A blade protection device for a wind turbine

Abstract

The present invention provides a blade protection device for a wind turbine, which relates to the technical field of wind turbine auxiliary devices and includes a front support assembly and a rear support assembly. The root of the blade is placed on the front support assembly, and the tip and middle part of the blade are placed on the rear support assembly. The front support assembly and the rear support assembly are fixed on the loading plane of the transport vehicle. One end of the root of the blade is arranged on the front support assembly, and the front support assembly fixes and supports this end of the root. The two rear support assemblies are respectively arranged at the tip and middle positions of the blade to support and limit the tip and middle parts of the blade. The front support assembly and the rear support assembly protect the blade simultaneously, preventing accidents such as blade abrasion and breakage during transportation, not only reducing the maintenance cost, but also ensuring the operation efficiency and safety of the wind turbine generator set.

Description

Technical Field

[0001] The present invention relates to the technical field of auxiliary devices for wind turbines, and particularly to a blade protection device for a wind turbine. Background Art

[0002] A wind turbine is a power device that converts wind energy into mechanical work. The mechanical work drives the rotor to rotate, and finally outputs alternating current. A wind turbine generally consists of components such as a wind wheel, blades, a generator, a yaw device, a tower, a speed-limiting safety mechanism, and an energy storage device.

[0003] The working principle of a wind turbine is relatively simple. The wind wheel rotates under the action of wind force. It converts the kinetic energy of the wind into the mechanical energy of the wind wheel shaft. The generator rotates to generate electricity driven by the wind wheel shaft. Broadly speaking, wind energy is also solar energy. Therefore, it can also be said that a wind turbine is a thermal energy utilization generator with the sun as the heat source and the atmosphere as the working medium.

[0004] With the rapid development of new wind power energy, the single-unit capacity of wind turbine generators is increasing day by day, and the length, width, and weight of the wind turbine blades are also increasing accordingly. During the transportation, storage, and on-site installation of the blades, if effective protection measures are lacking, accidents such as blade abrasion and breakage are extremely likely to occur, which not only increases the maintenance cost, but also seriously affects the operation efficiency and safety of the wind turbine generator set. Therefore, it is particularly important to design a blade protection device for a wind turbine with reasonable structure, simple operation, and remarkable protection effect. Summary of the Invention

[0005] The present invention provides a blade protection device for a wind turbine to solve the defects in the prior art.

[0006] The present invention provides a blade protection device for a wind turbine, including: a front support assembly and a rear support assembly. The root of the blade is placed on the front support assembly, and the tip and middle of the blade are placed on the rear support assembly.

[0007] Preferably, the front support assembly includes a fixed seat. At both ends of the top of the fixed seat, fixing plates are fixedly arranged. At the front and rear ends of the bottom of the fixing plates, first reinforcing frames are fixedly arranged. At the left and right ends of the bottom of the fixing plates, second reinforcing frames are fixedly arranged. Between the two fixing plates, a flange is fixedly arranged through a connecting plate. Multiple bolt holes with different radii are arranged on the flange. Horizontally and fixedly arranged on the upper parts of the two fixing plates are air cylinders respectively. The telescopic ends of the two air cylinders face the center of the fixing plates. A clamping ring is fixedly arranged at the telescopic end of the air cylinder. A rubber layer is arranged on the inner circle of the clamping ring. The inner side of the clamping ring is in contact with the flange.

[0008] Preferably, the rear support assembly includes a bearing seat, a bearing cavity is formed in the bearing seat, a plurality of hydraulic shock absorbers are fixedly arranged in the bearing cavity, a bearing plate is arranged at the top of the telescopic end of the hydraulic shock absorber, a support plate is fixedly arranged at the top of the bearing plate, a buffer spring is arranged between the bottom of the bearing plate and the hydraulic shock absorber, limiting strips are arranged at both ends of the bearing plate, a limiting groove is formed in the bearing cavity, and the limiting strips are clamped in the limiting groove.

