Wind turbine generator blade deicing device and deicing method

Abstract

The invention relates to the technical field of wind power plant maintenance equipment, in particular to a wind turbine generator blade deicing device and deicing method. The device mainly comprises a U-shaped frame, a rear edge abutting device, a front edge abutting wheel and a pipe belt pulling device, an air heater is arranged on the U-shaped frame, a hot air main pipe of the air heater is connected with an air outlet pipe belt, the air outlet pipe belt is fixed to the pipe belt pulling device after bypassing blades, and the pipe belt pulling device is used for pulling the air outlet pipe belt. The device can walk on the blade and can be effectively clamped on the blade along with the change of the shape of the blade, ice on the blade is effectively removed through hot air in the walking process of the blade, and the deicing effect of the device can be improved.

Description

Technical Field

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

[0002] Wind power generation is very sensitive to changes in meteorological conditions and has a certain degree of instability. In areas with humid climates in winter and spring, ice on wind turbine blades becomes the main factor affecting the normal operation of wind farms. When the blades are covered with ice, the aerodynamic characteristics of the blades change and the dynamic load of the unit increases, which will have a negative impact on the safe operation and benefits of the wind farm.

[0003] Existing technology uses manpower to remove ice, which is extremely risky and has high technical and safety requirements for personnel. It also poses great safety risks and is therefore not recommended.

[0004] By installing a heating device inside the blade, it is necessary to modify the internal electrical circuit of the pitch control system, increase the power consumption of the power module, reset the control system, install a heater, etc. The equipment installation and procurement cost is high, and the risk of changing the electrical system in the rotating part without testing the safety of the equipment is high, which can easily cause unit failure and reduce the unit availability.

[0005] The de-icing agent is carried by drones and pumped. This method is greatly affected by environmental factors. At the same time, it is difficult to control when de-icing blades in different directions. The accuracy of de-icing agent spraying is low and the coverage area is low. In winter, the blades are covered with thick ice and the friction is low. Only horizontal blades can be sprayed. It is difficult to spray the attached de-icing agent on the blades perpendicular to the ground, which affects the de-icing effect. Summary of the invention

[0006] The object of the present invention is to provide a wind turbine blade deicing device and deicing method to solve the above-mentioned problems in the prior art.

[0007] The present invention is achieved through the following technical solutions:

[0008] The present invention provides a wind turbine blade deicing device and deicing method, comprising a U-shaped frame, a trailing edge abutment, a leading edge abutment wheel and a pipe belt puller;

[0009] The front edge abutment wheel is fixed on the U-shaped frame;

[0010] The U-shaped frame is also connected to a plurality of flat support wheels;

[0011] The trailing edge abutment is mounted on the U-shaped frame and is used to adjust its position according to the deformation of the trailing edge of the blade so as to abut against the trailing edge;

[0012] A hot air blower is arranged on the U-shaped frame, and the hot air main pipe of the hot air blower is connected to the air outlet duct belt. The air outlet duct belt is fixed to the duct belt puller after passing around the blades. The duct belt puller is used to pull the air outlet duct belt so that the air outlet duct belt is wound around the blades as the shape of the blades changes.

[0013] Preferably, the trailing edge abutment device comprises two trailing edge abutment wheels, a abutment rod is fixed on the wheel frame of each trailing edge abutment wheel, the two abutment rods are connected and fixed by a cross bar, a screw rod is fixed on the cross bar, the screw rod is threadedly connected with the screw sleeve, and a driving pinion is fixed on the screw sleeve;

[0014] Preferably, a plurality of fixed ear plates are connected to the U-shaped frame, wherein two of the fixed ear plates are connected via an abutting motor seat plate, an abutting motor is fixed on the abutting motor seat plate, an output shaft of the abutting motor is fixed to a driving main gear, and the driving main gear is meshed with the driving sub-gear.

[0015] Preferably, the pipe belt puller includes a belt winding pulley and a fixed shell, the fixed shell is fixed on the U-shaped frame, both ends of the belt winding pulley shaft are connected to the fixed shell through bearings, a belt winding worm gear is fixed on the belt winding pulley shaft, a belt winding motor is fixed in the fixed shell, the output shaft of the belt winding motor is fixed to the worm, and the worm is meshed with the belt winding worm gear.

