Flexible carbon fiber heating device

Abstract

The invention provides a flexible carbon fiber heating device. The flexible carbon fiber heating device comprises a flexible pad body and a control module, the flexible pad body comprises a superfine fiber cloth layer, a carbon fiber cloth layer and a supporting layer located between the superfine fiber cloth layer and the carbon fiber cloth layer. The control module is electrically connected between the carbon fiber cloth layer and the power supply and is used for controlling the temperature of the carbon fiber cloth layer. Therefore, the flexible pad body can be flatly attached to the blade according to the surface shape of the blade, so that the blade is uniformly heated and cured, and the flexible pad body has the advantages of shortening the heating time and avoiding the use of high-cost mold equipment.

Description

Technical Field

[0001] The present application relates to a heating device, and more particularly to a flexible carbon fiber heating device. Background Art

[0002] At present, wind power generation is a clean and environmentally friendly form of energy generation that does not produce greenhouse gas emissions such as carbon dioxide. Therefore, the use of wind turbines can help reduce dependence on and demand for fossil fuels or traditional energy, reduce carbon emissions in the energy generation process, and play a positive role in addressing climate change.

[0003] As wind turbines continue to grow in size to capture more wind energy and provide higher power generation capacity, wind turbines typically have blades that are hundreds of feet long. When the wind blows over the blades of the wind turbine, the blades are acted upon by the wind and begin to rotate, driving the generator to generate electricity. Therefore, the blades of wind turbines are extremely important for power generation efficiency.

[0004] However, the blades of wind turbines have the following disadvantages in thermosetting forming: (1) High energy consumption: The blade thermosetting process requires high-temperature baking to solidify it and achieve the required strength and structure. Such high-temperature baking requires a lot of energy, resulting in increased energy consumption.

[0005] (2) Long production cycle: Blade forming is carried out by rigid heating elements or baking equipment, which heats and solidifies the blades by heat conduction. The heating speed and efficiency are affected by the structure of the material, resulting in a long operation time.

[0006] (3) High equipment cost: Thermosetting forming requires expensive equipment, technology and a large factory. In addition, in order to cope with the curved shape of the blade, the design threshold of the heating element or equipment is also high, resulting in high overall costs. Summary of the invention

[0007] To solve the aforementioned problems, the present invention provides a flexible carbon fiber heating device, which has a flexible pad body that is flatly attached to the blade, and evenly heats the blade to solidify it after the carbon fiber cloth layer is energized, which has the advantages of shortening the heating time and eliminating the use of high-cost mold equipment.

[0008] To achieve the above purpose, an embodiment of the present invention provides a flexible carbon fiber heating device, which includes a flexible pad and a control module. The flexible pad includes an ultrafine fiber cloth layer, a carbon fiber cloth layer, and a support layer located between the ultrafine fiber cloth layer and the carbon fiber cloth layer; the control module is electrically connected between the carbon fiber cloth layer and the power supply to control the temperature of the carbon fiber cloth layer.

[0009] In another embodiment of the present invention, a first temperature sensor is embedded in the carbon fiber cloth layer to collect a temperature signal of the carbon fiber cloth layer. The control module has a microprocessor and an A / D converter and a signal receiver electrically connected to the microprocessor. The signal receiver can receive the temperature signal and convert it into a digital signal to the microprocessor through the A / D converter.

[0010] In another embodiment of the present invention, a second temperature sensor is embedded in the carbon fiber cloth layer and electrically connected to the microprocessor. The second temperature sensor is a thermistor.

[0011] In another embodiment of the present invention, the second temperature sensor is a negative temperature coefficient thermistor.

[0012] In another embodiment of the present invention, a power line is further included which is electrically connected between the control module and the carbon fiber cloth layer, and the power line is serially connected to the second temperature sensor and the carbon fiber cloth layer.

[0013] In another embodiment of the present invention, the carbon fiber cloth layer is woven from discontinuous short-fiber carbon fibers.

[0014] In another embodiment of the present invention, the material of the support layer is thermoplastic polyurethane.

[0015] In another embodiment of the present invention, the flexible pad package is covered with a Teflon layer.

[0016] In another embodiment of the present invention, the voltage of the flexible carbon fiber heating device is 110V to 250V, and the current is 20A to 50A.

[0017] In another embodiment of the present invention, the microfiber fabric layer is made of water- and oil-repellent material.

[0018] The beneficial effects of the present invention are as follows: the flexible pad of the present invention can conform to the surface shape of the blade, lie flat on the blade and heat the blade evenly, making the blade thermal curing operation simpler and easier to perform, and no complicated and costly baking equipment is required. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic structural diagram of the flexible carbon fiber heating device of the present invention; Figure 2 This is a SEM image of the carbon fiber cloth of the flexible carbon fiber heating device of the present invention; Figure 3 This is a schematic diagram of the flexible carbon fiber heating device of the present invention being used on a blade; Figure 4 It is a schematic diagram of the flexible carbon fiber heating device of the present invention being flatly attached to a blade.

