Deicing device for blades of wind driven generator

Abstract

The invention provides a wind driven generator blade deicing device, and relates to the technical field of deicing of wind driven generator blades, the wind driven generator blade deicing device comprises a deicing mechanism, the deicing mechanism is arranged on a blade body, the blade body is installed on a wind driven generator set, and a control module is arranged on the wind driven generator set. And the control module is connected with the deicing mechanism. The deicing mechanism is arranged on the wind driven generator blade, an ice layer on the surface of the blade body can be effectively removed, meanwhile, the control module is matched to conduct automatic deicing control on the fan blade under different environment conditions, safety protection is conducted on the fan blade, and the service life of the fan blade is prolonged. Meanwhile, the deicing device is light in overall design, easy to disassemble and assemble and high in adaptability.

Description

Technical Field

[0001] The invention relates to the technical field of deicing of wind turbine blades, and in particular to a wind turbine blade deicing device. Background Art

[0002] The wind turbine blade thawing device is mainly used in the following scenarios, and the main purpose is to thaw the blades in extremely cold weather, generate electricity through wind power, and create revenue. First, it is used in high-altitude mountainous areas. In high-altitude mountainous areas, as the altitude increases, the temperature gradually decreases. Especially in winter, the wind turbine blades are prone to ice. Ice will not only affect the normal operation of the generator, but may even cause shutdown, which in turn affects the stability and safety of power supply. Therefore, the wind turbine blade thawing device in these areas is particularly important; second, in cold climate areas, in areas with cold climates, long winters and frequent snowfall, wind turbine blades are also prone to ice. Generators in these areas need to face the challenge of ice for a long time, and the ice thawing device can effectively solve this problem and ensure the stable operation of the generator.

[0003] At present, the deicing technologies for wind turbine blades mainly include mechanical deicing, anti-icing agent application, coating deicing, microwave deicing and hot air deicing, mechanical vibration deicing and heating deicing. Among them, heating deicing is divided into adding a heating device inside the blade and adding a heating device outside the blade. The disadvantage of the former is that it needs to destroy the original structure inside the blade and increase the effective space to increase the installation space for the heating device. In addition, the overall structure inside the blade is strict, and a large amount of manpower and material resources are required to install the heating device. The disadvantage of the latter is that the mass is large, the installation project is troublesome, and the size needs to be customized according to different models of wind turbine blades. The adaptability is low and the economic value is low. Therefore, it is urgent to design a wind turbine blade deicing device to solve the above problems. Summary of the invention

[0004] The present invention provides a wind turbine blade deicing device to solve at least one of the problems raised by the above background technology.

[0005] To solve the above technical problems, the present invention discloses a wind turbine blade deicing device, including a deicing mechanism, wherein the deicing mechanism is arranged on a blade body, the blade body is installed on a wind turbine generator set, a control module is arranged on the wind turbine generator set, and the control module is connected to the deicing mechanism.

[0006] Preferably, the de-icing mechanism comprises: a plurality of heating belts, wherein the plurality of heating belts are arranged in a mesh structure on the circumferential side of the blade body, two ends of a plurality of elastic bands are fixedly connected to two ends of the plurality of heating belts in a one-to-one correspondence, and each of the heating belts is installed on the blade body by two aluminum alloy buckles.

[0007] Preferably, the heating belt comprises a resistance wire and an insulating waterproof coating, the outside of the resistance wire is coated with the insulating waterproof coating, and the insulating waterproof coating is made of silicone rubber.

[0008] Preferably, the control module includes:

[0009] A heating module heats and de-ices the blade body based on the de-icing mechanism, and controls the start and stop of the de-icing mechanism;

[0010] Monitoring and analysis module: Based on monitoring the ambient temperature and fan blade temperature data, monitoring data is obtained, and the monitoring data is collected and analyzed. Based on the analysis results, the de-icing mechanism is controlled to determine the heating power;

[0011] The control loop module, based on the main controller, temperature controller, switch and sensor, performs temperature control, switch control and time control on the de-icing mechanism to achieve safety protection for the fan blades, and automatically controls the heating according to different ambient temperatures, humidity, and blade materials, thickness and icing conditions.

