CN103277265B - Anti-icing wind power blade and preparation method of anti-icing wind power blade - Google Patents
Anti-icing wind power blade and preparation method of anti-icing wind power blade Download PDFInfo
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- CN103277265B CN103277265B CN201310210258.XA CN201310210258A CN103277265B CN 103277265 B CN103277265 B CN 103277265B CN 201310210258 A CN201310210258 A CN 201310210258A CN 103277265 B CN103277265 B CN 103277265B
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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
- 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
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- Y02E10/72—Wind turbines with rotation axis in wind direction
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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
- 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
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Abstract
The invention discloses an anti-icing wind power blade and a preparation method of the anti-icing wind power blade. The anti-icing wind power blade comprises a monitoring system, a peripheral power supply and a blade body provided with a macromolecule electrothermal film, wherein the macromolecule electrothermal film is arranged between the surface of a suction surface shell body and the surface of a pressure surface shell body of the anti-icing wind power blade or between shell body layers of the anti-icing wind power blade in a clamped mode, and the macromolecule electrothermal film is controlled by the monitoring system through a wire to be connected or disconnected with the peripheral power supply. At the time of operation, the monitoring system monitors icing parameters of an environment where the blade body is located, the peripheral power supply is connected when the icing parameters meet preset icing conditions, the macromolecule electrothermal film is powered on to emit heat, the heat is transmitted to the surface of the blade body, and the blade body is prevented from icing. According to the anti-icing wind power blade and the preparation method of the anti-icing wind power blade, the anti-icing wind power blade can be prevented from icing in an online mode under the condition of no machine halt, non-planned machine halts can be reduced, and wind energy utilization efficiency of a wind machine in frigid weather is improved. The anti-icing wind power blade is simple in preparation technology, high in operability, and free from extra complex processes and devices. The preparation method can be used for preparing a large anti-icing wind power blade. The anti-icing wind power blade and the preparation method of the anti-icing wind power blade are beneficial to popularization and implementation.
Description
Technical field
The present invention relates to a kind of wind electricity blade and preparation method thereof, is specifically a kind of anti-freeze wind electricity blade and preparation method thereof.
Background technique
Wind energy is extremely important and huge safety, the clear energy sources of reserves, and wind-power electricity generation is the principal mode of Wind Power Utilization.The wind resource of China is mainly distributed in area, three Norths (northeast, northwest, North China) and the very large coastal area of moisture in the world of ice and snow, and environment is extremely severe.When wind power generating set be arranged on these area time, when wind electricity blade runs under zero centigrade and subzero cryogenic conditions, as wet wet air, rainwater, ice and snow particularly run into supercooling water droplet time, can freezing phenomena be there is.The ice formation issues of pneumatic equipment blades made is one of principal element affecting its safety reliability.After wind electricity blade icing, leaf surface structure, balance, deadweight etc. are impacted, the aerofoil profile of pneumatic equipment blades made can be caused to change, affect the aerodynamic performance of wind energy conversion system, and then affect the working life of blade, directly threaten safety and the efficiency of unit.Also there is no the ripe anti-clearing ice technology of pneumatic equipment blades made at present, for wind electricity blade icing, generally take to shut down process, have impact on the normal operation of network system, limit the utilization to wind energy.Therefore, the anti-freeze technology studying cold area in winter particularly clammy regional wind electricity blade has great importance for the safety of wind energy turbine set and large scale wind power machine, economy, Effec-tive Function.
The problem that wind electricity blade freezes receives much attention for a long time always; Current existing solution comprises several as follows: one, adopt the anti-freeze method of logical hot air in circulation canal, or installs fixing microwave oscillator at the inner chamber of blade, utilizes microwave energy to heat composite material and deicing.The method, by the restriction of blade structure, needs the windward side of heat because the thermal conductivity of material is little and thickness is thicker, especially undesirable for large-scale blade deicing effect.If heating-up temperature is too high, the heat distortion temperature of blade resin used had high requirements and likely brings new problem, being difficult to promote in practice.What slow down after two, making blade form acceleration change oar by vane propeller-changing motor trembles, or installs vibrator on blade, makes the vibration at least partially of blade, shakes off the method for freezing on blade.But these methods due to vibration amplitude smaller, be difficult to the icing removal of root, if increase Oscillation Amplitude, larger impulsive load will be formed, whole wind powered generator system is impacted, reduce the working life of related components, thus reduce the safety and reliability of wind power generating set.Three, utilize and inflatable air bag is installed to realize anti-deicing in the leading edge of blade, but the inflation of air bag can change the air dynamic behaviour of aerofoil profile or blade, and itself can be easy to tired at some ambient conditions lower gasbag and lose efficacy.Four, adopt and in the leading edge of aerofoil profile, install metallic conductor utilize electric heating to carry out anti-deicing, the deicing efficiency of this de-icing method is higher, but the metallic conduction in this method knows from experience the path providing thunderbolt, easily causes blade be struck by lightning and lost efficacy.In addition, tend in addition by spraying hydrophobic coating to reduce surface hydrophilic performance to reach the method for anti-freeze object at blade surface, but effect is undesirable, can only play certain anti-freeze effect, does not reach complete non-icing object.
Summary of the invention
In order to solve above-mentioned the deficiencies in the prior art, the object of this invention is to provide a kind of automatic control heating device that energising is set in the outer surface near blade body, under the environment of temperature lower than apparent freezing point, can in the non-stop-machine situation of wind-driven generator heater blade body, realize the anti-freeze wind electricity blade of this blade body surface icing protection; Additionally provide the preparation method of this anti-freeze wind electricity blade simultaneously.
To achieve these goals, the present invention adopts following technological scheme, a kind of anti-freeze wind electricity blade, comprises supervisory system, the blade body be connected with wind-driven generator and power supply; The inner chamber of described blade body is docked by suction surface housing and pressure side housing and forms, and is connected with the shear web of this suction surface housing of a support and pressure side inner walls in its inner chamber; Its feature is: in the surface or its shell layer of described suction surface housing and described pressure side housing, be folded with the polymer electric heating membrane with external power control connection; Described supervisory system is divided into monitoring cell and control unit; Described monitoring cell is an environment humidity sensor and at least 1 blade surface temperature transducer; Wherein, above the cabin that environment humidity sensor is loaded on described wind-driven generator or on its wheel hub, described blade surface temperature transducer is loaded on described blade inlet edge and is provided with on the surface of shell of polymer electric heating membrane, monitors the temperature on ambient temperature residing for this blade body and humidity and blade body surface respectively; Described control unit is arranged in the engine room cover of described wind-driven generator, is preset with critical icing value and the ice-formation condition of environment described in this anti-freeze wind electricity blade in this control unit; When the ambient temperature and humidity monitored and blade surface temperature meet the described ice-formation condition of setting completely, control unit controls described power supply and is communicated with polymer electric heating membrane, to polymer electric heating membrane electrified regulation; When not meeting the ice-formation condition of setting any one of the ambient temperature and humidity monitored and blade surface temperature, control unit controls described power supply and polymer electric heating membrane disconnects, and stops its electrified regulation; Form described anti-freeze wind electricity blade.