[0020] Description of Reference Numerals 100. Flexible carbon fiber heating device; 10. Flexible pad; 11. Microfiber cloth layer; 12. Carbon fiber cloth layer; 13. Support layer; 14. Teflon layer; 20. Control module; 21. Microprocessor; 22. A / D converter; 23. Signal receiver; 40. First temperature sensor; 50. Second temperature sensor; 60. Power cord; 200. Blades; 300. Power supply. DETAILED DESCRIPTION

[0021] Exemplary embodiments of the present invention are described in detail below with reference to the accompanying drawings, and it is not intended to limit the technical principles of the present invention to the specific disclosed embodiments. Instead, the scope of the present invention is limited only by the scope of the claims and covers substitutions, modifications and equivalents.

[0022] See also Figures 1 to 4 FIG. 1 is a flexible carbon fiber heating device 100 of the present invention, which is used to perform thermal curing on a blade 200 of a wind turbine generator to cure the blade 200. The flexible carbon fiber heating device 100 includes a flexible pad 10 and a control module 20.

[0023] The flexible pad 10 includes an ultrafine fiber cloth layer 11, a carbon fiber cloth layer 12 and a support layer 13. The ultrafine fiber cloth layer 11 is a nano ultrafine fiber and is water-repellent and oil-repellent. The carbon fiber cloth layer 12 is woven from discontinuous short-fiber carbon fibers, which gives the carbon fiber cloth layer 12 a higher resistance, such as Figure 2 The electron microscope (SEM) observation diagram is shown. When the carbon fiber of the carbon fiber cloth layer 12 is partially broken and worn, it will not affect the non-continuous fibers in other parts, so as to increase the use efficiency and life of the carbon fiber cloth layer 12. In addition, the short-fiber carbon fiber is not easy to be entangled during the manufacturing process, which is conducive to the uniform dispersion and stability of the carbon fiber. In addition, the carbon fiber cloth layer 12 is heated and carbonized, and after it is energized and a large current is input, it has a high resistance to generate an electrothermal effect, and has excellent far-infrared radiation efficiency, so that the carbon fiber cloth layer 12 heats the object by thermal radiation, providing a uniform heating effect.

[0024] In the embodiment of the present invention, the unit area of ​​the short fiber carbon fiber is 160g / m 2 , the carbonization degree is 85%. However, in order to support the carbon fiber cloth layer 12, a unit area of ​​81g / m 2 The glass fiber fabric, PC resin and EP resin are used as the bonding substrate of the carbon fiber cloth layer 12 to increase the thickness and strength of the carbon fiber cloth layer 12. The glass fiber fabric, PC resin and EP resin are bonded to the fibers of the carbon fiber cloth layer 12 by impregnation, infiltration, coating and the like, thereby increasing the wear resistance of the carbon fiber cloth layer 12 and reducing the delamination problem.

[0025] The support layer 13 is made of thermoplastic polyurethane (TPU). The support layer 13 is located between the ultrafine fiber cloth layer 11 and the carbon fiber cloth layer 12 to bridge and support the non-affinity carbon fiber cloth layer 12 and the ultrafine fiber cloth layer 11 .

[0026] like Figure 3 , Figure 4 And cooperate Figure 1 As shown, the flexible pad body 10 is made of a microfiber cloth layer 11, a carbon fiber cloth layer 12 and a support layer 13, which provide flexibility and adaptability, so that the flexible pad body 10 can adapt to the surface shape of the blade 200 of the wind turbine and lie flat thereon, so as to provide a uniform heating effect for the blade 200.

[0027] In another embodiment of the present invention, the flexible pad 10 is encapsulated and coated with a Teflon layer 14 to provide the flexible pad 10 with the effects of being difficult to adhere to and accumulate foreign matter and being easy to clean.

[0028] The control module 20 is electrically connected between the carbon fiber cloth layer 12 of the flexible pad 10 and the power source 300 to control the temperature of the carbon fiber cloth layer 12. In the embodiment of the present invention, the control module 20 includes a microprocessor 21, an A / D converter 22 and a signal receiver 23. The A / D converter 22 is electrically connected to the signal receiver 23 and the microprocessor 21 respectively.

[0029] The carbon fiber cloth layer 12 is embedded with a first temperature sensor 40 and a second temperature sensor 50. The first temperature sensor 40 is used to collect a temperature signal of the carbon fiber cloth layer 12, that is, to collect the temperature value of the carbon fiber cloth layer 12. The signal receiver 23 can receive the temperature signal and convert it into a digital signal through the A / D converter 22 to the microprocessor 21, so that the control module 20 can monitor the heating temperature and heating time of the carbon fiber cloth layer 12 in real time, so that when the heating temperature of the carbon fiber cloth layer 12 reaches a predetermined temperature value, the power supply to the carbon fiber cloth layer 12 is stopped, and the heating of the carbon fiber cloth layer 12 is stopped.

