CN116394539A - Method for manufacturing prefabricated blade root - Google Patents
Method for manufacturing prefabricated blade root Download PDFInfo
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- CN116394539A CN116394539A CN202310263511.1A CN202310263511A CN116394539A CN 116394539 A CN116394539 A CN 116394539A CN 202310263511 A CN202310263511 A CN 202310263511A CN 116394539 A CN116394539 A CN 116394539A
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 52
- 238000000034 method Methods 0.000 title claims description 42
- 239000000835 fiber Substances 0.000 claims abstract description 179
- 238000004804 winding Methods 0.000 claims abstract description 62
- 229920005989 resin Polymers 0.000 claims abstract description 25
- 239000011347 resin Substances 0.000 claims abstract description 25
- 239000010410 layer Substances 0.000 claims description 114
- 238000005490 dry winding Methods 0.000 claims description 9
- 230000002093 peripheral effect Effects 0.000 claims description 9
- 239000011241 protective layer Substances 0.000 claims description 4
- 238000004046 wet winding Methods 0.000 claims description 4
- 230000007547 defect Effects 0.000 abstract description 2
- 239000004744 fabric Substances 0.000 description 11
- 230000000903 blocking effect Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000004840 adhesive resin Substances 0.000 description 2
- 229920006223 adhesive resin Polymers 0.000 description 2
- 230000004323 axial length Effects 0.000 description 2
- 238000009730 filament winding Methods 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
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- 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
- B29C70/32—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 on a rotating mould, former or core
- B29C70/323—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 on a rotating mould, former or core on the inner surface of a rotating mould
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- 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
- B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
-
- 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
-
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Composite Materials (AREA)
- Mechanical Engineering (AREA)
- Moulding By Coating Moulds (AREA)
Abstract
The application discloses a manufacturing method of a prefabricated blade root, which comprises the steps of providing a mold, wherein the contour of the wall part of the mold is barrel-shaped, and the outer surface of the mold is provided with a plurality of annular steps which are distributed in a connecting way along the axial direction of the mold; winding fiber filaments containing resin on the mould release layer, and winding and filling at least part of the steps by the fiber filaments to form a fiber layer with a smooth surface; curing the fiber layer to form a prefabricated molded body; and demolding the prefabricated forming body and the mold to form the prefabricated blade root. The prefabricated blade root manufacturing method can provide enough tension for the fibers, avoid the defects that the fibers are axially wrinkled, accurately control the length of the laid fiber layers, and enable the manufactured prefabricated blade root to reach the required length.
Description
Technical Field
The application belongs to the technical field of wind power generation, and particularly relates to a manufacturing method of a prefabricated blade root.
Background
The wind generating set comprises a tower barrel which is fixedly arranged, a cabin which is supported by the tower barrel, a hub which is fixedly connected with a main shaft of the cabin, and blades which are arranged on the hub. The part of the blade fixedly connected with the hub is a blade root, and the part of the blade farthest from the hub is a blade tip. The blade is one of the most important components in the wind turbine, and the quality of the performance of the blade directly influences the quality of the whole machine. In the case of blade research, the root portion is a part of the design priority, since it is not only the root portion that bears the weight and various loads of the entire blade, but is also the most direct connection part of the blade to other parts of the wind power plant.
Along with the increase of generating power, fan blade develops to the direction of length increase, and the blade root is the key position of bearing the weight of blade, along with blade length increase constantly, and blade root load increases, and the fibrous layer number of blade root greatly increased, in order to improve manufacturing efficiency, adopts prefabricated blade root more, and the prefabricated blade root of manufacturing needs lay the axle cloth in the mould, then vacuum introduction resin and solidification shaping.
However, unavoidable errors can be generated in the manufacturing process of paving the prefabricated blade root, and as enough tensioning force cannot be applied to the end part of the shaft cloth when the shaft cloth is paved, the fiber of the shaft cloth can be subjected to fiber axial wrinkling; even if the fiber is tensioned by a machine for tensioning the fiber, the arrangement between the fibers is affected by the adhesive resin coated on the fiber, so that the length of the finally formed fiber layer cannot be precisely controlled by the machine.
Disclosure of Invention
The embodiment of the application provides a prefabricated blade root manufacturing method, which can provide enough tension for fibers, avoid the defects that the fibers are axially wrinkled, and accurately control the length of a laid fiber layer so that the manufactured prefabricated blade root can reach the required length.
