper end portion of the Darius blade 30. The second hollow rotating member 22 has a two-part structure having a second hollow rotating member 22 that is separable from the first hollow rotating member 21 and is joined so as not to rotate relative to the axis.

In addition to the above configuration, the wind turbine generator 1 according to the present embodiment includes a first Savonius blade 71 supported by the first hollow rotating member 21 and a second hollow rotating member 22 supported by the second hollow rotating member 22. 2 Savonius wings 72.
The Darrieus blade 30 is configured to generate all or most of the driving force that rotates the rotating shaft about the axis during power generation operation, whereas the first and second Savonius blades 71, 72 is provided to generate an auxiliary driving force when starting to rotate the rotary shaft 20 about the axis at the start (power generation start).

As shown in FIG. 1 to FIG. 3, the rotary shaft 20 has a top end portion located above the top end portion of the support shaft 10 and a pair of a lower bearing member 15 and an upper bearing member 16. The support shaft 10 is supported by extrapolation so as to be rotatable about the axis.
In such a configuration, after the support shaft 10 is erected, the assembly work efficiency when the rotary shaft 20 is extrapolated to the support shaft can be improved.

That is, in the conventional configuration in which the support shaft is inserted over the entire length of the rotation shaft, when the support shaft is erected, when the rotation shaft is lifted and extrapolated to the support shaft, the lower end of the rotation shaft The part must be lifted up to the height H (see FIG. 1) of the upper end of the rotating shaft after assembly.
On the other hand, in the present embodiment, the lower end portion of the rotary shaft 20 may be lifted up to the height h (h <H) of the upper end portion of the support shaft 10, and therefore the assembly work efficiency is improved. be able to.

Furthermore, in the wind turbine generator according to the present embodiment, the lower part of the rotating shaft 20 is supported by the support shaft 10 by the lower bearing member 15 and the upper bearing member 16.
Accordingly, a connecting member such as a wire stretched between the upper end portion of the rotating shaft and the installation surface can be basically eliminated, and thus, compared with a type of wind power generator that requires the connecting member. As a result, the installation space can be reduced and the assembly work efficiency can be improved due to the unnecessary installation work of the connecting member.

  In the present embodiment, since the rotary shaft 20 is constituted by a plurality of hollow rotary members joined together, the rotary shaft to the installation position is compared with the rotary shaft formed by a single member. The conveyance work can be facilitated.

Further, in the present embodiment, as shown in FIGS. 2 and 3, the lower bearing member 15 and the upper bearing member 16 are both arranged between the first hollow rotating member 21 and the support shaft 10. It is installed.
That is, in the present embodiment, only the first hollow rotating member 21 is supported by the support shaft 10, and the second hollow rotating member 22 is simply joined to the first hollow rotating member 21, The support shaft 10 is free.
Accordingly, the first hollow rotating member 21 is extrapolated and supported by the support shaft 10 through the lower bearing member 15 and the upper bearing member 16, and then the second hollow rotating member 22 is moved to the first hollow rotating member. Assembly work can be carried out simply by joining to 21.

Here, a support structure of the first hollow rotating member 21 by the lower bearing member 15 and the upper bearing member 16 will be described.
First, the lower bearing member 15 will be described.
As shown in FIG. 2, the support shaft 10 includes a support shaft main body 11 and an extrapolation member 12 that is extrapolated to the lower region of the support shaft main body 11 so as not to be relatively rotatable.

  In the present embodiment, the support shaft main body 11 has a large diameter portion 11a extending between the lower plate 61 and the upper plate 62, and a small diameter portion 11b extending upward from the large diameter portion 11a. ing.

The extrapolation member 12 has a conical outer peripheral surface whose diameter is increased toward the lower side, and an upward stepped portion is formed on the conical outer peripheral surface.
In the present embodiment, the extrapolation member 12 is extrapolated to the lower end portion of the small diameter portion 11b.