[0012] Preferably, it also includes a wind force detection mechanism, which includes: a box body, which is fixedly installed on the top of the wind turbine generator set, and the top of the box body is fixedly connected to a shell, the upper end of the rotating shaft rotates through the top of the shell and is fixedly installed with a mounting rod, both ends of the mounting rod are respectively installed with wind cups, the middle part of the rotating shaft is fixedly installed with a bevel gear 1, and the lower end of the rotating shaft rotates through the top of the box and is fixedly connected with a support shaft, the lower end of the support shaft is rotatably connected to the bottom of the box, and the support shaft is used to drive the bird-repelling component, the two rotating shafts rotate symmetrically left and right and pass through the two side walls of the shell, and one end of the two rotating shafts is respectively fixedly installed with a bevel gear 2, and the bevel gear 2 is meshed with the bevel gear 1, and the other ends of the two rotating shafts are respectively fixedly installed with fan blades, and a rain shield is fixedly installed on the top of the shell through a support frame.

[0013] Preferably, the bird-repelling assembly is arranged in the box, and the bird-repelling assembly comprises a turntable, the turntable is fixedly mounted on the support shaft, a hollow cylinder is fixedly mounted on the bottom of the turntable, two loudspeakers are respectively embedded on the left and right side walls of the box, and two groups of sound-generating assemblies are symmetrically arranged on both sides of the box;

[0014] The sound-generating component on the left side includes: a fixed rod, the bottom of which is fixedly installed on the bottom of the box body, and the top of the fixed rod is hinged with a ball tube, both ends of the ball tube are respectively fixedly installed with a metal plate and a slider, a steel ball is embedded in the ball tube, and the top of the slider is slidably connected to the bottom of the center tube, a spring is fixedly installed on the top of the box body, and the lower end of the spring is fixedly connected to one side of the top of the ball tube.

[0015] Preferably, it also includes a deicing performance detection device, which is used for detecting the deicing effect of the wind turbine blade deicing device on the blade body after the deicing operation is performed, and the deicing performance detection device includes:

[0016] A voltmeter, used to detect the working voltage of the heating belt when the deicing mechanism is performing deicing operation on the blade body;

[0017] A temperature sensor is used to detect the temperature of the surface of the heating belt when the deicing mechanism is performing deicing operation on the blade body;

[0018] A controller and an alarm, wherein the controller is electrically connected to a voltmeter, a temperature sensor and the alarm, and the controller controls the alarm to work based on the voltmeter and the temperature sensor.

[0019] Preferably, the controller controls the alarm to work based on the voltmeter and the temperature sensor, comprising the following steps:

[0020] Step 1: According to formula (1) and the detection values ​​of the voltmeter and the temperature sensor, calculate the actual heating power P of the heating belt in the deicing mechanism when the deicing device of the wind turbine blade is working on the deicing operation of the blade body:

[0021]

[0022] Wherein, P is the actual heating power of several heating belts when the de-icing mechanism performs de-icing operation on the blade body, U is the detection value of the working voltage of the heating belt when the de-icing mechanism performs de-icing operation on the blade body by the voltmeter, d is the diameter of the resistance wire in the heating belt, C is the temperature correction coefficient of the resistance wire in the heating belt, ρ is the resistivity of the resistance wire in the heating belt, L0 is the actual length of the resistance wire at room temperature or 20°C, β is the average thermal expansion coefficient of the resistance wire, and T1 is the detection value of the surface temperature of the heating belt when the de-icing mechanism performs de-icing operation on the blade body by the temperature sensor;

[0023] Step 2: According to the following formula (2), the actual surface load W of the resistance wire when the wind turbine blade deicing device is currently performing deicing operation on the blade body is calculated. The controller compares the actual surface load W of the resistance wire when the wind turbine blade deicing device is currently performing deicing operation on the blade body with the preset surface load range of the resistance wire. When the actual surface load of the resistance wire is higher than the preset surface load range of the resistance wire, the controller controls the alarm to sound an alarm:

[0024]

[0025] Among them, W is the actual surface load of the resistance wire when the wind turbine blade deicing device performs deicing operation on the blade body, U0 is the theoretical working voltage of the resistance wire, L is the total length of the resistance wire in the deicing mechanism, and P0 is the maximum heat dissipation power allowed on the surface of the resistance wire at the current temperature.

