CN217197269U - Layered composite component and wind power blade with same - Google Patents
Layered composite component and wind power blade with same Download PDFInfo
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- CN217197269U CN217197269U CN202220370913.2U CN202220370913U CN217197269U CN 217197269 U CN217197269 U CN 217197269U CN 202220370913 U CN202220370913 U CN 202220370913U CN 217197269 U CN217197269 U CN 217197269U
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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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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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Abstract
The utility model relates to a stratiform composite member and have this stratiform composite member's wind-powered electricity generation blade, stratiform composite member includes: an ultra-high molecular weight polyethylene outer layer and an ethylene propylene diene monomer rubber layer; the ethylene propylene diene monomer rubber layer and the ultra-high molecular weight polyethylene outer layer are directly bonded into a whole, the opposite surface of the ethylene propylene diene monomer rubber layer facing the ultra-high molecular weight polyethylene outer layer is an external bonding surface of the layered composite member, and the total thickness of the layered composite member is 0.5-1.5 mm. The ethylene propylene diene monomer rubber layer of the layered composite component can directly bond the ultra-high molecular weight polyethylene outer layer and other components, such as the main body part of the wind power blade, so that other adhesives or bonding layers are omitted, the layered composite component is good in protection effect, strong in weather resistance, economical and environment-friendly, and suitable for large-scale and continuous production.
Description
Technical Field
The utility model belongs to polymer stratiform composite member field especially relates to an ultra high molecular weight polyethylene stratiform composite member and have this stratiform composite member's wind-powered electricity generation blade.
Background
The ultra-high molecular weight polymer is a high molecular material with extremely high molecular weight, has excellent comprehensive performance, and particularly has excellent performance which is not possessed by common high molecular materials. For example, ultra-high molecular weight polyethylene (UHMWPE) is a novel thermoplastic engineering material with excellent properties such as impact resistance, wear resistance, self-lubricity, nontoxicity, chemical inertness, low temperature resistance, etc., and is widely used in the fields of textiles, paper, food, chemical engineering, packaging, construction, medical treatment, military, etc.
The wind power blade is one of core components of the wind driven generator, and the good design, reliable quality and excellent performance of the wind power blade are determining factors for ensuring the normal and stable operation of the wind turbine generator. With the trend of large-scale wind power blades, the length of a main flow model can reach 90 meters, and the linear speed of the blade tip of the wind power blade in the running process can reach 100 m/s. Under such high speed, the wind power blade, especially the front edge part of the blade can be corroded by sand, smoke and raindrops from the air, so that the surface protection material is abraded, and then the phenomenon that sand holes or even adhesive is worn through appears on the base material of the blade, so that the pneumatic performance of the blade is reduced, the power generation efficiency is influenced, and even the blade is broken or broken, and therefore, the protection measures are very necessary to be taken on the front edge part of the blade.
At present, the most widely applied protection aspect of wind power blades is coating protection. According to the performance indexes of the coating: strong adhesive force, certain flexibility, strong wear resistance, impact resistance, weather resistance, surface smoothness and the like. The currently more ideal coatings are polyurethane type coatings, acrylic coatings, silicone resin coatings and fluorocarbon polymer coatings. However, to date, no coating has been provided that fully satisfies the full performance of blade protection. And require multiple maintenance throughout the service life of the wind blade.
In addition, the polyurethane film is a commonly used protective film material at present, but is limited by the polarity property of the material, is easy to hydrolyze during service, has poor anti-fouling and anti-icing capabilities, and is difficult to match the service life of the wind power blade.
The application of the ultra-high molecular weight polyethylene with excellent comprehensive performance to the production and protection of wind power blades becomes a hot point in the prior art. However, the ultrahigh molecular weight polyethylene has poor processability, and the method of adding various additives is usually adopted in the field to reduce the molecular weight so as to facilitate molding, but the reduction of the molecular weight easily causes the reduction of the comprehensive performance, and cannot meet the use requirements of products under severe conditions such as wind power blades; or discontinuous, inefficient, shaping to maintain high molecular weight, but difficult to produce on a large scale and in a continuous manner. In addition, the poor bonding performance of the ultra-high molecular weight polyethylene greatly limits the matching and wide application of the material and other materials, and a plurality of adhesives are used by the technicians in the field to obtain a satisfactory bonding effect, but the common bonding mode is difficult to realize the stable bonding of the ultra-high molecular weight polyethylene and other materials, so the achievement is few.
In summary, on the basis of ensuring the comprehensive performance of the ultra-high molecular weight polyethylene, it is a technical problem to be solved in the art to endow the ultra-high molecular weight polyethylene film or the composite film thereof with good adhesive property with other materials.
