JP2009150319A - Wind turbine vibration damping device, and wind turbine device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vibration damping device to be used for a wind turbine device which is supported by a wind turbine support having a wind turbine blade and a rotating shaft, wherein the deterioration and breakage of an elastic member for supporting a weight, in particular, can be easily detected at the outside without the need for removing a cover from the vibration damping device. <P>SOLUTION: The vibration damping device 6 is mounted on part of the support 3 of the wind turbine device 1. It comprises a weight member 62 for suppressing the vibration of a wind turbine 2, and the elastic member 61 for supporting the weight member 62, wherein an informing means X1 is provided for informing outsiders of the deterioration and breakage of the elastic member 4 with the weight member 62 contacting other members 8, 72 arranged therenear. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a vibration damping device that suppresses vibrations of a wind turbine used as a wind power generator or the like. More specifically, the vibration damping device for a wind turbine having means for notifying abnormality of the vibration damping device to the outside, and the wind turbine The present invention relates to a windmill device including a vibration damping device.

  Conventionally, various windmills in which windmill blades (also referred to as wings, blades, etc.) rotate by receiving wind are known and used for applications such as power generators, anemometers / flow meters, rotating signs, toys, etc. Yes. As for the power generation device, wind energy, which is natural energy, is transmitted through the rotation shaft of wind turbine blades that have received wind and converted into kinetic energy to generate power. It is widely known as a prime mover. Such a wind power generator is generally configured to attach a windmill rotated by wind power to the top of a support such as a pole and turn the generator using the rotational force of the windmill as a power source to generate electricity. It is common.

  Wind turbines applied to such devices as wind power generators (hereinafter referred to as “wind turbine devices” as necessary) are roughly classified into two types, horizontal axis types and vertical axis types. In the horizontal axis type windmill, the rotation axis of the windmill is horizontal, that is, the direction of the wind and the rotation axis of the windmill are substantially parallel, and the rotational force is obtained by any difference in form of the windmill blade, drag or lift. Due to these differences, propeller type, sell wing type, Dutch windmill, etc. are mainly applicable. On the other hand, in the vertical type windmill, the rotation axis of the windmill is vertical, that is, the direction of the wind and the rotation axis are substantially orthogonal, and whether the rotational force is obtained by the difference in the form of the windmill blade, drag or lift Due to the difference, the paddle type, Darius type, gyromill type, Savonius type, etc. are mainly applicable.

  As described above, wind turbines can be roughly divided into a drag type and a lift type. The drag type windmill mainly uses a drag acting on the windmill blade by the wind, and the windmill rotates at a peripheral speed equal to or lower than the wind speed acting on the windmill blade. On the other hand, a lift type windmill mainly uses lift acting on a windmill blade such as a wing cross-section like an aircraft wing, and the windmill may rotate at a high peripheral speed several times or more of the wind speed. it can. For this reason, drag type windmill devices are generally inexpensive because the configuration can be simplified, and the lift type windmill device has a higher rotational speed of the windmill than the drag type even at the same wind speed, and the efficiency is drag. Each feature is higher than the mold.

Incidentally, in the windmill becomes windmill rotates by receiving wind and vibration source, when the excitation frequency coincides with the natural frequency f ₀ of the wind turbine device, in some cases the device by the resonance vibrates. In particular, in a vertical axis type windmill, vibration due to unbalanced windmills and vibration due to torque fluctuations are problematic.

First, vibration due to wind turbine unbalance is a problem that occurs in common with horizontal axis type and vertical axis type wind turbine apparatuses. In this case, the rotation frequency f _w of the wind turbine is the vibration frequency. For this reason, as a measure for reducing unbalanced vibration, a method of reducing the excitation force as much as possible by adjusting the balance so that the center of gravity of the windmill is brought close to the center of the rotating shaft is usually taken. Furthermore, the natural frequency f ₀ of the wind turbine device can be increased by increasing the diameter and thickness of a support member such as a pole that supports the wind turbine, or by increasing the rigidity of the support member by forming a rib or supporting by a wire. Measures may be taken to increase the maximum rotational frequency _{fwMAX of the} windmill. However, even if the balance is adjusted at the time of shipment, after the wind turbine device is installed, foreign matter such as dust and snow may adhere to the wind turbine blades and the balance may be lost. It is virtually impossible. In addition, measures to increase the diameter of the support or to increase the rigidity by ribs or the like lead to an increase in manufacturing cost accompanying an increase in weight and the number of parts, and there is a possibility that designability may be reduced.

  In addition, as a technique regarding the unbalance vibration reduction measure of the wind power generator which is a kind of windmill apparatus, for example, the following techniques are known. First, as a measure for reducing unbalanced vibration, a wind turbine generator having a structure in which a mesh-like or porous partition member through which liquid can pass is installed is installed at the top of the tower. A technique is disclosed in which the liquid stored in the liquid tank is swung in synchronization with the vibration of the tower, and the vibration of the tower can be attenuated by the flow resistance when the liquid passes through the partition member. (For example, refer to Patent Document 1).

  In addition, as a wind power generator equipped with a control means comprising a heavy object disposed on the upper part of a support part (support pole) that supports the windmill part, and an elastic part that elastically couples the heavy object to the support part, A technique for reducing vibration transmission from the windmill portion to the support pole by applying the windmill portion itself to a heavy object in the control means and connecting the windmill portion and the support pole via the elastic portion is disclosed. (For example, refer to Patent Document 2).

However, in the vertical shaft type windmill device having a plurality of windmill blades, vibration due to torque fluctuations is a problem in addition to unbalanced vibration. However, this point is disclosed in Patent Document 1 or 2 described above. Absent. That is, the vertical axis type wind turbine generates drag or lift by the action of wind and transmits torque to the rotating shaft. Among the wind turbine blades, it is possible to transmit the largest torque to the rotating shaft in the wind direction. On the other hand, since there is only one sheet that has been rotated to a predetermined position, torque fluctuation occurs as many times as the number n of windmill blades during one revolution of the windmill. Therefore, the wind turbine uses “(the number of wind turbine blades n) × (actual rotational frequency f _w )” as an excitation frequency, and vibration having a direction of a drag force or a resultant force of lift acting on all wind turbine blades in a substantially exciting direction. Is generated. Note that the vibration due to the torque fluctuation occurs regardless of whether or not the balance of the windmill is adjusted, and the direction and magnitude of the vibration always change depending on the wind direction and the rotation angle of the windmill.