Above-mentioned critical icing value comprises critical freezing temperature, critical icing humidity and critical protection temperature; Above-mentioned ice-formation condition be set as ambient temperature residing for this blade body lower than described critical freezing temperature, envionmental humidity higher than described critical icing humidity and blade surface temperature lower than described critical protection temperature.
Above-mentioned suction surface housing and pressure side housing are all for passing through the integrated sandwiched structural member of Vacuum infusion molding process by inside panel and the coated middle core of exterior skin; Wherein, exterior skin is identical with the thickness of inside panel, covers form by 2 ~ 3 layers of glass fiber cloth paving; Described polymer electric heating membrane is at the outer surface of described exterior skin or one-body molded with exterior skin between this exterior skin glass outer fibre cloth and the adjacent the 2nd layer of glass fiber cloth.
The side windward of above-mentioned blade body is blade inlet edge, and leeward side is trailing edge; Described polymer electric heating membrane at least covers the part area that described pressure side housing and described suction surface housing are positioned at this blade inlet edge; Wherein, polymer electric heating membrane at least spreads and covers 1, its shape and the blade shell region conformal covered; The thickness of every sheet polymer electric heating membrane is 0.2 ~ 1mm.
Above-mentioned polymer electric heating membrane paving covers multi-disc, every sheet polymer electric heating membrane is equipped with 2 electrodes; Be connected in parallel between multi-disc polymer electric heating membrane; The voltage of described power supply is 90V ~ 380V, and the specific power of every sheet polymer electric heating membrane in this voltage range is 100 ~ 1000W/m
2.
In above-mentioned monitoring cell, the signal that environment humidity sensor and blade surface temperature transducer are received by wireless communication mode is sent in control unit.Above-mentioned control unit is made up of humiture transducer, programmable logic controller (PLC) and the solid-state relay connected of sequentially contacting; Wherein
,humiture transducer receives ambient temperature signal and the envionmental humidity signal of blade surface temperature signal and the above-mentioned environment humidity sensor output exported by above-mentioned blade surface temperature transducer by built-in wireless receiver, is sent in programmable logic controller (PLC) after the physical signalling received converts electrical signal to by transmission ends; Wherein, ice-formation condition is preset in described programmable logic controller (PLC), and this ice-formation condition ambient temperature comprised residing for its blade is less than default critical freezing temperature value and ambient humidity is greater than default critical icing humidity value and blade surface temperature lower than critical protection temperature value
;if when the ambient temperature of described blade, ambient humidity and blade surface temperature meet above-mentioned ice-formation condition simultaneously, programmable logic controller (PLC) sends start signal by its output terminal to described solid-state relay, the contacting external power of this solid-state relay and the connection of polymer electric heating membrane; If when the ambient temperature of described blade or ambient humidity or blade surface temperature do not meet above-mentioned any one ice-formation condition, programmable logic controller (PLC) sends cut-off signals to solid-state relay, and this solid-state relay then disconnects the connection of external power and described polymer electric heating membrane.
To achieve these goals, present invention also offers a kind of preparation method of above-mentioned anti-freeze wind electricity blade, comprise step as follows:
1) with the composition component of the shaping described blade body of Vacuum infusion molding process; Comprise shear web, be provided with the suction surface housing of polymer electric heating membrane and pressure side housing;
2) by structure glue, shear web shaping for step 1), suction surface housing and pressure side case bonding are integrated, are shaped to the blank of described blade body; Repaired and at its blade inlet edge and trailing edge position respectively hand stick with paste glass-fiber-fabric and carry out reinforcement;
3) to step 2) root of blade body blank cuts and holes; Again at the external coating protective coating of its blade body;
4) by affixed for the wheel hub of the root of step 3) blade body and described wind-driven generator, and monitoring cell and control unit are installed thereon; Wherein, control unit is packed on the inwall of described cabin cover of wind power generator, in wheel hub and engine room cover generator amature coupling shaft on be fixedly mounted with a conducting slip ring; The main traverse line be connected with described polymer electric heating membrane is connected with the solid-state relay tip side established in described control unit and zero-power line respectively by this conducting slip ring, and connects and composes an energising or power-off loop by this solid-state relay and external power live wire;
Wherein, the polymer electric heating membrane in step 1) is at least 1, and its thickness is 0.2 ~ 1mm, and at least paving is overlying on described suction surface housing and described pressure side housing near the part area of leading edge.Polymer electric heating membrane paving is covered with multi-disc, can spread the surface being overlying on above-mentioned suction surface housing and the easy ice field of pressure side housing or whole housing; Multi-disc polymer electric heating membrane is respectively by being connected in parallel on two main traverse lines with the spur traverse that its two electrode is connected separately, and the periphery of adjacent 2 polymer electric heating membranes respectively leaves the space of 0 ~ 5mm.
Multi-disc polymer electric heating membrane also has the step every sheet polymer electric heating membrane and institute's fixed position thereof being numbered to sequence before paving is covered; Be laid in the outer surface of described exterior skin successively according to the position of its number sorting or formed between the glass outer fibre cloth of this exterior skin and the second layer glass fiber cloth be adjacent, by the suction surface housing at Vacuum infusion molding process and its place or pressure side housing one-body molded.
Monitoring cell in step 4) is arranged with environment humidity sensor and at least 1 blade surface temperature transducer; Wherein, above the cabin that environment humidity sensor is loaded on described wind-driven generator or on wheel hub, the ambient temperature residing for this blade body and ambient humidity is monitored; Blade surface temperature transducer is loaded on this blade body and is provided with on the position of polymer electric heating membrane, monitors the temperature on its blade body surface; The programmable logic controller (PLC) and humiture transducer that are connected in series with described solid-state relay is also provided with in above-mentioned control unit; Wherein, humiture transducer receives ambient temperature signal and the envionmental humidity signal of blade surface temperature signal and the described environment humidity sensor output exported by described blade surface temperature transducer, is sent in described programmable logic controller (PLC) after the physical signalling received converts electrical signal to by transmission ends; Described ice-formation condition is preset in described programmable logic controller (PLC), and this ice-formation condition ambient temperature comprised residing for described blade is less than default critical freezing temperature value and ambient humidity is greater than default critical icing humidity value and blade surface temperature lower than critical protection temperature value; If when the ambient temperature of described blade, ambient humidity and blade surface temperature meet described ice-formation condition simultaneously, programmable logic controller (PLC) sends start signal by its output terminal to described solid-state relay, and the tip side of this solid-state relay connects the connection of external power and polymer electric heating membrane; If when the ambient temperature of described blade or ambient humidity or blade surface temperature do not meet above-mentioned any one ice-formation condition, programmable logic controller (PLC) sends cut-off signals to described solid-state relay, and the tip side of this solid-state relay then disconnects the connection of external power and described polymer electric heating membrane.