On the other hand, as shown in FIG. 2, the first hollow rotating member 21 includes a hollow first rotating shaft main body 210 and a first lower flange that is extrapolated to the lower end portion of the first rotating shaft main body 210 so as not to be relatively rotatable. The member 211 includes a first lower flange member 211 to which the lower end of the Darrieus wing 30 is coupled.
A connecting member 215 and an output gear 51 that extend downward so as to surround the support shaft 10 are connected to the first lower flange member 211 so as not to be relatively rotatable.
An upward stepped portion is formed on the inner peripheral surface of the output gear 51.

In such a configuration, as shown in FIG. 2, the lower bearing member 15 includes an inner ring body locked to the upward stepped portion formed in the outer insertion member 12, and the output gear 51. An outer ring body locked to the upward stepped portion, and a rolling element disposed between the inner ring body and the outer ring body are provided.
That is, in the present embodiment, the lower bearing 15 is arranged between the extrapolation member 12 in the support shaft 10 and the output gear 51 that is connected to the first rotary shaft main body 210 so as not to be relatively rotatable. Thus, the lower end portion of the first hollow rotating member 21 is supported relative to the support shaft 10 so as to be relatively rotatable about the axis.

Next, the upper bearing member 16 will be described.
The upper bearing member 16 is inserted into the first hollow rotating member 21 from the upper end opening thereof with the first hollow rotating member 21 being supported by the support shaft 10 via the lower bearing member 15. It is disposed between the hollow rotating member 21 and the support shaft 10.

Specifically, as shown in FIG. 3, the support shaft 10 has an upward stepped portion on the outer peripheral surface of the upper end region of the support shaft main body 11.
On the other hand, the first hollow rotating member 21 rotates relative to the upper end region of the first rotating shaft main body 210 in addition to the first rotating shaft main body 210 and the first lower flange member 211 as shown in FIG. It has a first upper flange member 212 that is unsupported.

In such a configuration, as shown in FIG. 3, the upper bearing member 16 includes an inner ring body locked to the upward stepped portion formed in the support shaft main body 11, and an inner portion of the first rotating shaft main body 210. The outer ring body is in contact with the circumferential surface or the inner circumferential surface of the first upper flange member 212, and the rolling element is disposed between the inner ring body and the outer ring body.
Note that reference numeral 17 in FIG. 3 is connected to the upper end surface of the support shaft body 11 via a fastening member such as a bolt in order to prevent the inner ring body of the upper bearing member 16 from moving upward. It is a holding plate.

By providing the lower bearing member 15 and the upper bearing member 16, the first hollow rotating member 21 is extrapolated and supported by the support shaft 10, and then the second hollow rotating member 22 is moved to the first hollow. The rotating member 21 can be joined.
Preferably, both the lower bearing member 15 and the upper bearing member 16 may be ball bearings in which lubricating oil is sealed, whereby the lubricating oil for the lower bearing member 15 and the upper bearing member 16 is increased. Supply can be made maintenance-free as much as possible.

In the present embodiment, the first hollow rotating member 21 and the second hollow rotating member 22 are joined together by the first upper flange member 212 and the second hollow rotating member 21 in the first hollow rotating member 21. This is performed by fastening the second lower flange member 221 of the rotating member 22 with a fastening member such as a bolt (see FIG. 3).
That is, as shown in FIGS. 3 and 4, the second hollow rotating member 22 has a hollow second rotating shaft main body 220 and the second upper rotating shaft main body 220 so as to come into contact with the first upper flange member 212. The second lower flange member 221 is inserted so as to be relatively non-rotatable, the second upper flange member 222 is connected to the upper end surface of the second rotating shaft main body 210, and is connected to the upper surface of the second upper flange member 222. And a suspension bolt 224 connected to the connecting rod 223.

The second upper flange member 222 is provided to connect and support the upper end portion of the Darrieus blade 30.
The suspension bolt 224 is provided to lift the second hollow rotating member 22 during assembly.

