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CN111963392B - A method for solving the wear of zero tooth of wind turbine pitch bearing - Google Patents

A method for solving the wear of zero tooth of wind turbine pitch bearing Download PDF

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Publication number
CN111963392B
CN111963392B CN202010708396.0A CN202010708396A CN111963392B CN 111963392 B CN111963392 B CN 111963392B CN 202010708396 A CN202010708396 A CN 202010708396A CN 111963392 B CN111963392 B CN 111963392B
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Prior art keywords
blade
pitch bearing
bolts
variable
pitch
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CN202010708396.0A
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CN111963392A (en
Inventor
侯高明
李勇锋
刘思成
高华
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Guizhou Mingyang New Energy Co ltd
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MingYang Smart Energy Group Co Ltd
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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
    • 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
    • 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
    • F03D13/30—Commissioning, e.g. inspection, testing or final adjustment before releasing for production
    • 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
    • F03D80/70—Bearing or lubricating arrangements
    • 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

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  • Engineering & Computer Science (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 solving zero tooth abrasion of a variable pitch bearing of a wind generating set, which comprises the following steps of 1) replacing a plurality of high-strength bolts with a corresponding number of connecting bolts between the variable pitch bearing and a blade in high altitude, and then removing the residual connecting bolts between the variable pitch bearing and the blade; 2) adjusting the high-strength bolt to move the blade downwards; 3) symmetrically arranging two connecting plates on the blade, connecting the hoisting device with the two connecting plates, and removing all high-strength bolts to completely separate the blade from the variable-pitch bearing; 4) the variable-pitch bearing is rotated through variable-pitch driving of the wind generating set, and the tooth, which is not worn by the variable-pitch bearing, is rotated to a zero-position tooth position; 5) removing the lifting device and the two connecting plates, and butting the blade and the variable-pitch bearing; 6) and zeroing and debugging the blade and the variable pitch bearing through a zero pointer. The method solves the problem of zero tooth abrasion of the variable pitch bearing.