[0026] The wind turbine blade deicing device provided by the present invention has the following beneficial effects compared with the prior art:

[0027] 1. The above-mentioned deicing mechanism cooperates with the control system module to effectively remove the ice layer on the surface of the blade body, and can automatically control the deicing of the fan blades under different environmental conditions. It can also protect the safety of the fan blades during the deicing operation. At the same time, the overall design of the above-mentioned deicing device is light, easy to disassemble and assemble, and has strong adaptability.

[0028] 2. The heating belts arranged in the above deicing mechanism are distributed in a mesh shape, so that the blade surface is heated evenly during deicing operation, which greatly speeds up the deicing efficiency and ensures the overall deicing effect of the blade. Secondly, the fixed installation method of elastic bands and aluminum alloy buckles can ensure that the deicing device can be applied to fan blades of various sizes and is safer and more reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 A schematic structural diagram of a wind turbine blade deicing device provided by an embodiment of the present invention;

[0031] Figure 2 A schematic structural diagram of a deicing mechanism of a wind turbine blade deicing device provided by an embodiment of the present invention connected to a blade body;

[0032] Figure 3 A structural schematic diagram of a wind detection mechanism of a wind turbine blade deicing device provided in an embodiment of the present invention.

[0033] Reference numerals:

[0034] 1. De-icing mechanism; 2. Blade body; 3. Wind turbine generator set; 4. Control module; 5. Heating belt; 6. Elastic band; 7. Aluminum alloy buckle; 8. Wind detection mechanism; 9. Box; 10. Shell; 11. Rotating shaft; 12. Mounting rod; 13. Wind cup; 14. Bevel gear one; 15. Support shaft; 16. Bird repellent assembly; 17. Rotating shaft; 18. Bevel gear two; 19. Fan blade; 20. Support frame; 21. Rain shield; 22. Turntable; 23. Hollow cylinder; 24. Loudspeaker; 25. Fixed rod; 26. Ball pipe; 27. Metal plate; 28. Slider; 29. ​​Steel ball; 30. Spring. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] The present invention provides the following embodiments

[0037] Example 1

[0038] The embodiment of the present invention provides a wind turbine blade deicing device, such as Figure 1-Figure 2 As shown, it includes a de-icing mechanism 1, which is arranged on a blade body 2, and the blade body 2 is installed on a wind turbine generator set 3. A control module 4 is arranged on the wind turbine generator set 3, and the control module 4 is connected to the de-icing mechanism 1.

[0039] Preferably, the de-icing mechanism 1 comprises: a plurality of heating belts 5, the plurality of heating belts 5 are arranged in a mesh structure on the circumferential side of the blade body 2, a plurality of elastic bands 6 are fixedly connected to the two ends of the plurality of heating belts 5 one by one, and each of the heating belts 5 is installed on the blade body 2 by two aluminum alloy buckles 7.

[0040] Preferably, the heating belt 5 comprises a resistance wire and an insulating waterproof coating, the outside of the resistance wire is coated with the insulating waterproof coating, and the insulating waterproof coating is made of silicone rubber.

[0041] Preferably, the control module 4 includes:

[0042] A heating module, which heats and de-ices the blade body 2 based on the de-icing mechanism 1, and controls the start and stop of the de-icing mechanism 1;

[0043] Monitoring and analysis module: Monitoring and analysis module: based on monitoring the ambient temperature and the temperature data of the fan blades, obtaining monitoring data, collecting and analyzing the monitoring data, and controlling the deicing mechanism 1 to determine the heating power based on the analysis results;

[0044] The control loop module, based on the main controller, temperature controller, switch and sensor, performs temperature control, switch control and time control on the de-icing mechanism 1, thereby realizing safety protection of the fan blades and performing automatic heating control according to different ambient temperatures, humidity, and blade materials, thickness and icing conditions;

[0045] Among them, the optional safety protection module is used to improve the structure of the heating element in the de-icing mechanism 1, and perform safety flame retardancy, overheating protection and leakage prevention treatment according to actual needs to ensure effective heat transfer.