Further, as shown in FIG. 4, the wind power generator 1 according to the present embodiment includes a support block 230 supported by the connecting rod 223 via a bearing member, in addition to the above configuration, as desired. A rain protection cover 240 covering the upper surface of the support block 230 may be provided.
The support block 230 is a member for mounting a tension bar provided so as to extend from a steel tower frame existing around the wind power generator 1 when the wind power generator 1 is installed inside the steel tower. Bolt holes for mounting (for example, three at 120 ° intervals) are formed on the outer peripheral surface. By providing such a configuration, the support strength of the rotating shaft 20 can be further improved.

Preferably, as shown in FIG. 1, the support shaft 10 has an upper end height h substantially equal to the height of the top 31 of the Darrieus wing 30 (the most projecting portion radially outward), and As shown in FIG. 3, the first and second hollow rotating members 21 and 22 are joined to each other at substantially the same height as the upper end of the support shaft 10.
By providing such a configuration, the support shaft 10, the first hollow rotating member 21, and the second hollow rotating member 22 can be easily transported and assembled while stabilizing the support of the rotating shaft 20. More can be planned.

As shown in FIG. 2, the generator 40 includes a main body portion 41 and an input portion 42 extending outward from the main body portion 41.
In the present embodiment, as shown in FIG. 2, the input portion 42 extends upward from the main body portion 41.
Such a generator 40 is supported by the power generation box 60 as described above.
Specifically, as shown in FIG. 2, the generator 40 is suspended and supported by the upper plate 62 of the power generation box 60 so that the input portion 42 protrudes upward (see FIG. 2).

The transmission mechanism 50 can take various forms as long as the rotation of the rotary shaft 20 is transmitted to the input unit 42 of the generator 40.
In the present embodiment, as shown in FIG. 2, the transmission mechanism 50 includes the output gear 51 operatively connected to the rotary shaft 20 and the generator 40 so as to be able to mesh with the output gear 51. And an input gear 52 supported so as not to rotate relative to the input unit 42.
Although a gear box for storing these gears 51 and 52 and storing lubricating oil is usually provided, the wind turbine generator 1 according to the present embodiment simplifies the entire device and reduces costs. Therefore, the gear box is not provided.

At least one of the output gear 51 and the input gear 52 is made of an industrial plastic material in consideration of quietness (noise during meshing rotation), and both of them are made of an iron material in consideration of durability. Produced. In this case, if the quietness is to be improved, a structure for supplying lubricating oil to the meshing portion is required.
In view of such a point, the wind turbine generator 1 according to the present embodiment includes the following lubricating oil supply structure without including a gear box for storing lubricating oil.

FIG. 5 (a) shows an enlarged view of a V portion in FIG.
As shown in FIG. 5 (a), the lubricating oil supply structure is at least one of the output gear 51 and the input gear 52 that mesh with each other (in the illustrated form, the output gear 51; An oil pocket portion 510 provided in a gear), in which an oil-impregnated material 500 such as felt impregnated with lubricating oil is engaged, and the oil pocket portion 510 communicates with the meshing portion. And a communication portion 520 to be made.

In the present embodiment, the oil pocket portion 510 is a recess that opens to the upper surface of the first gear.
Note that reference numeral 530 in FIG. 5A is a lid member for sealing the oil impregnated member 500 in the oil pocket portion 510.
The communication part 520 has one end connected to the oil pocket part 510 and the other end connected to the tooth bottom of the first gear.

By providing such a lubricating oil supply structure, an appropriate amount of oil contained in the oil-impregnated member 500 is supplied to the meshing portion via the communication portion 520 due to the centrifugal force accompanying the rotation of the first gear. The
Therefore, even if there is no lubricating oil reservoir, the lubricating oil can be reliably supplied to the meshing portions of the output gear 51 and the input gear 52.

Instead of such a lubricating oil supply structure, it is possible to employ another lubricating oil supply structure shown in FIG. 5 (b).
The lubricating oil supply structure includes a cover member connected to the upper surface of the first gear so as to define an oil-impregnated member housing space between the upper surface of the first gear (the output gear 51 in the illustrated embodiment). 550.
The cover member 550 is configured to open the oil-impregnated member accommodation space toward the meshing portion.

