JP5717410B2 - Nacelle cover and wind power generator equipped with the same - Google Patents

Description

  The present invention relates to a nacelle cover and a wind turbine generator having the nacelle cover.

  Conventionally, a nacelle to which a rotor head of a wind power generator is attached has a cover formed of fiber reinforced resin (FRP) and divided into a plurality of divided bodies (for example, Patent Document 1). FIG. 7 shows a bottom side divided body on the bottom side among a plurality of divided bodies constituting the nacelle cover, (A) shows a top view thereof, and (B) shows a side view thereof. (C) shows a top view of the inclined portion shown in (A), and (D) shows a side view of (C). FIG. 8 shows the scaffold, the fixing base, and the cable tray shown in FIG. 7, (A) shows a side view thereof, and (B) shows a perspective view thereof.

  The inner bottom surface of the bottom side divided body 1 has a front side divided body (not shown) and a rear side divided body (not shown) in which a part in the longitudinal direction forms a nacelle cover (not shown). As shown in FIG. 7B, it has an inclined portion. Among the inclined portions, the rear inclined portion 2 is provided with a scaffold (step) 3 for workers who maintain the inside of the nacelle and a wiring cable (not shown) connected to the rotor head (not shown). A fixing base 5 for the cable tray 4 is installed. The scaffold 3 for the operator and the fixing base 5 for the cable tray 4 are respectively installed on the bottom surface inside the rear inclined portion 2 so as to be orthogonal to the longitudinal direction of the bottom side divided body 1.

  As shown in FIG. 8, the worker's scaffold 3 uses a substantially triangular member having a cross-sectional shape perpendicular to the longitudinal direction of the bottom surface of the bottom side divided body 1. A space portion between the scaffold 3 for the worker and the bottom surface inside the rear inclined portion 2 is filled with a core material such as polyvinyl chloride foam. Thus, by filling the scaffold 3 for workers with the core material, the scaffold 3 for workers is also used for reinforcing the nacelle cover.

  For the fixing base 5 for the cable tray 4, a member having a substantially quadrangular cross section perpendicular to the longitudinal direction of the bottom surface of the bottom side divided body 1 is used. A cable tray 4 is provided above the fixed base 5 so as to extend in the longitudinal direction of the bottom surface of the bottom side divided body 1.

JP 2009-2274 A

  However, the scaffold 3 for the worker and the fixing base 5 for the cable tray 4 disclosed in FIGS. 7 and 8 and Patent Document 1 are reinforced with fibers so as to be integrated with the bottom surface inside the bottom side divided body 1. Laminated (secondary laminated) processed by resin overlay is installed. Therefore, there are problems that the number of members is large, the production cost of the nacelle cover is increased, and the production process is increased.

  The present invention has been made in order to solve the above-described problems, and provides a nacelle cover capable of reducing manufacturing costs and manufacturing processes, and a wind turbine generator including the nacelle cover.

In order to solve the above problems, according to the nacelle cover of the present invention, the nacelle cover of the nacelle to which a rotor head that is arranged at the upper end of the support and is driven to rotate by wind power received by a plurality of wind turbine rotor blades is attached, at least a portion of the bottom surface, when projected so as to overlap the rotation axis of the rotor head, have a long axis that intersects at a predetermined angle, the corrugations used as the fixed seat and the worker scaffolding cable tray It is characterized by being integrally molded.

  In general, the bottom of the nacelle cover has a fixing material for installing a cable tray for laying a cable connected to the rotor head, and a scaffold for workers who move in the nacelle for maintenance, etc. (steps) And are provided. The cable tray fixing material and the worker's scaffolding are prepared separately, and they are laminated by overlay (secondary lamination) and installed inside the bottom surface of the nacelle cover. In addition, the scaffold for the operator is also used for reinforcing the bottom surface of the nacelle cover by loading a core material between the bottom surface of the nacelle cover. The nacelle cover manufactured in this way has a high manufacturing cost because it has a large number of members and requires an overlay operation.

