Blade protection device of wind driven generator

Abstract

The invention provides a blade protection device of a wind driven generator, and relates to the technical field of wind driven generator auxiliary devices, the blade protection device comprises a front supporting assembly and a rear supporting assembly, the blade root of a blade is placed on the front supporting assembly, and the blade tip and the blade middle of the blade are placed on the rear supporting assembly; the front supporting assembly and the rear supporting assemblies are fixed to a carrying plane of a transportation carrier, one end of a blade root of a blade is arranged on the front supporting assembly, the front supporting assembly fixedly supports the end of the blade root, the two rear supporting assemblies are arranged at the blade tip and the blade middle of the blade correspondingly, and the blade tip and the blade middle of the blade are supported and limited. The front supporting assembly and the rear supporting assembly protect the blades at the same time, accidents such as blade scratching and breaking in the transportation process are prevented, the maintenance cost is reduced, and the operation efficiency and safety of the wind generating set are guaranteed.

Description

Technical Field

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

[0002] A wind turbine is an electric device that converts wind energy into mechanical work, which drives the rotor to rotate and finally outputs alternating current. A wind turbine generally consists of a wind wheel, blades, a generator, a rectifier, a tower, a speed limit safety mechanism, and an energy storage device.

[0003] The working principle of a wind turbine is relatively simple. The wind rotor rotates under the action of wind, which converts the kinetic energy of the wind into mechanical energy of the wind rotor shaft. The generator rotates and generates electricity under the drive of the wind rotor shaft. In a broad sense, wind energy is also solar energy, so it can also be said that a wind turbine is a heat energy generator that uses the sun as a heat source and the atmosphere as a working medium.

[0004] With the rapid development of wind power, the capacity of wind turbines is increasing day by day, and the length, width and weight of wind turbine blades are also increasing. In the process of transportation, storage and on-site installation of blades, if there is a lack of effective protection measures, blade scratches, breakage and other accidents are very likely to occur, which not only increases the maintenance cost, but also seriously affects the operating efficiency and safety of wind turbines. Therefore, it is particularly important to design a wind turbine blade protection device with reasonable structure, simple operation and significant protection effect. Summary of the invention

[0005] The invention provides a blade protection device for a wind turbine generator, which is used to solve the defects in the prior art.

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

[0007] Preferably, the front support assembly includes a fixed seat, fixing plates are fixedly provided at both ends of the top of the fixing seat, reinforcing frame 1 is fixedly provided at the front and rear ends of the bottom of the fixing plate, reinforcing frame 2 is fixedly provided at the left and right ends of the bottom of the fixing plate, a flange is fixedly provided between the two fixing plates via a connecting plate, a plurality of bolt holes with different radii are provided on the flange, gas rods are horizontally fixedly provided at the upper parts of the two fixing plates, the telescopic ends of the two gas rods are arranged toward the center of the fixing plates, a clamp ring is fixedly provided at the telescopic end of the gas rod, a rubber layer is provided on the inner ring of the clamp ring, and the inner side of the clamp ring is in contact with the flange.

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

[0009] Preferably, it also includes a movable clamping assembly, which is arranged at the top of the rear support assembly at the middle position of the blade, and the movable clamping assembly includes a clamping frame, the two ends of the bottom of the clamping frame are arranged on the two 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 in contact with the top of the blade, a vacuum pump is arranged in the clamping frame, and the vacuum pump is connected to the suction cups, a positioning block is rotatably arranged on the top of the clamping frame, a motor is arranged in the positioning block, and a rotating rod is vertically rotatably arranged on the bottom of the positioning block, the rotating rod is drive-connected to the motor, the bottom of the rotating rod is fixedly connected to the clamping frame, and two hooks are fixedly arranged on the top of the positioning block.

