CN113123925B - Beam, blade machining method and wind turbine generator - Google Patents

Beam, blade machining method and wind turbine generator Download PDF

Info

Publication number
CN113123925B
CN113123925B CN202110362558.4A CN202110362558A CN113123925B CN 113123925 B CN113123925 B CN 113123925B CN 202110362558 A CN202110362558 A CN 202110362558A CN 113123925 B CN113123925 B CN 113123925B
Authority
CN
China
Prior art keywords
fabric
blade
strip
adhesive
interlayer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202110362558.4A
Other languages
Chinese (zh)
Other versions
CN113123925A (en
Inventor
宋秋香
吕兵
牛娟娟
王刚
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sinomatech Wind Power Blade Co Ltd
Original Assignee
Sinomatech Wind Power Blade Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sinomatech Wind Power Blade Co Ltd filed Critical Sinomatech Wind Power Blade Co Ltd
Priority to CN202110362558.4A priority Critical patent/CN113123925B/en
Publication of CN113123925A publication Critical patent/CN113123925A/en
Application granted granted Critical
Publication of CN113123925B publication Critical patent/CN113123925B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D1/00—Wind motors with rotation axis substantially parallel to the air flow entering the rotor 
    • F03D1/06—Rotors
    • F03D1/065—Rotors characterised by their construction elements
    • F03D1/0675—Rotors characterised by their construction elements of the blades
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/28—Shaping operations therefor
    • B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
    • B29C70/36—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and impregnating by casting, e.g. vacuum casting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/08—Blades for rotors, stators, fans, turbines or the like, e.g. screw propellers
    • B29L2031/082—Blades, e.g. for helicopters
    • B29L2031/085—Wind turbine blades
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/72—Wind turbines with rotation axis in wind direction

Abstract

The application provides a beam, a blade processing method and a wind turbine generator. The bar extends in a longitudinal direction of the beam, and the plurality of bars are arranged in a stack in a thickness direction of the beam. An interlay er fabric is disposed between at least some of the strips. The adhesive is filled between adjacent strips and between the interlay er fabric and the strips. The weight of the interlaminar fabric between two adjacent strip-shaped pieces is A, the weight of the corresponding adhesive is B, and A/(A + B) is more than or equal to 57 percent and less than or equal to 72 percent. The beam provided by the embodiment of the application is provided with the interlayer fabric between the strip-shaped pieces, so that the structural strength of the beam is improved. In addition, the weight ratio of the interlaminar fabric to the interlaminar fabric in the adhesive is 57-72 percent between two adjacent strip-shaped pieces, namely the content of the interlaminar fabric between the two adjacent strip-shaped pieces is low, so that the flow guide effect is better, the flow uniformity of the adhesive between the interlaminar fabric and the strip-shaped pieces is improved, and the structural stability and the structural strength of the beam are further improved.