[0046] The working principle and beneficial effects of the above technical solution are:

[0047] A wind turbine blade deicing device of the present invention includes a deicing mechanism 1 and a control module 4, which can effectively remove the ice layer on the surface of the blade body 2, and can automatically control the deicing of the wind turbine blades under different environmental conditions, and can also protect the safety of the wind turbine blades during the deicing operation. At the same time, the overall design of the above-mentioned deicing device is light, easy to disassemble and assemble, and has strong adaptability. The plurality of heating belts 5 provided in the deicing mechanism 1 are arranged in a mesh structure on the circumference of the blade body 2, so that the surface of the blade body 2 is heated evenly during deicing operation, which greatly speeds up the deicing efficiency and ensures the deicing effect of the blade body 2 as a whole. The two ends of the plurality of elastic bands 6 are fixedly connected to the two ends of the plurality of heating belts 5 in a one-to-one correspondence, and each heating belt 5 is installed on the blade body 2 through two aluminum alloy buckles 7. The fixed installation method of the elastic band 6 plus the aluminum alloy buckle 7 can ensure that the deicing device can be applied to wind turbine blades of various sizes. At the same time, the aluminum alloy buckle 7 is light in weight, has good corrosion resistance, is easy to install and disassemble, can withstand greater tension and pressure, and ensures that the connection or fixation is safer and more reliable. The heating belt 5 includes a resistance wire and an insulating waterproof coating. The outer surface of the resistance wire is coated with the insulating waterproof coating, and the insulating waterproof coating is made of silicone rubber, which has excellent high and low temperature resistance, electrical insulation and moisture resistance.

[0048] The control module 4 heats and de-ices the blade body 2 based on the de-icing mechanism 1 through the heating module, and controls the start and shut down of the de-icing mechanism 1; the safety protection module is used to improve the structure of the heating element in the de-icing mechanism 1, and perform safety flame retardancy, overheating protection and leakage prevention according to actual needs to ensure effective heat transfer; the monitoring and analysis module monitors based on the ambient temperature and the temperature data of the fan blade, and collects and analyzes the monitoring data to control the de-icing mechanism 1 to determine parameters such as heating power; the control loop module controls the temperature, switch and time of the de-icing mechanism 1 based on the main controller, temperature controller, switch and sensor, and realizes the safety protection of the fan blade, and performs automatic heating control for different ambient temperatures, humidity, and the material, thickness and icing conditions of the blade. The invention can make the wind turbine blade de-icing device more efficient in completing the de-icing operation of the blade body 2, while ensuring the overall de-icing effect.

[0049] The above-mentioned wind turbine blade deicing device firstly does not need to destroy the original internal structure of the blade to increase the effective space inside the blade to increase the installation space of the heating device, and at the same time does not need to mobilize a large amount of manpower and material resources to install the deicing device; secondly, the deicing device is lightweight, quick and convenient to assemble and disassemble, does not need to be customized according to the size of different models of wind turbine blades, has low adaptability and economic value, and can reduce the work efficiency of the installation staff.

[0050] Example 2

[0051] On the basis of Example 1, Figure 1 , Figure 3 As shown, it also includes a wind force detection mechanism 8, which includes: a box body 9, the box body 9 is fixedly installed on the top of the wind turbine generator set 3, and the top of the box body 9 is fixedly connected to a shell 10, the upper end of the rotating shaft 11 rotates through the top of the shell 10 and is fixedly installed with a mounting rod 12, and the two ends of the mounting rod 12 are respectively installed with wind cups 13, the middle part of the rotating shaft 11 is fixedly installed with a bevel gear 14, and the lower end of the rotating shaft 11 rotates through the top of the box body 9 and is fixedly connected There is a support shaft 15, the lower end of the support shaft 15 is rotatably connected to the bottom of the box body 9, and the support shaft 15 is used to drive the bird-repelling component 16. Two rotating shafts 17 rotate symmetrically left and right and pass through the two side walls of the shell 10, and one end of the two rotating shafts 17 is respectively fixedly installed with bevel gears 18, and the bevel gears 18 are meshed with the bevel gears 14. The other ends of the two rotating shafts 17 are respectively fixedly installed with fan blades 19, and the top of the shell 10 is fixedly installed with a rain shield 21 through a support frame 20.