[0010] Preferably, it also includes:

[0011] Speed ​​measurement module 1, used to measure the crankshaft speed value in the vacuum pump;

[0012] Speed ​​measurement module 2, used to measure the pumping rate of the vacuum pump;

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

[0014] Pressure measurement module 1, used to measure the actual intake pressure of the vacuum pump;

[0015] Pressure measurement module 2, used to measure the actual exhaust pressure of the vacuum pump;

[0016] A power detection module is used to measure the real-time power value of the vacuum pump;

[0017] An alarm module, used for issuing an alarm;

[0018] A calculation module 1 is used to calculate a theoretical maximum power value of the vacuum pump based on a crankshaft speed in the vacuum pump;

[0019] A processing module, used for comparing the result obtained by the calculation module 1 with the real-time power value of the vacuum pump;

[0020] Control module, 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, the movement of the blade works normally. When the real-time power value of the vacuum pump is greater than the theoretical maximum power value of the vacuum pump, the control alarm module sounds an alarm and immediately and slowly lowers the blade, while personnel stay away from the movement range of the blade.

[0021] Preferably, the calculation module 1 calculates based on the following formula 1:

[0022]

[0023] W is the theoretical power consumption of the vacuum pump, μ is the friction coefficient of the piston in the vacuum pump, F is the piston tension in the vacuum pump, N is the crankshaft speed in the vacuum pump, t is the crankshaft running time in the vacuum pump, C is the adiabatic process constant in 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 vacuum pumping rate 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 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.

[0025] Figure 1 It is a schematic diagram of the overall structure provided by an embodiment of the present invention;

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

[0027] Figure 3 It is a schematic structural diagram of a rear support assembly and a movable clamping assembly provided in an embodiment of the present invention.

[0028] Reference numerals:

[0029] 1. Blade; 2. Front support assembly; 21. Fixed seat; 22. Fixed plate; 23. Reinforcement frame 1; 24. Reinforcement frame 2; 25. Flange; 26. Bolt hole; 27. Gas rod; 28. Rubber layer; 29. ​​Clamp; 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. Mobile clamping assembly; 41. Clamping frame; 42. Suction cup; 43. Vacuum pump; 44. Positioning block; 45. Motor; 46. Rotating rod; 47. Hook. DETAILED DESCRIPTION

[0030] 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.

[0031] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present invention. They are only 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 number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions and technical features between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0032] The present invention provides the following embodiments

[0033] Example 1

[0034] The embodiment of the present invention provides a blade 1 protection device for a wind turbine 45, such as Figure 1-Figure 3 As shown, it includes: 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 the 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 as follows: the front support assembly 2 and the rear support assembly 3 are fixed on the loading plane of the transport vehicle, the root end of the blade 1 is set on the front support assembly 2, and the front support assembly 2 fixes and supports the root end of the blade. The two rear support assemblies 3 are respectively set 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 to prevent accidents such as abrasions and breakages of the blade 1 during transportation, which not only reduces the maintenance cost, but also ensures the operating efficiency and safety of the wind turbine 45 group.

[0036] Example 2

[0037] On the basis of Example 1, Figure 1-Figure 3As shown, the front support assembly 2 includes a fixed seat 21, fixed plates 22 are fixedly provided at both ends of the top of the fixed seat 21, reinforcing frames 23 are fixedly provided at the front and rear ends of the bottom of the fixed plate 22, and reinforcing frames 24 are fixedly provided at the left and right ends of the bottom of the fixed plate 22. A flange 25 is fixedly provided between the two fixed plates 22 through a connecting plate, and a plurality of bolt holes 26 with different radii are provided on the flange 25. Gas rods 27 are horizontally fixedly provided at the upper parts of the two fixed plates 22, and the telescopic ends of the two gas rods 27 are arranged toward the center of the fixed plate 22. A clamping ring 29 is fixedly provided at the telescopic end of the gas rod 27, and 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.