Thus, for example, in order to mitigate the effects of unbalanced vibration, generating a natural frequency f ₀ of the wind turbine device it is made of set higher than the maximum rotational frequency f _Wmax windmill, vibration due to torque variation at n × f _{w Therefore} , f _w <f _{w MAX} <n × f _w = f ₀ may be _satisfied . That is, the wind power generator resonates at a rotation frequency of f ₀ / n. In addition, since the direction of the exciting force due to torque fluctuation always changes depending on the wind direction and the rotation angle of the windmill, for example, just by increasing the damping force in a specific direction as in the technique described in Patent Document 1, vibration countermeasures due to torque vibration are taken. Is insufficient. Further, for example, as in the technique described in Patent Document 2, simply reducing the vibration transmission from the windmill to the support cannot reduce the unbalance and especially the excitation force due to torque fluctuations. It is difficult to suppress resonance. Furthermore, in the technique described in Patent Document 2, since the vibration of the windmill portion itself due to torque fluctuation is not reduced, the fatigue strength of the windmill portion becomes insufficient, which may affect safety.

In particular, in the case of a wind turbine device of a vertical axis type, the direction of the excitation force due to torque fluctuations coincides with the direction in which the support pole of the wind turbine device can be easily bent, so that the entire wind turbine device is greatly shaken. Furthermore, the wind turbine does not always operate at the maximum rotation frequency f _wMAX , but rather operates at a rotation frequency of f ₀ / n. For this reason, the fatigue strength of the wind turbine device becomes insufficient due to the resonance, which not only affects the safety, but also may constantly give the viewer a sense of anxiety.

  Therefore, the applicant of the present invention has been able to effectively suppress unbalanced vibration and vibration caused by torque fluctuations that occur in a drag-type or lift-type vertical axis wind power generator having a plurality of windmill blades, and at a low manufacturing cost. As a wind turbine generator having a simple vibration control structure, a vertical axis type windmill, a support body that supports the windmill from the lower end side, and a plurality of dynamic vibration absorbers (hereinafter referred to as upper ends or upper portions) attached to the upper end portion or the upper part of the support body And a “vibration control device”), and a wind power generation device has been developed in which the vibration control device includes a weight portion and an elastic portion attached to the weight portion (see Patent Document 3).

  According to a wind turbine generator equipped with such a vibration damping device, even if the direction and magnitude of the excitation force always change due to torque fluctuation, the vibration damping device that can move the vibration of the wind turbine generator in any direction. Since the vibration can be converted into the vibration of the weight portion, when the vibration damping device is attached to the upper end portion of the support body, the primary or secondary mode fluctuation of the wind power generator caused by torque fluctuation is reduced. be able to. Moreover, when the vibration damping device is attached to the upper part of the support body, it is possible to further reduce the fluctuation of the primary mode of the wind turbine generator due to torque fluctuation. Furthermore, by using a plurality of vibration control devices adjusted for each mode, vibrations in a plurality of modes such as primary or secondary can be reduced. From such an effect, in such a wind turbine generator, vibration due to unbalanced vibration generated by the windmill, vibration due to torque fluctuation, or sudden wind speed fluctuation is reduced by a vibration damping device attached to the support or the windmill. Therefore, it is possible to provide a wind turbine generator having a simple damping structure with low manufacturing cost.

JP 2003-176774 A JP 2007-40146 A Application for Japanese Patent Application No. 2007-289240

  By the way, a member having a function of supporting the weight portion while having an elastic force, such as one or more anti-vibration rubbers, a spring, and a wire, is applied to the elastic portion used in the vibration damping device disclosed in Patent Document 3. The Such an elastic part transmits vibration due to unbalance and torque fluctuation as described above using a windmill rotating by receiving wind power to the weight part. Since an oscillating force is acting, the elastic portion inevitably deteriorates over time, and may break as a result of tearing during strong winds. In order to prevent such deterioration and tearing of the elastic portion, it is assumed in advance that periodic inspection and replacement inside the vibration damping device is performed.

  However, this type of vibration damping device is usually covered with a cover so that the internal mechanical parts are not visible from the outside, from the viewpoint of protecting the internal mechanical parts, safety, and improving the appearance. Since it is customary, it cannot be confirmed whether or not the elastic portion and other parts are deteriorated or damaged until the cover is removed. Therefore, apart from removing the cover when replacing parts, the work of removing the cover each time just to check whether there is deterioration or damage to the elastic part among the parts in particular, It will be very expensive and time consuming. Such a problem is not limited to the vertical axis type wind power generator as disclosed in Patent Document 3, and is common to apparatuses that use a windmill regardless of whether it is a vertical axis type or a horizontal axis type. It exists.

  Therefore, in view of the above problems, the present invention makes it easy to externally degrade or break an elastic member that supports a weight in a vibration damping device used in a wind turbine without removing the cover that covers the vibration damping device. The main purpose is to provide what can be detected.

  That is, the present invention is applied to a windmill device including a windmill including a windmill blade that receives wind to generate torque and a rotating shaft that supports the windmill blade, and a support body that supports the windmill, and the support body. And a weight member that suppresses vibrations of the windmill and an elastic member that supports the weight member, and the weight member is disposed in the vicinity of the weight member. A wind turbine damping device comprising a notification means for notifying the outside of deterioration or breakage of an elastic member by contacting the member.

  Here, the windmill blade means a blade of a drag type or lift type windmill. In addition, the windmill device is a term used as a general term for devices using a windmill in the present invention, and examples thereof include a wind power generator, an anemometer / flow meter, a rotating signboard, and a toy. The damping device is generally the upper end of the support, that is, the region from the position of the antinode of the secondary mode in the vibration mode of the windmill device, which is approximately the center in the height direction of the support, to the upper end of the support, or It is preferable that the vibration damping device is disposed at an upper portion of the support body, that is, above the upper end of the support body in the wind turbine device. It can set suitably, without being limited to a part or an upper part. Each of the weight member and the elastic member constituting the vibration damping device may be composed of a single part, or may be composed of a combination of a plurality of parts. Further, the number of weight members and elastic members provided in the vibration damping device may be single or plural, and can be arbitrarily set as necessary. The weight member can be a heavy object made of an appropriate material such as metal, synthetic resin, or wood, and the elastic member can be an appropriate member having elasticity and internal damping, such as rubber, spring, or wire. can do. The informing means notifies the deterioration or breakage of the elastic member by contacting the weight member with another member, but this “other member” may be a constituent member of the vibration damping device. A member constituting the support or other parts may be used, and various members can be applied as long as they are arranged in the vicinity of the weight member. The “notification” by the notification means means that a person can detect from any of the five senses from the outside of the wind turbine device.

