CN111207035B - Method for rectifying deviation of blade of wind generating set - Google Patents
Method for rectifying deviation of blade of wind generating set Download PDFInfo
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- CN111207035B CN111207035B CN202010032072.XA CN202010032072A CN111207035B CN 111207035 B CN111207035 B CN 111207035B CN 202010032072 A CN202010032072 A CN 202010032072A CN 111207035 B CN111207035 B CN 111207035B
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- 238000000034 method Methods 0.000 title claims abstract description 23
- 230000008859 change Effects 0.000 claims abstract description 4
- 230000005484 gravity Effects 0.000 claims description 7
- 230000008569 process Effects 0.000 claims description 5
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 2
- 238000012423 maintenance Methods 0.000 abstract description 7
- 239000002002 slurry Substances 0.000 abstract description 2
- 230000009471 action Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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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
- F03D7/00—Controlling wind motors
- F03D7/02—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor
- F03D7/022—Adjusting aerodynamic properties of the blades
- F03D7/0224—Adjusting blade pitch
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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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Wind Motors (AREA)
Abstract
The invention discloses a method for rectifying deviation of a blade of a wind generating set, which solves the problems of higher cost, poorer safety and longer rectifying time in the prior art, and can save economic cost, labor cost and maintenance time, has strong operability of wind field operation and maintenance and can effectively avoid the occurrence of unit accidents. The technical scheme is as follows: adjusting the blades to be in a slurry state; stopping the wind generating set, and operating a high-speed shaft brake disc to enable the blade to be corrected to vertically face downwards; locking the wind wheel by using a wind wheel locking disc, and unloading the stud pre-tightening force of the blade to be rectified and the circumference of the variable pitch bearing; dividing the circumference into four areas, detaching a set number of nuts from each area, and tightening the rest nuts; and operating the manual variable-pitch operation box to repeatedly change the pitch and feathering the blades until the center of the stud is superposed with the center of the connecting hole of the variable-pitch bearing.
Description
Technical Field
The invention relates to the field of wind power application, in particular to a method for rectifying deviation of a blade of a wind generating set.
Background
With the rapid development of wind power generation technology, the installed capacity is increased year by year, the problem of connection between the blades and the variable pitch bearing is more and more, the safe operation of the fan is seriously influenced, and the great attention of various complete machine manufacturers is gradually paid. The blades and the variable pitch bearing are key parts of the wind generating set, and the parts are connected through the high-strength stud, so that the loading condition of the high-strength stud plays an important role in safe and reliable operation of the set. When the blade is assembled with the pitch bearing, the connection diameter is large, the number of the mounting holes is large, the blade is aligned to the pitch bearing by using a crane, and due to a plurality of factors, the connection holes of the blade and the pitch bearing cannot be aligned to the center, so that the connection stud is clamped on the hole wall of the pitch bearing, the bolt is sheared, and the connection reliability and the unit safety are affected.
The blade is thin pole structure in the middle of with the connecting stud who becomes oar bearing, the installation pretightning force is little than normal stud, the wind load that the blade received is complicated changeable, lead to the unit in the operation process, the blade stud is easily not hard up, if the fixed inspection is untimely, the stud pretightning force diminishes, lead to blade and the skew of changing oar bearing emergence, the stud can block on changing oar bearing hole wall, if the unit long-term operation, the shear meeting fracture destruction is received to the stud, the blade can drop, the wind wheel is unbalanced, can arouse the unit to take place serious accidents such as the machine falls.
Due to the particularity of the connecting positions of the blades and the variable-pitch bearing, the blades need to be corrected to enable the connecting holes of the two connecting pieces to be aligned, a crane needs to be used for dragging the blades to correct the deviation, but the crane used in a wind field is high in cost and is limited by land acquisition on the ground, and the implementation is difficult.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a method for rectifying the deviation of the blade of the wind generating set, which can save the economic cost and the labor cost, save the maintenance time, have strong operability of wind field operation and maintenance and effectively avoid the occurrence of unit accidents.
The invention adopts the following technical scheme:
a method for correcting the deviation of a blade of a wind generating set comprises the following steps:
adjusting the blades to be in a slurry state;
stopping the wind generating set, and operating a high-speed shaft brake disc to enable the blade to be corrected to vertically face downwards;
locking the wind wheel by using a wind wheel locking disc, and unloading the stud pre-tightening force of the blade to be rectified and the circumference of the variable pitch bearing;
dividing the circumference into four areas, detaching a set number of nuts from each area, and tightening the rest nuts;
and operating the manual variable-pitch operation box to repeatedly change the pitch and feathering the blades until the center of the eccentric stud is superposed with the center of the connecting hole of the variable-pitch bearing.
Further, 2/3-3/4 nuts are removed from each area of the circumference, and the remaining nuts are manually tightened to support the blade.