Description

Beam, blade machining method and wind turbine generator
Technical Field
The invention belongs to the technical field of wind power generation, and particularly relates to a beam, a blade machining method and a wind turbine generator.
Background
The blades of wind turbines are generally externally profiled by a shell body, the interior of which is loaded using a beam-web structure, the beam being the main load-bearing component. In recent years, the wind power industry has begun to manufacture the beams of the blades by stacking and combining strips that intercept the bending loads of the blades in the direction of rotation, and pouring an adhesive to integrate the beams with the body of the shell of the blades.
However, after the blades in the prior art are poured and molded, the structural strength of the blades is low, and the increasing requirements of the wind turbine generator set on the strength of the blades in the prior art are difficult to meet.
Disclosure of Invention
The embodiment of the invention provides a wind turbine generator, a blade and a beam thereof, which can improve the structural strength of the blade.
In a first aspect, an embodiment of the present invention provides a spar for a blade, comprising: a bar extending in a longitudinal direction of the beam, and a plurality of the bar being stacked in a thickness direction of the beam; an interlayer fabric extending in longitudinal and width directions of the beam, the interlayer fabric being disposed between at least some of the strips; and the adhesive is filled between the adjacent strip-shaped pieces and between the interlayer fabric and the strip-shaped pieces, wherein the mass of the interlayer fabric between the two adjacent strip-shaped pieces is A, and the mass of the corresponding adhesive is B, and A/(A + B) is more than or equal to 57 percent and less than or equal to 72 percent.
According to a first aspect of an embodiment of the invention, 60% or more of A/(A + B) or less 66%; and/or the interlayer fabric comprises glass fiber yarns, and the linear density of the glass fiber yarns is 100 tex-600 tex.
According to a first aspect of embodiments of the present invention, the interlaminar fabric comprises fiber yarns arranged in two intersecting directions, the fiber yarns in the two directions being layered separately; alternatively, the fiber yarns in both directions are interwoven as one layer.
According to the first aspect of the embodiment of the present invention, the size of the interlaminar fabric is larger than the size of the strip in the width direction of the beam.
In a second aspect, embodiments of the present invention provide a blade, comprising: the shell body is a hollow structure body; a beam, as described in any of the above embodiments, connected to a wall of the housing body, the longitudinal direction of the beam extending in a direction from a blade root to a blade tip of the blade; and a core material filled in the case body, the core material being connected to the beam by the adhesive.
According to the second aspect of the embodiment of the present invention, the blade further includes a filler filled between the core material and the beam, and the filler and the core material are connected by the adhesive.
According to a second aspect of an embodiment of the present invention, the filling body is bulked yarn, glass fiber, carbon fiber, or spray cotton.
According to a second aspect of the embodiments of the present invention, a side of the beam close to the blade tip is formed with a tapered thickness region, and a thickness of at least a part of the strip decreases gradually from a side of the tapered thickness region away from the blade tip to a side close to the blade tip.
According to a second aspect of the embodiment of the present invention, the blade further includes a fiber fabric laid on a side of the thickness-tapered region close to the wall portion of the shell body and extending to the blade tip.
In a third aspect, an embodiment of the present invention provides a wind turbine generator, including the blade provided in any one of the above embodiments.
In a fourth aspect, an embodiment of the present invention provides a method for machining a blade, which is used to machine the blade provided in any one of the above embodiments, and includes the following steps: laying a first skin fabric on a mould of the blade shell; placing the strip-shaped piece and the interlayer fabric on the first covering fabric in a stacking mode; laying a fiber fabric on the uppermost strip, wherein the fiber fabric extends from one side, far away from the blade tip, of the strip in the thickness reducing area to the blade tip; laying the core material on two sides of the strip in the width direction; laying a second covering fabric; the adhesive is poured and curing is completed.
According to a fourth aspect of the present invention, the strips and the inter-layer fabric laminated on the first skin fabric are preforms.
According to the beam, the blade, the processing method of the blade and the wind turbine generator, provided by the embodiment of the invention, the interlayer fabric is arranged between at least part of the strip-shaped parts in the beam, so that the structural strength and the structural stability of the beam are favorably improved. In addition, between two adjacent strips, the mass content of the interlayer fabric in the interlayer fabric and the adhesive is 57% -72%, the mass content of the interlayer fabric between the adjacent strips is lower, and in the process of pouring the adhesive, the uniformity of the adhesive flowing through the interlayer fabric is improved, bubbles generated between the interlayer fabric and the strips are reduced, so that the structural strength and the structural stability of the beam are improved, and the structural strength of the blade is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments of the present invention will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a sectional view of a portion of a blade according to one embodiment of the present invention;