The application provides a prefabricated blade root manufacturing method, wherein the prefabricated blade root manufacturing method comprises the following steps: providing a mold, wherein the contour of the wall part of the mold is barrel-shaped, and the outer surface of the mold is provided with a plurality of annular steps which are distributed in a connecting way along the axial direction of the mold; winding fiber filaments containing resin on a mould release layer, wherein the fiber filaments are used for winding and filling at least part of a plurality of steps to form a fiber layer with a smooth surface; curing the fiber layer to form a prefabricated molded body; and demolding the prefabricated forming body and the mold to form the prefabricated blade root.
The method for manufacturing a preformed blade root as described above, wherein in the step of providing a mold, the mold includes an outer peripheral surface parallel to an axial direction thereof, and the step includes a side surface parallel to the axial direction and an end surface perpendicular to the axial direction.
The prefabricated blade root manufacturing method as described above, wherein a side surface of one of the adjacent two steps is connected to an end surface of the other step, and distances between the side surfaces of the steps distributed along the axial direction of the die and the outer peripheral surface are sequentially increased.
In the method for manufacturing a prefabricated blade root as described above, in the step of winding a fiber yarn containing a resin on the mold release layer, when one of the steps winds the fiber yarn, the fiber yarn is wound from an arbitrary position of the outer peripheral surface in the axial direction to an end face of the step in the axial direction, so that a layer of the fiber layer is formed, and an outer surface of the layer of the fiber layer is disposed flush with the side face of the step.
The method for manufacturing a prefabricated blade root as described above, wherein the step of winding the resin-containing filament on the mold release layer further comprises winding the filament around the outer surface of the wound filament layer until the filament abuts against the outer surface of the step to be wound, when winding the filament around the step adjacent to the first step, to form another layer of the filament layer.
The method for manufacturing the prefabricated blade root, wherein in the step of winding the fiber yarn containing resin on the mould release layer, the fiber yarn is wound on a plurality of steps which are arranged continuously, so that an inner fiber layer formed by a plurality of fiber layers is formed; an embedded part is arranged on the outer surface of the inner fiber layer, the width of the end face of the step propped against the embedded part along the axial direction is larger than the width of the rest of the steps, one end of the embedded part is propped against one step, and the embedded part is fixedly connected with the outer surface of the inner fiber layer; and continuously winding the fiber yarns on the outer surface of the embedded part, and sequentially winding the fiber yarns around the embedded part along a plurality of steps which are continuously arranged to form an outer fiber layer.
The method for manufacturing a prefabricated blade root as described above, wherein after the step of forming the outer fibrous layer, further comprises providing a protective layer on an outer surface of the outer fibrous layer.
The method for manufacturing the prefabricated blade root, wherein the method for manufacturing the prefabricated blade root further comprises the following steps: and assembling and fixedly connecting the prefabricated blade root with the wind power blade main body.
The prefabricated blade root manufacturing method as described above, wherein the die includes fixing devices, the fixing devices are disposed at two ends of the die, and the step of tensioning and winding the fiber filaments disposed on the outer wall of the die includes: the fixing device is used for hanging the fiber yarn at one end of the die; winding the fiber filaments on the outer peripheral surface of the die from one end to the other end of the die; and the fixing device is used for hanging the fiber yarn at the other end of the die.
The method for manufacturing a prefabricated blade root as described above, wherein in the step of winding the resin-containing filament yarn on the mold release layer, the winding manner is one of dry winding, semi-dry winding, or wet winding.
The application provides a manufacturing method of a prefabricated blade root, which comprises the steps of providing a die and winding fiber containing resin on a die release layer, wherein the outline of the wall part of the die is barrel-shaped, tensioning the fiber mechanically and winding the fiber to the outer wall of the barrel-shaped die to form a barrel-shaped fiber layer with smooth appearance, and the fiber is not wrinkled in the winding process, so that the fiber layer formed by the fiber is prevented from being wrinkled axially, and compared with the manufacturing method of manually paving shaft cloth, the surface of the fiber layer is smoother; the outer surface of the mould provided by the prefabricated blade root manufacturing method is provided with a plurality of annular steps which are distributed along the axial direction of the mould, and in the process of winding the fiber on the mould release layer, the fiber is wound and filled at least partially in the steps until the fiber is wound to be suitable along the axial length of the mould, so that a fiber layer is formed, the steps play a blocking role on the fiber, and the fiber winding process can be effectively controlled.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments of the present application will be briefly described, and it is possible for a person skilled in the art to obtain other drawings according to these drawings without inventive effort.