  In such a wind turbine damping device according to the present invention, during normal operation in which the elastic member is not deteriorated or damaged, vibration caused by resonance of the wind turbine device using the rotation of the wind turbine receiving the wind as an excitation source is elastic. The member absorbs partly by its own elasticity and is transmitted to the weight member and can be absorbed by the constant vibration of the weight member, but if the elastic member does not function normally due to deterioration over time or damage, etc. As a result, the vibration absorbing performance of the elastic member itself is lowered, and the vibration cannot be accurately transmitted to the weight member. As a result, the vibration amplitude of the weight member is increased. In the present invention, such a property is effectively used to provide the vibration control device with the notification means. In the vicinity of the weight member, the normal member does not come into contact with the weight member, but the elastic member is deteriorated or damaged. By arranging the other member at a position where the weight member contacts when an abnormality occurs, the deterioration member or the breakage of the elastic member can be notified to the outside by positively contacting the weight member with the other member at the time of the abnormality. I can do it. Therefore, the present invention has the beneficial effects as the vibration damping device disclosed in Patent Document 3 as described above, and usually without removing the cover covering the periphery of the vibration damping device. Since it is possible to detect deterioration or breakage of the elastic member, it is possible not only to reduce the cost and labor of the inspection work that was performed with the cover removed, but also for those who are not expert inspection workers. It becomes possible to know the occurrence of abnormality. Further, the vibration damping device as described above may be provided in the wind turbine device from the beginning, or may be retrofitted to the existing wind turbine device.

  As an example of a preferable notification means in the present invention, there is a means for notifying the outside of deterioration or breakage of the elastic member by a contact sound between the weight member and another member. If the notification means uses such contact sound, the abnormality can be notified by an easy-to-understand means such as a contact sound (or a collision sound if strong), and other than the weight member and other members are required for the notification. Therefore, it is possible to configure a vibration damping device including a notification unit with a very simple configuration and low cost.

  As other informing means, an electric informing mechanism for electrically informing the outside of deterioration or breakage of the elastic member by contacting the weight member with another member, or the elastic member by chemical change. A chemical notification mechanism that notifies the deterioration or breakage to the outside, or a mechanical notification that notifies the deterioration or breakage of the elastic member to the outside by mechanically operating the other member or a member connected to the other member. Any one of the mechanisms, or a combination of a plurality of types of mechanisms can be exemplified. In the case of an electric notification mechanism, for example, a piezoelectric element is provided on another member that comes into contact with the weight member and connected to an external electric device, and an electromotive force due to an impact force applied to the piezoelectric element when these two members are in contact with each other. By operating or stopping the electric device using the above, it can be configured to notify the abnormality of the elastic member to the outside. Various types of devices such as a device that turns on a light such as a light bulb or LED, a device that sounds a buzzer or a siren, and a device that transmits a signal to a computer such as a management office of a windmill device can be applied to the electric device. On the other hand, the chemical notification mechanism is based on a chemical reaction of two or more types of substances. For example, each substance is attached to a weight member and another member by coating or the like. By causing a chemical reaction, an abnormality of the elastic member can be notified to the outside. As the chemical reaction, various modes that produce color or decoloration, light emission or quenching (darkening), and the like can be applied. In the case of the mechanical notification mechanism, for example, when the weight member and the other member are in contact with each other, the other member itself is moved from the original position, or the member connected to the other member in contact with the weight member is It can be configured to notify the abnormality of the elastic member by visually recognizing that it has moved from the original position. More specifically, for example, the other member that contacts the weight member is used as one member constituting the link mechanism, and the other member is operated by the contact of the weight member, so that the member on the other end side of the link mechanism. It is possible to easily know the abnormality of the elastic member by configuring so that it can be seen from, for example, a viewing window provided at the lower end of the windmill device, etc. be able to. Alternatively, a part of the link mechanism may be protruded from a slit provided in the support body of the windmill device, and the part protruding from the slit may be operated so that the abnormality of the elastic member can be known. . By providing such a mechanical notification mechanism in the windmill device as a notification means, when the windmill device is installed in a quiet residential area where it is difficult to make noise in consideration of the surrounding environment, no sound is emitted. The abnormality of the elastic member can be detected by visual recognition. In addition, the various alerting | reporting mechanism which comprises the alerting | reporting means demonstrated above may be applied independently, and it is also possible to apply combining several types of mechanism.

  Other members that function as notification means in contact with the weight member are connected to a member constituting a mounting mechanism for attaching a vibration damping device including the weight member and the elastic member to a part of the support, or a windmill. Any one or more types of members among a cable housing member through which cables are inserted, a cover member that covers the damping device including the weight member and the elastic member from the outside, and a member that constitutes a part of the support body It is possible to employ a combination of these. In particular, in order to achieve a configuration that does not involve an increase in the number of parts or an increase in cost, a member that has been conventionally provided in each part such as a support, a vibration control device, a cover member, or an attachment mechanism is used as the other member. However, a special member provided only for contacting the weight member only when the elastic member is abnormal may be used as the other member. Moreover, it is good also as another member which can contact a weight member among these members, and can also make multiple types into the said other member. When a plurality of types of members are used as the other members, if the weight member comes into contact with any one of the plurality of types when the elastic member is abnormal, the function as a notification means is exhibited, so more reliable notification Can be expected. In addition to the above, as the other member that comes into contact with the weight member, a member (or a combination of a plurality of types of members) that constitutes the vibration damping device and excludes the weight member and the elastic member may be employed.

  Specifically, as an attachment mechanism, a structure in which a plurality of columnar members are arranged in a vertical posture on a support plate attached to a support, and an elastic member that supports a weight member is placed on or suspended from the support plate. Therefore, it is a preferable example to use such a columnar member as another member that can come into contact with the weight member. In this case, if a plurality of columnar members are arranged at approximately the same distance from the weight member, it functions as a notification means if any columnar member comes into contact with the weight member when the elastic member is abnormal. It can be said that it is excellent.

  Further, in the same manner as the columnar member which is a part of the mounting mechanism as described above, a cable housing member through which these cables are inserted in order to route cables such as an output line connected to the windmill and a brake for the windmill. In some cases, a configuration in which the motor is disposed in the vicinity of the vibration damping device is also conventionally employed. Therefore, both the columnar member and the cable housing member can be applied as other members. Therefore, the weight member is formed into an annular horizontal cross-sectional shape having a hole through which the center portion passes vertically, and a plurality of columnar members are arranged around the weight member, and the cable housing member is inserted through the hole portion of the weight member. If it arrange | positions, the structural member of the conventional windmill apparatus can be utilized as another member, and also it becomes possible to make compact the arrangement structure of a weight member, a columnar member, and a cable accommodating member. In this case, the distance from the weight member to the cable housing member and the plurality of columnar members is adjusted by adjusting the diameter of the hole of the weight member, the cross-sectional shape and size of the cable housing member, and the interval between the outer edge of the weight member and the plurality of columnar members. If the weight members are substantially equidistant, the weight member can serve as a notification means when the weight member contacts any of the cable housing member and the plurality of columnar members when the elastic member is abnormal. Is possible.