Owing to have employed technique scheme, beneficial effect of the present invention is as follows: 1) anti-freeze wind electricity blade provided by the invention, polymer electric heating membrane is adopted to heat, the Zone Full that can cover blade shell surface layer or the nearly surface layer of blade shell exterior skin or the regional area easily frozen, polymer electric heating membrane heating evenly, heating efficiency is high and Security good, effectively realizes blade surface anti-freeze.2) polymer electric heating membrane and blade shell exterior skin by one-body molded together with resin-bonding, not fragile; Polymer electric heating membrane is continuous structure, even if local area is damaged, does not affect its overall use, can improve the working life of this blade.3) thickness of polymer electric heating membrane used is 0.2 ~ 1mm, more frivolous when being molded in blade exterior skin surface or exterior skin, only slightly increases leaf weight, can not produce harmful effect to the aerodynamic configuration of blade.4) polymer electric heating membrane of the present invention, its power on/off is controlled by supervisory system; This supervisory system monitoring ambient temperature at blade place and humidity and blade surface temperature, when the ambient temperature at blade place is less than default freezing temperature value and ambient humidity is greater than default icing humidity value, control power supply to be communicated with polymer electric heating membrane, electrified regulation polymer electric heating membrane, effectively prevents the surface of blade from freezing.Meanwhile, also can control polymer electric heating membrane and maintain heating in certain temperature range in the energized state, avoid intensification too high, protection blade resin and coating for surface protection are not damaged.5) the present invention can realize wind electricity blade anti-freeze online in non-stop-machine situation, greatly reduces the non-programmed halt of wind-driven generator, ensures that it provides lasting power supply under cold climate conditions, improves the wind energy utilization efficiency of wind energy conversion system.6) preparation method provided by the invention, when laying, polymer electric heating membrane is directly one-body molded by ripe Vacuum infusion molding process with blade shell, and without the need to additional complexity operation and use any large-scale and complicated device, technique simply, can be applicable.
Accompanying drawing explanation
Fig. 1 is the circuit connection structure schematic diagram of the anti-freeze wind electricity blade of the present invention.
Fig. 2 be the anti-freeze wind electricity blade of the present invention along long to overall structure appearance schematic diagram.
Fig. 3 be Fig. 2 A-A to cross-sectional view.
Fig. 4 is the B place partial structurtes enlarged view of Fig. 3.
Fig. 5 is the working principle schematic diagram between supervisory system, power supply and polymer electric heating membrane.
Fig. 6 is the moulding process flow chart of suction surface housing of the present invention or pressure side housing.
Embodiment
Anti-freeze wind electricity blade of the present invention, comprise supervisory system, the blade body be connected with wind-driven generator and power supply, the inner chamber of blade body is docked by suction surface housing and pressure side housing and forms, and is connected with the shear web of this suction surface housing of a support and pressure side inner walls in its inner chamber;
Wherein, in suction surface housing and the outer surface of pressure side housing or the layers of reinforcement of formation housing, polymer electric heating membrane is folded with; These polymer electric heating membrane two ends are provided with electrode, connect main traverse line be connected with external power by spur traverse;
Supervisory system is divided into monitoring cell and control unit; Monitoring cell is an environment humidity sensor and at least 1 blade surface temperature transducer; Wherein, environment humidity sensor be loaded on this wind-driven generator cabin above or on its wheel hub; Blade surface temperature transducer is loaded on above-mentioned blade inlet edge and is provided with on the surface of shell of polymer electric heating membrane; The temperature on ambient temperature and humidity residing for this blade body and blade body surface monitored respectively by environment humidity sensor and blade surface temperature transducer.
Control unit is arranged in the engine room cover of this wind-driven generator, and this control unit is made up of the humiture transducer be connected in series, programmable logic controller (PLC) (PLC) and solid-state relay; Wherein, humiture transducer real-time reception gathers the temperature signal of environment residing for this blade body, moisture signal and blade body surface temperature signal respectively by environment humidity sensor and blade surface temperature transducer; Humiture transducer is sent in PLC after converting the physical signalling of received temperature and humidity to standard electric signal, and PLC processes it by good program prepared in advance; When ambient temperature and ambient humidity and blade surface temperature reach default critical icing value and ice-formation condition simultaneously, DC24V voltage triggered solid-state relay is exported after PLC process, thus control power supply and polymer electric heating membrane are connected, to polymer electric heating membrane electrified regulation; Disappear once when blade surface temperature higher than critical protection temperature or ice-formation condition, when namely not meeting the ice-formation condition of setting any one of the ambient temperature of blade, ambient humidity and blade surface temperature, output contact is turned off after PLC process, solid-state relay is quit work, thus deenergization, no longer heat to polymer electric heating membrane; Form described anti-freeze wind electricity blade thus.
Wherein, good program prepared in advance is critical icing value for this anti-freeze wind electricity blade of different environment sets and ice-formation condition; Critical icing value comprises critical freezing temperature, critical icing humidity and critical protection temperature; Ice-formation condition be set as ambient temperature lower than critical freezing temperature, envionmental humidity higher than critical icing humidity and blade surface temperature lower than critical protection temperature.
Shear web is supported in the inner chamber of suction surface housing and pressure side housing docking formation, and three all can adopt conventional Vacuum infusion molding process shaping; And then above-mentioned adhering components is integrated the blade body described in formation by structure glue; The side windward of this blade body is blade inlet edge, and leeward side is trailing edge.
Wherein, suction surface housing and pressure side housing are all the sandwiched structural member by exterior skin and the coated middle core of inside panel; Wherein, exterior skin and inside panel are laid by 2 ~ 3 layers of glass fiber cloth and are formed; Polymer electric heating membrane exterior skin outer surface or be located between the glass outer fibre cloth of this exterior skin and adjacent second course glass fiber cloth, by infusion epoxy resin under vacuum condition or unsaturated polyester resin one-body molded.