  However, in the present invention, a corrugation (a wavy uneven shape) having a long axis intersecting at a predetermined angle is integrally formed when projected onto at least a part of the bottom surface of the nacelle cover so as to overlap the rotation axis of the rotor head. It was decided. For this reason, the corrugation provided on the bottom surface of the nacelle cover can be used as a fixed seat for the cable tray and a scaffold for an operator for nacelle maintenance. Therefore, the manufacturing cost and manufacturing process of the nacelle cover can be reduced.

  Moreover, since the corrugation integrally molded on the bottom surface of the nacelle cover is also used as the cable tray fixing seat and the worker's scaffold, the weight of the nacelle cover can be reduced.

  According to the nacelle cover of the present invention, the predetermined angle is about 90 degrees.

  When projected so as to overlap the rotation axis of the rotor head, the long axis of the corrugation intersects with the rotation axis of the rotor head so as to be approximately 90 degrees. Therefore, it is possible to further facilitate the movement of an operator who maintains the nacelle and to increase the rigidity of the bottom surface of the nacelle cover.

  According to the nacelle cover of the present invention, the long axis of the corrugation is a pair of substantially V shapes with respect to the rotation axis of the rotor head.

  When projected so as to overlap the rotation axis of the rotor head, the long axis of the corrugation is provided so as to form a pair of substantially V shapes with respect to the rotation axis of the rotor head. Therefore, when trouble occurs in the equipment provided in the nacelle and oil leaks from the equipment, the leaked oil can be collected on the rotation axis of the rotor head projected on the bottom surface. Therefore, the leaked oil can be guided to a predetermined position on the bottom surface of the nacelle cover, and oil leakage from the joint portion of the nacelle cover can be prevented.

According to the nacelle cover of the present invention, the long axis of the corrugations, characterized in that extending in the width direction of the bottom surface perpendicular to the rotation axis of the rotor head.

  When projected so as to overlap the rotation axis of the rotor head, the long axis of the corrugation is extended in the width direction of the bottom surface of the nacelle cover perpendicular to the rotation axis of the rotor head. Therefore, the rigidity of the bottom surface of the nacelle cover can be further increased. Therefore, the strength of the bottom surface of the nacelle cover can be further reinforced.

  According to the nacelle cover of the present invention, the cross section perpendicular to the major axis direction of each convex shape among the plurality of concave and convex portions constituting the corrugation is a trapezoidal shape.

  The convex cross-sectional shape forming the corrugation is perpendicular to the major axis direction, and the trapezoidal shape is adopted. Thereby, while using corrugation for an operator's scaffold, a cable tray can be stably installed on the convex upper surface of corrugation. Further, since the cable tray can be provided on the upper surface of the corrugation raised from the bottom surface of the nacelle cover, water passes between the cable tray and the bottom surface of the nacelle cover even when water enters the nacelle. Therefore, the cable can be prevented from being flooded.

  According to the nacelle cover of the present invention, at least a part of the bottom surface has an inclined portion, and the corrugation is provided in the inclined portion, and the upper surface of the trapezoidal shape, the bottom surface of the inclined portion, and the upper surface The angle between one side of the trapezoidal shape connecting the two is the same as the inclination angle of the inclined portion.

  In the corrugation provided in the inclined portion of the bottom surface of the nacelle cover, the angle of one side of the trapezoidal shape connecting the trapezoidal top surface of the cross section and the bottom surface of the inclined portion is the same as the inclination angle of the inclined portion. Therefore, one side of the trapezoidal shape can be made horizontal. Thereby, when an operator puts his / her foot on one side of the trapezoidal shape, his / her foot can be placed horizontally. Therefore, the worker can easily move in the nacelle.

  According to the wind power generator of the present invention, the nacelle cover according to any one of the above is provided.

  It was decided to use a nacelle cover that can reduce manufacturing costs and manufacturing processes. Therefore, the manufacturing cost of a wind power generator can be reduced.

