CN115750233A - Three-section type wind power blade rain cover and manufacturing method and assembling method thereof - Google Patents
Three-section type wind power blade rain cover and manufacturing method and assembling method thereof Download PDFInfo
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- CN115750233A CN115750233A CN202211460499.5A CN202211460499A CN115750233A CN 115750233 A CN115750233 A CN 115750233A CN 202211460499 A CN202211460499 A CN 202211460499A CN 115750233 A CN115750233 A CN 115750233A
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Abstract
The embodiment of the invention provides a three-section type rain cover for a wind power blade and a manufacturing method and an assembling method of the three-section type rain cover, and belongs to the technical field of wind power. The method comprises the following steps: three sections of arc-shaped structural members are respectively an L block, a T block and an S block; the L block, the T block and the S block are used as three parts of the rain cover and are mutually connected and fixed end to form a rain cover body; the two ends of the S block are respectively provided with a first flanging step-shaped structure and a second flanging step-shaped structure; one end of the L block is a first fixing structure matched with the first flanging step-shaped structure of the S block, and the other end of the L block is a third flanging step-shaped structure; and two ends of the T block are respectively provided with a second fixing structure matched with the second flanging step-shaped structure of the S block and a third fixing structure matched with the third flanging step-shaped structure of the L block. The scheme of the invention not only avoids the problem of difficult transportation and installation caused by overlarge size of the integrated rain cover, but also ensures that the problem of water leakage caused by a sectional structure can not be generated.
Description
Technical Field
The invention relates to the technical field of wind power, in particular to a three-section type wind power blade rain cover, a manufacturing method of the three-section type wind power blade rain cover and an assembling method of the three-section type wind power blade rain cover.
Background
The wind power blade is a key part for capturing wind energy of the wind generating set, is directly exposed to the external environment and is eroded by wind, sand, rain and snow. Under the rain and snow scene, water can flow to the blade root along wind-powered electricity generation blade to further flow into wheel hub and cabin, in order to prevent that rain and snow from getting into wheel hub, cabin, influence operation safety and life-span such as unit electrical component, the rain-proof cover of blade becomes the indispensable part of wind turbine generator system. The blade rain cover is arranged at the root of the blade, and a circle is arranged along the periphery of the root of the blade and used for blocking water from flowing through. In order to comply with the development trend of large diameter of a wind wheel of a wind turbine generator, the size of a blade rain cover and the pitch diameter of a blade root are increased synchronously, and no matter the existing rain cover is directly installed when leaving a factory or the rain cover is transported to a site for installation, the huge size of the rain cover brings great burden to the transportation process. And even if the transportation problem is overcome, the problem of difficult installation still exists because of the oversize.
Further, with the vigorous development of the wind power generation industry, the problems of harmless disposal and high-valued recycling of retired or waste wind power blades increasingly cause the attention of the industry. The traditional treatment modes of burying and burning the waste wind power blades and the like not only occupy a large amount of land resources and seriously threaten underground water sources and air quality, but also do not fully utilize the residual value of raw materials such as glass fibers, resin and the like, thereby causing resource waste. At present, the rain cover is mainly prepared by using polyester or epoxy resin, biaxial or triaxial glass fiber cloth and the like as raw materials through forming modes such as manual bag pasting and pressing or vacuum infusion and utilizing a mold with specific specifications. Therefore, the existing wind turbine generator has several obvious problems, namely the rain cover is difficult to transport and install and the development degree of the residual value of the retired blade is low. In order to solve the problems, a new wind power blade rain cover and a corresponding manufacturing and assembling method need to be created.
Disclosure of Invention
The invention aims to provide a three-section type wind power blade rain cover, a three-section type wind power blade rain cover manufacturing method and a three-section type wind power blade rain cover assembling method, and aims to at least solve the problems that the existing rain cover is difficult to transport and install and the residual value development degree of retired blades is low.
In order to achieve the above object, a first aspect of the present invention provides a three-stage wind turbine blade rain cover, including: the three sections of arc-shaped structural parts are L blocks, T blocks and S blocks respectively; the L block, the T block and the S block are used as three parts of the rain cover and are mutually connected and fixed end to form a rain cover body; the two ends of the S block are respectively provided with a first flanging step-shaped structure and a second flanging step-shaped structure; one end of the L block is a first fixing structure matched with the first flanging step-shaped structure of the S block, and the other end of the L block is a third flanging step-shaped structure; and two ends of the T block are respectively provided with a second fixing structure matched with the second flanging step-shaped structure of the S block and a third fixing structure matched with the third flanging step-shaped structure of the L block.
