CN212838183U - Composite material blade with high-strength blade root - Google Patents
Composite material blade with high-strength blade root Download PDFInfo
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- CN212838183U CN212838183U CN201922110701.1U CN201922110701U CN212838183U CN 212838183 U CN212838183 U CN 212838183U CN 201922110701 U CN201922110701 U CN 201922110701U CN 212838183 U CN212838183 U CN 212838183U
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- 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
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The utility model discloses a composite material blade with high-strength blade root, except the blade root, the upper and lower cloth blanks at other positions, such as short, middle long and long, are sequentially wrapped and fixed in the upper and lower die cloth layer accommodating grooves of the foam core from inside to outside according to the sequence of short, middle long and long; the short, middle-long and long lower cloth blanks at the root of the foam core wrap the root of the foam core for a circle, the butt joint gaps of all layers are mutually staggered, and the short, middle-long and long upper cloth blanks are sequentially inserted between the adjacent two layers of the short, middle-long and long lower cloth blanks from inside to outside according to the sequence of the short, middle-long and long; the front edge ends of the upper cloth blank and the lower cloth blank of the connecting body of the covering cloth layer are integrated, the lower cloth blank wrapping the rear edge end of the whole blade can be upwards lapped on the upper cloth blank, the blade root of the lower cloth blank can wrap the blade root for a circle, and the blade root of the upper cloth blank is inserted between the two adjacent layers of the lower cloth blank. The utility model discloses the blade root resistance to compression, the bending strength height of blade, non-deformable has improved the life of blade greatly.
Description
Technical Field
The utility model relates to a combined material blade of high strength blade root.
Background
With the development of national economy, the application of the composite material is more and more extensive, and the composite material becomes a main raw material of the fan blade nowadays. For example, the fan blade of the prilling tower is made of pre-impregnated carbon fiber cloth and a foam core; still other composite blades are made with pre-impregnated fiberglass cloth and a foam core. The composite material blades are formed by die pressing and high-temperature curing of a steel die, and are light in weight and attractive in appearance. The blade root of the fan blade is cylindrical, and the blade root of the fan blade of the granulation tower is cylindrical with the diameter of 60mm and the length of 80 mm. The metal mold of the blade is divided into an upper mold and a lower mold, and the blade root of the upper mold and the blade root of the lower mold are an upper semicircle and a lower semicircle. The conventional processing method of the fan blade comprises the following steps: an upper cloth blank and a lower cloth blank are respectively laid in the upper die and the lower die, and the upper die and the lower die are surrounded on the foam core, so that the upper cloth blank and the lower cloth blank are butted to form the fan blade. Because the upper cloth blank and the lower cloth blank are butted, the fiber yarns of the upper cloth blank and the lower cloth blank are disconnected at the butted position, the force cannot be transmitted fully, the compression strength and the bending strength at the blade root are weakened, the blade root is easy to deform, and the service life of the blade is shortened.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the above-mentioned problem that exists among the prior art, provide a combined material blade of high strength blade root, the resistance to compression, the bending strength of the blade root department of this combined material blade are high, and non-deformable has improved the life of blade greatly.
In order to achieve the above object, the technical solution of the present invention is: in order to achieve the above object, the technical solution of the present invention is: a composite material blade with a high-strength blade root comprises a foam core, an upper die cloth layer, a lower die cloth layer and a skin cloth layer, wherein the upper die cloth layer and the lower die cloth layer are made of a plurality of layers of pre-impregnated carbon fiber cloth or pre-impregnated glass fiber reinforced plastic fiber cloth; the blade root of the foam core is a cylinder, the blade body is a flat sheet shape which becomes thinner gradually from front to back, and an accommodating groove for an upper die cloth layer and a lower die cloth layer is arranged on the blade body; the upper and lower die cloth layers comprise 5-15 layers of short upper and lower cloth blanks with the length of 30-35% of the blade length, 5-10 layers of middle and short upper and lower cloth blanks with the length of 45-55% of the blade length, 5-10 layers of middle and long upper and lower cloth blanks with the length of 65-75% of the blade length and 5-10 layers of long upper and lower cloth blanks with the whole blade length; the short lower cloth blank, the middle long lower cloth blank and the long lower cloth blank are T-shaped, and the large end of the T-shaped is matched with the length and the outer diameter of the blade root; except the blade root, 5-15 layers of short upper cloth blanks and short lower cloth blanks, 5-10 layers of middle upper cloth blanks and long lower cloth blanks and 5-10 layers of long upper cloth blanks and long lower cloth blanks are sequentially wrapped and fixed in the accommodating grooves of the upper and lower foam core cloth layers from inside to outside according to the sequence of the short, middle long and long; the short lower cloth blank, the middle long lower cloth blank and the long lower cloth blank at the root of the foam core wrap the root of the foam core for a circle, the butt joint gaps of all layers are mutually staggered, and the short upper cloth blank, the middle long upper cloth blank and the long upper cloth blank are sequentially inserted between two adjacent layers of the short lower cloth blank, the middle long lower cloth blank and the long lower cloth blank from inside to outside according to the sequence of short, middle long and long; the covering cloth layer comprises 5-10 layers of connected upper and lower cloth blanks, the front edge ends of the connected upper and lower cloth blanks are integrated, the lower cloth blank wrapping the rear edge end of the whole blade can be upwards lapped on the upper cloth blank, the lapping length is not less than 30mm, the blade root of the lower cloth blank can wrap a blade root circle, the butt joint gaps of the layers are staggered, and the blade root of the upper cloth blank is inserted between two adjacent layers of the lower cloth blank.