FIG. 2 is a front view of one orientation of a beam provided in accordance with one embodiment of the present invention;
FIG. 3 is a schematic structural view of a beam according to another embodiment of the present invention;
FIG. 4 is a right side view of FIG. 2;
FIG. 5 is a schematic structural view of a beam according to yet another embodiment of the present invention; and
FIG. 6 is a flow chart of a method of manufacturing a blade according to one embodiment of the present invention.
In the drawings:
1. a beam; 11. a strip-shaped member; 12. an interlaminar fabric; 13. a binder; 2. a core material; 3. a covering fabric; 31. a first cover fabric; 32. a second cover fabric; 4. a housing body.
Detailed Description
Features and exemplary embodiments of various aspects of the present invention will be described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present invention by illustrating examples of the present invention.
The directional terms used in the description of the present application are used for convenience in describing the present application and for simplicity in description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present application. It should be noted that the terms "thickness direction", "width direction" and "longitudinal direction" in the description of the present application indicate orientations based on the orientations shown in fig. 2 to 5.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The embodiments will be described in detail below with reference to the accompanying drawings.
In a first aspect, embodiments of the present application provide a beam 1 for a blade, as shown in fig. 1 to 4, the beam 1 comprising a strip 11, an interlayer fabric 12 and an adhesive 13. The strip 11 extends in the longitudinal direction of the beam 1, and a plurality of strips 11 are arranged in a stack in the thickness direction of the beam 1. The interlayer fabric 12 extends in the longitudinal and width directions of the beam 1, the interlayer fabric 12 is disposed between at least some of the strips 11 of the plurality of strips 11, and the adhesive 13 is filled between the adjacent strips 11 and between the interlayer fabric 12 and the strips 11. The mass of the interlayer fabric 12 between two adjacent strips 11 is A, the mass of the corresponding adhesive 14 is B,57% or more and A/(A + B) or less and 72% or less, and for example, the mass can be 57%, 60%, 65%, 68%, 70% or 72%, etc.
Specifically, as shown in fig. 2, an interlayer fabric 12 may be provided between each adjacent strip 11 in the plurality of strips 11; as shown in fig. 3, an interlayer fabric 12 may be disposed between some adjacent strips 11, without limitation. The material of the interlaminar fabric 12 between different strips 11 may be the same or different, and is selected according to actual needs. It should be noted that "a" and "B" are defined for the case where the interlayer fabric 12 is provided between the adjacent strips 11, and there is no description of "a" or "B" for the case where the interlayer fabric 12 is not provided between the adjacent strips 11.
The adhesive 13, which may be a resin or polyester, is poured between the adjacent strips 11 and the interlay er fabric 12 and strips 11, and is impregnated into the interlay er fabric 12, and the cured adhesive 13 has the function of connecting the adjacent strips 11 and the interlay er fabric 12 and strips 11.
It should be noted that the adhesive 13 is impregnated into the interlayer fabric 12 after being poured, the adhesive 13 is integrally formed with the interlayer fabric 12 after being cured, and the structures shown in fig. 2 to 4 are schematic structures shown for convenience of description of the present application.
The forming manner of the strip 11 is not limited, and for example, the strip 11 may be a pultruded plate, which has better mechanical properties and is more convenient for manufacturing and processing. In addition, the bar 11 may be straight or may be designed to have a curved shape adapted to the housing body 4 according to the structure of the housing body 4 to be engaged therewith.
The interlayer fabric 12 may be integrally formed, or may be formed by separately forming and splicing a plurality of structures, which is not limited herein. Illustratively, the interlayer fabric 12 is of a unitary structure, and the interlayer fabric 12 disposed between the strips 11 is flat and does not wrinkle or break, so that the interlayer fabric 12 is disposed to improve the tensile strength of the beam 1.
