CN112324612A - Wind power blade, wind generating set and manufacturing method of wind power blade - Google Patents

Wind power blade, wind generating set and manufacturing method of wind power blade Download PDF

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Publication number
CN112324612A
CN112324612A CN202011287872.2A CN202011287872A CN112324612A CN 112324612 A CN112324612 A CN 112324612A CN 202011287872 A CN202011287872 A CN 202011287872A CN 112324612 A CN112324612 A CN 112324612A
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CN
China
Prior art keywords
blade
electric heating
shell
heating element
windward
Prior art date
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Pending
Application number
CN202011287872.2A
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Chinese (zh)
Inventor
张金玲
姜岩岩
王玉红
张孟冉
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Guodian United Power Technology Chifeng Co Ltd
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Guodian United Power Technology Chifeng Co Ltd
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Filing date
Publication date
Application filed by Guodian United Power Technology Chifeng Co Ltd filed Critical Guodian United Power Technology Chifeng Co Ltd
Priority to CN202011287872.2A priority Critical patent/CN112324612A/en
Publication of CN112324612A publication Critical patent/CN112324612A/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D1/00—Wind motors with rotation axis substantially parallel to the air flow entering the rotor 
    • F03D1/06—Rotors
    • F03D1/065—Rotors characterised by their construction elements
    • F03D1/0675—Rotors characterised by their construction elements of the blades
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/28—Shaping operations therefor
    • B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
    • B29C70/36—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and impregnating by casting, e.g. vacuum casting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/28—Shaping operations therefor
    • B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D17/00—Monitoring or testing of wind motors, e.g. diagnostics
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D80/00—Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
    • F03D80/40—Ice detection; De-icing means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D80/00—Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
    • F03D80/60—Cooling or heating of wind motors
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/72—Wind turbines with rotation axis in wind direction
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Abstract

The invention discloses a wind power blade, a wind generating set and a manufacturing method of the wind power blade, relates to the technical field of wind power generation equipment, and mainly aims to remove an ice layer on the surface of the wind power blade and prevent the surface of the wind power blade from being frozen. The main technical scheme of the invention is as follows: this wind-powered electricity generation blade includes: the body comprises a windward shell and a leeward shell which are mutually butted, hydrophobic layers are arranged on the outer surfaces of the windward shell and the leeward shell, and an electric heating element is filled in the windward shell in a vacuum manner; the detection module is arranged in a cavity between the windward side shell and the leeward side shell and is used for detecting the temperature in the body; and the control module is respectively connected with the electric heating element and the detection module.