Description

Method for solving zero tooth abrasion of variable pitch bearing of wind generating set
Technical Field
The invention relates to the technical field of wind generating sets, in particular to a method for solving zero tooth abrasion of a variable pitch bearing of a wind generating set.
Background
The wind generating set captures wind resources through the blades, so that the generator is driven to rotate to generate electricity. Usually, when an impeller system provided with 2 or 3 blades is started to a rotating state from a static state, or when the impeller system is required to be converted to a low-speed rotating state or stopped in a typhoon or an extreme wind speed, the state of the blades is required to be adjusted by the rotation of a variable pitch bearing, the blades stay at a fixed position of the variable pitch bearing or a position of a few teeth of the variable pitch bearing (about 5 percent of all teeth of the variable pitch bearing) for most of time, the blades can drive the generator to integrally rotate in order to obtain energy, when the blades rotate slightly or rotate slightly within a range of +/-5 degrees, the power generation requirement can be adjusted, the position where the variable pitch bearing is meshed with a variable pitch driving pinion is called as zero teeth, and the wear and damage of the zero teeth can be caused in the process of slight rotation or slight rotation of the blades. If slight tooth surface abrasion is generally repaired by simple methods such as welding, grinding and the like, the service life of the variable pitch bearing is prolonged as much as possible, but the problem cannot be thoroughly solved; if the damage is serious, a large crane needs to be called to disassemble the blade and the impeller system and then place the blade and the impeller system on the ground to replace the variable-pitch bearing, the workload is very large, and the cost of the whole maintenance process is very high.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides a method for solving the zero-position tooth abrasion of a variable-pitch bearing of a wind generating set, under the conditions that the variable-pitch bearing is not replaced and an impeller system is not required to be disassembled, the problem of zero-position tooth abrasion of the variable-pitch bearing is solved, the damaged variable-pitch bearing can still be continuously used, the service life of parts is prolonged, the maintenance cost is greatly reduced, and the economic loss caused by unit shutdown is reduced.
In order to achieve the purpose, the technical scheme provided by the invention is as follows: a method for solving zero tooth abrasion of a variable pitch bearing of a wind generating set needs to be configured with the following steps: the high-strength bolt comprises high-strength bolts, a connecting plate, a lifting device and a zero pointer, wherein the number of the high-strength bolts is 5% -10% of the number of the connecting bolts between the variable pitch bearing and the blade, and the length of the high-strength bolts is greater than that of the connecting bolts; the method comprises the following specific processes:
1) replacing a corresponding number of connecting bolts between the variable pitch bearing and the blade with a plurality of high-strength bolts in high altitude, distributing the high-strength bolts on two sides of the blade, tightening the torque according to the process requirement, then removing the residual connecting bolts between the variable pitch bearing and the blade, and supporting the connection between the variable pitch bearing and the blade through the high-strength bolts;
2) adjusting the high-strength bolt to enable the blade to move downwards, wherein the distance between the blade and the variable-pitch bearing is 0.5-1 m, and the high-strength bolt is used for installing a connecting plate;
3) the two connecting plates are symmetrically arranged on the other two sides of the blade, the lifting device is connected with the two connecting plates, and after the position of the blade is fixed by the lifting device, all high-strength bolts are removed to completely separate the blade from the variable-pitch bearing;
4) the pitch bearing is rotated through the pitch drive of the wind generating set, and the tooth surface of the pitch bearing which is meshed and abraded with the pitch drive is rotated to the position of a non-meshed state, so that the tooth of the pitch bearing which is not abraded is rotated to the position of a zero-position tooth, and meanwhile, the bolt holes of the rotated pitch bearing are ensured to be in one-to-one correspondence with the bolt holes of the blades;
5) connecting the blade and the variable-pitch bearing by adopting the connecting bolts at the positions where the high-strength bolts are removed again, sequentially removing the hoisting device and the two connecting plates, and installing the residual connecting bolts between the blade and the variable-pitch bearing to complete the butt joint of the blade and the variable-pitch bearing;
6) and zeroing and debugging the blade and the variable pitch bearing through a zero pointer.
Furthermore, the connecting plates are of a poor arch structure, the shape of the arc edges of the connecting plates is adaptive to the shape of the edges of the blades, the surface of the connecting plates is provided with a hanging ring for connecting with a lifting device, a plurality of bolt holes are machined in the hanging ring and are in one-to-one correspondence with the bolt holes in the blades, and the two connecting plates are symmetrically arranged on the blades through the bolt holes in one-to-one correspondence respectively.
