CN116353101A - Blade, manufacturing method thereof and aircraft - Google Patents

Blade, manufacturing method thereof and aircraft Download PDF

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Publication number
CN116353101A
CN116353101A CN202310316890.6A CN202310316890A CN116353101A CN 116353101 A CN116353101 A CN 116353101A CN 202310316890 A CN202310316890 A CN 202310316890A CN 116353101 A CN116353101 A CN 116353101A
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China
Prior art keywords
blade
weight
skin
dry cloth
core
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CN202310316890.6A
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Chinese (zh)
Inventor
张飞
王星星
杨冰
黄锦腾
肖炜
彭宇
张锐
秦慧
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Guangdong Huitian Aerospace Technology Co Ltd
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Guangdong Huitian Aerospace Technology Co Ltd
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Priority to CN202310316890.6A priority Critical patent/CN116353101A/en
Publication of CN116353101A publication Critical patent/CN116353101A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/28Shaping operations therefor
    • B29C70/40Shaping or impregnating by compression not applied
    • B29C70/42Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles
    • B29C70/46Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using matched moulds, e.g. for deforming sheet moulding compounds [SMC] or prepregs
    • B29C70/48Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using matched moulds, e.g. for deforming sheet moulding compounds [SMC] or prepregs and impregnating the reinforcements in the closed mould, e.g. resin transfer moulding [RTM], e.g. by vacuum
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/28Shaping operations therefor
    • B29C70/54Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29LINDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00Other particular articles
    • B29L2031/08Blades for rotors, stators, fans, turbines or the like, e.g. screw propellers
    • B29L2031/087Propellers
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/70Wind energy
    • Y02E10/72Wind 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)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)

Abstract

The invention discloses a blade and a manufacturing method thereof as well as an aircraft, wherein the blade comprises an upper skin, a lower skin, a precast beam, a weight-reducing core and polymeric resin, wherein the upper skin is laid on the upper part of the lower skin, and the upper skin and the lower skin are jointly enclosed to form a sealing area; the precast beam and the weight-reducing core are arranged in the sealing area, the weight-reducing core is partially embedded in the precast beam, the polymer resin is filled in the sealing area, and the lower skin, the upper skin, the precast beam and the weight-reducing core are connected into a whole after solidification. The technical scheme of the invention improves the production efficiency of the blade.

Description

Blade, manufacturing method thereof and aircraft
Technical Field
The invention relates to the technical field of propellers, in particular to a blade, a manufacturing method thereof and an aircraft.
Background
At present, domestic conventional propellers are basically manufactured by metal. With the higher requirements of propeller propulsion efficiency, noise reduction effect and weight reduction effect, the composite material of the propeller gradually becomes an industry trend.
For conventional composite blades, conventional manufacturing processes include a molding process and an autoclave process. Because the mould pressing process and the autoclave process both need to carry out resin infiltration in advance on the prefabricated body to form the prepreg, and then lay the prepreg layer by layer in the mould cavity, the laying difficulty is high, the laying process is tedious, the manual laying is mainly relied on, the laying efficiency is low, and the corresponding required curing time is long. And the local thickness of the blade is large, high-efficiency production cannot be realized by adopting the quick prepreg, so that the overall production beat of the blade is slow, and the production efficiency is low.
Disclosure of Invention
The invention mainly aims to provide a blade, and aims to improve the production efficiency of the blade.
To achieve the above object, the present invention provides a blade comprising:
a lower skin;
the upper skin is laid on the upper part of the lower skin, and the upper skin and the lower skin are jointly enclosed to form a sealing area;
the precast beam and the weight-reducing core are arranged in the sealing area, and the weight-reducing core is partially embedded in the precast beam; and
and the polymer resin is filled in the sealing area and enables the lower skin, the upper skin, the precast beam and the weight-reducing core to be connected into a whole after solidification.
Optionally, the weight-reduction core has a density greater than or equal to 100kg/m3 and less than or equal to 200kg/m3; and/or the number of the groups of groups,
the weight-reducing core adopts a balsawood core material.
Optionally, the upper skin and the lower skin are configured as a first fiber dry cloth;
the precast beam comprises second fiber dry cloth wrapped on the weight-reducing core.
Optionally, the material of the first fiber dry cloth is the same as the material of the second fiber dry cloth.
Optionally, the shape of the precast beam is any one of an i shape, a C shape and a Z shape.