Description

Wind power blade, wind generating set and manufacturing method of wind power blade
Technical Field
The invention relates to the technical field of wind power generation equipment, in particular to a wind power blade, a wind generating set and a manufacturing method of the wind power blade.
Background
Wind energy is a very important and large-reserve safe and clean energy, wind power generation is a main form of wind energy utilization, and wind resources in China are mainly distributed in northeast, northwest and north China of ice, snow and coastal areas with heavy moisture. When the wind generating set is installed in the regions, the wind power blades run at zero and below zero degrees centigrade, and if the wind power blades run in humid air, rain water and ice and snow, the wind power blades can be frozen when the wind power blades run in supercooled water drops.
The icing of the wind power blade can be divided into two types, one type is frost ice, the other type is pure icing, but the more practical situation is ice mixed with the frost ice and the frost ice, the mixed ice has larger influence on the aerodynamic performance of the blade, not only the aerodynamic lift force is reduced, but also the aerodynamic resistance is increased, the icing exists on the front edge of the blade, the chord length of the cross section can be increased due to the icing, if the icing chord length is increased to a certain degree, on one hand, the blade can be broken due to the aerodynamic force acting on the blade, then a new ice layer is formed, and finally, a rough blade surface which looks like small sawteeth can be formed, so that the performance and the service life of the; on the other hand, the blade may be shut down for a long time due to an excessively long icing period, so that a large amount of generated energy is lost, and the blade is accumulated more at the front edge of the blade due to low wind speed and a rotation speed close to zero and a shearing force of an interface between the ice layer and the blade is small, so that the ice layer is thrown out in a tip part area to a certain extent after accumulation, but the throwing degrees are different, so that pneumatic and mass asymmetry is caused.
Disclosure of Invention
The embodiment of the invention provides a wind power blade, a wind generating set and a manufacturing method of the wind power blade, and mainly aims to remove an ice layer on the surface of the wind power blade and prevent the surface of the wind power blade from being frozen.
In order to achieve the purpose, the invention mainly provides the following technical scheme:
in a first aspect, an embodiment of the present invention provides a wind turbine blade, including:
the body comprises a windward shell and a leeward shell which are mutually butted, hydrophobic layers are arranged on the outer surfaces of the windward shell and the leeward shell, and an electric heating element is filled in the windward shell in a vacuum manner;
the detection module is arranged in a cavity between the windward side shell and the leeward side shell and is used for detecting the temperature in the body;
and the control module is respectively connected with the electric heating element and the detection module.
Furthermore, the electric heating element comprises a plurality of electric heating films connected with the control module, the electric heating films are arranged at the blade tip part in the windward side shell side by side along the length direction of the windward side shell, and the total length of the electric heating films is greater than or equal to 1/3 of the length of the windward side shell.
Furthermore, the detection module comprises a plurality of temperature sensors connected with the control module, and the temperature sensors are arranged at intervals along the length direction of the cavity and are positioned at the blade tip part of the body.
Furthermore, a protective film is poured into the windward side shell in a vacuum mode, and the protective film is coated outside the electric heating element.
In a second aspect, an embodiment of the present invention provides a wind generating set, which includes the wind turbine blade.
In a third aspect, an embodiment of the present invention provides a method for manufacturing a wind turbine blade, which is applied to the wind turbine blade, and includes:
laying an electric heating element on the windward side of the upper blade of the die paved with the auxiliary material;
sequentially laying first glass fiber cloth, a core material and second glass fiber cloth on the electric heating element;
arranging an adhesive injection pipeline and a vacuum system, and performing vacuum infusion on the auxiliary material, the electric heating element, the first glass fiber cloth, the core material and the second glass fiber cloth to obtain a blade shell;
the detection module and the electric heating element are respectively connected with the control module;
a hydrophobic layer is applied on the blade shell.
Further, electric heating element include a plurality of with the electric heat membrane that control module is connected, lay electric heating element on the mould that has laid supplementary material, specifically include:
and a plurality of electric heating films are laid at the tip part of the windward side of the blade on the die side by side, and the total length of the plurality of electric heating films is greater than or equal to 1/3 of the total length of the blade.
Further, before the glue injection pipeline and the vacuum system are arranged, the method further comprises the following steps:
through mounting holes are formed in the first glass fiber cloth, the core material and the second glass fiber cloth;
pre-burying a pipe body in the mounting hole;
and penetrating out the cable of the electric heating element through the pipe body, and plugging the pipe body by adopting a hole sealing material.
Further, after the pipe body is sealed by the sealing material, the method further comprises:
and coating the cable penetrating out of the tube body by adopting a vacuum bag film and sealant.