Compared with the prior art, the invention has the following advantages and beneficial effects:
the invention solves the problem of zero tooth abrasion of the variable pitch bearing through a simple method, does not need to dismantle an impeller system, can still use the original damaged variable pitch bearing, prolongs the service life of components, effectively saves the cost, simultaneously effectively shortens the field maintenance period, greatly reduces the maintenance cost and reduces the economic loss caused by machine set shutdown.
Drawings
Fig. 1 is a schematic view of the operation of adjusting the distance between the blade and the pitch bearing in step 2) of the method of the present invention.
Fig. 2 is an operation schematic diagram of step 3) connection plate installation of the method.
FIG. 3 is a schematic diagram of the operation of the method of the present invention to address zero tooth wear by rotating the blades.
Fig. 4 is a schematic structural diagram of the connecting plate of the present invention.
Detailed Description
The present invention will be further described with reference to the following specific examples.
The method for solving the zero tooth abrasion of the variable pitch bearing of the wind generating set needs to be configured with the following steps: the high-strength bolt comprises 8 high-strength bolts 1, a connecting plate 2, a hoisting device 3 and a zero pointer, wherein the number of the high-strength bolts 1 is determined according to the total number of connecting bolts between a variable-pitch bearing 4 and a blade 5, preferably 5% -10% of the number of all the connecting bolts, and the length of each high-strength bolt 1 is greater than that of each connecting bolt; the number of the connecting plates 2 is 2, the connecting plates 2 are of a double-arch structure, as shown in fig. 4, the shape of the arc-shaped edge of each connecting plate is adapted to the shape of the edge of the blade 5, the surface of each connecting plate is provided with a lifting ring 201 for connecting with the lifting device 3, and a plurality of bolt holes 202 are machined on each connecting plate and correspond to the bolt holes on the blade 5 one by one; the method comprises the following specific processes:
1) replacing 8 connecting bolts between the variable pitch bearing 4 and the blade 5 with 8 high-strength bolts 1 in high altitude, distributing the high-strength bolts 1 on two sides of the blade 5, tightening the moment according to the process requirement, then removing the residual connecting bolts between the variable pitch bearing 4 and the blade 5, and supporting the connection between the variable pitch bearing 4 and the blade 5 through the 8 high-strength bolts 1;
2) as shown in fig. 1, adjusting a high-strength bolt 1 to enable a blade 5 to move downwards, wherein the distance between the blade 5 and a variable-pitch bearing 4 is 0.5-1 m, and the high-strength bolt is used for installing a connecting plate 2;
3) as shown in fig. 2, 2 connecting plates 2 are arranged on the other two sides of the blade 5 in a one-to-one correspondence manner through bolt holes on the connecting plates and bolt holes of the blade 5, a hoisting device 3 is connected with the 2 connecting plates 2, and after the position of the blade 5 is fixed through the hoisting device 3, all high-strength bolts 1 are removed to completely separate the blade 5 from a variable pitch bearing 4;
4) the variable pitch bearing 4 is rotated through variable pitch driving of the wind generating set, and the tooth surface of the variable pitch bearing 4 which is meshed and abraded with the variable pitch driving is rotated to the position of a non-meshed state, so that the tooth of the variable pitch bearing 4 which is not abraded is rotated to a zero tooth position, and meanwhile, the bolt holes of the variable pitch bearing 4 after rotation are ensured to be in one-to-one correspondence with the bolt holes of the blades 5;
5) connecting the blade 5 and the variable pitch bearing 4 by using the connecting bolt at the position where the high-strength bolt 1 is removed again, sequentially removing the hoisting device 3 and the 2 connecting plates, and installing the residual connecting bolts between the blade 5 and the variable pitch bearing 4 to complete the butt joint of the blade 5 and the variable pitch bearing 4;
6) and zeroing and debugging the blade 5 and the variable pitch bearing 4 through a zeroing pointer.
In addition, in the embodiment, the blade 5 can be rotated by 3 to 4 bolt hole positions in step 4), as shown in fig. 3, the connecting bolt is then adopted to butt the blade 5 and the pitch bearing 4, and the rotation angle of the blade 5, such as 0 to 5 degrees, is changed into 3 to 8 degrees through a unit control program, so that the tooth surface of the pitch bearing 4 and the tooth surface of the pitch drive in meshing wear is rotated to the position of a non-meshing state, that is, the tooth of the pitch bearing 4 which is not worn is rotated to the zero-position tooth position, and continuous wear of the same position is avoided.
The above-mentioned embodiments are merely preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, so that variations based on the shape and principle of the present invention should be covered within the scope of the present invention.

