CN111022248B

CN111022248B - Prefabricated part of wind power blade root, blade root part, blade and manufacturing method thereof

Info

Publication number: CN111022248B
Application number: CN201911368379.0A
Authority: CN
Inventors: 唐金钱; 王向东; 张登刚; 鲁晓锋
Original assignee: Sinomatech Wind Power Blade Co Ltd
Current assignee: Sinomatech Wind Power Blade Co Ltd
Priority date: 2019-12-26
Filing date: 2019-12-26
Publication date: 2024-04-16
Anticipated expiration: 2039-12-26
Also published as: CN111022248A

Abstract

The invention provides a prefabricated part of a blade root of a wind power blade, a blade root part, the blade and a manufacturing method thereof, and a plurality of prefabricated parts of the blade roots of the wind power blades are manufactured; paving an outer layer fiber fabric in a blade root mould, placing a plurality of prefabricated members on the outer layer fiber fabric, and splicing adjacent prefabricated members; paving an inner layer fiber fabric on the spliced prefabricated member; and pouring into a blade root mould and forming the blade root. The method has the advantages that part of the layering is prefabricated in advance, and the layering is placed in a blade root die to be integrally formed together with the rest layering after assembly forming, so that difficulty and time in later-stage pouring forming can be reduced, a block overlapping mode is adopted in the thickness direction, multiple sections of prefabricated members are annularly spliced, and assembly difficulty can be greatly reduced. By adopting standardized and modularized production, the device can be manufactured in advance, is easy to check and control defects, reduces risks, can further improve production efficiency, can realize the universality of different models, and is convenient for standardized management.

Description

Prefabricated part of wind power blade root, blade root part, blade and manufacturing method thereof

Technical Field

The invention relates to the technical field of wind power generation devices, in particular to a prefabricated part of a blade root of a wind power blade, a blade root part, the blade and a manufacturing method of the prefabricated part.

Background

Wind power generation is one of the fastest growing resource utilization modes in the world today. Wind power blades are an important component of wind power generators, and development of wind power blades affects development of the whole industry. With the expansion of the offshore market and the design of longer blades, the load of the blade root becomes larger and larger, which has higher requirements for the production and processing of the root of the wind power blade. However, because the diameter of the blade root is continuously enlarged, the assembly of the embedded part of the blade root is time-consuming and labor-consuming, the operation of personnel is difficult, the existing semicircle height is even more than the personnel height, and the assembly and production difficulties are high.

The application number is CN201711013375.1, and it discloses a root structure of wind power blade and manufacturing method thereof, wind power blade, root structure of wind power blade includes body, a plurality of built-in fitting and amalgamation piece. The body is made of a fiber reinforced composite material. The embedded parts are arranged at intervals along the circumferential direction of the root structure. The spliced pieces are spliced with the embedded pieces and embedded in the body, the spliced pieces comprise a plurality of first spliced bodies and a plurality of second spliced bodies, the first spliced bodies and the embedded pieces are arranged at intervals, and the second spliced bodies are abutted against one end, facing the top of the wind power blade, of the embedded pieces in a one-to-one correspondence manner; concave parts are formed on two sides of each first splicing body, and any embedded part and the second splicing body abutted against the embedded part are matched and attached to the concave parts on two sides of the adjacent first splicing bodies.

Chinese patent application number CN201310064327.0 discloses a blade insert for connecting a first blade segment to a second blade segment. The blade insert may include a aerodynamic shell extending between a first end configured to be connected to the first blade segment and a second end configured to be connected to the second blade segment. The pneumatic housing may include a pressure side and a suction side extending between a leading edge and a trailing edge. Additionally, the aerodynamic shell may be provided with a chord, wherein the chord at the first end is substantially equal to the chord at the second end. The blade is designed into different independent parts, the independent parts are produced respectively, and finally the parts are spliced respectively, so that the blade is spliced into the whole blade, and finally the blade is welded or fused together through thermoplastic materials.

In the above two patent applications, although the scheme of separately producing and then assembling each part of the blade is proposed, when the production and processing of the root structure are aimed at, the multiple assembled parts and the embedded parts are still separately assembled in the assembling process, which results in more time consumption in the assembling process and low production efficiency.

Disclosure of Invention

The invention aims to provide a prefabricated part of a wind power blade root, a blade root part, a blade and a manufacturing method thereof, so as to solve the technical problem of high assembly and production difficulty of embedded parts in the prior art.

In order to achieve the above purpose, the invention adopts the following technical scheme: there is provided a wind power blade root preform comprising: the embedded part, the lower substrate, the upper substrate and the bonding layer are arranged in a manner that two adjacent side edges of the lower substrate are respectively arranged along a first direction and a second direction, the extending directions of a plurality of embedded parts are the second direction, the embedded parts are arranged on the lower substrate along the first direction, and a first groove for accommodating the embedded parts is formed on the lower substrate; the upper substrate is a sheet body and is covered on the embedded part; the bonding layer is filled between the lower layer substrate and the upper layer substrate and is annularly arranged on the outer edge of the embedded part.

Further, the length of the lower substrate in the first direction is greater than the length of the upper substrate in the first direction.