A manufacturing method of the composite material blade with the high-strength blade root comprises the following steps:
(1) selecting an upper die and a lower die according to the actual shape and size requirements of the blade, manufacturing the foam core, manufacturing 5-15 layers of the short upper cloth blanks and the short lower cloth blanks, 5-10 layers of the middle short upper cloth blanks and the middle short lower cloth blanks, 5-10 layers of the middle long upper cloth blanks and the middle long lower cloth blanks, 5-10 layers of the long upper cloth blanks and the long lower cloth blanks and 5-10 layers of the connected upper cloth blanks and the connected lower cloth blanks;
(2) paving 5-10 layers of upper and lower cloth blanks of the connected body in a lower die, and reserving a part of protective film of the connected upper and lower cloth blanks which is longer than the lower die; then sequentially laying and fixing 5-10 layers of long lower cloth blanks, 5-10 layers of middle-short lower cloth blanks and 5-15 layers of short lower cloth blanks on the lower cloth blanks of the connected upper and lower cloth blanks of the lower die to form lower die cloth layers, wherein the large ends of the long, middle-short and short lower cloth blanks are longer than partial protective film reservation of the lower die; then placing the prepared foam core in a laid lower mold cloth layer, wherein the lower mold cloth layer is positioned in a containing groove of the lower mold cloth layer of the foam core; then sequentially laying and fixing the short, medium long and long upper cloth blanks at the blade root according to the sequence of the short, medium long and the sequence of the lower cloth blank layer and the upper cloth blank layer at the blade root, wherein the parts of the short, medium long and long lower cloth blanks which are longer than the lower die are laid and fixed in the containing grooves of the upper cloth layer of the foam core to form the upper cloth layer; the large ends of the short, middle, short, middle and long lower fabric blanks are longer than the parts of the lower die for butt joint, and butt joints are staggered; finally, sequentially laying and applying parts of the 5-10 layers of connected upper and lower cloth blanks which are longer than the lower die on the foam core from inside to outside and at the blade root according to the sequence of a layer of lower cloth blank and a layer of upper cloth blank, wherein each layer of lower cloth blank is upwards wrapped at the rear edge of the blade, the wrapping length is not less than 30mm, the lower cloth blanks at the blade root are butted, and the butt joints are mutually staggered;
(4) and buckling the upper die on the lower die, closing the die, putting the die into a press, curing and forming at the high temperature of 130-180 ℃, and taking down the upper die and the lower die after forming.
The utility model discloses a big tip parcel of short, well long and the long cloth base down on the lower mould cloth layer of combined material blade root department is to short, well long or long between the cloth base each layer, and staggers each other in the butt joint gap, and the transmission of power has obtained abundant assurance, has strengthened the joint strength of blade root department, has improved resistance to compression, the bending strength of blade root department, and blade non-deformable has improved the life of blade greatly.
Drawings
Fig. 1 is a schematic perspective view of a blade according to the present invention;
FIG. 2 is a cross-sectional view AA of FIG. 1;
FIG. 3 is a cross-sectional view of BB of FIG. 1;
FIG. 4 is a schematic structural view of the present invention showing the blade root paving in the upper and lower molds;
FIG. 5 is an expanded view of the upper and lower cloth blanks connected to each other in the blade of the present invention;
FIG. 6 is an expanded view of a middle and long cloth blank of the blade of the present invention;
FIG. 7 is an expanded view of a middle and long cloth blank of the blade of the present invention;
FIG. 8 is an expanded view of a middle, short and lower cloth of the blade of the present invention;
FIG. 9 is an expanded view of the lower cloth of the blade of the present invention;
FIG. 10 is an expanded view of the middle and upper cloth of the blade of the present invention;
FIG. 11 is an expanded view of a middle and long upper cloth blank of the blade of the present invention;
FIG. 12 is an expanded view of the middle and short upper cloth blanks of the blade of the present invention;
fig. 13 is an expanded schematic view of the cloth blank on the blade middle and short.