Above-mentioned polymer electric heating membrane at least covers the part area that described pressure side housing and described suction surface housing are positioned at this blade inlet edge; This polymer electric heating membrane at least spreads and covers 1, its shape and the blade shell region conformal covered; The thickness of every sheet polymer electric heating membrane is 0.2 ~ 1mm.
When above-mentioned polymer electric heating membrane paving covers multi-disc, multi-disc polymer electric heating membrane is connected in parallel; The voltage of power supply used is 90V ~ 380V, and the specific power of every sheet polymer electric heating membrane in this voltage range is 100 ~ 1000W/m
2.
Present invention also offers a kind of preparation method of above-mentioned anti-freeze wind electricity blade, comprise step as follows:
1) with the composition component of the shaping described blade body of Vacuum infusion molding process; Comprise shear web, be provided with the suction surface housing of polymer electric heating membrane and pressure side housing;
2) by structure glue, shear web shaping for step 1), suction surface housing and pressure side case bonding are integrated, are shaped to the blank of described blade body; Repaired and at its blade inlet edge and trailing edge position respectively hand stick with paste glass-fiber-fabric and carry out reinforcement;
3) to step 2) root of reinforcement rear blade body cuts and holes; Again at the external coating protective coating of its blade body;
4) by affixed for the wheel hub of the root of step 3) blade body and described wind-driven generator, and monitoring cell and control unit are installed thereon; Wherein, control unit is packed on the inwall of described cabin cover of wind power generator, in wheel hub and engine room cover generator amature coupling shaft on be fixedly mounted with a conducting slip ring; The main traverse line be connected with polymer electric heating membrane is connected with the solid-state relay tip side established in control unit and zero-power line respectively by this conducting slip ring, and connects and composes an energising or power-off loop by this solid-state relay and external power live wire;
Wherein, the polymer electric heating membrane in step 1) is at least 1, and at least paving is overlying on described suction surface housing and described pressure side housing near the part area of leading edge; The thickness of every sheet polymer electric heating membrane is identical, is 0.2 ~ 1mm, it is connected to 2 electrodes, and every sheet polymer electric heating membrane is connected on two main traverse lines by the spur traverse connected with two electrode.
When polymer electric heating membrane paving covers multi-disc, the surface being overlying on above-mentioned suction surface housing and the easy ice field of pressure side housing or whole housing can be spread; Multi-disc polymer electric heating membrane is respectively by being connected in parallel on two main traverse lines with the spur traverse that its two electrode is connected separately, and the periphery of adjacent 2 polymer electric heating membranes can leave gap, also can be close to lay; Its gap is less than or equal to 5mm.
When paving covers multi-disc polymer electric heating membrane, each polymer electric heating membrane and position thereof are numbered sequence; Be laid in the outer surface of this exterior skin successively according to the special position of its number sorting or formed between the glass outer fibre cloth of this exterior skin and the second layer glass fiber cloth be adjacent, by the suction surface housing at Vacuum infusion molding process and its place or pressure side housing one-body molded.Every sheet polymer electric heating membrane is connected in parallel with two main traverse lines respectively by the spur traverse connected with its two electrode; Connected with external power by main traverse line again.
Vacuum infusion molding process used in step 1) is prior art, respectively shaping shear web, the suction surface housing being folded with polymer electric heating membrane and pressure side housing;
The suction surface housing of above-mentioned blade body and pressure side housing shaping time, polymer electric heating membrane paving be overlying on suction surface housing and pressure side housing near the part area of leading edge, the surface of easily ice field or whole suction surface housing and pressure side housing.
Structure glue used in step 3) is epoxy structural rubber; Step 3) protective coating used is the polyurethane protective coating system that blade is conventional.
Monitoring cell in step 4) is arranged with environment humidity sensor and at least 1 blade surface temperature transducer; Wherein, above the cabin that environment humidity sensor is loaded on described wind-driven generator or on wheel hub, the ambient temperature residing for this blade body and humidity is monitored; Blade surface temperature transducer is loaded on this blade body and is provided with on the position of polymer electric heating membrane, monitors the temperature on its blade body surface; The programmable logic controller (PLC) and humiture transducer that are connected in series with described solid-state relay is also provided with in above-mentioned control unit; Wherein, humiture transducer receives ambient temperature signal and the envionmental humidity signal of blade surface temperature signal and the described environment humidity sensor output exported by described blade surface temperature transducer, is sent in described programmable logic controller (PLC) after the physical signalling received converts electrical signal to by transmission ends; Described ice-formation condition is preset in described programmable logic controller (PLC), and this ice-formation condition ambient temperature comprised residing for described blade is less than default critical freezing temperature value and ambient humidity is greater than default critical icing humidity value and blade surface temperature lower than critical protection temperature value; If when the ambient temperature of described blade, ambient humidity and blade surface temperature meet described ice-formation condition simultaneously, programmable logic controller (PLC) sends start signal by its output terminal to described solid-state relay, and the tip side of this solid-state relay connects the connection of external power and polymer electric heating membrane; If when the ambient temperature of described blade or ambient humidity or blade surface temperature do not meet above-mentioned any one ice-formation condition, programmable logic controller (PLC) sends cut-off signals to described solid-state relay, and the tip side of this solid-state relay then disconnects the connection of external power and described polymer electric heating membrane.
Below in conjunction with accompanying drawing, technological scheme of the present invention is described in further detail.
As shown in Figure 1, Figure 2, Figure 3 shows, anti-freeze blade of the present invention comprises blade body 1, blade surface temperature transducer 2, environment humidity sensor 3, control unit 4, power supply 5, polymer electric heating membrane 6, electrode 7, main traverse line 8, spur traverse 9, suction surface housing 10, pressure side housing 11, shear web 12, blade inlet edge 13, trailing edge 14 and wire 16.
Wherein, blade body 1 is made up of by adopting epoxy structural rubber to be bonded as one suction surface housing 10, pressure side housing 11 and shear web 12; The side windward of this blade body 1 is blade inlet edge 13, and leeward side is trailing edge 14; Multi-disc polymer electric heating membrane 6 in parallel can be layed in the local of blade inlet edge 13 outer surface; Also the local between blade inlet edge 13 exterior skin outermost surface glass fiber cloth and the second layer glass fiber cloth be adjacent can be located in; at least covering blade suction surface housing and pressure side housing are near the part area of leading edge; by Vacuum infusion molding process and exterior skin one-body molded; polymer electric heating membrane 6 strengthens resin layer protection by outermost surface glass fiber cloth; it can be made from the invasion and attack of external environment, effectively improve the working life of blade body 1.