  In addition, when the other member which contacts a weight member at the time of abnormality of an elastic member is comprised from several types of members or a plurality of members like the example mentioned above, all the other members are substantially equidistant from the weight member. By disposing in this manner, it is possible to increase the types and the number of parts that can be contacted by the weight member, and improve the reliability of notification.

  The present invention also provides a wind turbine damping device of various modes as described above, a wind turbine including a wind turbine blade that receives torque to generate torque, and a rotating shaft that supports the wind turbine blade, and supports the wind turbine. In addition, the wind turbine apparatus includes a support body attached with a part of the vibration damping device for the wind turbine.

  In the present invention, any type of wind turbine can be applied regardless of a vertical axis type, a horizontal axis type, a drag type, or a lift type. Moreover, as a windmill apparatus, what has various uses, such as a wind power generator, an anemometer, a flow meter, a rotation signboard, and a toy, can be employ | adopted suitably. And since the windmill apparatus of this invention has a damping device provided with the alerting | reporting means as demonstrated above, a windmill apparatus itself notifies the deterioration or breakage of the elastic member in a damping device to the exterior. It can be said that it has extremely convenient and useful functions.

  The vibration damping device for wind turbines of the present invention uses an elastic member and a weight member provided in a vibration damping device that reduces vibration caused by resonance of the wind turbine device using the rotation of the wind turbine receiving the wind as an excitation source. By effectively utilizing the property that the amplitude of the vibration of the weight member increases if the elastic member becomes abnormal due to aging or breakage, the weight member is actively used with respect to other members arranged in the vicinity thereof. Although it has a simple configuration of contacting, it has extremely useful notification means that can notify the outside of the elastic member to the outside without removing the cover member that covers the periphery of the vibration damping device. Therefore, it is possible to reduce the cost and labor of the inspection work of the vibration control device by removing the cover, which was necessary in the past, and the elastic member is deteriorated not only by the professional inspection worker but also by other amateurs. Alternatively, it is possible to easily notify the occurrence of an abnormality such as breakage.

  In addition, if the wind turbine apparatus according to the present invention provided with such a vibration damping device, useful wind power generation capable of notifying the outside of deterioration or breakage of the elastic member, which is a consumable item, while suppressing an increase in cost and an increase in parts as much as possible. Devices such as devices, anemometers / flow meters, rotating signs, and toys can be provided.

  Embodiments of the present invention will be described below with reference to the drawings. In the following, a preferred embodiment of a wind turbine generator using a straight blade vertical axis wind turbine (straight blade Darius type wind turbine) and a damping device attached to the same as an example of a wind turbine device will be described. However, the present invention can be widely applied to a drag type or lift type vertical axis wind turbine apparatus or a horizontal axis wind turbine apparatus in general. That is, the present invention relates to a known vertical axis type windmill device such as the paddle type, Darius type, gyromill type, and Savonius type, or a combined vertical axis type windmill device such as Darius + Savonius type, propeller type, cell, etc. The present invention can also be applied to a horizontal axis type wind turbine device such as a wing type or a Dutch wind turbine.

  1ST EMBODIMENT Hereinafter, although the wind power generator 1 and the damping device 6 which concern on 1st Embodiment of this invention are demonstrated, the outline | summary of the whole wind power generator 1 is made into this wind power generator 1 next. As for the configuration of the vibration damping device 6 used, the configuration and operation of the notification means X1 will be described in order. 1 and 2 show an outline of the wind turbine generator 1 of the present embodiment. FIG. 1 is a side view of the entire wind turbine generator 1. FIG. 2 shows the wind turbine generator 1 viewed from the Z direction shown in FIG. FIG. FIG. 3 is a partial detailed perspective view of a portion A shown in FIG. 1, and FIG. 4 is a side view of the portion B shown in FIG.

  As shown in FIGS. 1 to 4, the wind turbine generator 1 of the present embodiment includes a windmill 2 that is rotated by wind power, a support body 3 that is erected in a vertical direction from the ground and the like to support the windmill 2 at a predetermined height, A generator 4 that is connected to the windmill 2 and uses the rotational force of the windmill 2 as a drive source, a brake 5 that stops the rotation of the windmill 2, and a vibration control device 6 that suppresses vibration of the wind power generator 1 (also referred to as a dynamic vibration absorber). Etc.) as main components, and the wind turbine 2, the generator 4, the brake 5, the vibration damping device 6, and the like are attached to the support 3 via the attachment mechanism 7. In addition, in the wind turbine generator 1 of the present embodiment, the vibration control device 6 is accompanied by a notification unit X1 having a function of notifying the outside of deterioration or breakage of an elastic member 61 (described later). X1 will be described in detail later.

  First, as shown in FIGS. 1 and 2, the windmill 2 includes, for example, three blades (windmill blades) 21 arranged at equal intervals in the rotation direction, and a plurality of arms 22 that respectively support the blades 21. And a rotor 23 having a rotation shaft arranged at the rotation center of the three blades 21. Each blade 21 is equally blade-shaped in the horizontal section, and is a straight blade in the vertical direction. Each wing 21 is supported so as to be able to withstand wind force by an arm 22 (reference numeral is common) facing obliquely upward, horizontally, and obliquely downward. The rotor 23 supports each arm 22 and has a vertical rotation axis (not shown).

  The support 3 is a long member arranged in a vertical posture. In this embodiment, for example, the support 3 mainly includes a pole 31 made of a metal round pipe having a circular cross section, which is a kind of a tubular tube having a hollow portion. Have as. The lower end of the pole 31 is fixed to a square pole 32 made of, for example, a square pipe material having a larger cross-sectional shape than the pole 31, and the square pole 32 is fixed to a foundation 35 provided on the ground by an anchor 33 or the like. On the other hand, it is possible to maintain a vertical posture by being firmly fixed. Note that a control device (not shown) of the wind power generator 1 is accommodated in the square pole 32, and the control device can be operated by opening the door 32a. A flange 34 for fixing the attachment mechanism 7 is fixed to the upper end of the pole 31.

