KR101334339B1 - Blade gripping apparatus for wind turbine - Google Patents

Abstract

A blade gripping device for a wind turbine is disclosed. The blade gripping device for a wind turbine according to an embodiment of the present invention comprises: a main frame connected to multiple crane cables; a gripping unit which is connected to the main frame and grips a blade for a wind turbine; and a crane cable length adjusting unit which is connected to the crane cables and adjusts the length of one or more crane cables among multiple crane cables to adjust the installation angle of the blade.

Description

BLADE GRIPPING APPARATUS FOR WIND TURBINE}

The present invention relates to a blade gripping device for a wind power generator, and more particularly, to a blade gripping device for a wind power generator capable of adjusting an installation angle of a blade with respect to a hub when installing a blade to a hub of a wind power generator. It is about.

Generally, typical types of power generation for generating electricity include thermal power generation using fossil fuel as an energy source and nuclear power generation using nuclear power.

However, thermal power generation has a problem of causing pollution due to utilization of the energy generated by the combustion of fossil fuel and a huge construction cost.

In addition, nuclear power generation is advantageous for producing a large amount of electricity, but it requires huge facility costs to block the radiation leakage and the strong reaction of local residents is expected due to the risk of radiation leakage, and it is not easy to dispose of waste, and it is a minor accident. However, there are various problems, such as always presenting a risk that can cause serious environmental damage.

Therefore, researches are actively conducted to utilize natural energy such as wind power, tidal power, hydroelectric power, and solar energy as an energy source as a permanent energy source free from exhaustion problems due to firepower or nuclear power generation.

In particular, wind power is emerging as an alternative in terms of the use of natural energy among power generation using natural energy. Wind power generation is simple in structure and installation, easy to operate and manage, and unmanned and automated. As a result, the introduction has increased dramatically in recent years.

On the other hand, in the past, wind power structures were mainly made on land, but due to various problems such as environmental damage caused by noise and vibration, increased power generation capacity, and aesthetics and limitations of place, wind farms have recently become intensive. The trend is to build them in groups.

Wind power generator is a device for producing electrical energy from the rotational energy by the wind, a rotor having a hub to which a plurality of blades (blade) rotated by the wind, and a nacelle connected to the rotor ( and a nacelle cover for supporting and protecting the nacelle, and a tower for supporting the blades, the rotor, the nacelle, and the nacelle cover.

The blade uses aerodynamically designed geometry to generate useful aerodynamic torques in the wind energy and generates electricity by rotating the generator using aerodynamic torques.

The blade must be able to support the load induced by its shape structurally as well as aerodynamic shape is important to increase the amount of electricity generated.

The load is dominant in the aerodynamic shape, but designing a blade that is as light as possible while supporting the same load through structural optimization is another important design technique.

On the other hand, the operation of installing the blade in the hub, the blade gripping using a blade gripping device, using a crane or the like transfers the blade gripping device and the blade adjacent to the hub.

At this time, the blade is transported adjacent to the hub in a horizontal state, in the case of installing a plurality of blades in the hub sequentially, after installing one blade to the hub, so that the second blade can be installed in the hub in the horizontal state Rotate

As such, in the related art, in order to install a plurality of blades in sequence, a hub needs to be rotated in a direction in which the blades are inserted.

[Patent 1] Republic of Korea Patent Publication No. 2007-0116190 (Weeven Aloyds) 2007.12.06.

Therefore, the technical problem to be solved by the present invention is to provide a blade gripping device for a wind power generator that can install the blade to the hub by adjusting the installation angle of the blade while fixing the hub.

According to an aspect of the invention, the mainframe is connected to a plurality of crane cables; A gripping unit connected to the main frame and gripping a blade for a wind power generator; And a crane cable length adjusting unit connected to the crane cable, the crane cable length adjusting unit adjusting the length of at least one of the plurality of crane cables to adjust the installation angle of the blade. have.

The plurality of crane cables are connected to both ends of the longitudinal direction of the main frame corresponding to the blade root portion and the tip portion position, respectively, the crane cable length adjusting unit, the blade tip portion to raise and lower the installation angle of the blade To adjust the, it may be connected to the crane cable connected to the longitudinal end portion of the main frame corresponding to the blade tip portion position.

The crane cable length adjustment unit, at least one drum winch wound the crane cable; And a drum winch driving unit configured to drive the drum winch such that the crane cable is wound and unwound on the drum winch.

The gripping unit may include: a root gripping unit connected to one end portion of the main frame corresponding to the blade root portion in a longitudinal direction and for gripping the blade root portion; And a tip gripping unit connected to the other end in the longitudinal direction of the main frame corresponding to the blade tip part position and gripping the blade tip part.

The root gripping unit includes: a root gripper for gripping the blade root portion; And a root gripper rotating module connected to the root gripper to rotate the root gripper to rotate the blade about a central longitudinal axis of the blade.

The root gripper may include a root frame portion into which the blade root portion is inserted; A plurality of root gripping portions provided symmetrically to the root frame portion and gripping the outer surface of the blade root portion while being mutually approached and spaced apart from each other; One end may be connected to the root frame part and the other end may be connected to the root gripping part, and may include a plurality of root gripping drivers for driving the plurality of root gripping parts to be approached and spaced apart from each other.