[0016] Preferably, the U-shaped frame includes two U-shaped rods, and the two U-shaped rods are connected and fixed by a plurality of cross arms.

[0017] Preferably, the air outlet duct belt comprises a hot air duct belt, and both ends of the hot air duct belt are connected and fixed to rubber column belts.

[0018] Preferably, a driving device for driving the flat support wheels to move is also fixed on the U-shaped frame.

[0019] Preferably, the driving device comprises a driving motor, an output shaft of the driving motor is fixed to a driving main gear, and the driving main gear is meshed with a driving sub-gear fixed on the driving shaft.

[0020] The present invention also provides a deicing method for a wind turbine blade deicing device, comprising the above-mentioned wind turbine blade deicing device, and further comprising:

[0021] Determine the abutment speed of the trailing edge abutment device according to the width change between the trailing edge and the leading edge of the blade;

[0022] The speed of the belt winding motor is adjusted according to the transmission ratio of the worm gear and the speed of the belt winding wheel;

[0023] During deicing, the air outlet duct is wound around the blade and fixed on the belt winding wheel, and then the driving motor, the belt winding motor, the abutting motor and the hot air blower are started simultaneously. When the driving motor drives the device to move on the blade, the abutting wheel abuts against the trailing edge of the blade in real time, so that the device is clamped on the blade in real time;

[0024] At the same time, the air outlet duct is wrapped around the blades in real time, and the hot air from the hot air blower enters the air outlet duct, and is discharged through the air outlet holes on the air outlet duct to remove the ice on the blades.

[0025] The technical solution of the embodiment of the present invention has at least the following advantages and beneficial effects:

[0026] The device provided by the present invention mainly includes a U-shaped frame, a rear edge abutment, a front edge abutment wheel and a pipe belt puller. A hot air blower is arranged on the U-shaped frame. The hot air main pipe of the hot air blower is connected to the air outlet pipe belt. The air outlet pipe belt is fixed to the pipe belt puller after passing around the blades. The pipe belt puller is used to pull the air outlet pipe belt. The device of the present invention can walk on the blades and can be effectively clamped on the blades as the shape of the blades changes. In the process of walking on the blades, the ice on the blades can be effectively removed by hot air, which can improve its deicing effect.

[0027] The present invention realizes effective removal of ice on the blades by winding the air outlet duct belt around the blades, thereby improving the deicing effect. At the same time, the winding length of the air outlet duct belt can be changed as the device moves, so that it can be wound around the blades at different positions of the blades. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0029] Figure 1 It is a front view of the present invention;

[0030] Figure 2 A top view of the present invention;

[0031] Figure 3 for Figure 1 AA section view;

[0032] Figure 4 for Figure 1 BB section view;

[0033] Figure 5 This is the front view of the present invention when in use;

[0034] Figure 6 A top view of the present invention when in use;

[0035] In the figure: 1-U-shaped frame, 2-rear edge abutting wheel, 3-abutting rod, 4-abutting motor seat plate, 5-abutting motor, 6-main gear, 7-abutting sub-gear, 8-screw sleeve, 9-fixing ear plate, 10-flat support wheel, 11-driving main gear, 12-driving sub-gear, 13-driving motor, 14-driving shaft, 15-front edge abutting wheel, 16-air outlet duct belt, 18-winding pulley, 19-worm, 20-winding motor, 21-fixed shell, 22-winding worm gear, 23-hot air blower, 24-hot air main pipe, 25-cross bar, 26-U-shaped rod, 27-cross arm, 28-screw rod, 29-pulley shaft, 30-rubber column belt, 31-hot air duct belt, 32-air outlet, 33-front edge, 34-web, 35-blade, 36-rear edge. DETAILED DESCRIPTION