Further, observing the offset direction of the stud relative to the variable-pitch bearing through the process hole, and recording.
Further, the blade to be rectified is subjected to pitch variation along a set direction by using a pitch variation manual operation box.
Further, the pitch direction is the circumferential direction with larger deviation distance between the stud and the pitch bearing.
Further, the variable pitch is stopped for a set time at 90 degrees, the blade and the variable pitch bearing generate relative displacement by using the inertia effect of the gravity after the blade is changed into the variable pitch, and then feathering operation is performed.
Further, the variable pitch stopping time is 25-35 s.
Compared with the prior art, the invention has the beneficial effects that:
(1) the invention uses the self resources of the unit, unloads the installation pretightening force of all the connecting studs, uses a small number of connecting studs to bear the gravity of the blade, uses the repeated pitch-changing feathering action and the gravity inertia action of the blade to make the blade and the pitch-changing bearing deviate so as to achieve the purpose that the studs are positioned at the center of the connecting hole of the pitch-changing bearing;
(2) the invention effectively solves the potential risk that the stud is clamped on the hole wall of the variable-pitch bearing and is sheared, eliminates potential safety hazards and ensures the safe and reliable operation of the unit; compared with the traditional method for using the crane to correct the deviation of the connecting surface of the blade and the variable-pitch bearing, the method has the advantages of convenience, rapidness, easiness in operation, high safety, high efficiency, low cost, high timeliness and the like.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.
FIG. 1 is a flow chart of a first embodiment of the present invention;
fig. 2 is a schematic structural diagram of a wind turbine generator according to a first embodiment of the present invention;
fig. 3 is a partial structural schematic view of a wind turbine system according to a first embodiment of the present invention;
FIG. 4 shows a pitch direction according to a first embodiment of the present invention;
wherein, 1-a hub; 2-a pitch bearing; 3-a blade; 4-high speed shaft brake disc; 5-wind wheel lock disc; 6-stud I, 7-stud II; 8-a nut; 9-variable-pitch manual operation box.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an", and/or "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof;
as introduced in the background art, the defects of high cost, poor safety and long deviation rectifying time exist in the prior art, and in order to solve the technical problems, the invention provides a method for rectifying the deviation of the blade of the wind generating set.
The first embodiment is as follows:
the present invention is described in detail below with reference to fig. 1 to 4, and specifically, the structure is as follows:
the embodiment provides a method for rectifying deviation of a blade of a wind generating set, and the wind generating set is as shown in fig. 1 and fig. 2, wherein a cabin is connected with a wind wheel through bolts to form a set main body. The hub 1 is connected with the variable pitch bearing 2 through a stud I6, and the variable pitch bearing 2 is connected with the blade 3 through a stud II7 and a nut 8. The key large components of the unit are connected through the high-strength bolts, so that the high-strength bolts are guaranteed to be in a good stress state.
Specifically, the deviation rectifying method comprises the following steps:
and adjusting three blades 3 of the wind generating set to enable each blade 3 to be in a feathering state. When the blade 3 is in different positions of the wind wheel, the stress of the stud II7 is different, and when the blade 3 to be corrected is in a vertical state and is static, the stud II7 only bears the gravity action of the blade 3, and the stress is minimum.
The wind generating set is shut down, the high-speed shaft brake disc 4 is manually operated, the blades 3 to be corrected are vertically downward, the three blades are arranged in a Y shape, the wind wheel is locked by the wind wheel lock disc 5, and operation and maintenance personnel are guaranteed to safely maintain the wind wheel.
And (4) standing the population cover plate of the blade 3 to be corrected by operation and maintenance personnel, and unloading all the pretightening force of the circumferential connecting stud II 7.
The circumference is divided into 4 areas, and 2/3-3/4 nuts 8 are disassembled on each area. Preferably, the nut 8 of 2/3 is removed, the entire circumference is left with 1/3 of nuts 8, and then the nut 8 is manually tightened to support the weight of the blade 3. And observing the offset direction of the stud II7 relative to the pitch bearing 2 in the hub 1 through the fabrication hole by operation and maintenance personnel, and recording the offset direction.
And (3) carrying out pitch variation on the blade 3 to be corrected by using a pitch variation manual operation box 9, wherein the pitch variation direction is the circumferential direction with larger distance between the stud II7 and the pitch variation bearing 2, the pitch variation is carried out for 90 degrees, the stopping is carried out for about 25-35 s, and then the feathering operation is carried out. Preferably, pitching 90 ° is stopped for about 30 s. At this time, because a small acting force exists between the blade 3 and the variable pitch bearing 2, the blade 3 and the variable pitch bearing can generate small displacement change by utilizing the gravity inertia received after the variable pitch is stopped.