Detailed Description
The invention is further described with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1 to 13, the composite blade of the present embodiment includes a foam core 11, upper and lower fabric layers 19, 20 made of a plurality of layers of carbon fiber prepreg cloth (or glass fiber reinforced plastic prepreg cloth), and a skin fabric layer 1. The blade root 17 of the foam core 11 is a cylinder, and the blade body 18 is a flat sheet shape gradually thinning from front to back, and is provided with accommodating grooves 12 and 13 of an upper die cloth layer and a lower die cloth layer. The upper and lower cloth layers 19 and 20 include 5-15 short upper and lower cloth blanks 10 and 5 having a blade length of 30-35%, 5-10 middle upper and lower cloth blanks 9 and 4 having a blade length of 45-55%, 5-10 middle upper and lower cloth blanks 8 and 3 having a blade length of 65-75%, and 5-10 long upper and lower cloth blanks 7 and 2 having the entire blade length. The short lower cloth blank 5, the middle short lower cloth blank 4, the middle long lower cloth blank 3 and the long lower cloth blank 2 are T-shaped, and the length and the outer diameter of the large end of the T-shaped are matched with those of the blade root 17. Except the blade root 17, 5 to 15 layers of short upper cloth blanks and 5 lower cloth blanks 10 and 5, 5 to 10 layers of middle short upper cloth blanks and 4, 5 to 10 layers of middle long upper cloth blanks and 3, and 5 to 10 layers of long upper cloth blanks and 5 to 10 layers of long lower cloth blanks 7 and 2 are sequentially wrapped and fixed in the accommodating grooves 12 and 13 of the upper and lower foam core cloth layers from inside to outside according to the sequence of the short, the middle long and the long. The short lower cloth blank 5, the middle short lower cloth blank 4, the middle long lower cloth blank 3 and the long lower cloth blank 2 at the position of a blade root 17 of the foam core 11 wrap the blade root 17 of the foam core by a circle, the butt joint gaps 14 of all layers are mutually staggered, and the short upper cloth blank 10, the middle short upper cloth blank 9, the middle long upper cloth blank 8 and the long upper cloth blank 7 are sequentially inserted between two adjacent layers of the short lower cloth blank 5, the middle short lower cloth blank 4, the middle long lower cloth blank 3 and the long lower cloth blank 2 from inside to outside according to the sequence of short, middle long and long. The covering cloth layer 21 comprises 5-10 layers of connected upper and lower cloth blanks 1, the front edge ends of the connected upper and lower cloth blanks 1 are integrated, the lower cloth blank 102 wrapping the rear edge end of the whole blade can be upwards lapped on the upper cloth blank 101, the lapping length 6 is not less than 30mm, the blade root 17 of the lower cloth blank 102 can wrap the blade root 17 for one circle, the butt joint gaps of the layers are staggered, and the blade root 103 of the upper cloth blank 101 is inserted between two adjacent layers of the blade root 104 of the lower cloth blank 102.
A manufacturing method of the composite material blade with the high-strength blade root comprises the following steps:
(1) selecting an upper die 16 and a lower die 15 according to the actual blade shape and size requirements, manufacturing the foam core 11, manufacturing 5-15 layers of the short upper cloth blanks and the short lower cloth blanks 10 and 5, 5-10 layers of the middle upper cloth blanks and the short lower cloth blanks 9 and 4, 5-10 layers of the middle upper cloth blanks and the long lower cloth blanks 8 and 3, 5-10 layers of the long upper cloth blanks and the long lower cloth blanks 7 and 2, and 5-10 layers of the connected upper cloth blanks and the connected lower cloth blanks 1.
(2) The lower cloth blank 102 of the 5-10 layers of connected upper and lower cloth blanks 1 is paved in the lower die 15, and a part of protective film of the connected upper and lower cloth blanks 1, which is longer than the lower die 15, is reserved. And then sequentially paving 5-10 layers of long lower cloth blanks 2, 5-10 layers of middle-long lower cloth blanks 3, 5-10 layers of middle-short lower cloth blanks 4 and 5-15 layers of short lower cloth blanks 5 on the lower cloth blanks 102 of the connected upper and lower cloth blanks 1 of the lower die 15 to form a lower die cloth layer 20, wherein the large ends of the long, middle-short and short lower cloth blanks 7, 8, 9 and 10 are reserved with partial protective films which are longer than the lower die 15. The prepared foam core 11 is then placed in the laid lower mold cloth layer 20, and the lower mold cloth layer 20 is positioned in the receiving groove 13 of the lower mold cloth layer of the foam core. Then, the short, middle long and long upper cloth blanks 10, 9, 8 and 7, and the short, middle long and long lower cloth blanks 5, 4, 3 and 2, which are longer than the lower die 15, are sequentially laid and fixed in the accommodating grooves 13 of the upper cloth layer of the foam core 11 in the order of short, middle long and in the order of one lower cloth blank and one upper cloth blank at the blade root 17 to form an upper cloth layer 19. The large ends of the short, medium and long lower fabric blanks 2, 3, 4 and 5 are longer than the part of the lower die 15 and are butted, and the butt seams 14 are staggered. And finally, sequentially laying parts of the 5-10 layers of connected upper and lower cloth blanks 1, which are longer than the lower die 15, on the foam core 11 from inside to outside in sequence and in the sequence of a layer of lower cloth blank and a layer of upper cloth blank at the blade root 17, wrapping the lower cloth blank 102 upwards at the rear edge of the blade in each layer, wherein the wrapping length is not less than 30mm, the lower cloth blanks 102 at the blade root 17 are butted, and the butt seams are staggered mutually.