Further, a second groove for accommodating the embedded part is formed in the upper substrate, and the first groove and the second groove are oppositely arranged.

Further, the first groove and the second groove enclose to form a circle or an ellipse.

Further, the embedded part is a bolt sleeve, and the length of the upper substrate in the first direction is greater than the length of the embedded part in the first direction.

Further, the lower substrate is further provided with a plurality of filling pieces, and the filling pieces are spliced with the embedded pieces and are embedded in the first groove together.

Further, the filling piece comprises a filling rod spliced with the embedded piece and filling tabs arranged on two opposite sides of the filling rod, and the adjacent filling tabs of the filling piece are abutted.

Further, the lower substrate comprises a first portion for accommodating the embedded part and a second portion for accommodating the filling part, and the first portion and the second portion have different thicknesses.

Further, one end of the lower substrate far away from the embedded part is provided with an inclined guide surface, and the thickness of one side of the lower substrate far away from the embedded part is smaller than that of one side of the lower substrate near the embedded part; the thickness of the filling piece is thinned at one end facing away from the embedded piece.

Further, one end of the upper substrate far away from the embedded part is provided with an inclined surface extending to the filling part.

The invention also discloses a blade root part, which comprises an outer layer fiber fabric, an inner layer fiber fabric and a plurality of mutually spliced prefabricated parts of the wind power blade root, wherein the outer layer fiber fabric and the inner layer fiber fabric are respectively coated on two opposite sides of the prefabricated parts.

The invention also discloses a wind power blade, which comprises a blade tip part, a blade body part and a blade root part, wherein the blade root part comprises the prefabricated part.

The invention also discloses a blade root or blade manufacturing method, which comprises the following steps:

manufacturing a plurality of prefabricated parts of the blade root of the wind power blade;

paving an outer layer fiber fabric in a blade root mould or a blade mould, placing a plurality of prefabricated members on the outer layer fiber fabric, and splicing adjacent prefabricated members;

paving an inner layer fiber fabric on the spliced prefabricated member;

and pouring and forming the blade root or the blade in the blade root mould or the blade mould.

Further, the splicing mode between the prefabricated members can be aligned splicing or misplacement splicing.

The prefabricated part, the blade root part and the blade of the wind power blade root and the manufacturing method of the wind power blade root provided by the invention have the beneficial effects that: compared with the prior art, the method has the advantages that part of the layering is prefabricated in advance, and the layering is placed in the blade root die to be integrally formed together with the rest layering after assembly forming, so that the difficulty and time in later-stage pouring forming can be reduced, a block and superposition mode is adopted in the thickness direction, multiple-section prefabricated members are annularly spliced, and the assembly difficulty can be greatly reduced. Meanwhile, the prefabricated member can be produced in standardized and modularized mode, can be manufactured in advance, is easy to check and control defects, reduces risks, can further improve production efficiency, can realize universality of different models, and is convenient for standardized management.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a mold processing structure of a preform manufacturing method according to an embodiment of the present invention;

fig. 2 is a schematic perspective view of a prefabricated member produced by a production method of a wind power blade root prefabricated member according to an embodiment of the present invention;

FIG. 3 is a schematic view of another angular perspective of the preform shown in FIG. 2, wherein the upper matrix is not shown;

FIG. 4 is a schematic diagram of a front view of the preform shown in FIG. 2, in which the preform is spliced in alignment;

FIG. 5 is a schematic diagram of a front view of the preform shown in FIG. 2, in which the preform is spliced in a staggered manner;

FIG. 6 is a schematic view of an extrusion structure of an upper substrate and a lower substrate of a preform manufacturing method according to an embodiment of the present invention;

FIG. 7 is a schematic diagram of a three-dimensional structure of a mold used in an embodiment of the present invention;

fig. 8 is a schematic view of a blade root component according to an embodiment of the present invention.

Reference numerals illustrate:

1. an embedded part; 2. a lower layer substrate; 3. an upper layer substrate; 4. an adhesive layer; 5. filling member

The method comprises the steps of carrying out a first treatment on the surface of the 6. A mold; 7. an outer layer of fibrous fabric; 8. an inner layer fiber fabric; 21. a first groove; 22. an inclined guide surface; 23. a second fixed cross section; 24. a base line; 31. a second groove; 32. an inclined surface; 33. a first fixed cross section; 34. a base line; 51. a filler rod; 52. filling the overlapping lugs; 61. an upper die; 62. a lower die; 611. a fourth groove; 621. a third groove; 6111. a first groove section; 6112. a second groove segment.

Detailed Description

The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

In addition, the technical features of the different embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.