  Specifically, the cover member 550 has a radially inner end coupled to the upper surface of the first gear and a radially outer end configured to reach the teeth of the first gear. A donut shape is formed so as to define the oil-impregnated member accommodation space between the upper surface of the first gear.

In the present embodiment, as shown in FIG. 5 (b), the first gear includes a tooth portion 511, a peripheral edge portion 512 located radially inward of the tooth portion 511, and the peripheral edge portion 512. An inner portion 513 located radially inward, and the inner portion 513 is configured such that the upper surface position is higher than the upper surface position of the peripheral edge portion 512.
The cover member 550 includes a base end portion 551 connected to the upper surface of the inward portion 513, a central portion 552 extending radially outward from the base end portion 551, and a radially outer portion from the central portion 552. And a free end of the tip 553 reaches the tooth portion 511 of the first gear.

Preferably, the free end of the front end portion 553 of the cover member 550 is connected to the bottom of the tooth portion 511 of the first gear (the output gear 51 in the illustrated embodiment) and the second gear (illustrated) meshing with the first gear. In this configuration, the input gear 52) is positioned between the tooth tips of the teeth.
By providing such a configuration, the tip 553 of the cover member 550 comes into contact with the second gear while reliably supplying the oil from the oil-impregnated member 500 to the meshing portions of the first and second gears. It is possible to effectively prevent wear.

More preferably, the tooth bottom of the tooth portion 511 of the first gear can be formed deeper than the second gear meshing with the first gear.
Thus, by deepening the tooth bottom of the tooth portion 511 of the first gear and forming a pocket for receiving oil from the oil-impregnated member 500 in the first gear, the teeth in the first gear can be surely received. Oil can be widely distributed from the portion 511 to the tooth portion of the second gear.

In the lubricating oil supply structure shown in FIG. 5B, a solid body of grease oil is used as the oil-impregnated member 500.
In such a configuration, the liquid grease oil that has melted from the solid body due to heat generation during the rotation of the first and second gears is supplied to the meshing portion.

Further, as shown in FIGS. 1 and 2, the wind turbine generator 1 according to the present embodiment includes a brake mechanism 80 that operatively applies a braking force to the rotating shaft 20 in addition to the above configuration. .
The brake mechanism 80 is configured to automatically apply a braking force to the rotating shaft 20 in accordance with the wind speed and also to apply a braking force to the rotating shaft 20 manually.

FIG. 6 shows an enlarged cross-sectional view of the brake mechanism 80.
2 and 6, the brake mechanism 80 includes a brake plate 81 that rotates integrally with the rotary shaft 20, a brake arm 82 that applies a braking force to the brake plate 81, and the brake arm 82. A manual operation tool 83 for manually operating the brake arm 82, an electric actuator 84 for automatically operating the brake arm 82 according to the wind speed, and the manual operation tool 83 and the electric actuator 84 are connected to the brake arm 82 in parallel. And a connecting mechanism 85.

The brake arm 82 is configured to be able to selectively make frictional contact with the brake plate 81.
Specifically, the brake arm 82 has a brake pad 820 disposed at one end so as to be opposed to the brake plate. By pressing the brake pad 820 against the brake plate 81, a braking force is applied to the brake plate 81. Can be added.

As shown in FIG. 6, in the present embodiment, the brake mechanism 80 is a pair of first and second brake arms 821 disposed on both sides of the brake plate 81 as the brake arm 82. , 822.
The first brake arm 821 has a brake pad 820 disposed at one end portion so as to be opposed to one braking surface (a lower surface in the illustrated form) of the braking member 81.
Similarly, the second brake arm 822 has a brake pad 820 disposed at one end portion so as to face the other braking surface (upper surface in the illustrated embodiment) of the braking member 81.

The first and second brake arms 821, 822 have a brake operation state in which the brake pad 820 is pressed against the braking surface and a brake release state in which the pressure of the brake pad 820 on the braking surface is released. As can be taken, the first pivot shaft 821a and the second pivot shaft 822a that are parallel to the braking surface are swingable.
That is, the first and second brake arms 821 and 822 take a brake operating state when an operating force is applied in the brake operating direction along the corresponding pivot shafts 821a and 822a, respectively. When the force is released, the brake is released.