Optionally, the central angle of the L-block is 135 °; the central angle of the T block is 135 degrees; the central angle of the S block is 90 degrees.
The invention provides a method for manufacturing a three-section type wind power blade rain cover, which is applied to the wind power blade rain cover and comprises the following steps: mixing and kneading the waste blades in an internal mixer to obtain a mould pressing material; pouring mold pressing materials in the molds corresponding to the arc-shaped structural members coated with the release agent, and preheating and prepressing the molds after material pouring; and (3) carrying out a mold closing process on the preheated and pre-pressed filled mold under a preset condition, and carrying out demolding treatment after the mold pressing material is solidified to obtain each arc-shaped structural member.
Optionally, the mixing and kneading comprises: adding a fiber composite material for fluffing the waste blade material; adding a low-shrinkage additive for reducing the shrinkage rate of the mould pressing material; the low-shrinkage additive is any one of polystyrene solid powder, polyethylene solid powder and polypropylene solid powder.
Optionally, in the mixing and kneading process, a thermoplastic material is added for increasing the plasticity and fluidity of the molding compound.
Optionally, the thermoplastic material is: polyethylene, polypropylene, polyethylene terephthalate, and polyurethane.
Optionally, the target temperature range of preheating is 55-65 ℃; the target pressure range of the prepressing is 6-8Mpa.
Optionally, the mold closing process includes: performing mold closing operation in a hydraulic press, and performing mold closing and air exhausting operation in mold closing environment with pressure of 15-20MPa and temperature of 150-180 deg.C.
The invention provides a three-section type wind power blade rain cover assembling method, which is applied to the wind power blade rain cover and comprises the following steps: arranging L blocks and T blocks in the arc-shaped structural member along the installation position of a preset rain cover at the root of the wind power blade, so that a third flanging step-shaped structure of the L blocks is in lap joint contact with a third fixing structure of the T blocks; fixing screws at the lap joint contact positions of the L block and the T block; measuring a preset installation position of the rechecking S block, after the rechecking is passed, performing lap joint on the basis of L block and T block reserved fixing structures, and fixing screws at the lap joint positions; sealing and filling are carried out along one circle of the fixed rain cover, and after filling is finished, fastening operation of each connecting screw is executed, and assembly of the wind power blade rain cover is finished.
Optionally, the assembly of the L block and the T block is performed before leaving a factory, and the assembly of the S block is performed on a construction site.
Through above-mentioned technical scheme, make multistage structure with rain-proof cover to the connection fixed knot that the design corresponds constructs, has avoided the too big transportation and the difficult problem of installation that brings of rain-proof cover size of wholeization promptly, has still guaranteed inseparable degree of each other under the equipment mode, can not produce the problem of leaking because of sectional type structure.
Additional features and advantages of embodiments of the invention will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the embodiments of the invention without limiting the embodiments of the invention. In the drawings:
fig. 1 is a schematic structural diagram of a wind turbine blade rain cover according to an embodiment of the present invention;
fig. 2 is a schematic view of a connection structure of a rain cover for a wind turbine blade according to an embodiment of the invention.
Description of the reference numerals
10-L blocks; 20-T blocks; 30-S block; 40-flanging step-shaped structure; 50-fixed structure.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
A wind power plant, referred to as a wind power plant for short, is a power plant that generates electricity using wind, and belongs to one of renewable energy power plants. At present, in order to achieve low-carbon and environment-friendly sustainable development, countries in the world successively set the development of renewable energy as an important target, and under the condition, wind power plants become the preferred energy development focus of each country. In the aspect of added value, the wind power plant not only can supply power, but also provides various functions of edutainment, sightseeing, leisure, environment beautification and the like. The wind power blade is a key part for capturing wind energy of the wind generating set, is directly exposed to the external environment and is eroded by wind, sand, rain and snow. Under the rain and snow scene, water can flow to the blade root along wind turbine blade to further flow into wheel hub and cabin, in order to prevent that rain and snow from getting into wheel hub, cabin, influence operation safety and life-span such as unit electrical component, the rain-proof cover of blade becomes the indispensable part of wind turbine generator system. The rain cover of blade sets up at the blade root, extends blade root periphery and sets up the round for block water and flow through.
