CN212025543U

CN212025543U - Fluid perfusion promoting layer structure between plates and wind turbine blade

Info

Publication number: CN212025543U
Application number: CN201922283663.XU
Authority: CN
Inventors: 许浩然; 王洪荣; 张晨; 卫君杰; 肖红
Original assignee: Sunwell Jiangsu Carbon Fiber Composite Co ltd; Swancor New Material Technology Co ltd
Current assignee: Sunwell Jiangsu Carbon Fiber Composite Co ltd; Swancor New Material Technology Co ltd
Priority date: 2019-12-18
Filing date: 2019-12-18
Publication date: 2020-11-27
Anticipated expiration: 2029-12-18

Abstract

The utility model discloses a fluid fills promotion layer structure between panel relates to wind turbine blade and makes technical field, include the fabric who is woven by many fibre yarn bundles and forms, fabric evenly is provided with many stereoplasm strips along warp and/or woof direction, the bending resistance of stereoplasm strip is greater than the bending resistance of fibre yarn bundle promotes fabric's hardness through sneaking into stereoplasm strip in fabric or directly utilizing fibre sizing glue for tailor and lay as filling the fabric that the promotion layer was used more easily, promotes and lays efficiency, simultaneously, and fabric is difficult for producing the fold when laying, reduces the quantity of hole or bubble between the panel when promoting filling efficiency, promotes the structural strength of later stage blade.

Description

Fluid perfusion promoting layer structure between plates and wind turbine blade

Technical Field

The utility model relates to a wind turbine blade makes technical field, and more specifically says that it relates to a fluid perfusion promotes layer structure and wind turbine blade between panel.

Background

With the continuous development of clean energy, wind power generation is increasingly favored due to its low pollution and renewable characteristics. The wind power generator, i.e. the wind turbine, is the core component of the whole wind power generation system, and the performance of the wind turbine blade is an important index for measuring the performance of the whole wind turbine.

Wind turbine blades are typically constructed of resin and fiber, and have the advantages of light weight and high fatigue resistance. Current wind turbine blades, such as the one disclosed in chinese patent publication No. CN105899349A, specifically disclose a method of manufacturing a wind turbine blade in a blade mould, the wind turbine blade being formed by stacking a plurality of sheets, said stacked sheets being placed in an infusion mould cavity, and the individual sheets being bonded together by means of a liquid binder, typically a resin, to form the blade.

Because the gap between two adjacent plates is too small, the flowing resin is difficult to completely enter between the two adjacent plates, and further cavities are formed or air bubbles are left between the plates, and the existence of the cavities or the air bubbles greatly reduces the bonding stability between the plates and the structural strength of the blade. To this end, chinese patent No. CN1915649A, filed by the U.S. general electric company, proposes a method for manufacturing a continuous laminate sheet that can be used for manufacturing a cylindrical cover for a rotor blade, in which grooves are formed on the upper and lower surfaces of the sheets in order to enable resin to be uniformly impregnated between the adjacent sheets. Although the method realizes the uniform infusion of the resin, the opening of the grooves destroys the continuity of the fibers on the surface of the board and reduces the structural strength of the board. Chinese patent No. CN107073888A, filed by denmark vistas wind system limited, proposes an improvement of a reinforcing structure for a wind turbine blade, as another solution, whose general idea is: the fabric of a plurality of twisted yarns is used as a perfusion promoting layer, the gap between the plates is increased, so that resin can be uniformly perfused between two adjacent plates, and in the process, the woven texture of the fabric can be used as a resin flowing channel.

In production practice, it has been found that fabrics using the above twisted yarns as the infusion-promoting layer have many drawbacks, the most notable of which are: because the fabric is very thin and the material is very soft, wrinkles are very easy to generate when the fabric is laid on the plates, and then the uniformity and the continuity of the resin flow channel are damaged, so that the resin is not easy to be uniformly poured between two adjacent plates. Meanwhile, the laying efficiency of the perfusion promoting layer is greatly reduced.

SUMMERY OF THE UTILITY MODEL

The filling promotion layer that constitutes to fibre knitting produces the fold easily when laying among the practical application for the resin fills the problem inhomogeneous and that lay the inefficiency, the utility model aims at providing a fluid fills promotion layer structure between panel, can show the homogeneity of filling that improves the resin, promotes the efficiency that sets up that fills the promotion layer. Based on above-mentioned promotion layer structure that fills, the utility model discloses a second purpose lies in providing a wind turbine blade, has that structural stability is strong, advantage that production efficiency is high, and concrete scheme is as follows:

the fluid perfusion promoting layer structure between the plates comprises a fiber fabric woven by a plurality of fiber yarn bundles, wherein a plurality of hard strips are uniformly arranged on the fiber fabric along the warp and/or weft directions, and the bending resistance of the hard strips is greater than that of the fiber yarn bundles.

Through above-mentioned technical scheme, utilize the hardness of stereoplasm strip to support fabric, make it lay on panel fast, be difficult for producing the fold when laying simultaneously, promote the homogeneity that blade forming in-process resin was filled and the efficiency of filling, also be difficult for producing cavity or bubble between the later stage panel.

