KR101557493B1 - Buffing system in manufacturing a blade of a wind power generator - Google Patents

Abstract

In a buffing system including a bed portion in which a blade for a wind turbine is located, and a buffing module for buffing the surface of the blade, the buffing module includes a driving portion, a buffing unit, and a plurality of buffing head units. The driving unit generates a rotational force. The buffing unit receives the rotational force from the driving unit and rotates. The buffing head units are connected to a lower portion of the buffing unit, and each independently rotates to buff the surface of the blade.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a blade buffing system for a wind turbine,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a buumping system, and more particularly, to a buiding system applied to a buiding process of a blade used in a wind power generator.

Recently, a number of power generation systems using alternative energy such as tidal power, wind power, and solar power have been installed, and research and development related thereto have been made. Particularly, in the case of wind power generation system, much research and development are proceeding because the manufacturing of the large blade used is time-consuming and costly and there are many technical problems to be solved.

1A to 1E, a glass fiber composite material (GFRP) layer is formed on a base portion 1 as shown in FIG. 1A, and a glass fiber composite material A resin layer is formed on the GFRP layer and the base portion 1 is removed as shown in FIG. 1C, and the upper and lower portions are joined to each other to form the blade 4, The coating layer 6 is formed on the surface of the resin layer 3 of the blade 4 to buff the surface of the final blade 7 ).

In this case, a process of buffing the surface of the blade 4 is performed to remove the joint 5 of the blade 4 or to form a coating layer 6 on the blade 4, Conventionally, it has been common practice to carry out by hand.

However, when the buffing process is performed manually, time and cost are increased, resulting in a decrease in productivity and a problem of exposing a person to a poor working environment such as dust and noise.

In recent years, development of an apparatus for automatically performing the above-mentioned buffing process has been progressed. However, there are many difficulties in automation due to the various surfaces of the blades having various curvatures.

Accordingly, it is an object of the present invention to provide an automatic buffing system capable of improving productivity and improving working environment through an automation system.

According to an embodiment of the present invention for realizing the object of the present invention described above, a bufling system includes a bed portion where a blade for a wind power generator is located, and a buffing module for buffing the surface of the blade. The buffing module includes a driving unit, a buffing unit, and a plurality of buffing head units. The driving unit generates a rotational force. The buffing unit receives the rotational force from the driving unit and rotates. The buffing head units are connected to a lower portion of the buffing unit, and each independently rotates to buff the surface of the blade.

In one embodiment, the buffing module may include: a drive transmission unit that connects the driving unit and the buffing unit, and transmits rotational force of the driving unit to the buffing unit; and a driving unit that connects the buffing unit and the buffing head units to each other, And a connection unit for distributing the rotational force of the buffing unit to each of the buffing head units.

In one embodiment, the buffing unit includes a central shaft connected to the drive transmission portion and capable of rotating relative to the drive transmission shaft of the drive transmission portion, and a side surface of the buffing unit, And a body portion that absorbs shocks depending on the curvature of the surface.

In one embodiment, the body portion may include a bellows tube and may be capable of being compressed or tensioned in the direction of extension of the central axis.

In one embodiment, the central axis may comprise a universal joint.

In one embodiment, the connecting portion includes: a first power transmission portion connecting the center shaft and the rotary shaft of one of the buffing head units to each other; and a second power transmission portion connecting one of the rotation shafts of the first and second buffing head units, And a second power transmission unit connecting the first power transmission unit and the second power transmission unit.

In one embodiment, each of the buffing head units may include a cushion portion for absorbing shocks depending on a curvature of the blade surface, and a pad portion attached to a lower surface of the cushion portion to directly process the blade surface.

In one embodiment, the buffing system includes a first elongated frame extending in a first direction (X) on the bed portion, a second elongated frame sliding in the first direction on the first elongate frame, A third elongated frame secured to the frame and extending in a second direction (Y) perpendicular to the first direction, and a third elongated frame sliding in the second direction on the third elongated frame, And a fourth extension frame extending in a third direction (Z) perpendicular to the first direction and having the buffing module fixed at an end thereof.