According to the beam 1 provided by the embodiment of the application, the interlayer fabric 12 is arranged between at least part of the strip-shaped pieces 11, the interlayer fabric 12 has certain strength and toughness, and compared with the stacking of only the strip-shaped pieces 11, the arrangement of the interlayer fabric 12 is beneficial to improving the structural strength of the beam 1. The content of the interlayer fabric 12 between the interlayer fabric 12 and the adhesive 13 is 57% -72% between the adjacent strips 11, that is, the content of the interlayer fabric 12 between the adjacent strips 11 is lower than the content of the fiber in the strips 11 by at least 5%, and in the process of pouring the adhesive 13, the flow uniformity of the adhesive 13 flowing through the interlayer fabric 12 is improved, so that the adhesive 13 between the interlayer fabric 12 and the strips 11 is distributed more uniformly, the risk of bubbles generated between the interlayer fabric 12 and the strips 11 is effectively reduced, and the structural strength and the structural stability of the beam 1 are further improved.
It will be appreciated that a single layer of interlay er fabric 12 may be provided between adjacent strips 11, thus providing greater tensile strength; it is also possible to provide a multilayer interlayer fabric 12 between adjacent strips 11, which has a strong bending strength. And is selected according to specific requirements without limitation.
The specific numerical value of the mass content of the interlaminar fabric 12 between the adjacent strips 11 is not limited, and only needs to be in the range of 57-72%. Illustratively, 60% ≦ A/(A + B) ≦ 66%, i.e., 60% to 66% by mass of the interlay er fabric 12 between adjacent strips 11, e.g., 60%, 61%, 62%, 63%, 64%, 65%, or 66%, etc. Thus, the flow uniformity of the adhesive 13 flowing through the interlayer fabric 12 can be controlled within a good range, the risk of air bubbles being generated between the interlayer fabric 12 and the strip 11 is further reduced, and the structural strength and the structural stability of the beam 1 are improved.
In one embodiment, the interlaminar fabric 12 comprises fiberglass yarns having a linear density of 100tex to 600tex, such as 100tex, 150tex, 200tex, 250tex, 300tex, 400tex, 500tex, or 600tex. That is to say, the linear density of the interlayer fabric 12 is low, the space occupied by the interlayer fabric 12 is small, and the increase of the gap between the interlayer fabric 12 and the strip-shaped member 11 is facilitated, so that the flowing space of the adhesive 13 is increased, the flowing resistance of the adhesive 13 is reduced, the flowing speed and the flowing uniformity of the adhesive 13 are improved, the risk of bubbles generated between the interlayer fabric 12 and the strip-shaped member 11 is effectively reduced, and the structural strength and the structural stability of the beam 1 are improved.
It should be noted that "tex" in the description of the present application refers to units of linear density, meaning grams of weight per 1000 meters of yarn at a given moisture regain.
The specific value of the linear density of the glass fiber yarn is not limited, and for example, the linear density of the interlayer fabric 12 is 200tex to 300tex, which is advantageous for controlling the flow rate of the adhesive 13 flowing through the interlayer fabric 12 within a proper range, thereby further improving the flow uniformity of the adhesive 13. .
The areal density of the interlayer fabric 12 is not limited, and, for example, the areal density of the interlayer fabric 12 may be set to less than 600gsm (grams per square meter), or less than 300gsm. The density of the surface of the interlayer fabric 12 is small, so that the volume of the interlayer fabric 12 can be reduced, and the flow guiding uniformity of the interlayer fabric 12 can be improved.
In one embodiment, the interlayer fabric 12 includes fiber yarns, the fiber yarns are arranged in two intersecting directions, and the fiber yarns in the two directions may intersect at a vertical angle or at an acute angle, such as an included angle of 45 ° or 60 °, which is not limited herein. The fiber yarns are arranged along two crossed directions, and the adhesive 13 flowing through the interlayer fabric 12 can flow along two directions along with the trend of the fiber yarns, so that the flow guiding uniformity of the interlayer fabric 12 is improved, and the structural strength and the structural stability of the beam 1 are further improved.
The layering of the two directional fiber yarns is not limited, and in some embodiments, the two directional fiber yarns are layered separately, i.e., the two directional fiber yarns are layered unidirectionally, such as in a biaxial fabric. In other embodiments, the two directions of fiber yarns are interwoven as a layer, such as a plain weave.
It is understood that the kinds of the fiber yarns in the two directions may be the same or different, and in addition, the linear densities of the fiber yarns in the two directions may be the same or different, which is not limited herein.
In some embodiments, the fiber yarns in the two directions are glass fiber yarns, and the glass fiber yarns are biaxial fabrics of ± 45 degrees, so that the structural stability of the beam 1 is improved, and the pouring speed of the adhesive 13 between the strip-shaped member 11 and the interlayer fabric 12 is increased.
In other embodiments, the fiber yarns in one direction are carbon fiber yarns, the fiber yarns in the other direction are glass fiber yarns, the carbon fiber yarns are arranged along the longitudinal direction of the beam 1, and the glass fiber yarns are arranged along the width direction of the beam 1. The arrangement is favorable for improving the flow guiding speed of the interlayer fabric 12 in the width direction, and the blade has certain lightning protection effect in the embodiment that the beam 1 is applied to the blade.