The invention also provides a manufacturing method of the blade, which comprises the following steps:
paving a lower skin on the surface of a lower die cavity of a lower die, positioning and placing a precast beam and a second core part of a weight-reducing core on the lower skin, and paving an upper skin on the surface of an upper die cavity of an upper die;
closing the upper die and the lower die to form a closed die cavity between the upper die cavity and the lower die cavity, and carrying out vacuum treatment on the closed die cavity through an exhaust hole;
injecting the polymeric resin through the glue injection hole;
heating to cure the polymeric resin, thereby integrating the lower skin, the upper skin, the precast beam, and the weight-reduction core.
Optionally, the upper skin and the lower skin are both woven or warp-knitted through first fiber precursors to form first fiber dry cloth, the first fiber dry cloth is cut and manufactured according to a preset shape, the precast beam is woven or warp-knitted through second fiber precursors to form second fiber dry cloth, and the second fiber dry cloth is manufactured according to a preset shape and is filled by a preset weight-reducing core.
Optionally, the first fiber dry cloth is configured as a carbon fiber dry cloth;
the second fiber dry cloth is configured as carbon fiber dry cloth or glass fiber dry cloth.
Optionally, the weight-reduction core has a density greater than or equal to 100kg/m3 and less than or equal to 200kg/m3; and/or the number of the groups of groups,
the weight-reducing core adopts a balsawood core material.
Optionally, the vacuum degree after the vacuum treatment in the closed die cavity is less than or equal to-0.09 Mpa.
Optionally, the step of injecting the polymeric resin through the injection hole includes:
injecting the polymeric resin through the injecting hole at an injection pressure of greater than 5Mpa for greater than 1 minute and less than 20 minutes.
Optionally, the polymeric resin is cured such that less than 20 minutes is taken for the lower skin, the upper skin, the precast beam, and the weight-reduction core to be integrally connected.
Optionally, after the step of heating to cure the polymer resin to integrally join the lower skin, the upper skin, the precast beam, and the weight-reduction core, the method of manufacturing the blade further includes the steps of:
and polishing the surface of the cured blade by adopting a sand blowing or polishing process.
The invention also proposes an aircraft comprising a blade as described above; and/or a blade manufactured by the blade manufacturing method as described above.
According to the technical scheme, the upper skin and the lower skin are paved respectively, the upper skin is paved on the upper part of the lower skin, and the upper skin and the lower skin are jointly enclosed to form a sealing area; the precast beam and the weight-reducing core are arranged in the sealing area, and the weight-reducing core is partially embedded into the precast beam; the polymer resin is filled in the sealing area, and after curing, the lower skin, the upper skin, the precast beam and the weight-reducing core are connected into a whole. In this embodiment, the blade is manufactured by using an RTM (resin transfer molding) process, and the upper skin and the lower skin are both made of dry cloth or felt, and the prepreg is not required, so that the upper skin and the lower skin are conveniently paved and adhered. And need not to lay the subsides layer by layer, as long as will subtract heavy core and precast beam to fix in the position of predetermineeing, then can close the membrane, carry out the injection of polymer resin, the polymer resin solidification to with lower covering, last covering, precast beam and subtract heavy core shaping structure as an organic whole, obtain the blade, thereby reduce the process of blade, improve the takt of blade, realize mass production. And the prefabricated beam is arranged at the thicker position, so that the strength of the blade can be further increased.
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 required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of an embodiment of a blade according to the present invention;
FIG. 2 is a schematic view of a mold in an embodiment of a method of manufacturing a blade according to the present invention;
FIG. 3 is a flow chart of an embodiment of a method of manufacturing the blade of FIG. 2.
Reference numerals illustrate:
Figure BDA0004151528790000031
Figure BDA0004151528790000041
the achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. 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.
It should be noted that, if directional indications (such as up, down, left, right, front, and rear … …) are included in the embodiments of the present invention, the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.
In addition, if there is a description of "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" as it appears throughout is meant to include three side-by-side schemes, for example, "a and/or B", including a scheme, or B scheme, or a scheme that is satisfied by both a and B. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.
The present invention proposes a blade 100.