  In the present embodiment, the first brake arm 821 has the brake operating direction on the other side (the clockwise direction in FIG. 6) around the corresponding first pivot shaft 821a. In the two brake arms 822, one side around the corresponding second pivot shaft 822a (counterclockwise direction in FIG. 6) is the brake operating direction.

In the present embodiment, as shown in FIGS. 2 and 6, the brake mechanism 80 includes a base plate 86 and a support plate 87 standing on the base plate 86 in addition to the above-described configuration. The first and second brake arms 821 and 822 are swingably supported on the support plate 87 via the first and second pivot shafts 821a and 822a, respectively.
The base plate 86 is connected to the upper plate 62 of the power generation box 60.

  Preferably, each of the first and second brake arms 821 and 822 can support the corresponding brake pad 820 so as to be swingable about a pivot shaft parallel to the braking surface, thereby When in the activated state, the brake pad 820 can be brought into contact with the corresponding braking surface in a parallel posture (see FIGS. 7 and 8 below).

More preferably, as shown in FIG. 6, links 825 for connecting the brake pads 820 of the first and second brake arms 821 and 822 and the support plate 87 can be provided.
One end of the link 825 is swingably connected to the corresponding brake pad 820, and the other end is swingably connected to the support plate 87.
By providing such a link 825, the posture of the brake pad 820 when the first and second brake arms 821 and 822 are in a brake operating state can be more reliably made parallel to the braking surface. .

In the present embodiment, the brake plate 81 is made immovable in the axial direction with respect to the rotary shaft 20, and the brake plate 81 is clamped by the pair of first and second brake arms 821, 822. Of course, the present invention is not limited to such a form.
For example, the brake plate 81 can be moved in the axial direction with respect to the rotary shaft 20, a brake arm having a brake pad on one side of the brake plate 81, and a movement end of the brake plate on the other side. It is also possible to provide a fixing member.

  The manual operation tool 83 and the electric actuator 84 can position the first and second brake arms 821 and 822 in the brake operation state or the brake release state via the connection mechanism 85 without interfering with each other. It has become.

  In the present embodiment, as shown in FIG. 6, the connecting mechanism 85 is provided with a push link 851 that can be operated by both the manual operation tool 83 and the electric actuator 84, and the operation of the push link 851. And a driven link 855 for operating the brake arm (in the present embodiment, the first and second brake arms 821, 822).

The push link 851 is configured to be swingable about a fulcrum parallel to the brake plate 81 by any operation of the manual operation tool 83 and the electric actuator 84.
In this embodiment, the push link 851 is swingably connected to the support plate 87 via a push fulcrum shaft 852 extending in a direction parallel to the brake plate 81.

  The push link 851, the manual operation tool 83, and the electric actuator 84 are configured such that one operation of the manual operation tool 83 or the electric actuator 84 pushes the push link 851 without interfering with the other. They are operatively connected so as to swing in the brake operation direction (counterclockwise direction in FIG. 6) on one side around the fulcrum shaft 852.

Here, first, an operation connection structure between the push link 851 and the electric actuator 84 will be described.
The push link 851 has an electric actuator connecting piece 851a and a manual operating tool connecting piece 851b on one side and the other side of the pushing fulcrum shaft 852, respectively.
In the present embodiment, as shown in FIG. 2, the electric actuator 84 is disposed so as to operate the push link 851 along a direction perpendicular to the braking surface, while the manual operation is performed. The tool 83 is disposed so as to operate the push link 851 along a direction parallel to the braking surface.
Therefore, the electric actuator connecting piece 851a extends in a direction parallel to the braking surface, and the manual operation tool connecting piece 851b extends in a direction orthogonal to the braking surface.