In order to comply with the development trend of large diameter of a wind wheel of a wind turbine generator, the size of a blade rain cover and the pitch diameter of a blade root are increased synchronously, and no matter the existing rain cover is directly installed when leaving a factory or the rain cover is transported to a site for installation, the huge size of the rain cover brings great burden to the transportation process. And even if the transportation problem is overcome, the problem of difficult installation still exists because of the oversize.
Further, with the vigorous development of the wind power generation industry, the problems of harmless disposal and high-valued recycling of retired or waste wind power blades increasingly cause the attention of the industry. The traditional treatment modes of burying and burning the waste wind power blades and the like not only occupy a large amount of land resources and seriously threaten underground water sources and air quality, but also do not fully utilize the residual value of raw materials such as glass fibers, resin and the like, thereby causing resource waste. At present, the rain cover is mainly prepared by taking polyester or epoxy resin, biaxial or triaxial glass fiber cloth and the like as raw materials through forming modes such as manual bag pasting pressing or vacuum infusion and utilizing a mold with specific specifications.
Therefore, the existing wind turbine generator has several obvious problems, namely the rain cover is difficult to transport and install and the development degree of the residual value of the retired blade is low. Aiming at the two problems, the scheme of the invention provides a novel wind power blade rain cover and a corresponding manufacturing method and assembling method, and solves the problems of difficult transportation and installation of the rain cover and less waste and residual value development of retired blades in the existing scene. The scheme of the invention fully utilizes the value of raw materials of the retired blade and adaptively selects a new method for manufacturing the rain cover. And make rain-proof cover multistage structure to the connection fixed knot that the design corresponds constructs 50, has avoided the too big problem of transportation and the installation difficulty that brings of rain-proof cover of integration promptly, has still guaranteed the inseparable degree of each other under the equipment mode, can not produce the problem of leaking because of sectional type structure.
Fig. 1 is a structural diagram of a wind turbine blade rain cover provided by an embodiment of the invention. As shown in fig. 1, an embodiment of the present invention provides a wind turbine blade rain cover, including: l block 10, T block 20, and S block 30; the L block 10, the T block 20 and the S block 30 are fixedly connected end to end; two ends of the S block 30 are provided with flange step-shaped structures 40; one end of the L block 10 is provided with a fixed structure 50 which is matched with the flanging step-shaped structure 40 of the S block 30, and the other end is provided with the flanging step-shaped structure 40; and two ends of the T block 20 are provided with a fixing structure 50 matched with the flanging step-shaped structure 40 of the S block 30 and a fixing structure 50 matched with the flanging step-shaped structure 40 of the L block 10.
In the embodiment of the invention, the traditional rain cover is of an integrated structure which is most stable to the rain-proof effect, and no high risk point of water leakage exists because no connection interruption structure exists. In order to achieve the technical effect, the end of each section of arc-shaped structure is provided with the flanging step-shaped structure 40 and the corresponding matched fixing structure 50, so that a certain overlap area exists between the flanging step-shaped structure and the corresponding matched fixing structure at the fixed position, and the problem of water leakage caused by overlarge gap in a direct end-to-end connection mode is solved. This kind of overlap joint mode can also realize that each section structure fastening degree adjusts to this can avoid the untight problem of laminating that blade root deformation leads to, adjusts through further fastening, makes rain-proof cover with the laminating on blade surface with inseparable.
Further, the most significant problem affecting the transportation of the blades is that the diameter and the length of the rain cover are too long, so that the problem that any section of the obtained arc-shaped structure does not have the corresponding diameter problem to be solved is necessarily guaranteed. If the blade is only divided into two halves, half of the blade must keep the diameter length, and the problem of difficult transportation caused by the overlong diameter cannot be solved. However, if the water is divided into a plurality of sections, for example, ten sections, although each section is small, there are a plurality of connection points, so that the risk of water leakage is further enlarged, and the preset position of each section is fixed, and when assembling is performed, too many section structures cause a problem of difficult adaptation.
