CN211031288U

CN211031288U - Die assembly gap adjusting structure for direct bonding area of rear edge of wind power blade

Info

Publication number: CN211031288U
Application number: CN201922035106.6U
Authority: CN
Inventors: 刘梅; 刘广; 李江波; 赵亚男; 姜宏业; 杨潺
Original assignee: Guodian United Power Technology Baoding Co Ltd
Current assignee: Guoneng United Power Technology Baoding Co ltd
Priority date: 2019-11-22
Filing date: 2019-11-22
Publication date: 2020-07-17
Anticipated expiration: 2029-11-22

Abstract

The utility model discloses a regional compound die clearance adjustment structure of wind-powered electricity generation blade trailing edge direct bonding relates to a wind-powered electricity generation blade field, including the PVC cushion, lower enhancement layer and last enhancement layer for control trailing edge compound die clearance and frictioning thickness improve the bonding quality. The lower enhancement layer and the upper enhancement layer are a plurality of layers of glass fiber cloth and are used for coating the PVC cushion block. The upper reinforcing layer is used as an adhesive surface for adhering the shell. The utility model has the advantages that: (1) structural design is reasonable, and convenient operation reduces raw and other materials cost and man-hour cost. (2) The method can reduce wrinkles of the glass fiber cloth, reduce poor infiltration phenomena such as dry fibers and poor glue, and improve the quality and the production efficiency of the blade. (3) The die assembly gap of the direct bonding area at the rear edge of the blade can be effectively adjusted, the problem of thickness over-tolerance of the area is solved, and the bonding strength is improved. (4) The weight of the blade can be effectively reduced, the pneumatic performance of the trailing edge of the blade is improved, the strength of the blade is improved, and the service life of the blade is prolonged.

Description

Die assembly gap adjusting structure for direct bonding area of rear edge of wind power blade

Technical Field

The utility model relates to a wind-powered electricity generation blade field specifically is a regional compound die clearance adjustment structure of direct bonding of wind-powered electricity generation blade trailing edge.

Background

The wind power blade is characterized in that the trailing edge of the wind power blade is not provided with a direct bonding area of a bonding angle, and the section of the direct bonding area is a cavity close to a V shape. In the area, part of the die assembly clearance is larger than a design value, the condition of the thickness of the die assembly glue is out of tolerance, the bonding quality of the rear edge cannot be guaranteed, and the strength and the service life of the fan blade are further influenced.

Aiming at the problem that the mold closing gap of the direct bonding area of the trailing edge of the blade is out of tolerance, the current common solution is as follows: and embedding a plurality of layers of glass fiber cloth on the PS surface and the SS surface of the out-of-tolerance area respectively to reduce the mold closing gap, and then bonding. However, this solution has the following problems: (1) when the blade shell is paved in layers, the process is complex and has higher requirements, and a plurality of cloth layers are added to part of the positions, so that the manufacturing time of the blade shell is prolonged, the wrinkles are easy to appear, and the bonding strength is reduced; (2) when vacuum infusion is carried out, the cloth layer is too thick, poor infiltration phenomena such as dry fiber, poor glue and the like easily occur, maintenance is needed, and the product quality and the production efficiency are reduced; (3) the weight of the blade can be increased by pre-burying the multiple layers of glass fiber cloth, and the pneumatic performance and the mechanical performance of the rear edge of the blade are changed.

Therefore, it is necessary to design a method with reasonable structure and simple operation to solve the problem of the mold clamping gap in the direct bonding area of the blade trailing edge.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a regional compound die clearance adjustment structure of wind-powered electricity generation blade trailing edge direct bonding to solve the problem that proposes in the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme:

a mold closing gap adjusting structure for a direct bonding area of the rear edge of a wind power blade comprises a PVC cushion block, a lower reinforcing layer and an upper reinforcing layer.

The PVC cushion block can be made of PVC materials for manufacturing the blade, and other materials can be selected. The chord-wise width of the PVC cushion block is slightly wider than the bonding width of the rear edge of the blade, and the shape of the PVC cushion block is adjusted according to the die assembly gap at the use position. The lower enhancement layer and the upper enhancement layer are a plurality of layers of glass fiber cloth, and are respectively paved on the upper side and the lower side of the PVC cushion block to coat the PVC cushion block. The other side of the lower reinforcing layer is tightly adhered to the SS surface shell, and the other side of the upper reinforcing layer is used as an adhesive surface for adhering the shell.