Each of the plurality of root gripping portions may have one end hinged to the root frame portion, and the other end of the root gripping portion may be slidably coupled to the root frame portion such that the other end thereof is approached and spaced apart by the stretching and contracting operation of the root gripping drive portion. Can be.

The root gripper may be further provided on a surface in contact with the blade root portion of the plurality of root gripping portions, and may further include a root pressure pad for contact pressure of an outer surface of the blade root portion.

The root gripping driving unit may be an actuator having one end connected to the root frame part and the other end connected to the plurality of root gripping parts to extend and contract.

The root gripper rotating module includes a plurality of root lifting cables, one end of which is connected to the root gripper and the other end of which is connected to the main frame, spaced apart from each other; And a root lifting cable length adjusting unit provided on the main frame to adjust the length by winding and unwinding each of the plurality of root lifting cables to rotate the root gripper.

The root lifting cable length adjusting unit may be provided in the main frame and include a driving winch for winding and unwinding each of the plurality of root lifting cables.

The tip gripping unit includes a tip gripper for gripping the blade tip portion; And a tip position control module connected to the tip gripper and adjusting the position of the blade with respect to the main frame by raising and lowering the blade tip portion.

The tip gripper may include a tip frame part in which the blade tip part is seated; A tip gripping part connected to the tip frame part so as to be opposite to the tip frame part and to grip an outer surface of the blade tip part while being approached and spaced apart from the tip frame part; One end is connected to the tip frame portion and the other end is connected to the tip gripping portion, it may include a tip gripping drive for driving the tip gripping portion to approach and spaced apart from the tip frame portion.

The tip gripper supports the tip gripping portion with respect to the tip frame portion, one end of which is connected to the tip gripping portion so that the tip gripping portion is rotatable relative to the tip frame portion, and the other end thereof is the tip frame portion. It may further include a support member rotatably connected to.

The tip gripper may be further provided on a surface of the tip frame portion and the tip gripping portion that is in contact with the blade tip portion, and may further include a tip pressure pad configured to contact and pressurize an outer surface of the blade tip portion.

The tip gripping driving unit may be an actuator having one end connected to the tip frame part and the other end connected to the tip gripping part to extend and contract.

The tip position control module, the transfer cart connected to be transported in the longitudinal direction of the main frame; And a tip gripper position adjusting unit connected to the transport cart to adjust a relative position of the tip gripper with respect to the main frame.

The tip gripper position adjusting unit may include: a tip lifting cable length adjusting unit provided in the transport cart and adjusting the length of the tip lifting cable connected between the transport cart and the tip gripper; And a tip gripper support member having one end connected to the tip gripper and the other end connected to the tip lifting cable, and having one end of the tip lifting cable sliding along the vertical movement of the tip lifting cable and supporting the tip gripper. can do.

The tip lifting cable length adjusting unit may be provided in the transport cart, and may include a driving winch for winding and unwinding the tip lifting cable.

The tip gripper support member may have an arc-shaped slot so that one end of the tip lifting cable slides.

The tip position control module is provided on the main frame, the guide rail for guiding the longitudinal transport of the main frame of the transport cart; And a driving body connected to the transport cart and moving along the guide rail.

Embodiments of the present invention, by adjusting the installation angle of the blade to the hub by adjusting the length of at least one of the plurality of crane cables, it is possible to install the blade on the hub while fixing the hub to shorten the work time according to the blade installation can do.

1 is a front view of a wind turbine, showing a state in which one blade is transported by the blade gripping device for a wind turbine according to an embodiment of the present invention.
Figure 2 is a perspective view showing a blade gripping device for a wind turbine according to an embodiment of the present invention.
3 is an enlarged view of a portion A of FIG. 2, and is a cross-sectional view illustrating a crane cable length adjusting unit of a blade gripping device for a wind turbine according to an embodiment of the present invention.
FIG. 4 is an enlarged view of a portion B of FIG. 2, and is a perspective view illustrating a root gripping unit of a blade gripping device for a wind turbine according to an embodiment of the present invention.
5 is a front view illustrating the root gripper of FIG. 4.
6 is an operating state diagram showing a rotation state of the blade by the operation of the root gripper rotary module of FIG.
FIG. 7 is an enlarged view of portion C of FIG. 2, and is a perspective view illustrating a tip gripping unit of a blade gripping device for a wind turbine according to an embodiment of the present invention.
FIG. 8 is a front view illustrating the tip gripper of FIG. 7. FIG.
9 is an operating state diagram showing the rotation of the blade by the operation of the tip position adjustment module of FIG.
10 to 12 is an operating state diagram showing the blade installation operation by the blade gripping device for a wind turbine according to an embodiment of the present invention.

In order to fully understand the present invention, operational advantages of the present invention, and objects achieved by the practice of the present invention, reference should be made to the accompanying drawings and the accompanying drawings which illustrate preferred embodiments of the present invention.

Hereinafter, the present invention will be described in detail with reference to the preferred embodiments of the present invention with reference to the accompanying drawings. Like reference symbols in the drawings denote like elements.