Based on the problems, the scheme of the invention preferably arranges the rain cover into three parts, and the central angle of the L block 10 is 135 degrees; the central angle of the T block 20 is 135 degrees; the rounded angle of the S-block 30 is 90 °. Any one section of arc-shaped structure does not have an original diameter part, and the number of sections is not too large, so that the problems of too many connection points and difficult assembly are solved. Wherein, the two ends of the S block 30 are provided with the flanging step-shaped structure 40, one end of the L block 10 is provided with the flanging step-shaped structure 40, the arc-shaped structure is used for subsequent overlapping and is hidden under the fixed structure 50 matched with the arc-shaped structure, and therefore, the step-shaped structure is a section structure extending out from the corresponding subsection structure. The design is step-shaped to avoid the bulge after overlap joint, so that the water leakage risk is caused. The overlapped plane and the original plane of the segmented structure are on the same plane by mutually matching and overlapping the step shapes.
The second aspect of the scheme of the invention provides a method for manufacturing a three-section type wind power blade rainproof cover, which comprises the following steps: mixing and kneading waste blades in an internal mixer to obtain a molded material; pouring mold pressing materials in the molds corresponding to the arc-shaped structures coated with the release agent, and preheating and prepressing the molds after material pouring; and (3) carrying out a mold closing process on the preheated and pre-pressed filled mold under a preset condition, and carrying out demolding treatment after the mold pressing material is cured to obtain each arc-shaped structure.
In the embodiment of the invention, at present, the rain cover is mainly prepared by using polyester or epoxy resin, biaxial or triaxial glass fiber cloth and the like as raw materials through forming modes such as bag pasting pressing by hand or vacuum infusion and the like and utilizing a mold with a specific specification.
Preferably, in order to meet the requirements of sectional design and subsequent fit connection, the waterproof cover is manufactured by adopting a compression molding process different from the existing waterproof cover manufacturing method. Different from the molding mode of composite materials such as manual bag pasting and vacuum infusion, the compression molding process is to put a certain amount of molding materials such as fiber materials, crushed cloth materials, powder materials or granular materials into a metal matched mold and cure the molded product under the specific temperature and pressure. The method has the advantages of high product smoothness, high quality stability, high production efficiency, good production environment, high efficiency and the like, and is widely applicable to the fields of automobile parts, building materials, engineering machinery parts and the like. According to the scheme, the wind power blade rain cover which is environment-friendly, low in cost and high in quality and meets the technical performance requirement is prepared according to a novel design scheme by using waste blade materials as main raw materials through a compression molding process.
Preferably, the kneading comprises: adding a fiber composite material for fluffing the waste blade material; adding a low shrinkage additive for reducing the shrinkage rate of the molding material; the low-shrinkage additive is any one of polystyrene solid powder, polyethylene solid powder and polypropylene solid powder.
Preferably, in the mixing and kneading process, a thermoplastic material is added for increasing the plasticity and fluidity of the molding compound.
Preferably, the thermoplastic material is: any one of polyethylene, polypropylene, polyethylene terephthalate and polyurethane.
Preferably, the target temperature range of preheating is 55-65 ℃; the target pressure range of the prepressing is 6-8Mpa.
Preferably, the mold clamping process includes: performing mold closing operation in a hydraulic press, and maintaining mold closing environment with pressure of 15-20MPa and temperature of 150-180 deg.C to perform mold closing and exhaust operation.
Specifically, firstly, waste blade materials and a mould are prepared, then the waste blade materials which are crushed, screened and mixed to be in a rubber state are weighed, filled into a preheating mould coated with a release agent, and then mould assembly and solidification are carried out according to preset temperature, pressure and time, and exhaust operation is required during the process. In the pressure maintaining and curing stage, the curing speed is controlled by factors such as the heating rate, the pressure and the like, so that byproducts in the curing process are reduced, the volume shrinkage rate of a finished product is reduced, and the curing degree of the product is ensured. And finally, demolding, after solidification and cooling are finished, carrying out post-treatment on the blade rainproof cover, and after the mold is cleaned, adjusting the type of the mold core mold to manufacture the next product.