In this example, the polymer electric heating membrane 6 of 5 rectangles is provided with in suction surface housing, be layed in the position of blade inlet edge 13, the two ends of the side that every sheet polymer electric heating membrane 6 is parallel with length of blade direction are provided with 2 absolute electrodes 7, are connected on 2 main traverse lines 8 be connected with power supply 5 both positive and negative polarity by spur traverse 9; After 5 polymer electric heating membranes 6 are in parallel and power supply 5 form primary Ioops; Power supply 5 is connected with control unit 4 by wire 16; Different according to the position that blade body is easily frozen, polymer electric heating membrane 6 can be set to rectangle, also can be other arbitrary shape with blade shell surface layer conformal.Leave gap between adjacent two panels polymer electric heating membrane 6, also can dock completely.
The shape of multi-disc polymer electric heating membrane 6 can be identical with size, also can be different, and in this example, polymer electric heating membrane 6 is rectangular shape, at the two ends of each polymer electric heating membrane one side, electrode 7 is housed respectively; The electrode of multi-disc polymer electric heating membrane 6 is drawn respectively by spur traverse 9 and is connected in parallel with two main traverse lines 8; Article two, main traverse line 8 is connected with solid-state relay 43 tip side established in control unit 4 and zero-power line respectively by the conducting slip ring be packed on the coupling shaft of generator amature in wheel hub and engine room cover, and connects and composes an energising or power-off loop by this solid-state relay and external power live wire.The model that conducting slip ring used in the present embodiment selects Sen Ruipu Electronics Co., Ltd. of Shenzhen to produce is the conducting slip ring of SNF030-0330.
In pressure side housing in the present embodiment, polymer electric heating membrane 6, monitoring cell 2,3 and connection are with identical in suction surface housing and position corresponding.
The present invention's supply voltage used is 90 ~ 380V, in this voltage range, is molded into the specific power of the polymer electric heating membrane in blade at 100 ~ 1000W/m
2between.Different according to the risk of icing degree of the leaf area at every sheet polymer electric heating membrane place, the specific power of the polymer electric heating membrane in each region can be set to identical or different, the polymer electric heating membrane that the region that risk of icing is higher can adopt specific power relatively large, and the low region of risk of icing adopts the polymer electric heating membrane that specific power is lower.When ABAP Adapter is 90V, the specific power of the polymer electric heating membrane in blade table surface layer is minimum is no more than 100 W/m
2, when ABAP Adapter is 380V, the specific power of the polymer electric heating membrane in blade table surface layer is maximum is no more than 1000 W/m
2.
Suction surface housing 10 and pressure side housing 11 are the sandwiched structural member of exterior skin and the coated middle core of inside panel.The exterior skin forming blade shell is identical with inside panel thickness, is equipped with 2 ~ 3 layers of glass fiber cloth separately.
Sandwiched structure between exterior skin and inside panel comprises conventional the blade main bearing beam, cork wood sandwich material and the PVC sandwich material that use.
Blade surface temperature transducer 2 and environment humidity sensor 3 form monitoring cell, wherein blade surface temperature transducer 2 is at least equipped with 1,4 are equipped with in this example, suction surface housing 10 and pressure side housing 11 are respectively equipped with 2, are contained in blade inlet edge 13 respectively and are provided with on the surface of the exterior skin of polymer electric heating membrane 6; Environment humidity sensor 3 is contained in outside the cabin of wind-driven generator, also can be contained on the wheel hub of wind-driven generator; Blade surface temperature transducer 2 and environment humidity sensor 3 gather the temperature-humidity signal of environment residing for blade body surface temperature signal and this blade body respectively, and the signal of collection is sent in control unit 4 by the mode of wireless telecommunications, the break-make of power supply 5 and polymer electric heating membrane 6 is controlled by control unit 4.
As shown in Figure 4, be the partial structurtes enlarged view of B point in Fig. 3; Wherein, suction surface housing is identical with the structure of pressure side housing, forms by exterior skin B1, therebetween core configuration layer B2 and inside panel B3; Wherein, exterior skin B1 is identical with the laying depth of inside panel B3, all spreads the glass fiber cloth 15 that haves three layers; Therebetween core configuration layer B2 comprises conventional the blade main bearing beam, cork wood sandwich material and the PVC sandwich material that use.
Its forming principle is: be between the second layer glass fiber cloth that is adjacent of exterior skin glass outer fibre cloth 15 that the polymer electric heating membrane 6 of 0.3mm is folded in blade inlet edge by 1 layer thickness, and then outermost for its exterior skin glass fiber cloth 15, polymer electric heating membrane 6, second layer glass fiber cloth and other reinforcing material being adopted existing Vacuum infusion molding process one-body molded is the suction surface housing of this blade or pressure side housing; Wherein, the resin used in Vacuum infusion molding process is epoxy resin; Also unsaturated polyester resin alternate collar epoxy resins can be used.
Be separated by owing to only having 1 layer of glass fiber cloth 15 between polymer electric heating membrane 6 and the outer surface of blade shell exterior skin, like this when electrified regulation, the heat of polymer electric heating membrane 6 radiation can be delivered to blade surface fast, and it is less to the heat of blade interior transmission loss, thus the raising efficiency of heating surface, avoid energy loss; The exterior skin of polymer electric heating membrane 6 and blade body combines together; the outer surface of polymer electric heating membrane 6 has 1 layer of glass fiber cloth to strengthen resin layer protection; when avoiding the later stage to repair polishing and coating protection coating, damage is caused to polymer electric heating membrane 6, the working life of polymer electric heating membrane 6 can be extended.In addition, polymer electric heating membrane 6 also can be laid in the local of exterior skin outermost surface glass fiber cloth 15 outer surface; Except position, edge arranges except polymer electric heating membrane 6 in front of the blade, also can be different according to the risk of icing degree of this blade different parts, the position comparatively easily frozen at other arranges polymer electric heating membrane 6; Also can as required in the exterior skin layer of whole blade shell or exterior skin surface be paved with polymer electric heating membrane 6.
As shown in Figure 5, be the working principle schematic diagram between supervisory system of the present invention, power supply and polymer electric heating membrane.Power supply 5 and polymer electric heating membrane 6 are switched on or switched off and are controlled by supervisory system, and supervisory system is arranged with monitoring cell and control unit 4, and wherein, monitoring cell is arranged with environment humidity sensor 3 and at least 1 blade surface temperature transducer 2; Control unit 4 is made up of the humiture transducer 41 sequentially connected, PLC 42 and solid-state relay 43.
