JPH06257555A - Method and device for tying blade in place in wind power generator - Google Patents

Abstract

PURPOSE:To provide a method and a device for tying blades in place in a wind power generator, whereby wind power generator blades can be installed and removed in a short time through operations done at a high place and without using large equipment. CONSTITUTION:A device for tying blades in place includes a nacelle 2 provided at the upper and of a long tower 1, having a built-in generator, and being horizontally rotatable; a plurality of blades 3 each of which rotates about an almost horizontal axis H and is removably secured to a hub 4 for driving the generator; and blade tying devices 10, 20 for securing the blades in place along the tower. The nacelle 2 is rotated to stop each of the plurality of blades 3 along the tower, and the blades 3 are secured to the tower using the blade tying devices and then separated from the hub 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for securing blades in a wind turbine generator.

[0002]

2. Description of the Related Art A wind power generator is a device for generating power by infinitely existing wind power, and since it is non-polluting, it is attracting attention from the viewpoint of protecting the global environment, and its size is gradually increasing. In such a wind turbine generator, for example, as shown in FIG. 4, a nacelle 2 capable of turning horizontally is provided at the upper end of a high tower 1, a generator is placed in the nacelle, and the nacelle rotates about a lateral axis. The blade 3 drives a generator to generate electricity.

Such a wind turbine generator generally has a large size because the wind energy density is low. For example, in the wind turbine generator with a rated output of 300 KW (wind speed 13 m / s) shown in FIG. The height is 30 m and the blade diameter is about 30 m.

[0004]

Such a wind turbine generator is designed to be capable of generating a rated output with a normal wind of 10 to 15 m / s. However, the actual wind fluctuates greatly depending on the season and time, and sometimes 50 m / s.
The above may be reached. If the wind power generator is used during such strong winds, the blade may rotate at an allowable rotation speed or higher due to the strong wind, and the blade may be damaged by centrifugal force.Therefore, conventionally, use of the wind power generator is stopped during normal strong winds. And fix the blade with a brake (lock)
Was.

Further, for example, in the case of a typhoon, the wind speed is 60 m.
The maximum wind speed may be 80 m / s or more, especially on an isolated island where typhoons frequently come. In such a strong wind, even if the blade is locked, the strong wind causes the blade to flutter and vibrate violently.
The blade may be damaged. Therefore, conventionally, when a typhoon approaches, the blade is removed from the device and stored in a weak wind portion (for example, near the ground surface). But,
Installation and removal work of such blades are large and heavy, especially in large wind turbine generators,
There is a problem in that large equipment such as a crane is required, the work takes time, and a lot of work is performed in high places, which is dangerous.

The present invention was devised to solve such problems. That is, an object of the present invention is to provide a blade staking method and device capable of attaching and detaching a blade of a wind turbine generator in a short time and with a small amount of work at a high place without using large equipment. Especially.

[0007]

According to the present invention, there is provided a nacelle provided at the upper end of a slender tower, having a generator mounted therein, and horizontally swingable; A plurality of blades removably fixed to a hub that drives the machine; and a blade lashing device that fixes each blade along the tower, and the nacelle is swung for each of the plurality of blades. A method for securing blades in a wind turbine generator, characterized in that the blades are stopped along the tower, the blades are secured to the tower by the blade securing device, and then the blades are separated from the hub.

Further, according to the present invention, there is provided a blade lashing device comprising a lashing arm and a supporting arm, wherein one end of the lashing arm is pivotally mounted near the upper end of the tower by a horizontal first pin,
The other end of the securing arm is swingably provided between a retracted position along the tower and a secured position away from the tower, and one end of the support arm is horizontal to the tower at a position spaced from the upper end. And the other end of the support arm is swingably provided between a retracted position along the tower and a lashing position away from the tower.
A horizontal third pin is attached to the other end of the securing arm, and the third pin is slidably fitted in an elongated slot provided in the support arm. The blade lashing device in a wind turbine generator is provided, wherein the lashing arm has a connecting portion of blades stopped along the tower and a lashing plate that is detachable. Furthermore, a swinging device that swings the securing arm from the retracted position to the securing position, and an arm fixing device that fixes the other end of the securing arm and the other end of the support arm at the securing position to each other. Preferably, it is provided.