Wherein, the banbury mixer is mixed to: the waste blades are fully mixed and kneaded in an internal mixer, and the fiber composite material is fluffy and then fully kneaded with the thermoplastic resin glue solution until the resin is fully mixed. The thermoplastic material is Polyethylene (PE) or polypropylene (PP) or polyethylene terephthalate (PET) or Polyurethane (PU) which needs to be added in the mixing process, and the aim is to properly increase the plasticity and the fluidity of the molding material. The temperature of the internal mixer needs to be controlled at a certain temperature, and the temperature is 180-200 ℃. The die pressing process comprises the following steps: the method comprises the steps of coating a mold release agent on the mold, feeding and preheating the mold, prepressing the mold, mixing the mold, exhausting, maintaining pressure, curing, demolding and cleaning the mold. The preheating and the prepressing respectively refer to that the temperature which is increased to the mould pressing mould in advance is controlled to be 55-65 ℃ and the pressure which is applied in advance is 6-8Mpa. The mold closing process is completed in a hydraulic press. The pressure maintaining solidification refers to maintaining the pressure in the mold, controlling the pressure at 15-20Mpa, filling the mold cavity with mold pressing material, and making the blade recovery material, the thermoplastic material, the accelerator and the low shrinkage additive perform full solidification reaction, wherein the mold pressing temperature is 150-180 ℃. The low shrinkage additive acts as local relaxation to release internal stress to compensate polymerization shrinkage, thereby achieving the effect of reducing shrinkage. The low-shrinkage additive is solid powder of Polystyrene (PS), polyethylene (PE), polypropylene (PP) and the like.
In the embodiment of the invention, the blade rain cover prepared from the waste blade recycled material through die pressing is a rubber-state die pressing material prepared by mixing the blade recycled material serving as a main material with a small amount of thermoplastic material, an accelerator and a low-shrinkage additive through an internal mixer. Wherein the thermoplastic material is selected from a polypropylene film, the accelerant is selected from a corresponding material formed by vacuum infusion, and the low-shrinkage additive is selected from polystyrene. The thickness of the rubber mold pressing material is 8mm, and the finished product is used for 60-90 m-grade blades.
In the embodiment of the invention, the scheme of the invention designs and develops a system and a method for manufacturing a wind power blade rainproof cover by utilizing a waste wind power blade regeneration technology. A small amount of thermoplastic material, an accelerant, a low-shrinkage additive and the like are added to form a mixed material, the mixed material is firstly mixed in an internal mixer to form a rubber-state mould pressing material, and then the rubber-state mould pressing material is transferred into a mould pressing die to be subjected to mould pressing through pressure and temperature control to form the wind-power blade rain cover meeting performance requirements. The system is simple and easy to operate, the loss of raw materials is small, the mechanical property of the finished product is stable, the dimensional precision of the product is high, the repeatability is good, the utilization rate of the die is high, the manufacturing cost of forming equipment is low, and the production efficiency is high. The method uses the waste wind power blade as the main raw material, can well consume the solid waste generated by the waste blade, and realizes the green recovery and high value-added utilization of the wind power blade.
Example 1:
the mould pressing method comprises the steps of preheating a mould pressing mould at 55 ℃, and then coating a release agent to ensure that a finished product can be smoothly released. Preparing the material of the waste blade in the curing process of the release agent, screening the material into the length of 20-30mm and the width of 2-10mm, and then mixing in an internal mixer, wherein the polypropylene film thermoplastic material, the epoxy resin, the curing agent, the accelerator and the low-shrinkage additive are required to be added in the mixing process, and the temperature of the internal mixer is required to be controlled at 180 ℃. After the material mixing is finished and the mold release agent is cured, the mixed mold pressing material is subjected to overdetermination, then transferred into a mold cavity, and preheated and pre-pressed on a mold, wherein the preheating temperature is 60 ℃ and the pre-applied pressure is 6Mpa. The fluidity of the mould pressing material of the cavity is required to be checked in the preheating and prepressing processes, then mould closing and exhaust are carried out, and meanwhile, the thickness of the rubber mould pressing material is ensured to be 8mm. The mould pressing process is completed in a hydraulic press 315T, the curing speed is controlled by controlling the temperature and the pressure under the mould pressing condition so as to reduce byproducts in the curing process and reduce the volume shrinkage rate of a finished product, the curing degree of the product is ensured by controlling the pressure in the mould closing process, the mould pressing temperature is controlled at 180 ℃, and the pressure is 20Mpa. And (3) demolding after curing is finished, supporting the blade manhole cover plate through aftertreatment after curing and cooling are finished, and cleaning the die to finish manufacturing the next product.