[0036] In order to make the purpose, 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 in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0037] Please refer to Figure 1-Figure 6 , a wind turbine blade 35 deicing device, which comprises: a U-shaped frame 1, a trailing edge abutment, a leading edge 33 abutment wheel 15 and a pipe belt puller;

[0038] The front edge 33 is fixed to the U-shaped frame 1 against the wheel 15;

[0039] A plurality of flat support wheels 10 are also fixed on the U-shaped frame 1;

[0040] The trailing edge abutment is mounted on the U-shaped frame 1 and is used to adjust the position of the trailing edge 36 of the blade 35 according to the deformation so as to abut against the trailing edge 36;

[0041] The flat support wheel 10 is used to support the web 34 of the blade 35, the front edge 33 abutting wheel 15 is used to abut against the front edge 33, and the rear edge abutting wheel 2 of the rear edge abutting device is used to abut against the rear edge 36, so that the blade 35 can be effectively clamped to prevent the device from being separated from the blade 35;

[0042] The rear edge abutment wheel 2 can move with the movement of the device, so that it can always keep abutting against the rear edge 36;

[0043] A hot air blower 23 is fixed on the U-shaped frame 1. The hot air blower 23 is a commonly used hot air blower 23 on the market, which can blow out hot air. The hot air enters the air outlet duct belt 16 through the hot air pipe 24. The hot air pipe 24 is a hard pipe. The hot air pipe 24 of the hot air blower 23 is connected to the air outlet duct belt 16. The air outlet duct belt 16 is fixed to the duct puller after passing around the blades 35. The duct puller is used to pull the air outlet duct belt 16 so that the air outlet duct belt 16 is wrapped around the blades 35 as the shape of the blades 35 changes.

[0044] During the movement of the device, the width between the leading edge 33 and the trailing edge 36 changes gradually, so that the length of the air outlet duct belt 16 is adjusted in real time according to the change in the shape of the blade 35, so that it can always remain in contact with the blade 35 to ensure its air outlet and de-icing effect.

[0045] The rear edge abutment device comprises two rear edge abutment wheels 2, each of which has an abutment rod 3 fixed on its wheel frame, the two abutment rods 3 are connected and fixed by a cross bar 25, a screw rod 28 is fixed on the cross bar 25 and is threadedly connected with a screw sleeve 8, the screw sleeve 8 is rotatably connected with a fixed ear plate 9 on the U-shaped frame 1, and a driving sub-gear 12 is fixed on the screw sleeve 8;

[0046] A plurality of fixed ear plates 9 are connected to the U-shaped frame 1, wherein two fixed ear plates 9 are connected via a seat plate 4 of the abutting motor 5, abutting motor 5 is fixed on the seat plate 4 of the abutting motor 5, an output shaft of the abutting motor 5 is fixed to a driving main gear 11, and the driving main gear 11 is meshed with a driving sub-gear 12.

[0047] The pipe belt puller includes a belt winding pulley 18 and a fixed shell 21. The fixed shell 21 is fixed on the U-shaped frame 1. Both ends of the pulley shaft 29 of the belt winding pulley 18 are connected to the fixed shell 21 through bearings. A belt winding worm gear 22 is fixed on the pulley shaft 29. A belt winding motor 20 is fixed in the fixed shell 21. The output shaft of the belt winding motor 20 is fixed to the worm 19, and the worm 19 is meshed with the belt winding worm gear 22.

[0048] In one embodiment, the U-shaped frame 1 includes two U-shaped rods 26 , and the two U-shaped rods 26 are connected and fixed by a plurality of cross arms 27 .

[0049] In one embodiment, the air outlet duct belt 16 includes a hot air duct belt 31, both ends of the hot air duct belt 31 are connected and fixed to the rubber column belt 30, and the structure of the air outlet duct belt 16 is configured to include two rubber column belts 30, and the two rubber column belts 30 are respectively adhered and fixed to the two sides of the hot air duct belt 31, so that when the air outlet duct belt 16 is wrapped around the blades 35, the rubber column belt 30 can provide support to prevent the air outlet duct belt 16 from encountering a turning part and causing it to become flat, thereby preventing air from being discharged.