SUMMERY OF THE UTILITY MODEL
To the defect that exists among the above-mentioned prior art, the utility model aims to provide a stratiform composite member, it can be used to wind-powered electricity generation blade.
Specifically, the layered composite structural member includes: an ultra-high molecular weight polyethylene outer layer and an ethylene propylene diene rubber layer; the ethylene propylene diene monomer rubber layer and the ultra-high molecular weight polyethylene outer layer are directly bonded into a whole, the opposite surface of the ethylene propylene diene monomer rubber layer facing the ultra-high molecular weight polyethylene outer layer is an external bonding surface of the layered composite member, and the total thickness of the layered composite member is 0.5-1.5 mm.
Further, the thickness of the ultra-high molecular weight polyethylene outer layer is 0.3 to 0.8mm, preferably 0.4 to 0.6 mm. Wherein the molecular weight of the ultra-high molecular weight polyethylene is more than 350 ten thousand.
Further, the thickness of the ethylene propylene diene monomer rubber layer is 0.2-0.8mm, preferably 0.4-0.6 mm. Wherein the ethylene propylene diene monomer is ethylene propylene diene monomer vulcanized twice.
Furthermore, the laminated composite member has a three-dimensional pattern on the external adhesive surface, and the depth of the three-dimensional pattern is 100-200 μm. The three-dimensional pattern can be a single pattern or a combination of multiple patterns, for example, different three-dimensional patterns are adopted in the edge area and the central area of the rubber layer.
Another object of the present invention is to provide a wind power blade having the above layered composite member.
Further, the wind power blade comprises a blade main body part, and the layered composite member is located on the outermost layer of the blade main body part. In particular, the layered composite component is located at least at a leading edge portion of the blade body portion.
The layered composite member of the utility model can obviously improve the wear resistance and the weather resistance of the wind power blade by means of the ultra-high molecular weight polyethylene outer layer. On the other hand, vulcanization is understood to be a crosslinking reaction of the polymer contained in the rubber layer. Rubber is understood to mean vulcanized, i.e. crosslinked, raw rubber, in other words polymerized raw rubber. The layered composite component adopts ethylene propylene diene monomer vulcanized for the second time, specifically, raw rubber is compounded with the ultra-high molecular weight polyethylene film after induced vulcanization, so that the raw rubber can fully infiltrate the surface of the ultra-high molecular weight polyethylene film, and then is fully vulcanized and shaped to form an ethylene propylene diene monomer rubber layer in a product, thereby realizing the connection of the rubber layer to the ultra-high molecular weight polyethylene outer layer through mechanical adhesion.
The utility model discloses, the advantage specifically lies in:
1) the ultra-high molecular weight polyethylene film and the ethylene propylene diene monomer rubber layer are stably bonded through two processes of induced vulcanization and complete vulcanization of the ethylene propylene diene monomer rubber.
2) The utility model discloses a stratiform composite member is because its constitution and structural advantage, when the rolling, can not the adhesion between rubber layer and adjacent, non-joint ultra high molecular weight polyethylene rete, need not to use from type layer or protective layer, economic environmental protection.
3) A three-dimensional pattern is formed on the ethylene propylene diene monomer layer of the composite member through the embossing roller, a mechanical anchoring joint point is provided, and the external bonding performance of the composite member is improved.
4) An extruder with an eccentric core rod is used, the ultra-high molecular weight polyethylene raw material is melted and plasticized by using the extensional rheological action force and is conveyed to an extrusion molding die head based on dynamic extension, a melt forms a large-diameter tubular blank with non-uniform wall thickness in the extrusion molding die head, the part with larger wall thickness of the tubular blank continuously extends and compresses to be uniform or nearly uniform along the circumferential direction under the radial extrusion action of the eccentric rotating core rod, and the extrusion molding die head which gradually converges also has the axial extension force on the raw material, so that the ultra-high molecular weight polyethylene is finally extruded and molded into a tubular blank with uniform wall thickness; the three-dimensional tubular billet is then rolled into a two-dimensional sheet using a set of sheet calender rolls downstream of the extruder. By the mode, the molecular weight of the ultra-high molecular weight polyethylene is kept above 350 ten thousand, the comprehensive performance of the ultra-high molecular weight polyethylene is not damaged, and the ultra-high molecular weight polyethylene is continuously and effectively molded into a two-dimensional sheet.
Drawings
The above and other objects, features and advantages of exemplary embodiments of the present disclosure will become readily apparent from the following detailed description read in conjunction with the accompanying drawings. Several embodiments of the present disclosure are illustrated by way of example, and not by way of limitation, in the figures of the accompanying drawings and in which like reference numerals refer to like or corresponding parts and in which:
FIG. 1 is a schematic diagram showing a two-layer composite membrane structure according to the present invention;
FIG. 2 is a schematic view showing the outer adhesive surface of the EPDM layer according to the present invention;
fig. 3 is a schematic view showing a wind power blade having a composite membrane at a leading edge portion according to the present invention.