Furthermore, according to the present invention, there is provided a blade fastening device comprising two holding arms, one end of the holding arm is pivotally attached to the tower by a vertical fourth pin, and the other end of the holding arm is the tower. Is configured to hold the blades stopped along and are connected to each other by a fifth pin, wherein the holding arm has a storage position located along the circumferential direction of the tower and a holding position for holding the blades. There is provided a blade fastening device in a wind turbine generator, characterized in that it can be swung about the fourth pin. It is preferable that a lashing belt that wraps around the blade and lashes it is directly and detachably attached to the other end of the holding arm. Further, it is preferable that an elastic member is fixed to the other end of the holding arm that holds the blade.

[0010]

According to the first aspect of the present invention, for each of the plurality of blades, the nacelle is swung to stop the blades along the tower, and the blades are fixed to the tower by a blade lashing device. Thus, the blade can be fixed to the tower in a short time without using large equipment and with almost no work at a high place. The nacelle turning mechanism and the blade inching mechanism are originally provided in the wind turbine generator, and the blades can be stopped accurately along the tower by operating them. Therefore,
By fixing the blade to the tower with the blade securing device, the blade can be easily fixed so as to withstand strong wind such as typhoon.

Then, the blade is separated from the hub, the nacelle is swung again, and another blade is stopped along the tower by the inching mechanism of the blade, and the blade is fixed to the tower by the blade securing device. If this is performed for each of the plurality of blades, all the blades can be fixed to the tower so as to withstand strong wind such as typhoon. According to the second aspect of the present invention, the blade lashing device includes a lashing arm and a supporting arm, one end of the lashing arm is pivotally attached to the vicinity of the upper end of the tower by a horizontal pin, and the other end of the lashing arm is A horizontal pin is attached to the support arm, and the pin is fitted into an elongated slot provided in the support arm, and the securing arm is detachable from the connecting portion of the blade stopped along the tower. Since it has a plate, by swinging the lashing arm and the support arm from the retracted position to the lashing position and fixing the blade connecting part to the lashing plate, it is possible to use for a short time without using a large facility such as a crane. Further, the blade can be fixed with a small amount of work at a high place.

According to a third aspect of the present invention, the blade fastening device is composed of two holding arms, one end of the holding arm is pivotally attached to the tower by a vertical pin, and the other end of the holding arm is the tower. The blades stopped along the line are sandwiched, and the blades are connected to each other by the fifth pin.
Since it is possible to swing around the pin between the retracted position located along the circumferential direction of the tower and the sandwiched position for sandwiching the blade, the sandwiching arm is horizontally swung from the retracted position to the securing position. By thus sandwiching the blade, it is possible to fix the blade in a short time and with a small amount of work at a high place without using a large facility such as a crane.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is an overall side view of a wind turbine generator that implements a method for securing blades according to the present invention. In this figure, a wind turbine generator includes a nacelle 2 provided at an upper end of a slender tower 1 and a hub 4 for driving a generator (not shown).
A plurality of blades 3 that are detachably fixed to the blade, and a blade staking device 10 that fixes each blade 3 along the tower 1.
And 20 are provided.

The lower end (not shown) of the tower 1 is fixed to the ground and is supported so as to sufficiently withstand strong winds such as typhoons. The nacelle 2 can be horizontally swung by a swivel device (not shown) around a vertical axis V, and a gearbox, a generator, a control device, etc. are stored inside. This turning device is used to adjust the blade 3 to the wind direction during normal power generation. The hub 4 is configured to rotate about a horizontal axis (actually, for example, 0 to 10 ° with respect to the horizontal) about an axis H to drive a generator. 2-3 around this hub 4
One or more blades 3 are radially mounted. The hub 4 can perform an inching operation (inching) for maintenance or the like. Further, the blade 3 can be rotated about its longitudinal axis, and can have an appropriate elevation angle with respect to the wind direction. When the wind hits the blade 3 and lift force is generated on the blade 3, the lift force causes the hub 4 to rotate, and the generator is rotationally driven via the speed increaser to generate electricity.