FIG. 1 is a flow chart of a method of manufacturing a preformed blade root according to an embodiment of the present application;
FIG. 2 is a schematic view of a fibrous layer of a method of manufacturing a preformed blade root according to an embodiment of the present application;
fig. 3 is a schematic structural view of a mold for a method of manufacturing a prefabricated blade root according to an embodiment of the present application.
Reference numerals illustrate:
10. a fibrous layer; 20. a mold; 21. a step.
Detailed Description
Features and exemplary embodiments of various aspects of the present application are described in detail below to make the objects, technical solutions and advantages of the present application more apparent, and to further describe the present application in conjunction with the accompanying drawings and the detailed embodiments. It should be understood that the specific embodiments described herein are intended to be illustrative of the application and are not intended to be limiting. It will be apparent to one skilled in the art that the present application 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 application by showing examples of the present application.
As shown in fig. 1 to 3, a method for manufacturing a prefabricated blade root according to an embodiment of the present application includes:
s110, providing a die 20, wherein the outline of the wall part of the die 20 is barrel-shaped, and the outer surface of the die 20 is provided with a plurality of annular steps 21 which are connected and distributed along the axial direction of the die 20;
s120, winding fiber yarn containing resin on a release layer of the die 20, wherein the fiber yarn winds and fills at least part of the steps 21 to form a fiber layer 10 with a smooth surface;
s130, curing the fiber layer 10 to form a prefabricated molded body;
and S140, demolding the prefabricated forming body and the mold 20 to form the prefabricated blade root.
In steps S110 and S120, when the fiber filament is wound on the outer surface of the mold 20, the fiber filament is tensioned and wound on the barrel-shaped outer surface of the mold 20 by a machine such as a fiber creel for winding the fiber filament, so that the fiber layer 10 formed by the fiber filament is prevented from being wrinkled in the winding process, and the surface of the fiber layer 10 formed by the method is smoother than that of the fiber layer formed by a manufacturing method of manually laying a shaft cloth.
When adopting the manufacturing method of manual laying axle cloth, axle cloth is usually the unipolar cloth that sets up along axial or has fixed angle's biax cloth, and adopts the mode of winding fiber silk in this application embodiment, and the winding angle of fiber silk can freely be adjusted, can form more different structures.
In the process of manually laying shaft cloth, two semicircular prefabricated blade roots are formed at first, and then the two semicircular prefabricated blade roots are spliced together to form a complete prefabricated blade root, residual stress can be released in the resin curing process, and the spliced part is rebounded, so that the prefabricated blade root can be tilted at the spliced part by the manufacturing mode, the prefabricated blade root formed by winding in the application is a complete revolving body, the prefabricated blade root can be restrained integrally, and compared with the spliced prefabricated blade root, the situation of tilting of the spliced part can not occur.
In steps S110 and S120, at least part of the steps 21 is wound and filled with the fiber filament until the fiber filament is wound to a proper length along the axial direction of the die 20, so as to form the fiber layer 10, at this time, the steps 21 play a role in blocking the fiber filament, so that the winding of the fiber filament can be stopped when the fiber filament is wound to a certain step 21, the winding process of the fiber filament is effectively controlled, and it can be understood that, as the fiber filament is coated with the adhesive resin, compared with the preset fiber filament length set by using a machine, the method for manufacturing the prefabricated blade root in the embodiment of the application can stop winding in time, so that the manufactured prefabricated blade root can reach the required length.
In step S130, the fiber layer 10 formed in step S120 is cured to form a preform having a desired hardness, and in step S140, the preform is released from the mold 20 to form a preform root having a desired use.
Specifically, in the process of curing the fiber layer 10 in step S130, the fiber layer 10 and the mold 20 are integrally and jointly placed into a curing oven to be rotationally cured, so as to finally form a prefabricated molded body; each fiber yarn of the fiber layer 10 is coated with resin, the resin has viscosity, so that the fiber yarns can be firmly bonded to form an integral fiber layer 10, the resin can be uniformly dispersed and arranged on the fiber yarns through rotating in the process of rotating and solidifying, heating operation is needed when the fiber yarns are rotated and solidified, the resin can be solidified through heating, the bonding between the fiber yarns is firmer, and the formed prefabricated formed body is more stable.