[0038] The working principle and beneficial effects of the above technical solution are as follows: the fixing seat 21 is fixedly arranged on the loading plane of the transport vehicle, the fixing seat 21 supports the fixing plate 22, the reinforcing frame 1 23 and the reinforcing frame 24 are fixedly arranged in the front, back, left and right directions of the fixing plate 22 to stably support the fixing plate 22, the two fixing plates 22 fix the connecting plate, the connecting plate fixes the middle flange 25, and the multiple bolt holes 26 of different diameters arranged on the flange 25 correspond to the screw holes on the blade roots of the blades 1 of different diameters. The flange 25 is fixedly connected to the blade root by bolts, and the two fixing plates 22 respectively support the two gas rods 27 horizontally. The telescopic ends of the two gas rods 27 fix the clamping ring 29. The telescopic ends of the two gas rods 27 drive the clamping ring 29 to expand and contract, thereby controlling the distance between the two clamping rings 29 to clamp the blade root part, further fixing the blade root, and ensuring the stability of the blade root part during transportation. The rubber layer 28 acts as a buffer between the blade root and the clamping ring 29 to prevent the tightening force of the clamping ring 29 from causing damage to the blade root.

[0039] Example 3

[0040] On the basis of Example 2, Figure 1-Figure 3 As shown, the rear support assembly 3 includes a bearing seat 31, a bearing cavity 32 is opened 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 arranged on the top of the telescopic end of the hydraulic shock absorber 33, a support plate 35 is fixedly arranged on the top of the bearing plate 34, a buffer spring 36 is arranged between the bottom of the bearing plate 34 and the hydraulic shock absorber 33, limiting strips 37 are arranged at both ends of the bearing plate 34, a limiting groove 38 is opened in the bearing cavity 32, and the limiting strip 37 is clamped in the limiting groove 38.

[0041] The working principle and beneficial effects of the above technical scheme are as follows: the bearing seat 31 is fixedly arranged on the loading plane of the transport vehicle, the bottom of the bearing cavity 32 supports and limits the multiple hydraulic shock absorbers 33, the telescopic ends of the multiple hydraulic shock absorbers 33 buffer and support the bearing plate 34, the bearing plate 34 supports the support plate 35, the buffer spring 36 further buffers the bearing plate 34, the bearing plate 34 fixes the limit bar 37, the limit bar 37 is slidably arranged in the limit groove 38, and the bearing plate 34 is limited in the vertical direction in the bearing cavity 32.

[0042] Example 4

[0043] On the basis of Example 3, Figure 1-Figure 3 As shown, it also includes a movable clamping assembly 4, which is arranged at the top of the rear support assembly 3 at the middle position of the blade 1, and the movable clamping assembly 4 includes a clamping frame 41, and the two ends of the bottom of the clamping frame 41 are arranged on the two ends of the support plate 35 and are connected by horizontal bolts, and a plurality of suction cups 42 are arranged in the middle of the bottom of the clamping frame 41, and the suction cups 42 are in contact with the top of the blade 1, and a vacuum pump 43 is arranged in the clamping frame 41, and the vacuum pump 43 is connected to the suction cups 42, and a positioning block 44 is rotatably arranged on the top of the clamping frame 41, and a motor 45 is arranged in the positioning block 44, and a rotating rod 46 is vertically rotatably arranged at the bottom of the positioning block 44, and the rotating rod 46 is driven and connected to the motor 45, and the bottom of the rotating rod 46 is fixedly connected to the clamping frame 41, and two hooks 47 are fixedly arranged on the top of the positioning block 44.

[0044] The working principle and beneficial effects of the above technical scheme are as follows: the mobile clamping assembly 4 is arranged on the top of the rear supporting assembly 3 at the middle position of the blade 1, the support plate 35 supports the clamping frame 41, the support plate 35 and the clamping frame 41 stably fix the blade 1, the clamping frame 41 fixes and limits the internal vacuum pump 43, the suction cup 42 at the bottom of the clamping frame 41 fits with the upper surface of the blade 1, the vacuum pump 43 controls the suction cup 42 to suck the blade 1 tightly, and further fastens the blade 1 to the mobile clamping assembly 4 and the rear supporting assembly 3, and further enhances the stability of the blade 1. When the blade 1 is transported to the target position, the front supporting assembly 2 is separated from the blade root, and then the horizontal bolts fastening the clamping frame 41 and the support plate 35 are screwed out, the lifting device hooks the two hooks 47 on the top of the positioning block 44, and uses the suction cup 42 to lift the blade 1 together, and move 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, thereby adjusting the angle of the blade 1.