1 is a front view of a wind turbine, showing a state in which one blade is transported by the wind turbine blade gripping device according to an embodiment of the present invention, Figure 2 is a wind power according to an embodiment of the present invention 3 is a perspective view showing a blade gripping device for a generator, and FIG. 3 is an enlarged view of a portion A of FIG. 2, and is a sectional view showing a crane cable length adjusting unit of the blade gripping device for a wind turbine according to an embodiment of the present invention, and FIG. 4 is an enlarged view of a portion B of FIG. 2, which is a perspective view illustrating a root gripping unit of a blade gripping device for a wind turbine according to an embodiment of the present invention, and FIG. 5 is a front view illustrating the root gripper of FIG. 4, and FIG. 6 is an operating state diagram showing the rotation of the blade by the operation of the root gripper rotary module of Figure 4, Figure 7 is an enlarged view of a portion C of Figure 2, FIG. 8 is a perspective view illustrating a tip gripping unit of a blade gripping device for a wind turbine according to an embodiment, FIG. 8 is a front view illustrating the tip gripper of FIG. 7, and FIG. 9 is a view illustrating the blade by the operation of the tip position adjusting module of FIG. 7. This is an operation state diagram showing the rotation state.

Referring to FIG. 1, the wind power generator is connected to a nacelle (not shown) and rotates according to the rotation of the blades 110 and the blades 110, which are rotated by the wind, but the blades 110 are connected. Rotor 120 having a hub 121, and a tower 140 for supporting the nacelle, the rotor 120 and the blade 110.

Blade 110 is a kind of wing that is rotated by the wind to generate a rotational movement. The blade 110 disposed radially with respect to the rotor 120 has a streamlined wing shape to be easily rotated by the wind.

In addition, the wind power generator according to the present embodiment includes three blades 110 so as to pursue stability while maximizing the characteristics of the wind, but is not limited thereto. The scope of the present invention is limited by the number of blades 110. Is not limited.

The hub 121 of the rotor 120 is a place where the plurality of blades 110 are connected.

The hub 121 may have a substantially circular shape when viewed from the front, and may have a dome shape when viewed from the side.

And, one side of the hub 121 is connected to a nacelle (nacelle, not shown) that receives the rotational movement of the blade 110 to produce electrical energy, the nacelle is protected by a nacelle cover (130, nacelle cover).

The nacelle receives the rotational motion of the blade 110 to produce electrical energy such as mechanical parts, such as a main shaft (not shown), gear box (gear box) It refers to a structure in which mechanical parts such as generators and generators are structurally coupled.

As such, the nacelle cover 130 is coupled to the outside of the nacelle serves to protect the nacelle.

Since the nacelle cover 130 is exposed to the outside air as it is constantly exposed to snow, rain or sunlight, a certain degree of rigidity should be ensured. Therefore, the nacelle cover 130 is made of a non-metal or metal composite material with excellent durability.

On the other hand, the tower 140 is an axis extending vertically, and supports the axial load on the structure, such as a plurality of blades 110, hub 121, nacelle and nacelle cover 130.

The tower 140 may be divided into a lower tower at a lower portion and an upper tower at an upper portion by position.

The tower 140 is a hollow pipe-type structure, and a cable or the like is passed through the inner empty space of the tower 140. The cable may be various kinds of cables including power cables for power transmission, cables for communication, and the like.

On the other hand, in the case of a wind turbine generator having a small size or a small size, there is no great difficulty in installing a wind turbine, but as in the present embodiment, the length of the tower 140 is about 100 meters (m) and the length of the blade 110 is also a tower. In the case of a large wind power generator having a length corresponding to 140, the operation of transferring the blade 110 adjacent to the hub 121 and inserting and fastening the blade 110 into the blade connecting portions 123, 124, and 125 of the hub 121 is performed. Not easy

Therefore, since the work takes a lot of time in installing the blade 110, there is a need for a wind turbine blade gripping device 200 that can shorten the working time.

1 to 9, the blade gripping device for a wind turbine generator 200 according to an embodiment of the present invention includes a mainframe 210 and a mainframe 210 connected to a plurality of crane cables 150. At least one of the plurality of crane cables 150 connected to the gripping unit 400 for gripping the blade 110 for the wind power generator and connected to the crane cable 150 to adjust the installation angle of the blade 110. It includes a crane cable length adjusting unit 300 for adjusting any one length.

The blade gripping device for a wind turbine generator 200 according to an embodiment of the present invention, the work to rotate the hub 121 to install a second blade 110 after installing one blade 110 in the hub. In order to omit the above, the installation angle of the blade 110 is adjusted to correspond to the positions of the blade connecting portions 123, 124, and 125 of the hub 121 into which the blade 110 is inserted.

As shown in FIG. 2, the mainframe 210 has a plurality of crane cables 150 connected to a crane connected in a longitudinal direction. That is, the plurality of crane cables 150 are connected to the longitudinal front and rear ends of the main frame 210, respectively, and transport the main frame 210 to the hub 121 side.

In addition, a root gripping unit 410 for gripping the blade root 111 is connected to the front end of the main frame 210, and a tip gripping unit 450 for gripping the blade tip 113 at the rear end thereof. ) Is connected.