Example 1

Referring to fig. 1 to 5, a method for producing a prefabricated wind power blade root provided by the invention will now be described. The production method of the wind power blade root prefabricated member comprises the following steps:

s1, preforming an upper substrate 3 and a lower substrate 2, wherein the upper substrate 3 and the lower substrate 2 are both made of a sheet material, and a plurality of first grooves 21 are formed in the lower substrate 2;

s2, placing the lower substrate 2 in a die 6, placing a plurality of embedded parts 1 in the first grooves 21, buckling the upper substrate 3 on the embedded parts 1, and oppositely arranging the first grooves 21 and the second grooves 31 and surrounding the outer sides of the embedded parts 1;

s3, respectively coating adhesives on the lower substrate 2 and the upper substrate 3, bonding with the embedded part 1, and bonding the upper substrate 3, the embedded part 1 and the lower substrate 2 into a combined part; the coating time of the adhesive can be that a layer of adhesive is coated on the lower substrate 2 before the embedded part 1 is arranged on the lower substrate 2, and the adhesive is coated on the embedded part 1 or at the bottom of the upper substrate 3 when the upper substrate 3 is buckled on the embedded part 1.

S4, solidifying and forming the assembled assembly in a mould 6, and manufacturing a formed prefabricated member.

Compared with the prior art, the production method of the wind power blade root prefabricated part provided by the invention has the advantages that the upper substrate 3 and the lower substrate 2 are prefabricated and molded in advance, then the upper substrate 3, the lower substrate 2 and the embedded part 1 are arranged in the die 6 for assembly and molding, and then the integrated heat curing is carried out uniformly, so that the integrated pouring during the later processing is not needed, the pouring quality is higher, the difficulty and time during the later pouring and molding can be reduced, the defect rate can be reduced, and the integrated height consistency can be ensured. The upper substrate 3 and the lower substrate 2 can be preformed respectively, so that the time can be saved greatly, the production efficiency is improved, the processed prefabricated parts can be stored and assembled in a segmented mode, the segmented and overlapped mode is adopted in the thickness direction, the multi-section prefabricated parts are spliced in the annular direction, and the assembly difficulty can be greatly reduced. Meanwhile, the prefabricated member can be produced in standardized and modularized mode, can be manufactured in advance, is easy to check and control defects, reduces risks, can further improve production efficiency, can realize universality of different models, and is convenient for standardized management. At this time, the upper substrate 3 and the lower substrate 2 are both formed by pre-processing, the adhesive layer 4 is a later filler for realizing the fixed connection among the upper substrate 3, the embedded part 1 and the lower substrate 2, the production mode is simple, the production and the manufacturing can be performed in advance, the single volume is smaller, the size of the prefabricated whole prefabricated member can be adjusted according to the requirement, and the defect reduction risk can be easily checked and controlled.

The structure of the prefabricated part produced by adopting the prefabricated part production method is as follows: the prefabricated part comprises an embedded part 1, a lower substrate 2, an upper substrate 3 and an adhesive layer 4, wherein the lower substrate 2 is a sheet, two adjacent side edges of the lower substrate 2 are respectively arranged along a first direction and a second direction, the extending directions of a plurality of embedded parts 1 are the second direction, the embedded parts 1 are arranged on the lower substrate 2 along the first direction, and a first groove 21 clamped on the outer edge of the embedded parts 1 is formed on the lower substrate 2; the upper substrate 3 is a sheet body, and the upper substrate 3 is covered on the embedded part 1; the bonding layer 4 is filled between the lower substrate 2 and the upper substrate 3 and is annularly arranged on the outer edge of the embedded part 1.

The embedded part 1 can be a nut, a bolt limiting part, a foam filling part, a wooden object, a spacing part, a three-dimensional fiber structure and other parts which need to be embedded along with the blade root forming. It will be appreciated that the embedded part 1 is a preformed part prior to assembly, and at the same time, for ease of assembly, the surface of the part is treated correspondingly, for example, by winding fibres or yarns, attaching a peelable layer, surfacing, applying a resin or an adhesive, to improve the interfacial bonding strength. Specifically, the embedded part 1 refers to a bolt structure which is arranged at intervals along the circumferential direction of the blade root and is used for connecting the blade with the hub of the wind driven generator through bolts. The first direction and the second direction are two mutually perpendicular directions on the horizontal plane, and the arrangement extending direction of the embedded parts 1 is perpendicular to the length extending direction of the first grooves 21, namely, a plurality of embedded parts 1 are uniformly arranged on the lower-layer base body 2 at intervals.

The upper substrate 3 may be formed with a second groove 31 engaged with an outer edge of the embedded part 1, where the first groove 21 and the second groove 31 are oppositely disposed. The first grooves 21 are uniformly arranged along the first direction of the lower substrate 2, and the length direction of the first grooves 21 is consistent with the length direction of the lower substrate 2 and is the second direction; the second grooves 31 are also uniformly arranged along the first direction of the upper substrate 3, and the first grooves 21 and the second grooves 31 are oppositely arranged and are enclosed into a through hole, and the embedded part 1 is embedded in the through hole. The first grooves 21 and the second grooves 31 may be formed by bending a sheet of the lower substrate 2 or a sheet of the upper substrate 3, or may be formed by directly forming grooves in a sheet of the lower substrate 2 or a sheet of the upper substrate 3. Of course, according to practical situations and specific requirements, in other embodiments of the present invention, the upper substrate 3 may also be directly fastened to the embedded part 1, and the second groove 31 is not formed on the upper substrate 3, where the shape of the embedded part 1 may be semicircular or square, and the present invention is not limited only.