Further, after the electric heating elements are laid on the windward side of the blade on the die with the auxiliary materials laid, the method further comprises the following steps:
laying a protective film on the electric heating element;
before said applying a hydrophobic layer on the blade shell, the method comprises:
and coating a primer layer on the blade shell.
By means of the technical scheme, the invention at least has the following beneficial effects:
according to the technical scheme provided by the embodiment of the invention, the hydrophobic layers are arranged on the outer surfaces of the windward shell and the leeward shell, so that liquid drops can bounce off the surface of the blade before icing, and the possibility of blade icing is reduced. Through vacuum infusion electric heating element in the windward side shell, when the blade surface is covered by the ice layer under the condition of ultra-low temperature environment or shutdown, the electric heating element can be started, so that the ice layer on the blade surface begins to melt, and liquid drops formed after melting can not be attached to the blade under the action of the hydrophobic layer, thereby achieving the deicing effect. In addition, can also detect the temperature in the blade through detection module, control module can be according to the temperature of detection module feedback and the size of predetermineeing the temperature, control electric heating element's heating or stop heating, thereby realized that this electric heating element can be constant temperature after reaching predetermineeing the temperature, have the self-limiting temperature function, thereby realized the deicing effect better, the aerodynamic lift of blade has been promoted, the aerodynamic drag has been reduced, the performance and the life of blade have been guaranteed, still guarantee the symmetry of pneumatics and quality, the loss of generated energy has still been reduced.
Drawings
The accompanying drawings, which are included to provide a further understanding 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 principles of the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic structural diagram of a wind turbine blade according to an embodiment of the present invention;
fig. 2 is an enlarged schematic view of a portion a in fig. 1.
Detailed Description
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
As shown in fig. 1 and fig. 2, an embodiment of the present invention provides a wind turbine blade, including a body 1, where the body 1 includes a windward shell 11 and a leeward shell 12 that are butted to each other, the outer surfaces of the windward shell 11 and the leeward shell 12 are provided with a hydrophobic layer 2, and an electric heating element 3 is vacuum-filled in the windward shell 11; the detection module 4 is arranged in a cavity between the windward side shell 11 and the leeward side shell 12 and is used for detecting the temperature in the body 1; and the control module 5 is respectively connected with the electric heating element 3 and the detection module 4.
In the embodiment of the invention, the electric heating element 3 is vacuum-filled in the windward shell 11 of the blade, namely the electric heating element 3 and each layer of material of the blade are vacuum-filled to form an integral structure, so that the deicing effect of the electric heating element 3 on the blade can be improved, the installation stability and the use stability of the electric heating element 3 in the blade can be ensured, and the service life of the electric heating element 3 is prolonged. Moreover, because the windward side of the blade is an area easy to freeze, the electric heating element 3 is filled in the windward side shell 11 of the blade in a vacuum manner, so that the deicing effect is further improved, the cost is saved, and the power consumption is reduced.
In the embodiment of the invention, the hydrophobic layers 2 are arranged on the outer surfaces of the windward shell 11 and the leeward shell 12 of the blade, and the hydrophobic layers 2 can have super-hydrophobicity, so that liquid drops bounce off the surface of the blade before icing, most of the striking liquid drops cannot stay on the surface of the blade, and the icing possibility is effectively reduced. Moreover, the actual contact area of the liquid drops contacted with the surface of the blade and the substrate is very small under the action of the microstructure, so that the icing time is greatly prolonged, and even if the liquid drops are iced, the special solid-ice-gas contact mode also ensures that the ice layer and the surface of the blade have extremely low adhesive force, thereby further reducing the icing possibility. Specifically, the hydrophobic layer 2 may specifically adopt a polyurethane finish, a fluorocarbon finish, an epoxy resin finish, or the like having super-hydrophobic properties.
In the embodiment of the present invention, the control module 5 may be a control cabinet of the wind turbine generator system, and the control module 5 is connected to the detection module 4 and the electrothermal element 3, respectively, so as to detect the temperature in the blade by the detection module 4 and send the temperature to the control module 5 in real time, so that the control module 5 can compare the temperature fed back by the detection module 4 with the preset temperature, and if the temperature is lower than the preset temperature, the electrothermal element 3 is controlled to heat, and if the temperature is higher than or equal to the preset temperature, the electrothermal element 3 is controlled to stop heating, so that the electrothermal element 3 can keep constant temperature after reaching the preset temperature, and has a self-temperature-limiting function, thereby better achieving a deicing function. Specifically, the preset temperature may be a preferable temperature for achieving the deicing effect.