In the present embodiment, the main frame 210 is formed in a "T" shape as a whole so as to maintain a balance of the main frame 210 by connecting the plurality of crane cables 150 at predetermined intervals to the front end, but is not limited thereto. Nor is the scope of the present invention limited by the shape of the mainframe 210.

1, the blade connecting portions 123, 124 and 125 into which the blade 110 is inserted are positioned at 60 degrees, 180 degrees, and 300 degrees with respect to the tower 140 of the hub 121.

Conventionally, while maintaining the blade connecting portion (123, 124, 125) and the blade 110 in a horizontal state, the blade 110 is inserted into the blade connecting portion (123, 124, 125) to be installed, but after installing the first blade 110, the hub 121 is again in a horizontal state Since it has to be rotated to have a problem that takes more time accordingly.

Therefore, in the present embodiment, the crane cable length adjusting unit 300 is provided to adjust at least one of the plurality of crane cables 150 to adjust the installation angle of the blade 110 in accordance with the position of the blade connecting portion (123, 124, 125). do.

Referring to Figure 2, the crane cable length adjustment unit 300, the main frame 210 corresponding to the blade tip portion 113 position to adjust the installation angle of the blade 110 by raising and lowering the blade tip portion 113 It is connected to the crane cable 150 connected to one end of the longitudinal direction.

That is, the crane cable length adjusting unit 300 is connected to the crane cable 150 connected to the rear end of the main frame 210.

3, the crane cable length adjusting unit 300 includes at least one drum winch 310 wound around the crane cable 150 and a crane cable 150 wound around the drum winch 310. And a drum winch driver 330 for driving the drum winch 310 to be unwound.

As shown in FIG. 3, the at least one drum winch 310 includes a first drum winch 311 and a second drum winch 313, each of which may adjust the length of the crane cable 150.

That is, the first drum winch 311 may adjust the length of the crane cable 150 by winding and unwinding the crane cable 150 connected to the crane side by the first drum winch driver 331, and the second drum winch. 313 may adjust the length of the crane cable 150 by winding and unwinding the crane cable 150 connected to the rear end of the main frame 210 by the second drum winch driver 333.

Meanwhile, in the present embodiment, the crane cable length adjusting unit 300 includes, but is not limited to, at least one drum winch 310 and a drum winch driver 330 for driving at least one drum winch 310. A single drum winch in which the drum winch 310 and the drum winch driver 330 are combined into one can be used.

10 and 11, the rear end of the main frame 210 to adjust the installation angle of the blade 110 to correspond to the blade connection portion 123, 125 located at 60 degrees and 300 degrees relative to the tower 140 Adjust the length of the crane cable 150 connected to.

That is, by winding the crane cable 150 connected to the rear end of the main frame 210 to raise the blade tip 113 relative to the blade root 111.

In addition, in the present embodiment, the gripping unit 400 serves to adjust the installation angle of the blade 110 while gripping the blade 110.

4 to 9, the gripping unit 400 is connected to one end portion in the longitudinal direction of the main frame 210 corresponding to the position of the blade root portion 111 to grip the blade root portion 111. Root gripping unit 410, and a tip gripping unit 450 that is connected to the other end of the longitudinal direction of the main frame 210 corresponding to the blade tip portion 113 position, the gripping the blade tip portion 113 .

In this embodiment, the root gripping unit 410 serves to control the posture of the blade 110 by simultaneously rotating the blade root 111 and gripping the blade root 111.

4 to 6, the root gripping unit 410 is connected to the root gripper 420 and the root gripper 420 to grip the blade root 111, and the blade 110. Root gripper rotating module 430 for rotating the root gripper 420 to rotate about the longitudinal center axis of the blade 110.

The root gripper 420 serves to grip the blade root 111 to install the blade 110 in the hub 121.

In this embodiment, the root gripper 420 is provided symmetrically to the root frame portion 421 and the root frame portion 421 into which the blade root portion 111 is inserted, but the blade root portion 111 is approached and spaced apart from each other. A plurality of root gripping portions 423 for gripping the outer surfaces of the plurality of root gripping portions 423 and blade root portions 111 of the plurality of root gripping portions 423, respectively. Root pressing pad 425 for contact pressure, and one end is connected to the root frame portion 421 and the other end is connected to the root gripping portion 423 to drive the plurality of root gripping portion 423 mutually approached and spaced apart A plurality of root gripping drivers 424 are included.

The root frame part 421 is a part connected to the front end of the main frame 210 and supports the plurality of root gripping parts 423 and the root gripping driver 424.

In the present embodiment, the root frame portion 421 is configured as a rectangular frame, but is not limited thereto, and the scope of the present invention is not limited by the shape of the root frame portion 421.

In addition, the plurality of root gripping parts 423 may grip the outer surface of the blade 110 while approaching each other, or release the outer surface of the blade 110 while being spaced apart from each other.

4 and 5, one end of the root gripping portion 423 is hinged to the upper or lower portion of the root frame portion 421.

The other end of the root gripping portion 423 is slidably coupled to the side of the root frame portion 421.

That is, when the other ends of the plurality of root gripping portions 423 are approached and spaced apart by the stretching and contracting operation of the root gripping portions 424, the slots 422 formed on the side of the root frame portion 421 are formed. Reciprocally coupled accordingly.