Further, the hard strips are configured into a plurality of fiber yarn bundles coated or soaked with fiber sizing glue.

Through the technical scheme, the production of the hard strips can be facilitated, namely the fiber sizing glue is directly coated on the fiber yarn bundle or the fiber yarn bundle is soaked in the fiber sizing glue before weaving, and the weaving is completed before the fiber sizing glue is not solidified.

Furthermore, the fiber fabric is formed by interweaving warp yarns and weft yarns one above the other, and fiber yarn bundles forming the fiber fabric are coated or soaked with fiber sizing glue.

Through above-mentioned technical scheme, directly utilize plain weave to weave and combine the fibre sizing glue, promote whole fabric's hardness, avoid producing the fold at the laying process.

Further, the fiber yarn bundle arrangement density of the fiber fabric along the resin flowing direction is larger than the fiber yarn bundle arrangement density perpendicular to the resin flowing direction.

Through above-mentioned technical scheme, the big clearance that sets up along the resin flow direction forms big resin flow channel, is favorable to the flow of resin for resin fills more evenly, has also promoted the infusion efficiency of resin to a certain extent.

Further, the warp direction linear density of the fiber fabric is configured to be 30tex to 40tex, and the arrangement density of the fiber yarn bundles is 40 to 60 pieces/10 cm;

the weft linear density of the fiber fabric is configured to be 100tex-1500tex, and the arrangement density of fiber yarn bundles is 25-30 pieces/10 cm;

the basis weight of the fiber fabric is configured as follows: 60-90g/m 2.

Through the technical scheme, the mechanical property of the perfusion promoting layer is also ensured while the perfusion efficiency of the perfusion promoting layer is improved.

Further, the thickness of the fiber fabric is configured to be 0.11mm-0.13 mm;

the mesh spacing of weft yarn bundles is configured to be 2.0-3.0 mm.

Through the technical scheme, the resin is more favorable for flowing and soaking, and the discharge of bubbles between the plates is facilitated.

Furthermore, the fiber yarn bundle is set as a glass fiber yarn bundle, and the fiber sizing adhesive is configured into a glass fiber sizing adhesive.

A wind turbine blade comprising a plurality of sheets of a fibre polymer, a fluid infusion promoting layer structure between adjacent sheets as described above and a wind turbine blade.

Through the technical scheme, the production efficiency of the wind turbine blade can be improved, and the structural strength of the wind turbine blade is increased due to the fact that cavities and bubbles between the plates are obviously reduced.

Compared with the prior art, the beneficial effects of the utility model are as follows:

(1) the hardness of the fiber fabric is improved by mixing the hard strips into the fiber fabric or directly utilizing the fiber sizing adhesive, so that the fiber fabric used as a perfusion promoting layer is easier to cut and lay, the laying efficiency is improved, meanwhile, the fiber fabric is not easy to generate wrinkles during laying, the number of holes or bubbles between plates is reduced while the perfusion efficiency is improved, and the structural strength of the later-stage blade is improved;

(2) through the density of fibre yarn bundle in the fibre fabric warp direction of rationally arranging and the latitudinal direction, form the passageway that supplies the resin to flow for the pouring of resin is more smooth and easy quick in the blade forming process, promotes the infusion efficiency, is favorable to the discharge of bubble between the panel simultaneously.

Drawings

FIG. 1 is a schematic structural view of a fiber fabric;

fig. 2 is a schematic view of a fiber yarn bundle coated with a fiber sizing adhesive.

Reference numerals: 1. a fiber yarn bundle; 2. warp yarns; 3. a weft yarn; 4. a hard strip; 5. fiber sizing glue; 6. a perfusion promoting layer structure.

Detailed Description

The present invention will be described in further detail with reference to the following examples and drawings, but the embodiments of the present invention are not limited thereto.

An inter-panel fluid infusion promoting layer structure, as shown in fig. 1, includes a fiber fabric woven from a plurality of fiber yarn bundles 1. The fiber fabric is woven by plain weave, and the fiber can be glass fiber. The fiber fabric is uniformly provided with a plurality of hard strips 4 along the directions of the warp yarns 2 and/or the weft yarns 3, and the bending resistance of the hard strips 4 is larger than that of the fiber yarn bundles 1. Preferably, above-mentioned stereoplasm strip 4 all has the setting along

warp

2 and 3 directions of woof, utilizes the hardness of stereoplasm strip 4 to support the fabric, makes it can lay on panel fast, is difficult for producing the fold when laying simultaneously, promotes the homogeneity and the efficiency of pouring of resin among the blade forming process, also is difficult for producing cavity or bubble between the later stage panel.

