CN112253407A

CN112253407A - Typhoon-resistant device of wind driven generator

Info

Publication number: CN112253407A
Application number: CN202011260683.6A
Authority: CN
Inventors: 王江乔; 马金国; 李爽; 付厚
Original assignee: Shanghai Electric Wind Power Group Co Ltd
Current assignee: Shanghai Electric Wind Power Group Co Ltd
Priority date: 2020-11-12
Filing date: 2020-11-12
Publication date: 2021-01-22
Anticipated expiration: 2040-11-12
Also published as: CN112253407B

Abstract

The invention discloses an anti-typhoon device of a wind driven generator, which comprises: the center of the chassis is provided with an installation opening allowing a tower barrel of the wind driven generator to pass through, and the chassis is provided with an annular track surrounding the installation opening; the inhaul cable is used for connecting the blades of the wind driven generator; and the number of the cable connecting parts corresponds to that of the blades of the wind driven generator, the cable connecting parts can slide along the annular track, and the cable connecting parts comprise winches and power mechanisms, wherein the winches are used for winding cables, and the power mechanisms are connected to the winches and used for providing rotating power for the winches. The typhoon-resistant device pulls the blades of the wind driven generator through the inhaul cable connecting part which can annularly slide and adjust the pulling force, so that the blades are fixed by following the wind power of typhoon, and the blades of the wind driven generator are prevented from being damaged.

Description

Typhoon-resistant device of wind driven generator

Technical Field

The invention relates to the field of wind power generation, in particular to a typhoon resistant device of a wind driven generator.

Background

With the continuous development of offshore wind turbines, how to resist the damage of typhoon to the wind turbine becomes more and more important. When typhoon passes through, the change of the size and the direction of the wind is constant, and great static load and dynamic load are brought to a fan, particularly to blades.

More and more fans have adopted various techniques to reduce the hazards of typhoons. For example, to reinforce the tower and other components of the wind turbine, or to modify the structure of the blades, etc.

However, typhoons are clearly seasonal, so it is desirable that the countermeasures against typhoons do not affect or affect too much the performance of the wind turbine at ordinary times.

Disclosure of Invention

The invention aims to provide a typhoon-resistant device of a wind driven generator, which aims to avoid the damage of typhoon to the blades of the wind driven generator under the condition of not influencing the ordinary wind power generation capacity of the wind driven generator.

The invention solves the technical problems through the following technical scheme:

an anti-typhoon device of a wind power generator, comprising:

the center of the chassis is provided with an installation opening allowing a tower barrel of the wind driven generator to pass through, and the chassis is provided with an annular track surrounding the installation opening;

the inhaul cable is used for connecting the blades of the wind driven generator; and

the number of the cable connecting portions corresponds to the number of the blades of the wind driven generator, the cable connecting portions can slide along the annular rail, and each cable connecting portion comprises a winch and a power mechanism, wherein the winch is used for winding a cable, and the power mechanism is connected to the winch and used for providing rotating power for the winch.

In this scheme, but this anti typhoon device holds aerogenerator's blade through annular slip and tensile cable connecting portion of adjustable to follow the fixed blade of the wind-force of typhoon, avoid damaging aerogenerator's blade.

Preferably, the anti-typhoon device further comprises a support member provided under the chassis.

Preferably, the chassis includes a plurality of constituent members detachably connected in a circumferential direction.

In this scheme, the chassis can be dismantled for aerogenerator's tower section of thick bamboo to can be in non-typhoon weather, demolish anti typhoon device.

Preferably, the cable connecting portion further includes a first bracket to which the winch is rotatably supported, and a bottom of the first bracket is provided with a first pulley engaged with the endless track.

Preferably, the cable connecting portion further comprises a second bracket, the power mechanism is fixed to the second bracket, and a second pulley engaged with the annular rail is arranged at the bottom of the second bracket.

Preferably, the endless track includes a first track and a second track, the first pulley being engaged with the first track, and the second pulley being engaged with the second track.

Preferably, the first rail has a channel-shaped configuration having an upper surface and a lower surface, and the first pulley is engaged between the upper surface and the lower surface.

In the scheme, the first pulley is clamped on the groove-shaped first rail, so that the first pulley is prevented from being separated from the first rail.

Preferably, a plurality of the cable connecting portions are fixed to each other.

In this scheme, through with a plurality of cable connecting portion reciprocal anchorage together for the stress point is concentrated.

Preferably, a torque sensing unit is arranged in the power mechanism, and the power mechanism provides power for the winch according to the torque detected by the torque sensing unit.

In this scheme, through the moment of torsion that detects, can judge whether representing the blade vibration and surpassing safe threshold to adjust the pulling force of cable through power unit, avoid excessive vibration to cause the harm to the blade.