[0050] A driving device for driving the flat support wheels 10 to travel is also fixed on the U-shaped frame 1.

[0051] The driving device includes a driving motor 13, the output shaft of the driving motor 13 is fixed to the driving main gear 11, the driving main gear 11 is meshed with the driving sub-gear 12 fixed on the driving shaft 14, and the two flat support wheels 10 share a driving shaft 14, so that the driving main gear 11 is driven to rotate by the driving motor 13, and the driving main gear 11 is meshed with the driving sub-gear 12, so that the driving shaft 14 rotates, thereby realizing the power drive of the device, so that the device moves on the blade 35;

[0052] A deicing method for a wind turbine blade deicing device, the method comprising the following steps:

[0053] The abutment speed of the trailing edge abutment device is determined according to the width change between the trailing edge 36 and the leading edge 33 of the blade 35, the length of the web 34 of the blade 35 is set to B, the width between the leading edge 33 and the trailing edge 36 at the root of the blade 35 is set to L1, the width between the leading edge 33 and the trailing edge 36 at the tip of the blade 35 is set to L2, and the width difference between the leading edge 33 and the trailing edge 36 of the blade 35 is P=L1-L2;

[0054] The gear ratio between the driving main gear 11 and the driving sub-gear 12 is: , the driving motor 13 is a reduction motor, the speed is A r / min, the time for the driving motor 13 to rotate one circle is min, the diameter of the flat support wheel 10 is D, the length of the flat support wheel 10 to rotate one circle is πD, and the width of the front edge 33 and the rear edge 36 of the flat support wheel 10 to rotate one circle is C;

[0055] The pitch of the screw rod 28 is set to Q, and the distance that the screw rod 28 slides when the screw sleeve 8 rotates one circle is Q. Then the length of the screw movement C and the number of circles that the screw sleeve 8 needs to rotate is S;

[0056] The abutting motor 5 is a reduction motor, and the gear ratio between the main gear 6 and the abutting pinion 7 is also :, so the speed of the abutting motor 5 needs to be set to SA r / min;

[0057] The diameter of the belt winding wheel 18 is K, and the length of one circle of the belt winding wheel 18 is πK. Then, the length of the air outlet duct belt 16 that needs to be wound in the time min is C, and the number of circles required is, so the speed of the belt winding wheel 18 is A r / min;

[0058] According to the transmission ratio of the worm gear 19, the speed of the belt winding motor 20 is adjusted by the speed of the belt winding wheel 18;

[0059] During de-icing, the air outlet duct belt 16 is passed around the blade 35 and then fixed on the belt winding wheel 18, and then the drive motor 13, the belt winding motor 20, the abutment motor 5 and the hot air blower 23 are started simultaneously. When the drive motor 13 drives the device to move on the blade 35, the abutment wheel abuts against the rear edge 36 of the blade 35 in real time, so that the device is clamped on the blade 35 in real time. At the same time, the air outlet duct belt 16 is wrapped around the blade 35 in real time, and the hot air from the hot air blower 23 enters the air outlet duct belt 16, and is discharged through the air outlet holes 32 on the air outlet duct belt 16, so that the ice on the blade 35 is effectively removed.

[0060] The driving principle of the device is as follows: the two flat support wheels 10 share a driving shaft 14, so that the driving motor 13 drives the driving main gear 11 to rotate, and the driving main gear 11 is meshed with the driving sub-gear 12 to rotate the driving shaft 14, thereby realizing the power drive of the device, so that the device moves on the blade 35;

[0061] The principle of the rear edge abutment device abutting the rear edge 36 in real time: when the device is moving, the abutment motor 5 is started, driving the main gear 6 to rotate, the main gear 6 is meshed with the abutment sub-gear 7, so that it drives the screw sleeve 8 to rotate, the screw sleeve 8 is meshed with the screw rod 28, and the screw rod slides, so that the rear edge abutment wheel 2 can abut against the rear edge 36 in real time;

[0062] The principle of the duct puller pulling the air outlet duct belt 16 to be wound around the blades 35 in real time is as follows: when the device is moving, the belt winding motor 20 rotates, causing its worm 19 to rotate, and the worm 19 engages with the belt winding worm wheel 22 to rotate the belt winding pulley 18, thereby pulling the air outlet duct belt 16 to be wound around the belt winding pulley 18, so that the length of the air outlet duct belt 16 wound around the blades 35 changes in real time, so that it is wound around the blades 35 in real time.