In present embodiment, control unit 4 is arranged in cabin cover of wind power generator; According to the specific working environment of anti-freeze wind electricity blade of the present invention, in control unit 4, set critical icing value and the ice-formation condition of this anti-freeze wind electricity blade in advance for varying environment; Critical icing value comprises critical freezing temperature, critical icing humidity and critical protection temperature; Ice-formation condition be set as ambient temperature lower than critical freezing temperature, envionmental humidity higher than critical icing humidity and blade surface temperature lower than critical protection temperature; When ambient temperature and humidity and blade surface temperature meet the ice-formation condition of setting simultaneously, the PLC 42 in control unit 4 sends open command to solid-state relay 43, controls contacting power supply 5 and the polymer electric heating membrane 6 of solid-state relay 43; Otherwise, then send shutoff instruction to solid-state relay 43, control being communicated with of its contact deenergization and polymer electric heating membrane 6.
Control power supply 5 to be communicated with polymer electric heating membrane 6 or the principle that disconnects is: blade surface temperature transducer 2 is provided with 4, symmetry is arranged on the suction surface housing and pressure side surface of shell that close blade inlet edge place easily freezes respectively; On the cabin that 1 environment humidity sensor 3 is arranged on wind-driven generator or be arranged on the wheel hub that is connected with the root of this blade body; Wherein, environment humidity sensor 3 gathers temperature and the relative moisture of blade place environment, blade surface temperature transducer 2 gathers the temperature of blade surface, and the signal data that each sensor is collected at any time is sent in control unit 4 by the mode of wireless telecommunications; Humiture transducer 41 output line access PLC 42 Analog input mModule; The each unit module of PLC 42 is connected by self-contained cable bus; Solid-state relay 43 input end is connected to PLC 42 digital output terminal, and solid-state relay 43 output terminal one interface connects power firestreak, and another interface connects the main traverse line be connected with polymer electric heating membrane 6.
The temperature signal of the blade surface that humiture transducer 41 real-time reception is sent by blade surface temperature transducer 2 and/or environment humidity sensor 3 and ambient temperature and humidity signal, its physical signalling is converted to the electrical signal of 4 ~ 20mA of standard, and its electrical signal is carried out analysis by PLC 42 judge and automatic contacting or open command assigned to solid-state relay 43; The contact of solid-state relay and with multiple polymer electric heating membrane and the main traverse line input end connect connect; When solid-state relay obtains going code, power supply and main traverse line are connected by contact, polymer electric heating membrane electrified regulation; Otherwise when solid-state relay obtains open command, power line is thrown off in contact, the connection of deenergization and main traverse line, and polymer electric heating membrane power-off stops heating.
In present embodiment, the critical icing value of setting is critical freezing temperature is 0 DEG C, critical icing humidity be 80% and critical protection temperature be 30 DEG C; Ice-formation condition is set as ambient temperature≤0 DEG C, envionmental humidity >=80%, and blade surface temperature <30 DEG C; When the ambient temperature monitored, envionmental humidity and blade surface temperature meet ice-formation condition simultaneously, DC24V voltage triggered solid-state relay 43 is exported after PLC 42 processes, thus control power supply 5 is connected, to polymer electric heating membrane 6 electrified regulation, and heat is delivered to the surface of blade, blade surface temperature rises, and prevents blade from freezing.
After switching on power, control unit is real-time reception blade surface temperature transducer 2 still, the output signal of environment humidity sensor 3 is also carried out analysis to it and is judged, when the blade surface temperature monitored, when ambient temperature and envionmental humidity have one not meet ice-formation condition, namely blade surface temperature higher than 30 DEG C or environment relative moisture lower than 80% or ambient temperature higher than 0 DEG C time, cut-off signals is exported after PLC 42 processes, solid-state relay 43 is quit work, thus control power supply 5 disconnects, stop heating polymer electric heating membrane, prevent blade surface temperature from rising to the too high resin to blade and protective coating has a negative impact or avoid environment ice-formation condition to disappear time polymer electric heating membrane 6 still work on to save power supply energy.
According to the specific working environment of blade, the critical icing value for varying environment wind electricity blade and ice-formation condition also can be set in control unit 4; When ambient temperature and humidity and blade surface temperature meet the ice-formation condition of setting simultaneously, control unit 4 controls power connection.
In monitoring cell in supervisory system of the present invention and control unit, each assembly used is commercially available prod; In the present embodiment, environment humidity sensor model used is the wireless humiture sensor of JCJ106; Blade surface temperature transducer 4 identical PT100-GPRS radio temperature sensors.Humiture transducer used adopts model to be KSW-R4 humiture transducer; PLC adopts the programmable logic controller (PLC) that SIEMENS produces, model is 224XP CN, 214-2AD23-OXD8, and G3NA-220B Omron solid-state relay selected by solid-state relay.
As shown in Figure 6: in the preparation method of the anti-freeze wind electricity blade of the present invention, step 1) utilize Vacuum infusion molding process shaping be folded with polymer electric heating membrane suction surface housing and the specific operation of pressure side housing as follows:
1., mould pretreatment; Comprise cleaning mould, repair smooth rear spraying releasing agent.
2., material prepares; Except blade shell shaping in
,outside the required glass fiber cloth of exterior skin, core, prefabricated girder, auxiliary material, select multi-disc polymer electric heating membrane, spur traverse and main traverse line; Wherein the shape of multi-disc polymer electric heating membrane, size and electrode extraction location preset according to treating that bunk is put; And the polymer electric heating membrane number sorting to desired location.
