CN114683531A - Fan blade, fan blade sandwich and manufacturing method thereof - Google Patents
Fan blade, fan blade sandwich and manufacturing method thereof Download PDFInfo
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- CN114683531A CN114683531A CN202011607937.7A CN202011607937A CN114683531A CN 114683531 A CN114683531 A CN 114683531A CN 202011607937 A CN202011607937 A CN 202011607937A CN 114683531 A CN114683531 A CN 114683531A
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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
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/10—Processes of additive manufacturing
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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
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/30—Auxiliary operations or equipment
- B29C64/386—Data acquisition or data processing for additive manufacturing
- B29C64/393—Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y10/00—Processes of additive manufacturing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y50/00—Data acquisition or data processing for additive manufacturing
- B33Y50/02—Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes
-
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Optics & Photonics (AREA)
Abstract
The embodiment of the disclosure provides a fan blade, a fan blade sandwich and a manufacturing method thereof, wherein the manufacturing method of the fan blade sandwich comprises the following steps: designing three-dimensional model data and corresponding wall thickness for the sandwich, designing a printing structure of the sandwich, and designing a flow channel of the sandwich to generate a 3D printing model; and printing the sandwich through a 3D printer and the 3D printing model to obtain the sandwich for the fan blade. The embodiment of the disclosure manufactures the fan blade sandwich through 3D printing, and compared with the traditional balsawood, the fan blade sandwich is lighter in weight and better in uniformity, and meanwhile, the filling is improved, so that the fan blade sandwich has obvious advantages.
Description
Technical Field
The disclosure relates to the field of product manufacturing, in particular to a fan blade, a fan blade sandwich and a manufacturing method thereof.
Background
The horizontal axis fan conversion energy efficiency is high, and the price of a power grid is already balanced in many areas. As shown in FIG. 1, the sandwich is arranged at the position on the fan blade, and the section of the position corresponding to the sandwich is of a sandwich structure, i.e. the upper part and the lower part of the sandwich are respectively made of glass fiber reinforced plastics. Most of core materials of the blades of the existing horizontal shaft fans are made of balsa wood (namely balsa wood foam), and each sandwich is usually formed by splicing a plurality of balsa wood. Balsa is a naturally occurring wood product that has significant differences in density, strength and stiffness between the individual logs used to make the balsa core product. Even if approximately the same density is achieved in the selection of wood, the core material is still highly variable in properties. When the balsa wood product is subjected to strength or hardness tests, the test results of the balsa wood product are greatly dispersed among single samples, the wood product can absorb moisture to cause size change, the manufacturing is limited by the variability of the balsa wood, and further, when the blade or larger blades are manufactured, the performance of the blade is influenced, and the service life of a horizontal shaft fan is shortened.
Disclosure of Invention
In view of this, the embodiment of the present disclosure provides a fan blade, a fan blade sandwich and a manufacturing method thereof, so as to solve the following problems in the prior art: the variability of balsa wood limits manufacturing and, in turn, affects the performance of the blade and reduces the life of the horizontal axis fan when manufacturing blades or larger.
On one hand, the embodiment of the disclosure provides a manufacturing method of a fan blade sandwich, which comprises the following steps: designing three-dimensional model data and corresponding wall thickness for the sandwich, designing a printing structure of the sandwich, and designing a flow channel of the sandwich to generate a 3D printing model; and printing the sandwich through a 3D printer and the 3D printing model to obtain the sandwich for the fan blade.
In some embodiments, designing three-dimensional model data and corresponding wall thickness for the sandwich core, designing a printing structure of the sandwich core, and designing a flow channel of the sandwich core to generate the 3D printing model includes: inputting the three-dimensional model data of the sandwich into the 3D printer so as to determine the condition of the split printing of the sandwich of the single fan blade and the three-dimensional model data of each sub-sandwich to be printed after the split according to the limited size of the 3D printer; determining the corresponding wall thickness of the sub-sandwich according to the three-dimensional model data of the sub-sandwich, designing a printing structure of the sub-sandwich, and designing a flow channel of the sub-sandwich to generate the 3D printing model.
In some embodiments, the printing the core through the 3D printer and the 3D printing model to obtain the core for the fan blade includes: printing each sub-sandwich through a 3D printer and the 3D printing model to obtain a plurality of sub-sandwiches; and splicing the multiple sub-cores to obtain a single fan blade core.