[0052] Preferably, the bird-repelling component 16 is arranged in the box 9, and the bird-repelling component 16 includes a turntable 22, the turntable 22 is fixedly mounted on the support shaft 15, a hollow cylinder 23 is fixedly mounted on the bottom of the turntable 22, two loudspeakers 24 are respectively embedded on the left and right side walls of the box 9, and two groups of sound-generating components are symmetrically arranged on both sides of the box 9;

[0053] The sound-generating component on the left side includes: a fixed rod 25, the bottom of which is fixedly installed at the bottom of the box body 9, and the top of the fixed rod 25 is hinged with a ball tube 26, and the two ends of the ball tube 26 are respectively fixedly installed with a metal plate 27 and a slider 28, a steel ball 29 is embedded in the ball tube 26, and the top of the slider 28 is slidably connected to the bottom of the center tube, a spring is fixedly installed at the top of the box body 9, and the lower end of the spring is fixedly connected to one side of the top of the ball tube 26.

[0054] The working principle and beneficial effects of the above technical solution are:

[0055] The wind force detection mechanism 8 provided in the above-mentioned wind turbine blade deicing device can be used to detect the wind force during the operation of the wind turbine 3, improve the safety of the operation of the wind turbine blade 3, and at the same time, drive away the birds around the wind turbine 3 to prevent the birds from gathering and affecting the overall safety of the wind turbine 3. Through the box body 9 fixedly installed on the top of the wind turbine 3, and the top of the box body 9 is fixedly connected with a shell 10, the upper end of the rotating shaft 11 rotates through the top of the shell 10 and is fixedly installed with a mounting rod 12, and the two ends of the mounting rod 12 are respectively installed with wind cups 13. Through the rotation of the wind cup 13, the rotation of the rotating shaft 11 will be driven, so that the multi-toothed cut-off disc or magnetic rod connected to the rotating shaft 11 rotates. Through the circuit, a pulse signal proportional to the rotation speed of the wind cup 13 can be obtained. The pulse signal is counted by a counter, and the actual wind speed value can be obtained after conversion. At the same time, a bevel gear 14 is fixedly installed in the middle of the rotating shaft 11, and the lower end of the rotating shaft 11 rotates through the top of the box 9 and is fixedly connected to a support shaft 15, the lower end of the support shaft 15 is rotatably connected to the bottom of the box 9, and the support shaft 15 is used to drive the bird-repelling component 16, so that the bird-repelling component 16 drives the birds around the wind turbine 3. The two rotating shafts 17 rotate symmetrically and penetrate the two side walls of the shell 10, and one end of the two rotating shafts 17 is respectively fixedly installed with a bevel gear 2 18, and the bevel gear 2 18 is meshed with the bevel gear 14, and the meshing transmission of the bevel gear 2 18 and the bevel gear 14 drives the fan blades 19 fixedly installed on the two rotating shafts 17 to rotate synchronously, so as to avoid the gathering of small animals such as insects around the wind detection mechanism 8, thereby affecting the accuracy of the wind speed measurement of the wind detection mechanism 8. A rain shield 21 is fixedly installed on the top of the shell 10 through a support frame 20. The rain shield 21 can prevent the wall of the wind detection mechanism 8 from being affected by bad weather, and effectively protect the electrical components inside the wind detection mechanism 8.