[0009] Preferably, it further includes a movable clamping assembly, the movable clamping assembly is arranged at the top of the rear support assembly at the middle position of the blade, the movable clamping assembly includes a clamping frame, both ends of the bottom of the clamping frame are arranged at both ends of the support plate and are connected by horizontal bolts, a plurality of suction cups are arranged in the middle of the bottom of the clamping frame, the suction cups are attached to the top of the blade, a vacuum pump is arranged in the clamping frame, the vacuum pump is communicated with the suction cups, a positioning block is rotatably arranged at the top of the clamping frame, a motor is arranged in the positioning block, a rotating rod is vertically rotatably arranged at the bottom of the positioning block, the rotating rod is drivingly connected with the motor, the bottom of the rotating rod is fixedly connected with the clamping frame, and two hooks are fixedly arranged at the top of the positioning block.

[0010] Preferably, it further includes:

[0011] A speed measurement module one for measuring the crankshaft rotation speed value in the vacuum pump;

[0012] A speed measurement module two for measuring the air extraction rate of the vacuum pump;

[0013] A timing module for measuring the running time of the crankshaft in the vacuum pump;

[0014] A pressure measurement module one for measuring the actual intake pressure of the vacuum pump;

[0015] A pressure measurement module two for measuring the actual exhaust pressure of the vacuum pump;

[0016] A power detection module for measuring the real-time power value of the vacuum pump;

[0017] An alarm module for giving an alarm;

[0018] A calculation module one for calculating the theoretical maximum power value of the vacuum pump based on the crankshaft rotation speed in the vacuum pump;

[0019] A processing module for comparing and processing the result obtained by the calculation module one with the real-time power value of the vacuum pump;

[0020] The control module operates normally for the movement behavior of the blade when the real-time power value of the vacuum pump is less than or equal to the theoretical maximum power value of the vacuum pump. When the real-time power value of the vacuum pump is greater than the theoretical maximum power value of the vacuum pump, it controls the alarm module to issue an alarm, immediately lowers the blade slowly, and at the same time, personnel stay away from the blade movement range.

[0021] Preferably, calculation module one calculates based on the following formula one:

[0022]

[0023] W is the theoretical power consumption value of the vacuum pump, μ is the piston friction coefficient inside the vacuum pump, F is the piston tension inside the vacuum pump, N is the crankshaft rotation speed inside the vacuum pump, t is the crankshaft running time inside the vacuum pump, C is the adiabatic process constant inside the vacuum pump, P1 is the theoretical intake pressure of the vacuum pump, P2 is the theoretical exhaust pressure of the vacuum pump, P3 is the actual intake pressure of the vacuum pump, P4 is the actual exhaust pressure of the vacuum pump, and B is the pumping speed of the vacuum pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0025] Figure 1 is the overall structural schematic diagram provided by the embodiment of the present invention;

[0026] Figure 2 is the structural schematic diagram of the front support assembly provided by the embodiment of the present invention;

[0027] Figure 3 is the structural schematic diagram of the rear support assembly and the moving clamping assembly provided by the embodiment of the present invention.

[0028] Reference numerals:

[0029] 1. Blade; 2. Front support assembly; 21. Fixed seat; 22. Fixed plate; 23. Reinforcing frame one; 24. Reinforcing frame two; 25. Flange; 26. Bolt hole; 27. Air rod; 28. Rubber layer; 29. Snap ring; 3. Rear support assembly; 31. Bearing seat; 32. Bearing cavity; 33. Hydraulic shock absorber; 34. Bearing plate; 35. Support plate; 36. Buffer spring; 37. Limit strip; 38. Limit groove; 4. Moving clamping assembly; 41. Clamping frame; 42. Suction cup; 43. Vacuum pump; 44. Positioning block; 45. Motor; 46. Rotating rod; 47. Hook. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions in the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the present invention. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present invention without making creative efforts fall within the protection scope of the present invention.

[0031] In addition, in the present invention, descriptions such as "first" and "second" are only for descriptive purposes, and do not particularly refer to the meaning of order or sequence, nor are they used to limit the present invention. They are merely used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions and technical features between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present invention.