Description of reference numerals: 1-an ultra-high molecular weight polyethylene outer layer, 2-an ethylene propylene diene monomer rubber layer and F-a wind power blade.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings.
The term "layered composite structure" as used in the present invention means a part having a layered, composite structure and composition, which part may be either flexible or rigid, depending on the adjustment of the influencing factors such as the thickness of each layer.
As shown in fig. 1-2, a layered composite structural member includes: the laminated composite member comprises an ultrahigh molecular weight polyethylene outer layer 1 and an ethylene propylene diene monomer rubber layer 2, wherein the ethylene propylene diene monomer rubber layer 2 and the ultrahigh molecular weight polyethylene outer layer 1 are directly bonded into a whole, the opposite surface of the ethylene propylene diene monomer rubber layer 2 facing the ultrahigh molecular weight polyethylene outer layer 1 is an external bonding surface of the laminated composite member, and the total thickness of the laminated composite member is 0.5-1.5 mm.
The thickness of the ultra-high molecular weight polyethylene outer layer 1 is 0.3 to 0.8mm, preferably 0.4 to 0.6 mm. Wherein the molecular weight of the ultra-high molecular weight polyethylene is more than 350 ten thousand.
The thickness of the ethylene propylene diene monomer rubber layer 2 is 0.2-0.8mm, preferably 0.4-0.6 mm.
The rubber used in the invention is ethylene propylene diene monomer rubber which is subjected to induced vulcanization and complete vulcanization, and the ultra-high molecular weight polyethylene outer layer 1 and the ethylene propylene diene monomer rubber layer 2 are stably bonded through the process of secondary vulcanization of the ethylene propylene diene monomer rubber.
The opposite surface of the ethylene propylene diene monomer rubber layer 2 facing the ultra-high molecular weight polyethylene outer layer 1 is an external adhesive surface, and is provided with a three-dimensional pattern, and the depth of the three-dimensional pattern is 100-200 mu m. The three-dimensional pattern can be a single pattern or a combination of multiple patterns, for example, different three-dimensional patterns are adopted in the edge area and the central area of the rubber layer.
Preparing an ultra-high molecular weight polyethylene outer layer 1 by using an extruder with an eccentric core rod and combining a sheet calender roll group, melting and plasticizing an ultra-high molecular weight polyethylene raw material by using a stretching rheological action force, and conveying the raw material to an extrusion forming die head based on dynamic extension, wherein a melt forms a large-diameter tubular blank with non-uniform wall thickness in the extrusion forming die head, the large-thickness part of the tubular blank continuously extends and compresses the tubular blank to be uniform or nearly uniform along the circumferential direction under the radial extrusion action of the eccentric rotating core rod, and the extrusion forming die head which gradually converges also has an axial extension force on the raw material, and finally extruding and forming the ultra-high molecular weight polyethylene into a tubular blank with uniform wall thickness; the three-dimensional tubular billet is then rolled into a two-dimensional sheet using a set of sheet calender rolls downstream of the extruder. By the mode, the molecular weight of the ultra-high molecular weight polyethylene is kept above 350 ten thousand, the comprehensive performance of the ultra-high molecular weight polyethylene is not damaged, and the ultra-high molecular weight polyethylene is continuously and effectively molded into a two-dimensional sheet.
The layered composite member may be prepared by a four roll calender. The four-roll calender comprises an upper roll, a middle roll and a lower roll which are sequentially arranged, and a side roll is arranged beside the upper roll; each roller of the four-roller calender is provided with a position adjusting mechanism, the gap between the middle roller and the lower roller is controlled to be 1 +/-0.5 mm, the temperature of the upper roller and the side roller is 135-145 ℃, the temperature of the middle roller is 135-145 ℃, and the temperature of the lower roller is 70-100 ℃. And a constant-temperature drying tunnel with an electric heater and a hot air circulating system, an embossing roller set, a cooling device, a tension control roller, a wind-up roller and the like are sequentially arranged behind the four-roller calender. The temperature of the constant-temperature drying channel is uniform and constant at 115-130 ℃; the embossing roller set comprises embossing rollers and supporting rollers, a three-dimensional pattern is formed on the ethylene propylene diene monomer rubber layer 1 of the composite member, a mechanical anchoring combination point is provided, and the external bonding performance of the composite member is improved; the cooling device comprises a conveying belt and a cooling fan positioned above the conveying belt, so that the laminated composite member is effectively cooled in the continuous production process; meanwhile, due to the advantages of the composition and the structure of the layered composite component, the rubber layer and the adjacent and non-jointed ultra-high molecular weight polyethylene film layer can not be adhered during rolling, a release layer or a protective layer is not needed, and the layered composite component is economical and environment-friendly.