Preferably, the power mechanism is a torque motor, and a rotating shaft of the torque motor is connected to the winch through a transmission shaft.

The positive progress effects of the invention are as follows: the typhoon-resistant device pulls the blades of the wind driven generator through the inhaul cable connecting part which can annularly slide and adjust the pulling force, so that the blades are fixed by following the wind power of typhoon, and the blades of the wind driven generator are prevented from being damaged.

Drawings

Fig. 1 is a schematic view showing a structure in which an anti-typhoon apparatus of a wind power generator according to an embodiment of the present invention is mounted to the wind power generator.

Fig. 2 is a schematic structural view of an anti-typhoon apparatus according to an embodiment of the present invention.

Fig. 3 is a schematic cross-sectional view of a chassis according to an embodiment of the present invention.

Fig. 4 is a cross-sectional view schematically showing a cable connecting portion according to an embodiment of the present invention.

Fig. 5 is a structural view illustrating a connection portion of a stay cable and a blade according to an embodiment of the present invention.

Description of reference numerals:

wind power generator 100

Tower 110

Blade 120

Perforation 121

Flange 122

Typhoon-resistant device 200

Chassis 210

First track 211

Upper surface 213

Lower surface 214

Mounting opening 215

Second rail 217

Support leg 220

Cable 230

Cable connecting part 240

Power mechanism 241

Winch 242

Drive shaft 243

First support 244

Second bracket 245

First pulley 246

Second pulley 247

Speed regulator 248

Detailed Description

The present invention is further illustrated by way of example and not by way of limitation in the scope of the embodiments described below in conjunction with the accompanying drawings.

As shown in fig. 1 to 5, the anti-typhoon apparatus 200 of the wind power generator 100 includes: chassis 210, cable 230, and cable connection 240.

The center of the chassis 210 is provided with a mounting opening 215 for allowing the tower 110 of the wind turbine 100 to pass through, and the chassis 210 is provided with an annular rail surrounding the mounting opening 215. In the present embodiment, the bottom plate 210 is a circular ring, but the present invention is not limited thereto, and the shape of the bottom plate 210 may be set as needed as long as the function of the bottom plate 210 is not affected.

The anti-typhoon apparatus 200 further includes a support member provided under the chassis 210. In this embodiment, the supporting members are three legs 220 connected to the chassis 210, and the lower ends of the legs 220 are fixed to the ground by welding or the like.

The chassis 210 includes a plurality of constituent members detachably connected in a circumferential direction. The connection structure between the constituent members is not shown in the drawings. Preferably, the bottom plate 210 is constructed of two semicircular constituent members. The components can be connected and fixed by various existing connecting structures, which are not described in detail herein.

The chassis 210 may be removable with respect to the tower 110 of the wind turbine 100 so that the anti-typhoon apparatus 200 may be removed in non-typhoon weather.

The number of the cable connection portions 240 corresponds to the number of the blades 120 of the wind turbine 100. This correspondence generally refers to the same number. The cable connecting portion 240 is capable of sliding along a circular track, and the cable connecting portion 240 includes a capstan 242 and a power mechanism 241, the capstan 242 being for winding the cable 230, and the power mechanism 241 being connected to the capstan 242 and for providing a rotational power to the capstan 242.

The cable connecting portion 240 further includes a first bracket 244, the winch 242 is rotatably supported to the first bracket 244, and a first pulley 246 engaged with the endless track is provided at the bottom of the first bracket 244.

The cable connecting portion 240 further includes a second bracket 245, the power mechanism 241 is fixed to the second bracket 245, and a second pulley 247 engaged with the endless track is provided at the bottom of the second bracket 245.

The endless track includes a first track 211 and a second track 217, a first pulley 246 is engaged to the first track 211, and a second pulley 247 is engaged to the second track 217.

The first rail 211 is a channel-shaped structure having an upper surface 213 and a lower surface 214, and a first pulley 246 is engaged between the upper surface 213 and the lower surface 214. The first pulley 246 is clamped on the groove-shaped first rail 211 to prevent the first pulley 246 from falling off the first rail 211.

Alternatively, the second rail 217 may be provided in the same groove structure as the first rail 211. Of course, the second rail 217 may be a general flat rail.

Alternatively, the first bracket 244 may be fixedly connected to the second bracket 245 by a connecting member or the like to prevent the power mechanism 241 from moving relative to the winch 242.

The plurality of cable connection parts 240 are fixed to each other. The fixing mode can adopt the existing bolt connection, welding and other modes.

By fixing the plurality of cable connecting portions 240 to each other, the stress points are concentrated.

The power mechanism 241 is provided with a torque sensing unit, and the power mechanism 241 provides power for the winch 242 according to the torque detected by the torque sensing unit.

