CN113931812A - Wind driven generator blade deicing device capable of realizing automatic temperature control - Google Patents
Wind driven generator blade deicing device capable of realizing automatic temperature control Download PDFInfo
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- CN113931812A CN113931812A CN202111261601.4A CN202111261601A CN113931812A CN 113931812 A CN113931812 A CN 113931812A CN 202111261601 A CN202111261601 A CN 202111261601A CN 113931812 A CN113931812 A CN 113931812A
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- radiation heating
- driven generator
- body radiation
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- 238000010438 heat treatment Methods 0.000 claims abstract description 124
- 230000005855 radiation Effects 0.000 claims abstract description 97
- 239000010410 layer Substances 0.000 claims abstract description 39
- 238000012544 monitoring process Methods 0.000 claims abstract description 39
- 239000011241 protective layer Substances 0.000 claims abstract description 11
- 239000000463 material Substances 0.000 claims abstract description 10
- 238000004891 communication Methods 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 abstract description 10
- 238000013021 overheating Methods 0.000 abstract description 10
- 230000032683 aging Effects 0.000 abstract description 8
- 238000009434 installation Methods 0.000 abstract description 6
- 230000008569 process Effects 0.000 abstract description 2
- 238000012986 modification Methods 0.000 description 5
- 230000004048 modification Effects 0.000 description 5
- 239000000758 substrate Substances 0.000 description 5
- 238000005485 electric heating Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000004422 calculation algorithm Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000000862 absorption spectrum Methods 0.000 description 1
- 125000003342 alkenyl group Chemical group 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D80/00—Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
- F03D80/40—Ice detection; De-icing means
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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 invention discloses a wind driven generator blade deicing device capable of realizing automatic temperature control. In the device, a power supply module is respectively connected with an external power supply and a control module; the heating module is connected with the control module; the heating module is provided with M warm body radiation heating films, the warm body radiation heating films are arranged on the inner surface of the blade shell of the wind driven generator, and each warm body radiation heating film is correspondingly provided with one monitoring unit; the monitoring unit is in communication connection with the control module; the temperature body radiation heating film comprises a base material, a radiation layer, a protective layer and a reflecting layer; the radiation layer comprises a current-carrying strip and a radiation heating element, the current-carrying strip is arranged on each of two sides of the radiation heating element, and a power supply interface is arranged on each current-carrying strip. The invention can be used for automatically controlling the temperature of any local position in the heating deicing process of the wind driven generator blade, avoids the damage and the aging of the blade caused by local overheating, improves the deicing energy efficiency, reduces the complexity of the device and reduces the installation cost.
Description
Technical Field
The invention relates to a blade deicing device in the technical field of wind power generation, in particular to a blade deicing device of a wind driven generator, which realizes automatic temperature control.
Background
At present, the anti-icing and deicing technology for mature and large-scale application of the blades of the wind driven generators worldwide mainly prevents the blades of the wind driven generators from icing or removes accumulated ice attached to the blades by heating the blades of the wind driven generators. The heating method for the blades of the wind driven generator mainly comprises an electric heating method and an air heating method. The electric heating method is that layered electric heating materials are laid on the outer surface of a shell of the blade of the wind driven generator or in a shell layer below a skin of the blade, heat energy is generated through the electric heating materials and is conducted to ice or water attached to the surface and the surface of the blade, and therefore the purposes of deicing and ice prevention are achieved. The air heating method is that a gas heating device is installed at the root of the blade of the wind driven generator, and heat energy is transferred to the outer surface of the blade and ice or water attached to the surface of the blade by heating air in a cavity of the blade, so that the purposes of deicing and anti-icing are achieved.
However, the applicant has found that the prior art has at least the following technical problems:
in the prior art, the motor blade can only be preliminarily prevented from icing and deiced, the temperature of the blade is difficult to keep uniform distribution in the heating process, local overheating is likely to be generated, and then the blade is damaged and aged more quickly, and the technical problems of low energy efficiency, high cost, difficulty in realization and difficulty in monitoring exist at the same time.