  As shown in FIGS. 3 and 4, the attachment mechanism 7 is provided at the upper end portion of the support 3 in order to attach each member as described above. Specifically, in the present embodiment, the attachment mechanism 7 includes a flat plate 71 that is overlapped and fixed to the flange 34 at the upper end of the pole 3, and a substantially concentric circle that draws a concentric circle with the center along the outer periphery of the flat plate 71. A plurality of (four in this embodiment) support columns 72 which are standing columnar members and a flat plate 73 fixed to the upper end of each support column 72 are mainly configured. Each of the flat plate 71, the flat plate 73, and the flange 34 is a circular metal flat plate, and although not shown in part, a hole penetrating vertically is formed in the central portion. The flat plate 71 and the flat plate 73 are paired up and down, and both are arranged such that the central axis coincides with the central axis of the pole 31.

  The generator 4 is mounted and fixed on the upper surface of the upper flat plate 73 in the attachment mechanism 7 and connects the rotor 23 of the windmill 2 to the upper side in the vertical direction. Moreover, the brake 5 is attached with the attitude | position suspended from the lower surface side of the flat plate 73, and is comprised so that the rotation of the windmill 2 can be forcedly stopped or suppressed as needed.

  The vibration damping device 6 is supported by the lower flat plate 71 in the attachment mechanism 7 and, as shown in FIGS. 3 and 4, specifically, a plurality of elastic members mounted on the flat plate 71 and attached thereto. The member 61 and the weight member 62 mounted on the elastic member 61 are attached. In this embodiment, the anti-vibration rubbers 61 are applied as a plurality (three in this embodiment) of elastic members, and these anti-vibration rubbers 61 are arranged at equal intervals on a concentric circle whose center coincides with the flat plate 71. . For example, the weight member 62, which is a weight member, is a metal cylindrical member having an annular horizontal cross-section with a through hole 62a at the center, and includes three anti-vibration rubbers 61. The weight member 62 is also arranged on a concentric circle whose center is matched. The mass, which is a design element of the vibration damping device 6, can be adjusted by changing the height of the weight member 62, for example. The damping and the spring constant of the vibration damping device 6 can be adjusted with the specifications and quantity of the vibration-proof rubber 61. It can be adjusted by changing. Here, in the vibration damping device 6, its natural frequency is substantially equal to the natural frequency of the entire wind power generator 1 excluding the vibration damping device 6, and its damping ratio is a known damping device design method (dynamic The mass of the weight member 62, the quantity of the anti-vibration rubber 61 and the spring constant are adjusted and determined so as to be approximately equal to the optimum damping ratio in the vibration absorber design method. The number of the anti-vibration rubbers 61 is not particularly limited as long as a desired spring constant and damping ratio can be obtained, and can be one or more.

  As described above, the vibration damping device 6 is disposed on the upper portion of the support body 3 at a position close to the rotor 23 that is the support portion of the windmill 2 in the vertical direction, as shown in FIG. In the direction, as shown in FIGS. 3 and 4, the vibration damping device 6 is mounted so as to be horizontal and substantially coincide with the axis of the support 3 (pole 31). Thereby, the damping device 6 will be arrange | positioned among the wind power generators 1 at the upper part of the support body 3 with large vibration amplitude, so that the vibration of the wind power generator 1 can be reduced effectively. Is set.

  Further, an output line 41 is connected to the above-described generator 4, and a brake cable 51 is connected to the brake 5, and as shown in FIGS. 3 and 4, various cables that need to be wired including these are connected. Is inserted into the lower pole 31. In this embodiment, in order to prevent these cables from coming into contact with the vibration control device 6 during normal operation of the wind turbine 2, the cables are inserted into the cable housing member 8 and the poles are inserted. 31 leads into. Specifically, in the present embodiment, a circular metal round pipe material whose horizontal cross-sectional shape is circular is applied to the cable housing member 8, and this cable housing member 8 is, for example, formed at the center of the flat plate 71. The cable housing member 8 is positioned so that the central axis of the cable housing member 8 is aligned with the central axes of the pole 31, the flange 34, the flat plate 71, and the weight member 62. That is, the cable housing member 8 is inserted into the through-hole 62a of the weight member 62, and thereby the cables are penetrated into the pole 31 and the vibration damping device 6, so that the cables are the vibration damping device. In addition to not hindering the operation of 6, the cables are protected without being exposed to the outside, and the appearance is also improved.

  Here, the horizontal distance d1 between the outer periphery of the cable housing member 8 and the peripheral surface 62b of the through hole 62a of the weight member 62 is as shown in FIG. 4, even if the weight member 62 vibrates with a normal amplitude. The size is large enough not to contact the cable housing member 8. Further, the horizontal distance d2 between the outer periphery of the weight member 62 and each column 72 of the mounting mechanism 7 is also a sufficient distance so that the column member 72 does not come into contact with the column member 72 even if the weight member 62 vibrates normally. In this embodiment, as an example, the distance d1 is set to be smaller than the distance d2 (d1 <d2). However, the distance d1 between the weight member 62 and the cable housing member 8 and the distance d2 between the weight member 62 and each column 72 can be set as appropriate.

  Further, the generator 4, the brake 5, and the vibration damping device 6 described above are integrated as a unit together with the mounting mechanism 7. The periphery of this unit is protected by being covered with a cylindrical cover member 9. Among the components in this unit, for example, the vibration-proof rubber 61 that is considered to be most easily consumed is protected by the cover member 9 in this way, and thus is not directly subjected to ultraviolet rays, wind and rain, etc. Try to reduce the speed of deterioration.

Next, the outline of the control function of the vibration damping device 6 provided in the wind turbine generator 1 of the present embodiment will be described. When the windmill 2 is rotated by receiving wind, torque fluctuations corresponding to the number of blades 21, that is, three times, are generated as a radial excitation force of the windmill 2 and transmitted to the rotor 23 while the windmill 2 rotates once. . At this time, the excitation frequency is 3 × f _w (Hz) with respect to the number 3 (sheets) of the blades 21 and the rotational frequency f _w (Hz) of the windmill 2. On the other hand, for example, when the natural frequency f ₀ of the wind power generator 1 is 6 Hz, resonance due to imbalance occurs when the rotational frequency of the windmill 2 is 6 Hz (= 360 rpm), and resonance due to torque fluctuation is 6 Hz ÷ 3 (sheets) = Generated at 2 Hz (= 120 rpm). At this time, the vibration damping device 6 suppresses the vibration of the wind power generator 1 by causing the weight member 62 to vibrate in a substantially opposite phase to the resonating wind power generator 1. That is, the vibration damping device 6 of the present embodiment suppresses resonance due to unbalance and resonance due to torque fluctuation.