It is understood that the fiber yarn may be a non-twisted yarn or a twisted yarn, and when the fiber yarn is a non-twisted yarn, the flow guiding speed of the inter-layer fabric 12 is further improved.
The size of the interlay er fabric 12 and the size of the strips 11 in the width direction of the beam 1 are not limited.
In some embodiments, as shown in fig. 2 and 3, the dimension of the interlay er fabric 12 is greater than the dimension of the strip 11 along the width of the beam 1. As such, along the width of the beam 1, there will be portions of the interlay er fabric 12 that are outside the strip 11. In the embodiment of the blade in which the beam 1 is applied, the interlayer fabric 12 located outside the strip 11 is filled between the core 2 and the shell body 4, which is beneficial to reducing the gap between the beam 1 and the core 2 and improving the structural performance of the blade.
In other embodiments, referring to fig. 5, the dimension of the interlay er fabric 12 corresponds to the dimension of the strip 11 along the width of the beam 1.
The specific value that the size of the interlayer fabric 12 is greater than the size of the strip 11 in the width direction of the beam 1 is not limited, and the interlayer fabric 12 is greater than the width of the strip 11 by more than 30mm, for example, to better reduce the gap between the beam 1 and the core material 2.
In a second aspect, embodiments of the present application provide a blade, as shown in fig. 1, including a shell body 4, a beam 1, and a core material 2. The casing body 4 is a hollow structure, the beam 1 is the beam 1 provided in any of the above embodiments, the beam 1 is connected to a wall portion of the casing body 4, and a longitudinal direction of the beam 1 extends in a direction from a blade root to a blade tip of the blade. The core material 2 is filled in the case body 4, and the core material 2 and the beam 1 are connected by an adhesive 13.
It should be noted that the shell body 4 in the above embodiments is a composite structure formed by the skin fabric 3 after the potting adhesive 13 is cured. The connection between the beam 1 and the housing body 4 may be a direct connection or an indirect connection, which is not limited herein. Illustratively, as shown in fig. 1, the beam 1 is abutted with the skin fabric 3, an adhesive 13 is poured between the beam 1 and the skin fabric 3, and after the adhesive 13 is infiltrated into the skin fabric 3 and cured, the skin fabric 3 is connected with the beam 1.
The blade provided by the embodiment of the application adopts the beam 1 provided by any one of the embodiments, so that the structural strength and the structural stability of the blade can be effectively improved.
In an embodiment, the blade further comprises a filler (not shown) filled between the core 2 and the beam 1, the filler and the beam 1, and the filler and the core 2 being connected by an adhesive 13. Specifically, before the adhesive 13 is poured, the filler is filled between the core material 2 and the beam 1, and in the process of pouring the adhesive 13, the adhesive 13 flows into between the filler and the beam 1 and also between the filler and the core material 2, and after the adhesive 13 is cured, the filler and the beam 1 and the filler and the core material 2 can be connected. The strip-shaped parts 11 in the beam 1 are easy to deform under stress, and the existence of the filling body can effectively prevent the problem that the gap between the beam 1 and the core material 2 is too large when the strip-shaped parts 11 deform under stress.
The material of the filler may be various, and is not limited herein. Illustratively, the filling material is expanded yarn, glass fiber, carbon fiber or sprayed foam, and the adhesive 13 is more easily impregnated into the expanded yarn, the glass fiber, the carbon fiber or the sprayed foam, which contributes to the improvement of the bonding strength between the expanded yarn or the sprayed foam and the core material 2 and the beam 1. And the expanded yarn or the glue spraying surface has better shape following performance, can be better matched with the shapes of the core material 2 and the beam 1, and can reduce the gap between the core material 2 and the beam 1 to the maximum extent.
In one embodiment, as shown in fig. 4, the side of the beam 1 close to the blade tip is formed with a region with a gradually decreasing thickness, and the thickness of at least part of the strip 11 gradually decreases from the side of the region with the gradually decreasing thickness away from the blade tip to the side close to the blade tip. Specifically, the thickness of the strip 11 in the region with the gradually reduced thickness may be gradually reduced by cutting, and the strip 11 may be cut on two sides of the strip in the thickness direction, or only one side of the strip, and the surface formed after cutting may be a straight surface or a curved surface, which is not limited herein.
It can be understood that the hollow space of the region of the shell body 3 close to the blade tip is gradually reduced, and by arranging the thickness reducing region, the longitudinal extension length of the beam 1 can be increased, the strength of the blade can be effectively increased, the phenomenon that the strip pieces 11 mutually stacked in the thickness direction are crowded and stacked at the blade tip part of the blade can be effectively prevented, and the risk that the strip pieces 11 are damaged is reduced.
The specific length of the thickness-reducing region is not limited, and may be specifically set according to the shape of the hollow structure of the shell body 4 of the blade near the blade tip region.