In the present embodiment, as shown in FIG. 2, the electric actuator 84 can swing around the horizontal axis on the lower plate 61 of the power generation box 60 so as to be positioned below the push link 851. It is mounted on.
As shown in FIG. 2 and FIG. 6, the electric actuator 84 is composed mainly of an electric motor, a worm that rotates when the motor is operated, and a rack mechanism that meshes with the worm. Furthermore, the electric actuator is connected to the electric actuator connecting piece 851a via an electric actuator operating shaft 840 that is connected to the rack mechanism and moves forward and backward along a direction perpendicular to the braking surface.
As shown in FIG. 6, the electric actuator operating shaft 840 includes a shaft main body 841 and a flange portion 842 provided at a free end of the shaft main body 841 (an end connected to the electric actuator connecting end 851a). And have.
In the electric actuator connecting piece 851a, a connecting member 853 having a connecting opening having a diameter larger than the outer diameter of the shaft main body 841 and smaller than the outer diameter of the flange portion 842 is pivoted in parallel with the braking surface. It is provided so as to be rotatable around the support shaft.

  By providing such a configuration, as shown in FIGS. 6 and 7, the electric actuator operating shaft 840 is moved to one side in the axial direction (downward in FIGS. 6 and 7) based on the operation of the electric actuator 84. Then, the push link 851 swings in the brake operation direction on one side around the push fulcrum shaft 852, but on the contrary, the push link 851 moves toward the one side around the push fulcrum shaft 852. Even if it swings, the operation of the push link 851 is not transmitted to the electric actuator operation shaft 840.

Next, an operation connection structure between the push link 851 and the manual operation tool 83 will be described.
As described above, the manual operation tool 83 is disposed so as to operate the push link 851 along a direction parallel to the braking surface.
In the present embodiment, as shown in FIG. 6, the manual operation tool 83 is configured such that the distal end portion thereof faces the manual operation tool connecting piece 851 b at a position displaced upward from the pushing fulcrum shaft 852. In addition, the position in the axial direction can be adjusted.

  Specifically, as shown in FIG. 6, the manual operation tool 83 is screwed to the support plate 87, and when rotated about the axis based on an artificial operation, the manual operation tool 83 extends along the axial direction accordingly. Can move forward and backward.

In addition, the code | symbol 65 in FIG. 6 is a cover attached to the said power generation box 60 in order to protect the said generator 40 and the said transmission mechanism 50 from a wind and rain.
In the embodiment provided with such a cover 65, the manual operation tool 83 is plunged into the cover 65 such that the distal end reaches the manual operation tool connecting piece 851b, and the base end is externally connected. The cover plate 65 is supported by the support plate 87 in a state of protruding outward from the cover 65 so as to allow human operation.

Further, reference numeral 830 in FIG. 6 is an operation lever that is detachably connected to the base end portion of the manual operation tool 83.
When the wind turbine generator 1 is installed at a location that cannot be easily accessed, the operation lever 830 may be operated near the ground via a coupling mechanism such as a chain / sprocket.

  By providing such a configuration, as shown in FIGS. 6 and 8, when the manual operation tool 83 is moved to one side in the axial direction (left side in FIGS. 6 and 8) based on an artificial operation, the pushing operation is performed. The link 851 swings around one side of the pushing fulcrum shaft 852 in the brake operating direction. On the contrary, even if the pushing link 851 swings around one side of the pushing fulcrum shaft 852, The operation of the push link 851 is not transmitted to the manual operation tool 83.

  When the push link 851 is swung in the brake operation direction on one side around the push fulcrum shaft 852, the follower link 855 can bring the brake arm 82 into a brake operation state accordingly. It is configured.

In the present embodiment, as described above, the brake mechanism 80 has a pair of first and second pivot shafts 821a and 822a that are swingable as the brake arm 82 in parallel with the braking surface. 1 and second brake arms 821, 822.
Therefore, the driven link 855 brakes both the first and second brake arms 821 and 822 when the push link 851 is swung in the brake operation direction on one side around the push fulcrum shaft 852. It is configured to be in a state.