Specifically, the embedded parts 1 are bolt structures which are arranged at intervals along the circumferential direction of the blade root and are used for realizing fixed connection with the blade, the cross section of each embedded part 1 is generally a cylindrical ring body, standard parts are adopted for direct processing, and embedded parts 1 with flat cylinders, square bodies or other polygons in cross section can also be adopted; the adhesive may be not limited in material, and may be adhesive glue, resin, prepreg fiber, or other materials capable of integrating a plurality of sub-components, such as epoxy adhesive.

The upper matrix 3 and/or the lower matrix 2 are preformed reinforcing fiber parts, manufactured by impregnating fibers into a resin and curing the same, for example, by a prepreg process, a pultrusion process, or a continuous molding process. Wherein the fiber mainly adopts one or a combination of glass fiber, carbon fiber, natural fiber, polyester fiber, polyamide fiber and the like, and the resin can adopt any thermosetting resin or thermoplastic resin such as epoxy resin, phenolic resin, unsaturated polyester, thermosetting resin, polyolefin, polyester resin, polyamide resin and the like. Preferably, the upper substrate 3 and the lower substrate 2 are preformed sheet bodies respectively covered on the upper side and the lower side of the embedded part 1, the materials are preferably multiaxial fibers and thermosetting resin, and the surfaces of the upper substrate 3 and the lower substrate 2 need to be paved with release cloths or other modes for roughening the surfaces to ensure roughness, such as sand blasting, sand sanding, grinding, corona treatment, plasma treatment and the like.

Preferably, the cross section of the embedded part 1 is circular or elliptical, and the first groove 21 and the second groove 31 enclose to form a circle or ellipse. Specifically, the cross section of the embedded part 1 is generally circular or elliptical, that is, the embedded part 1 is a circular cylinder, the inner surface of the embedded part 1 is provided with internal threads, and the bolt can be inserted into the through hole in the embedded part 1, so that the connection of the bolt is realized. The first groove 21 and the second groove 31 are oppositely arranged, namely, the two first grooves 21 and the second grooves 31 for encircling the embedded part 1 are oppositely arranged, and two side edges of the first groove 21 and the second grooves 31 can be connected, so that the first groove 21 and the second grooves 31 are spliced into a circle. The diameter of the circular inner circle formed by the first groove 21 and the second groove 31 is slightly larger than or equal to the diameter of the outer circle of the embedded part 1, so that the fixing stability of the embedded part 1 is ensured. The number of the first grooves 21 and the second grooves 31 may be equal or unequal, and the upper substrate 3 and the lower substrate 2 may be offset, for example, such that the first grooves 21 of the upper substrate 3 and the second grooves 31 of the lower substrate 2 are disposed opposite to each other. Of course, according to practical situations and specific requirements, in other embodiments of the present invention, the cross section of the embedded part 1 is square, and the first groove 21 and the second groove 31 are spliced to form a square, which is not limited only herein.

Further, referring to fig. 6, as a specific embodiment of the method for producing a wind turbine blade root preform according to the present invention, the upper substrate 3 and the lower substrate 2 are both formed by pultrusion, or only one of the upper substrate 3 or the lower substrate 2 is formed by pultrusion. Specifically, the pultrusion is a process method for producing a composite material section by impregnating continuous fibers or fabrics thereof with resin under the traction of a traction device and heating the resin by a forming die, and the specific processing technology is a conventional technology in the prior art. The materials of the upper substrate 3 and the lower substrate 2 are generally multiaxial fibers and thermosetting resin, which can be formed by adopting a pultrusion mode, and can be directly formed without cutting, so that more materials can be saved. Of course, according to practical situations and specific requirements, in other embodiments of the present invention, the upper substrate 3 and/or the lower substrate 2 may be formed by vacuum infusion molding or other manners, which are not limited herein.

Further, referring to fig. 2, 3 and 6, as a specific embodiment of the method for producing a wind turbine blade root preform provided by the present invention, the upper substrate 3 has a first fixed section 33, and the upper substrate 3 is pultruded from the first fixed section 33 along a baseline 34; the lower substrate 2 has a second fixed cross section 23, and the lower substrate 2 is pultruded from the second fixed cross section 23 along the base line 24. Specifically, the base strings 24 and 34 are disposed perpendicular to the first and second fixed sections 33 and 23, and the first and second fixed sections 33 and 23 may be pultruded along the extending direction of the base strings 24 and 34. The direction of the pultrusion may be either the first direction or the second direction, and only the shapes of the upper substrate 3 and the lower substrate 2 need to be formed.

