CN106887928B - Core pulling method for large-scale main transmission motor - Google Patents
Core pulling method for large-scale main transmission motor Download PDFInfo
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- CN106887928B CN106887928B CN201510941989.0A CN201510941989A CN106887928B CN 106887928 B CN106887928 B CN 106887928B CN 201510941989 A CN201510941989 A CN 201510941989A CN 106887928 B CN106887928 B CN 106887928B
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- support frame
- hoisting
- stator
- motor
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/0006—Disassembling, repairing or modifying dynamo-electric machines
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- Power Engineering (AREA)
- Manufacture Of Motors, Generators (AREA)
Abstract
The invention particularly relates to a core pulling method for a large main transmission motor; the method is characterized in that: after the motor is integrally lifted out, supporting frames are arranged at two ends of the rotor shaft, and the stator is lifted by using a steel wire rope to keep the gap between the rotor and the stator uniform; after the stator is moved to the second support frame, the rotor is supported by using a rotor arc support frame, and an adjusting base plate is arranged on the arc support frame; removing the second support frame, and hoisting the stator to the standby support frame for storage; and hoisting the rotor by using the hoisting beam, and hoisting the rotor on the standby support for storage after the levelness of the rotor meets the requirement. The construction method adopts the plurality of support frames to support the rotor and the stator of the motor in the hoisting process, is particularly suitable for the arc support frames to support the bottom of the rotor for the second time, and achieves the purpose that the stator finishes the drawing (penetrating) work at one time.
Description
Technical Field
The invention relates to the field of large-scale equipment installation, in particular to a core pulling method for a large-scale main transmission motor.
Background
In the process of dismantling the large main transmission motor, the method for drawing (penetrating) the core of the main motor is most critical; in the conventional construction process, the core drawing (threading) of the rotor is generally performed by a method of extending the shaft. The method needs to frequently replace the hoisting position of the rotor and connect and disassemble the extension shaft, and has longer working time and higher labor intensity.
Disclosure of Invention
The invention aims to provide a core pulling method for a large main transmission motor, which can successfully pull (penetrate) a core once and further reduce the labor intensity.
In order to achieve the above object, the present invention is realized by:
a core-pulling method for a large-scale main transmission motor comprises
step 2.1, drawing the position of a steel wire rope hanging point on the rotor according to the size of a hoisting drawing before hoisting, protecting the rotor shaft by using a rubber plate,
2.2, hoisting the rotor to a height of 20mm, and checking the levelness of the rotor, if the levelness is not good, adjusting the position of the steel wire rope according to the offset direction;
step 2.3, integrally hoisting the motor when the levelness of the rotor is less than 5mm/M, stopping the motor when the lifting height of the rotor reaches 300mm, checking the state of a band-type brake to determine whether the rotor slips or not, integrally hoisting the rotor and the stator out after the determination is finished, and using two hemp ropes to control the direction of the rotor during hoisting;
step 3.1, after the motor is integrally lifted out, arranging a first support frame and a second support frame at two ends of a rotor shaft respectively, enabling the motor to be integrally positioned on the support frames, arranging the support frames according to the position of the core-pulling drawing, and padding an arc copper plate between each support frame and a rotor shaft neck; hoisting the stator by using a steel wire rope, and keeping the gap between the rotor and the stator uniform;
3.2, moving the stator to a position 300mm away from the second support frame, stopping, marking the gravity center position of the rotor on the rotor winding iron core according to the drawing size, supporting the rotor by using a rotor arc support frame below the rotor winding iron core according to the gravity center position, cushioning an arc copper plate between the rotor winding iron core and the rotor arc support frame for protection, jacking the rotor by using 1 hydraulic jack with 50 tons below two sides of the rotor arc support frame respectively, and arranging an adjusting cushion plate on the arc support frame after the rotor is lifted to the support frame without stress;
3.3, removing the second support frame, slowly moving the stator out of the rotor, and hoisting the stator to a standby support for storage;
and 3.4, marking a hoisting position on the rotor according to the requirements of a hoisting drawing, protecting the rotor shaft neck by using a rubber plate, hoisting the rotor to the first support frame by using a hoisting beam without stress, checking the levelness of the rotor, and hoisting the rotor on a standby support frame for storage after the levelness of the rotor meets the requirements.
The core pulling method for the large main transmission motor is characterized in that the rotor arc supporting frame comprises a plurality of stand columns arranged in parallel and a cross beam for connecting the stand columns, and universal rollers are arranged below the stand columns.
The construction method adopts the plurality of support frames to support the rotor and the stator of the motor in the hoisting process, is particularly suitable for the arc support frames to support the bottom of the rotor for the second time, and achieves the purpose that the stator finishes the drawing (penetrating) work at one time.
Drawings
Fig. 1 is a first schematic diagram of the hoisting construction.
Fig. 2 is a schematic diagram of the hoisting construction.
Fig. 3 is a third schematic view of the hoisting construction.
Fig. 4 is a fourth schematic view of the hoisting construction.
Fig. 5 is a schematic diagram of the hoisting construction.
Fig. 6 is a side view of the arc support.