In addition, the plurality of root gripping portions 423 are provided symmetrically to the root frame portion 421 in the same structure.

In the present embodiment, the root gripping portion 423 is formed in a bar shape, but is not limited thereto, and the scope of the present invention is not limited by the shape of the root gripping portion 423.

In addition, a root pressing pad 425 is provided on the surface contacting the blade root portion 111 of the plurality of root gripping portions 423 to pressurize the outer surface of the blade root portion 111.

The root pressure pad 425 is made of a flexible soft material such as rubber or urethane, thereby preventing the blade root portion 111 from being damaged when the blade root portion 111 is gripped, and at the same time, the blade root portion. Deformed to correspond to the circular shape of the (111) surface can be firmly grip the blade root portion (111).

In addition, the plurality of root gripping drivers 424 allow the plurality of root gripping parts 423 to mutually approach and space apart so that the plurality of root gripping parts 423 grip the outer surface of the blade root part 111. It serves to provide power.

4 and 5, in the present embodiment, the root gripping driving unit 424 extends with one end connected to the upper or lower part of the root frame part 421 and the other end connected to the root gripping part 423. And a retracting actuator.

When the plurality of actuators are extended, the plurality of root gripping portions 423 slide to approach each other along the root frame portion 421 while pressing and gripping the blade root portions 111, and the plurality of root gripping portions 423 slides. The root gripping portion 423 slides apart from each other along the root frame portion 421 to release the gripping blade root portion 111.

On the other hand, after the blade 110 is installed on the hub 121, the root gripper 420 having gripped the blade 110 should be removed.

In the present embodiment, the root frame portion 421 is hinged 426 so that the upper frame is rotatable from both sides to the upper side, and the lower frame is separated into both ends to pivot the latch 427 hinged to one end and Pin and unpin the other end.

For example, the process of removing the root gripper 420 from the blade 110, after the pin coupling release of the latch 427 in the lower frame of the root frame portion 421, the root lifting cable length adjusting unit 433 The root lifting cable 431 is pulled to rotate the upper frame of the root frame part 421 to the top to remove the root gripper 420 that grips the blade 110.

In addition, in the present embodiment, the root gripper rotation module 430 rotates the root gripper 420, which grips the blade root portion 111, around the longitudinal center axis D of the blade 110 in the blade 110. ) To control posture. That is, the root gripper rotation module 430 serves to control the pitch angle of the blade 110.

That is, referring to Figures 4 to 6, the root gripper rotation module 430, one end is connected to the root gripper 420, the other end is connected to the main frame 210, but a plurality of root lifting cable ( 431 and a root lifting cable length adjusting unit 433 provided on the main frame 210 to adjust the length by winding and unwinding each of the plurality of root lifting cables 431 to rotate the root gripper 420. do.

Here, the root lifting cable length adjusting unit 433 includes a drive winch provided in the main frame 210, and the drive winch winds and unwinds each of the root lifting cables 431 to cover the blade root part 111 with the blade 110. ) Rotate around the longitudinal center axis (D).

Meanwhile, in the present embodiment, the tip gripping unit 450 serves to adjust the installation angle of the blades 110 by simultaneously raising and lowering the blade tip portion 113 while gripping the blade tip portion 113.

7 to 9, the tip gripping unit 450 is connected to the tip gripper 460 and the tip gripper 460 to grip the blade tip 113, but the blade tip 113. It includes a tip position adjustment module 470 for adjusting the position of the blade 110 relative to the main frame 210 by raising and lowering.

The tip gripper 460 serves to grip the blade tip 113 to install the blade 110 in the hub 121.

In the present embodiment, the tip gripper 460 is connected to the tip frame portion 461 and the tip frame portion 461 on which the blade tip portion 113 is seated, and approaches and is spaced apart from the tip frame portion 461. The tip gripping portion 462 for gripping the outer side of the tip portion 113 and the tip gripping portion 462 are supported with respect to the tip frame portion 461, but the tip gripping portion 462 is attached to the tip frame portion 461. One end portion connected to the tip gripping portion 462 and the other end rotatably connected to the tip frame portion 461, and one end portion connected to the tip frame portion 461 so as to be relatively rotatable relative to the other end portion. Is connected to the tip gripping portion 462, but the tip gripping portion 462 for driving the tip gripping portion 462 approaching and spaced apart from the tip frame portion 461, the tip frame portion 461 and the tip gripping portion ( Tip pressing pads 465 are provided on the surfaces contacting the blade tip portion 113 of the 462, the contact pressure of the outer surface of the blade tip portion 113, respectively It includes.

The tip frame portion 461 is a portion connected to the rear end of the main frame 210, and the blade tip portion 113 is seated.

In the present embodiment, the tip frame portion 461 is composed of a flat plate on which the blade 110 is seated, but is not limited thereto. The scope of the present invention is not limited by the shape of the tip frame portion 461.

In addition, the tip gripping portion 462 is installed to face the tip frame portion 461, and grips the outer surface of the blade tip portion 113 together with the tip frame portion 461 while approaching the tip frame portion 461. While the tip frame portion 461 is spaced apart from the outer surface of the blade tip portion 113 to grip off.