According to the embodiments of the present invention, since the buffing module that buffers the surface of the blade includes the buffing unit that rotates as a whole and the plurality of buffing head units that rotate independently of each other, the uniformity of the blade surface Buffing is possible, and in particular, the surface of a blade having a predetermined curvature is buffed while rotating, so that the buffing head units can be uniformly worn and durability can be improved.

In addition, since the buffing head units can be rotated by receiving the rotational force for rotationally driving the buffing unit, the driving can be performed by one driving unit, thereby making it possible to manufacture a relatively simple structure.

Further, the buffing unit includes a shock absorbable body portion, and includes a center shaft that is relatively rotatable, so that the buffing unit can move along the curvature of the blade surface. That is, it is possible to absorb shock when moving according to the curvature of the blade surface.

Further, each of the buffing head units may include a cushion portion, move smoothly along the curvature of the blade surface, and absorb shock due to movement.

Therefore, the surface of the blade having a predetermined curvature can be uniformly buffed, and the automatic buffing process can be performed, thereby improving the productivity and improving the work environment.

FIGS. 1A to 1E are process drawings showing a conventional blade manufacturing process for a wind power generator.
FIG. 2 is a perspective view illustrating a buffing system for performing a buffing process during a blade manufacturing process according to an embodiment of the present invention. Referring to FIG.
Fig. 3A is a perspective view showing a buffing module of the buffing system of Fig. 2, and Fig. 3B is a perspective view showing the inside of the buffing unit in the buffing module of Fig. 3A.
FIG. 4 is a front view showing the operation of the buffing module of FIG. 3a, and FIG. 5 is a bottom view illustrating the operation of the buffing module of FIG.

While the present invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not limited to the disclosed embodiments. It is to be understood, however, that the invention is not intended to be limited to the particular forms disclosed, but on the contrary, is intended to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. Like reference numerals are used for like elements in describing each drawing. The terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms.

The terms are used only for the purpose of distinguishing one component from another. The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise.

In the present application, the term "comprises" or "comprising ", etc. is intended to specify that there is a stated feature, figure, step, operation, component, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, parts, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as either ideal or overly formal in the sense of the present application Do not.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 2 is a perspective view illustrating a buffing system for performing a buffing process during a blade manufacturing process according to an embodiment of the present invention. Referring to FIG.

Referring to FIG. 2, a buffing system 10 according to the present embodiment includes a bed portion 11, first to fourth extension frames 12, 13, 14, 15 and a buffering module 100.

On the other hand, buffing of the blades for wind power generation means a process of uniformly processing the surface of the blades before the coating process using the insulating paint or the like is performed on the surface of the blades formed of glass fiber composite material (GFRP) or the like . Accordingly, in the coating process, the insulating paint or the like can be uniformly coated on the surface of the blade.

Wherein the first extension frame (12) extends in a first direction (X) on the bed part (11) and the second and fourth extension frames (13,15) extend in a third direction And the third extension frame 14 extends in a second direction Y which is both perpendicular to the first and second directions.

Meanwhile, the buffing module 100 is mounted on an end of the fourth extension frame 15.

Wherein the second extension frame (13) is slidable and movable in the first direction (X) on the first extension frame (12) and the fourth extension frame (15) And the buffing module 100 is slidable and movable in the third direction Z on the fourth extension frame 15. The buffing module 100 is slidable in the second direction Y on the fourth extension frame 15,

Thus, the buffing module 100 can be located at any position of the blade located on the bed portion 11, and can perform the buffing process along the surface of the blade.

Fig. 3A is a perspective view showing a buffing module of the buffing system of Fig. 2, and Fig. 3B is a perspective view showing the inside of the buffing unit in the buffing module of Fig. 3A. FIG. 4 is a front view showing the operation of the buffing module of FIG. 3a, and FIG. 5 is a bottom view illustrating the operation of the buffing module of FIG.