Disclosure of Invention
The embodiment of the invention provides a deicing device for blades of a wind driven generator, which is used for solving the technical problems that the blades are easy to generate local overheating to cause blade damage and accelerated aging, and the deicing device is low in energy efficiency, high in cost, difficult to implement, difficult to monitor and low in practicability.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
the device comprises a power supply module, a heating module, a monitoring module and a control module, wherein the power supply module is respectively connected with an external power supply and the control module; the heating module is connected with the control module through a lead; the heating module is provided with M warm body radiation heating films, wherein the warm body radiation heating films are fixedly arranged on the inner surface of the blade shell of the wind driven generator, the monitoring module is provided with M monitoring units, and each warm body radiation heating film is correspondingly provided with one monitoring unit; and the monitoring unit is in communication connection with the control module.
The M blocks of the warm body radiation heating films are arranged at intervals along the length direction of the wind driven generator blade, and each block of the warm body radiation heating film is connected to the control module through a respective monitoring unit.
The warm body radiation heating film is arranged on the inner wall surface of the wind driven generator blade, which is easy to have an ice layer.
The power of the electric wire flowing through the thermometer radiation heating film is monitored through the monitoring module, and the temperature of the thermometer radiation heating film is determined through the relation between the power and the temperature.
The warm body radiation heating film includes:
the surface of one side of the base material is fixedly arranged on the inner surface of the shell of the wind driven generator blade;
a radiation layer, an inner surface of the radiation layer being disposed on the other surface of the substrate;
a protective layer, an inner surface of the protective layer being disposed on an outer surface of the radiation layer;
a reflective layer disposed on an outer side surface of the protective layer.
The current carrying strip is made of metal materials.
The radiation layer comprises a current-carrying strip and a radiation heating element, the current-carrying strip is arranged on each of two sides of the radiation heating element, a power supply interface is arranged on each current-carrying strip, and the power supply interface is connected with the power supply through a lead.
The thickness range of the warm body radiation heating film is 0.18-0.25 mm, and the power density of the warm body radiation heating film is 100W/m2～2500W/m2. The voltage range of the power supply is 220V-690V.
The radiation layer under the structure can convert electric energy into infrared rays with the wavelength of 5.5-15.5 microns through the radiation heating element, and the energy conversion rate is over 90 percent.
The radiant heating element is an alkenyl heating element having PTC characteristics, the heating power of which decreases as the temperature rises and reaches a minimum value at a preset temperature. The resistance changes along with the temperature change, the heating power gradually reaches the maximum when the temperature gradually drops to the icing temperature, the heating power gradually reduces to the minimum when the temperature gradually rises to the highest temperature which can be borne by the blade, and the heating element can be designed and adjusted to maintain any position of the heating element in a fixed temperature range during working, so that the local automatic temperature control is realized, and the problem of local overheating of the blade is effectively solved.
One or more technical solutions in the embodiments of the present invention at least have one or more of the following technical effects:
the embodiment of the invention provides a deicing device for blades of a wind driven generator, wherein when the deicing device works, a heating module is started through a control module, a radiation heating element in a temperature body radiation heating film in the heating module consists of mutually independent molecular-level microstructures, and the microstructures are basic functional units for converting electric energy into infrared radiation. The microstructure is designed according to the characteristics of the working environment of the blade of the wind driven generator, the heating power of the microstructure is in a specific relation with the temperature of the environment of the region where the microstructure is located, so that the output power is automatically adjusted according to the temperature of the region where the microstructure is located, the temperature of any position of the blade is stabilized near a preset target temperature, local overheating is avoided, the aging of the blade is reduced, meanwhile, the device can analyze and calculate the temperature of the region where the microstructure is located according to the working condition of the thermometer radiation heating film, and the complexity and the cost of monitoring the temperature of the blade are reduced.
In addition, because the heating module is installed in the blade cavity, the installation cost is low, the direct contact with the external severe environment can be avoided, the reliability is improved, the installation cost is reduced, and the technical problems that the blade is easy to generate local overheating to damage and accelerate aging, the energy efficiency is low, the cost is high, the realization is difficult, the monitoring is difficult or the practicability is low in the prior art are solved.
Drawings
FIG. 1 is a schematic diagram of the overall framework of the apparatus of the present invention;
FIG. 2 is a schematic diagram of the connection of a control module to a bulb radiant heating film in a heating film block according to an embodiment of the present invention;
FIG. 3 is a sectional view A-A of a wind turbine blade according to an embodiment of the present invention;
fig. 4 is a schematic structural view of a thermometer radiation heating film according to an embodiment of the present invention.