[0032] The present invention provides the following embodiments

[0033] Embodiment 1

[0034] An embodiment of the present invention provides a blade 1 protection device for a wind turbine 45, as Figures 1 - 3 shown, including: a front support assembly 2 and a rear support assembly 3. The root of the blade 1 is placed on the front support assembly 2, and the tip and middle of the blade 1 are placed on the rear support assembly 3.

[0035] The working principle and beneficial effects of the above technical solution are: fix the front support assembly 2 and the rear support assembly 3 on the load plane of the transport vehicle, set one end of the root of the blade 1 on the front support assembly 2, and the front support assembly 2 fixes and supports one end of the root. The two rear support assemblies 3 are respectively arranged at the tip and middle positions of the blade 1 to support and limit the tip and middle parts of the blade 1. The front support assembly 2 and the rear support assembly 3 protect the blade 1 at the same time, preventing accidents such as abrasion and breakage of the blade 1 during transportation, not only reducing the maintenance cost, but also ensuring the operation efficiency and safety of the wind turbine 45 group.

[0036] Embodiment 2

[0037] Based on Embodiment 1, as Figures 1 - 3As shown in the figure, the front support assembly 2 includes a fixed seat 21. At both ends of the top of the fixed seat 21, fixing plates 22 are fixedly arranged. At the front and rear ends of the bottom of the fixing plate 22, first reinforcing frames 23 are fixedly arranged. At the left and right ends of the bottom of the fixing plate 22, second reinforcing frames 24 are fixedly arranged. Between the two fixing plates 22, a flange 25 is fixedly arranged through a connecting plate. On the flange 25, a plurality of bolt holes 26 with different radii are arranged. On the upper parts of the two fixing plates 22, air rods 27 are horizontally and fixedly arranged respectively. The telescopic ends of the two air rods 27 are arranged towards the center of the fixing plate 22. At the telescopic ends of the air rods 27, snap rings 29 are fixedly arranged. Inside the inner ring of the snap ring 29, a rubber layer 28 is arranged. The inner side of the snap ring 29 is in contact with the flange 25.

[0038] The working principle and beneficial effects of the above technical solution are as follows: The fixed seat 21 is fixedly arranged on the loading plane of the transport vehicle. The fixed seat 21 supports the fixing plate 22. The first reinforcing frames 23 and the second reinforcing frames 24 are fixedly arranged in the front, rear, left, and right four directions of the fixing plate 22 to stably support the fixing plate 22. The two fixing plates 22 fix the connecting plate, and the connecting plate fixes the middle flange 25. The plurality of bolt holes 26 with different diameters arranged on the flange 25 respectively correspond to the screw holes on the blade roots of the blades 1 with different diameter sizes. The flange 25 and the blade root are fixedly connected by bolts. The two fixing plates 22 respectively horizontally fix and support the two air rods 27. The telescopic ends of the two air rods 27 fix the snap rings 29. The telescopic ends of the two air rods 27 drive the snap rings 29 to expand and contract, so as to control the distance between the two snap rings 29 to clamp the blade root part, further fixing the blade root, ensuring the stability of the blade root part during the transportation process. The rubber layer 28 plays a buffering role between the blade root and the snap ring 29, preventing the fastening force of the snap ring 29 from damaging the blade root.

[0039] Embodiment 3

[0040] On the basis of Embodiment 2, as Figures 1 - 3 shown, the rear support assembly 3 includes a bearing seat 31. Inside the bearing seat 31, a bearing cavity 32 is formed. Inside the bearing cavity 32, a plurality of hydraulic shock absorbers 33 are fixedly arranged. At the top of the telescopic ends of the hydraulic shock absorbers 33, a bearing plate 34 is arranged. At the top of the bearing plate 34, a support plate 35 is fixedly arranged. Between the bottom of the bearing plate 34 and the hydraulic shock absorbers 33, buffer springs 36 are arranged. At both ends of the bearing plate 34, limiting strips 37 are arranged. Inside the bearing cavity 32, limiting grooves 38 are formed. The limiting strips 37 are clamped in the limiting grooves 38.