[0063] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A wind turbine blade deicing device, characterized in that: It includes a U-shaped frame, a rear edge abutment, a front edge abutment wheel and a pipe belt puller; The front edge abutment wheel is fixed on the U-shaped frame; The U-shaped frame is also connected to a plurality of flat support wheels; The trailing edge abutment is mounted on the U-shaped frame and is used to adjust its position according to the deformation of the trailing edge of the blade so as to abut against the trailing edge; A hot air blower is arranged on the U-shaped frame, and the hot air main pipe of the hot air blower is connected to the air outlet duct belt. The air outlet duct belt is fixed to the duct belt puller after passing around the blades. The duct belt puller is used to pull the air outlet duct belt so that the air outlet duct belt is wound around the blades as the shape of the blades changes.

2. A wind turbine blade deicing device according to claim 1, characterized in that: The trailing edge abutment device comprises two trailing edge abutment wheels, each of which has an abutment rod fixed on its wheel frame, the two abutment rods being connected and fixed via a cross bar, a screw rod being fixed on the cross bar, the screw rod being threadedly connected to a screw sleeve, and a driving sub-gear being fixed on the screw sleeve.

3. A wind turbine blade deicing device according to claim 2, characterized in that: A plurality of fixed ear plates are connected to the U-shaped frame, wherein two of the fixed ear plates are connected via an abutting motor seat plate, an abutting motor is fixed to the abutting motor seat plate, an output shaft of the abutting motor is fixed to a driving main gear, and the driving main gear is meshed with the driving sub-gear.

4. A wind turbine blade deicing device according to claim 3, characterized in that: The pipe belt puller includes a belt winding wheel and a fixed shell, the fixed shell is fixed on the U-shaped frame, both ends of the belt winding wheel shaft are connected to the fixed shell through bearings, a belt winding worm wheel is fixed on the belt winding wheel shaft, a belt winding motor is fixed in the fixed shell, the output shaft of the belt winding motor is fixed to the worm, and the worm is meshed with the belt winding worm wheel.

5. A wind turbine blade deicing device according to claim 4, characterized in that: The U-shaped frame includes two U-shaped rods, and the two U-shaped rods are connected and fixed by a plurality of cross arms.

6. A wind turbine blade deicing device according to claim 5, characterized in that: The air outlet duct belt comprises a hot air duct belt, and both ends of the hot air duct belt are connected and fixed to the rubber column belt.

7. A wind turbine blade deicing device according to claim 6, characterized in that: A driving device for driving the flat support wheels to travel is also fixed on the U-shaped frame.

8. A wind turbine blade deicing device according to claim 7, characterized in that: The driving device comprises a driving motor, the output shaft of the driving motor is fixed to a driving main gear, and the driving main gear is meshed with a driving sub-gear fixed on the driving shaft.

9. A deicing method for a wind turbine blade deicing device, characterized in that: A wind turbine blade deicing device comprising any one of claims 1 to 8, further comprising: Determine the abutment speed of the trailing edge abutment device according to the width change between the trailing edge and the leading edge of the blade; The speed of the belt winding motor is adjusted according to the transmission ratio of the worm gear and the speed of the belt winding wheel; During deicing, the air outlet duct is wound around the blade and fixed on the belt winding wheel, and then the driving motor, the belt winding motor, the abutting motor and the hot air blower are started simultaneously. When the driving motor drives the device to move on the blade, the abutting wheel abuts against the trailing edge of the blade in real time, so that the device is clamped on the blade in real time; At the same time, the air outlet duct is wrapped around the blades in real time, and the hot air from the hot air blower enters the air outlet duct, and is discharged through the air outlet holes on the air outlet duct to remove the ice on the blades.

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