CN112922794B - Blade replacing device and method of wind driven generator - Google Patents
Blade replacing device and method of wind driven generator Download PDFInfo
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- CN112922794B CN112922794B CN201911235800.0A CN201911235800A CN112922794B CN 112922794 B CN112922794 B CN 112922794B CN 201911235800 A CN201911235800 A CN 201911235800A CN 112922794 B CN112922794 B CN 112922794B
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- overhauling
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D80/00—Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
- F03D80/50—Maintenance or repair
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D13/00—Assembly, mounting or commissioning of wind motors; Arrangements specially adapted for transporting wind motor components
- F03D13/10—Assembly of wind motors; Arrangements for erecting wind motors
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
Abstract
A blade replacing device and method of a wind driven generator comprises a blade overhauling and maintaining platform and a blade clamp; the fixed support is connected with a supporting screw rod; the blade clamp comprises a mounting frame and a holding piece, a pressing plate is arranged on the inner side of the mounting frame, an anti-skidding liner is arranged on the surface of the pressing plate, a pressing tongue is movably connected inside the mounting frame through a rotating shaft, one end of the pressing tongue is in contact with the pressing plate, the other end of the pressing tongue is connected with an anchor chain, and the anchor chain penetrates through a chain guide cylinder and is fixedly connected with a hanging ring; when the blade bolt is used, the two fixing rings are firstly locked at the root positions of the blades, then the two lifting rings are connected with a winch on the ground after respectively penetrating through the two fixed pulleys through the two steel wire ropes, when the blade bolt is replaced, the winch is started, a lifting acting force is applied to the fixing rings of the two blade clamps through the steel wire ropes to offset the dead weight of the blades, the bolt of the blade to be replaced is removed, and the winch is operated to slowly release the steel wire ropes, so that the blades can be conveyed to the ground; the blade replacing method is convenient and quick, and large-scale hoisting equipment is not required to be configured.
Description
Technical Field
The invention relates to the technical field of blade replacement of wind driven generators, in particular to a blade replacement device and method of a wind driven generator.
Background
Generally, a wind turbine generator system is composed of a tower, a nacelle, and an impeller and is installed in the field or at sea. The conventional impeller generally comprises three blades and a hub, and the diameter of the impeller is generally more than 50 meters, so that the impeller has large size and weight. The blade is one of the key parts of the wind turbine generator, the manufacturing cost of the blade accounts for about 15-20% of the manufacturing cost of the whole wind turbine generator, meanwhile, the whole blade is exposed outside, the working condition is severe, and the blade is also one of the parts which are most easily damaged in the wind turbine generator.
At present, a large crane is usually adopted to directly detach the whole impeller from a high-altitude tower frame for blade replacement, then the impeller is placed on the ground for blade replacement, and then the whole impeller is installed on the high-altitude tower frame; although the blade can be replaced by the blade replacing method, in practical application, the whole impeller is disassembled, so that a large crane with a long suspension arm and high load capacity is required, the requirement on the site for blade replacement is high, the cost for blade replacement is increased by the factors, and the time for blade replacement is long, so that the replacement efficiency is low.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a blade replacing device and a blade replacing method of a wind driven generator, which overcome the defects of the prior art, have reasonable design, apply a lifting acting force on the fixing rings of two blade clamps through an anchor chain, release a steel wire rope through a ground winch, convey the blades to the ground, and carry out opposite steps when installing the blades, are convenient and quick, and do not need to be provided with large-scale equipment such as a maintenance crane and the like.