[0056] By setting the bird-repelling component 16, when the wind cup 13 in the wind force detection mechanism 8 rotates, it will drive the fixedly connected rotating shaft 11 to rotate synchronously. At this time, the rotating shaft 11 drives the fixedly connected supporting shaft 15 to rotate synchronously, so that the turntable 22 fixedly installed on the supporting shaft 15 rotates synchronously. The bottom of the fixed rod 25 is fixedly installed at the bottom of the box body 9, and the top of the fixed rod 25 is hinged with a ball pipe 26. The two ends of the ball pipe 26 are respectively fixedly installed with a metal plate 27 and a slider 28. The steel ball 29 is embedded in the ball pipe 26, and the top of the slider 28 is slidably connected to the bottom of the center tube. The spring It is fixedly installed on the top of the box body 9. When the turntable 22 rotates, the fixedly connected center tube drives to rotate, so that the center tube presses the slider 28. Under the action of the spring, the two ends of the ball tube 26 are made to swing up and down along the top of the fixed rod 25, so that the steel ball 29 in the ball tube 26 slides left and right and hits the metal plate 27 to make a sound. The lower end of the spring is fixedly connected to one side of the top of the ball tube 26, which can ensure that the center tube and the slider 28 are always in contact. The steel ball 29 slides left and right and hits the metal plate 27 to make a sound, and the sound is amplified under the action of the loudspeaker 24, thereby effectively driving away birds.

[0057] Example 3

[0058] A wind turbine blade deicing device described on the basis of embodiment 1 or 2 further includes a deicing performance detection device, which is used for detecting the deicing effect of the wind turbine blade deicing device on the blade body 2 after the deicing operation is performed, and the deicing performance detection device includes:

[0059] A voltmeter, used to detect the working voltage of the heating belt 5 when the deicing mechanism 1 performs deicing operation on the blade body 2;

[0060] A temperature sensor, used to detect the temperature of the surface of the heating belt 5 when the deicing mechanism 1 performs deicing operation on the blade body 2;

[0061] A controller and an alarm, wherein the controller is electrically connected to a voltmeter, a temperature sensor and the alarm, and the controller controls the alarm to work based on the voltmeter and the temperature sensor.

[0062] Preferably, the controller controls the alarm to work based on the voltmeter and the temperature sensor, comprising the following steps:

[0063] Step 1: According to formula (1) and the detection values ​​of the voltmeter and the temperature sensor, calculate the actual heating power P of the heating belt 5 in the deicing mechanism 1 when the deicing device of the wind turbine blade is working on the blade body 2:

[0064]

[0065] Wherein, P is the actual heating power of the heating belt 5 when the de-icing mechanism 1 performs de-icing operation on the blade body 2, U is the detection value of the working voltage of the heating belt 5 when the de-icing mechanism 1 performs de-icing operation on the blade body 2 by the voltmeter, d is the diameter of the resistance wire in the heating belt 5, C is the temperature correction coefficient of the resistance wire in the heating belt 5, ρ is the resistivity of the resistance wire in the heating belt 5 (unit is 10 -6 Ω·m), L0 is the actual length of the resistance wire at room temperature or 20°C, β is the average thermal expansion coefficient of the resistance wire (in m / K), and T1 is the detection value of the surface temperature of the heating belt 5 by the temperature sensor when the deicing mechanism 1 performs deicing operation on the blade body 2;

[0066] Step 2: According to the following formula (2), the actual surface load W of the resistance wire when the wind turbine blade deicing device is currently performing deicing operation on the blade body 2 is calculated. The controller compares the actual surface load W of the resistance wire when the wind turbine blade deicing device is currently performing deicing operation on the blade body 2 with the preset surface load range of the resistance wire. When the actual surface load of the resistance wire is higher than the preset surface load range of the resistance wire, the controller controls the alarm to sound an alarm:

[0067]

[0068] Among them, W is the actual surface load of the resistance wire when the wind turbine blade deicing device performs deicing operation on the blade body 2, U0 is the theoretical working voltage of the resistance wire, L is the total length of the resistance wire in the deicing mechanism 1, and P0 is the maximum heat dissipation power allowed on the surface of the resistance wire at the current temperature (obtained by looking up the table).

[0069] The beneficial effects of the above technical solution are as follows: first, according to formula (1) and the detection values ​​of the voltmeter and the temperature sensor, the actual heating power of the heating belt 5 when the de-icing mechanism 1 performs de-icing operation on the blade body 2 is calculated; by comprehensively considering the voltage of the heating belt 5 when the de-icing mechanism 1 performs de-icing operation on the blade body 2, the diameter of the resistance wire in the heating belt 5, the temperature correction coefficient of the resistance wire in the heating belt 5, the resistivity of the resistance wire in the heating belt 5, the actual length of the resistance wire at room temperature or 20°C, the average thermal expansion coefficient of the resistance wire, and the surface temperature of the heating belt 5 when the de-icing mechanism 1 performs de-icing operation on the blade body 2, the calculation result is more accurate and reliable.