Description of reference numerals: the device comprises a power module 1, a heating module 2, a thermometer radiation heating film 21, a substrate 211, a radiation layer 212, a current carrying strip 2121, a radiation heating element 2122, a power interface 2123, a protective layer 213, a reflection layer 214, a monitoring module 3, a monitoring unit 31, a control module 4, an external power supply 5, a wind driven generator blade 6, a lead 7 and an ice layer 8.
Detailed Description
The foregoing description is only an overview of the technical solutions of the present invention, and the embodiments of the present invention are described below in order to make the technical means of the present invention more clearly understood and to make the above and other objects, features, and advantages of the present invention more clearly understandable.
The embodiment of the invention provides a wind driven generator blade deicing device, which solves the technical problems that blades in the prior art are easy to generate local overheating to damage and accelerate aging, and the blades are low in energy efficiency, high in energy consumption and cost, difficult to realize or low in practicability.
The technical device in the embodiment of the invention has the following general structure:
as shown in fig. 1, the device comprises a power module 1, a heating module 2, a monitoring module 3 and a control module 4, wherein the power module 1 is respectively connected with an external power supply 5 and the control module 4 for supplying power; the heating module 2 is connected with the control module 4 through a lead;
the heating module 2 is provided with M blocks of thermometer radiation heating films 21, M is a positive integer, wherein the thermometer radiation heating films 21 are fixedly arranged on the inner surface of the shell of the wind driven generator blade 6, the monitoring module 3 is provided with M monitoring units 31, and each thermometer radiation heating film 21 is correspondingly provided with one monitoring unit 31; the monitoring unit 3 is in communication connection with the control module 4, and the control module 4 receives the monitoring signal sent by the monitoring module 3.
A heating area temperature algorithm is preset in the control module 4, and the temperature of the area where the thermometer radiation heating film 21 is located is calculated through signals sent by the monitoring module 3.
The heating power of any position is automatically and independently adjusted according to the temperature of the blade in the heating process through the heating region temperature calculation algorithm, so that the blade maintains the preset target temperature at any position, local overheating is avoided, aging of the blade is reduced, the technical effects of reducing the complexity of the device, reducing the installation cost, automatically controlling the temperature, and having high reliability and high energy efficiency are achieved.
As shown in fig. 2, M blocks of the warm body radiant heating films 21 are arranged at intervals along the length direction of the wind turbine blade 6, and each block of the warm body radiant heating films 21 is connected to the control module 4 through a respective one of the monitoring units 31.
In specific implementation, one end of each block of the thermo-body radiation heating film 21 is connected to one end of the control module 4 through the lead 7, and the other end of each block of the thermo-body radiation heating film 21 is connected to the other end of the control module 4 through the lead 7 after passing through one monitoring unit 31.
As shown in fig. 3, the warm body radiation heating film 21 is disposed on the inner wall surface of the wind turbine blade 6 on the side where the ice layer 8 is likely to be formed.
The power flowing through the electric wire of the thermo body radiation heating film 21 is monitored by the monitoring module 3, and the temperature of the thermo body radiation heating film 21 is determined by the relation between the power and the temperature.
And then the monitoring module 3 monitors the temperature of the thermal body radiation heating film 21 in real time, if the preset temperature threshold is reached, the temperature is fed back to the control module 4 to control the thermal body radiation heating film 21 to stop heating, so that the temperature is reduced, and the deicing operation with automatic temperature control is realized.
As shown in fig. 4, the warm body radiation heating film 21 includes:
a base material 213, one side surface of which is fixedly arranged on the inner surface of the shell of the wind driven generator blade 6;
a radiation layer 212, an inner side surface of the radiation layer 212 being disposed on the other side surface of the substrate 213;
a protective layer 211, an inner side surface of the protective layer 211 being disposed on an outer side surface of the radiation layer 212;
a reflective layer 214, the reflective layer 214 being disposed on an outer side surface of the protective layer 211.