(4) And buckling the upper die 16 on the lower die 15, closing the dies, putting the dies into a press, curing and forming at the high temperature of 130-180 ℃, and taking down the upper die 16 and the lower die 15 after forming.
Naturally, the invention also relates to other embodiments, and those skilled in the art can make corresponding changes and modifications according to the invention without departing from the spirit and substance of the invention, and these corresponding changes and modifications should be considered as improvements in the equivalent technology, and fall within the scope of protection of the claims of the invention.
Claims (1)
1. A composite material blade with a high-strength blade root comprises a foam core, an upper die cloth layer, a lower die cloth layer and a skin cloth layer, wherein the upper die cloth layer and the lower die cloth layer are made of a plurality of layers of pre-impregnated carbon fiber cloth or pre-impregnated glass fiber reinforced plastic fiber cloth; the blade root of the foam core is a cylinder, the blade body is a flat sheet shape which becomes thinner gradually from front to back, and an accommodating groove for an upper die cloth layer and a lower die cloth layer is arranged on the blade body; the method is characterized in that: the upper and lower die cloth layers comprise 5-15 layers of short upper and lower cloth blanks with the length of 30-35% of the blade length, 5-10 layers of middle and short upper and lower cloth blanks with the length of 45-55% of the blade length, 5-10 layers of middle and long upper and lower cloth blanks with the length of 65-75% of the blade length and 5-10 layers of long upper and lower cloth blanks with the whole blade length; the short lower cloth blank, the middle long lower cloth blank and the long lower cloth blank are T-shaped, and the large end of the T-shaped is matched with the length and the outer diameter of the blade root; except the blade root, 5-15 layers of short upper cloth blanks and short lower cloth blanks, 5-10 layers of middle upper cloth blanks and long lower cloth blanks and 5-10 layers of long upper cloth blanks and long lower cloth blanks are sequentially wrapped and fixed in the accommodating grooves of the upper and lower foam core cloth layers from inside to outside according to the sequence of the short, middle long and long; the short lower cloth blank, the middle long lower cloth blank and the long lower cloth blank at the root of the foam core wrap the root of the foam core for a circle, the butt joint gaps of all layers are mutually staggered, and the short upper cloth blank, the middle long upper cloth blank and the long upper cloth blank are sequentially inserted between two adjacent layers of the short lower cloth blank, the middle long lower cloth blank and the long lower cloth blank from inside to outside according to the sequence of short, middle long and long; the covering cloth layer comprises 5-10 layers of connected upper and lower cloth blanks, the front edge ends of the connected upper and lower cloth blanks are integrated, the lower cloth blank wrapping the rear edge end of the whole blade can be upwards lapped on the upper cloth blank, the lapping length is not less than 30mm, the blade root of the lower cloth blank can wrap a blade root circle, the butt joint gaps of the layers are staggered, and the blade root of the upper cloth blank is inserted between two adjacent layers of the blade root of the lower cloth blank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922110701.1U CN212838183U (en) | 2019-11-30 | 2019-11-30 | Composite material blade with high-strength blade root |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922110701.1U CN212838183U (en) | 2019-11-30 | 2019-11-30 | Composite material blade with high-strength blade root |
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| CN212838183U true CN212838183U (en) | 2021-03-30 |
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| CN201922110701.1U Active CN212838183U (en) | 2019-11-30 | 2019-11-30 | Composite material blade with high-strength blade root |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111188740A (en) * | 2019-11-30 | 2020-05-22 | 惠阳航空螺旋桨有限责任公司 | Composite material blade with high-strength blade root and manufacturing method thereof |
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- 2019-11-30 CN CN201922110701.1U patent/CN212838183U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111188740A (en) * | 2019-11-30 | 2020-05-22 | 惠阳航空螺旋桨有限责任公司 | Composite material blade with high-strength blade root and manufacturing method thereof |
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