[0045] Example 5

[0046] On the basis of Example 4, it also includes:

[0047] Speed ​​measurement module 1, used to measure the crankshaft speed value in the vacuum pump 43;

[0048] Speed ​​measurement module 2, used to measure the pumping speed of the vacuum pump 43;

[0049] A timing module for measuring the crankshaft running time in the vacuum pump 43;

[0050] A pressure measurement module 1, used to measure the actual intake pressure of the vacuum pump 43;

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

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

[0053] An alarm module, used for issuing an alarm;

[0054] A calculation module 1, used to calculate a theoretical maximum power value of the vacuum pump 43 based on the crankshaft speed in the vacuum pump 43;

[0055] 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;

[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 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 alarm module sounds an alarm and immediately and slowly lowers the blade 1, while the personnel stay away from the moving range of the blade 1.

[0057] The working principle and beneficial effects of the above technical solution are as follows: the speed measurement module 1 measures the crankshaft speed value in the vacuum pump 43, the speed measurement module 2 measures the exhaust rate of the vacuum pump 43, the timing module measures the crankshaft running time in the vacuum pump 43, the pressure measurement module 1 measures the actual intake pressure of the vacuum pump 43, the pressure measurement module 2 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 issue an alarm, the calculation module 1 calculates the theoretical maximum power value of the vacuum pump 43 based on the crankshaft speed in the vacuum pump 43, and the processing module is used to compare and process the result obtained by the calculation module 1 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 issue an alarm, and controls the lifting device to slowly lower the blade 1 immediately, and the personnel stay away from the moving range of the blade 1.

[0058] Example 6

[0059] Based on Example 5, the calculation module 1 calculates based on the following formula 1:

[0060]

[0061] W is the theoretical power consumption of the vacuum pump 43, μ is the friction coefficient of the piston in the vacuum pump 43, F is the piston tension in the vacuum pump 43, N is the crankshaft speed in the vacuum pump 43, t is the crankshaft running time in the vacuum pump 43, C is the adiabatic process constant in 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 rate of the vacuum pump 43.

[0062] The working principle and beneficial effects of the above technical solution are: The theoretical power consumption of the vacuum pump 43 is calculated. 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 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 sound an alarm, and controls the lifting device to immediately and slowly lower the blade 1, while the personnel stay away from the moving 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, 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 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).

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 the front and rear ends of the bottom of the fixing plate (22), a reinforcing frame 2 (24) is fixedly provided at the left and right ends 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: 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), a supporting plate (35) is fixedly arranged at the top of the bearing plate (34), 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: The invention also comprises a movable clamping assembly (4), wherein the movable clamping assembly (4) is arranged at the top of the rear support assembly (3) at the middle position of the blade (1), and the movable clamping assembly (4) comprises a clamping frame (41), wherein the two ends of the bottom of the clamping frame (41) are arranged on the two ends of the support plate (35) and are connected by horizontal bolts, and a plurality of suction cups (42) are arranged in the middle of the bottom of the clamping frame (41), and the suction cups (42) are in contact with the top of the blade (1), and a vacuum is arranged in the clamping frame (41). A pump (43), the vacuum pump (43) is connected to the suction cup (42), a positioning block (44) is rotatably provided at the top of the clamping frame (41), a motor (45) is provided in 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 drive-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: Also includes: Speed ​​measurement module 1, used to measure the crankshaft speed value in the vacuum pump (43); A speed measurement module 2, used for measuring 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 for measuring the real-time power value of the vacuum pump (43); An alarm module, used for issuing an alarm; A calculation module 1, used for calculating 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, 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 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 alarm module sounds an alarm and immediately and slowly lowers the blade (1), while the personnel stay away from the movement range of the blade (1).

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

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