The radiation layer 212 includes a current-carrying strip 2121 and a radiation heating element 2122, the current-carrying strip 2121 is disposed on both sides of the radiation heating element 2122, a power supply interface 2123 is disposed on the current-carrying strip 2121, and the power supply interface 2123 is connected to a power supply via a wire.
A voltage is applied to the radiation heating element 2122 via the current carrying strip 2121 by an input from the power supply interface 2123, and infrared heat is radiated from the radiation heating element 2122 to heat the element.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
Referring to fig. 1-4, in the deicing device of this embodiment, the control module is connected to an external power supply through the power module, when deicing is performed, the control module 4 turns on the heating module 2, and the thermal body radiation heating film 21 in the heating module 2 can automatically adjust the output power of the radiation heating element 213 according to the temperature of the inner surface of the blade 5, so as to stabilize the temperature near a preset target temperature, without the need of regulation and control of the control module 4, thereby avoiding damage and aging caused by local overheating of the blade 5.
Firstly, the power module 1 provides electric energy for the device, and the voltage range of the power module 1 is 220V-690V to provide a proper working voltage 690V for the control module 4, which is adapted to the voltage of the wind driven generator. The heating modules 2 are connected with the control module 4 through conducting wires, wherein the number of the heating modules 2 is the same as that of the blades 5 of the wind turbine generator. The heating module 2 is provided with a plurality of warm body radiation heating films 21, and the warm body radiation heating films 21 are fixedly connected with the inner surfaces of the blades 5 through bonding glue. Because the heating module 2 is installed in the blade cavity, the installation cost is low, the direct contact with the external severe environment can be avoided, and the system reliability is high.
The thickness of the self-temperature-control radiation heating film 21 is 0.18-0.25 mm. According to different working conditions, the power density of the self-temperature-control radiation heating film 21 is 100W/m2～2500W/m2. The self temperature-controlling radiation heating film 21 includes: substrate 211, radiation layer 212, power interface 2123, and reflective layer 214. The radiation layer 212 is disposed on the surface of the substrate 211, and the radiation layer 212 includes a current-carrying strip 2121, a radiation heating element 2122, and the radiation heating element 2122, so that the output power of the heating material at any position can be independently and automatically adjusted according to the ambient temperature, so that the ambient temperature is stabilized near the preset target temperature, and the normal operation of the heating material at other positions is not affected by any damage of the heating material. The power interface 2123 is mounted on the current-carrying strip 2121, the power interface 2123 is connected with the control module 4, when the ice-removing operation is performed, the control module 4 supplies power to the radiation layer 212 through the power interface 2123, the radiation layer 212 converts electric energy into infrared rays with the wavelength of 5.5-15.5 μm, and as the absorption spectrum of water molecules reaches a peak value at a position of 10 μm, the radiation absorption of the thermal body radiation heating film 21 is good, and part of infrared radiation can penetrate through the blades 5 to directly heat the water molecules, compared with an electrothermal method and a gas-thermal method, the system thermal inertia is smaller, and the heating energy efficiency is higher. During the deicing operation, the thermometer radiation heating film 21 can automatically adjust the output power of different positions of the radiation layer 212 according to the temperature of the inner surface of the blade 5, so as to stabilize the temperature near the preset target temperature without being regulated by the control module 4.
The monitoring module 3 comprises a plurality of monitoring units 31, the number of the monitoring units 31 is the same as that of the thermometer radiation heating films 21, a single monitoring unit 31 monitors the working condition of a circuit where a single thermometer radiation heating film 21 is located and sends a monitoring signal to the control module, the control module monitors and controls the thermometer radiation heating film to work, the control module calculates and analyzes the temperature of the area where each thermometer radiation heating film is located through a preset heating area temperature algorithm, and the area temperature can be used for subsequent operations such as temperature monitoring and data analysis.
Example 2
The inner surfaces of the blades 5 can be laid with a plurality of layers of warm body radiation heating films 21 without the reflecting layer 214 at the same position, and then the plurality of layers of warm body radiation heating films are connected in parallel, then the reflecting layers 214 are uniformly installed and connected with the control module 4, so that the radiation heating effect of the warm body radiation heating films 21 is enhanced.