Compared with the prior art, the beneficial effects of the utility model are that: (1) structural design is reasonable, and convenient operation reduces raw and other materials cost and man-hour cost. (2) The method can reduce wrinkles of the glass fiber cloth, reduce poor infiltration phenomena such as dry fibers and poor glue, and improve the quality and the production efficiency of the blade. (3) The die assembly gap of the direct bonding area at the rear edge of the blade can be effectively adjusted, the problem of thickness over-tolerance of the area is solved, and the bonding strength is improved. (4) The weight of the blade can be effectively reduced, the pneumatic performance of the trailing edge of the blade is improved, the strength of the blade is improved, and the service life of the blade is prolonged.

Drawings

FIG. 1 is a schematic structural view of the present invention when the shell is layered;

FIG. 2 is a schematic cross-sectional view of the present invention in a wind turbine blade;

in the figure: 1-PVC cushion block, 2-lower enhancement layer, 3-upper enhancement layer, 4-demoulding cloth, 5-isolation film and flow guide net, 6-spiral exhaust tube, 7-vacuum bag film, 8-SS face shell, 9-mould-closing glue and 10-PS face shell.

Detailed Description

The technical solution of the present patent will be described in further detail with reference to the following embodiments.

Referring to fig. 1-2, a PVC spacer 1, a lower reinforcement layer 2 and an upper reinforcement layer 3 form a mold clamping gap adjusting structure for controlling a rear edge mold clamping gap and a frictioning thickness, thereby improving the bonding quality. The PVC cushion block 1 can be made of PVC materials for manufacturing the blade, and can also be made of other materials. The chord-wise width of the PVC cushion block 1 is slightly wider than the bonding width of the rear edge of the blade, and the shape of the PVC cushion block is adjusted according to the mold closing gap at the use position. The lower enhancement layer 2 and the upper enhancement layer 3 are a plurality of layers of glass fiber cloth, and are respectively paved on the upper side and the lower side of the PVC cushion block 1 to coat the PVC cushion block 1. The other side of the lower reinforcing layer 2 is firmly attached to the SS surface shell 8, and the other side of the upper reinforcing layer 3 is used as an adhesive surface for adhering the shell.

The technical scheme of the utility model is that:

a. after the SS surface shell 8 is paved, laying the glass fiber cloth of the lower enhancement layer 2 in the direct bonding area of the rear edge of the blade, and firmly attaching the glass fiber cloth of the SS surface shell 8;

b. placing a PVC cushion block 1, wherein all blocks can be connected and fixed by resin nails to prevent deviation;

c. the glass fiber cloth of the upper enhancement layer 3 is required to be firmly attached to the PVC cushion block 1, and is flat and free of wrinkles;

d. laying vacuum auxiliary materials: laying a demolding cloth 4 in a direct bonding area at the rear edge of the SS surface shell 8, laying one side of the demolding cloth on a mold flange in the width direction, and completely covering the glass fiber cloth of the reinforcing layer 3 at the other side of the demolding cloth; the distance between the isolation film and the diversion net 5 and the parting line can be properly adjusted according to the vacuum infusion condition; the spiral exhaust pipe 6 is arranged on the flange edge of the blade mould; the vacuum bag film 7 needs to be provided with enough margin at the rear edge, and when the vacuum is pumped, the PVC cushion block 1 is checked to be shifted;

e. vacuum infusion and precuring are carried out on the blade SS surface shell 8, the die closing gap adjusting structure and the like, and then the working procedures of auxiliary material cleaning, trial die closing, die closing glue scraping and the like are completed according to the blade manufacturing process;

f. and (3) turning and closing the mold, wherein the mold closing gap adjusting structure is bonded with the PS surface shell 10 by mold closing glue 9, the thickness of the mold closing glue meets the design requirement, and the bonding quality is improved.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. The utility model provides a regional compound die clearance adjustment structure of wind-powered electricity generation blade trailing edge direct bonding, includes PVC cushion (1), lower enhancement layer (2) and last enhancement layer (3), its characterized in that, lower enhancement layer (2) and last enhancement layer (3) are the fine cloth of a plurality of layers of glass that are used for cladding PVC cushion (1), and last enhancement layer (3) are used for bonding the casing.

2. The mold closing gap adjusting structure for the direct bonding area of the rear edge of the wind turbine blade as claimed in claim 1, wherein the PVC cushion block (1) is respectively coated with a lower reinforcing layer (2) and an upper reinforcing layer (3) from top to bottom.

3. The mold closing gap adjusting structure for the direct bonding area of the rear edge of the wind turbine blade as claimed in claim 1 or 2, wherein the chord-wise width of the PVC cushion block (1) is wider than the bonding width of the rear edge of the blade.