Detailed Description
The invention is further illustrated by the following specific examples.
A core-pulling method for a large-scale main transmission motor comprises
as shown in fig. 1, step 2, lifting the stator 1 by the rotor 2, and integrally lifting the stator 1 and the rotor 2;
step 2.1, drawing the position of a steel wire rope hanging point on the rotor 2 according to the size of a hoisting drawing before hoisting, protecting the rotor shaft by using a rubber plate,
step 2.2, after the rotor 2 is lifted to a height of 20mm, the levelness of the rotor 2 is checked, and if the levelness is not good, the position of a steel wire rope is adjusted according to the offset direction;
step 2.3, integrally hoisting the motor when the levelness of the rotor 2 is less than 5mm/M, stopping the motor when the hoisting height of the rotor 2 reaches 300mm, checking the state of a brake to determine whether the rotor slips or not, integrally hoisting the rotor 2 and the stator 1 out after the determination is finished, and using two hemp ropes to control the direction of the rotor 2 during hoisting;
as shown in fig. 2, in step 3.1, after the motor is integrally lifted out, a first support frame 3 and a second support frame 4 are respectively arranged at two ends of a shaft of the rotor 2, the motor is integrally positioned on the support frames 3 and 4, the support frames 3 and 4 are arranged according to the position of the core-pulling drawing, and arc copper plates are padded between the support frames 3 and 4 and the shaft neck of the rotor 2; hoisting the stator 1 by using a steel wire rope, and keeping the gap between the rotor 2 and the stator 1 uniform;
as shown in fig. 3, step 3.2, moving the stator 1 to a position 4300mm away from the second support frame, and then stopping, marking the gravity center position of the rotor 2 on the winding iron core of the rotor 2 according to the drawing size, using the rotor arc support frame 5 to support the rotor 2 below the winding iron core of the rotor 2 according to the gravity center position, padding an arc copper plate 54 between the winding iron core of the rotor 2 and the rotor arc support frame 5 for protection, using 1 hydraulic jack of 50 tons respectively below two sides of the rotor arc support frame 5 to jack up the rotor 2, and after the rotor 2 is lifted to the support frames 3 and 4 without stress, setting an adjusting padding plate on the rotor arc support frame 5;
as shown in fig. 4, step 3.3, the second support frame 4 is removed, the stator 1 slowly moves out of the rotor 2, and is hoisted to the standby support 6 for storage;
as shown in fig. 5, step 3.4, marking a hoisting position on the rotor 2 according to the hoisting drawing requirements, protecting the journal of the rotor 2 by using a rubber plate, hoisting the rotor 2 to the first support frame 3 by using a hoisting beam without stress, checking the levelness of the rotor 2, and hoisting the rotor 2 on the standby support 7 for storage after the levelness of the rotor 2 meets the requirements.
As shown in fig. 6, in the core pulling method for the large main transmission motor, the rotor arc support frame 5 includes a plurality of columns 51 arranged in parallel and a cross beam 52 connecting the plurality of columns, and a universal roller 53 is arranged below the columns 51.
The construction method adopts the plurality of support frames to support the rotor and the stator of the motor in the hoisting process, is particularly suitable for the arc support frames to support the bottom of the rotor for the second time, and achieves the purpose that the stator finishes the drawing (penetrating) work at one time.
Claims (2)
1. A core pulling method for a large main transmission motor is characterized by comprising the following steps: comprises that
Step 1, a rubber plate is inserted between a stator and a rotor, and a rotor iron core is ensured not to be in direct contact with a stator iron core in the hoisting process;
step 2, lifting the whole stator rotor by adopting a rotor lifting stator lifting method;
step 2.1, drawing the position of a steel wire rope hanging point on the rotor according to the size of a hoisting drawing before hoisting, protecting the rotor shaft by using a rubber plate,
2.2, hoisting the rotor to a height of 20mm, and checking the levelness of the rotor, if the levelness is not good, adjusting the position of the steel wire rope according to the offset direction;
step 2.3, integrally hoisting the motor when the levelness of the rotor is less than 5mm/m, stopping the motor when the lifting height of the rotor reaches 300mm, checking the state of a band-type brake to determine whether the rotor slips or not, integrally hoisting the rotor and the stator out after the determination is finished, and using two hemp ropes to control the direction of the rotor during hoisting;
step 3, extracting the rotor from the stator;
step 3.1, respectively arranging a first support frame and a second support frame at two ends of a rotor shaft after the motor is integrally hoisted out, enabling the motor to be integrally positioned on the first support frame and the second support frame, arranging the first support frame and the second support frame according to the position of a core-pulling drawing, and padding arc copper plates between the first support frame and the rotor shaft neck and between the second support frame and the rotor shaft neck; hoisting the stator by using a steel wire rope, and keeping the gap between the rotor and the stator uniform;
3.2, moving the stator to a position 300mm away from the second support frame, stopping, marking the gravity center position of the rotor on the rotor core according to the drawing size, supporting the rotor by using a rotor arc support frame below the rotor core according to the gravity center position, cushioning an arc copper plate between the rotor core and the rotor arc support frame for protection, jacking the rotor by using 1 hydraulic jack with 50 tons below two sides of the rotor arc support frame respectively, and arranging an adjusting cushion plate on the rotor arc support frame after the rotor is lifted to the rotor arc support frame and is not stressed;
3.3, removing the second support frame, slowly moving the stator out of the rotor, and hoisting the stator to a standby support for storage;
and 3.4, marking a hoisting position on the rotor according to the requirements of a hoisting drawing, protecting the rotor shaft neck by using a rubber plate, hoisting the rotor to the first support frame by using a hoisting beam without stress, checking the levelness of the rotor, and hoisting the rotor on a standby support frame for storage after the levelness of the rotor meets the requirements.