[0070] Then, according to formula (2), the actual surface load of the resistance wire when the current wind turbine blade deicing device performs deicing operation on the blade body 2 is calculated, and the theoretical working voltage of the resistance wire, the total length of the resistance wire in the deicing mechanism 1, and the maximum heat dissipation power allowed on the surface of the resistance wire at the current temperature are comprehensively considered, so that the calculation result is more accurate and reliable;

[0071] The controller controls the operation of the voltmeter, the temperature sensor and the alarm. If the actual surface load of the resistance wire is higher than the preset surface load range of the resistance wire when the wind turbine blade de-icing device is currently performing de-icing operation on the blade body 2, the controller controls the alarm to sound an alarm, thereby reminding the staff to promptly inspect the de-icing device, and perform maintenance on the wind turbine blade de-icing device according to the actual inspection results to maintain the use requirements of the wind turbine blade de-icing device, while ensuring the normal operation of the wind turbine blades as a whole and reducing energy loss, and effectively improving the service life of the wind turbine blades, further meeting the use requirements of the wind turbine blade de-icing device for operational reliability and stability, and by real-time monitoring of the working status of the wind turbine blade de-icing device during operation, not only the efficiency of the wind turbine blade de-icing device for de-icing the wind turbine blades is increased, but also it is ensured that the wind turbine blade de-icing device can be quickly discovered and repaired in a timely manner after a failure occurs.

[0072] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A wind turbine blade deicing device, characterized in that: The invention comprises a deicing mechanism (1), wherein the deicing mechanism (1) is arranged on a blade body (2), the blade body (2) is mounted on a wind turbine generator set (3), a control module (4) is arranged on the wind turbine generator set (3), and the control module (4) is connected to the deicing mechanism (1).

2. A wind turbine blade deicing device according to claim 1, characterized in that: The deicing mechanism (1) comprises: a plurality of heating belts (5), the plurality of heating belts (5) being arranged on the circumference of the blade body (2) in a mesh structure, a plurality of elastic bands (6) having two ends fixedly connected to the two ends of the plurality of heating belts (5) in a one-to-one correspondence, and each of the heating belts (5) being mounted on the blade body (2) via two aluminum alloy buckles (7).

3. A wind turbine blade deicing device according to claim 2, characterized in that: The heating belt (5) comprises a resistance wire and an insulating waterproof coating, the outside of the resistance wire is coated with the insulating waterproof coating, and the insulating waterproof coating is made of silicone rubber.

4. A wind turbine blade deicing device according to claim 1, characterized in that: The control module (4) comprises: A heating module is used to heat and de-ice the blade body (2) based on the de-icing mechanism (1), and to control the start and stop of the de-icing mechanism (1); A monitoring and analysis module, based on monitoring the ambient temperature and the temperature data of the fan blades, obtains monitoring data, collects and analyzes the monitoring data, and controls the deicing mechanism (1) to determine the heating power based on the analysis results; The control loop module, based on the main controller, the temperature controller, the switch and the sensor, performs temperature control, switch control and time control on the de-icing mechanism (1), thereby realizing safety protection for the fan blades and performing automatic heating control according to different ambient temperatures, humidity, and the material, thickness and icing conditions of the blades.

5. A wind turbine blade deicing device according to claim 1, characterized in that: The invention also comprises a wind force detection mechanism (8), wherein the wind force detection mechanism (8) comprises: a box (9), wherein the box (9) is fixedly mounted on the top of the wind power generator set (3), and the top of the box (9) is fixedly connected to a shell (10), the upper end of a rotating shaft (11) rotates through the top of the shell (10) and is fixedly mounted with a mounting rod (12), both ends of the mounting rod (12) are respectively mounted with wind cups (13), a bevel gear (14) is fixedly mounted in the middle of the rotating shaft (11), and the lower end of the rotating shaft (11) rotates through the top of the box (9) and is fixedly connected to a support A support shaft (15), the lower end of which is rotatably connected to the bottom of the box body (9), and the support shaft (15) is used to drive a bird-repelling assembly (16). Two rotating shafts (17) rotate symmetrically and penetrate the two side walls of the shell (10). One end of the two rotating shafts (17) is respectively fixedly mounted with a bevel gear 2 (18), and the bevel gear 2 (18) is meshed with the bevel gear 1 (14). The other ends of the two rotating shafts (17) are respectively fixedly mounted with a fan blade (19). A rain shield (21) is fixedly mounted on the top of the shell (10) through a support frame (20).