3A to 5, the buffing module 100 includes a driving unit 110, a driving transfer unit 120, a buffing unit 130, a connecting unit 140, and a buffing head unit 150.

The driving unit 110 includes a driving unit 111, a driving shaft 112, a fixed shaft 113, and a driving gear 114 to generate a rotational force.

The driving unit 111 may be a motor for generating a rotational force, for example, and is fixed to an end of the fourth extension frame 15. The rotational force generated in the driving generating portion 111 is transmitted to the driving transmitting portion 120 through the driving shaft 112. The fixed shaft 113 extends from the lower surface of the driving generating portion 111 to fix the driving gear 114. The driving gear 114 is fixed to one end of the fixed shaft 113 and connected to the driving transmission unit 123 and the main gear 124 of the driving transmission unit 120 to be described later, 111) to the main gear (124).

The drive transmission unit 120 includes a drive transmission shaft 121, a coupling 122, a drive transmission unit 123 and a main gear 124. The drive transmission unit 120 rotates the drive generation unit 111, And transfers it to the buffing unit 130.

Specifically, the drive transmission shaft 121 is connected to the drive shaft 112 through the coupling 122, and receives the rotational force of the drive shaft 112. The transmitted rotational force is transmitted to the driving gear 114 through the driving transmission unit 123 connected to the driving transmission shaft 121. The main gear 124 meshes with the driving gear 114, .

Since the radius of the main gear 124 is greater than the radius of the driving gear 114 when the main gear 124 is engaged with the driving gear 114 to receive the rotational force, Can be rotated at a relatively large torque and a low rotation speed.

In this case, the drive transmission unit 123 may be a belt, and a pulley may be formed on the body of the drive transmission shaft 121 and the body of the drive gear 114 to be connected to each other.

The buffing unit 130 is connected to a lower portion of the drive transmission unit 120 and includes an upper surface portion 131, a lower surface portion 132, a central axis 133, and a body portion 134.

The upper surface portion 131 of the buffing unit 130 may correspond to the lower surface of the main gear 124. Alternatively, the upper surface portion 131 may be formed on a lower surface of the main gear 124, plate shape. In this case, the upper surface 131 of the buffing unit 130 rotates at the same time as the main gear 124 rotates.

The upper and lower surfaces 131 and 132 are disposed on the opposite side of the upper surface portion 131 to face the upper surface portion 131, Are fixed to each other by a body portion (134).

The buffing unit 130 rotates about the central axis 133 by a rotational force transmitted through the drive transmission unit 120. [

In this case, the center shaft 133 is connected to the drive transmission shaft 121 and extends along the center of the main gear 124, the upper surface portion 131, and the lower surface portion 132. The center shaft 133 includes a universal joint, and is rotatable relative to the drive transmission shaft 121.

When the center shaft 133 rotates with respect to the direction of extension of the drive transmission shaft 121 and is bent in an arbitrary direction, the buffing unit 130 also rotates along the direction in which the center shaft 133 is bent .

In this case, even if the buffing unit 130 rotates along the direction in which the center shaft 133 is bent, the main gear 124 and the main gear 124 are attached to the lower surface of the main gear 124 The upper surface portion 131 is not rotated but is positioned perpendicular to the extending direction of the drive transmission shaft 121. Therefore, the impact may be applied to the buffing unit 130 except for the upper surface portion 131 and the upper surface portion 131 according to the relative positional change. In this embodiment, the body portion of the buffing unit 130 134 are designed to absorb the impact.

In this case, if the bottom portion 132 of the buffing unit 130 rotates so as to coincide with the curvature change of the surface of the blade, there is no impact of the buffing unit 130, The buffing unit 130 may be subjected to a predetermined impact because it is difficult to rotate the buffer unit 130 to coincide with the change in the curvature of the surface of the buffing unit 130. [

That is, the body portion 134 may include a bellows tube, and may be compressed or stretched along the extending direction of the central shaft 133. Thus, even if the buffing unit 130 rotates relative to the upper surface portion 131 and the drive transmission portion 120 to move along the surface of the blade, So that the structural safety can be maintained.