Preferably, referring to fig. 2, 3 and 6, as a specific embodiment of the method for producing a wind turbine blade root preform according to the present invention, the length direction of the first fixing section 33 and the second fixing section 23 is consistent with the length direction of the first groove 21, and the base lines 24 and 34 are perpendicular to the first fixing section 33 and the second fixing section 23. That is, at this time, the longitudinal direction of the first fixing section 33 and the second fixing section 23 is the second direction, and then the extending direction of the base line is the first direction, and at this time, the shape of the first fixing section 33 may coincide with the longitudinal section shape of the upper substrate 3 in the second direction, and the shape of the second fixing section 23 may coincide with the longitudinal section shape of the lower substrate 2 in the second direction, so that the drawing molding may be performed once. The shapes of the base lines 24 and 34 are formed by sequentially splicing a plurality of semicircles, the connection parts between the semicircles are provided with transition circular arcs, the first fixing section 33 and the second fixing section 23 can form a plate body with a plurality of grooves along the base lines 24 and 34, the semicircles of the base lines 24 and 34 are the first grooves 21 and the second grooves 31 in the application, the number of the semicircles is the same as that of the first grooves 21, the second grooves 31 and the embedded parts 1, and the embedded parts 1 can be embedded in the first grooves 21 and the second grooves 31.

Of course, in other embodiments of the present invention, the extending direction of the first fixing section 33 and the second fixing section 23 may also be along the second direction, the base line 34 or 24 may extend along the first direction, and the shapes of the first fixing section 33 and the second fixing section 23 may be a plurality of semicircles spliced in turn, where the lower substrate 2 having the first groove 21 and the upper substrate 3 having the second groove 31 may also be stretched, and the first substrate and the second substrate may be further processed by cutting or grinding, etc., which is not limited herein.

Further, referring to fig. 2, 3 and 6, as a specific embodiment of the method for producing a wind turbine blade root preform according to the present invention, the first fixing section 33 and the second fixing section 23 are both trapezoidal, one side of the first fixing section 33 and one side of the second fixing section 23 are perpendicular to the bottom edge, the other side is inclined to the bottom edge, and the length of the bottom edge is greater than the length of the top edge. Specifically, the first fixing section 33 and the second fixing section 23 are both right trapezoid, and one side of the first fixing section 33 and one side of the second fixing section 23, which are close to the embedded part 1, are of right-angle structures, and one side of the second fixing section, which is far away from the embedded part 1, is obliquely arranged. Namely, the inclined guide surface 22 is formed on one side surface of the lower substrate 2 far away from the embedded part 1, and the inclined guide surface 22 is a slope for transition, so that the phenomenon that stress concentration occurs when one end of the lower substrate 2 far away from the embedded part 1 is connected with other parts of the blade can be avoided, and the end part of the lower substrate 2 is prevented from being damaged.

Further, referring to fig. 2, 3 and 6, as a specific embodiment of the method for producing a wind turbine blade root preform according to the present invention, the length of the first fixing section 33 is smaller than the length of the second fixing section 23. Specifically, the lengths of the first fixing section 33 and the second fixing section 23 are equal to the lengths of the upper substrate 3 and the lower substrate 2 in the second direction, that is, the length of the lower substrate 2 in the second direction is greater than the length of the upper substrate 3 in the second direction, the length of the upper substrate 3 in the second direction is greater than the length of the embedded part 1 in the second direction, the length of the lower substrate 2 is longer than the length of the upper substrate 3, the upper substrate 3 can completely cover the embedded part 1, and a stable and complete filling effect can be achieved during later injection molding filling. The length of the lower substrate 2 is longer, so that the connection with the blade can be realized conveniently, the area of the connection surface between the blade root and the blade is enlarged, and the better connection effect is achieved. The lengths of the embedded part 1 and the upper substrate 3 are shorter, so that the embedded part 1 and the upper substrate 3 are arranged at one end of the lower substrate 2. Preferably, the thickness of the upper substrate 3 is identical to the thickness of the lower substrate 2.

Further, referring to fig. 3, as a specific embodiment of the method for producing a wind power blade root preform provided by the present invention, the method further includes the following steps:

s3.1, after the embedded part 1 is placed in the first groove 21, a filling part 5 is arranged on one side of the embedded part 1, and the filling part 5 and the embedded part 1 are spliced and jointly embedded in the first groove 21. Specifically, the material of the filling member 5 is generally foam or other materials with lighter texture and capable of realizing filling, and the filling member 5 is also disposed in the first groove 21, and the filling member 5 includes a filling rod 51 spliced with the embedded member 1, and filling tabs 52 disposed on two opposite sides of the filling rod 51, and the filling tabs 52 of adjacent filling members 5 are abutted against each other. The thickness of the filling rod 51 is consistent with the thickness of the embedded part 1, or the thickness of the filling rod 51 is larger than the thickness of the embedded part 1. The filling rod 51 is arranged at one end part of the embedded part 1, and the filling lugs 52 are arranged at two opposite sides of the filling rod 51, so that the filling rod 51 can be prevented from rotating, and the positioning effect can be achieved. The filling tab 52 is a protruding block protruding from two ends of the filling rod 51, two side ends of the first groove 21 and two side ends of the second groove 31 can be abutted against the filling tab 52, and the position between the first groove 21 and the second groove 31 can be supported. It will be appreciated that the filler element 5 may also comprise spacers extending between adjacent embedments 1, such as glass fibre reinforced plastic, foam spacers, etc. preformed to match the shape of the embedments.

Wherein the sum of the length of the filling member 5 and the length of the embedded member 1 is smaller than the length of the first groove 21. Specifically, the embedded part 1 is arranged at one end of the first groove 21, and the filling part 5 is closely attached to the end of the embedded part 1 and extends to the other end of the first groove 21, so that the effects of filling and supporting are achieved. The length of the first groove 21 is slightly greater than the total length of the filling member 5 and the embedded member 1, so that a good coating effect can be ensured.