The preparation process of the layered composite member is as follows:
heating the upper roller, the middle roller and the side roller to 135-145 ℃, heating the lower roller to 70-100 ℃, supplying rubber layer raw materials containing ethylene propylene diene monomer rubber between the upper roller and the side roller by an ethylene propylene diene monomer rubber layer supply device, and carrying out induced vulcanization for 0.3-3 min; extruding ultra-high molecular weight polyethylene with molecular weight more than 350 ten thousand by an extruder, feeding the extruded ultra-high molecular weight polyethylene between a middle roller and a lower roller of a four-roller calender after passing through a sheet calender group, carrying out hot-pressing on the ethylene propylene diene monomer rubber subjected to induced vulcanization between the middle roller and the lower roller, controlling the gap between the middle roller and the lower roller to be 0.5-1.5mm, controlling the thickness of an ultra-high molecular weight polyethylene outer layer 1 to be 0.3-0.8mm, controlling the thickness of an ethylene propylene diene monomer rubber layer 1 to be 0.2-0.8mm, feeding a formed laminated composite member into a constant-temperature drying tunnel with the length of 5-10m and provided with an electric heater and a hot air circulating system, wherein the drying tunnel adopts a side opening and closing mode, the traveling speed of the laminated composite member in the drying tunnel is 1-2m/min, fully vulcanizing for 5-10min, feeding the laminated composite member into an embossing roller after passing through the drying tunnel, and forming a three-dimensional pattern on the ethylene propylene diene monomer rubber layer 1 by the embossing roller, and the roughness of the bonding surface is improved, and then the layered composite component is cooled to normal temperature through a transmission belt of a cooling device and a cooling fan positioned above the transmission belt, and then enters a winding roller through a tension control roller for winding.
As shown in fig. 3, the wind power blade F with the layered composite member is located on the outermost layer of the front edge part of the blade main body of the wind power blade F, has a good protection effect, is high in weather resistance, is economical and environment-friendly, and is suitable for large-scale and continuous production.
The foregoing describes preferred embodiments of the present invention, and is intended to provide a clear and concise description of the spirit and scope of the invention, and not to limit the same, but to include all modifications, substitutions, and alterations falling within the spirit and scope of the invention as defined by the appended claims.
Claims (8)
1. A layered composite component, comprising: an ultra-high molecular weight polyethylene outer layer (1) and an ethylene propylene diene monomer rubber layer (2); the ethylene propylene diene monomer rubber layer (2) and the ultra-high molecular weight polyethylene outer layer (1) are directly bonded into a whole, the opposite surface of the ethylene propylene diene monomer rubber layer (2) facing the ultra-high molecular weight polyethylene outer layer (1) is an external bonding surface of the layered composite member, the external bonding surface of the layered composite member is provided with a three-dimensional pattern, the three-dimensional pattern is a combination of various patterns, and different three-dimensional patterns are adopted in the edge area and the central area of the ethylene propylene diene monomer rubber layer (2); the total thickness of the layered composite member is 0.5-1.5 mm.
2. The layered composite structure as claimed in claim 1, wherein said outer layer (1) of ultra high molecular weight polyethylene has a thickness of 0.3 to 0.8 mm.
3. The layered composite component as claimed in claim 1, wherein said ethylene propylene diene rubber layer (2) has a thickness of 0.2 to 0.8 mm.
4. The layered composite component according to any one of claims 1 to 3, wherein said ethylene propylene diene rubber layer (2) is a double vulcanized ethylene propylene diene rubber layer.
5. The layered composite component of claim 4, wherein the depth of said relief pattern is 100-200 μm.
6. Wind turbine blade, characterized in that it has a laminar composite member according to any of claims 1 to 5.
7. The wind blade as set forth in claim 6 wherein said wind blade includes a blade body portion, said layered composite member being located outermost of said blade body portion.
8. The wind blade of claim 7 wherein said layered composite member is located at a leading edge portion of said blade body portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220370913.2U CN217197269U (en) | 2022-02-23 | 2022-02-23 | Layered composite component and wind power blade with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220370913.2U CN217197269U (en) | 2022-02-23 | 2022-02-23 | Layered composite component and wind power blade with same |
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| Publication Number | Publication Date |
|---|---|
| CN217197269U true CN217197269U (en) | 2022-08-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220370913.2U Active CN217197269U (en) | 2022-02-23 | 2022-02-23 | Layered composite component and wind power blade with same |
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| Country | Link |
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| CN (1) | CN217197269U (en) |
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- 2022-02-23 CN CN202220370913.2U patent/CN217197269U/en active Active
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