Therefore, the method can be used for realizing automatic temperature control of any local position in the heating deicing process of the wind driven generator blade, avoids blade damage and aging caused by local overheating, improves deicing energy efficiency, reduces device complexity and reduces installation cost.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various modifications and variations can be made in the embodiments of the present invention without departing from the spirit or scope of the embodiments of the invention. Thus, if such modifications and variations of the embodiments of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to encompass such modifications and variations.
Claims (6)
1. A wind driven generator blade deicing device capable of realizing self-temperature control is characterized by comprising a power supply module (1), a heating module (2), a monitoring module (3) and a control module (4), wherein the power supply module (1) is respectively connected with an external power supply (5) and the control module (4); the heating module (2) is connected with the control module (4) through a lead;
the heating module (2) is provided with M warm body radiation heating films (21), wherein the warm body radiation heating films (21) are fixedly arranged on the inner surface of a shell of the wind driven generator blade (6), the monitoring module (3) is provided with M monitoring units (31), and each warm body radiation heating film (21) is correspondingly provided with one monitoring unit (31); the monitoring unit (3) is in communication connection with the control module (4).
2. The deicing device for the blades of the wind driven generator realizing the self-temperature control as claimed in claim 1, wherein:
the M blocks of warm body radiation heating films (21) are arranged at intervals along the length direction of the wind driven generator blade (6), and each block of warm body radiation heating film (21) is connected to the control module (4) through a respective monitoring unit (31).
3. The deicing device for blades of wind driven generators capable of realizing self-temperature control as claimed in claim 1 or 2, wherein:
the warm body radiation heating film (21) is arranged on the inner wall surface of the wind driven generator blade (6) on the side easily provided with the ice layer (8).
4. The deicing device for the blades of the wind driven generator realizing the self-temperature control as claimed in claim 1, wherein:
the power of the electric wire flowing through the warm body radiation heating film (21) is monitored through the monitoring module (3), and the temperature of the warm body radiation heating film (21) is determined through the relation between the power and the temperature.
5. The deicing device for the blades of the wind driven generator realizing the self-temperature control as claimed in claim 1, wherein:
the warm-body radiation heating film (21) includes:
a base material (213) having one side surface fixedly arranged on the inner surface of the shell of the wind driven generator blade (6);
a radiation layer (212), an inner side surface of the radiation layer (212) being disposed on the other side surface of the base material (213);
a protective layer (211), an inner side surface of the protective layer (211) being disposed on an outer side surface of the radiation layer (212);
a reflective layer (214), the reflective layer (214) disposed on an outer side surface of the protective layer (211).
6. The deicing device for blades of wind driven generators capable of realizing self-temperature control as claimed in claim 5, wherein: the radiation layer (212) comprises a current-carrying strip (2121) and a radiation heating element (2122), the current-carrying strip (2121) is arranged on each of two sides of the radiation heating element (2122), a power supply interface (2123) is arranged on each current-carrying strip (2121), and the power supply interface (2123) is connected with the power supply through a lead.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111261601.4A CN113931812A (en) | 2021-10-28 | 2021-10-28 | Wind driven generator blade deicing device capable of realizing automatic temperature control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111261601.4A CN113931812A (en) | 2021-10-28 | 2021-10-28 | Wind driven generator blade deicing device capable of realizing automatic temperature control |
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| CN113931812A true CN113931812A (en) | 2022-01-14 |
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| CN202111261601.4A Pending CN113931812A (en) | 2021-10-28 | 2021-10-28 | Wind driven generator blade deicing device capable of realizing automatic temperature control |
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| CN216894755U (en) * | 2021-10-28 | 2022-07-05 | 浙江大学包头工业技术研究院 | Wind driven generator blade deicing device capable of realizing automatic temperature control |
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2021
- 2021-10-28 CN CN202111261601.4A patent/CN113931812A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US20030015524A1 (en) * | 2000-04-03 | 2003-01-23 | Lambert Feher | Compact microwave system for de-icing and for preventing icing of the outer surfaces of hollow or shell structures which are exposed to meterological influences |
| DE10118121A1 (en) * | 2001-04-11 | 2002-10-24 | Karlsruhe Forschzent | Microwave device for preventing ice formation on and deicing surfaces of dimensionally stable hollow body structures for use in aeronautics to keep wing leading edges free of ice |
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