  Specifically, as shown in FIGS. 6 to 8, the driven link 855 has the first and the first links by swinging in the brake operation direction on one side around the pushing fulcrum shaft 852 of the pushing link 851. One of the two brake arms 821 and 822 (the first brake arm 821 in the illustrated form) is configured to swing in the brake operating direction around the corresponding pivot axis (in the illustrated form around the first pivotal axis 821a). And the other of the first and second brake arms 821 and 822 in response to the swing of one of the first and second brake arms 821 and 822 in the brake operating direction (the illustrated form). Then, the first and second tips configured to swing the second brake arm 822) around the corresponding pivot shaft (around the second pivot shaft 822a in the illustrated form) in the brake operation direction. And a link member 857 and 858.

  One end of the base end side link member 856 is rotatably connected to the push link 851, and the other end is the other end of the first brake arm 821 (the one end supporting the brake pad 820). End portion on the opposite side of the portion).

One end of the first distal end side link member 857 is rotatably connected to the other end of the first brake arm 821.
One end of the second distal end side link member 858 is rotatably connected to the other end of the second brake arm 822.
The other end portions of the first and second distal end side link members 857 and 858 are rotatably connected via a pivot pin 859.
The pivot pin 859 is inserted into a guide opening 870 formed in the support plate 87 along a direction parallel to the braking surface, and thereby, in a direction orthogonal to the braking surface. Movement is prevented.

The electric actuator 84 operates to stop the rotary shaft 20 when the rotational speed of the rotary shaft 20 exceeds a predetermined value (for example, the input rotational speed to the generator 40 is 120% of the rating) in a strong wind or the like. It is controlled to let you.
For example, when the generator 40 can detect the input rotation speed to the input unit 42, the electric actuator 84 is automatically turned ON / OFF by a signal from the generator 40.
Of course, instead of this, the wind power generator 1 may be provided with an anemometer, and the electric actuator 84 may be controlled to be turned on and off by a signal from the anemometer.

By providing the brake mechanism 80 having such a configuration, the following effects can be obtained.
That is, the electric actuator 84 that automatically operates according to the wind speed and the manual operation tool 83 that can be manually operated are operatively connected to the brake arm 82 in parallel through the connection mechanism 85.
Accordingly, excessive rotation of the rotary shaft 20 can be automatically prevented during strong winds and the rotation of the rotary shaft 20 can be stopped by human operation during an emergency such as a power failure or during maintenance work. Thereby, safety can be improved.
Further, both the manual operation tool 83 and the electric actuator 84 are operatively connected to the brake arm 82 by a single connection mechanism 85, and the connection mechanism 85 is one of the manual operation tool 83 and the electric actuator 84. The operation according to is transmitted to the brake arm 82 without interfering with the other.
Therefore, the cost can be reduced as compared with a mode in which a manual operation path for operatively connecting the manual operating tool 83 to the brake arm 82 and an automatic operation path for operatively connecting the electric actuator 84 to the brake arm are provided. Can do.

Preferably, the electric actuator 84 can be operatively connected to the brake arm 82 via a worm and rack mechanism as described above.
By providing such a configuration, even if the electric actuator 84 is stopped after the electric actuator 84 is operated according to the wind speed, the brake arm 82 can be held in the brake operating state.
Therefore, for example, even when the electric actuator 84 is de-energized for some reason during a strong wind, the brake arm 82 can be maintained in the brake operating state, thereby further improving safety. .

Furthermore, it is preferable that the brake mechanism 85 can be provided with a biasing member (not shown) that holds the brake arm 82 in a brake released state when no external operating force is applied.
By providing such an urging member, the brake arm 82 is brought into a brake operation state by the operation of the manual operation tool 83 or the electric actuator 84, and thereafter the operation of the manual operation tool 83 or the electric actuator 84 is released. In this case, it is possible to effectively prevent the brake pad 820 from continuing to slide on the brake plate, thereby improving the power generation efficiency and preventing the brake pad 820 from being worn.