[0030] The second temperature sensor 50 is electrically connected to the microprocessor 21 . The second temperature sensor 50 is a thermistor. In the embodiment of the present invention, the second temperature sensor 50 is a negative temperature coefficient thermistor (NTC).

[0031] The present invention further includes a power line 60, which is electrically connected between the control module 20 and the carbon fiber cloth layer 12, and the power line 60 is connected in series with the second temperature sensor 50 and the carbon fiber cloth layer 12. When the heating temperature of the carbon fiber cloth layer 12 exceeds the preset temperature value, the resistance value of the second temperature sensor 50 decreases as the temperature rises, and the second temperature sensor 50 forms a short circuit to block the current from passing, thereby stopping the heating of the carbon fiber cloth layer 12.

[0032] It should be noted that the second temperature sensor 50 is the second layer of protection mechanism for monitoring the heating of the carbon fiber cloth layer 12 of the present invention. That is, when the temperature of the carbon fiber cloth layer 12 is too high, if the control module 20 does not immediately stop heating the carbon fiber cloth layer 12, the carbon fiber cloth layer 12 will continue to heat up to the preset action temperature of the second temperature sensor 50. By disconnecting the second temperature sensor 50, the heating action of the carbon fiber cloth layer 12 can be stopped, thereby improving the safety protection of the thermal curing process of the blade 200.

[0033] In addition, the voltage of the flexible carbon fiber heating device 100 of the present invention is 110V to 250V, and the current is 20A to 50A.

[0034] In another embodiment of the present invention, the control module 20 can be connected to an external terminal device by wire or wirelessly to integrate the aforementioned signal information and display it on the external terminal device, so that the staff can know the current operation status at any time.

[0035] In summary, the present invention has the following advantages and effects: 1. The flexible pad 10 of the present invention can conform to the surface shape of the blade 200, lie flat on it and evenly heat the blade 200, making the heating and curing forming operation of the blade 200 simpler and easier to perform without the need for complex and costly baking equipment.

[0036] 2. The present invention utilizes the carbon fiber cloth layer 12 to heat the blade 200 by heat radiation after being energized. The heating is not affected by the contacting material, provides better heating efficiency, and effectively shortens the heating operation time, thereby reducing energy consumption and effectively reducing costs.

[0037] 3. The present invention does not require complicated equipment, molds and factories, thereby reducing dependence on high-cost equipment.

[0038] 4. The flexible carbon fiber heating device 100 of the present invention is a non-rigid heating device and can be curled when stored or transported, which is conducive to cross-regional and cross-national transportation and improves the convenience of use by the industry.

[0039] Although the present invention is described above with a preferred embodiment, those skilled in the art can make various changes without departing from the spirit and scope of the present invention. The above embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. All modifications or changes that do not violate the spirit of the present invention are within the scope of the patent application of the present invention.

Claims

1. A flexible carbon fiber heating device, It is characterized in that include: a flexible pad, comprising an ultrafine fiber cloth layer, a carbon fiber cloth layer, and a support layer between the ultrafine fiber cloth layer and the carbon fiber cloth layer, wherein the carbon fiber cloth layer is woven from discontinuous short-fiber carbon fibers; and A control module is electrically connected between the carbon fiber cloth layer and the power source to control the temperature of the carbon fiber cloth layer.

2. The flexible carbon fiber heating device according to claim 1, It is characterized in that The carbon fiber cloth layer is embedded with a first temperature sensor for collecting a temperature signal of the carbon fiber cloth layer. The control module has a microprocessor, an A / D converter electrically connected to the microprocessor, and a signal receiver. The signal receiver can receive the temperature signal and convert it into a digital signal to the microprocessor through the A / D converter.

3. The flexible carbon fiber heating device according to claim 2, It is characterized in that The carbon fiber cloth layer is embedded with a second temperature sensor which is electrically connected to the microprocessor. The second temperature sensor is a thermistor.

4. The flexible carbon fiber heating device according to claim 3, It is characterized in that The second temperature sensor is a negative temperature coefficient thermistor.

5. The flexible carbon fiber heating device according to claim 3, It is characterized in that The invention also comprises a power line electrically connected between the control module and the carbon fiber cloth layer, and the power line is serially connected to the second temperature sensor and the carbon fiber cloth layer.

6. The flexible carbon fiber heating device according to claim 1, It is characterized in that The material of the supporting layer is thermoplastic polyurethane.

7. The flexible carbon fiber heating device according to claim 6, It is characterized in that The flexible pad package is covered with a Teflon layer.

8. The flexible carbon fiber heating device according to claim 7, It is characterized in that The voltage of the flexible carbon fiber heating device is 110V to 250V, and the current is 20A to 50A.

9. The flexible carbon fiber heating device according to claim 8, It is characterized in that The microfiber layer is water and oil repellent.

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