In some embodiments, the splicing the multiple sub-cores to obtain a single fan blade core includes: coating glue on the connecting surfaces of the sub-cores which are connected with each other for connection so as to obtain a complete single fan blade core; or, the sub-cores are connected through a mechanical structure or a combination of the mechanical structure and resin to obtain a complete single fan blade core.
In some embodiments, the printing material used by the 3D printer includes at least: polylactide PLA, acrylonitrile-butadiene-styrene copolymer ABS, polyamide PA, photosensitive resin or a composite material of the materials.
In some embodiments, the printing mode of the 3D printer includes at least one of: melt extrusion, photocuring and laser sintering.
In some embodiments, the printing structure comprises at least: a truss structure or a lattice structure.
On the other hand, the embodiment of the disclosure provides a fan blade sandwich which is manufactured by adopting the manufacturing method of the fan blade sandwich in any embodiment of the disclosure.
On the other hand, the embodiment of the present disclosure provides a manufacturing method of a fan blade, including: the fan blade sandwich is manufactured by the manufacturing method of the fan blade sandwich in any embodiment of the disclosure; and glass fiber reinforced plastics are respectively arranged on the inner side and the outer side of the fan blade sandwich.
On the other hand, the embodiment of the disclosure provides a fan blade, which is manufactured by adopting the manufacturing method of the fan blade in any embodiment of the disclosure.
According to the embodiment of the invention, the fan blade sandwich is manufactured by the 3D printer, the obtained inner core structure and performance are stable, the service lives of the blades and the fan are prolonged, the weight of the sandwich can be adjusted according to the printing structure, and accurate balance weight of a plurality of sandwiches is realized; compared with the traditional balsawood, the lightweight balsawood has lighter weight and better uniformity, improves the pouring and has obvious advantages.
Drawings
In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only some embodiments described in the present disclosure, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic view of a sandwich arranged on a fan blade in the prior art;
fig. 2 is a first flowchart of a manufacturing method of a fan blade sandwich provided in the embodiment of the present disclosure;
FIG. 3 is a schematic diagram of a unit truss structure provided by an embodiment of the present disclosure;
fig. 4 is a schematic view of a position of a flow passage in a truss structure provided by an embodiment of the disclosure;
FIG. 5 is a schematic view illustrating the design of flow channels in various directions in a sandwich core according to an embodiment of the present disclosure;
FIG. 6 is a schematic diagram of a unit lattice structure provided by an embodiment of the present disclosure;
FIG. 7 is a cross-sectional view of a unit lattice structure provided by an embodiment of the present disclosure;
fig. 8 is a first schematic view of the core provided in the embodiment of the present disclosure split into a plurality of sub-cores;
fig. 9 is a schematic diagram of the sandwich core provided in the embodiment of the present disclosure split into a plurality of sub-sandwich cores;
fig. 10 is a second flowchart of a method for manufacturing a fan blade sandwich according to an embodiment of the present disclosure.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present disclosure more clear, the technical solutions of the embodiments of the present disclosure will be described below clearly and completely with reference to the accompanying drawings of the embodiments of the present disclosure. It is to be understood that the described embodiments are only a few embodiments of the present disclosure, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the disclosure without inventive step, are within the scope of protection of the disclosure.
Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The use of "first," "second," and similar terms in this disclosure is not intended to indicate any order, quantity, or importance, but rather is used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.
To maintain the following description of the embodiments of the present disclosure clear and concise, a detailed description of known functions and known components have been omitted from the present disclosure.
The embodiment of the disclosure provides a method for manufacturing fan blade sandwich, the flow of the method is shown in fig. 2, and the method comprises the following steps of S101 to S102:
s101, designing three-dimensional model data and corresponding wall thickness for the sandwich, designing a printing structure of the sandwich, and designing a flow channel of the sandwich to generate a 3D printing model.
In the implementation, three-dimensional model data, wall thicknesses of all parts and flow channels of the sandwich need to be determined according to the actual design requirements of the sandwich, and the sandwich needs to be printed in a 3D mode, so that the printing structure of the sandwich needs to be determined, if the sandwich is filled in a solid mode, the sandwich has good support performance, but the sandwich is heavy in weight, and 3D printing raw materials are wasted, so that the printing structure is usually designed to be a truss structure or a lattice structure.