In the present embodiment, as shown in fig. 2, the hard strips 4 are configured as a plurality of fiber yarn bundles 1 coated or impregnated with fiber sizing glue 5, and the fiber sizing glue 5 may be glass fiber sizing glue. Through above-mentioned technical scheme, can be convenient for the production of stereoplasm strip 4, directly glue 5 cladding with the fibre is stereotyped promptly on fibre yarn bundle 1 or soak fibre yarn bundle 1 in the fibre is stereotyped glues 5 before weaving, accomplish before fibre is stereotyped glues 5 and is not solidified and weave, the fabric after the shaping alright in order to have considerable hardness on the settlement direction, difficult production fold when laying, also be convenient for tailor.

Preferably, in this embodiment, the fiber yarn bundles 1 constituting the fiber fabric are coated or impregnated with the fiber sizing glue 5. In the specific production process, the woven fiber fabric can be directly and integrally immersed into the fiber sizing glue 5, and then taken out to be solidified by the fiber sizing glue 5.

In order to facilitate the flowing of resin, the resin is poured more uniformly, the arrangement density of the fiber yarn bundles 1 of the fiber fabric along the flowing direction of the resin is greater than the arrangement density of the fiber yarn bundles 1 perpendicular to the flowing direction of the resin, and the resin pouring efficiency is improved to a certain extent by the arrangement.

In detail, in a specific embodiment, the warp linear density of the fiber fabric is configured to be 30tex to 40tex, and the arrangement density of the fiber yarn bundle 1 is 40 to 60 pieces/10 cm.

The weft linear density of the fiber fabric is configured to be 100tex-1500tex, and the arrangement density of the fiber yarn bundle 1 is 25-30 pieces/10 cm.

The basis weight of the fiber fabric is configured as follows: 60-90g/m 2.

Experiments show that the fiber fabric under the parameter conditions can improve the perfusion efficiency of the perfusion promoting layer and ensure the mechanical property of the perfusion promoting layer.

Further, the thickness of the fiber fabric is configured to be 0.11mm-0.13 mm;

the mesh spacing of weft yarn bundles is configured to be 2.0-3.0 mm.

Experiments show that the resin flow and infiltration are facilitated and the discharge of bubbles between the plates is facilitated within the parameter range.

Based on above-mentioned fluid fills between panel and promotes layer structure 6, the utility model discloses still provide a wind turbine blade, including a plurality of panels that constitute by fiber polymer, be provided with between adjacent two-layer panel as before fluid fills between panel and promotes layer structure 6 and wind turbine blade.

In the production of the wind turbine blade described above, a plurality of sheets are stacked and then placed in the casting cavity, similar to the conventional practice. When stacking the sheets, the aforementioned inter-sheet fluid infusion promoting layer structure 6, i.e., the fiber fabric, may be laid between the adjacent sheets. The blade that the later stage generated compares in current blade, has higher structural strength, and the efficiency that whole resin was filled also obtains obvious promotion.

It is above only the utility model discloses a preferred embodiment, the utility model discloses a scope of protection does not only confine above-mentioned embodiment, the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. The fluid perfusion promoting layer structure between the plates comprises a fiber fabric woven by a plurality of fiber yarn bundles (1), and is characterized in that the fiber fabric is uniformly provided with a plurality of hard strips (4) along the directions of warps (2) and/or wefts (3), and the bending resistance of the hard strips (4) is greater than that of the fiber yarn bundles (1).

2. The structure of the fluid infusion promoting layer between sheets according to claim 1, wherein the stiff strips (4) are configured as a plurality of fiber yarn bundles (1) coated or impregnated with fiber sizing glue (5).

3. The interplate fluid infusion promoting layer structure (6) according to claim 1, wherein the fiber fabric is formed by interweaving warp yarns (2) and weft yarns (3) one above the other, and fiber yarn bundles (1) forming the fiber fabric are coated or impregnated with fiber sizing glue (5).

4. The structure of the fluid infusion-promoting layer between sheets as claimed in claim 1, wherein the fiber fabric has a greater density of arrangement of the fiber yarn bundles (1) in the resin flow direction than the fiber yarn bundles (1) perpendicular to the resin flow direction.

5. The structure of the fluid infusion promoting layer between boards as claimed in claim 4, wherein the density of the warp direction lines of the fiber fabric is configured to be 30tex-40tex, and the arrangement density of the fiber yarn bundles (1) is 40-60 pieces/10 cm;

the weft linear density of the fiber fabric is configured to be 100tex-1500tex, and the arrangement density of the fiber yarn bundles (1) is 25-30 pieces/10 cm;

the basis weight of the fiber fabric is configured as follows: 60-90g/m 2.

6. The inter-panel fluid infusion promoting layer structure of claim 5, wherein a thickness of the fiber fabric is configured to be 0.11mm-0.13 mm;

the mesh spacing of weft yarn bundles is configured to be 2.0-3.0 mm.

7. The interplate fluid infusion promoting layer structure according to claim 2, wherein the fiber yarn bundle (1) is provided as a glass fiber yarn bundle (1), and the fiber sizing adhesive (5) is configured as a glass fiber sizing adhesive.

8. A wind turbine blade comprising a plurality of sheets of fibre polymer, characterised in that an inter-sheet fluid infusion promoting layer structure (6) according to any of claims 1-7 is arranged between two adjacent sheets.