  For example, when the number of blades 21 of the windmill 2 is four, resonance due to imbalance occurs at a rotational frequency of 6 Hz as in the case of three blades 21, and resonance due to torque fluctuation has a rotational frequency of 6 Hz ÷ 4 ( Sheet) = 1.5 Hz (= 90 rpm). However, vibration at any rotational frequency can be suppressed by the vibration damping device 6 of the present embodiment. Therefore, the number of blades 21 is not limited to three as in this embodiment.

  Moreover, the wind power generator 1 of this embodiment is classified into a small wind power generator, and reduction of manufacturing cost is desired especially in such a small wind power generator. According to the present embodiment, the vibration of the support body 3 due to the rotation of the windmill 2 or direct wind force can be suppressed to a low level by the vibration damping device 6 having a simple structure as described above attached to the support body 3. That is, according to the present invention including this embodiment, it is possible to provide the wind turbine generator 1 and the vibration damping device 6 that have a simple vibration damping structure that can keep the manufacturing cost low.

  By the way, in the vibration damping device 6 that exhibits the control function as described above, the vibration isolating rubber 61 that is an elastic member is constantly oscillating together with the weight member 62 while the wind turbine 2 is operating. That is, it can be said that the anti-vibration rubber 61 made of a fragile material as compared with the weight member 62 is a consumable part that needs to be regularly replaced because it will deteriorate over time. Therefore, normally, before the set service life elapses, the worker climbs up to the upper part of the support 3 and opens the cover member 9 to perform the replacement work of the vibration isolating rubber 61. However, the anti-vibration rubber 61 is deteriorated before periodic inspection / replacement work, or a large vibration is momentarily applied to the vibration control device 6 due to a sudden cause such as a strong wind and the anti-vibration rubber 61 is torn. It is also expected that it will be damaged. Therefore, in the wind turbine generator 1 of the present embodiment, the above-described notification means X1 is provided in the vibration damping device 6 so that the fact that the vibration-proof rubber 61 has deteriorated or broken can be notified to the outside.

  That is, in the present embodiment, as shown in FIG. 5, the notification means X <b> 1, when one or more anti-vibration rubbers 61 are deteriorated or damaged, the weight member 62 vibrates with a large amplitude that is greater than the normal amplitude. Due to the relationship between the two distances d1 and d2 (d1 <d2), the inner peripheral surface 62b of the weight member 62 comes into contact with the outer peripheral surface 8a of the cable housing member 8 to generate a contact sound (a collision sound in the case of strong contact). By doing so, it is possible to notify the deterioration or breakage of the vibration-proof rubber 61 to the outside. By providing such an informing means X1, an abnormality of the anti-vibration rubber 61 that is a consumable member in the vibration damping device 6 can be known before the cover member 9 is opened, so whether or not the anti-vibration rubber 61 has deteriorated. Regardless of whether or not it is necessary to open the cover member 9, it is possible to greatly reduce the conventional labor that could not be inspected inside. In addition, since there is no need to use a special device for the notification means X1, since the existing members such as the weight member 62 and the cable housing member 8 are used, there is no increase in cost when providing the notification means X1. .

  <Modification of First Embodiment> Next, a modification of the vibration damping device 6 in the first embodiment will be described with reference to FIGS. 6 and 7. FIG. 6 is a perspective view showing the vibration damping device 6 ′ and its peripheral parts. In the following description, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted. (The same shall apply to other embodiments hereinafter).

  As shown in FIGS. 6 and 7, in the vibration damping device 6 ′, the weight member 62 ′ has the same weight member main body 62 (same as the weight member 62) and the weight member 62 ′. The auxiliary weight member 63 is composed of one or more annular metal flat plates that are mounted on the upper surface of the main body 62 and attached using a fixing tool such as a bolt. The auxiliary weight member 63 has an outer diameter and an inner diameter that are substantially the same as those of the weight member main body 62, and the thickness thereof is sufficiently smaller than the thickness of the weight member main body 62. Is mounted on the weight member main body 62 and is fixed, whereby the mass of the weight member 62 ′, which is a design element of the vibration damping device 6 ′, can be easily changed according to conditions. The auxiliary weight member 63 may be appropriately fixed with respect to the weight member main body 62. Further, as the elastic member, the vibration isolating rubber 61 similar to that of the first embodiment is applied, and the arrangement configuration is the same as that of the first embodiment with respect to the weight member main body 62.

  Also in this case, as in the case of the first embodiment described above, as shown by an imaginary line in FIG. 7, the notification means X1 ′ has a weight member 62 due to deterioration or breakage of at least a part of the plurality of vibration isolating rubbers 61. When the amplitude of 'becomes more than normal, the inner peripheral surface 62b of the weight member main body 62 or the inner peripheral surface 63b of the auxiliary weight member 63 comes into contact with the outer peripheral surface 8a of the cable housing member 8 to emit sound, thereby preventing the noise. The function of informing the outside of the vibration rubber 61 to the outside is exhibited.

  In addition, in 1st Embodiment and its modification, although the notification member X1 and X1 'showed the structure which produces the contact sound when the weight member 62 or the auxiliary weight member 63 contacts any of the cable accommodating members 8, The present invention is not limited to this aspect, and the outer diameter and inner diameter of the weight member 62 are appropriately set, the horizontal distance d1 between the weight member 62 and the cable housing member 8, and the horizontal direction between the weight member 62 and the support column 72. By appropriately setting the distance d2, the weight member 62 may be in contact with only the plurality of columns 72 of the mounting mechanism 7 when the vibration isolating rubber 61 is deteriorated or broken. For example, FIG. The weight member 62 (auxiliary weight member 63) is composed of the column 72 and the cable housing member so that the state of the vibration damping device 6 when the vibration-proof rubber 61 is deteriorated or broken is indicated by an imaginary line. 8 and contact at the same time It may be. In this case, the distance d1 between the weight member 62 and the cable housing member 8 and the distance d2 between the weight member 62 and each column 72 are substantially equal distances (d1≈d2). By doing so, if the weight member 62 comes into contact with at least one of the support column 72 and the cable housing member 8 when an abnormality occurs in the vibration isolating rubber 61, the abnormality of the vibration isolating rubber 61 is transmitted to the outside. It is possible to notify.