Further, in an embodiment, the blade further includes a fiber fabric, and the fiber fabric is laid on a side of the wall portion of the shell body 4 in the thickness-tapered region and extends to the blade tip. It can be understood that, because the beam 1 has a certain thickness, it is difficult to extend to the tip of the blade, and by providing the fiber fabric, the gap between the beam 1 and the shell body 4 can be reduced, and the structural strength of the blade can be improved. In addition, due to the strong deformability of the fabric, the fabric can be filled in areas of the blade tip that are difficult to reach by the beam 1, further improving the structural strength of the blade.
The specific material of the fiber fabric is not limited, and for example, the fiber fabric is a uniaxial fiber fabric, and the fibers in the uniaxial fiber fabric are arranged in the direction from the blade root to the blade tip, and the uniaxial fiber fabric can further improve the bearing capacity of the beam 1. In addition, in the process of pouring the adhesive 13, the uniaxial fiber fabric has a better flow guiding effect, which is beneficial to improving the pouring speed and the pouring effect.
In a third aspect, an embodiment of the present application provides a wind turbine generator, which includes the blade provided in any one of the above embodiments.
The wind turbine generator system provided by the embodiment of the application has the same technical effect due to the adoption of the blade provided by any one of the embodiments, and the description is omitted.
For better explanation of the beam 1, the blade and the wind turbine provided by the present application, as shown in fig. 6, in a fourth aspect, an embodiment of the present application provides a method for processing a blade, including the following steps:
laying a first skin fabric 31 on a mould of the blade shell;
sequentially placing the strip-shaped piece 11 and the interlayer fabric 12 on the first covering fabric 31, repeating the steps for multiple times, and placing the strip-shaped piece 11 at the top;
laying a fiber fabric on the uppermost strip-shaped member 11, wherein the fiber fabric extends from one side of the strip-shaped member 11 positioned in the thickness reducing area far away from the blade tip to the blade tip;
laying the core materials 2 on two sides of the strip-shaped pieces 11 in the width direction, wherein the core materials 2 and the strip-shaped pieces 11 are on the same layer;
laying down a second skin fabric 32, the second skin fabric 32 extending from the root to the tip of the blade;
and (6) pouring the adhesive 13 and completing curing to finish the manufacture of the wind power blade.
Note that the strip 11 and the interlayer fabric 12 may be directly laid on the first skin fabric 31.
In an embodiment, the strip-shaped member 11 and the interlayer fabric 12 stacked on the first covering fabric 31 are prefabricated members, that is, the strip-shaped member 11 and the interlayer fabric 12 are sequentially stacked to form a prefabricated member, and then the prefabricated member is laid on the first covering fabric 31, and the two embodiments have the same technical effect.
The interlayer fabric 12 may be formed by splicing a plurality of structures or may be an integrally formed structure. Illustratively, the interlaminar fabric 12 is of an integral structure, only a single layer of interlaminar fabric 12 is laid between the adjacent strips 11, and the interlaminar fabric 12 is free from wrinkles and breaks in the process of laying the interlaminar fabric 12, which is beneficial to improving the tensile strength of the beam 1.
It is understood that the first and second skin fabrics 31 and 32 are impregnated with the adhesive 13 after the adhesive 13 is poured, and the adhesive 13 is cured to be integrally formed with the shell body 4 together with the first and second skin fabrics 31 and 32 in the first and second skin fabrics 31 and 32.
The blade processing method provided by the embodiment of the application has the same technical effects due to the adoption of the blade provided by the embodiment, and the details are not repeated.
It will be appreciated that a filler may be filled between the core 2 and the strip 11 prior to pouring the adhesive 13. After auxiliary materials such as diversion and sealing are laid, preformed bodies such as the skin fabric 3, the beam 1, the core material 2 and the auxiliary materials can be sealed and vacuumized on a mould of the blade shell, and the subsequent pouring of the adhesive 13 is facilitated.
In addition, the term "and/or" herein is only one kind of association relationship describing an associated object, and means that there may be three kinds of relationships, for example, a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter associated objects are in an "or" relationship.
It should be understood that in the present embodiment, "B corresponding to a" means that B is associated with a, from which B can be determined. It should also be understood that determining B from a does not mean determining B from a alone, but may also be determined from a and/or other information.
While the invention has been described with reference to specific embodiments, the invention is not limited thereto, and various equivalent modifications and substitutions can be easily made by those skilled in the art within the technical scope of the invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (12)