The embodiment of the invention also provides an assembling method of the three-section type wind power blade rain cover, which is applied to the wind power blade rain cover, and the method comprises the following steps: arranging the L blocks 10 and the T blocks 20 along the installation position of the preset rain cover at the root of the wind power, so that the flanging step-shaped structure 40 at one end of each L block 10 is in lap contact with the fixing structure 50 correspondingly matched with the T block 20; the L block 10 and the T block 20 are in lap contact to be fixed by screws; measuring the preset installation position of the rechecking S block 30, after rechecking is passed, carrying out lap joint connection with the L block 10 and the T block 20 reserved fixing structure 50, and carrying out screw fixation at the lap joint connection position; and sealing and filling the fixed rain cover for one circle, and executing fastening operation of each connecting screw after filling to finish assembly of the rain cover for the wind power blade.
In another possible embodiment, the wind turbine blade rain shield is installed in a production manufacturing plant and a project construction site respectively, wherein the largest part L block 10 and the larger part T block 20 are installed in the production manufacturing plant, and the smaller part S block 30 is installed in the project construction site. This way, the difficulty of site operation can be greatly reduced, and because the S block 30 is not installed, the top position of the S block is reduced to a certain extent, and the beneficial effect of the transportation process is also obvious.
In the embodiment of the invention, the design of the three-section combined rain cover and the step-by-step assembly method provided by the scheme of the invention can effectively reduce the transportation height of the wind power blade, ensure the installation efficiency and the installation quality of the rain cover and effectively solve the problems of height limitation and installation of the blade. On the premise of ensuring the installation efficiency and the installation quality of the rain cover, the purpose of reducing the transportation height of the wind power blade can be achieved, and the problems of height limitation and installation of the blade transportation are effectively solved.
Example 2: after the rain-proof cover of L piece 10 and T piece 20 is installed to the blade, the rain-proof cover breach is formed at the blade top, installs the rain-proof cover of S piece 30 in breach position, need not to utilize auxiliary fixtures, only needs to measure the recheck mounted position. Similar to the installation of the L-shaped rain cover 10 and the T-shaped rain cover 20, after the positioning and cleaning work is finished, two pull rivets and four hexagon head bolts with the size of M10 multiplied by 30mm or other modes are used at the flanging step positions at the two ends of the S-shaped rain cover 30 to be fixed with one end of the L-shaped rain cover 10 and one end of the T-shaped rain cover 20. And finally, sealing the edges of the contact surfaces of the inner side and the outer side of the rain cover of the S block 30 in a sealing mode, wherein the sealing positions are smooth and have no obvious edges and corners. The installation work of the whole set of the rain cover is completed.
Preferably, set up strip screw on the stair structure of each arc structure, the bolt passes behind this screw, can carry out the removal of certain degree along a direction, can adjust the fastening degree between each section through this kind of mode to the laminating degree between rain-proof cover of adjustment and the blade greatly guarantees that the condition of leaking can not appear after fixed.
The scheme of the invention solves the problem that the rain cover for the blade is manufactured by reasonable formula modulation and process design and a compression molding mode due to a large amount of solid waste generated by the waste wind power blade at present, thereby realizing resource recycling and high-value recycling of the waste blade. Because the raw materials of this scheme are waste wind-powered electricity generation blade material for the majority, consequently can reduce the raw and other materials cost of traditional blade rain-proof cover. Simultaneously, the rain-proof cover of syllogic combination design and distributed type mounting means that this patent provided not only effectively reduces blade transportation height, solves the road limit for height problem, and easy to assemble moreover, save on-the-spot installation time improve installation effectiveness and installation quality.
Although the embodiments of the present invention have been described in detail with reference to the accompanying drawings, the embodiments of the present invention are not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the embodiments of the present invention within the technical idea of the embodiments of the present invention, and these simple modifications all belong to the protection scope of the embodiments of the present invention. It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. In order to avoid unnecessary repetition, the embodiments of the present invention will not be described separately for the various possible combinations.