  Further, as described above, the position of the vibration damping device 6 is preferably close to the rotor 23 that is the support portion of the wind turbine 2, but the upper portion of the support body 3 is preferable. It may be inside the machine 4 or inside the support 3. Alternatively, the connecting shaft (not shown) between the windmill 2 and the generator 4 is made into a hollow structure, and a support 31 that is coupled to the pole 31 and penetrates the rotor 23 and is not affected by the rotation of the windmill 2 is provided therein, You may arrange | position the damping device 6 in the upper end surface of the windmill 2 which is the front-end | tip of the support | pillar. Furthermore, it is more preferable that the radial position of the vibration damping device 6 is substantially coincident with the axial vibration of the pole 31, but the present invention is not limited to this, and the vibration damping device 6 is disposed outside the generator 4 and the pole 31. May be. Some of these examples will be described below as other embodiments.

  Second Embodiment A wind turbine generator and a vibration damping device 160 according to a second embodiment of the present invention will be described. FIG. 9 and FIG. 10 are a perspective view and a longitudinal sectional view, respectively, showing the vibration damping device 160 provided in the wind turbine generator and its peripheral portion in the present embodiment. Each of these figures shows the upper part of the support 3, and the entire wind power generator shows the vicinity of part A in FIG. In addition, although illustration and a code | symbol are abbreviate | omitted about the whole wind power generator, the same code | symbol shall be attached | subjected and demonstrated about the same member as 1st Embodiment.

  The vibration damping device 160 attached to the wind turbine generator of the present embodiment is attached to the hollow interior of the pole 31 constituting the support 3. Specifically, in the first embodiment, the flange 34 attached to the upper end of the pole 31 and the flange 34 similar to the flat plate 71 superimposed on the upper surface of the flange 34 and the central portion of the flat plate 171 are fixed by penetrating the upper end portion 180b. It is supported by the cable housing member 180. Specifically, the cable housing member 180, which is a circular metal round pipe member, is fixed to the flat plate 171 so as to be substantially concentric with the pole 31, so that the cable housing member 180 is suspended. Since the vibration damping device 160 is supported by a flange 174 that is externally fitted and fixed to the lower end portion of the cable housing member 180, the attachment mechanism 170 is constituted by the cable housing member 180, the flat plate 171, and the flange 174. Is configured. Note that the illustration of the brake, generator, cable, etc. of the wind turbine device is omitted.

  The vibration damping device 160 is a plurality of vibration-proof rubbers (three in the present embodiment, two of which are shown in the drawing) that are mounted on the peripheral edge of the upper surface of the flange 174. 161 and a weight member 162 mounted on and mounted on the anti-vibration rubber 161. The cylindrical member made of metal is applied to the weight member 162 as in the first embodiment. Further, as in the first embodiment, the distance d110 in the horizontal direction between the outer peripheral surface 180a of the cable housing member 180 and the peripheral surface 162b of the through hole 162a of the weight member 162 is such that the cable can be accommodated even if the weight member 162 vibrates normally. The distance d120 is sufficient to avoid contact with the member 180, and the horizontal distance d120 between the outer periphery of the weight member 162 and the inner wall of the pole 31 is not in contact with the pole 31 even if the weight member 162 vibrates normally. With enough distance. Note that the relationship between the distance d110 and the distance d120 is d110 <d120 in this example. In addition, with regard to the mounting structure between each vibration isolating rubber 161 and the weight member 162 and the mounting structure between each vibration isolating rubber 161 and the flange 174, pins 161p and 161q projecting up and down respectively are provided on the anti-vibration rubber 161. A configuration is adopted in which the pins 161p and 161q are inserted into attachment holes 162c formed at the lower end portion of the weight member 161 and attachment holes 174a formed through the flange 174, respectively.

  In the case of this embodiment as well, in the same way as in the first embodiment, as shown by an imaginary line in FIG. 10, the notification means X2 is configured so that the weight member 162 is normally used when one or more antivibration rubbers 161 are abnormal. The inner peripheral surface 162b of the weight member 162 comes into contact with the outer peripheral surface 180a of the cable housing member 180 to generate a contact sound, and the contact sound causes the abnormality of the anti-vibration rubber 161 to the outside. It is designed to let you know. Even in the wind turbine generator having such a configuration, the same effect as in the first embodiment can be obtained by providing the notification means X2 as described above. If the distance d110 and the distance d120 are adjusted as appropriate, for example, d110> d120, the weight member 162 can be brought into contact with the inner wall of the pole 31 as the notification means X2 to generate a contact sound.

  In addition, the present invention is not limited to the above-described first embodiment and its modifications and the second embodiment, for example, as a weight member of a vibration damping device, in addition to a cylindrical shape, a solid columnar shape, Various shapes such as a crescent shape, a C-shape, and a semicircular shape in a horizontal sectional view by cutting out a part of a cylinder, a prismatic shape, a rectangular tube shape, and the like are possible. Furthermore, in the case of a cylindrical weight member, it is possible to arrange a cable housing member inside, but when applying a weight member of a shape that cannot adopt such a configuration, the weight member and the attachment mechanism Appropriate changes are possible, such as arranging the cable housing member between the support post and the cover member, or adopting a configuration in which the cable housing member is not provided, and contact the weight member in response to such a change. Thus, a member that functions as a notification unit can be appropriately determined.

  <Third Embodiment> Furthermore, in the present invention, it is possible to adopt another aspect for the vibration damping device. FIG. 11 is a schematic diagram showing a vibration damping device 260 that can be employed as the third embodiment of the present embodiment and its surrounding parts. Also in this embodiment, the same members as those in the above-described embodiments will be described using the same reference numerals. The vibration damping device 260 includes a weight member 262 having a cylindrical shape with a horizontal cross section as in the first embodiment and the second embodiment, and an elastic member attached to the upper end of the weight member 262. And a plurality of (in the illustrated example, four) wires 261 in the form. For these wires 261, for example, steel wires can be used, and the lower ends thereof can be fixed to the weight member 262 with bolts or the like, for example. The upper end portion of the wire 261 can be appropriately fixed to the upper flat plate 73 of the attachment mechanism 7 as shown in the first embodiment, for example. Thus, by using an inexpensive wire 261 as the elastic member, it is possible to contribute to a reduction in the manufacturing cost of the wind turbine generator. Here, the natural frequency of the vibration damping device 260 is determined by the period in which the weight member 262 is swung in the horizontal direction (the natural frequency is expressed by 1 / 2π√g / l in the case of a single pendulum, for example). G: acceleration of gravity, l: length of the wire 261). The damping of the vibration damping device 260 is adjusted by the number of wires 261, the number of stranded wires, and the twisting condition. In addition, the cable housing member 8 is disposed in the through hole 262a of the square cylindrical weight member 262 as in the first embodiment.