The support member 464 has one end connected to the tip gripping portion 462 and the other end rotatably hinged to the tip frame portion 461 such that the tip gripping portion 462 approaches the tip frame portion 461. And a tip gripping portion 462 with respect to the tip frame portion 461.

Meanwhile, in FIG. 8, the support member 464 is illustrated to be hinged to the tip frame portion 461. However, the support member 464 is not limited thereto, and the support member 464 may be any one of the tip gripping portion 462 and the tip frame portion 461. It can be rotatably hinged to one.

In addition, the tip gripping drive unit 463 serves to provide power for gripping and releasing the outer surface of the blade tip part 113 by allowing the tip gripping part 462 to approach and space the tip frame part 461. Do it.

7 and 8, in the present embodiment, the tip gripping driving unit 463 has one end hinged to the tip frame portion 461 and the other end hinged to the tip gripping portion 462 to extend and contract. It consists of an actuator. The tip gripping drive unit 463 is installed at one end opposite to the tip frame portion 461 provided with the supporting member 464.

When the actuator is retracted, the tip gripping portion 462 approaches the tip frame portion 461, and the tip gripping portion 462 and the tip frame portion 461 grip the blade tip portion 113, and the actuator is extended. In this case, the tip gripping portion 462 is spaced apart from the tip frame portion 461 so that the tip gripping portion 462 and the tip frame portion 461 release the gripping of the blade tip portion 113.

In addition, a tip pressing pad 465 is provided on the surface contacting the blade tip portion 113 of the tip frame portion 461 and the tip gripping portion 462 to pressurize the outer surface of the blade tip portion 113, respectively.

The tip pressing pad 465 is made of a flexible soft material such as rubber or urethane, thereby preventing the outer surface of the blade tip 113 from being damaged when gripping the blade tip 113 and at the same time the blade tip 113 The surface of the blade may be deformed to correspond to the curved shape of the surface to firmly grip the blade tip 113.

7 to 9, in the present embodiment, the tip position adjusting module 470 raises and lowers the tip gripper 460 that grips the blade tip 113 to install the blade 110. Serves to regulate.

In particular, as shown in FIG. 12, when the blade 110 is inserted into the blade connecting portion 124 located at 180 degrees with respect to the tower 140, the blade 110 is formed using the tip position adjusting module 470. ) Rotate it almost vertically.

Tip position control module 470, the feed cart 471 connected to be transported in the longitudinal direction of the main frame 210, and is provided on the main frame 210, the length of the main frame 210 of the feed cart 471 The guide rail 477 for guiding the direction transfer, the driving body 478 which is connected to the conveyance bogie 471 but moves along the guide rail 477, and the conveyance bogie 471, is connected to the main frame 210. And a tip gripper position adjusting unit 472 for adjusting a relative position of the tip gripper 460.

A guide rail 477 is provided at the longitudinal bottom of the main frame 210 to guide the transport of the transport cart 471, and the driving body 478 may be transported along the guide rail 477. ) Is provided.

Referring to FIGS. 7 and 9, the guide rail 477 is illustrated as a rack gear in the present embodiment. However, the guide rail 477 is not limited thereto, and any guide rail 477 may be used to guide a transport cart 471 such as an LM guide. All are available.

In addition, in the present embodiment, the driving body 478 is illustrated as a pinion gear connected to the feed cart 471, but is not limited thereto. An LM block (not shown) may be used to move along the LM guide.

As such, while the driving body 478 reciprocates along the guide rail 477, the transport cart 471 may be transported in the longitudinal direction of the main frame 210.

The tip gripper position adjusting unit 472 adjusts the relative position of the tip gripper 460 with respect to the main frame 210, that is, the blade tip 113 is raised and lowered with respect to the main frame 210 so that the blade ( 110) serves to adjust the installation angle.

The tip gripper position adjusting unit 472 is provided in the transfer cart 471, but the tip lifting cable length adjusting unit for adjusting the length of the tip lifting cable 473 connected between the transport cart 471 and the tip gripper 460 is provided. 474 and one side is connected to the tip gripper 460 and the other side is connected to the tip lifting cable 473, and one end of the tip lifting cable 473 is slid according to the vertical movement of the tip lifting cable 473, and the tip gripper is slid. And tip gripper support member 475 supporting 460.

Tip lifting cable length adjusting unit 474 is provided in the feed cart 471 includes a drive winch for winding and unwinding the tip lifting cable 473. The drive winch may adjust the length of the tip lifting cable 473.

In particular, as shown in Figure 9, the tip lifting cable connected to the tip gripper 460 to adjust the installation angle of the blade 110 to correspond to the blade connection portion 124 located 180 degrees with respect to the tower 140 ( 473) can be adjusted.

That is, the tip lifting cable 473 is unwound to maintain the blade 110 in a substantially vertical state.

In addition, the tip gripper support member 475 is formed with an arc-shaped slot 476 so that one end of the tip lifting cable 473 is slid.

Therefore, as shown in FIG. 9, when the tip lifting cable 473 is unwound and the blade tip 113 is lowered, one end of the tip lifting cable 473 is moved to the left along the slot 476. The trolley 471 is moved to the front end side of the main frame 210 to rotate the blade 110 in a substantially vertical state.