FIG. 1 is a schematic front view of a wind turbine generator according to a preferred embodiment of the present invention. FIG. 2 is an enlarged vertical sectional view of a portion II in FIG. FIG. 3 is an enlarged vertical sectional view of a part III in FIG. FIG. 4 is an enlarged vertical sectional view of a portion IV in FIG. FIG. 5A is an enlarged view of a portion V in FIG. FIG.5 (b) is the V section enlarged view which concerns on a modification. FIG. 6 is an enlarged cross-sectional view of a brake mechanism in the wind power generator. FIG. 7 is an operation explanatory diagram of the brake mechanism shown in FIG. 6 and shows a state in which the brake is operated by the electric actuator. FIG. 8 is an operation explanatory view of the brake mechanism shown in FIG. 6 and shows a state in which the brake is operated by the manual operation tool.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Wind power generator 10 Support shaft 15 Lower bearing member (bearing member)
16 Upper bearing member (bearing member)
20 Rotating shaft 21 First hollow rotating member 22 Second hollow rotating member 30 Darrieus blade 40 Generator 50 Transmission mechanism 51 Output gear 510 Oil pocket portion 520 Communication portion 550 Cover member 52 Input gear 80 Brake mechanism 81 Brake plate 82 Brake arm 821 1st brake arm 822 2nd brake arm 83 Manual operation tool 84 Electric actuator 85 Connection mechanism 851 Pushing link 851a Electric actuator connection piece 851b Manual operation tool connection piece 855 Follow link

Claims (7)

A wind turbine generator configured to transmit rotation about an axis of a rotating shaft supporting a Darrieus blade to a generator;
A brake plate that rotates integrally with the rotating shaft;
A brake arm for applying a braking force to the braking plate;
A manual operating tool for manually operating the brake arm;
An electric actuator for automatically operating the brake arm according to wind speed;
A coupling mechanism for operatively coupling the manual operating tool and the electric actuator to the brake arm in a parallel state;
The connection mechanism is configured to transmit one operation of the manual operation tool and the electric actuator to the brake arm but not to the other.   The wind power generator according to claim 1, wherein the electric actuator is operatively connected to the brake arm through a worm and rack mechanism.   3. The urging member for holding the brake arm in a brake release state in a state where no operating force is applied by the manual operating tool or the electric actuator. 4. Wind power generator. The connection mechanism is a push link having a manual operation tool connection piece operatively connected to the manual operation tool and an electric actuator connection piece operatively connected to the electric actuator, and is swingable about a push fulcrum axis. Pushed link,
The push link and a driven link that connects the brake arm so that the brake arm is brought into a brake operation state when the push link swings in the brake operation direction on one side around the push fulcrum shaft. ,
The manual operation tool and the manual operation tool connecting piece are configured such that the push link is swung in the brake operation direction by the operation of the manual operation tool, and the swing operation of the push link in the brake operation direction is the manual operation tool. It is connected so that it is not transmitted to the operation tool.
In the electric actuator and the electric actuator connecting piece, the push link is swung in the brake operation direction by the operation of the electric actuator, and the swing operation of the push link in the brake operation direction is transmitted to the electric actuator. The wind turbine generator according to any one of claims 1 to 3, wherein the wind turbine generator is connected so as not to be connected. A wind turbine generator configured to transmit rotation about an axis of a rotating shaft supporting a Darrieus wing to a generator via a transmission mechanism,
The transmission mechanism has a pair of gears that mesh with each other,
At least one of the pair of gears is provided with an oil pocket portion capable of retaining lubricating oil and a communication portion for communicating the oil pocket portion with the gear meshing portion. A wind turbine generator configured to transmit rotation about an axis of a rotating shaft supporting a Darrieus wing to a generator via a transmission mechanism,
The transmission mechanism includes a pair of gears that mesh with each other;
A cover member connected to the upper surface of at least one of the pair of gears, the cover member defining a space for accommodating the oil-impregnated member between the upper surface of the gear,
The wind power generator, wherein the cover member is configured to open the oil-impregnated member housing space toward the gear meshing portion. The rotating shaft is a hollow shaft that is supported by extrapolation around a support shaft that is erected along a substantially vertical direction so as to be rotatable around an axis through a bearing member.
The wind turbine generator according to claim 5 or 6, wherein the bearing member is a ball bearing in which lubricating oil is sealed.

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