  In the case of a wind turbine generator equipped with such a vibration damping device 260, as the notification means X3, when a part of the wire 261 that is an elastic member deteriorates or breaks, as shown by an imaginary line in FIG. Is greatly vibrated exceeding the original amplitude, so that the outer peripheral surface 262d of the weight member 262 comes into contact with the support column 172 of the attachment mechanism 170 to generate a contact sound. In the present embodiment as well, as in the above-described embodiments, the configuration of the wind power generator itself can be used to notify the abnormality of the wire 261 to the outside by this contact sound without adding a special device or member. It becomes possible. Further, as the member with which the weight member 262 comes into contact, the cable housing member 8 can be applied in addition to the column 172, or both the column 172 and the cable housing member 8 can be applied.

  In addition, although not shown in figure, the damping device 260 of such 3rd Embodiment can be arrange | positioned inside the pole 3 like 2nd Embodiment, for example. In this case, it is possible to employ a configuration in which the weight member 262 is suspended by fixing the upper end portion of the wire 261 to, for example, the flange 34 disposed at the upper end of the pole 3 or the lower flat plate 71 of the attachment mechanism. In that case, the pole 31 or the like can be applied as a member that contacts the weight member 262 when the wire 261 is deteriorated or broken. Further, as the weight member 262, a rectangular tube-shaped member or a solid columnar member can be employed, and a column as a member that contacts the weight member 262 when the wire 261 is deteriorated or broken. In addition to 72 and the cable housing member 8, an appropriate member disposed near the weight member 262 such as the cover member 9 or the pole 31 can be applied.

  The present invention is not limited to the above-described embodiments. For example, as the elastic member that is a constituent member of the vibration damping device, the vibration-proof rubber 61 and the wire 261 are applied in the above embodiments. However, in addition to these, the elastic member itself includes a spring and the like. Any member having elasticity and internal damping can be used as appropriate. In addition to the cable housing member, the mounting mechanism column, and the support pole, the member that contacts the weight member as the notification means, other members constituting the mounting mechanism and the support body, and the mounting mechanism An appropriate member arranged around or near the weight member, such as a cover member that hides etc., can be used. Furthermore, the notifying means is not limited to an aspect in which deterioration or breakage of the elastic member is notified to the outside by the sound that the weight member and other members come into contact with, but electrical means by a piezoelectric element or a switch and an appropriate electric device, It is also possible to use a means for utilizing a chemical change caused by contact between chemical substances or a means for utilizing a mechanical element such as a link mechanism. In addition, the specific configuration of each part is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.

The side view which shows the wind power generator which concerns on 1st Embodiment of this invention. The top view which shows the same wind power generator seen from the Z direction shown in FIG. The perspective view which expands and shows the A section of FIG. 1 in detail. FIG. 4 is a side view showing a portion B of FIG. The partially broken side view explaining the function of an alerting | reporting means corresponding to FIG. The perspective view which shows the modification of the damping device of 1st Embodiment corresponding to FIG. The longitudinal cross-sectional view which shows the modification. The longitudinal cross-sectional view which shows the other modification of the damping device of 1st Embodiment. The perspective view which shows the periphery site | part of the damping device in the wind power generator concerning 2nd Embodiment of this invention corresponding to FIG. The longitudinal cross-sectional view which shows the periphery site | part of the vibration damping device. The longitudinal cross-sectional view which shows the periphery site | part of the damping device of the wind power generator which concerns on 3rd Embodiment of this invention.

Explanation of symbols

1 ... Wind turbine generator (windmill device)
DESCRIPTION OF SYMBOLS 2 ... Windmill 3 ... Support body 6,6 ', 160,260 ... Vibration control device 7,170 ... Mounting mechanism 8 ... Cable accommodating member 9 ... Cover member 21 ... Windmill blade 23 ... Rotor (rotating shaft)
61, 161 ... Anti-vibration rubber (elastic member)
62, 62 '... weight member, weight member body 261 ... wire (elastic member)
X1, X1 ', X2, X3 ... notification means

Claims (8)

The present invention is applied to a windmill device including a windmill including a windmill blade that generates torque by receiving wind and a rotating shaft that supports the windmill blade, and a support body that supports the windmill, and part of the support body. A damping device to be attached,
Deteriorating the elastic member by comprising a weight member that suppresses vibration of the windmill and an elastic member that supports the weight member, and the weight member is in contact with another member disposed in the vicinity of the weight member. Alternatively, a wind turbine vibration damping device comprising a notifying means for notifying damage to the outside. 2. The wind turbine damping device according to claim 1, wherein the notification unit notifies the deterioration or breakage of the elastic member to the outside by a contact sound between the weight member and the other member. The informing means is an electric informing mechanism for electrically informing the outside of deterioration or breakage of the elastic member by contact of the weight member and the other member, or deterioration of the elastic member by chemical change. Alternatively, a chemical notification mechanism that notifies the outside of the damage, or a mechanical notification mechanism that notifies the deterioration or breakage of the elastic member to the outside by mechanically operating the other member or a member connected to the other member. The vibration damping device for wind turbines according to claim 1, wherein the vibration damping device is composed of any one type of mechanism or a combination of a plurality of types of mechanisms. The other member is a member constituting an attachment mechanism for attaching the vibration damping device including the weight member and an elastic member to a part of the support, a cable housing member for inserting cables connected to the windmill, A cover member that covers the vibration damping device including the weight member and the elastic member from the outside, and a member that constitutes a part of the support, or any one member or a combination of a plurality of members. Item 4. The wind turbine damping device according to any one of Items 1 to 3. 4. The wind turbine according to claim 1, wherein the other member is a plurality of columnar members that are provided in a vertical posture on a support plate that is attached to the support and on which the elastic member is placed or suspended. Damping device. The weight member has an annular horizontal cross-sectional shape with a hole through which a central portion passes vertically, and as the other member, a vertical posture is attached to a support plate that is attached to the support body and mounts or suspends the elastic member A plurality of columnar members provided in the cable and a cable housing member through which cables connected to the wind turbine are inserted, the plurality of columnar members are arranged around the weight member, and the cable housing member is The vibration damping device for windmills according to any one of claims 1 to 3, wherein the vibration damping device is disposed through the hole of the weight member. The windmill according to any one of claims 4 to 6, wherein when the other member is composed of a plurality of types of members or a plurality of members, all the other members are disposed at substantially the same distance from the weight member. Vibration control device. A wind turbine comprising the vibration damping device for a wind turbine according to any one of claims 1 to 7, a wind turbine blade that receives wind to generate torque, and a rotary shaft that supports the wind turbine blade, and supports the wind turbine. A windmill device comprising: a support body attached to a part of the vibration damping device for windmills.

Images