Through the detected torque, whether the vibration of the blade 120 exceeds a safety threshold can be judged, so that the tension of the inhaul cable 230 is adjusted through the power mechanism 241, and the blade 120 is prevented from being damaged by excessive vibration.

The power mechanism 241 may be a torque motor having a torque sensing module, and a rotation shaft of the torque motor is connected to the winch 242 through a transmission shaft 243. A speed governor 248 is also provided between the torque motor and the winch 242.

Guy wires 230 are used to connect blades 120 of wind turbine 100. The blade 120 is provided with a through hole 121 allowing the pulling cable 230 to pass through, and a flange 122 is arranged in the through hole 121. In the absence of typhoon weather, a cover plate covers the through hole 121 to prevent the performance of the blade 120 from being affected. The cover plate is fixed to the through-hole 121 by a flange 122.

The installation steps and the operation of the anti-typhoon apparatus 200 are described below.

At the onset of a typhoon season, the anti-typhoon apparatus 200 and the dedicated installation vessel are prepared.

When the forecasted typhoon passes through the wind field, the installation ship is sent out to install the typhoon resistant device 200.

Chassis 210 is mounted around tower 110 of wind turbine 100, and chassis 210 is then fixed relative to the ground by fixing support members.

The guy wires 230 are connected to the blades 120. The cables 230 for the blades 120 are installed one at a time. Brackets should be present on the dedicated installation vessel to prevent the guy wires 230 from touching the other blades 120. When one blade 120 is installed, the rotor is turned and the next blade 120 is installed. And repeating the steps until the installation is finished.

After the installation is completed, the rotor of the wind turbine 100 is locked.

After the entire installation is completed, the torque motor is started to provide a certain tension to the cable 230.

After the inspection is completed, the dedicated installation vessel is evacuated or the installation of the next wind turbine 100 anti-typhoon apparatus 200 is started.

When a typhoon occurs, the blade 120 rotates around the axial direction of the tower 110 along with the wind direction, and the cable connecting portion 240 slides annularly along with the blade 120 under the pulling force of the cable 230. Meanwhile, the typhoon may cause the blade 120 to vibrate. The torque motor senses the torque magnitude information and the torque change frequency information on the rotating shaft, determines whether unacceptable vibration occurs on the blade 120 according to the torque magnitude information and the torque change frequency information, the vibration may damage the blade 120, if the unacceptable vibration occurs on the blade 120, starts a vibration damping action, for example, the torque motor provides a larger torque to the winch 242 to counteract the vibration, and if the unacceptable vibration does not occur on the blade 120, the torque motor maintains the current torque.

The anti-typhoon apparatus 200 holds the blade 120 of the wind power generator 100 by the guy cable connection part 240 which is annularly slidable and adjustable in tension, thereby fixing the blade 120 in conformity with the wind force of the typhoon and avoiding damage to the blade 120 of the wind power generator 100.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications are within the scope of the invention.

Claims

1. An anti-typhoon device of a wind power generator, characterized in that it comprises:

the number of the cable connecting portions corresponds to the number of the blades of the wind driven generator, the cable connecting portions can slide along the annular rail, and each cable connecting portion comprises a winch and a power mechanism, wherein the winch is used for winding the cable, and the power mechanism is connected to the winch and used for providing rotating power for the winch.

2. An anti-typhoon device of a wind power generator according to claim 1, characterised in that it further comprises a support member provided under the chassis.

3. An anti-typhoon device of a wind power generator according to claim 1, characterised in that the chassis comprises a plurality of constituent members detachably connected in the circumferential direction.

4. The anti-typhoon device of the wind power generator as claimed in claim 1, wherein the cable connecting portion further comprises a first bracket to which the winch is rotatably supported, a bottom of the first bracket being provided with a first pulley engaging with the endless track.

5. The anti-typhoon device of the wind power generator as claimed in claim 4, wherein the cable connecting portion further comprises a second bracket, the power mechanism is fixed to the second bracket, and a second pulley engaged with the endless track is provided at the bottom of the second bracket.

6. The anti-typhoon apparatus of a wind power generator as claimed in claim 5, wherein the endless track comprises a first track and a second track, the first pulley being engaged with the first track, the second pulley being engaged with the second track.

7. An anti-typhoon device according to claim 6, characterised in that said first rail is of a channel-shaped configuration having an upper surface and a lower surface, said first pulley being engaged between said upper and lower surfaces.

8. An anti-typhoon device of a wind power generator according to claim 1, wherein a plurality of said cable connection portions are fixed to each other.

9. The anti-typhoon device of wind power generator according to claim 1, wherein a torque sensing unit is provided in said power mechanism, and said power mechanism powers said winch according to the torque sensed by said torque sensing unit.

10. An anti-typhoon device of wind power generator according to claim 9, wherein said power mechanism is a torque motor, and a rotation shaft of said torque motor is connected to said winch through a transmission shaft.