IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0921613
(2006-07-14)
|
등록번호 |
US-8123883
(2012-02-28)
|
우선권정보 |
ES-200501729 (2005-07-15) |
국제출원번호 |
PCT/ES2006/000406
(2006-07-14)
|
§371/§102 date |
20071205
(20071205)
|
국제공개번호 |
WO2007/010064
(2007-01-25)
|
발명자
/ 주소 |
- Llorente González, José Ignacio
- Velez Oria, Sergio
|
출원인 / 주소 |
- Gamesa Innovation & Technology, S.L.
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
2 인용 특허 :
9 |
초록
▼
The invention relates to a method of producing large parts based on composite materials, such as the roots of blades for wind generators. The inventive method comprises the following steps consisting in: helically winding a band of fibre- and resin-based composite material around a mould; applying a
The invention relates to a method of producing large parts based on composite materials, such as the roots of blades for wind generators. The inventive method comprises the following steps consisting in: helically winding a band of fibre- and resin-based composite material around a mould; applying a removable protective sheet to the surface of the body; applying a heat-shrinkable strip to the sheet; compacting the laminate thus formed under a vacuum; curing the resin; aligning the cured body, machining the transverse surface to be applied to the blade and forming axial housings in said surface; and positioning and affixing inserts in the axial housings in order to secure the blade.
대표청구항
▼
1. A method of manufacturing large parts from composite materials, for manufacture of roots of blades for wind turbines, which includes shaping the root by applying fiber and resin-based composite materials to a mold and then curing, comprising the steps of: a) winding a tensioned band of fiber and
1. A method of manufacturing large parts from composite materials, for manufacture of roots of blades for wind turbines, which includes shaping the root by applying fiber and resin-based composite materials to a mold and then curing, comprising the steps of: a) winding a tensioned band of fiber and resin-based composite material helically around the mold in successive sweeps, to achieve a shaped laminated body of the desired thickness on all areas of the mold;b) applying a removable protective sheet that is porous to resin to the whole surface of the shaped laminated body;c) applying a heat-shrinkable strip to the protective sheet, continuously covering the whole protective sheet;d) compacting the shaped laminated body by vacuum;e) curing the resin, wherein the curing is independent from the interior and exterior of the shaped laminated body on the mold, maintaining control of the curing from the inside out, by applying the heat to the exterior of the shaped laminated body and through the mold and per controlling the temperatures by means of thermocouples previously fitted in the shaped laminated body, maintaining the compaction by vacuum to obtain a cured body, and then demolding the cured body;f) aligning the cured body and machining the transverse surface to be abutted to the blade, to achieve a flat surface perpendicular to the axis of the cured body, where some axial housings are formed; andg) placing and affixing inserts in the axial housings, for securing the cured body to a blade. 2. The method according to claim 1, wherein at least some of the steps of the method are carried out at different fixed stations, to which the mold is successively transported within the laminate body. 3. The method according to claim 1, wherein the band of composite material comprises two layers of fiber, between which there is a layer of resin and the band is obtained by a stratification of said layers. 4. The method according to claim 1, wherein a cover formed by the heat-shrinkable strip forms passages for extraction of air. 5. The method according to claim 4, wherein said passages are obtained by alternating strips of permeable material between some successive layers of the heat-shrinkable strip. 6. The method according to claim 1, wherein the mold on which the shaped laminated body is formed reproduces a shape of the element to be obtained, and the shaped laminated body determines an excess of material on the side with a greater section, that is removed by one or more peripheral cuts, that establish separable rings. 7. The method according to claim 1, wherein the mold on which the shaped laminated body is formed reproduces a shape of two elements to be obtained, adopting a symmetrical configuration with respect to a middle transverse plane that is the same as a greater section of the two elements to be obtained, where a peripheral cut is made to separate the two shaped elements. 8. The method according to claim 6, wherein the mold has, near the greater section coinciding with the area where the transverse cuts are in the molded body, a peripheral channel, and around this, before starting the winding of the band of composite materials, a soft filler material is placed and covered with an impervious sheet that is flush with the lateral surface of this mold, making the peripheral cuts coincide axially with said peripheral channel. 9. The method according to claim 1, wherein the axial housings for the inserts are machined in several stages to achieve a cylindrical external section and a conical internal section, decreasing towards the bottom, a conical coaxial core protrudes from this base, with a decreasing section that limits a ring-shaped space with the wall of the housing that decreases towards the bottom; and wherein the insert has a tubular structure, with an external diameter that coincides with the internal diameter of the housing, having a wall that is an internal section of decreasing thickness, that can be housed in the ring-shaped space of the housing. 10. The method according to claim 1, wherein the inserts are placed and affixed by the application of a resin to their lateral surface,the inserts are aligned with the axial housings and are introduced into the housings with a continuous gradual rotational movement, letting the inserts protrude partially,after a resin is applied around the part of the inserts that protrude, the resin is cured,the inserts are faced milled until their free transverse surface is located on the same plane perpendicular to the axis of the body. 11. The method according to claim 7, wherein the mold has a peripheral channel near the greater section coinciding with the area where the transverse cuts are located in the molded body, and around said peripheral channel, before starting the winding of the band of composite materials, a soft filler material is placed and covered with an impervious sheet that is flush with the lateral surface of the mold, making the peripheral cuts coincide axially with said peripheral channel.
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