  When projected onto at least a part of the bottom surface of the nacelle cover so as to overlap the rotation axis of the rotor head, corrugation (wave-like uneven shape) having a long axis intersecting at a predetermined angle is integrally formed. For this reason, the corrugation provided on the bottom surface of the nacelle cover can be used as a fixed seat for the cable tray and a scaffold for an operator for nacelle maintenance. Therefore, the manufacturing cost and manufacturing process of the nacelle cover can be reduced.

  Moreover, since the corrugation integrally molded on the bottom surface of the nacelle cover is also used as the cable tray fixing seat and the worker's scaffold, the weight of the nacelle cover can be reduced.

It is a perspective view of the nacelle cover concerning a 1st embodiment of the present invention. It is a side view of the nacelle cover shown in FIG. It is a top view of the bottom part side division which comprises the nacelle cover shown in FIG. It is a longitudinal cross-sectional view of the inclination part of the bottom part side division body shown in FIG. 4A and 4B show that a cable tray is installed on the inclined portion shown in FIG. 4. FIG. 4A is a side view thereof, and FIG. 5B is a perspective view of FIG. It is a perspective view of the nacelle cover concerning a 2nd embodiment of the present invention. It is the bottom part side division body of the conventional nacelle cover, (A) is the top view, (B) is the side view, (C) is the upper surface which shows the inclined part shown to (A) It is a figure and (D) is a side view of (C). FIG. 7 is a scaffold, a pedestal, and a cable tray shown in FIG. 7, (A) is a side view thereof, and (B) is a perspective view thereof.

[First Embodiment]
Hereinafter, a nacelle cover according to a first embodiment of the present invention and a wind turbine generator including the same will be described with reference to FIGS. 1 to 5.
FIG. 1 is a perspective view of the nacelle cover of the present embodiment as viewed from the bottom surface side. FIG. 2 is a side view of the nacelle cover shown in FIG. 1, and FIG. 3 is a top view of the bottom side divided body shown in FIG.

  The wind power generator provided with the nacelle cover described in the present embodiment performs wind power generation. In the wind turbine generator, a support erected on the foundation, a nacelle installed at the upper end of the support, a rotor head provided on the nacelle so as to be rotatable about a substantially horizontal axis, and the rotor head is covered. A head capsule, a plurality of windmill rotor blades attached radially around the rotation axis of the rotor head, and power generation equipment for generating power by rotating the rotor head are provided.

  The nacelle shown in FIG. 1 and FIG. 2 is attached to a rotor head (not shown) that is arranged at the upper end of a column (not shown) and is driven to rotate by wind force received by a plurality of wind turbine rotor blades (not shown). It is done. The nacelle houses therein a power generation facility (not shown) that generates power by rotating the rotor head, and covers the outside with a nacelle cover 1 to protect the power generation facility from the surrounding environment.

As for the nacelle cover 1, the housing | casing is roughly comprised by four division bodies, the front side division body 11, the rear side division body 21, the bottom part division body 31, and the roof side division body 41. As shown in FIG.
The front part side division body 11 is arrange | positioned on the bottom part side division body 31 mentioned later, and supports a rotor head rotatably. A speed increaser (not shown) is provided in the front side divided body 11. The front side divided body 11 is made of, for example, FRP.

  The rear side divided body 21 is attached above the bottom side divided body 31 at the rear end (right end in FIG. 1) of the front side divided body 11, and power generation equipment (not shown) is arranged inside. Like the front side divided body 11, the rear side divided body 21 is formed from FRP.

  The roof-side divided body 41 is provided above the front-side divided body 11 and the rear-side divided body 21, and the front-side divided body 11 and the rear-side divided body 21 together with the bottom-side divided body 31 in the vertical direction. I support from. The roof side divided body 41 is also made of FRP, like the front side divided body 11 and the rear side divided body 21.

  The bottom part side division body 31 is located in the bottom part side among division bodies. The bottom side divided body 31 has a front end (left side in FIG. 1) disposed between the support column and the front side divided body 11, and a rear end disposed below the rear side divided body 21. And a rotor head or the like are turned around a vertical axis. The bottom-side divided body 31 is provided with a turning drive unit (not shown) that drives the nacelle, the rotor head, and the like to turn. The bottom side divided body 31 is made of, for example, FRP.