In the embodiment of the present invention, as shown in fig. 1, the blade 100 includes an upper skin 120, a lower skin 110, a precast beam 130, a weight-reducing core 140 and a polymeric resin 150, wherein the upper skin 120 is laid on the upper portion of the lower skin 110, and the upper skin 120 and the lower skin 110 jointly enclose a sealing area 121; the precast beam 130 and the weight-reducing core 140 are both arranged in the sealing area 121, and the weight-reducing core 140 is partially embedded in the precast beam 130; the polymeric resin 150 is poured into the sealing region 121 and, after curing, integrally connects the lower skin 110, the upper skin 120, the precast beams 130, and the weight-reduction core 140.
Specifically, the upper skin 120 is disposed on the upper portion of the blade 100, the lower skin 110 is disposed on the lower portion of the blade 100, and the upper skin 120 and the lower skin 110 are sealed around each other for placing the weight-reducing core 140 and the precast beam 130. Because of the locally thicker locations or locations of higher strength required of the blade 100, precast beams 130 need to be provided at these locations to enhance the overall strength of the blade 100. While the weight-reduction core 140 is mostly a lightweight material, thereby reducing the overall mass of the blade 100. In this embodiment, the blade 100 is manufactured by using an RTM (resin transfer molding) process, and the upper skin 120 and the lower skin 110 are made of dry cloth or felt, so that prepregs are not needed, thereby facilitating the laying of the upper skin 120 and the lower skin 110. And need not to lay down on layers, as long as the weight-reducing core 140 and the precast beam 130 are fixed in the preset position, then the film can be assembled, the injection of the polymer resin 150 is carried out, and the polymer resin 150 is solidified, so that the lower skin 110, the upper skin 120, the precast beam 130 and the weight-reducing core 140 are molded into an integral structure, and the blade 100 is obtained. And having the precast beams 130 at thicker locations can further increase the strength of the blade 100.
According to the technical scheme, the upper skin 120 and the lower skin 110 are respectively paved, the upper skin 120 is paved on the upper part of the lower skin 110, and the upper skin 120 and the lower skin 110 are jointly enclosed to form a sealing area 121; the precast beam 130 and the weight-reducing core 140 are both arranged in the sealing area 121, and the weight-reducing core 140 is partially embedded in the precast beam 130; the polymeric resin 150 is poured into the sealing region 121 and, after curing, integrally connects the lower skin 110, the upper skin 120, the precast beams 130, and the weight-reduction core 140. In this embodiment, the blade 100 is manufactured by using an RTM (resin transfer molding) process, and the upper skin 120 and the lower skin 110 are made of dry cloth or felt, so that prepregs are not needed, thereby facilitating the laying of the upper skin 120 and the lower skin 110. And need not to lay down the subsides layer by layer, as long as with subtracting heavy core 140 and precast beam 130 fixed in the position of predetermineeing, then can close the membrane, carry out the injection of polymer resin 150, polymer resin 150 solidification to with lower skin 110, last skin 120, precast beam 130 and subtract heavy core 140 shaping structure as an organic whole, obtain blade 100, thereby reduce the process of blade 100, improve the takt of blade 100, realize mass production. And having the precast beams 130 at thicker locations can further increase the strength of the blade 100.
In one embodiment, the density of the weight-reducing core 140 is greater than or equal to 100kg/m3 and less than or equal to 200kg/m3. Specifically, since the material of the weight-reducing core 140 is generally foam in the prior art, the compression performance is poor, and it is difficult to withstand high injection pressure. The density of the weight-reducing core 140 is greater than or equal to 100kg/m3 and less than or equal to 200kg/m3, that is, the weight-reducing core 140 is made of a light and high-strength material, so that the compression performance of the weight-reducing core 140 is improved, the weight-reducing core 140 cannot collapse and deform due to the enhancement of injection pressure, the injection speed of the polymer resin 150 is improved, the reaction speed inside the blade 100 is accelerated, the required curing time can be further shortened according to the time-temperature equivalent principle, the production time of the blade 100 is shortened, and the production takt time of the blade 100 is improved.
Preferably, the weight reduction core 140 is a balsawood core.
In one embodiment, the upper skin 120 and the lower skin 110 are configured as a first fiber dry cloth. Thus, the mixed injection is realized, and not only the overall strength of the blade 100 can be enhanced, but also the mass of the blade 100 can be reduced. The first fiber dry cloth can be carbon fiber dry cloth or glass fiber dry cloth, or can be other fiber fabrics such as quartz fiber, polyimide fiber, aramid fiber, basalt fiber, etc.