Because the end of the lower substrate 2 far away from the embedded part 1 is provided with the inclined guide surface 22, the thickness of the filling part 5 is thinned at the end facing away from the embedded part 1, namely, the thickness of the filling part 5 is thinned at the end facing away from the embedded part 1. The filler 5 is also formed with an inclined surface 32 at the end portion, thereby having an effect of supporting the auxiliary filling support. The structure of the entire filling member 5 is gradually inclined, that is, the thinner the filling member 5 is toward one side of the inclined guide surface 22, the more convenient the disassembly and assembly between the entire prefabricated member and the blade mold can be made, and the damage caused by stress concentration can be avoided.

The tail end of the upper substrate 3 is also provided with an inclined surface 32, the inclined surface 32 is used for realizing complete cladding of the embedded part 1, one end of the inclined surface 32 is positioned on the embedded part 1, the other end of the inclined surface extends to the filling part 5, and the connecting part between the embedded part 1 and the filling part 5 can be shielded, so that the connecting stability between the embedded part 1 and the filling part 5 is ensured.

In order to make the weight of the whole prefabricated member lighter, the upper layer matrix 3 and the lower layer matrix 2 generally adopt a material with stronger strength such as a limit composite reinforcing material, but the weight of the material is heavier, the filling member 5 generally adopts a material with lighter weight such as foam, so that the volume of the filling member 5 needs to be increased to reduce the volumes of the upper layer matrix 3 and the lower layer matrix 2, the cross section size of the filling member 5 can be larger than the very cross section size of the embedded member 1, so that the filling member 5 and the embedded member 1 are matched in different sizes, and the outer edges of the whole upper layer matrix 3 and the lower layer matrix 2 are in smooth and uniform transition, so that the corresponding thicknesses of the upper layer matrix 3 and the lower layer matrix 2 can be different, namely the thickness of the filling member can be divided into a first part matched with the embedded member 1, and the thickness of the filling member 5 is thicker; and may also comprise a second portion matching the filler 5, which is thinner. Of course, the thicknesses of the first portion and the second portion may also be uniform, and are not limited solely herein, according to actual circumstances and specific requirements.

In order to further reduce the weight of the entire preform, filling extensions (not shown) may also be provided between adjacent embedments 1, either alone or in the form of extensions of filling elements 5. Because the upper substrate 3 and the lower substrate 2 are heavy in material weight, and because the upper substrate 3 and the lower substrate 2 between two adjacent embedded parts 1 may have a gap due to processing precision and other reasons, the gap needs to be filled when being poured or bonded at a later stage, but the weight of the filler is lovely, the weight of the whole prefabricated part can be reduced by adopting a filling extension part with lighter weight, the material of the filling extension part is the same as that of the filling part 5, and foam or other materials with lighter texture and filling can be adopted.

Example 2

The invention also provides another wind power blade root prefabricated part production method, which is different from the embodiment 1 in that: in the step S3, the lower substrate 2, the embedded part 1 and the upper substrate 3 are stacked in advance, and then an adhesive is filled between the upper substrate 3 and the lower substrate 2, so that the upper substrate 3, the embedded part 1 and the lower substrate 2 can be bonded. Compared with the mode of applying the adhesive for a plurality of times in the embodiment 1, the operation is simpler.

Example 3

Referring to fig. 1 and 7, the present invention further provides a mold 6 applied in a method for producing a wind turbine blade root preform, where the mold 6 includes a lower mold 62 for accommodating the lower substrate 2 and an upper mold 61 for accommodating the upper substrate 3, a plurality of third grooves 621 attached to the lower surface of the lower substrate 2 are formed in the lower mold 62, a plurality of fourth grooves 611 attached to the upper surface of the upper mold 61 are formed in the upper mold 61, and an embedded part 1 is coated between the upper substrate 3 and the lower substrate 2. The mould 6 provided by the invention can be used for placing the whole prefabricated part into the mould 6 for production and processing, and the height of the whole prefabricated part can be uniformly controlled through the standardized mould 6, so that the processing standardization and uniformity are ensured. By performing the advanced hot pressing through the die 6, the production efficiency can be improved on the basis of not occupying the blade die.

Wherein, the lower mold 62 and the upper mold 61 are disposed opposite to each other, the third groove 621 and the fourth groove 611 are disposed opposite to each other, and the lower mold 62 is engaged with the lower surface of the lower substrate 2, and since the lower surface of the lower substrate 2 also has a plurality of protruding portions that are engaged with the first groove 21, the lower mold 62 is provided with a plurality of third grooves 621 that are engaged with the protruding portions; the upper mold 61 is engaged with the upper surface of the upper substrate 3, and since the upper surface of the upper substrate 3 also has a plurality of protrusions matching with the second grooves 31, the upper mold 61 is provided with a plurality of fourth grooves 611 matching with the protrusions. At this time, the third grooves 621 and the fourth grooves 611 are also provided in one-to-one correspondence.