FIG. 3 is a schematic view of a unit truss structure; in general, due to the large size of the core, one core may be divided into a plurality of sub-cores for printing, and finally, the plurality of sub-cores are spliced to form one core, and since the core needs to design a flow channel, the position of the flow channel in the truss structure may be as shown in fig. 4, of course, in order to allow more connections between the core and the glass fiber reinforced plastic, a person skilled in the art may design more flow channels in the core, for example, as shown in fig. 5, flow channels in various directions may be designed in the core.
As shown in fig. 6, which is a schematic view of a unit lattice structure, it is equivalent to adding a supporting structure in a unit truss structure, and since the lattice structure of the embodiment of the present disclosure is designed with a blade core, it is necessary to design a flow channel of the core, as shown in fig. 7 (a cross-sectional view of the unit lattice structure), the flow channel may be designed in a central portion. The related design can be carried out by those skilled in the art according to the actual requirement.
After the pre-design is completed, data such as three-dimensional model data of the sandwich, a printing structure, a flow channel of the sandwich and the like can be input in a 3D printing program, and then a 3D printing model which can be directly executed by a 3D printer is generated.
S102, printing the sandwich through a 3D printer and a 3D printing model to obtain the sandwich for the fan blade.
The 3D printer may print with different 3D printing materials according to the requirement of the core, for example, PLA (polylactide), ABS (acrylonitrile-butadiene-styrene copolymer), PA (polyamide), photosensitive resin and its composite material, or a composite material of the above materials may also be used. Different printing methods, such as melt extrusion, photo-curing, laser sintering, etc., may be used for different materials, and the embodiments of the present disclosure are not limited thereto.
This disclosed embodiment makes fan blade core of pressing from both sides through the 3D printer, and the inner core structure and the performance that obtain are all comparatively stable, have promoted the life of blade and fan, and can press from both sides the weight of core according to printing the structure adjustment, realize the accurate counter weight of a plurality of cores of pressing from both sides.
If a small fan, the sandwich can be printed directly, but if for a large fan, the blade size of the fan can be tens of meters, so that the 3D printer may not be able to print such a large sandwich directly, and then the printing can be split. As shown in fig. 8, the core may be split into a plurality of sub-cores (each small cell is a sub-core) as shown in the figure, or as shown in fig. 9, the core may be split into a plurality of sub-cores (each part divided by a solid line is a sub-core), and the specific splitting condition may be determined according to the upper limit of printing of the 3D printer and the difficulty level in post-splicing.
Specifically, as shown in fig. 10, the method includes the following steps S201 to S204:
s201, inputting the three-dimensional model data of the sandwich core into a 3D printer, and determining the condition of split printing of the sandwich core of a single fan blade and the three-dimensional model data of each sub-sandwich core to be printed after the split according to the limited size of the 3D printer.
S202, determining the corresponding wall thickness of the sub-sandwich according to the three-dimensional model data of the sub-sandwich, designing a printing structure of the sub-sandwich, and designing a flow channel of the sub-sandwich to generate a 3D printing model.
So far, each sub-sandwich generates a respective 3D printing model.
And S203, printing the sub-sandwich through a 3D printer and a 3D printing model to obtain a plurality of sub-sandwiches.
And S204, splicing the multiple sub-cores to obtain a single fan blade core. The sub-cores are spliced to obtain a complete single fan blade core.
The 3D printed core material can provide advantages not typically found with traditional balsa core materials, such as lighter weight, lower cost, more versatile design, more optimized blade production in cooperation with core material assemblers, improved infusion process, better suitability for smaller numbers and larger core pieces, and improved uniformity due to less core material gaps.
The embodiment of the disclosure also provides a fan blade sandwich which is manufactured by adopting the manufacturing method of the fan blade sandwich in the embodiment, and the specific structure is not repeated herein.
The embodiment of the disclosure further provides a manufacturing method of the fan blade, the method includes firstly manufacturing the fan blade sandwich through the manufacturing method of the fan blade sandwich in the embodiment, and if the sandwich is split into the plurality of 3D printing models, the plurality of sub-sandwiches are printed and then spliced. The specific operation process can refer to the existing light wood sandwich splicing process, and is not described herein again. Further, the embodiment of the present disclosure further provides a fan blade, which is manufactured by the manufacturing method of the fan blade, and the specific structure is not repeated here.
The embodiment of the disclosure obtains the core through the 3D printing mode, has higher precision, does benefit to manufacturing, has reduced the whole manufacturing time of fan blade, has promoted industrial efficiency.