The wind power blade provided by the embodiment of the invention has double deicing effects of electric heating deicing and an anti-icing coating, when the deicing is needed, the electric heating element 3 can be started, so that an ice layer on the surface of the blade starts to melt, and liquid drops formed after melting cannot be attached to the blade under the action of the hydrophobic layer 2, thereby achieving the deicing effect. In addition, can also detect the temperature in the blade through detection module 4, control module 5 can be according to the temperature of detection module 4 feedback and the size of predetermineeing the temperature, control electric heating element 3's heating or stop heating, thereby realized that this electric heating element 3 can be constant temperature after reaching predetermineeing the temperature, self-limiting temperature function has, thereby realized deicing effect better, the aerodynamic lift of blade has been promoted, the aerodynamic resistance has been reduced, the performance and the life of blade have been guaranteed, still guaranteed the symmetry of pneumatics and quality, the loss of generated energy has still been reduced.
In an alternative embodiment, the electric heating element 3 may include a plurality of electric heating films connected to the control module 5, the plurality of electric heating films may be arranged side by side along the length direction of the windward shell 11 at the tip portion inside the windward shell 11, and the total length of the electric heating films may be greater than or equal to 1/3 of the length of the windward shell 11.
Because the blade tip part of the windward side of the blade is easy to freeze, in the embodiment, the plurality of electric heating films are arranged at the blade tip part in the windward side shell 11 side by side, and the total length of the electric heating films can be greater than or equal to 1/3 of the length of the windward side shell 11, so that the deicing effect of the electric heating element 3 is ensured, the cost is better reduced, and the energy consumption is saved. Wherein, the electric heat membrane specifically can adopt graphite alkene electric heat membrane, and it is made through many processes such as printing, hot pressing through electrically conductive graphite, metal current-carrying strip, and its thickness can be: 0.05 mm-0.5 mm.
In an alternative embodiment, the detection module 4 may include a plurality of temperature sensors connected to the control module 5, and the plurality of temperature sensors may be arranged at intervals along the length direction of the cavity between the windward casing 11 and the leeward casing 12, and located at the tip of the body 1.
In the above embodiment, through setting gradually a plurality of temperature sensor at the apex position of blade for control module 5 can judge its and the size of predetermineeing the temperature according to the temperature value of a plurality of temperature sensor feedback, and whether start-up heating of electric heat membrane according to the judged result, has realized detection module 4 to the multiple spot control of temperature in the blade, has improved temperature control's accuracy, thereby has improved electric heat deicing effect.
In an alternative embodiment, the windward side housing 11 may be further vacuum-filled with a protective film, and the protective film covers the outside of the electric heating element 3. Specifically, the protection film is coated outside the electric heating film, and the protection film can be made of materials such as PET, PBT, PE or PVC and the like so as to prevent the electric heating film from generating electric leakage.
The embodiment of the invention also provides a wind generating set which comprises the wind power blade.
The wind generating set provided by the embodiment of the invention comprises the wind power blade, and the hydrophobic layers 2 are arranged on the outer surfaces of the windward side shell 11 and the leeward side shell 12 of the wind power blade, so that liquid drops can bounce off the surface of the blade before being frozen, and the possibility of freezing the blade is reduced. Through vacuum infusion electric heating element 3 in windward side casing 11 for the blade is under the condition of ultra-low temperature environment or shut down, and when the blade surface was covered by the ice sheet, can start electric heating element 3, so that the ice sheet on blade surface begins to melt, and the liquid drop that forms after melting is under the effect of hydrophobic layer 2 and can't be attached to on the blade, thereby has reached the effect of deicing. In addition, can also detect the temperature in the blade through detection module 4, control module 5 can be according to the temperature of detection module 4 feedback and the size of predetermineeing the temperature, control electric heating element 3's heating or stop heating, thereby realized that this electric heating element 3 can be constant temperature after reaching predetermineeing the temperature, self-limiting temperature function has, thereby realized deicing effect better, the aerodynamic lift of blade has been promoted, the aerodynamic resistance has been reduced, the performance and the life of blade have been guaranteed, still guaranteed the symmetry of pneumatics and quality, the loss of generated energy has still been reduced.
The embodiment of the invention also provides a manufacturing method of the wind power blade, which is applied to the wind power blade and can comprise the following steps, and refer to fig. 1 and fig. 2.
And S1, laying the electric heating elements 3 on the windward side of the upper blade of the die paved with the auxiliary materials.