At this time, since the main frame 210 may be rotated in a direction opposite to the direction in which the blade 110 is rotated, the crane cable connected to the rear end side of the main frame 210 using the crane cable length adjusting unit 300 ( 150 may be maintained to maintain the main frame 210 in an equilibrium state.

Referring to the operation of the blade gripping device for a wind turbine 200 according to an embodiment of the present invention configured as described above are as follows.

10 to 12 is an operating state diagram showing the operation of installing the blade 110 by the blade gripping device for a wind turbine 200 according to an embodiment of the present invention.

First, the operation of inserting and installing the blade 110 in the blade connection portions 123 and 125 located at 60 degrees and 300 degrees with respect to the tower 140 will be described below.

10 and 11, in order to insert the blade 110 into the blade connecting portions 123 and 125 located at 60 degrees and 300 degrees with respect to the tower 140, the blade tip portion (aligned with the blade connecting portions 123 and 125) is installed. 113 must be raised relative to the blade root 111.

Therefore, the blade tip portion 113 is raised relative to the blade root portion 111 so as to be aligned at the blade connection portions 123 and 125 positions using the crane cable length adjusting unit 300.

This may be achieved by driving at least one drum winch 310 constituting the crane cable length adjusting unit 300 to wind the crane cable 150 connected to the rear end of the main frame 210.

Next, the operation of inserting the blade 110 into the blade connecting portion 124 located at 180 degrees with respect to the tower 140 will be described.

Referring to FIG. 12, in order to insert and install the blade 110 into the blade connecting portion 124 located at 180 degrees with respect to the tower 140, the blade tip 113 may be aligned with the blade connecting portion 124. The blade 110 should be maintained in a substantially vertical state by rotating relative to 111.

Therefore, the tip gripper 460 and the blade tip portion 113 are rotated relative to the blade root portion 111 downward so as to be aligned at the blade connecting portion 124 position using the tip position adjusting module 470.

At this time, the transport cart 471 connected to the tip lifting cable 473 is moved to the front end of the main frame 210, one end of the tip lifting cable 473 along the slot 476 of the tip gripper support member 475 As the blade moves toward the left side, the blade tip 113 is erected almost vertically.

Meanwhile, as described above, after adjusting the position of the blade 110 to be aligned with the blade connecting portions 123, 124, and 125, the blade root portion 111 is moved to the blade connecting portions 123, 124, and 125 by moving the blade 110 toward the blade connecting portions 123, 124, and 125. Insert

In this case, since the blade connection parts 123, 124, 125 and the blade root part 111 are bolted together, a plurality of bolt holes (not shown) provided in the blade root part 111 are provided in the blade connection parts 123, 124, 125. Should be inserted correctly).

Therefore, in the present embodiment, the alignment of the plurality of bolts and the bolt holes may be achieved by the root gripper rotating module 430.

That is, in order to control the pitch angle of the blade 110, by using the root lifting cable length adjusting unit 433, the blade 110 is rotated about the central axis (D) in the longitudinal direction of the blade 110 root gripper ( Rotate 420.

As described above, the wind turbine blade gripping device 200 according to the present invention can control the posture of the blade 110 to correspond to the position of the blade connecting portion 123, 124, 125 provided in the hub 121, After installing one blade 110 as described above, the operation of rotating the hub 121 can be omitted, thereby reducing the work time according to the installation of the blade 110.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. Accordingly, such modifications or variations are intended to fall within the scope of the appended claims.

110: blade 120: rotor
121: hub 123, 124, 125: blade connection
130: nacelle cover 140: tower
150: crane cable 200: blade gripping device
210: main frame 300: crane cable length control unit
310: drum winch 330: drum winch drive unit
400: gripping unit 410: root gripping unit
420: root gripper 421: root frame portion
423: root gripping portion 424: root gripping portion
425: root pressure pad 430: root gripper rotary module
431: root lifting cable 433: root lifting cable length adjustment unit
450: tip gripping unit 460: tip gripper
461: tip frame portion 462: tip gripping portion
463: tip gripping drive unit 464: support member
465: tip pressure pad 470: tip position adjustment module
471: feed cart 472: tip gripper position adjustment unit
473: tip lifting cable 474: length of the tip lifting cable
475: tip gripper support member 477: guide rail
478: drive body

Claims (21)