The blade lashing device includes a hub 4 of the blade 3.
It is composed of a connecting portion securing device 10 for fixing the connecting portion with and a blade portion securing device 20 for sandwiching the blade portion.

FIG. 2 is a partially enlarged view of the connecting portion securing device 10. In this figure, a blade lashing device or coupling lashing device 10 includes a lashing arm 12 and a support arm 14.
And one end of the lashing arm 12 is pivotally connected to the upper end of the tower by a horizontal first pin 11, and the other end of the lashing arm 12 is a lashing position along the tower 1 and a lashing away from the tower 1. It is swingable between the positions. Further, one end of the support arm 14 is pivotally attached to the tower 1 at a position spaced from the upper end by a horizontal second pin 13, and the other end of the support arm 14 is separated from the storage position along the tower 1 and the tower 1. It is provided to be swingable between the fastening positions. Further, a horizontal third pin 15 is attached to the other end of the securing arm 12, and the third pin 15 is slidably fitted in an elongated slot 14a provided in the support arm 14. I am fit. Further, the securing arm 12 is connected to the connecting portion 3 of the blade 3 stopped along the tower.
A (that is, a flange in the drawing) and a securing plate 16 that is detachable. The connection between the lashing plate 16 and the flange is
For example, bolts and nuts are used.

Further, in the blade lashing device of FIG. 2, a swinging device 17 for oscillating the lashing arm 12 from the retracted position to the lashing position, the other end of the lashing arm 12 in the lashing position and the support arm 14 are provided. Arm fixing device 18 for fixing the other end of the arm to each other. The rocking device 17 is, for example, a hydraulic cylinder, and the cylinder side is pivotally attached to the tower 1 as shown in the drawing.
The rod side is pivotally attached to a part of the lashing arm 12, and the expansion and contraction of the rod can swing the lashing arm 12 between its retracted position and the lashed position. Arm fixing device 18
Is a stopper plate which is fixed to the support arm 14 with a bolt or the like, and the third pin 1 is fixed at the securing position.
5 so that 5 cannot slide in the slot 14a.
By fixing to the lashing arm 1 at the lashing position
The other end of 2 and the other end of the support arm 14 can be fixed to each other.

With the above structure, the securing arm 12 and the support arm 14 are swung from the retracted position to the secured position,
By fixing the connecting portion 3a of the blade to the securing plate 16, it is possible to fix the blade in a short time and with a small amount of work at a high place without using a large facility such as a crane.

FIG. 3 is a sectional view of the blade securing device 20 taken along the line AA in FIG. 1, and shows only one blade securing device. In this figure, the blade securing device, namely the blade portion securing device 20, is composed of two clamping arms 22, one end of which is pivotally attached to the tower 1 by a vertical fourth pin 21. The other end of the blade is configured to hold the blade 3 stopped along the tower 1. The two holding arms 22 hold the blade 3 by being connected to each other by a fifth pin 23. Also, each holding arm 22
Can swing about the fourth pin 21 between the storage position located along the circumferential direction of the tower 1 and the sandwiching position for sandwiching the blade 3, and the fifth pin at the storage position. Can be fixed.

With such a structure, the clamping arm is horizontally swung from the retracted position to the securing position to clamp the blade, thereby eliminating the need for large equipment such as a crane.
The blade can be fixed in a short time and with a small amount of work at a high place. Further, at the other end of the holding arm 22 of the blade securing device 20 of FIG. 3, a securing belt 24 that surrounds and secures the blade 3 is directly detachably attached. Thereby, the blade 3 can be firmly fixed to the tower 1 by the fastening belt 24. Further, the holding arm 22 has an elastic member 25 made of rubber or the like at the other end for holding the blade 3.
Is fixed. Thereby, the blade 3 can be firmly fixed to the tower 1 without being scratched.

A method for securing the blade using the above-mentioned device will be described below. First, for each of the plurality of blades 3, the nacelle 2 is swung to stop the blades 3 along the tower 1, and the blades 3 are fixed to the tower 1 by the blade securing devices 10 and 20. As a result, the blade 3 can be fixed to the tower 1 in a short time and with almost no work at a high place without using large equipment.