As shown in FIG. 3, the bottom side divided body 31 is composed of three parts: a front side bottom part 33, an inclined part 34, and a rear side bottom part 35 whose longitudinal direction is the oil pan. .
The front side bottom surface portion 33 is a bottom surface 32 in the vicinity of the front side divided body 11 (see FIG. 1), and is disposed between the support column and the bottom side divided body 31 to form a nacelle (see FIG. 1), a rotor head, or the like. Is provided with a hole 36 through which a cylindrical body (not shown) that pivots around a vertical axis passes.

  The inclined portion 34 is a bottom surface 32 connecting the front side bottom surface portion 33 and the rear side bottom surface portion 35. The rear side divided body 21 is disposed above the inclined portion 34 and the rear side bottom surface portion 35. The inclined portion 34 is inclined upward at an inclination angle θ from the front side bottom surface portion 33 toward the rear side bottom surface portion 35. The inclined portion 34 is provided with a corrugation 37.

FIG. 4 shows a longitudinal sectional view of the inclined portion of the bottom side divided body.
Corrugation having a long axis that intersects with a predetermined angle when projected onto the inclined portion (at least part) 34 of the bottom surface 32 of the bottom-side divided body 31 (see FIG. 3) so as to overlap the rotation axis of the rotor head. 37 is integrally molded.

  The corrugation 37 provided in the inclined portion 34 has a plurality of wavy uneven shapes. The major axis of each irregularity of the corrugation 37 intersects with the rotation axis of the rotor head so as to form an angle of about 90 degrees (predetermined angle) when projected so as to overlap the rotation axis of the rotor head.

The long axis of the corrugations 37, have been extended in the width direction of the bottom surface 32 of the bottom side divided body 31 perpendicular to the rotation axis of the rotor head, are the width and substantially equal length of the bottom surface 32. The uneven shape of the corrugation 37 is provided on the inclined portion 34 at a pitch that is substantially equal to the stride of an operator (not shown) who maintains the nacelle (see FIG. 1).

  Of the plurality of projections and depressions constituting the corrugation 37, the cross section perpendicular to the major axis direction of each projection 38 is trapezoidal as shown in FIG. Each convex shape 38 has a trapezoidal cross section with an upper surface 38a parallel to the inner bottom surface 32 of the inclined portion 34 of the bottom side divided body 31 and an inclination from the bottom surface 32 of the inclined portion 34 toward the upper surface 38a. It is formed by the rising inclined side 38b.

  In the corrugation 37, the angle between the trapezoidal upper surface 38 a of each convex shape 38 and the trapezoidal inclined side (one side) 38 b connecting the bottom surface 32 and the upper surface 38 a of the inclined portion 34 is the inclined portion 34. It is formed so that it may become the same as this inclination angle (theta).

  Thus, by setting the angle of the inclined side 38b of the convex shape 38 of the corrugation 37 to the same angle as the inclination angle θ of the inclined portion 34, the upper inclined side 38b of the inclined side 38b of the convex shape 38 of the corrugation 37 is horizontal. become. Therefore, when an operator puts a foot (not shown) on the upper inclined side 38b, the foot can be horizontally placed on the inclined side 38b.

FIG. 5 shows that a cable tray is installed on the inclined portion shown in FIG. 4, (A) shows a side view thereof, and (B) shows a perspective view of (A). is there.
A cable tray 39 for laying a wiring cable (not shown) connected to the rotor head is mounted on each upper surface 38 a of the corrugation 37 provided in the inclined portion 34. The cable tray 39 is provided so as to extend in the longitudinal direction of the bottom side divided body 31 (see FIG. 3), and is fixed to each upper surface 38 a of the corrugation 37 by pop rivets or the like.

  As shown in FIG. 3, the inclined portion 34 is provided with a hatch 40 at a part thereof. The hatch 40 is provided for an operator performing maintenance to enter and exit the nacelle. The area around the hatch 40 is formed so as to rise from the bottom surface 32 inside the inclined portion 34. In this way, by forming from the bottom surface 32 on the inner side of the inclined portion 34, water can be prevented from entering the inside of the hatch 40 and the strength of the bottom surface 32 of the bottom side divided body 31 around the hatch 40 can be improved.