3., covered by exterior skin laying, polymer electric heating membrane paving, arranged main traverse line and connect high molecular electrothermal membrane electrode, the step of core and girder and inside panel laying;
First lay exterior skin glass fiber cloth and polymer electric heating membrane, outside in the glass fiber cloth of exterior skin is followed successively by 1 layer of band felt three axle glass fiber cloth, 1 layer of three axle glass fiber cloth and 1 layer of twin shaft glass fiber cloth.According to number order, every sheet polymer electric heating membrane is laid in corresponding position on blade mold successively according to design drawing during laying, the lay mode of polymer electric heating membrane is identical with the lay mode of exterior skin glass fiber cloth, guarantees polymer electric heating membrane and mould or exterior skin glass fiber cloth conformal and surperficial corrugationless.All polymer electric heating membranes of lay are connected in parallel, and the other end by every sheet polymer electric heating membrane the two poles of the earth spur traverse is welded on two main traverse lines.When polymer electric heating membrane is laid in the outside of exterior skin outermost surface glass fiber cloth, article two, main traverse line stretches out mould in the position of distance blade root 3 ~ 5m from leading edge, sealed separately near one section of mould leading edge and the part vacuum bag that stretches out mould by main traverse line, after ensureing the blade demoulding, main traverse line avoids leading edge adhesion zone from the position that exterior skin is drawn.Time in the middle of which floor glass fiber cloth that polymer electric heating membrane is laid in exterior skin, article two, main traverse line stretches out mould through the exterior skin glass fiber cloth below polymer electric heating membrane from leading edge in the position of distance blade root 3 ~ 5m, the part reached by main traverse line below exterior skin outermost surface glass fiber cloth seals separately with the part vacuum bag stretching out mould, in order to avoid this part is entered resin when pouring into and cannot be separated with blade shell after causing the demoulding, after guaranteeing the blade demoulding, main traverse line avoids leading edge adhesion zone from the position that exterior skin is drawn simultaneously.Guaranteeing polymer electric heating membrane and lay, exterior skin glass fiber cloth is all sturdy and after corrugationless with mould to leaf root part at main traverse line extraction location in its lower section, lay exterior skin other glass fiber cloth remaining, and then lay core and prefabricated girder, last lay inside panel glass fiber cloth.
4., lay auxiliary material system and gum-injecting port and vacuum pumping opening are set;
The demoulding cut is covered with the outer surface being layered on blade suction surface housing preshaped body and pressure side housing preshaped body, lay flow-guiding cloth, injected rubber hose and air pipe equal vacuum at release cloth upper surface and import moulding technology auxiliary material, and gum-injecting port and vacuum pumping opening are set in die cavity.
5., vacuum bag film seals and checks tightness;
Finally seal whole blade preshaped body and auxiliary material system by vacuum bag film, bleeding point is also connected with vacuum pump by seal pouring mouth, then vacuumizes and checks the tightness of closed system, guaranteeing that tightness reaches requirement.
6., prepare resin and pour into
Resin system is mixed and carries out deaeration process, then opening gum-injecting port adopts negative pressure of vacuum to be injected in the preshaped body of blade shell by resin system, after this formed body of resin thorough impregnation, close gum-injecting port, and continue to vacuumize the degree of vacuum kept in shaping closed system; Wherein resin can adopt epoxy resin or unsaturated polyester resin, best use epoxy resin.
7., solidifying and reprocessing
By the system of having poured into by setup program elevated cure until completion of cure, after having solidified, carry out suction surface housing and pressure side housing that the reprocessing such as the demoulding, finishing obtains blade.
Claims (9)
1. an anti-freeze wind electricity blade, comprises supervisory system, the blade body be connected with wind-driven generator and external power; The inner chamber of described blade body is docked by suction surface housing and pressure side housing and forms, and is connected with the shear web of this suction surface housing of a support and pressure side inner walls in its inner chamber; It is characterized in that: in the surface or its shell layer of described suction surface housing and described pressure side housing, be folded with the polymer electric heating membrane with external power control connection; Described supervisory system is divided into monitoring cell and control unit; Described monitoring cell is an environment humidity sensor and at least 1 blade surface temperature transducer; Wherein, above the cabin that environment humidity sensor is loaded on described wind-driven generator or on its wheel hub, described blade surface temperature transducer is loaded on blade inlet edge and is provided with on the surface of shell of polymer electric heating membrane, monitors the temperature on ambient temperature and humidity residing for this blade body and blade body surface respectively; Described control unit is arranged in the engine room cover of described wind-driven generator, is preset with critical icing value and the ice-formation condition of this anti-freeze wind electricity blade environment in this control unit; When the ambient temperature and humidity monitored and blade surface temperature meet the described ice-formation condition of setting completely, control unit controls described external power and is communicated with polymer electric heating membrane, to polymer electric heating membrane electrified regulation; When not meeting the described ice-formation condition of setting any one of the ambient temperature and humidity monitored and blade surface temperature, control unit controls described external power and polymer electric heating membrane disconnects, and stops its electrified regulation;
Described control unit is made up of humiture transducer, programmable logic controller (PLC) and the solid-state relay connected of sequentially contacting; Wherein, humiture transducer receives ambient temperature signal and the envionmental humidity signal of blade surface temperature signal and the described environment humidity sensor output exported by described blade surface temperature transducer, is sent in described programmable logic controller (PLC) after the physical signalling received converts electrical signal to by transmission ends; Described ice-formation condition is preset in described programmable logic controller (PLC), and this ice-formation condition ambient temperature comprised residing for described blade is less than default critical freezing temperature value and ambient humidity is greater than default critical icing humidity value and blade surface temperature lower than critical protection temperature value; If when the ambient temperature of described blade, ambient humidity and blade surface temperature meet described ice-formation condition simultaneously, programmable logic controller (PLC) sends start signal by its output terminal to described solid-state relay, the contacting external power of this solid-state relay and the connection of polymer electric heating membrane; If when not meeting above-mentioned ice-formation condition any one of the ambient temperature of described blade, ambient humidity and blade surface temperature, programmable logic controller (PLC) sends cut-off signals to described solid-state relay, and this solid-state relay then disconnects the connection of external power and described polymer electric heating membrane.
2. anti-freeze wind electricity blade as claimed in claim 1, is characterized in that: described critical icing value comprises critical freezing temperature value, critical icing humidity value and critical protection temperature value; Described ice-formation condition be set as ambient temperature residing for this blade body lower than critical freezing temperature value, envionmental humidity higher than critical icing humidity value and blade surface temperature lower than critical protection temperature value.
3. anti-freeze wind electricity blade as claimed in claim 2, is characterized in that: described suction surface housing and described pressure side housing are all for passing through the integrated sandwiched structural member of Vacuum infusion molding process by inside panel and the coated middle core of exterior skin; Wherein, exterior skin is identical with the thickness of inside panel, covers form by 2 ~ 3 layers of glass fiber cloth paving; Described polymer electric heating membrane at the outer surface of described exterior skin or between this exterior skin glass outer fibre cloth and the adjacent the 2nd layer of glass fiber cloth, polymer electric heating membrane and exterior skin one-body molded.
4. anti-freeze wind electricity blade as claimed in claim 3, is characterized in that: the side windward of described blade body is blade inlet edge, and leeward side is trailing edge; Described polymer electric heating membrane at least covers the part area that described pressure side housing and described suction surface housing are positioned at this blade inlet edge; This polymer electric heating membrane at least spreads and covers 1, its shape and the blade shell region conformal covered; The thickness of every sheet polymer electric heating membrane is 0.2 ~ 1mm.