In order to achieve the purpose, the invention is realized by the following technical scheme:
a blade replacing device of a wind driven generator comprises a blade overhauling and maintaining platform and a blade clamp, wherein the blade overhauling and maintaining platform is of a U-shaped structure with one open side, the open side of the blade overhauling and maintaining platform is movably connected with a sliding platform, and a lifter is fixedly arranged at the four corners of the blade overhauling and maintaining platform; a supporting plate is arranged in the middle of the upper surface of the blade overhauling and maintaining platform, two fixing supports are fixedly arranged on two sides of the upper surface of the supporting plate, a supporting lead screw is movably connected onto each fixing support, an equipment support is arranged between the two supporting lead screws on each side of the upper surface of the supporting plate, threaded holes are formed in two ends of each equipment support, and the supporting lead screws are in threaded connection with the equipment supports through the threaded holes; the blade clamp comprises two fixing rings, an annular structure is formed by enclosing the two fixing rings, the fixing rings are locked and fixed through locking bolts and comprise a mounting frame and a holding piece, two side surfaces of the mounting frame are fixedly provided with one end of the holding piece through bolts, the other end of the holding piece is locked and fixed with the holding piece corresponding to the other fixing ring through the locking bolts, a pressing plate is arranged on the inner side of the mounting frame, a pressing tongue is movably connected inside the mounting frame through a rotating shaft, one end of the pressing tongue is in contact with the pressing plate on the inner side of the mounting frame, and an anti-skidding liner is arranged on the surface of the pressing plate; the other end fixedly connected with one end of anchor chain of spatula, the other end of anchor chain passes through chain guide tube fixedly connected with rings, mounting bracket fixed mounting is in the middle of the upper surface of equipment support.
Preferably, two ends of each of the two fixing rings of the blade clamp are fixedly provided with a lock pin, each lock pin is provided with a through hole, and each lock bolt penetrates through the corresponding through hole of the two fixing rings and is connected with a lock nut in a threaded manner; a fixing support is arranged below the lock pin, and two ends of the fixing support are fixedly arranged on the upper surface of the supporting plate.
Preferably, the blade anchor clamps hold tightly the piece and be provided with two sets ofly, and respectively fixed mounting in the top and the below of mounting bracket both sides face, the inside surface cladding of holding tightly the piece has flexible material.
Preferably, the both sides fixed mounting of blade maintenance platform's open end has the slide, surface mounting has the pulley on the slide, sliding platform divide into left and right two, and both sides surface below all is provided with the slide rail, pulley swing joint is inside the slide rail.
Preferably, one side of the blade overhauling and maintaining platform far away from the sliding platform is fixedly provided with one end of a telescopic frame, and the other end of the telescopic frame is provided with a roller.
The invention also discloses a blade replacing method of the wind driven generator, which comprises the following steps:
1) keeping the blades needing to be replaced in a vertical downward posture, respectively tying a hanging strip or a clamp at the root parts of the other two blades of the wind driven generator, and installing a fixed pulley on the hanging strip or the clamp;
2) lifting the blade changing device of any one of claims 1 to 5 to the blade root by a hoist;
3) installing a blade clamp at the root position of the blade by using a blade maintenance platform, and locking and fixing the blade clamp through a locking bolt;
4) a steel wire rope of the ground winch passes through the other two blade hanging belts or the fixed pulleys on the clamp, then is connected with the hanging rings on the blade clamp, and the ground winch is started to ensure that the pulling force is not less than the self weight of the blades;
5) the ground small crane is connected to the blade tip part of the blade to be replaced for traction;
6) a constructor removes a blade bolt inside the fan hub;
7) operating the winch to enable the blades to descend at a constant speed; the small-sized crane on the ground is operated to always pull the blade tip part of the blade so as to prevent the blade tip part from colliding with the tower drum of the fan;
8) when the blade tip approaches the ground, the blade tip part is lifted by a small ground crane, and meanwhile, the blade root part continues to descend at a constant speed until the integral attitude of the blade becomes horizontal;
9) operating a small crane and a winch on the ground, slightly putting the blade on a prepared blade bracket, detaching a blade clamp, and then installing the blade clamp on the root of a new blade;
10) starting a winch to hoist the root of the new blade, and simultaneously hoisting the ground small crane from the blade tip side by using the tool to start to install the new blade;
11) installing a connecting bolt of the new blade after the new blade is installed into the hub; lifting the blade maintenance platform to the root of the blade, standing the constructor on the blade maintenance platform to disassemble the blade clamp, disassembling the slings or the clamp and the fixed pulley on the roots of the other two blades, and operating the blade maintenance platform to land on the ground by the constructor after the operation is finished.
Preferably, in step 1), the low-speed rotor lock is started to fix the wind turbine rotor when the blade to be replaced is turned to the vertical downward position.
The invention provides a blade replacing device and method of a wind driven generator. The method has the following beneficial effects: the threaded connection relation of the threaded holes in the two ends of the support screw rod and the threaded connection relation of the threaded holes in the two ends of the equipment support on the blade overhauling and maintaining platform are utilized, so that the equipment support can be adjusted in the position of the vertical direction of the support screw rod, then, the included angle between the blade clamp and the horizontal plane is adjusted, the angle of inclination of the blade clamp is guaranteed to be the same as the angle of inclination of the blade, and when the two fixing rings are locked and fastened through the locking bolts, the blade surface needing to be replaced can be tightly embraced by the clasping piece.