The upper mold 61 and the lower mold 62 may be opened and closed, and preferably, the upper mold 61 is hinged to the lower mold 62. The upper die 61 and the lower die 62 can be two relatively independent dies, the upper die 61 and the lower die 62 can be combined together, namely the lower die 62 can be kept motionless, then the upper die 61 can be movably buckled on the lower die 62, wherein the upper die 61 and the lower die 62 can be connected in a rotating way, can be clamped and the like; alternatively, the upper mold 61 may be kept stationary, and the lower mold 62 may be movably engaged with the upper mold 61, which is not limited only.

Wherein the third groove 621 comprises a first groove segment 6111 engaged with the upper substrate 3 and a second groove segment 6112 engaged with the filler 5, an inclined surface 32 is formed at the joint of the first groove segment 6111 and the second groove segment 6112, the inclined surface 32 is used for being attached to the inclined surface 32 at the tail end of the upper substrate 3,

since the length of the upper substrate 3 is smaller than the length of the lower substrate 2, the latter half of the lower substrate 2 is abutted against the upper die 61 by the packing 5, and the packing 5 is also formed with the inclined guide surface 22 in correspondence with the start position and the curvature of the inclined guide surface 22 at the position opposed to the inclined guide surface 22, i.e., the inclined convex surface of the third groove 621 is opposed to the inclined guide surface 22, i.e., the start position and the curvature of the inclined guide surface 22 and the like are in correspondence with the inclined guide surface 22 of the lower substrate 2. The fit between the upper mold 61 and the entire preform can be better achieved at this time.

In which the mould 6 is provided with other auxiliary pouring means, such as heating elements and control elements, vacuum pouring may be required if the adhesive is a resin, and thus the mould 6 is provided with the necessary equipment such as vacuum ports and vacuum gauges connected to a vacuum machine.

Example 4

The invention also provides a blade root part, which comprises an outer layer fiber fabric 7, an inner layer fiber fabric 8 and a plurality of mutually spliced prefabricated parts of the blade root of the wind power blade, which are described in the embodiment 1 or the embodiment 2, wherein the outer layer fiber fabric 7 and the inner layer fiber fabric 8 are respectively coated on two opposite sides of the prefabricated parts. The number of the prefabricated members can be multiple, the prefabricated members can be spliced between the outer layer fiber fabric 7 and the inner layer fiber fabric 8, and the splicing method can be aligned splicing or misplaced splicing.

Example 5

Referring to fig. 8, the present invention further provides a method for manufacturing a blade root, which includes the following steps:

s5, manufacturing a plurality of prefabricated parts of the wind power blade root according to any embodiment by adopting the steps from S1 to S4;

s6, paving an outer layer fiber fabric 7 in a blade root mould, and splicing a plurality of prefabricated members in sequence; wherein, the structure and the using method of the blade root mould are that in the prior art, the outer layer fiber fabric 7 is paved in the blade root mould, and the outer layer fiber fabric 7 is generally an external protective layer, and then the prefabricated member is placed on the outer layer fiber fabric 7;

when the prefabricated members are assembled, all the prefabricated members can be sequentially fixed on a flange plate (not shown) on the ground, and then the whole assembled prefabricated members are uniformly hoisted to the outer-layer fiber fabric 7; the assembled prefabricated member may be set directly onto the outer layer fiber fabric 7, and the prefabricated member may be assembled onto the outer layer fiber fabric 7 and fixed onto the flange.

S7, paving an inner layer fiber fabric 8 on the spliced prefabricated member; the inner layer fiber fabric 8 is laid on the inner surface of the prefabricated member, which can protect the inner surface of the prefabricated member, and the combination of the inner layer fiber fabric 8 and the outer layer fiber fabric 7 can also ensure the injection molding effect.

S8, pouring and forming a blade root in the blade root mould; the pouring molding mode is the prior art, and the inner layer fiber fabric 8, the outer layer fiber fabric 7 and the prefabricated member can form an integrated structure, so that the connecting effect of the inner layer fiber fabric and the outer layer fiber fabric is ensured.

The method has the advantages that the partial paving layers are prefabricated in advance, and then are placed into the blade mould to be integrally formed together with the rest paving layers after assembly forming, so that the difficulty and time in later-stage pouring forming can be reduced, a block overlapping mode is adopted in the thickness direction, multiple sections of prefabricated members are annularly spliced, and the assembly difficulty can be greatly reduced. Meanwhile, the prefabricated member can be produced in standardized and modularized mode, can be manufactured in advance, is easy to check and control defects, reduces risks, can further improve production efficiency, can realize universality of different models, and is convenient for standardized management.

The manufactured and molded blade root part can be directly spliced with the blade tip part and the blade body part at a later stage or is subjected to pouring molding again after being spliced, so that the complete blade is formed. The blade root is preformed, so that later assembly and forming can be facilitated.