In another embodiment, the preform beam 130 includes a second fibrous dry cloth wrapped around the weight-loss core 140. That is, the surface of the precast beam 130 is wrapped with the second fiber dry cloth, and the inside thereof is filled with the weight-reducing core 140, thereby not only enhancing the overall strength of the blade 100, but also reducing the mass of the blade 100. The first fiber dry cloth can be carbon fiber dry cloth, and other fiber fabrics such as quartz fiber, polyimide fiber, aramid fiber, basalt fiber and the like can also be adopted.
Further, the material of the first fiber dry cloth is the same as the material of the second fiber dry cloth. Specifically, the first fiber dry cloth and the second fiber dry cloth can both adopt carbon fiber dry cloth, so that the diversity of materials is reduced, and the production beat is improved.
Referring to fig. 1, in an embodiment, the precast beam 130 has any one of an i-shape, a C-shape and a Z-shape. Specifically, as shown in fig. 1, in this embodiment, the prefabricated beam 130 is an i-beam, so as to improve the strength of the weak portion of the blade 100 and improve the overall strength of the blade 100.
The invention also provides a manufacturing method of the blade 100, which comprises the following steps:
paving the lower skin 110 on the lower cavity surface of the lower mold 200, positioning the precast beam 130 and the weight-reducing core 140 on the lower skin 110, and paving the upper skin 120 on the upper cavity surface of the upper mold 200;
closing the upper mold 200 and the lower mold 200 so that the upper mold cavity and the lower mold cavity form a closed mold cavity, and performing vacuum treatment on the closed mold cavity through the vent hole 210;
injecting the polymeric resin 150 through the injection hole 220;
the heating is performed to cure the polymer resin 150 so as to be integrally connected with the lower skin 110, the upper skin 120, the precast beams 130, and the weight-reduction core 140.
Specifically, in the present embodiment, the blade 100 is manufactured using an RTM (resin transfer molding) process, and the mold 200 used in the process generally includes an upper mold 200 and a lower mold 200 that are mutually spliced. Wherein, the lower skin 110 of the precast beam 130 may be laid on the lower cavity surface of the lower mold 200, then the precast beam 130 and the weight-reducing core 140 are positioned on the lower skin 110, and finally the upper skin 120 is laid on the upper cavity surface of the upper mold 200; it is also possible to separately lay and attach the upper skin 120 to the upper cavity surface of the upper mold 200, and then place the preform 130 and the weight-reduction core 140 on the lower skin 110 in position, thereby forming the preform. Then the upper mold 200 and the lower mold 200 are closed, so that the upper mold cavity and the lower mold cavity form a closed mold cavity, the sealing area 121 is formed corresponding to the upper skin 120 and the lower skin 110, and then the closed mold cavity is subjected to vacuum treatment through the exhaust holes 210, so that the vacuum degree in the closed mold cavity is ensured to meet the requirement, the possibility of occurrence of bubbles in the blade 100 is reduced, and the yield of the blade 100 is improved. The polymer resin 150 is injected through the injection holes 220 such that the polymer resin 150 fills the entire cavity, and then the polymer resin 150 is cured, thereby connecting the lower skin 110, the upper skin 120, the precast beam 130, and the weight-loss core 140 into an integral structure, resulting in the blade 100. And the temperature is increased to accelerate the curing of the polymeric resin 150, thereby shortening the curing time of the polymeric resin 150 and accelerating the production efficiency of the blade 100. Wherein, the injecting hole 220 and the vent hole 210 are both disposed on the mold 200 and are mutually communicated, and when the polymeric resin 150 in the mold cavity overflows from the vent hole 210, the injecting is completed.
Before the upper skin 120, the lower skin 110 and the precast beams 130 are laid, they need to be manufactured into a predetermined shape, and in one embodiment, the upper skin 120 and the lower skin 110 are both woven or warp-knitted with first fiber filaments to form a first fiber dry cloth, and cut out of the first fiber dry cloth according to the predetermined shape, and the precast beams 130 are woven or warp-knitted with second fiber filaments to form a second fiber dry cloth, which is manufactured according to the predetermined shape and is filled with the predetermined weight-reduction core 140. Specifically, the upper skin 120 and the lower skin 110 are woven or warp-knitted by the first fiber precursor to form a first fiber dry cloth, and cut to form a preset shape, so that when the upper skin 120 and the lower skin 110 are laid, the upper skin 120 and the lower skin 110 are directly placed on the upper cavity wall and the lower cavity wall respectively, and secondary trimming is not required, thereby improving the production beat of the blade 100. The surface of the precast beam 130 is wrapped with a second fiber dry cloth, and the inside of the precast beam is filled with a weight-reducing core 140, so that the overall strength of the blade 100 can be enhanced and the mass of the blade 100 can be reduced. The first fiber dry cloth can be carbon fiber dry cloth, and other fiber fabrics such as quartz fiber, polyimide fiber, aramid fiber, basalt fiber and the like can also be adopted.