And the anchor chain has a lifting acting force to the two fixed rings, the steel wire rope is released by the winch, the blade is conveyed to the ground, when the blade is installed, the opposite steps are carried out, the operation is convenient and fast, large-scale machines such as a maintenance crane and the like are not needed to be configured, and when the blade is conveyed, because one end of the pressing tongue is connected with the anchor chain which receives the pulling force, the other end of the pressing tongue can generate an extrusion force towards the blade direction to the pressing plate on the inner side of the blade clamp installation frame through the lever principle, and the larger the gravity of the blade is, the larger the extrusion force of the pressing tongue to the pressing plate is, so that the blade can be locked and fixed more stably when being conveyed.
Drawings
In order to more clearly illustrate the present invention or the prior art solutions, the drawings that are needed in the description of the prior art will be briefly described below.
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the upper surface of the pallet of the present invention;
FIG. 3 is a schematic view of the construction of the mount of the present invention;
the reference numbers in the figures illustrate:
1. a blade maintenance platform; 2. a support plate; 3. a sliding platform; 4. a hoist; 5. fixing the support; 6. a support screw rod; 7. an equipment support; 8. a fixing ring; 9. locking the bolt; 10. a mounting frame; 11. a holding sheet; 12. pressing a plate; 13. a rotating shaft; 14. tongue depressing; 15. an anchor chain; 16. a hoisting ring; 17. a lock pin; 18. fixing a bracket; 19. a slide base; 20. a pulley; 21. a slide rail; 22. a telescopic frame; 23. a roller; 24. an anti-slip liner; 25. and a chain guide cylinder.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings.
In the first embodiment, as shown in fig. 1 to 3, a blade replacing device of a wind driven generator comprises a blade overhauling and maintaining platform 1 and a blade clamp, wherein the blade overhauling and maintaining platform 1 is of a U-shaped structure with an opening at one side, a sliding platform 3 is movably connected to the opening side of the blade overhauling and maintaining platform 1, and a lifter 4 is fixedly installed at the four corners of the blade overhauling and maintaining platform 1; the middle of the upper surface of the blade overhauling and maintaining platform 1 is provided with a supporting plate 2, two sides of the upper surface of the supporting plate 2 are fixedly provided with two fixing supports 5, the fixing supports 5 are movably connected with supporting screw rods 6, an equipment bracket 7 is arranged between the two supporting screw rods 6 on each side of the upper surface of the supporting plate 2, two ends of the equipment bracket 7 are provided with threaded holes, and the supporting screw rods 6 are in threaded connection with the equipment bracket 7 through the threaded holes; the blade clamp comprises two fixing rings 8, an annular structure is enclosed between the two fixing rings 8, the two fixing rings 8 are locked and fixed through a locking bolt 9, each fixing ring 8 comprises a mounting frame 10 and a holding piece 11, two side surfaces of the mounting frame 10 are respectively provided with one end of each holding piece 11 through bolts, the other end of each holding piece 11 is locked and fixed with the holding piece 11 corresponding to the other fixing ring 8 through the locking bolt 9, a pressing plate 12 is arranged on the inner side of the mounting frame 10, an anti-skidding liner 24 is arranged on the surface of each pressing plate 12, a pressing tongue 14 is movably connected inside the mounting frame 10 through a rotating shaft 13, one end of each pressing tongue 14 is in contact with the pressing plate 12 on the inner side of the mounting frame, the anti-skidding liner 24 on the surface of each pressing plate 12 is used for protecting the surface of a blade from being damaged, one end of an anchor chain 15 is fixedly connected to the other end of each pressing tongue 14, and a hanging ring 16 is fixedly connected to the other end of the anchor chain 15 through a chain guide cylinder 25, the mounting frame 10 is fixedly mounted in the middle of the upper surface of the equipment support 7.