In the implementation of the invention, before laying the electric heating element 3, a piece of demoulding cloth can be laid in the mould, which specifically comprises the following steps: and (3) unfolding the inner parting line of the demolding cloth with a certain width along the front edge and the rear edge, reserving a certain width in the mold cavity, turning out the other inner parting lines, flattening the inner parting lines section by hand, and fixing the inner parting lines by glue spraying so as to facilitate demolding of the molded blade. Then paving a continuous felt, which can be specifically as follows: the method is characterized in that the whole meter mark of the mold is used as a reference in the axial direction, the chord direction is used as a reference with the parting line in the rear edge, a certain width continuous felt is paved after a certain distance is measured in a cavity, glue spraying points are used for spraying and fixing, after the continuous felt is paved, a layer of demolding cloth is paved on the surface, the demolding cloth completely covers the continuous felt, the wettability is improved, the whitening phenomenon on the surface of the blade is avoided, and the quality of the blade is improved. After the de-molding cloth and the continuous felt are laid, the electric heating element 3 is laid.
S2, laying a first glass fiber cloth, a core material and a second glass fiber cloth on the electric heating element 3 in sequence.
Wherein, in the process of laying the first glass fiber cloth, the roller can be used for rolling or the hairbrush with a rod can be used for driving the whole fiber cloth in the bag, the phenomena of protrusion, fold, impurity inclusion and the like are forbidden, the laying of the next layer can be carried out after the previous layer is laid to be qualified, and each layer is tightly attached to the previous layer and tightly attached to the mold. Then, paving a core material, which specifically can be as follows: the main beam can be positioned according to the design size, then the core materials are paved, the paving of PVC and balsa wood is included, the core materials and the core materials are tightly attached, and gaps are reduced. After the core material is laid, the second glass fiber cloth can be laid, and specifically, the step of laying the second glass fiber part can be the same as the step of laying the first glass fiber part, so as to ensure that the second glass fiber cloth is laid smoothly without wrinkles.
After step S2, the manufacturing method may further include a step of laying an auxiliary material, specifically, laying a release fabric, a release film, a suction blanket, or the like.
S3, arranging a glue injection pipeline and a vacuum system, and performing vacuum infusion on the auxiliary material, the electric heating element 3, the first glass fiber cloth, the core material and the second glass fiber cloth to obtain the blade shell.
The specific steps of arranging the glue injection pipeline and the vacuum system can refer to the vacuum infusion process steps in the prior art, and are not described in detail here. After vacuum infusion, each layer of the structure of the windward shell 11 sequentially comprises glass fiber reinforced plastic 6, a core material 7, glass fiber reinforced plastic 6, an electric heating element 3 and glass fiber reinforced plastic 6 from inside to outside.
The blade shell obtained here is the windward shell 11, and the leeward shell 12 can be obtained by the same procedure as above except for the step of laying the electric heating elements 3.
And S4, connecting the detection module 4 and the electrothermal element 3 with the control module 5 respectively.
The control module 5 may be an additional controller separately provided, and in the embodiment of the present invention, the control module 5 may adopt a control cabinet of the wind turbine generator system itself. In this step, can be connected detection module 4 and electric heating element 3 with wind generating set's switch board, in order to realize that detection module 4 detects the temperature in the body 1, control module 5 is according to the temperature of detection module 4 feedback, judge the size of this temperature and preset temperature, if this temperature is less than preset temperature, then control electric heating element 3 and heat, if this temperature is greater than or equal to preset temperature, then control electric heating element 3 and stop heating, thereby make electric heating element 3 can be constant temperature after reaching preset temperature, have the self-limiting temperature function, and then realize deicing function better. Specifically, the preset temperature may be a preferable temperature for achieving the deicing effect.
In this step, detection module 4 can include a plurality of temperature sensor, and this a plurality of temperature sensor can be installed in the die cavity between windward side casing 11 and leeward side casing 12 along body 1's length direction interval, and be located body 1's apex position, so that control module 5 can judge its and the size of predetermineeing the temperature according to the temperature value of a plurality of temperature sensor feedbacks, and whether start-up heating according to the judged result control electric heat membrane, the multiple spot control of detection module 4 to the temperature in the blade has been realized, the accuracy of temperature control has been improved, thereby the electric heat deicing effect has been improved.
S5, coating the hydrophobic layer 2 on the blade shell.
The hydrophobic layer 2 can be polyurethane finish with super-hydrophobicity, fluorocarbon finish or epoxy resin finish and the like. Moreover, when the hydrophobic layer 2 is coated on the blade shell, finish paint needs to be sprayed or roll-coated on the whole front edge of the blade shell in advance and leveled for 10 minutes, and then finish paint spraying or roll-coating on the surface and the front edge of the whole blade shell is carried out, so that the anti-icing effect of the front edge of the blade shell is ensured. In particular, the hydrophobic layer 2 may be sprayed or roll-coated to a thickness of 50-100 um.
In an alternative embodiment, the electric heating element 3 may include a plurality of electric heating films connected to the control module 5, and the step S1 may specifically include: a plurality of electric heating films are laid at the tip part of the windward side of the blade on the die side by side, and the total length of the electric heating films can be larger than or equal to 1/3 of the total length of the blade.