And (4) carrying out pitch variation and feathering according to the method, and repeating the operation for N times. Observing through a process hole in the hub 1, stopping feathering and pitch control operation until the stud II7 is coincident with the gravity center position of a connecting hole of the pitch control bearing 2, and finishing the deviation rectifying process.
According to the embodiment, the deviation correction of the connection surface between the blade 3 and the pitch bearing 2 is completed by utilizing the characteristics of the wind turbine generator, the potential risk that the stud II7 is sheared when being clamped on the hole wall of the pitch bearing 2 is effectively solved, the potential safety hazard is eliminated, and the safe and reliable operation of the wind turbine generator is ensured. Compared with the traditional method for using the crane to correct the deviation of the connecting surface of the blade and the variable-pitch bearing, the method has the advantages of convenience, rapidness, easiness in operation, high safety, high efficiency, low cost, high timeliness and the like.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (4)
1. A method for correcting the deviation of a blade of a wind generating set is characterized by comprising the following steps:
adjusting the blades to be in a feathering state;
stopping the wind generating set, and operating a high-speed shaft brake disc to enable the blade to be corrected to vertically face downwards;
locking the wind wheel by using a wind wheel locking disc, and unloading the stud pre-tightening force of the blade to be rectified and the circumference of the variable pitch bearing;
dividing the circumference into four areas, detaching a set number of nuts from each area, and tightening the rest nuts;
operating the manual variable-pitch operation box to change the pitch of the blade to be corrected along a set direction;
the pitch variation direction is a circumferential direction with a larger distance between the stud and the pitch variation bearing;
the blades are changed to 90 degrees and stop for a set time, the blades and the variable pitch bearing generate relative displacement by using the inertia effect of gravity after the blades are changed to the blades, and then feathering operation is performed;
and repeatedly pitching and feathering the blade until the center of the stud is superposed with the center of the connecting hole of the pitch bearing.
2. The method for rectifying the blade deviation of the wind generating set according to the claim 1, wherein 2/3-3/4 nuts are removed from each area of the circumference, and the rest nuts are manually tightened to support the blade.
3. The method for correcting the blade deviation of the wind generating set according to claim 1, wherein the deviation direction of the stud relative to the pitch bearing is observed through a process hole and recorded.
4. The method for rectifying deviation of blade of wind generating set according to claim 1, characterized in that the pitch stop time is 25 s-35 s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010032072.XA CN111207035B (en) | 2020-01-13 | 2020-01-13 | Method for rectifying deviation of blade of wind generating set |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010032072.XA CN111207035B (en) | 2020-01-13 | 2020-01-13 | Method for rectifying deviation of blade of wind generating set |
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| Publication Number | Publication Date |
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| CN111207035A CN111207035A (en) | 2020-05-29 |
| CN111207035B true CN111207035B (en) | 2021-02-05 |
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| CN111963392B (en) * | 2020-07-22 | 2021-12-10 | 明阳智慧能源集团股份公司 | Method for solving zero tooth abrasion of variable pitch bearing of wind generating set |
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| EP1612413A2 (en) * | 2004-06-30 | 2006-01-04 | General Electric Company | Methods and apparatus for reduction of asymmetric rotor loads in wind turbines |
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| CN109681382A (en) * | 2018-12-29 | 2019-04-26 | 新疆金风科技股份有限公司 | Blade to zero system, to zero method and wind power generating set |
| CN209261742U (en) * | 2018-12-03 | 2019-08-16 | 三一重能有限公司 | Wind power generating set, wind wheel and its blade mounting and positioning device |
| CN110291006A (en) * | 2017-01-30 | 2019-09-27 | 通用电气阿维奥有限责任公司 | The system and method for determining feathering airscrew blade Angle Position |
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2020
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5178518A (en) * | 1990-05-14 | 1993-01-12 | Carter Sr J Warne | Free-yaw, free-pitch wind-driven electric generator apparatus |
| CN1993570A (en) * | 2004-06-25 | 2007-07-04 | 维斯塔斯风力系统有限公司 | Wind turbine driving assembly |
| EP1612413A2 (en) * | 2004-06-30 | 2006-01-04 | General Electric Company | Methods and apparatus for reduction of asymmetric rotor loads in wind turbines |
| CN101194103A (en) * | 2005-06-06 | 2008-06-04 | Imo控股有限责任公司 | Bearing unit for a long rotor blade of a wind power installation, wind power installation comprising one such rotor blade bearing arrangement, and method for operating one such wind power installation |
| CN101464213A (en) * | 2008-12-11 | 2009-06-24 | 三一电气有限责任公司 | Fan yawing test mechanism and fan set testing bench |
| CN101832338A (en) * | 2010-05-11 | 2010-09-15 | 无锡风电设计研究院有限公司 | Coaxially connecting bearing assembly |
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| CN111207035A (en) | 2020-05-29 |
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