In addition, even if the buffing unit 130 rotates according to the direction of the central axis 133, the body 134 is partially compressed and the other part is stretched, It can absorb shock.

When the body portion 134 can be compressed or tensioned to enable the relative rotation or movement of the buffing unit 130 to perform the buffing process of the surface of the blade through the buffing module 100 , The lower surface portion 132 of the buffing unit 130 can move along the curved surface shape of the blade surface even when the blade surface has a smooth curved surface shape having a predetermined curvature.

Thus, the blade surface can be uniformly buffered while maintaining the original curved shape.

The connection unit 140 connects the buffing unit 130 and the buffing head units 150 and transmits the rotational force of the buffing unit 130 to the buffing head units 150. As a result, The head units 150 are each rotated to buff the surface of the blade.

The connection portion 140 includes a first power transmission portion 141, a first rotation shaft 142, a first rotation transmission portion 143, a second power transmission portion 144, a second rotation transmission portion 145, And includes a second rotary shaft 146.

The first power transmission unit 141 connects the first rotation shaft 142 which is the rotation axis of either the center shaft 133 and the buffing head units 150 to each other, To the first rotation shaft (142).

In this case, the first power transmission portion 141 can connect the center shaft 133 and the first rotation shaft 142 to each other by belt-pulley engagement, and the first power transmission portion 141 can connect the center And may be connected to the end of the shaft 133.

The first rotation transmitting portion 143 is coupled to the first rotating shaft 142 which is the rotating shaft of any one of the buffing head units 150 and rotates in accordance with the rotation of the first rotating shaft 142.

The second power transmission unit 144 includes the first rotation transmitting unit 143 and the second rotation transmitting unit 143 coupled to the second rotating shaft 146, which is the rotating shaft of the rest of the buffing head units 150, (145) are connected to each other.

Thus, the rotational force generated by the rotation of the first rotating shaft 142 is transmitted to the remaining buffing head units 150 through the second power transmitting unit 144, so that the remaining buffing head sets 150 are rotated .

In this case, the second power transmitting portion 144 may also connect the first rotation transmitting portion 143 and the second rotation transmitting portion 145 to each other by a belt-pulley coupling.

For example, if there are two buffing head units 150, the second rotation shaft 146 and the second rotation transmission part 145 are connected to the other one buffing head unit. However, if the number of the buffing head units 150 is three or more, the second rotation shaft 146 and the second rotation transmission part 145 are connected to the rotation shafts and the rotation shafts connected to the remaining plurality of buffing head units, respectively. Collectively.

3B, the rotational force of the center shaft 133 is transmitted to only one of the plurality of buffing head units via the first power transmitting portion 141, The units receive rotational force from the first power transmission unit 141 through the second power transmission unit 144 from one buffing head unit directly connected to the first power transmission unit 141 without receiving the rotational force directly from the center shaft 133. [

Thus, as the buffing unit 130 rotates, the rotational force of the buffing unit 130 is distributed to the plurality of buffing head units 150, so that each of the buffing head units 150 rotates independently . In this case, the plurality of buffing head units 150 are rotated independently of each other, but are rotated at the same rotation speed because they are constrained to each other through the second power transmission unit 144.

Since the first and second rotation shafts 142 and 146 which are rotation shafts of the buffing head units 150 extend parallel to the center shaft 133, 121, the first and second rotation shafts 142, 146 rotate about the drive transmission shaft 121 as well.

Each of the buffing head units 150 includes a cushion portion 151 and a pad portion 152. As described above, since the buffing unit 130 can be rotated at various angles by the relative rotation of the center shaft 133, the buffing head units 150 can also be rotated at various angles. In this case, the extending direction of the lower portion 132 of the buffing unit 130 and the cushion portion 151 and the pad portion 152 of the buffing head units 150 are parallel to each other.