The blade 3 is then separated from the hub 4,
The nacelle 2 is swung again, and another blade 3 is stopped along the tower 1 by the inching mechanism of the blade 3, and the blade 3 is fixed to the tower by the blade fastening devices 10 and 20. If this is performed for each of the plurality of blades 3, all the blades 3 can be fixed to the tower so as to withstand a strong wind such as a typhoon.

[0023]

As described above, according to the first aspect of the present invention, all the blades are installed along the tower without using large equipment, in a short time, and with almost no work at height. It can be fixed, and the blade can be fixed so as to withstand strong wind such as typhoon. Further, according to the second aspect of the present invention, by swinging the lashing arm and the support arm from the retracted position to the lashing position and fixing the connecting portion of the blade to the lashing plate, large equipment such as a crane can be provided. It is possible to fix the blade in a short time and with a small amount of work at a high place without using the blade. Furthermore, according to the third aspect of the present invention, by horizontally swinging the clamping arm from the retracted position to the lashing position to clamp the blade, a large amount of equipment such as a crane is not used, and a short time is required. Moreover, the blade can be fixed with a small amount of work at a high place.

Therefore, according to the blade securing method and device of the wind power generator of the present invention, the blade of the wind power generator can be attached and detached without using a large facility.
It is possible to obtain an excellent effect that the work can be performed in a short time with a small amount of work at a high place.

[Brief description of drawings]

FIG. 1 is an overall side view of a wind turbine generator that implements a blade lashing method according to the present invention.

FIG. 2 is a partially enlarged view of the connecting portion fastening device 10 in FIG.

FIG. 3 is a blade portion securing device 2 taken along the line AA in FIG.
It is sectional drawing of 0.

FIG. 4 is an overall configuration diagram of a large wind turbine generator.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 tower 2 nacelle 3 blade 3a blade connecting part 4 hub 10 connecting part securing device 11 first pin 12 securing arm 13 second pin 14 support arm 14a elongated slot 15 third pin 16 securing plate 17 Swinging device 18 Arm fixing device 20 Blade part securing device 21 Fourth pin 22 Clamping arm 23 Fifth pin 24 Secure belt 25 Elastic member

Claims (6)

[Claims] 1. A nacelle provided at an upper end of a slender tower, in which a generator is mounted, and capable of horizontally rotating, and a hub which is rotatable about a lateral axis and drives the generator, is detachably fixed. A plurality of blades, and a blade lashing device for fixing each blade along the tower, for each of the plurality of blades, the nacelle is swung to stop the blade along the tower, A method for securing a blade in a wind turbine generator, which comprises fixing the blade to a tower by a blade securing device and then separating the blade from a hub. 2. A blade lashing device comprising a lashing arm and a supporting arm, wherein one end of the lashing arm is pivotally attached to the upper end of the tower by a horizontal first pin, and the other end of the lashing arm is Swingably provided between a retracted position along the tower and a secured position away from the tower, one end of the support arm is pivotally attached to the tower at a position spaced from the upper end by a horizontal second pin, The other end of the support arm is swingably provided between a storage position along the tower and a securing position away from the tower, and a horizontal third pin is attached to the other end of the securing arm. The third pin is slidably fitted in an elongated slot provided in the support arm, and the lashing arm is attached to and detached from the connecting portion of the blade stopped along the tower. A blade lashing device in a wind turbine generator, comprising a free lashing plate. 3. A swinging device for swinging the securing arm from a retracted position to a securing position, and an arm fixing device for fixing the other end of the securing arm and the other end of the support arm to each other in the securing position. The blade fastening device according to claim 2, further comprising: 4. A blade lashing device comprising two clamping arms, wherein one end of the clamping arms is pivotally attached to the tower by a fourth vertical pin.
The other end of the sandwiching arm sandwiches the blade stopped along the tower, and is configured to be connected to each other by a fifth pin, wherein the sandwiching arm is a storage position located along the circumferential direction of the tower, A blade lashing device in a wind turbine generator, wherein the blade lashing device is swingable around a holding position for holding the blade around the fourth pin. 5. The blade lashing device according to claim 4, wherein a lashing belt surrounding and lashing the blades is detachably attached to the other end of the sandwiching arm. 6. The blade fastening device according to claim 4, wherein an elastic member is fixed to the other end of the holding arm that holds the blade.