Claims (1)

1.一种解决风力发电机组变桨轴承零位齿磨损的方法，其特征在于，需配置有：高强度螺栓、连接板、起吊装置和零位指针，所述高强度螺栓的数量为变桨轴承与叶片之间的连接螺栓数量的5%～10%，且所述高强度螺栓的长度大于连接螺栓的长度，所述连接板为劣弓形结构，且其弧形边缘形状适应叶片边缘的形状，其表面设有吊环，用于与起吊装置的连接，其上加工有多个螺栓孔，并与叶片上的螺栓孔一一对应；所述方法具体过程为：1. a method for solving the abrasion of zero position teeth of wind turbine pitch bearing, it is characterized in that, need to be equipped with: high-strength bolt, connecting plate, lifting device and zero pointer, the quantity of described high-strength bolt is pitch 5% to 10% of the number of connecting bolts between the bearing and the blade, and the length of the high-strength bolts is greater than the length of the connecting bolts, the connecting plate is an inferior arcuate structure, and its arc edge shape adapts to the shape of the blade edge , its surface is provided with a hoisting ring for connection with the hoisting device, and a plurality of bolt holes are processed on it, which correspond to the bolt holes on the blade one by one; the specific process of the method is as follows: 1）在高空中将多个高强度螺栓替换掉变桨轴承与叶片之间相应数量的连接螺栓，该多个高强度螺栓分布于叶片的两侧，并按照工艺要求打紧力矩，然后拆除变桨轴承与叶片之间剩余的连接螺栓，通过该多个高强度螺栓支撑变桨轴承与叶片的连接；1) Replace the corresponding number of connecting bolts between the pitch bearing and the blade with multiple high-strength bolts at high altitude. The multiple high-strength bolts are distributed on both sides of the blade, and tighten the torque according to the process requirements, and then remove the pitch The remaining connecting bolts between the bearing and the blade support the connection between the pitch bearing and the blade through the plurality of high-strength bolts; 2）调节高强度螺栓使叶片下移，并与变桨轴承之间的间距为0.5～1m，用于连接板的安装；2) Adjust the high-strength bolts to move the blades down, and the distance between them and the pitch bearing is 0.5-1m, which is used for the installation of the connecting plate; 3）两个连接板通过其上的螺栓孔与叶片的螺栓孔一一对应的装于叶片的另外两侧，将起吊装置通过吊环与两个连接板相连接，通过起吊装置固定好叶片的位置后，拆除所有高强度螺栓，使叶片与变桨轴承完全分离；3) The two connecting plates are installed on the other two sides of the blade through the bolt holes on them in one-to-one correspondence with the bolt holes of the blade, and the lifting device is connected to the two connecting plates through the lifting ring, and the position of the blade is fixed by the lifting device. After that, remove all high-strength bolts to completely separate the blade from the pitch bearing; 4）通过风力发电机组的变桨驱动使变桨轴承旋转，使变桨轴承与变桨驱动啮合磨损的齿面旋转至未啮合状态的位置，从而将变桨轴承未受磨损的齿旋转至零位齿位置，同时需保证旋转后的变桨轴承的螺栓孔与叶片的螺栓孔一一对应；4) The pitch bearing is rotated by the pitch drive of the wind turbine, so that the pitch bearing and the pitch drive meshed and worn tooth surfaces are rotated to the position of the unmeshed state, so as to rotate the unworn teeth of the pitch bearing to zero. position of the gear teeth, and at the same time, it is necessary to ensure that the bolt holes of the pitch bearing after rotation correspond to the bolt holes of the blade one-to-one; 5）重新在拆除高强度螺栓的位置采用连接螺栓对叶片和变桨轴承进行连接，并依次拆除起吊装置和两个连接板，并在叶片和变桨轴承之间安装剩余的连接螺栓完成叶片和变桨轴承的对接；5) Use connecting bolts to connect the blade and the pitch bearing again at the position where the high-strength bolts were removed, remove the lifting device and the two connecting plates in turn, and install the remaining connecting bolts between the blade and the pitch bearing to complete the blade and pitch bearing. Butt joint of pitch bearing; 6）通过零位指针对叶片和变桨轴承进行对零和调试。6) Zero and adjust the blade and pitch bearing through the zero pointer.
CN202010708396.0A 2020-07-22 2020-07-22 A method for solving the wear of zero tooth of wind turbine pitch bearing Active CN111963392B (en)

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