[0041] The working principle and beneficial effects of the above technical solution are as follows: The bearing seat 31 is fixedly arranged on the load-carrying plane of the transport vehicle. The bottom of the bearing cavity 32 supports and positions a plurality of hydraulic shock absorbers 33. The telescopic ends of the plurality of hydraulic shock absorbers 33 buffer and carry the bearing plate 34. The bearing plate 34 supports the pallet 35. The buffer spring 36 further buffers the bearing plate 34. The bearing plate 34 fixes the limiting strip 37. The limiting strip 37 is slidably arranged in the limiting groove 38 to limit the bearing plate 34 vertically in the bearing cavity 32.

[0042] Embodiment 4

[0043] Based on Embodiment 3, as Figures 1 - 3 shown, it further includes a movable clamping assembly 4. The movable clamping assembly 4 is arranged on the top of the rear support assembly 3 at the midrib position of the blade 1. The movable clamping assembly 4 includes a clamping frame 41. The two ends of the bottom of the clamping frame 41 are arranged on the two ends of the pallet 35 and are connected by horizontal bolts. A plurality of suction cups 42 are arranged in the middle of the bottom of the clamping frame 41. The suction cups 42 are attached to the top of the blade 1. A vacuum pump 43 is arranged in the clamping frame 41. The vacuum pump 43 is communicated with the suction cups 42. A positioning block 44 is rotatably arranged at the top of the clamping frame 41. A motor 45 is arranged in the positioning block 44. A rotating rod 46 is vertically rotatably arranged at the bottom of the positioning block 44. The rotating rod 46 is drivingly connected to the motor 45. The bottom of the rotating rod 46 is fixedly connected to the clamping frame 41. Two hooks 47 are fixedly arranged at the top of the positioning block 44.

[0044] The working principle and beneficial effects of the above technical solution are as follows: The movable clamping assembly 4 is arranged on the top of the rear support assembly 3 at the midrib position of the blade 1. The pallet 35 supports the clamping frame 41. The pallet 35 and the clamping frame 41 stably fix the blade 1. The clamping frame 41 fixes and positions the internal vacuum pump 43. The suction cups 42 at the bottom of the clamping frame 41 are attached to the upper surface of the blade 1. The vacuum pump 43 controls the suction cups 42 to suck the blade 1 tightly, further fastening the blade 1 to the movable clamping assembly 4 and the rear support assembly 3, and further strengthening the stability of the blade 1. When the blade 1 is transported to the target position, the front support assembly 2 is separated from the blade root, and then the horizontal bolts fastening the clamping frame 41 and the pallet 35 are unscrewed. The lifting device hooks the two hooks 47 at the top of the positioning block 44, and uses the suction cups 42 to lift the blade 1 together, moves the blade 1 to the target position. At the same time, the motor 45 drives the rotating rod 46 to drive the clamping frame 41 to rotate, so as to adjust the angle of the blade 1.

[0045] Embodiment 5

[0046] Based on Embodiment 4, it further includes:

[0047] The first speed measurement module is used to measure the crankshaft rotation speed value in the vacuum pump 43;

[0048] The second speed measurement module is used to measure the air extraction rate of the vacuum pump 43;

[0049] The timing module is used to measure the crankshaft running time in the vacuum pump 43;

[0050] The first pressure measurement module is used to measure the actual intake pressure of the vacuum pump 43;

[0051] The second pressure measurement module is used to measure the actual exhaust pressure of the vacuum pump 43;

[0052] The power detection module is used to measure the real-time power value of the vacuum pump 43;

[0053] The alarm module is used to give an alarm;

[0054] The first calculation module is used to calculate the theoretical maximum power value of the vacuum pump 43 based on the crankshaft rotation speed in the vacuum pump 43;

[0055] The processing module is used to compare and process the result obtained by the first calculation module with the real-time power value of the vacuum pump 43;

[0056] The control module, when the real-time power value of the vacuum pump 43 is less than or equal to the theoretical maximum power value of the vacuum pump 43, the movement behavior of the blade 1 works normally. When the real-time power value of the vacuum pump 43 is greater than the theoretical maximum power value of the vacuum pump 43, it controls the alarm module to give an alarm, and immediately and slowly lowers the blade 1, and at the same time, the personnel stay away from the movement range of the blade 1.