In particular, in step S120, a four-axis linkage or more advanced winding machine is required to wind the fiber on the release layer of the die 20, the die 20 is first installed on the winding machine, the shape and size of the die 20 and the data of the fiber layer 10 to be obtained are input in the numerical control system, and then the winding machine winds the fiber on the release layer of the die 20 according to the data to form the fiber layer 10 meeting the requirements.
As shown in fig. 3, in the method for manufacturing a preformed blade root according to the embodiment of the present application, as an example, the die 20 includes an outer circumferential surface parallel to the axial direction thereof, and the step 21 includes a side surface parallel to the axial direction and an end surface perpendicular to the axial direction. The end face of the step 21 is perpendicular to the axial direction of the step 21, so that the fiber yarn can be blocked by the end face of the step 21 when being wound on the end face of a certain step 21, and the fiber yarn can be timely stopped from winding, so that the fiber layer 10 with accurate size is obtained, and the step 21 plays a role in positioning and blocking in the process.
As shown in fig. 3, the side surface of one step 21 of the adjacent two steps 21 among the plurality of steps 21 of the die 20 is connected to the end surface of the other step 21, and the distances between the side surfaces of the plurality of steps 21 distributed along the axial direction of the die 20 and the outer peripheral surface sequentially increase. When the filament is wound around the die 20 along the steps 21 in sequence, each step 21 is correspondingly wound with a layer of the fiber layer 10, and as the distance between the side surfaces and the outer peripheral surfaces of the steps 21 increases in sequence, the thickness of the formed overall fiber layer 10 perpendicular to the axial direction increases as the number of filament winding steps 21 increases.
In the method for manufacturing the prefabricated blade root, in the step of winding the fiber yarn containing the resin on the demolding layer of the mold 20, when the fiber yarn is wound on one step 21, the fiber yarn is wound on the end face of the step 21 along the axial direction from any position of the outer peripheral surface to form one fiber layer 10, and the outer surface of the one fiber layer 10 is flush with the side face of the step 21, so that the thickness of the one fiber layer 10 along the direction perpendicular to the axial direction is ensured to be fixed.
In this step, when the filament is wound from the outer circumferential surface of the die 20 toward the end surface of the step 21, the filament is immediately stopped from winding up to the end surface, forming the filament layer 10 fixed along the axial length of the die 20, and therefore the end surface of the step 21 plays a role in positioning and stopping the filament winding.
In the method for manufacturing the prefabricated blade root according to the embodiment of the present application, in the step of winding the fiber filament containing resin on the release layer of the mold 20, when winding the fiber filament around the step 21 adjacent to the first step 21, the fiber filament is wound around the outer surface of the wound fiber layer 10 until the fiber filament abuts against the outer surface of the step 21 to be wound, so as to form another fiber layer 10.
In this step, the outer surface of the first fiber layer 10 is flush with the side surface of the first step 21, so that the fiber yarn is wound around the second step 21 adjacent to the first step 21, and the fiber layer 10 with a smooth inner surface can be formed, and since the end surface of the second step 21 is different from the end surface of the first step 21 in the axial direction of the die 20, the length of the second fiber layer 10 in the axial direction is greater than the length of the first fiber layer 10 in the axial direction, and the length of the fiber layer 10 formed as a whole by the first fiber layer 10 and the second fiber layer 10 is the length of the second fiber layer 10.
The method for manufacturing the prefabricated blade root in the embodiment of the application, wherein in the step of winding the fiber yarn containing resin on the demolding layer of the mold 20, the fiber yarn is wound on a plurality of steps 21 which are arranged continuously, so that an inner fiber layer formed by the multi-layer fiber layer 10 is formed; an embedded part is arranged on the outer surface of the inner fiber layer, the width of the end face of the step 21 propped against the embedded part along the axial direction is larger than the width of the rest of the steps 21, one end of the embedded part is propped against one step 21, and the embedded part is fixedly connected with the outer surface of the inner fiber layer; and continuously winding fiber yarns on the outer surface of the embedded part, and sequentially winding the fiber yarns around the embedded part along a plurality of continuously arranged steps 21 to form an outer fiber layer.