As described above, according to the nacelle cover 1 according to the present embodiment and the wind turbine generator provided with the same, the following effects can be obtained.
When projected onto the inclined portion (at least part) 34 of the bottom surface 32 of the bottom-side divided body 31 constituting the nacelle cover 1 so as to overlap the rotation axis of the rotor head (not shown), approximately 90 degrees (predetermined) The corrugation 37 having long axes intersecting with each other at an angle) is integrally formed. Therefore, the corrugation 37 provided on the bottom surface 32 of the bottom-side divided body 31 of the nacelle cover 1 can be used as a fixed seat for the cable tray 39 and a scaffold for workers for maintenance of the nacelle. Therefore, the manufacturing cost and manufacturing process of the nacelle cover 1 can be reduced.

  In addition, since the corrugation 37 integrally formed on the bottom surface 32 of the bottom-side divided body 31 of the nacelle cover 1 is also used as a fixed seat for the cable tray 39 and a scaffold for workers, the weight of the nacelle cover 1 can be reduced. it can.

  When projected so as to overlap the rotation axis of the rotor head, the long axis of the corrugation 37 intersects the rotation axis of the rotor head at about 90 degrees. Therefore, it is possible to further facilitate the movement of an operator who maintains the nacelle, and to increase the rigidity of the bottom surface 32 of the bottom side divided body 31 of the nacelle cover 1.

  When projected so as to overlap the rotation axis of the rotor head, the long axis of the corrugation 37 is extended in the width direction of the bottom surface 32 of the bottom-side divided body 31 of the nacelle cover 1 perpendicular to the rotation axis of the rotor head. . Therefore, the rigidity of the bottom surface 32 of the nacelle cover 1 can be further increased. Therefore, the strength of the bottom surface 32 of the nacelle cover 1 can be further reinforced.

  The cross-sectional shape perpendicular to the major axis direction of the convex shape 38 forming the corrugation 37 is a trapezoidal shape. Thereby, while using the corrugation 37 for a worker's scaffold, the cable tray 39 can be stably installed in the upper surface 38a of the convex shape 38 of the corrugation 37.

  In addition, since the cable tray 39 can be provided on the upper surface 38a of the corrugation 37 raised from the bottom surface 32 of the bottom-side divided body 31 of the nacelle cover 1, even when water enters the nacelle, Water passes between the inside of the bottom surface 32 of the bottom-side divided body 31 and the cave tray 39. Therefore, it is possible to prevent the wiring cable (not shown) from being flooded.

  The corrugation 37 provided on the inclined portion 34 of the bottom surface 32 of the bottom-side divided body 31 of the nacelle cover 1 is a trapezoidal shape that connects the trapezoidal top surface 38 a of the cross-sectional shape and the bottom surface 32 of the inclined portion 34. The angle with the inclined side (one side) 38b is the same as the inclined angle θ of the inclined portion 34. Therefore, a part of the inclined side 38b can be made horizontal. Thereby, when an operator (not shown) puts a foot (not shown) on the inclined side 38b, the foot can be placed horizontally. Therefore, the worker can easily move in the nacelle.

  The nacelle cover 1 capable of reducing the manufacturing cost was used. Therefore, the manufacturing cost of a wind power generator can be reduced.

  In the present embodiment, the corrugation 37 is described as being integrally formed with the inclined portion 34, but the present invention is not limited to this, and the bottom surface of the front side bottom surface portion 33 and the rear side bottom surface portion 35, or Alternatively, it may be provided on the entire bottom surface 32 of the bottom side divided body 31.

[Second Embodiment]
This embodiment is basically the same as the first embodiment, but the first embodiment differs from the first embodiment in that the major axis of the corrugation is the rotation axis of the rotor head when projected so as to overlap the rotation axis of the rotor head. It differs in that it intersects the object so as to form a pair of substantially V-shapes. Therefore, in this embodiment, this different part is demonstrated and about the other overlapping component, the same code | symbol is attached | subjected and the overlapping description is abbreviate | omitted.