In an embodiment, the first fiber dry cloth is configured as a carbon fiber dry cloth or a glass fiber dry cloth. Specifically, if the first fiber dry cloth is configured as a carbon fiber dry cloth, the first fiber dry cloth is formed by weaving or warp knitting the first fiber precursor; if the first fiber dry cloth is configured as a glass fiber dry cloth, the first fiber dry cloth is formed by weaving first fiber filaments.
In another embodiment, the second fiber dry cloth is configured as a carbon fiber dry cloth. If the second fiber dry cloth is configured as a carbon fiber dry cloth, the second fiber dry cloth is formed by weaving or warp knitting the second fiber precursor.
In one embodiment, the density of the weight-reducing core 140 is greater than or equal to 100kg/m3 and less than or equal to 200kg/m3. Specifically, since the material of the weight-reducing core 140 is generally foam in the prior art, the compression performance is poor, and it is difficult to withstand high injection pressure. The density of the weight-reducing core 140 is greater than or equal to 100kg/m3 and less than or equal to 200kg/m3, that is, the weight-reducing core 140 is made of a light and high-strength material, so that the compression performance of the weight-reducing core 140 is improved, the weight-reducing core 140 cannot collapse and deform due to the enhancement of injection pressure, the injection speed of the polymer resin 150 is improved, the reaction speed inside the blade 100 is accelerated, the required curing time can be further shortened according to the time-temperature equivalent principle, the production time of the blade 100 is shortened, and the production takt time of the blade 100 is improved.
Preferably, the weight reduction core 140 is a balsawood core.
In one embodiment, the vacuum level after vacuum treatment in the closed mold cavity is less than or equal to-0.09 Mpa. Specifically, if the vacuum degree after the vacuum treatment in the closed cavity is greater than-0.09 Mpa, the vacuum degree is too low, and bubbles may occur in the blade 100, thereby affecting the yield of the blade 100.
In one embodiment, the step of injecting the polymeric resin 150 through the injection holes 220 includes:
the polymeric resin 150 is injected through the injection hole 220 at an injection pressure of more than 5Mpa for more than 1 minute and less than 20 minutes. Specifically, the injection pressure of the injection hole 220 is greater than 5Mpa, thereby realizing medium-pressure or high-pressure injection, thereby accelerating the injection speed, so that the injection time is greater than 1 minute and less than 20 minutes. In the prior art, since the material of the weight-reducing core 140 in the blade 100 is generally foam, the compression performance is poor, and it is difficult to bear high injection pressure, the injection speed is slow, generally greater than 30 minutes, and the injection time in the present embodiment is generally greater than 1 minute and less than 20 minutes, so as to accelerate the production speed of the blade 100 and realize mass production.
The reaction speed inside the blade 100 is increased due to the increased injection speed, and the curing time required can be further shortened according to the time-temperature equivalent principle, so that the curing time needs to be shortened. To ensure a reduction in curing time, in one embodiment, the polymeric resin 150 cures such that less than 20 minutes is taken to join the lower skin 110, the upper skin 120, the precast beams 130, and the weight-reduction core 140 together. Specifically, the curing time of the polymeric resin 150 is effectively shortened by increasing the temperature, so that the processing process of the blade 100 conforms to the time-temperature equivalent principle, and the yield is improved.
After the step of heating to cure the polymer resin and thereby connect the lower skin 110, the upper skin 120, the precast beam 130 and the weight-reduction core 140 together, the surface bonding force of the blade 100 is improved when the blade 100 is subjected to a subsequent coating process after the processing is completed, so in this embodiment, a sand blowing or polishing process is used to polish the surface of the cured blade 100.
The present invention also provides an aircraft, the manufacturing method of the blade 100 includes the blade 100 and/or the blade 100 manufactured by adopting the manufacturing method of the blade 100, and the specific structure of the blade 100 refers to the above embodiment, and since the manufacturing method of the blade 100 adopts all the technical solutions of all the embodiments, at least the technical solutions of the embodiments have all the beneficial effects, and will not be described in detail herein.