The wind power blade is installed and connected to the fan hub through the embedded part in the blade root, the embedded part has the effect of enhancing the connection strength of the prefabricated blade root, the inner fiber layer and the outer fiber layer are arranged on two sides of the embedded part, the embedded part is wrapped, and the embedded part can be stably arranged in the prefabricated blade root.
Specifically, the embedded part comprises a yarn winding bolt sleeve, a wedge block and other materials, the bolt sleeve is used for connecting a fan hub, the wedge block is used for positioning the bolt sleeve, the embedded part is bonded on the surface of the inner fiber layer in a manual bonding mode, one end of the embedded part is abutted on the end face of the step 21, and the thickness of the embedded part along the axial direction perpendicular to the die 20 is thicker, so that when the step 21 abutted by the embedded part is arranged, the width of the end face along the axial direction needs to be set to be larger than the width of the rest step 21.
The manufacturing method of the prefabricated blade root further comprises the step of arranging a protective layer on the outer surface of the outer fiber layer after the step of forming the outer fiber layer.
Because the fiber filaments in the formed fiber layer 10 are not firmly bonded after the fiber filaments are wound around the mold 20, a protective layer needs to be arranged on the outer surface of the outer fiber layer, so that the fiber layer 10 can maintain the wound shape as a whole, and the deformation of the fiber layer 10 is avoided, thereby avoiding the deformation of the appearance shape of the manufactured prefabricated blade root.
The manufacturing method of the prefabricated blade root in the embodiment of the application further comprises the following steps: and assembling and fixedly connecting the prefabricated blade root and the wind power blade main body to form the integral wind power blade.
In particular, before the step of manufacturing the mold 20, the method for manufacturing the prefabricated blade root further comprises setting the dimensional parameters of the fiber layer 10; the dimensional parameters of the mold 20 are set, and the steps 21 are designed according to the dimensional parameters of the fiber layer 10, so that the fiber layer 10 obtained by winding the mold 20 can meet the use requirements.
The method for manufacturing the prefabricated blade root in the embodiment of the present application, wherein the die 20 includes a fixing device, the fixing device is disposed at two ends of the die 20, and the step of tensioning and winding the fiber filaments on the outer wall of the die 20 includes: a fixing device for hanging the fiber yarn at one end of the die 20; winding the fiber filaments around the outer circumferential surface of the die 20 from one end to the other end of the die 20; and a fixing device for hanging the fiber yarn at the other end of the die 20.
The cellosilk is in winding in the in-process of tubulose mould 20, because there is not fixed basis, when the cellosilk contacts in the surface of mould 20, can't be fixed in the surface of mould 20, influence to the winding, therefore in this step, through setting up fixing device at the both ends of mould 20, one end of cellosilk is fixed in fixing device, make the cellosilk have fixed basis, the skew can not appear at the in-process cellosilk of winding, and after fibrous layer 10 winding finishes, hang the other end of cellosilk and locate the fixing device of mould 20 other end, fibrous layer 10 wholly realizes fixing.
In practice, after the fiber layer 10 is wound, the fixing devices at the two ends of the mold 20 can be disassembled, and the fiber filaments fixed on the fixing devices are removed at the same time to form the complete fiber layer 10.
Specifically, the fixing device is a yarn hanger, and the yarn hanger can fix the fiber yarn.
In the method for manufacturing a prefabricated blade root according to the embodiment of the present application, in the step of winding the fiber yarn containing the resin on the mold 20 release layer, the winding manner is one of dry winding, semi-dry winding, or wet winding.
Specifically, the dry winding is easy to control the glue content of the whole prefabricated blade root, and the resin on the surface of the fiber layer 10 wound by the dry winding is not in a completely melted state, so that the fiber layer 10 is not required to be solidified by rotation and only heated, and the whole fiber layer 10 is solidified and formed; when semi-dry winding or wet winding is adopted, the spinning solidification is required while heating, and the melted resin is uniformly diffused to each fiber yarn.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other like elements in a process, method, article or apparatus that comprises the element.
In the foregoing, only the specific embodiments of the present application are described, and it will be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working processes of the systems, modules and units described above may refer to the corresponding processes in the foregoing method embodiments, which are not repeated herein. It should be understood that the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive various equivalent modifications or substitutions within the technical scope of the present application, which are intended to be included in the scope of the present application.