FIG. 6 is a perspective view of the nacelle cover according to the second embodiment of the present invention.
When projected onto the inclined portion (at least part) 34 of the bottom surface (not shown) of the bottom side divided body 31 of the nacelle cover 1 so as to overlap the rotation axis of the rotor head (not shown), A corrugation (wave-like concavo-convex shape) 50 having a long axis that forms a pair of substantially V shapes (intersecting at a predetermined angle) with respect to the rotation axis is integrally formed.

  By providing the corrugation 50 in this way, when oil leaks from the equipment constituting the power generation facility (not shown) covered with the nacelle cover 1, the leaked oil is corrugated in a substantially V shape. 50, the inclined portion 34 on the bottom surface of the bottom-side divided body 31 can be gathered on the rotation axis of the rotor head projected onto the inclined portion 34 (substantially the central portion in the width direction of the inclined portion 34). .

  The leaked oil collected on the rotation axis of the rotor head projected onto the inclined portion 34 along the major axis of the corrugation 50 is the bottom surface on the front side that is an oil pan from the rotation axis of the rotor head projected onto the inclined portion 34. Guided to part 33. Thus, a power generation facility is configured from a bolt joint portion (not shown) that fixes the front side bottom surface portion 33 to the front side divided body (not shown) or the rear side divided body (not shown). It is possible to prevent the leaked oil from the leaking equipment from leaking, and to easily flow the collected leaked oil to a predetermined position on the front side bottom surface portion 33.

As described above, according to the nacelle cover 1 according to the present embodiment and the wind turbine generator provided with the same, the following effects can be obtained.
When projected so as to overlap the rotation axis of the rotor head (not shown), the long axis of the corrugation 50 is provided so as to form a pair of substantially V-shapes with respect to the rotation axis of the rotor head. Therefore, when trouble occurs in a device for a power generation facility (not shown) provided in the nacelle (not shown) and oil leaks from the device, the bottom surface of the bottom-side divided body 31 of the nacelle cover 1 (see FIG. It is possible to collect leaked oil on the rotation axis of the rotor head projected onto the inclined portion 34 of (not shown). Therefore, the leaked oil can be easily guided to a predetermined position on the front side bottom surface portion 33 of the nacelle cover 1 from the rotation axis of the rotor head projected on the inclined portion 34, and the bolt joint portion (joint portion) of the nacelle cover 1 can be obtained. ) Can be prevented from leaking oil.

1 Nacelle cover 32 Bottom 37 Corrugation

Claims (7)

A nacelle cover of a nacelle, to which a rotor head that is arranged at the upper end of a support and is driven to rotate by wind power received by a plurality of windmill rotor blades is attached
At least a portion of the bottom surface, when projected so as to overlap the rotation axis of the rotor head, have a long axis that intersects at a predetermined angle, the corrugations used as the fixed seat and the worker scaffolding cable tray Nacelle cover characterized by being molded integrally.   The nacelle cover according to claim 1, wherein the predetermined angle is about 90 degrees.   2. The nacelle cover according to claim 1, wherein a long axis of the corrugation is a pair of substantially V shapes with respect to a rotation axis of the rotor head. The long axis of the corrugation, nacelle cover according to any one of claims 1 to 3, characterized in that extending in the width direction of the bottom surface perpendicular to the rotation axis of the rotor head.   The nacelle cover according to any one of claims 1 to 4, wherein a cross section perpendicular to the major axis direction of each convex shape among the plurality of concaves and convexes constituting the corrugation is a trapezoidal shape. At least a part of the bottom surface has an inclined portion,
The corrugation is provided in the inclined portion,
The angle between the upper surface of the trapezoidal shape and one side of the trapezoidal shape connecting the bottom surface of the inclined portion and the upper surface is the same as the inclination angle of the inclined portion. The nacelle cover according to any one of claims 1 to 5.   A wind power generator comprising the nacelle cover according to any one of claims 1 to 6.

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