1. A spar for a blade, comprising:
a bar extending in a longitudinal direction of the beam, and a plurality of the bar being stacked in a thickness direction of the beam;
an interlayer fabric extending in the longitudinal and width directions of the beam, the interlayer fabric being disposed between at least some of the strips;
an adhesive filled between adjacent said strips and between said interlay er fabric and said strips,
the weight of the interlayer fabric between every two adjacent strip-shaped pieces is A, and the weight of the corresponding adhesive is B; the fiber content in the strip-shaped piece is C, and C-A/(A + B) is more than or equal to 5 percent;
60％≤A/(A+B)≤66％；
the interlayer fabric between the adjacent strip-shaped pieces is a single-layer interlayer fabric or a multi-layer interlayer fabric.
2. The beam of claim 1 wherein the interlaminar fabric comprises fiberglass yarns having a linear density of 100 to 600tex.
3. The beam of claim 1 wherein the interlay er fabric includes fiber yarns arranged in two intersecting directions, the fiber yarns in the two directions each being layered; alternatively, the fiber yarns in both directions are interwoven as one layer.
4. The beam of claim 1 wherein the size of the interlaminar fabric is greater than the size of the strips in the width direction of the beam.
5. A blade, comprising:
the shell body is a hollow structure body;
a beam, according to any one of claims 1 to 4, connected to a wall of the shell body, the longitudinal direction of the beam extending in a direction from a blade root to a blade tip of the blade;
and a core material filled in the case body, the core material and the beam being connected by the adhesive.
6. The blade of claim 5, further comprising a filler body filled between the core material and the beam, the filler body and the core material being connected by the adhesive.
7. The blade of claim 6 wherein the filler is a bulked yarn, fiberglass, carbon fiber, or a jet-bonded cotton.
8. The blade according to claim 5, wherein the beam is formed with a tapered thickness region on a side thereof adjacent to the tip, and at least a portion of the strip has a thickness gradually decreasing from a side thereof remote from the tip to a side thereof adjacent to the tip.
9. The blade of claim 8 further comprising a fiber fabric laid on a side of the tapered thickness region proximate the shell body wall and extending to the tip.
10. Wind turbine comprising a blade according to any of claims 5 to 9.
11. A method of machining a blade, for machining a blade according to any of claims 5 to 9, comprising the steps of:
laying a first skin fabric on a mould of the blade shell;
placing the strip-shaped piece and the interlayer fabric on the first covering fabric in a stacking mode;
laying a fibrous web on the uppermost strip, said fibrous web extending from the strip in the region of the reduced thickness
A side of the member remote from said blade tip extending towards said blade tip;
laying the core material on two sides of the strip in the width direction;
laying a second covering fabric;
the adhesive is poured and curing is completed.
12. The method of manufacturing a blade according to claim 11, wherein the strip and the interlaminar fabric laminated on the first skin fabric are preforms.
CN202110362558.4A 2021-04-02 2021-04-02 Beam, blade machining method and wind turbine generator Active CN113123925B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110362558.4A CN113123925B (en) 2021-04-02 2021-04-02 Beam, blade machining method and wind turbine generator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110362558.4A CN113123925B (en) 2021-04-02 2021-04-02 Beam, blade machining method and wind turbine generator