Claims (10)
1. A method of manufacturing a preformed blade root, the method comprising:
providing a mold (20), wherein the wall profile of the mold (20) is barrel-shaped, and the outer surface of the mold is provided with a plurality of annular steps (21) which are axially connected and distributed along the mold (20);
winding a fiber yarn containing resin on a release layer of a die (20), wherein the fiber yarn winds and fills at least part of a plurality of steps (21) to form a fiber layer (10) with a smooth surface;
curing the fiber layer (10) to form a prefabricated molded body;
and demolding the prefabricated forming body and the mold (20) to form the prefabricated blade root.
2. The method of manufacturing a preformed blade root according to claim 1, wherein in the step of providing a mold (20), the mold (20) comprises an outer circumferential surface parallel to the axial direction thereof, and the step (21) comprises a side surface parallel to the axial direction and an end surface perpendicular to the axial direction.
3. The method of manufacturing a preformed blade root according to claim 2, wherein a side surface of one step (21) of adjacent two steps (21) among the plurality of steps (21) is connected to an end surface of the other step (21), and distances between the side surfaces of the plurality of steps (21) distributed in the axial direction of the die (20) and the outer peripheral surface are sequentially increased.
4. The method of manufacturing a preformed blade root of claim 2,
in the step of winding the fiber yarn containing the resin on the mold (20) release layer, when one step (21) winds the fiber yarn, the fiber yarn is wound to the end face of the step (21) along the axial direction from any position of the outer peripheral surface along the axial direction, so as to form a layer of fiber layer (10), and the outer surface of the fiber layer (10) is arranged flush with the side face of the step (21).
5. The method of manufacturing a preformed blade root of claim 4,
the step of winding the fiber yarn containing resin on the release layer of the die (20) further comprises winding the fiber yarn on the outer surface of the wound fiber layer (10) when the step (21) adjacent to the first step (21) winds the fiber yarn until the fiber yarn is abutted against the outer surface of the step (21) to be wound, so as to form another fiber layer (10).
6. The method of manufacturing a preformed blade root of claim 5,
the step of winding the fiber yarn containing resin on the demolding layer of the mold (20) further comprises winding the fiber yarn on a plurality of steps (21) which are arranged continuously to form an inner fiber layer formed by a plurality of fiber layers (10);
an embedded part is arranged on the outer surface of the inner fiber layer, one end of the embedded part is propped against one step (21), the width, along the direction perpendicular to the axial direction, of the end face of the step (21) propped against the embedded part is larger than the width of the rest of the step (21), and the embedded part is fixedly connected with the outer surface of the inner fiber layer;
and continuously winding the fiber yarns on the outer surface of the embedded part, and sequentially winding the fiber yarns along a plurality of steps (21) which are continuously arranged on the embedded part to form an outer fiber layer.
7. The method of manufacturing a preformed blade root of claim 6, further comprising providing a protective layer on an outer surface of the outer fibrous layer after the step of forming the outer fibrous layer.
8. The method of manufacturing a preformed blade root of claim 1, further comprising:
and assembling and fixedly connecting the prefabricated blade root with the wind power blade main body.
9. The method of manufacturing a preformed blade root according to claim 1, wherein the mould (20) comprises fixing means arranged at both ends of the mould (20), the step of tensioning and winding the filaments arranged on the outer wall of the mould (20) comprising:
the fixing device is used for hanging the fiber yarn at one end of the die (20);
winding the fiber filaments around the outer circumferential surface of the die (20) from one end to the other end of the die (20);
and the fixing device is used for hanging the fiber yarn at the other end of the die (20).
10. The method of manufacturing a preformed blade root according to claim 1, wherein in the step of winding the resin-containing filaments on the mold (20) release layer, the winding is one of dry winding, semi-dry winding or wet winding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310263511.1A CN116394539A (en) | 2023-03-10 | 2023-03-10 | Method for manufacturing prefabricated blade root |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310263511.1A CN116394539A (en) | 2023-03-10 | 2023-03-10 | Method for manufacturing prefabricated blade root |
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| Publication Number | Publication Date |
|---|---|
| CN116394539A true CN116394539A (en) | 2023-07-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310263511.1A Pending CN116394539A (en) | 2023-03-10 | 2023-03-10 | Method for manufacturing prefabricated blade root |
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| Country | Link |
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| CN (1) | CN116394539A (en) |
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- 2023-03-10 CN CN202310263511.1A patent/CN116394539A/en active Pending
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