[0057] The working principle and beneficial effects of the above technical solution are as follows: The first speed measurement module measures the crankshaft rotation speed value in the vacuum pump 43, the second speed measurement module measures the air extraction rate of the vacuum pump 43, the timing module measures the crankshaft running time in the vacuum pump 43, the first pressure measurement module measures the actual intake pressure of the vacuum pump 43, the second pressure measurement module measures the actual exhaust pressure of the vacuum pump 43, the power detection module measures the real-time power value of the vacuum pump 43, the alarm module is used to give an alarm, the first calculation module calculates the theoretical maximum power value of the vacuum pump 43 based on the crankshaft rotation speed in the vacuum pump 43, the processing module is used to compare and process the result obtained by the first calculation module with the real-time power value of the vacuum pump 43. When the real-time power value of the vacuum pump 43 is less than or equal to the theoretical maximum power value of the vacuum pump 43, the movement behavior of the blade 1 works normally. When the real-time power value of the vacuum pump 43 is greater than the theoretical maximum power value of the vacuum pump 43, the control module controls the alarm module to give an alarm, and controls the lifting device to immediately and slowly lower the blade 1, and at the same time, the personnel stay away from the movement range of the blade 1.

[0058] Embodiment 6

[0059] On the basis of Embodiment 5, Calculation Module 1 calculates based on the following Formula 1:

[0060]

[0061] W is the theoretical power consumption value of the vacuum pump 43, μ is the piston friction coefficient inside the vacuum pump 43, F is the piston tension inside the vacuum pump 43, N is the crankshaft rotation speed inside the vacuum pump 43, t is the crankshaft operation time inside the vacuum pump 43, C is the adiabatic process constant inside the vacuum pump 43, P1 is the theoretical intake pressure of the vacuum pump 43, P2 is the theoretical exhaust pressure of the vacuum pump 43, P3 is the actual intake pressure of the vacuum pump 43, P4 is the actual exhaust pressure of the vacuum pump 43, and B is the pumping speed of the vacuum pump 43.

[0062] The working principle and beneficial effects of the above technical solution are: By calculating the theoretical power consumption value of the vacuum pump 43, when the real-time power value of the vacuum pump 43 is less than or equal to the theoretical maximum power value of the vacuum pump 43, the movement behavior of the blade 1 works normally. When the real-time power value of the vacuum pump 43 is greater than the theoretical maximum power value of the vacuum pump 43, the control module controls the alarm module to issue an alarm, and controls the lifting device to slowly lower the blade 1 immediately, while the personnel stay away from the movement range of the blade 1.