Publications (2)

Publication Number Publication Date
CN113123925A CN113123925A (en) 2021-07-16
CN113123925B true CN113123925B (en) 2023-04-18

Family

ID=76774766

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110362558.4A Active CN113123925B (en) 2021-04-02 2021-04-02 Beam, blade machining method and wind turbine generator

Country Status (1)

Country Link
CN (1) CN113123925B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4194682A1 (en) * 2021-12-07 2023-06-14 LM Wind Power A/S Damage tolerant cover sheet for premanufactured spar cap

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002321215A (en) * 2001-04-25 2002-11-05 Toray Ind Inc Preform and molding thereof
CN101749194A (en) * 2009-12-11 2010-06-23 重庆通用工业(集团)有限责任公司 Wind turbine blade for large-scale wind generating set, and molding method thereof

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU760808B2 (en) * 1999-03-23 2003-05-22 Toray Industries, Inc. Composite reinforcing fiber base material, preform and production method for fiber reinforced plastic
CN101186707A (en) * 2007-11-15 2008-05-28 重庆长安汽车股份有限公司 Glass fiber multilayer fabric enhanced epoxy resin composite material for automobile
CN101293970B (en) * 2008-05-30 2010-07-21 威海光威复合材料有限公司 Preliminary dip material for wind-driven generator impeller vane
CN102762850B (en) * 2010-01-14 2015-04-08 耐普迪考股份有限公司 Wind turbine rotor blade components and methods of making same
CN102218828A (en) * 2011-05-27 2011-10-19 常州市宏发纵横新材料科技股份有限公司 Method for preparing continuous fiber multiaxial fabric reinforced thermoplastic composite material
US10179425B2 (en) * 2013-04-08 2019-01-15 Vestas Wind Systems A/S Fibre preform for laying on a curved surface of a mould
GB2528850A (en) * 2014-07-31 2016-02-10 Vestas Wind Sys As Improvements relating to reinforcing structures for wind turbine blades
EP3419816A1 (en) * 2016-02-23 2019-01-02 LM Wind Power International Technology II ApS Method of manufacturing a composite laminate structure
CN108869167B (en) * 2018-06-07 2020-05-05 武汉理工大学 Fan blade girder and manufacturing method thereof
CN109372708A (en) * 2018-10-12 2019-02-22 株洲时代新材料科技股份有限公司 A kind of wind electricity blade girder or auxiliary girder construction and its manufacturing method
CN212025543U (en) * 2019-12-18 2020-11-27 上纬新材料科技股份有限公司 Fluid perfusion promoting layer structure between plates and wind turbine blade
CN111169047A (en) * 2020-02-12 2020-05-19 连云港中复连众复合材料集团有限公司 Method for manufacturing main beam and auxiliary beam of wind power blade by mixing thick and narrow strip pultrusion profiles and glass fiber fabric

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002321215A (en) * 2001-04-25 2002-11-05 Toray Ind Inc Preform and molding thereof
CN101749194A (en) * 2009-12-11 2010-06-23 重庆通用工业(集团)有限责任公司 Wind turbine blade for large-scale wind generating set, and molding method thereof

Also Published As

Publication number Publication date
CN113123925A (en) 2021-07-16

Similar Documents

Publication Publication Date Title
EP2153964A1 (en) A method of manufacturing a wind turbine blade comprising steel wire reinforced matrix material
CN107073888B (en) The improvement of reinforcement structure about wind turbine blade
US7144625B2 (en) Wire reinforced thermoplastic coating
US9810198B2 (en) Wind turbine rotor blade components and methods of making same
US7758313B2 (en) Carbon-glass-hybrid spar for wind turbine rotorblades
US8840988B2 (en) Fiber preform made from reinforcing fiber bundles and comprising unidirectional fiber tapes, and composite component
CN109070498B (en) Method for manufacturing composite laminated structure
CN104487231B (en) Using the drawing core method of PMI foam cores
WO2005081995A2 (en) Wind blade spar cap and method of making
US20160273161A1 (en) Pre-impregnated composite material
EP2535171B1 (en) Method of manufacturing an oblong shell part and such shell part
EP3018293A1 (en) Composite article with fibre-reinforced sandwich core
CN113123925B (en) Beam, blade machining method and wind turbine generator
JP2016527112A (en) Composite form manufacturing method, composite form, sandwich component, rotor blade element, and wind power generator
JP6971100B2 (en) Fiber reinforced composite material
CN113119495A (en) Blade shell preparation method and blade
CN115485128A (en) Optimized spar cap structure for wind turbine blades
CN115485126A (en) Optimized interlayer for spar caps of wind turbine blades
WO2010034755A2 (en) Use of a composite article as spar component
CN116323160A (en) Method for manufacturing a wind turbine blade part with a flow reinforcing pad, flow reinforcing pad and spar cap obtained by said method
CN114616368A (en) Fiber fabric for blade perfusion and fan blade thereof
WO2003033246A1 (en) Twisted wire reinforced layer

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant