CN212583885U - Anti-icing and de-icing device for wind power blade - Google Patents
Anti-icing and de-icing device for wind power blade Download PDFInfo
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- CN212583885U CN212583885U CN202020970946.1U CN202020970946U CN212583885U CN 212583885 U CN212583885 U CN 212583885U CN 202020970946 U CN202020970946 U CN 202020970946U CN 212583885 U CN212583885 U CN 212583885U
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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
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
Abstract
The utility model provides a wind-powered electricity generation blade ice-proof ice-melt device, including PTC heater, temperature measurement station and controller, the PTC heater sets up on the leading edge surface of wind-powered electricity generation blade, and the temperature measurement station sets up on wind-powered electricity generation blade, and the controller links to each other with temperature measurement station and PTC heater respectively, the utility model discloses utilize its PTC positive temperature coefficient's natural physical characteristic to realize rapid heating intensification, automatic constant temperature, automatic recovery's ice-proof ice-melt work, and have advantages such as corrosion-resistant, chemical stability, be suitable for long-term use, reinforcing aerogenerator's life.
Description
Technical Field
The utility model relates to a wind power generation technical field, concretely relates to wind-powered electricity generation blade anti-icing ice-melt device.
Background
At present, the traditional energy sources in the world are gradually reduced, and people generally worry about the exhaustion of non-renewable energy sources. The renewable energy wind energy is developed and utilized, and is more and more emphasized by various countries in the world, and the principle of wind power generation is that wind power is utilized to push wind power blades (namely wind power generator blades) to rotate, so as to drive a wind power generator, so that the wind energy can be converted into electric energy to enter a power grid, and the energy conversion and utilization process is completed. In China, wind power generation is used not only in regions with relatively suitable climate but also in low-temperature icing regions more and more. In actual operation, in a low-temperature environment, if the temperature is reduced to below zero, the wind power blade is very easy to freeze, so that the aerodynamic characteristics of the wind power blade are influenced by surface icing, the running torque of the blade and the load of a wind generating set are increased, the aerodynamic performance of the blade is reduced, the generating efficiency and the safety of the wind generating set are influenced to a great extent, further development even shutdown accidents of the wind generating set can be caused, and huge economic loss and resource waste are caused. After freezing, in order to ensure the safe operation, the system often has to be stopped for waiting, so that the loss of the power generation amount is caused. The problem of freezing in winter is widely existed, most areas (more than 25 degrees north latitude) in China are put into service wind driven generators, and the wind field income is influenced by freezing in winter more or less.
It is of great importance to research and develop economical and efficient methods for anti-icing and de-icing the blades of wind turbines. Several existing anti-icing and de-icing techniques include: the device comprises a warm air ice melting device, an electric heating film, a hydrophobic coating, a heating coating and the like, but the effect is not ideal, or the energy consumption is huge, and the generated power reaches more than 2%; or the ice melting effect is not good, and the ice melting can not be realized frequently.
SUMMERY OF THE UTILITY MODEL
The utility model provides a wind-powered electricity generation blade anti-icing ice-melt device, not only can effectively realize wind-powered electricity generation blade anti-icing and quick ice-melt, effectively protected the wind-powered electricity generation blade moreover, improved the life of fan.
The utility model discloses technical scheme as follows:
the anti-icing and de-icing device for the wind power blade is characterized by comprising a PTC heater, a temperature measuring point and a controller, wherein the PTC heater is arranged on the surface of the front edge of the wind power blade, the temperature measuring point is arranged on the wind power blade, and the controller is respectively connected with the temperature measuring point and the PTC heater.
Preferably, the PTC heater comprises a PTC heating element, a cable and an insulating film wrapped on the outer surface of the PTC heating element, the PTC heating element and the cable are connected in parallel to form a closed loop, a switch element is arranged on the loop, and the switch element is connected with the controller.
Preferably, the PTC heater is a PTC ceramic heater in which the PTC heating element is ceramic.
Preferably, the PTC heater is a PTC semiconductor heater in which the PTC heating element is a semiconductor.
Preferably, the PTC heater is a PTC conductive plastic heater in which the PTC heating element is conductive plastic.
Preferably, the temperature measuring points are a plurality of optical fiber temperature measuring points which are uniformly distributed on the wind power blade.
Preferably, the number of the PTC heaters is a plurality, and the PTC heaters are arranged on the surface of the front edge of the wind power blade in parallel along the length direction of the wind power blade.
Preferably, the PTC heaters and the temperature measuring points are uniformly distributed on each wind power blade of the wind driven generator.
Preferably, the integral laying thickness of the PTC heater and the temperature measuring point on the wind power blade is not more than 4 mm.
Preferably, the insulating film is an F46 polyimide film.
The technical effects of the utility model are as follows:
the utility model relates to a wind-powered electricity generation blade anti-icing ice-melt device, set up PTC heater on the leading edge surface of wind-powered electricity generation blade, and set up temperature measurement station and controller cooperation work, carry out blade temperature monitoring through the temperature measurement station on the blade, when the blade temperature is less than certain temperature (or reach the critical threshold value of icing) by controller control PTC heater start, heat the wind-powered electricity generation blade and realize the anti-icing of wind-powered electricity generation blade; if the wind power blade is frozen and the temperature monitored by the temperature measuring point is very low, the controller controls the PTC heater to start, and the wind power blade is heated to realize the quick ice melting of the wind power blade. The device of the utility model adopts the PTC heater, fully utilizes the PTC (Positive Temperature coefficient) characteristic, namely the natural physical characteristic of the positive Temperature coefficient, and can realize rapid Temperature rise through large current after the circuit is conducted, thereby effectively realizing the anti-icing and rapid ice melting of the wind power blade in winter; the PTC heater has a self-constant temperature characteristic, the resistance becomes infinite after the temperature of a heating object rises to a certain value, the circuit is automatically cut off, and the wind power blade is effectively protected; the PTC heater has self-recovery performance, the resistance naturally becomes small after the temperature of a heating object is reduced to a certain temperature, the circuit recovers, the heating state is recovered on the surface of the wind power blade, automatic control is realized, the PTC heater is automatically controlled to be heated and switched on and off after running by means of the characteristics of the self material, self-adaptive cold and hot balance is achieved, the controller is not required to be further controlled, and the labor cost is reduced. The device is suitable for ice prevention and rapid ice melting of fan blades in winter operation, can enable a wind turbine generator set to be operated in winter to keep a safe and stable power generation state, and greatly improves the economic benefit of a wind power station.
The utility model discloses wind-powered electricity generation blade anti-icing ice-melt device's core is the target that uses the PTC heater to realize rapid heating, rapid heating up, automatic constant temperature, automatic recovery, long-term use. Preferably, the utility model discloses wind-powered electricity generation blade anti-icing ice-melt device's PTC heater includes PTC heating element, cable and wrap up in the insulating film of PTC heating element surface, its structural characteristic is that PTC heating element circuit is parallelly connected, use F46 polyimide film to realize effective insulation, wherein, PTC heating element can be pottery, semiconductor or conductive plastic, PTC heater can adopt the PTC ceramic heater on the market promptly, PTC semiconductor heater or PTC conductive plastic heater, further has corrosion-resistant, the stable advantage of chemical property, insulating film is preferably F46 polyimide film, realize effective insulation, make aerogenerator keep effectual lightning protection state in service, keep operation equipment long-term service operation, and service life is prolonged.
Drawings
Fig. 1 is the utility model relates to a wind-powered electricity generation blade anti-icing ice-melt device's schematic structure diagram.
Fig. 2 is a schematic structural diagram of the PTC heater of the present invention.
Fig. 3 is the physical characteristic diagram of the PTC heater in the anti-icing and de-icing device for wind power blade of the present invention.
Fig. 4 is a schematic connection diagram of a controller in the anti-icing and de-icing device for wind power blades of the utility model.
The various reference numbers in the figures are listed below:
the device comprises a PTC heater, a PTC heating element, a cable, a polyimide film, a temperature measuring point, a controller, a wind power blade, a wind driven generator and an environment temperature measuring point, wherein the PTC heater is 1, the PTC heating element is 11, the cable is 12, the polyimide film is 13, the F46, the temperature measuring point is 2, the controller is 3, the wind power blade is 4, the wind driven generator is 5, and the.
Detailed Description
The present invention will be described with reference to the accompanying drawings.
The utility model relates to a wind-powered electricity generation blade anti-icing ice-melt device, as the structure shown in figure 1 for to the anti-icing and the quick ice-melt of wind-powered electricity generation blade 4 in aerogenerator 5, this wind-powered electricity generation blade anti-icing ice-melt device includes PTC heater 1, temperature measurement station 2 and controller 3, and PTC heater 1 sets up the leading edge surface at wind-powered electricity generation blade 4, and temperature measurement station 2 sets up on wind-powered electricity generation blade 4, and controller 7 links to each other with temperature measurement station 2 and PTC heater 1 respectively. The temperature measuring point 2 is responsible for monitoring the temperature of the fan blade 4 and providing a monitored temperature signal for the controller 3, when the monitored temperature of the fan blade 4 is lower than a certain temperature (or reaches an icing critical threshold), the controller 3 controls the PTC heater 1 to start, and the wind power blade 4 is heated to realize the anti-icing of the wind power blade 4; if the wind power blade 4 is frozen, the temperature monitored by the temperature measuring point 2 is very low at the moment, the controller 3 controls the PTC heater 1 to start, and the wind power blade 4 is heated to realize the rapid ice melting of the wind power blade 4. The utility model adopts the PTC heater, and can realize the prevention of the wind power blade 4 from freezing in winter by utilizing the natural physical characteristics; for the frozen wind power blade 4, the wind power blade 4 can be rapidly de-iced, so that the wind driven generator 5 can be normally put into operation.
Specifically, the measurement measuring points 2 are preferably a plurality of optical fiber temperature measuring points uniformly distributed on the wind power blade 4, and a plurality of PTC heaters 1 can also be adopted, and each PTC heater 1 is arranged on the front edge surface of the wind power blade 4 in parallel along the length direction of the wind power blade 4, that is, the arrangement mode of the PTC heaters 1 is arranged along the length direction of the fan blade 4 and keeps parallel; furthermore, the PTC heaters 1 and the temperature measuring points 2 can be uniformly distributed on each wind power blade 4 of the wind driven generator, and the overall laying thickness of the PTC heaters 1 and the temperature measuring points 2 on the wind power blade 4 is not more than 4 mm, so that the starting performance of the fan blade 4 is not affected.
Preferably, with reference to the schematic structural diagram shown in fig. 2, the PTC heater 1 includes a PTC heating element 11, a cable 12 and an insulating film wrapped on the outer surface of the PTC heating element 11, the PTC heating element 11 and the cable 12 are connected in parallel to form a closed loop, a switching element (not shown) is disposed on the closed loop and connected to the controller 7, and the PTC heating element 11 and the cable 12 are connected in parallel to realize effective heating of the wind turbine blade 4. Preferably, the PTC heating element 11 may be ceramic, semiconductor or conductive plastic, that is, the PTC heater 1 may be a PTC ceramic heater, a PTC semiconductor heater or a PTC conductive plastic heater, which has the advantages of corrosion resistance and stable chemical properties, and increases the service life of the wind turbine generator, and preferably, the insulating film makes the outer surface of the PTC heater effectively insulated, and the F46 polyimide film 13 may be used to keep the wind turbine generator in an effective lightning protection state during operation, keep the operation equipment in long-term operation, and increase the service life.
The utility model discloses utilize its PTC (positive Temperature coefficient) characteristic, physical characteristic chart as shown in figure 3, positive Temperature coefficient's natural physical characteristic promptly, realize anti-icing ice-melt work, specifically speaking, wind-powered electricity generation blade 4 is when the Temperature is less than zero degree environment, the circular telegram operation, the operation live voltage is 220V's alternating current, realize the power requirement of wind-powered electricity generation blade 4 anti-icing and ice-melt more than 40 meters, the connection schematic diagram of the controller as shown in figure 4, 3 actual connection PTC heater 1 of controller, Temperature measurement point 2, ambient Temperature measurement point 6 and wind-driven generator 5. And the environment temperature measuring point 6 is used for collecting the environment temperature and is arranged on the wind generating set. The controller 4 judges according to the temperature measured point 2 on the fan blade 4 and further combines the temperature collected by the environment temperature measured point 6. When the temperature of one of the measuring points is lower than zero degree, the PTC heater 1 at the measuring point part is started immediately.