2. The core pulling method for the large main transmission motor according to claim 1, which is characterized in that: the rotor arc support frame comprises a plurality of stand columns arranged in parallel and a cross beam connecting the stand columns, and universal rollers are arranged below the stand columns.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510941989.0A CN106887928B (en) | 2015-12-16 | 2015-12-16 | Core pulling method for large-scale main transmission motor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510941989.0A CN106887928B (en) | 2015-12-16 | 2015-12-16 | Core pulling method for large-scale main transmission motor |
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| CN106887928A CN106887928A (en) | 2017-06-23 |
| CN106887928B true CN106887928B (en) | 2020-07-28 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107204690B (en) * | 2017-07-19 | 2020-05-05 | 中国二十冶集团有限公司 | Core pulling method for overhauling large motor |
| CN107591965B (en) * | 2017-09-06 | 2020-04-14 | 中国二十冶集团有限公司 | Core penetrating method for hydraulic motor with short limit shaft |
| CN107404199B (en) * | 2017-09-20 | 2019-09-10 | 中国二十冶集团有限公司 | A method of punching is taken out for motor |
| CN109639065A (en) * | 2017-10-09 | 2019-04-16 | 上海宝冶集团有限公司 | Combined support frame for Large Rotor core pulling |
| CN109347269A (en) * | 2018-09-18 | 2019-02-15 | 中国神华能源股份有限公司 | The installation method of the rotor of generator |
| CN110356973A (en) * | 2019-07-01 | 2019-10-22 | 中船澄西船舶修造有限公司 | A kind of hanging method and hoisting fixture of jackshaft |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59148549A (en) * | 1983-02-14 | 1984-08-25 | Fuji Electric Co Ltd | Pulling and hanging method of rotor for lateral electric machine |
| JPH05115155A (en) * | 1991-10-21 | 1993-05-07 | Nippon Steel Corp | Ac motor for driving mill |
| CN101114786A (en) * | 2007-08-28 | 2008-01-30 | 天津二十冶建设有限公司 | Hanging method using C-beam piercing core hanging large-scale electric motor and C-beam structure |
| CN101257238A (en) * | 2008-04-10 | 2008-09-03 | 中国第一冶金建设有限责任公司 | Method for electric motor with stationary rotor to on site penetrate rotor |
| CN101277049A (en) * | 2007-03-28 | 2008-10-01 | 中国第二十冶金建设公司 | Method for core-crossing hanging large-scale motor hydraulic ram lifting |
| CN201821226U (en) * | 2010-06-30 | 2011-05-04 | 中国华冶科工集团有限公司 | Lifting device of large synchronous motor |
| KR101087133B1 (en) * | 2009-10-29 | 2011-11-25 | 현대제철 주식회사 | Apparatus for extracting rotor |
| CN102306979A (en) * | 2011-09-10 | 2012-01-04 | 中国十七冶集团有限公司 | Core pulling and threading method for overhauling of large motor |
-
2015
- 2015-12-16 CN CN201510941989.0A patent/CN106887928B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59148549A (en) * | 1983-02-14 | 1984-08-25 | Fuji Electric Co Ltd | Pulling and hanging method of rotor for lateral electric machine |
| JPH05115155A (en) * | 1991-10-21 | 1993-05-07 | Nippon Steel Corp | Ac motor for driving mill |
| CN101277049A (en) * | 2007-03-28 | 2008-10-01 | 中国第二十冶金建设公司 | Method for core-crossing hanging large-scale motor hydraulic ram lifting |
| CN101114786A (en) * | 2007-08-28 | 2008-01-30 | 天津二十冶建设有限公司 | Hanging method using C-beam piercing core hanging large-scale electric motor and C-beam structure |
| CN101257238A (en) * | 2008-04-10 | 2008-09-03 | 中国第一冶金建设有限责任公司 | Method for electric motor with stationary rotor to on site penetrate rotor |
| KR101087133B1 (en) * | 2009-10-29 | 2011-11-25 | 현대제철 주식회사 | Apparatus for extracting rotor |
| CN201821226U (en) * | 2010-06-30 | 2011-05-04 | 中国华冶科工集团有限公司 | Lifting device of large synchronous motor |
| CN102306979A (en) * | 2011-09-10 | 2012-01-04 | 中国十七冶集团有限公司 | Core pulling and threading method for overhauling of large motor |
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| CN106887928A (en) | 2017-06-23 |
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