The foregoing description of the preferred embodiments of the present invention should not be construed as limiting the scope of the invention, but rather should be understood to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the following description and drawings or any application directly or indirectly to other relevant art(s).

Claims (14)

1. A blade, comprising:
a lower skin;
the upper skin is laid on the upper part of the lower skin, and the upper skin and the lower skin are jointly enclosed to form a sealing area;
the precast beam and the weight-reducing core are arranged in the sealing area, and the weight-reducing core is partially embedded in the precast beam; and
and the polymer resin is filled in the sealing area and enables the lower skin, the upper skin, the precast beam and the weight-reducing core to be connected into a whole after solidification.
2. The blade of claim 1, wherein the weight-reducing core has a density greater than or equal to 100kg/m3 and less than or equal to 200kg/m3; and/or the number of the groups of groups,
the weight-reducing core adopts a balsawood core material.
3. The blade of claim 1, wherein the upper skin and the lower skin are configured as a first fiber dry cloth;
the precast beam comprises second fiber dry cloth wrapped on the weight-reducing core.
4. A blade according to claim 3, wherein the material of the first fibrous dry cloth is arranged the same as the material of the second fibrous dry cloth.
5. The blade according to claim 1, wherein the preform beam has any one of an i-shape, a C-shape and a Z-shape.
6. A method of manufacturing a blade, comprising the steps of:
paving a lower skin on the surface of a lower die cavity of a lower die, positioning a precast beam and a weight-reducing core on the lower skin, and paving an upper skin on the surface of an upper die cavity of an upper die;
closing the upper die and the lower die to form a closed die cavity between the upper die cavity and the lower die cavity, and carrying out vacuum treatment on the closed die cavity through an exhaust hole;
injecting the polymeric resin through the glue injection hole;
heating to cure the polymeric resin, thereby integrating the lower skin, the upper skin, the precast beam, and the weight-reduction core.
7. The method of manufacturing a blade according to claim 6, wherein the upper skin and the lower skin are both woven or warp-knitted with first fiber strands to form a first fiber dry cloth, and cut out of the first fiber dry cloth according to a predetermined shape, the preform beam is woven or warp-knitted with second fiber strands to form a second fiber dry cloth, and the second fiber dry cloth is formed according to a predetermined shape and filled with a predetermined weight-reduction core.
8. The method of manufacturing a blade according to claim 7, wherein the first fiber dry cloth is configured as a carbon fiber dry cloth;
the second fiber dry cloth is configured as carbon fiber dry cloth or glass fiber dry cloth.
9. The method of manufacturing a blade according to claim 7, wherein the density of the weight-reducing core is 100kg/m3 or more and 200kg/m3 or less; and/or the number of the groups of groups,
the weight-reducing core adopts a balsawood core material.
10. The method of manufacturing a blade according to claim 6, wherein the vacuum degree after the vacuum treatment in the closed cavity is less than or equal to-0.09 Mpa.
11. The method of manufacturing a blade according to claim 6, wherein the step of injecting the polymer resin through the injection hole comprises:
injecting the polymeric resin through the injecting hole at an injection pressure of greater than 5Mpa for greater than 1 minute and less than 20 minutes.
12. The method of manufacturing a blade according to claim 11, wherein the polymeric resin is cured so that a time taken for joining the lower skin, the upper skin, the precast beam, and the weight-reduction core together is less than 20 minutes.
13. The method of manufacturing a blade according to claim 6, wherein after the step of heating to cure the polymer resin so as to join the lower skin, the upper skin, the precast beam, and the weight-reduction core together, the method of manufacturing a blade further comprises the steps of:
and polishing the surface of the cured blade by adopting a sand blowing or polishing process.
14. An aircraft comprising a blade according to any one of claims 1 to 5; and/or a blade manufactured by the manufacturing method of a blade according to any one of claims 6 to 13.
CN202310316890.6A 2023-03-28 2023-03-28 Blade, manufacturing method thereof and aircraft Pending CN116353101A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN118003666A (en) * 2024-04-10 2024-05-10 西安羚控电子科技有限公司 Forming process of flying device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN118003666A (en) * 2024-04-10 2024-05-10 西安羚控电子科技有限公司 Forming process of flying device

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