Example one
The embodiment relates to an anti-icing process in the operation process of the wind power blade 4. The wind driven generator 5 operates in a winter environment, when the ambient temperature is lower than zero, the ambient temperature measuring point 6 and the temperature measuring point 2 on the fan blade 4 are responsible for collecting temperature signals and sending collected ambient temperature data and fan blade temperature data to the controller 4, when the two sent temperature data are lower than zero, the controller 3 sends an instruction to the PTC heater 1, the parallel circuit of the PTC heater 1 is connected, and the PTC heating elements 11 in the PTC heater 1 adopt the parallel circuit, so that the PTC heating elements 11 are all under the same voltage. The PTC heating element 11 is a high molecular polymer positive temperature coefficient heat-sensitive conductive material, and is generally composed of a polymer, conductive particles, and the like. After processing, the conductive particles form chain-like conductive paths in the polymer. When the PTC heating element 11 is at normal ambient temperature, it is in a low resistance state. As shown in fig. 3, the resistance value of the PTC heating element 11 increases stepwise with the increase in the temperature of the main body of the PTC heating element 11, and the resistance value increases as the temperature increases, so that the PTC heating element 11 rapidly increases in temperature after the parallel circuit is turned on, and when the temperature of the PTC heating element 11 increases, the polymer rapidly expands due to the heat generated by the heat, and the conductive path formed by the conductive particles is cut off, and the PTC heating element 11 assumes a high resistance state. The PTC heating element 11 has a sufficiently large resistance value, and the current is reduced to balance the heat generation amount and the heat dissipation amount of the PTC heating element 11, and the temperature does not rise any more until the maximum temperature is reached, and at this time, the temperature is between 40 and 50 degrees, and there is a difference depending on the ambient temperature. At the moment, the temperature is stable, and the heat is continuously output to the wind power blade 4 to prevent the wind power blade from being frozen, so that the anti-icing operation is realized. When the ambient temperature continues to decrease, the temperature of the PTC heating element 11 decreases, the resistance decreases, the polymer cools, the conductive particles re-form more conductive paths, the current increases, the temperature increases, and the next balance is reached. When the ambient temperature measuring point 6 and the temperature measuring point 2 on the fan blade 4 both reach above zero, the controller 3 sends out an instruction to stop the operation of the PTC heater 1.
Example two
The embodiment relates to an ice melting process of a wind power blade 4 in the operation process. The wind driven generator 5 operates in a winter environment, and the frozen wind power blades 4 are thick due to overlong downtime or other reasons. And (4) powering on to operate, and starting the controller 3 to work. And the environment temperature measuring point 6 and the temperature measuring point 2 on the wind power blade 4 are responsible for collecting temperature signals and sending collected environment temperature data and fan blade temperature data to the controller 4, when the two data are lower than zero, the controller 3 sends an instruction to the PTC heater 1, and the circuit of the PTC heater 1 is switched on. The PTC heating element 11 continues to heat up after the circuit is completed, but it takes a long time. When the temperature of the PTC heating element 11 rises to a certain level, the polymer rapidly expands due to the heat generated, and the conductive path formed by the conductive particles is cut off, so that the PTC heating element 11 is in a high resistance state. Until the PTC heating element 11 reaches a sufficiently large resistance, the current decreases, and the heat generation amount and the heat dissipation amount of the PTC heating element 11 are balanced, and the temperature does not rise any more. At this point, the temperature reached an extremely high value. This temperature can be set between 40-50 degrees, which can vary depending on the ambient temperature. At this moment, the temperature is stable, the heat can be guaranteed to be continuously output to the wind power blade 4 for ice melting, and meanwhile, the structure of the wind power blade 4 cannot be damaged. When the temperature measuring points 7 all reach above zero, the ice melting is finished completely, the ice melting can be started, the control system 8 sends an instruction to the fan 6, and the fan starts to be started. When the ambient temperature measuring point 6 and the temperature measuring point 2 on the fan blade 4 both reach above zero, the controller 3 sends out an instruction to stop the operation of the PTC heater 1.