In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as disclosed in the embodiments of the present invention as long as it does not depart from the spirit of the embodiments of the present invention.
Claims (10)
1. The utility model provides a rain-proof cover of syllogic wind-powered electricity generation blade which characterized in that includes:
the three sections of arc-shaped structural members are respectively L blocks, T blocks and S blocks;
the L block, the T block and the S block are used as three parts of the rain cover and are mutually connected and fixed end to form a rain cover body;
the two ends of the S block are respectively provided with a first flanging step-shaped structure and a second flanging step-shaped structure;
one end of the L block is a first fixing structure matched with the first flanging step-shaped structure of the S block, and the other end of the L block is a third flanging step-shaped structure;
and two ends of the T block are respectively provided with a second fixing structure matched with the second flanging step-shaped structure of the S block and a third fixing structure matched with the third flanging step-shaped structure of the L block.
2. The wind turbine blade rain shield according to claim 1, wherein the central angle of the L-shaped blocks is 135 °;
the central angle of the T block is 135 degrees;
the central angle of the S block is 90 degrees.
3. A manufacturing method of a three-section type wind power blade rain cover is applied to the wind power blade rain cover of any one of claims 1 and 2, and is characterized by comprising the following steps:
mixing and kneading the waste blades in an internal mixer to obtain a mould pressing material;
pouring mould pressing materials in the moulds corresponding to the arc-shaped structural components coated with the release agent, and preheating and prepressing the moulds after material pouring;
and (3) carrying out a mold closing process on the preheated and pre-pressed filled mold under a preset condition, and carrying out demolding treatment after the mold pressing material is cured to obtain each arc-shaped structural member.
4. The method according to claim 3, wherein said kneading comprises:
adding a fiber composite material for fluffing the waste blade material;
adding a low-shrinkage additive for reducing the shrinkage rate of the mould pressing material;
the low-shrinkage additive is any one of polystyrene solid powder, polyethylene solid powder and polypropylene solid powder.
5. The method as claimed in claim 3, wherein a thermoplastic material is added for increasing plasticity and fluidity of the molding compound during said kneading.
6. The method according to claim 5, characterized in that the thermoplastic material is:
any one of polyethylene, polypropylene, polyethylene terephthalate, and polyurethane.
7. The method of claim 3, wherein the target temperature range for preheating is 55-65 ℃;
the target pressure range of the prepressing is 6-8Mpa.
8. The method of claim 3, wherein the clamping process comprises:
performing mold closing operation in a hydraulic press, and performing mold closing and exhausting operation in a mold closing environment with the pressure of 15-20MPa and the temperature of 150-180 ℃.
9. A three-section type wind power blade rain cover assembling method is applied to the wind power blade rain cover of any one of claims 1 and 2, and is characterized by comprising the following steps:
arranging L blocks and T blocks in the arc-shaped structural member along the installation position of a preset rain cover at the root of the wind power blade, so that a third flanging step-shaped structure of the L blocks is in lap joint contact with a third fixing structure of the T blocks;
fixing screws at the lap joint contact positions of the L block and the T block;
measuring a preset installation position of the rechecking S block, after the rechecking is passed, performing lap joint on the basis of L block and T block reserved fixing structures, and fixing screws at the lap joint positions;
sealing and filling are carried out along the periphery of the fixed rain cover, and after filling is finished, fastening operation of each connecting screw is executed, and assembly of the rain cover of the wind power blade is finished.
10. The method of claim 9, wherein the assembly of the L-block and the T-block is performed before shipment and the assembly of the S-block is performed at a construction site.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211460499.5A CN115750233A (en) | 2022-11-17 | 2022-11-17 | Three-section type wind power blade rain cover and manufacturing method and assembling method thereof |
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| CN202211460499.5A CN115750233A (en) | 2022-11-17 | 2022-11-17 | Three-section type wind power blade rain cover and manufacturing method and assembling method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116624345A (en) * | 2023-07-25 | 2023-08-22 | 中车山东风电有限公司 | Wind power blade rain shielding ring structure and installation method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116624345A (en) * | 2023-07-25 | 2023-08-22 | 中车山东风电有限公司 | Wind power blade rain shielding ring structure and installation method |
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