5. anti-freeze wind electricity blade as claimed in claim 4, is characterized in that: described polymer electric heating membrane paving covers multi-disc, every sheet polymer electric heating membrane is equipped with 2 electrodes; Be connected in parallel between multi-disc polymer electric heating membrane; The voltage of described external power is 90V ~ 380V, and the specific power of every sheet polymer electric heating membrane in this voltage range is 100 ~ 1000W/m
2.
6. a preparation method for anti-freeze wind electricity blade described in any one of claim 1-5, comprises step as follows:
1) with the composition component of the shaping described blade body of Vacuum infusion molding process; Comprise shear web, be provided with the suction surface housing of polymer electric heating membrane and pressure side housing; Described polymer electric heating membrane is by being connected with main traverse line with the spur traverse that it connects;
2) by structure glue by step 1) shaping shear web, suction surface housing and pressure side case bonding be integrated, and is shaped to the blank of described blade body; Repaired and at its blade inlet edge and trailing edge position respectively hand stick with paste glass-fiber-fabric and carry out reinforcement;
3) to step 2) root of described blade body blank after reinforcement cuts and holes; Again at the external coating protective coating of its blade body;
4) by step 3) wheel hub of the root of blade body and described wind-driven generator is affixed, and on described wind-driven generator, monitoring cell and control unit are installed; Wherein, control unit is packed on the inwall of described cabin cover of wind power generator, in wheel hub and engine room cover generator amature coupling shaft on be fixedly mounted with a conducting slip ring; The main traverse line be connected with described polymer electric heating membrane is connected with the solid-state relay tip side established in described control unit and external power zero line respectively by this conducting slip ring, and connects and composes an energising or power-off loop by this solid-state relay and external power live wire;
Wherein, step 1) described in polymer electric heating membrane be at least 1, the thickness of every sheet polymer electric heating membrane is 0.2 ~ 1mm, and at least paving is overlying on described suction surface housing and described pressure side housing near the part area of leading edge.
7. preparation method as claimed in claim 6, is characterized in that: described polymer electric heating membrane paving is covered with multi-disc, and paving is overlying on the surface of described suction surface housing and the described easy ice field of pressure side housing or whole housing; Multi-disc polymer electric heating membrane is respectively by being connected in parallel on two main traverse lines with the spur traverse that its two electrode is connected separately, and the periphery of adjacent 2 polymer electric heating membranes respectively leaves the space of 0 ~ 5mm.
8. preparation method as claimed in claims 6 or 7, is characterized in that: step 4) described in monitoring cell time-sharing environment temperature and humidity sensor and at least 1 blade surface temperature transducer; Wherein, above the cabin that environment humidity sensor is loaded on described wind-driven generator or on wheel hub, the ambient temperature residing for this blade body and ambient humidity is monitored; Blade surface temperature transducer is loaded on this blade body and is provided with on the position of polymer electric heating membrane, and the temperature on the blade body surface of high score electric heating film is equipped with in monitoring; The programmable logic controller (PLC) and humiture transducer that are connected in series with described solid-state relay is also provided with in described control unit; Wherein, humiture transducer receives ambient temperature signal and the envionmental humidity signal of blade surface temperature signal and the described environment humidity sensor output exported by described blade surface temperature transducer, is sent in described programmable logic controller (PLC) after the physical signalling received converts electrical signal to by transmission ends; Described ice-formation condition is preset in described programmable logic controller (PLC), and this ice-formation condition ambient temperature comprised residing for described blade is less than default critical freezing temperature value and ambient humidity is greater than default critical icing humidity value and blade surface temperature lower than critical protection temperature value; If when the ambient temperature of described blade, ambient humidity and blade surface temperature meet described ice-formation condition simultaneously, programmable logic controller (PLC) sends start signal by its output terminal to described solid-state relay, and the tip side of this solid-state relay connects the connection of external power and polymer electric heating membrane; If when not meeting above-mentioned ice-formation condition any one of the ambient temperature of described blade, ambient humidity and blade surface temperature, programmable logic controller (PLC) sends cut-off signals to described solid-state relay, and the tip side of this solid-state relay then disconnects the connection of external power and described polymer electric heating membrane.
9. preparation method as claimed in claim 8, is characterized in that: polymer electric heating membrane described in multi-disc also has the step every sheet polymer electric heating membrane and institute's fixed position thereof being numbered to sequence before paving is covered; Be laid in the outer surface of exterior skin successively according to the position of its number sorting or formed between the glass outer fibre cloth of exterior skin and the second layer glass fiber cloth be adjacent, by Vacuum infusion molding process by the suction surface housing at the described polymer electric heating membrane that tiles successively and place or pressure side housing one-body molded.
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| CN104656512A (en) * | 2015-01-14 | 2015-05-27 | 风脉（武汉）可再生能源技术有限责任公司 | Fan hub environmental control system and control method thereof |
| EP3394439B1 (en) | 2015-12-23 | 2022-02-02 | Vestas Wind Systems A/S | Improved electro-thermal heating |
| CN105673361B (en) * | 2015-12-31 | 2018-07-13 | 东方电气风电有限公司 | Ice-melt heating structure of blade of wind-driven generator and preparation method thereof |
| CN106438226B (en) * | 2016-11-23 | 2019-02-26 | 重庆大学 | Circulation electric-heating for blade of wind-driven generator melts anti-icing equipment |
| CN106762392B (en) * | 2017-01-17 | 2023-06-06 | 河北工业大学 | Wind turbine blade and anti-icing and de-icing method |
| CN106949022A (en) * | 2017-05-11 | 2017-07-14 | 刘中威 | Recoverable electro-heat deicing aero-generator rotor blade and preparation method thereof |
| CN107829889B (en) * | 2017-11-20 | 2023-08-29 | 浙江运达风电股份有限公司 | Deicing control method and system for wind generating set |
| CN110198576A (en) * | 2018-02-27 | 2019-09-03 | 吴金珠 | Electrothermal chip structure, installation method, forming method and wind power generating set |
| CN112922792B (en) * | 2019-12-06 | 2022-07-08 | 北京金风科创风电设备有限公司 | Blade electrothermal composite film, blade, wind generating set and method for manufacturing blade |
| CN111237124B (en) * | 2020-02-19 | 2021-11-05 | 上海电气风电集团股份有限公司 | System integrating wind power blade leading edge protection and lightning stroke protection |
| CN112629093B (en) * | 2021-03-09 | 2021-07-02 | 中国空气动力研究与发展中心低速空气动力研究所 | Method for removing ice growing on surface of film hot knife and model |
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