Further, referring to fig. 3 and fig. 4, as a specific embodiment of the method for manufacturing a blade provided by the present invention, the splicing manner between the prefabricated members may be aligned splicing or offset splicing. Specifically, when the prefabricated members are assembled, the assembly can be aligned and assembled, namely, the tail end of the previous prefabricated member and the head end of the next prefabricated member are directly aligned and spliced, and the assembly mode is simple at this time; the staggered splicing means that a section of upper substrate 3 or lower substrate 2 is reserved at the tail end of the previous prefabricated member, a part of unsealed area exists on the latter prefabricated member, and the reserved upper substrate 3 or lower substrate 2 can be connected with the reserved unsealed area, but the operation is more complex. Of course, according to actual situations and specific requirements, in other embodiments of the present invention, other splicing manners may be used, which is not limited only herein.

Example 6

The invention also provides a wind power blade, and the wind power blade comprises a blade tip portion, a blade body portion and a blade root portion, wherein the blade root portion comprises the prefabricated member disclosed in embodiment 3.

Example 7

Referring to fig. 8, the present invention also provides a blade manufacturing method, which is different from the blade root manufacturing method in embodiment 5 in that: directly laying an outer layer fiber fabric 7 in a blade mould, then splicing a plurality of prefabricated parts in sequence, and laying an inner layer fiber fabric 8 on the spliced prefabricated parts; and setting the relevant parts of the blade tip part and the blade body part in a blade mould, and pouring and forming the blade in the blade mould.

At the moment, the process of filling can be saved by directly producing and processing on the blade mould, and the connection tightness among the blade root part, the blade tip part and the blade body part is ensured.

It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the invention.

Claims

1. Prefabricated member of wind-powered electricity generation blade root, its characterized in that includes:

an embedded part (1);

the lower-layer base body (2) is a sheet body, two adjacent side edges of the sheet body are respectively arranged along a first direction and a second direction, the extending direction of a plurality of embedded parts (1) is the second direction, the embedded parts (1) are arranged on the lower-layer base body (2) along the first direction, and a first groove (21) for accommodating the embedded parts (1) is formed in the lower-layer base body (2);

the upper substrate (3) is a sheet body, the upper substrate (3) is covered on the embedded part (1), the length of the lower substrate (2) in the first direction is larger than the length of the upper substrate (3) in the first direction, a second groove (31) for accommodating the embedded part (1) is formed in the upper substrate (3), and the first groove (21) and the second groove (31) are oppositely arranged;

the lower substrate (2) is further provided with a plurality of filling pieces (5), the filling pieces (5) are spliced with the embedded pieces (1) and are jointly embedded in the first grooves (21), one end, far away from the embedded pieces (1), of the upper substrate (3) is provided with an inclined surface (32) extending to the filling pieces (5), the filling pieces (5) comprise filling rods (51) spliced with the embedded pieces (1) and filling tabs (52) arranged on two opposite sides of the filling rods (51), the filling tabs (52) are protruded out of the filling rods (51), and two side ends of the first grooves (21) and two side ends of the second grooves (31) are abutted against the filling tabs (52);

and the bonding layer (4) is filled between the lower substrate (2) and the upper substrate (3) and is annularly arranged at the outer edge of the embedded part (1).

2. A preform for a wind blade root according to claim 1, wherein: the first groove (21) and the second groove (31) are enclosed to form a round shape or an oval shape.

3. Preform for a wind blade root according to any of the claims 1 to 2, wherein: the embedded part (1) is a bolt sleeve, and the length of the upper substrate (3) in the first direction is greater than that of the embedded part (1) in the first direction.

4. A preform for a wind blade root according to claim 1, wherein: the filling lugs (52) of adjacent filling members (5) are abutted.

5. A preform for a wind blade root according to claim 1, wherein: the lower substrate (2) comprises a first part for accommodating the embedded part (1) and a second part for accommodating the filling part (5), wherein the first part and the second part have different thicknesses.

6. A preform for a wind blade root according to claim 1, wherein: one end of the lower layer base body (2) far away from the embedded part (1) is provided with an inclined guide surface (22), and the thickness of one side of the lower layer base body (2) far away from the embedded part (1) is smaller than that of one side of the lower layer base body (2) close to the embedded part (1); the thickness of the filling piece (5) is thinned at one end facing away from the embedded piece (1).

7. A root component, characterized by: preform comprising an outer layer of fibre fabric (6), an inner layer of fibre fabric (7) and a number of mutually spliced wind blade roots according to any of claims 1 to 6, said outer layer of fibre fabric (7) and said inner layer of fibre fabric (8) being coated on opposite sides of said preform, respectively.

8. Wind-powered electricity generation blade, its characterized in that: comprising a blade tip portion, a blade body portion and a blade root portion, said blade root portion comprising a preform according to any of claims 1 to 6.

9. A method of manufacturing a blade root or blade, comprising the steps of:

manufacturing a number of prefabricated parts of the blade root of the wind power blade according to any one of claims 1 to 6;

laying an outer layer fiber fabric (7) in a blade root mould or a blade mould, placing a plurality of prefabricated parts on the outer layer fiber fabric (7), and splicing adjacent prefabricated parts;

paving an inner layer fiber fabric (8) on the spliced prefabricated member;

10. A method of manufacturing a blade root or blade according to claim 9, wherein: the splicing mode between the prefabricated members can be alignment splicing or dislocation splicing.