Even if the buffing unit 130 includes the body portion 134 capable of shock absorption, a buffer member for absorbing an additional minute impact is required. Thus, each of the buffing head units 150 And absorbs the minute impact including the cushion portion 151.

Thus, the buffing head units 150 can naturally move along the curved shape (curved shape) of the blade surface, improve the structural safety of the buffing module 100, and perform uniform buffing of the blade surface can do.

The pad portion 152 is attached to the lower surface of the cushion portion 151 to directly buff the blade surface. In this case, the pad unit 152 may be a grinder for grinding the surface of the blade, a grinding paper, a grinding stone, a sand paper, a sand stone, And may be attached so as to be replaceable with wear.

According to the embodiments of the present invention as described above, since the buffing module that buffers the surface of the blade includes the buffing unit that rotates as a whole and the plurality of buffing head units that rotate independently of each other, It is possible to uniformly abrade the buffing head units by rotating the surface of the blade having a predetermined curvature, so that the durability can be improved.

In addition, since the buffing head units can be rotated by receiving the rotational force for rotationally driving the buffing unit, the driving can be performed by one driving unit, thereby making it possible to manufacture a relatively simple structure.

Further, the buffing unit includes a shock absorbable body portion, and includes a center shaft that is relatively rotatable, so that the buffing unit can move along the curvature of the blade surface. That is, it is possible to absorb shock when moving according to the curvature of the blade surface.

Further, each of the buffing head units may include a cushion portion, move smoothly along the curvature of the blade surface, and absorb shock due to movement.

Therefore, the surface of the blade having a predetermined curvature can be uniformly buffed, and the automatic buffing process can be performed, thereby improving the productivity and improving the work environment.

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 present invention as defined by the following claims. It can be understood that it is possible.

The buffing system according to the present invention has industrial applicability that can be used for making blades for wind power generation.

10: BUFFING SYSTEM 100: BUFFING MODULE
110: driving part 120:
130: Buffing unit 140:
150: Buffing head unit

Claims (8)

In a buffing system including a bed portion in which a blade for a wind power generator is located, and a buffing module for buffing the surface of the blade,
The buffing module comprises:
A driving unit for generating a rotational force;
A buffing unit that receives the rotation force from the driving unit and rotates;
A plurality of buffing head units connected to a lower portion of the buffing unit, each of the buffing head units independently rotating and buffing a surface of the blade; And
And a drive transmitting unit connecting the driving unit and the buffing unit and transmitting the rotational force of the driving unit to the buffing unit,
The buffing unit includes:
A center shaft connected to the drive transmission unit and capable of rotating relative to a drive transmission shaft of the drive transmission unit; And
And a body portion that forms a side surface of the buffing unit and absorbs shock due to rotation of the center shaft and curvature of the blade surface. 2. The apparatus of claim 1,
Further comprising a connection unit connecting the buffing unit and the buffing head units to each other and distributing rotational force of the buffing unit to each of the buffing head units. delete The bucking system according to claim 1, wherein the body portion includes a bellows tube, and is capable of being compressed or tensioned in the direction of extension of the central axis. 2. The buumping system according to claim 1, wherein the central axis comprises a universal joint. The connector according to claim 2,
A first power transmission unit connecting the central axis and the rotation axis of one of the buffing head units to each other; And
And a second power transmission part connecting the rotation axes of any of the buffing head units to the rotation axes of the remaining buffing heads. 3. The apparatus of claim 2, wherein each of the buffing head units comprises:
A cushion portion for absorbing an impact according to the curvature of the surface of the blade; And
And a pad portion attached to a lower surface of the cushion portion to directly process the surface of the blade. The method according to claim 1,
A first elongated frame extending in a first direction (X) on the bed portion;
A second extension frame slidable in the first direction on the first extension frame;
A third extension frame secured to the second extension frame and extending in a second direction (Y) perpendicular to the first direction; And
A fourth extension frame slidable in the second direction on the third extension frame and extending in a third direction Z which is simultaneously perpendicular to the first and second directions and to which the buffing module is fixed, Included buffing system.

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