Before working, one end of a flat sling can be fixedly connected in a cabin, the other end of the flat sling is connected with a steel wire rope, the other end of the steel wire rope is hung down and installed in a lifter 4, the lifter 4 drives a blade replacing device to move upwards along a wind driven generator to the root of a blade, the blade is positioned in an open slot of a blade overhauling and maintaining platform 1, and a supporting plate 2 is installed around the blade, so that tools of workers can be conveniently placed and a blade clamp can be conveniently supported; after the mounting frames 10 corresponding to the two fixing rings 8 are mounted on the equipment support 7 above the supporting plate 2, the blades are in an inclined state, so that the supporting screw rod 6 of the maintenance platform can be overhauled by rotating the blades, and the equipment support 7 can be adjusted in the position in the vertical direction of the supporting screw rod 6 through the threaded connection relationship between the supporting screw rod 6 and threaded holes at two ends of the equipment support 7, so that the included angle between the blade clamp and the horizontal plane is adjusted, the inclined angle of the blade clamp is ensured to be the same as that of the blades, and the clamping piece 11 can be tightly clamped on the surface of the blade to be replaced when the two fixing rings 8 are locked and fastened through the locking bolt 9; when the blade is replaced, the upward acting force is firstly given to the two hanging rings 16, the bolt of the blade is removed, then the steel wire ropes on the two hanging rings 16 are slowly released, so that the blade can be conveyed to the ground, and when the blade is conveyed, because one end of the pressing tongue 14 is connected with the anchor chain 15 which receives the pulling force, through the lever principle, the other end of the pressing tongue 14 can generate an extrusion force towards the blade direction to the pressing plate 12 on the inner side of the blade clamp mounting frame, and the larger the gravity of the blade is, the larger the extrusion force of the pressing tongue 14 to the pressing plate 12 is, so that the blade can be locked and fixed more stably when being conveyed.
In the second embodiment, based on further improvement of the first embodiment, two ends of two fixing rings 8 of the blade clamp are both fixedly provided with a lock pin 17, the lock pin 17 is provided with a through hole, and a lock bolt 9 respectively penetrates through the through holes corresponding to the two fixing rings 8 and is connected with a lock nut in a threaded manner; a fixed bracket 18 is arranged below the lock pin 17, and two ends of the fixed bracket 18 are fixedly arranged on the upper surface of the supporting plate 2.
Therefore, when two fixing rings 8 are fixed, the locking bolts 9 can horizontally penetrate through the locking pins 17 and then are locked and fixed through the locking nuts, and the locking pins 17 are supported through the fixing supports 18 to ensure the stability of the fixing rings 8 on the surface of the supporting plate 2.
In the third embodiment, based on the further improvement of the first embodiment, two groups of the clasping sheets 11 of the blade clamp are respectively and fixedly installed above and below the two side surfaces of the mounting frame 10, and the inner side surfaces of the clasping sheets 11 are coated with flexible materials. Through 11 combined action of two sets of cohesion pieces to can be more stable when the blade is changed, through at the inboard cladding flexible material of cohesion piece 11, thereby can play the guard action to the blade surface, and also can increase the frictional force between cohesion piece 11 and the blade.
Fourth embodiment, based on the further improvement to first embodiment, the both sides fixed mounting of the open end of blade maintenance platform 1 has slide 19, and surface mounting has pulley 20 on slide 19, and sliding platform 3 divide into two, and all is provided with slide rail 21 below the both sides surface, and pulley 20 swing joint is inside slide rail 21. So that the sliding platform 3 can be moved in a defined position by the action of the pulleys 20 rolling in the sliding tracks 21.
In the fifth embodiment, based on the further improvement of the first embodiment, one end of the telescopic frame 22 is fixedly installed on one side of the blade maintenance platform 1 away from the sliding platform 3, and the roller 23 is installed on the other end of the telescopic frame 22. Therefore, when the blade maintenance platform 1 is lifted by the lifter 4, the position of the roller 23 is adjusted by the telescopic frame 22; and then the roller 23 rolls on the surface of the tower drum of the wind driven generator, so that the stability of the blade maintenance platform 1 can be ensured, and the tower drum of the wind driven generator can be prevented from being scratched due to sliding friction in the lifting process.
