Structure for nacelle cover connection portion of wind turbine generator

Patent metadata

Field	Value
Publication number	US-9677543-B2
Application number	US-201113881564-A
Country	US
Kind code	B2
Filing date	Nov 1, 2011
Priority date	Nov 1, 2010
Publication date	Jun 13, 2017
Grant date	Jun 13, 2017

Abstract

A structure for a nacelle cover connection portion of a wind turbine generator includes a lengthy first angled member fixed to an inside surface of a nacelle cover and forming an upper end portion of a side wall panel; and a lengthy second angled member fixed to the inside surface and forming a lower end portion of a roof panel. An upper surface of the first angled member and a lower surface of the second angled member are aligned with and fixed to each other. A covering portion covering the upper end portion from the outside of a nacelle is provided at a predetermined interval from the same and integral with the lower end portion so as to protrude to the outside of the nacelle cover farther than the lower end portion. A packing is interposed between the upper and lower surfaces.

First claim

The invention claimed is:

1. A structure for a nacelle cover connection portion of a wind turbine generator, wherein a lower panel constituting a lower part of each side wall of a nacelle cover covering a nacelle of a wind turbine generator and an upper panel constituting an upper part of said side wall are connected to each other, the structure comprising:
a first frame member fixed to an inside surface of said nacelle cover and forming an upper end portion of said lower panel;
a second frame member fixed to an inside surface of said nacelle cover and forming a lower end portion of said upper panel, the upper surface of said first frame member and the lower surface of said second frame member being aligned with and fixed to each other so as to connect the upper end portion of said lower panel and the lower end portion of said upper panel in substantially the same plane;
a covering portion covering the upper end portion of said lower panel which forms an outer wall of the nacelle cover from the outside of the nacelle at a predetermined interval in an outward direction of the nacelle cover from the upper end portion of said lower panel, the covering portion being formed integrally with the lower end portion of said upper panel so as to protrude to the outside of said nacelle cover farther than the lower end portion of said upper panel; and
a packing interposed between an upper surface of said first frame member and a lower surface of said second frame member; and
a plurality of bolts fastening said first frame member to the upper end portion of said lower panel,
wherein heads of said bolts are arranged in a space formed between the upper end portion of said lower panel and said covering portion,
a thickness of the covering portion and the lower end portion are the same, and
a thickness of the upper end portion and the lower panel are the same.

2. The structure for a nacelle cover connection portion of a wind turbine generator according to claim 1 , wherein
said first frame member is fixed to said lower panel with the upper surface of said first frame member being located above the upper end of the upper end portion of said lower panel, and
said second frame member is fixed to said upper panel with the lower surface of said second frame member being located below the lower end of the lower end portion of said upper panel.

3. The structure for a nacelle cover connection portion of a wind turbine generator according to claim 2 , wherein
a step shape formed by the upper surface of said first frame member and the upper end of the upper end portion of said lower panel is sealed by a sealing material; and
a step shape formed by the lower surface of said second frame member and the lower end of the lower end portion of said upper panel is sealed by a sealing material.

4. The structure for a nacelle cover connection portion of a wind turbine generator according to claim 1 , wherein
a length of said first frame member protruding to the inside of the nacelle is set longer than a length of said second frame member protruding to the inside of the nacelle, and a step shape formed inside the nacelle by a protruding end edge of said first frame member and a protruding end edge of said second frame member are sealed by a sealing material.

5. The structure for a nacelle cover connection portion of a wind turbine generator according to claim 1 , wherein
said first frame member is fastened to the upper end portion of said lower panel and said second frame member is fastened to the lower end portion of said upper panel by bolts through polytetrafluoroethylene washers, respectively.

6. The structure for a nacelle cover connection portion of a wind turbine generator according to claim 5 , wherein
a diameter of said polytetrafluoroethylene washer is not larger than a diameter of said bolt.

7. The structure for a nacelle cover connection portion of a wind turbine generator according to claim 1 , wherein
straight portions of said first frame member and said second frame member extending in longitudinal directions of said first frame member and said second frame member are formed of metal and curved portions of said first frame member and said second frame member extending in the longitudinal directions are formed of fiber reinforced plastic.

8. A structure for a nacelle cover connection portion of a wind turbine generator, wherein a lower panel constituting a lower part of each side wall of a nacelle cover covering a nacelle of a wind turbine generator and an upper panel constituting an upper part of said side wall are connected to each other, the structure comprising:
a first frame member fixed to an inside surface of said nacelle cover and forming an upper end portion of said lower panel;
a second frame member fixed to an inside surface of said nacelle cover and forming a lower end portion of said upper panel, an upper surface of said first frame member and a lower surface of said second frame member being aligned with and fixed to each other so as to connect the upper end portion of said lower panel and the lower end portion of said upper panel in substantially the same plane;
a covering portion covering the upper end portion of said lower panel from the outside of the nacelle at a predetermined interval from the upper end portion of said lower panel, the covering portion being formed integrally with the lower end portion of said upper panel so as to protrude to the outside of said nacelle cover farther than the lower end portion of said upper panel; and
a plurality of bolts fastening the first frame member to the upper end portion of the lower panel, wherein
a part of the upper end portion of said lower panel opposite to the lower end of said covering portion is formed so as to protrude toward the lower end of said covering portion and to narrow an opening area of a space formed between the upper end portion of said lower panel and said covering portion,
a thickness of the covering portion and the lower end portion are the same, and
a thickness of the upper end portion and the lower panel are the same.

Assignees

• Kamibayashi Masakazu
• Hirano Haruhiko
• Numajiri Tomohiro
• Ito Kenji
• Honda Ikuo
• Fujioka Yoshihiro
• Mitsubishi Heavy Ind Ltd

Inventors

• Kamibayashi Masakazu
• Hirano Haruhiko
• Numajiri Tomohiro
• Ito Kenji
• Honda Ikuo
• Fujioka Yoshihiro

Classifications

• Y02P70/523

  Cross-Sectional Technologies · mapped topic

• Y02B10/30

  Wind power · CPC title

• F03D1/001

  Mechanical Engineering · mapped topic

• Y02E10/728

  Onshore wind turbines · CPC title

• F03D9/002 Primary

  Mechanical Engineering · mapped topic