The device has adopted the PTC heater, make full use of its PTC positive temperature coefficient's natural physical characteristic, compare with other heating material on the market, the PTC heater is used for wind-powered electricity generation blade anti-icing and ice-melt field, and its characteristic more accords with operation requirement, the concrete performance: 1, the temperature can be rapidly raised through large current after the circuit is conducted, and a heating body can reach more than 50 ℃ within 5 minutes, so that rapid anti-icing and ice melting are realized; 2, the PTC heater has a self-constant temperature characteristic. When the heating body reaches a certain temperature, the resistance becomes infinite, the circuit is cut off, and the wind power blade is effectively protected. The wind power blade is made of a composite material, and the temperature resistance is generally not more than 65 ℃, so that the PTC heater is very safe to use, even a protection circuit is not required to be added, and the safe operation is realized by the self characteristic; 3, the PTC heater has self-recovery characteristic, when the temperature of the heating element is reduced to a certain temperature, the resistance is naturally reduced, the circuit is recovered, and the surface of the wind power blade is recovered to be heated; 4, the PTC heater is corrosion-resistant, long in service life and extremely stable in chemical property, can run for a long time after being used, and meets the requirement of 25 years of service life of the wind driven generator. The utility model provides a wind-powered electricity generation blade ice-melt ice device that prevents icing through using the PTC heater, combines temperature measurement station and controller, and unique arrangement and control, mutual collaborative work can fine protection fan blade, guarantees that wind turbine generator system safety in winter, reliable, stable, long-term operation.
It should be noted that the above-mentioned embodiments enable a person skilled in the art to more fully understand the invention, without restricting it in any way. Therefore, although the present invention has been described in detail with reference to the drawings and examples, it will be understood by those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention.
Claims (10)
1. The anti-icing and de-icing device for the wind power blade is characterized by comprising a PTC heater, a temperature measuring point and a controller, wherein the PTC heater is arranged on the surface of the front edge of the wind power blade, the temperature measuring point is arranged on the wind power blade, and the controller is respectively connected with the temperature measuring point and the PTC heater.
2. The wind power blade anti-icing and de-icing device as claimed in claim 1, wherein the PTC heater comprises a PTC heating element, a cable and an insulating film wrapped on the outer surface of the PTC heating element, the PTC heating element and the cable are connected in parallel to form a closed loop, a switch element is arranged on the closed loop, and the switch element is connected with the controller.
3. The wind power blade anti-icing and de-icing device according to claim 2, wherein the PTC heater is a PTC ceramic heater with ceramic PTC heating elements.
4. The wind power blade anti-icing and de-icing device according to claim 2, wherein the PTC heater is a PTC semiconductor heater in which a PTC heating element is a semiconductor.
5. The wind power blade anti-icing and de-icing device as claimed in claim 2, wherein the PTC heater is a PTC conductive plastic heater in which a PTC heating element is conductive plastic.
6. The wind power blade anti-icing and de-icing device according to one of claims 1 to 5, wherein the temperature measuring points are a plurality of optical fiber temperature measuring points uniformly distributed on the wind power blade.
7. The wind power blade anti-icing and de-icing device as claimed in one of claims 1 to 5, wherein a plurality of PTC heaters are adopted, and the PTC heaters are arranged on the surface of the front edge of the wind power blade in parallel along the length direction of the wind power blade.
8. The wind power blade anti-icing and de-icing device according to claim 7, wherein the PTC heaters and the temperature measuring points are uniformly distributed on each wind power blade of the wind driven generator.
9. The wind power blade anti-icing and de-icing device according to claim 8, wherein the PTC heater and the temperature measuring point are integrally laid on the wind power blade to a thickness of not more than 4 mm.
10. The wind power blade anti-icing and de-icing device according to claim 2, wherein the insulating film is an F46 polyimide film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020970946.1U CN212583885U (en) | 2020-06-01 | 2020-06-01 | Anti-icing and de-icing device for wind power blade |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020970946.1U CN212583885U (en) | 2020-06-01 | 2020-06-01 | Anti-icing and de-icing device for wind power blade |
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| CN212583885U true CN212583885U (en) | 2021-02-23 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113266540A (en) * | 2021-06-21 | 2021-08-17 | 中能电力科技开发有限公司 | Anti-icing and deicing method for composite coating of fan blade |
| CN116498507A (en) * | 2023-06-19 | 2023-07-28 | 湖南创一工业新材料股份有限公司 | Electric heating control method and electric heating system for wind power blade |
-
2020
- 2020-06-01 CN CN202020970946.1U patent/CN212583885U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113266540A (en) * | 2021-06-21 | 2021-08-17 | 中能电力科技开发有限公司 | Anti-icing and deicing method for composite coating of fan blade |
| CN116498507A (en) * | 2023-06-19 | 2023-07-28 | 湖南创一工业新材料股份有限公司 | Electric heating control method and electric heating system for wind power blade |
| CN116498507B (en) * | 2023-06-19 | 2023-09-22 | 湖南创一工业新材料股份有限公司 | Electric heating control method and electric heating system for wind power blade |
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