The sixth embodiment of the invention also discloses a blade replacing method of the wind driven generator, which comprises the following steps:
1) keeping the blades needing to be replaced in a vertical downward posture, respectively tying a hanging strip or a clamp at the root parts of the other two blades of the wind driven generator, and installing a fixed pulley on the hanging strip or the clamp;
2) lifting the blade replacement device according to any one of claims 1 to 5 to the blade root by means of a hoist 4;
3) installing a blade clamp at the root position of the blade by using the blade maintenance platform 1, and locking and fixing the blade clamp through a locking bolt 9;
4) a steel wire rope of the ground winch passes through the other two blade hanging belts or the fixed pulleys on the clamp, then is connected with the hanging rings 16 on the blade clamp, and the ground winch is started to ensure that the pulling force is not less than the self weight of the blades;
5) the ground small crane is connected to the blade tip part of the blade to be replaced for traction;
6) a constructor removes a blade bolt inside the fan hub;
7) operating the winch to enable the blades to descend at a constant speed; the small-sized crane on the ground is operated to always pull the blade tip part of the blade so as to prevent the blade tip part from colliding with the tower drum of the fan;
8) when the blade tip approaches the ground, the blade tip part is lifted by a small ground crane, and meanwhile, the blade root part continues to descend at a constant speed until the integral attitude of the blade becomes horizontal;
9) operating a small crane and a winch on the ground, slightly putting the blade on a prepared blade bracket, detaching a blade clamp, and then installing the blade clamp on the root of a new blade;
10) starting a winch to hoist the root of the new blade, and simultaneously hoisting the ground small crane from the blade tip side by using the tool to start to install the new blade;
11) installing a connecting bolt of the new blade after the new blade is installed into the hub; lifting the blade maintenance platform to the root of the blade, standing the constructor on the blade maintenance platform 1 to disassemble the blade clamp, disassembling the slings or the clamp and the fixed pulleys on the roots of the other two blades, and operating the blade maintenance platform to land on the ground by the constructor after the operation is finished.
In the embodiment, in step 1), the low-speed rotor lock is started to fix the wind turbine rotor when the blade to be replaced is rotated to the vertical downward position.
In the embodiment, the blade clamp is directly provided with a pulling force through the ground winch, the blade tip part of the blade is provided with a traction force through a small crane, the blade can be conveyed to the ground, the reverse steps can be executed during installation, the operation is convenient and quick, a large-scale hoisting crane is not required to be configured, the whole impeller is not required to be detached from the high-altitude tower frame for replacement, the manpower and material resources are greatly reduced, and the device and the method for replacing the blade of the wind driven generator are less limited by an operation space area and have wider application range.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (7)
1. The utility model provides a aerogenerator's blade changes device, includes blade maintenance platform (1) and blade anchor clamps, its characterized in that: the blade overhauling and maintaining platform (1) is of a U-shaped structure with an opening at one side, the opening side of the blade overhauling and maintaining platform (1) is movably connected with a sliding platform (3), and four corners of the blade overhauling and maintaining platform (1) are fixedly provided with a lifter (4);
the blade overhauling and maintaining platform is characterized in that a supporting plate (2) is arranged in the middle of the upper surface of the blade overhauling and maintaining platform (1), two fixing supports (5) are fixedly arranged on two sides of the upper surface of the supporting plate (2), supporting screw rods (6) are movably connected onto the fixing supports (5), an equipment bracket (7) is arranged between the two supporting screw rods (6) on each side of the upper surface of the supporting plate (2), threaded holes are formed in two ends of the equipment bracket (7), and the supporting screw rods (6) are in threaded connection with the equipment bracket (7) through the threaded holes;
the blade clamp comprises two fixing rings (8), an annular structure is enclosed between the two fixing rings (8), the two fixing rings are locked and fixed through a locking bolt (9), each fixing ring (8) comprises a mounting frame (10) and a holding piece (11), two side faces of each mounting frame (10) are fixedly provided with one end of each holding piece (11) through a bolt, the other end of each holding piece (11) is locked and fixed with the holding piece (11) corresponding to the other fixing ring (8) through the locking bolt (9), a pressing plate (12) is arranged on the inner side of each mounting frame (10), a pressing tongue (14) is movably connected inside each mounting frame (10) through a rotating shaft (13), one end of each pressing tongue (14) is in contact with the pressing plate (12) on the inner side of each mounting frame, and an anti-slip liner (24) is arranged on the surface of each pressing plate (12); the other end fixedly connected with one end of an anchor chain (15) of spatula (14), the other end of anchor chain (15) passes through a chain guide cylinder (25) and is fixedly connected with a hanging ring (16), and mounting bracket (10) is fixedly mounted in the middle of the upper surface of equipment support (7).