A mainframe connected to a plurality of crane cables;
A gripping unit connected to the main frame and gripping a blade for a wind power generator; And
Is connected to the crane cable, including a crane cable length adjusting unit for adjusting the length of at least one of the plurality of crane cables to adjust the installation angle of the blade,
The gripping unit is,
A root gripping unit connected to one end portion in the longitudinal direction of the main frame corresponding to the blade root portion and gripping the blade root portion; And
It is connected to the other end of the longitudinal direction of the main frame corresponding to the blade tip portion position, comprising a tip gripping unit for gripping the blade tip portion,
The root gripping unit,
A root gripper for gripping the blade root portion; And
And a root gripper rotating module connected to the root gripper to rotate the root gripper to rotate the blade about a longitudinal central axis of the blade. The method of claim 1,
The plurality of crane cables,
It is connected to both ends of the longitudinal direction of the main frame corresponding to the blade root and tip position, respectively
The crane cable length adjusting unit,
And a blade gripping device for a wind turbine connected to the crane cable connected to one end portion of the main frame in a longitudinal direction corresponding to the blade tip position to raise and lower the blade tip portion to adjust the installation angle of the blade. 3. The method of claim 2,
The crane cable length adjusting unit,
At least one drum winch in which the crane cable is wound; And
And a drum winch driving unit for driving the drum winch such that the crane cable is wound and unwound on the drum winch. delete delete The method of claim 1,
The root gripper,
A root frame portion into which the blade root portion is inserted;
A plurality of root gripping portions provided symmetrically to the root frame portion and gripping the outer surface of the blade root portion while being mutually approached and spaced apart from each other;
One end is connected to the root frame portion and the other end is connected to the root gripping portion, the blade gripping device for a wind turbine comprising a plurality of root gripping drive unit for driving the plurality of root gripping parts to approach and spaced apart from each other . The method according to claim 6,
Each of the plurality of root gripping portions,
One end hinged to the root frame portion, the other end is slidably coupled to the root frame portion so as to be mutually accessible and spaced apart by the expansion and contraction operation of the root gripping drive unit blade grip for wind power generators Ping device. The method according to claim 6,
The root gripper,
The blade gripping device for a wind turbine is provided on each of the surfaces in contact with the blade root portion of the plurality of root gripping portion, the pressure pad for contact pressure on the outer surface of the blade root portion. The method according to claim 6,
The root gripping drive unit,
Blade end gripping apparatus for a wind turbine, characterized in that the one end is connected to the root frame portion and the other end is connected to the plurality of root gripping portion to extend and contract. The method of claim 1,
The root gripper rotation module,
A plurality of root lifting cables, one end of which is connected to the root gripper and the other end of which is connected to the main frame, spaced apart from each other; And
Is provided on the main frame, the blade gripping device for a wind power generator comprising a root lifting cable length adjusting unit for adjusting the length by winding and unwinding each of the plurality of root lifting cables to rotate the root gripper. The method of claim 10,
The root lifting cable length adjusting unit,
The blade gripping device for a wind turbine is provided on the main frame, including a drive winch for winding and unwinding each of the plurality of root lifting cables. The method of claim 1,
The tip gripping unit,
A tip gripper for gripping the blade tip portion; And
Is connected to the tip gripper, the blade gripping device for a wind turbine comprising a tip position adjustment module for adjusting the position of the blade relative to the main frame by raising and lowering the blade tip. The method of claim 12,
The tip gripper,
A tip frame part in which the blade tip part is seated;
A tip gripping part connected to the tip frame part so as to be opposite to the tip frame part and to grip an outer surface of the blade tip part while being approached and spaced apart from the tip frame part;
One end is connected to the tip frame portion and the other end is connected to the tip gripping portion, the blade gripping device for a wind turbine including a tip gripping drive for driving the tip gripping portion approaching and spaced apart from the tip frame portion . The method of claim 13,
The tip gripper,
The tip gripping portion is supported with respect to the tip frame portion, and one end is connected to the tip gripping portion and the other end is rotatably connected to the tip frame portion such that the tip gripping portion is rotatable relative to the tip frame portion. Blade gripping device for a wind turbine further comprising a support member. The method of claim 13,
The tip gripper,
The tip gripping portion and the tip gripping portion of the blade gripping device for a wind turbine is provided on each of the surfaces in contact with the blade tip portion, further comprising a tip pressure pad for contact pressure on the outer surface of the blade tip portion. The method of claim 13,
The tip gripping drive unit,
Blade end gripping apparatus for a wind turbine, characterized in that the one end is connected to the tip frame portion and the other end is connected to the tip gripping portion to extend and contract. The method of claim 13,
The tip position control module,
A transport cart connected to be transportable in the longitudinal direction of the main frame; And
A blade gripping device for a wind turbine coupled to the transfer bogie, comprising a tip gripper position adjusting unit for adjusting a relative position of the tip gripper with respect to the main frame. 18. The method of claim 17,
The tip gripper position adjustment unit,
A tip lifting cable length adjusting unit provided in the transport cart to adjust a length of the tip lifting cable connected between the transport cart and the tip gripper; And
One side is connected to the tip gripper and the other side is connected to the tip lifting cable, one end of the tip lifting cable is slid according to the vertical movement of the tip lifting cable, and includes a tip gripper support member for supporting the tip gripper. Blade gripping device for wind turbines. 19. The method of claim 18,
The tip lifting cable length adjusting unit,
A blade gripping device for a wind power generator, which is provided on the transport cart and includes a driving winch for winding and unwinding the tip lifting cable. 19. The method of claim 18,
The tip gripper support member,
Blade tip gripping apparatus for a wind turbine, characterized in that an arc-shaped slot is formed so that one end of the tip lifting cable is sliding. 18. The method of claim 17,
The tip position control module,
A guide rail provided in the main frame and guiding a longitudinal conveyance of the main frame of the transport cart; And
Blade gripping device for a wind turbine is connected to the transfer cart, further comprising a driving body moving along the guide rail.

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