Because the blade tip part of the windward side of the blade is easy to freeze, in the embodiment, the plurality of electric heating films are arranged at the blade tip part in the windward side shell 11 side by side, and the total length of the electric heating films can be greater than or equal to 1/3 of the length of the windward side shell 11, so that the deicing effect of the electric heating element 3 is ensured, the cost is better reduced, and the energy consumption is saved. Wherein, the electric heat membrane specifically can adopt graphite alkene electric heat membrane, and it is made through many processes such as printing, hot pressing through electrically conductive graphite, metal current-carrying strip, and its thickness can be: 0.05 mm-0.5 mm.
In an alternative embodiment, before step S3, the manufacturing method may further include the steps of:
through mounting holes are formed in the first glass fiber cloth, the core material and the second glass fiber cloth; pre-burying a pipe body in the mounting hole; the cable of the electric heating element 3 penetrates out of the pipe body, and the pipe body is plugged by adopting a hole sealing material so as to avoid glue entering the pipe body during pouring.
In the above embodiment, the installation hole can be opened according to the position of the electric heating film, so that the cable can be prevented from being bent. The pipe body can be a plastic pipe, and the hole sealing material can be soft hole sealing material to the cable of electric heat membrane can be worn out in the plastic pipe, so that the cable of electric heat membrane can wear out to the die cavity in the casing, so that the electric heat membrane is connected with wind generating set's switch board.
In an optional embodiment, after the pipe body is sealed by the sealing material, the manufacturing method may further include: adopt vacuum bag membrane and sealed glue to carry out the cladding to the cable of wearing out from the body to avoid advancing gluey when pouring, thereby guarantee the normal use of cable. Specifically, can take one section vacuum bag membrane (the size of vacuum bag membrane can be adjusted according to actual conditions), and paste round joint strip along its edge, then with the cable of vacuum bag membrane fifty percent discount and parcel electric heat membrane to tear joint strip insulated paper section by section from the fifty percent discount, paste and hold between the fingers the reality, reuse hand extrusion vacuum bag, confirm no gas leakage phenomenon.
In an alternative embodiment, after step S1, the manufacturing method may further include: a protective film is laid on the electric heating element 3, specifically, the protective film is laid on the electric heating film, and the protective film can be made of materials such as PET, PBT, PE or PVC and the like so as to prevent the electric heating film from generating electric leakage.
In an optional embodiment, before step S5, the manufacturing method may further include: a primer layer is coated on the blade shell to improve the overall strength of the blade shell, and meanwhile, the adhesive force of the hydrophobic layer 2 on the shell can be improved. Specifically, the primer layer may be a urethane primer, an epoxy zinc-rich primer, an epoxy zinc phosphate primer, a fluorocarbon primer, or the like. In addition, in order to ensure the overall coverage effect of the primer on the blade shell, when the primer layer is coated, the primer is firstly coated in advance by roller coating or blade coating once on the front edge region and the rear edge region of the blade shell, the primer covers the whole front edge region and the whole rear edge region (from the blade root to the blade tip), especially the maximum chord length region of the blade must be ensured to cover the whole rear edge region and the putty region, and when the primer is sprayed on all the hand pasting, repairing and putty coating regions, the primer is coated by roller coating (the primer can be coated according to pinholes and flatness) once on the required regions.
In an alternative embodiment, before the step of coating the primer layer on the blade shell, the manufacturing method may further include: a putty repair step and a pin-hole putty repair step to facilitate the application of the primers and topcoat described above. Wherein, the putty repairing steps can be specifically as follows: horizontally placing the blade shell, uniformly scraping the large putty to a repair area from the blade root to the blade tip direction, along the chord direction and from the lower side to the higher side by using a glass fiber reinforced plastic scraper, and manufacturing a molded line of the front edge by using a plastic scraper; and (3) for the uneven transition area of the molded surface, repeatedly scraping and coating putty for modification, wherein the putty can be scraped and coated for the next time after each time of curing and polishing the putty. The pinhole putty repairing steps can specifically be as follows: the needle hole area on the outer surface of the whole blade shell is mainly repaired by a repair type putty repair area. Grinding requirements: after the pinhole putty is cured, the surface of the pinhole putty is integrally polished once by using 180-mesh abrasive paper, so that no scratch is ensured, and the pinhole putty is in smooth transition with the surrounding molded surface. After the blade shell obtained after vacuum infusion is subjected to the putty repairing step, the pinhole putty repairing step, the primer coating step and the hydrophobic layer coating step 2, all the layers of structures of the blade shell sequentially comprise glass fiber reinforced plastic 6, a core material 7, glass fiber reinforced plastic 6, an electric heating element 3, glass fiber reinforced plastic 6, a putty layer 8, a primer layer 9 and a hydrophobic layer 2 from inside to outside.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims (10)