2. The blade replacing device for a wind power generator according to claim 1, wherein: two ends of two fixing rings (8) of the blade clamp are fixedly provided with lock pins (17), through holes are formed in the lock pins (17), and the lock bolts (9) penetrate through the through holes corresponding to the two fixing rings (8) respectively and are connected with lock nuts in a threaded mode; a fixing support (18) is arranged below the lock pin (17), and two ends of the fixing support (18) are fixedly arranged on the upper surface of the supporting plate (2).
3. The blade replacing device for a wind power generator according to claim 1, wherein: the blade clamp is characterized in that the two groups of clamping sheets (11) are arranged and fixedly mounted above and below two side faces of the mounting frame (10) respectively, and flexible materials are coated on the inner side surfaces of the clamping sheets (11).
4. The blade replacing device for a wind power generator according to claim 1, wherein: both sides fixed mounting of the open end of blade maintenance platform (1) has slide (19), surface mounting has pulley (20) on slide (19), sliding platform (3) divide into left and right two, and both sides surface below all is provided with slide rail (21), pulley (20) swing joint is inside slide rail (21).
5. The blade replacing device and method for wind power generator according to claim 1, wherein: one side fixed mounting that sliding platform (3) were kept away from in blade maintenance platform (1) has the one end of expansion bracket (22), gyro wheel (23) are installed to the expansion bracket (22) other end.
6. A blade replacing method of a wind driven generator is characterized by comprising the following steps:
1) keeping the blades needing to be replaced in a vertical downward posture, respectively tying a hanging strip or a clamp at the root parts of the other two blades of the wind driven generator, and installing a fixed pulley on the hanging strip or the clamp;
2) lifting the blade changing device of any one of claims 1 to 5 to the blade root by means of a lifter (4);
3) installing a blade clamp at the root of the blade by using the blade maintenance platform (1), and locking and fixing the blade through a locking bolt (9);
4) a steel wire rope of the ground winch passes through the other two blade hanging belts or the fixed pulleys on the clamp, then is connected with a hanging ring (16) on the blade clamp, and the ground winch is started to ensure that the pulling force is not less than the self weight of the blades;
5) the ground small crane is connected to the blade tip part of the blade to be replaced for traction;
6) a constructor removes a blade bolt inside the fan hub;
7) operating the winch to enable the blades to descend at a constant speed; the small-sized crane on the ground is operated to always pull the blade tip part of the blade so as to prevent the blade tip part from colliding with the tower drum of the fan;
8) when the blade tip approaches the ground, the blade tip part is lifted by a small ground crane, and meanwhile, the blade root part continues to descend at a constant speed until the integral attitude of the blade becomes horizontal;
9) operating a small crane and a winch on the ground, slightly putting the blade on a prepared blade bracket, detaching a blade clamp, and then installing the blade clamp on the root of a new blade;
10) starting a winch to hoist the root of the new blade, and simultaneously hoisting the ground small crane from the blade tip side by using the tool to start to install the new blade;
11) installing a connecting bolt of the new blade after the new blade is installed into the hub; lifting the blade overhauling and maintaining platform to the root of the blade, standing a constructor on the blade overhauling and maintaining platform (1) to disassemble a blade clamp, disassembling hanging strips or clamps and fixed pulleys on the roots of the other two blades, and operating the blade overhauling and maintaining platform to land after the operation of the constructor is finished.
7. The method for replacing a blade of a wind turbine according to claim 6, wherein: in the step 1), when the blade to be replaced is rotated to a vertical downward position, a low-speed rotor lock is started to fix the rotor of the wind driven generator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911235800.0A CN112922794B (en) | 2019-12-05 | 2019-12-05 | Blade replacing device and method of wind driven generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911235800.0A CN112922794B (en) | 2019-12-05 | 2019-12-05 | Blade replacing device and method of wind driven generator |
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| Publication Number | Publication Date |
|---|---|
| CN112922794A CN112922794A (en) | 2021-06-08 |
| CN112922794B true CN112922794B (en) | 2022-04-19 |
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| CN201911235800.0A Active CN112922794B (en) | 2019-12-05 | 2019-12-05 | Blade replacing device and method of wind driven generator |
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