Moreover, although exemplary embodiments have been described herein, the scope thereof includes any and all embodiments based on the disclosure with equivalent elements, modifications, omissions, combinations (e.g., of various embodiments across), adaptations or alterations. The elements of the claims are to be interpreted broadly based on the language employed in the claims and not limited to examples described in the present specification or during the prosecution of the application, which examples are to be construed as non-exclusive. It is intended, therefore, that the specification and examples be considered as exemplary only, with a true scope and spirit being indicated by the following claims and their full scope of equivalents.
The above description is intended to be illustrative and not restrictive. For example, the above-described examples (or one or more versions thereof) may be used in combination with each other. For example, other embodiments may be used by those of ordinary skill in the art upon reading the above description. In addition, in the foregoing detailed description, various features may be grouped together to streamline the disclosure. This should not be interpreted as an intention that a disclosed feature not claimed is essential to any claim. Rather, the subject matter of the present disclosure may lie in less than all features of a particular disclosed embodiment. Thus, the following claims are hereby incorporated into the detailed description as examples or embodiments, with each claim standing on its own as a separate embodiment, and it is contemplated that these embodiments may be combined with each other in various combinations or permutations. The scope of the disclosure should be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled.
While the present disclosure has been described in detail with reference to the embodiments, the present disclosure is not limited to the specific embodiments, and those skilled in the art can make various modifications and alterations based on the concept of the present disclosure, and the modifications and alterations should fall within the scope of the present disclosure as claimed.
Claims (10)
1. The manufacturing method of the fan blade sandwich is characterized by comprising the following steps:
designing three-dimensional model data and corresponding wall thickness for the sandwich, designing a printing structure of the sandwich, and designing a flow channel of the sandwich to generate a 3D printing model;
and printing the sandwich through a 3D printer and the 3D printing model to obtain the sandwich for the fan blade.
2. The method of manufacturing according to claim 1, wherein designing three-dimensional model data and corresponding wall thicknesses for the core, designing a printed structure for the core, designing a flow channel for the core to generate a 3D printed model comprises:
inputting the three-dimensional model data of the sandwich into the 3D printer so as to determine the condition of the split printing of the sandwich of the single fan blade and the three-dimensional model data of each sub-sandwich to be printed after the split according to the limited size of the 3D printer;
determining the corresponding wall thickness of the sub-sandwich according to the three-dimensional model data of the sub-sandwich, designing a printing structure of the sub-sandwich, and designing a flow channel of the sub-sandwich to generate the 3D printing model.
3. The manufacturing method of claim 2, wherein the printing the core through a 3D printer and the 3D printed model to obtain a core for a fan blade comprises:
printing each sub-sandwich through a 3D printer and the 3D printing model to obtain a plurality of sub-sandwiches;
and splicing the multiple sub-cores to obtain a single fan blade core.
4. The method of manufacturing of claim 3, wherein splicing the plurality of sub-cores to obtain a single fan blade core comprises:
coating glue on the connecting surfaces of the sub-cores which are connected with each other for connection so as to obtain a complete single fan blade core; alternatively, the first and second electrodes may be,
and connecting the sub-cores through a mechanical structure or a mode of combining the mechanical structure and resin to obtain the complete single fan blade core.
5. The manufacturing method according to any one of claims 1 to 4, characterized in that the printing material used by the 3D printer comprises at least: polylactide PLA, acrylonitrile-butadiene-styrene copolymer ABS, polyamide PA, photosensitive resin or a composite material of the materials.
6. The manufacturing method of claim 5, wherein the 3D printer is printed in a manner that includes at least one of: melt extrusion, photocuring and laser sintering.
7. The manufacturing method according to any one of claims 1 to 4, characterized in that the printed structure comprises at least: a truss structure or a lattice structure.
8. A fan blade sandwich is characterized by being manufactured by the manufacturing method of the fan blade sandwich of any one of claims 1 to 7.
9. A method of manufacturing a fan blade, comprising:
manufacturing the fan blade sandwich according to the manufacturing method of the fan blade sandwich of any one of claims 1 to 7;
and glass fiber reinforced plastics are respectively arranged on the inner side and the outer side of the fan blade sandwich.
10. A fan blade manufactured by the method for manufacturing a fan blade according to claim 9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011607937.7A CN114683531A (en) | 2020-12-30 | 2020-12-30 | Fan blade, fan blade sandwich and manufacturing method thereof |
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| CN202011607937.7A CN114683531A (en) | 2020-12-30 | 2020-12-30 | Fan blade, fan blade sandwich and manufacturing method thereof |
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