1. A wind turbine blade, comprising:
the body comprises a windward shell and a leeward shell which are mutually butted, hydrophobic layers are arranged on the outer surfaces of the windward shell and the leeward shell, and an electric heating element is filled in the windward shell in a vacuum manner;
the detection module is arranged in a cavity between the windward side shell and the leeward side shell and is used for detecting the temperature in the body;
and the control module is respectively connected with the electric heating element and the detection module.
2. Wind turbine blade according to claim 1,
the electric heating element comprises a plurality of electric heating films connected with the control module, the electric heating films are arranged at the blade tip part in the windward side shell side by side along the length direction of the windward side shell, and the total length of the electric heating films is greater than or equal to 1/3 of the length of the windward side shell.
3. Wind turbine blade according to claim 1,
the detection module comprises a plurality of temperature sensors connected with the control module, and the temperature sensors are arranged at intervals along the length direction of the cavity and are positioned at the blade tip part of the body.
4. Wind turbine blade according to claim 1,
and a protective film is poured into the windward side shell in a vacuum manner and is coated outside the electric heating element.
5. A wind turbine generator set, comprising:
the wind blade of any of claims 1 to 4.
6. A manufacturing method of a wind power blade, applied to the wind power blade of any one of claims 1 to 4, characterized by comprising:
laying an electric heating element on the windward side of the upper blade of the die paved with the auxiliary material;
sequentially laying first glass fiber cloth, a core material and second glass fiber cloth on the electric heating element;
arranging an adhesive injection pipeline and a vacuum system, and performing vacuum infusion on the auxiliary material, the electric heating element, the first glass fiber cloth, the core material and the second glass fiber cloth to obtain a blade shell;
the detection module and the electric heating element are respectively connected with the control module;
a hydrophobic layer is applied on the blade shell.
7. The manufacturing method according to claim 6, wherein the electric heating elements comprise a plurality of electric heating films connected with the control module, and the laying of the electric heating elements on the mold with the auxiliary material laid thereon specifically comprises:
and a plurality of electric heating films are laid at the tip part of the windward side of the blade on the die side by side, and the total length of the plurality of electric heating films is greater than or equal to 1/3 of the total length of the blade.
8. The method of manufacturing of claim 6, wherein prior to the disposing of the glue injection line and the vacuum system, the method further comprises:
through mounting holes are formed in the first glass fiber cloth, the core material and the second glass fiber cloth;
pre-burying a pipe body in the mounting hole;
and penetrating out the cable of the electric heating element through the pipe body, and plugging the pipe body by adopting a hole sealing material.
9. The method of manufacturing of claim 8, wherein after the plugging the tubular body with the plugging material, the method further comprises:
and coating the cable penetrating out of the tube body by adopting a vacuum bag film and sealant.
10. The method of manufacturing according to claim 6, wherein after the laying of the electrical heating elements on the windward side of the blade on the mold with the laid auxiliary material, the method further comprises:
laying a protective film on the electric heating element;
before said applying a hydrophobic layer on the blade shell, the method comprises:
and coating a primer layer on the blade shell.
CN202011287872.2A 2020-11-17 2020-11-17 Wind power blade, wind generating set and manufacturing method of wind power blade Pending CN112324612A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011287872.2A CN112324612A (en) 2020-11-17 2020-11-17 Wind power blade, wind generating set and manufacturing method of wind power blade

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011287872.2A CN112324612A (en) 2020-11-17 2020-11-17 Wind power blade, wind generating set and manufacturing method of wind power blade

Publications (1)

Publication Number Publication Date
CN112324612A true CN112324612A (en) 2021-02-05

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202011287872.2A Pending CN112324612A (en) 2020-11-17 2020-11-17 Wind power blade, wind generating set and manufacturing method of wind power blade

Country Status (1)

Country Link
CN (1) CN112324612A (en)

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