[0063] Finally, it should be noted that: The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them; Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: They can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; And these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A blade protection device for a wind turbine, characterized in that: include: A front support assembly (2) and a rear support assembly (3), wherein the root of the blade (1) is placed on the front support assembly (2), and the tip and the middle of the blade (1) are placed on the rear support assembly (3); The rear support assembly (3) comprises a bearing seat (31), a bearing cavity (32) is provided in the bearing seat (31), a plurality of hydraulic shock absorbers (33) are fixedly arranged in the bearing cavity (32), a bearing plate (34) is provided at the top of the telescopic end of the hydraulic shock absorber (33), and a support plate (35) is fixedly arranged at the top of the bearing plate (34); It also includes a movable clamping assembly (4), the movable clamping assembly (4) being arranged at the top of the rear support assembly (3) at the middle position of the blade (1), the movable clamping assembly (4) comprising a clamping frame (41), the two ends of the bottom of the clamping frame (41) being arranged on the two ends of the support plate (35) and connected by horizontal bolts, a plurality of suction cups (42) being arranged in the middle of the bottom of the clamping frame (41), the suction cups (42) being in contact with the top of the blade (1), a vacuum pump (43) being arranged in the clamping frame (41), and the vacuum pump (43) being in communication with the suction cups (42); Also includes: Speed ​​measurement module 1, used to measure the crankshaft speed value in the vacuum pump (43); Speed ​​measurement module 2, used to measure the pumping speed of the vacuum pump (43); A timing module for measuring the crankshaft running time in the vacuum pump (43); A pressure measuring module 1, used to measure the actual intake pressure of the vacuum pump (43); A second pressure measuring module, used for measuring the actual exhaust pressure of the vacuum pump (43); A power detection module, used to measure the real-time power value of the vacuum pump (43); An alarm module, used for issuing an alarm; A calculation module 1, used to calculate a theoretical maximum power value of the vacuum pump (43) based on a crankshaft speed in the vacuum pump (43); A processing module, used for comparing the result obtained by the calculation module 1 with the real-time power value of the vacuum pump (43); The control module is configured to control the movement of the blade (1) to work normally when the real-time power value of the vacuum pump (43) is less than or equal to the theoretical maximum power value of the vacuum pump (43); and to control the alarm module to sound an alarm and immediately and slowly lower the blade (1), while keeping personnel away from the movement range of the blade (1) when the real-time power value of the vacuum pump (43) is greater than the theoretical maximum power value of the vacuum pump (43).

2. A blade protection device for a wind turbine according to claim 1, characterized in that: The front support assembly (2) comprises a fixing seat (21), a fixing plate (22) is fixedly provided at both ends of the top of the fixing seat (21), a reinforcing frame 1 (23) is fixedly provided at both ends of the front and rear of the bottom of the fixing plate (22), a reinforcing frame 2 (24) is fixedly provided at both ends of the left and right of the bottom of the fixing plate (22), a flange (25) is fixedly provided between the two fixing plates (22) via a connecting plate, a plurality of bolt holes (26) of different radii are provided on the flange (25), gas rods (27) are fixedly provided horizontally at the upper parts of the two fixing plates (22), the telescopic ends of the two gas rods (27) are arranged toward the center of the fixing plate (22), a clamping ring (29) is fixedly provided at the telescopic end of the gas rod (27), a rubber layer (28) is provided on the inner ring of the clamping ring (29), and the inner side of the clamping ring (29) is in contact with the flange (25).

3. The blade protection device of a wind turbine according to claim 1, characterized in that: A buffer spring (36) is provided between the bottom of the bearing plate (34) and the hydraulic shock absorber (33), limiting strips (37) are provided at both ends of the bearing plate (34), a limiting groove (38) is provided in the bearing cavity (32), and the limiting strip (37) is clamped in the limiting groove (38).

4. A blade protection device for a wind turbine according to claim 3, characterized in that: A positioning block (44) is rotatably provided at the top of the clamping frame (41), a motor (45) is provided inside the positioning block (44), a rotating rod (46) is vertically rotatably provided at the bottom of the positioning block (44), the rotating rod (46) is drivingly connected to the motor (45), the bottom of the rotating rod (46) is fixedly connected to the clamping frame (41), and two hooks (47) are fixedly provided at the top of the positioning block (44).

5. A blade protection device for a wind turbine according to claim 4, characterized in that: The calculation module 1 calculates based on the following formula 1: ； is the theoretical maximum power value of the vacuum pump (43), is the friction coefficient of the piston in the vacuum pump (43), is the piston tension in the vacuum pump (43), is the crankshaft speed in the vacuum pump (43), is the crankshaft running time in the vacuum pump (43), is the adiabatic process constant in the vacuum pump (43), is the theoretical intake pressure of the vacuum pump (43), is the theoretical exhaust pressure of the vacuum pump (43), is the actual intake pressure of the vacuum pump (43), is the actual exhaust pressure of the vacuum pump (43), is the pumping rate of the vacuum pump (43).

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