6. A wind turbine blade deicing device according to claim 5, characterized in that: The bird-repelling component (16) is arranged in the box (9), and the bird-repelling component (16) comprises a turntable (22), the turntable (22) is fixedly mounted on the support shaft (15), a hollow cylinder (23) is fixedly mounted on the bottom of the turntable (22), two loudspeakers (24) are respectively embedded on the left and right side walls of the box (9), and two groups of sound-generating components are symmetrically arranged on both sides of the box (9); The sound-generating component on the left side comprises: a fixed rod (25), the bottom of the fixed rod (25) is fixedly mounted on the bottom of the box body (9), and the top of the fixed rod (25) is hinged with a ball pipe (26), the two ends of the ball pipe (26) are respectively fixedly mounted with a metal plate (27) and a slider (28), a steel ball (29) is embedded in the ball pipe (26), and the top of the slider (28) is slidably connected to the bottom of the center tube, a spring is fixedly mounted on the top of the box body (9), and the lower end of the spring is fixedly connected to one side of the top of the ball pipe (26).

7. A wind turbine blade deicing device according to claim 1, characterized in that: It also includes deicing performance detection equipment, which is used for detecting the deicing effect of the wind turbine blade deicing device on the blade body (2) after the deicing operation is performed, and the deicing performance detection equipment includes: A voltmeter, used to detect the working voltage of the heating belt (5) when the deicing mechanism (1) is performing a deicing operation on the blade body (2); A temperature sensor for detecting the temperature of the surface of the heating belt (5) when the deicing mechanism (1) is performing a deicing operation on the blade body (2); A controller and an alarm, wherein the controller is electrically connected to a voltmeter, a temperature sensor and the alarm, and the controller controls the alarm to work based on the voltmeter and the temperature sensor.

8. A wind turbine blade deicing device according to claim 7, characterized in that: The controller controls the alarm to work based on the voltage meter and the temperature sensor, including the following steps: Step 1: According to formula (1) and the detection values ​​of the voltmeter and the temperature sensor, calculate the actual heating power P of the heating belt (5) in the deicing mechanism (1) when the deicing device of the wind turbine blade is working on the blade body (2): Wherein, P is the actual heating power of the heating belt (5) when the deicing mechanism performs deicing operation on the blade body (2), U is the detection value of the working voltage of the heating belt (5) when the deicing mechanism (1) performs deicing operation on the blade body (2), d is the diameter of the resistance wire in the heating belt (5), C is the temperature correction coefficient of the resistance wire in the heating belt (5), ρ is the resistivity of the resistance wire in the heating belt (5), L0 is the actual length of the resistance wire at room temperature or 20°C, β is the average thermal expansion coefficient of the resistance wire, and T1 is the detection value of the surface temperature of the heating belt (5) when the deicing mechanism (1) performs deicing operation on the blade body (2) by the temperature sensor; Step 2: According to the following formula (2), the actual surface load W of the resistance wire when the wind turbine blade deicing device is currently performing a deicing operation on the blade body (2) is calculated, and the controller compares the actual surface load W of the resistance wire when the wind turbine blade deicing device is currently performing a deicing operation on the blade body (2) with a preset surface load range of the resistance wire. When the actual surface load of the resistance wire is higher than the preset surface load range of the resistance wire, the controller controls the alarm to sound an alarm: Wherein, W is the actual surface load of the resistance wire when the wind turbine blade deicing device performs deicing operation on the blade body (2), U0 is the theoretical working voltage of the resistance wire, L is the total length of the resistance wire in the deicing mechanism (1), and P0 is the maximum heat dissipation power allowed on the surface of the resistance wire at the current temperature.

Images