CN113339313B - Centrifugal adjusting method for odd asymmetric radial tile gaps of shaft seal type nuclear main pump - Google Patents
Centrifugal adjusting method for odd asymmetric radial tile gaps of shaft seal type nuclear main pump Download PDFInfo
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- CN113339313B CN113339313B CN202110771374.3A CN202110771374A CN113339313B CN 113339313 B CN113339313 B CN 113339313B CN 202110771374 A CN202110771374 A CN 202110771374A CN 113339313 B CN113339313 B CN 113339313B
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- radial
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/04—Shafts or bearings, or assemblies thereof
- F04D29/046—Bearings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/60—Mounting; Assembling; Disassembling
- F04D29/601—Mounting; Assembling; Disassembling specially adapted for elastic fluid pumps
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention relates to a centrifugal adjusting method for an odd number asymmetric radial tile gap of a shaft seal type nuclear main pump of a nuclear power station, which is used for completing the assembly of a radial bearing: bearing room (1), slider (2), spherical (3), slider adjusting bolt (4), hexagon nut (5), radial tile (7), spherical screw (8), hexagon head screw (9), adjusting screw gasket (10), tile base (11) are accomplished according to the drawing assembly, make slider (2) and spherical (3) laminating, and hexagon nut (5) are in the state of loosening. The invention can ensure the coaxiality between the radial tiles and the gap between the bearing sleeve and the radial tiles, and solves the problems that the bearing sleeve and the radial tiles are not coaxial due to the asymmetrical structure and odd distribution of the radial tiles and the gap between the bearing sleeve and the radial tiles is not uniform due to inaccurate adjustment of the radial tiles.
Description
The technical field is as follows:
the invention relates to a centrifugal adjusting method for radial tile gaps of an odd number asymmetric structure of a shaft seal type nuclear main pump of a nuclear power station.
Background art:
the radial bearing of the shaft-sealed nuclear main pump of the nuclear power station is a main component of a bidirectional thrust bearing and is also a key component of the nuclear main pump, and the control of the odd number of radial tile gaps with asymmetric structures is particularly important for normal operation of the shaft-sealed nuclear main pump and localization of a main pump manufacturing technology. The accurate adjustment of the gap between the odd asymmetric-structure radial tiles of the shaft seal type nuclear main pump is always a difficult process problem. The adjustment technology of the gap of the traditional radial tile with the even symmetrical structure is not suitable for the novel radial tile with the odd asymmetrical structure, the adjustment mode is a cross symmetry method, and when the technology is used for the radial tile with the odd asymmetrical structure, obvious quality defects can be generated, and the adjustment technology comprises the following steps: all radial tile inner circles disalignment, the not equidirectional radial tile is inhomogeneous with bearing sleeve's clearance, thereby lead to radial tile and bearing sleeve clearance uncontrolled and unable accurate measurement, lead to the bearing sleeve to pack into in the radial tile even, radial tile needs readjustment clearance, and the result of readjustment is still not accurate enough, the loss and the time limit for a project delay of cost have been brought, even pack into and also probably cause bearing sleeve eccentric, thereby make bearing sleeve and radial tile eccentric wear, produce the metal debris, oil temperature oil pressure is unusual, the main pump vibration is too big, then can cause nuclear power plant's accident more seriously.
The invention content is as follows:
the invention aims to disclose a centrifugal adjusting method for an odd number of asymmetric radial tile gaps of a shaft seal type nuclear main pump, which has the advantages of high reliability, high precision, high efficiency and stable data. The technical scheme of the invention is as follows: adopting a taper tool to adjust and measure the gap with a feeler gauge so as to enable each radial tile to be coaxial and determine the gap between the bearing sleeve and the radial tile, and comprising the following steps:
1) and (3) finishing the radial bearing assembly: the bearing assembly device comprises a bearing chamber (1), a sliding block (2), a spherical part (3), a sliding block adjusting bolt (4), a hexagon nut (5), a radial tile (7), a spherical part screw (8), a hexagon head screw (9), an adjusting screw gasket (10) and a tile base (11), wherein the assembly is completed according to a drawing, so that the sliding block (2) is attached to the spherical part (3), and the hexagon nut (5) is in a loose state;
2) the sliding block adjusting bolt (4) is seen from the upward view direction, the sliding block adjusting bolt (4) is rotated clockwise, the sliding block (2) is lifted, the distance between the sliding block adjusting bolt (4) and the end face of the hexagon nut (5) is H, and the distance is recorded
H＝5mm±0.1mm
3) Putting a conical tool (6) in the middle of a radial tile (7), pressing the conical tool (6) to enable the conical tool (6) to be in contact with the radial tile (7), measuring whether a clearance A between the conical tool (6) and each radial tile (7) meets A & lt 0.02mm by using a feeler gauge (12), if the clearance A exceeds 0.02mm, clockwise rotating a sliding block adjusting bolt (4) to enable a sliding block (2) to be lifted, and enabling the radial tile (7) to move towards the conical tool (6) to enable the clearance A between the conical tool (6) and each radial tile (7) to meet A & lt 0.02 mm;
4) rotating the sliding block adjusting bolt (4) counterclockwise for a quarter of a turn, lowering the height of the sliding block (2), pressing the conical tool (6) downwards to enable the conical tool (6) to be in contact with the radial tiles (7), enabling the radial tiles (7) to move towards the bearing chamber (1), measuring whether a clearance A between the conical tool (6) and each radial tile (7) meets A & lt 0.02mm by using a feeler gauge (12), and if the clearance A exceeds 0.02mm, rotating the sliding block adjusting bolt (4) clockwise, lifting the sliding block (2) to enable the radial tiles (7) to move towards the conical tool (6) to enable the clearance A between the conical tool (6) and each radial tile (7) to meet A & lt 0.02 mm;
5) and (4) repeating the step (2), gradually reducing the height of the sliding block (2) to enable all the radial tiles (7) to synchronously move towards the bearing chamber (1) until the conical tool (6) completely falls into the radial tiles (7), enabling the clearance A to meet the requirement that A is less than 0.02mm, and locking the hexagonal nut (5), so that the centrifugal adjustment work of the radial tile clearance is completed.
The working principle of the invention is as follows:
the working process and principle of the invention are that firstly, the wedge-shaped sliding block with small top and big bottom is lifted to the highest, and the thickness of the sliding block with the height of the spherical part is changed to push the spherical part and the radial tile to move towards the conical tool, so that the distance between the radial tile and the center is minimized. The spherical part is in spherical contact with the radial tile and has a certain degree of rotational freedom, so that the radial tile can freely move on the tile base in a horizontal direction. Then put into radial tile with the toper instrument, use the clearance gauge to measure and preliminary adjustment makes all radial tiles coaxial, then through screwing the slider adjusting bolt height that reduces in step, the slider thickness at spherical component place height diminishes simultaneously, radial tile and spherical component can be automatic after receiving toper instrument dead weight and the extrusion force of pressing down the production, move to the bearing room simultaneously to make radial tile internal diameter grow, make it the same with the maximum diameter of toper instrument finally, and the maximum diameter of toper instrument is the final radial tile clearance adjustment size promptly. After the inner diameter of the radial tile is enlarged every time, the clearance between the radial tile and the conical tool is measured by using the feeler gauge, and the radial tile with the out-of-tolerance clearance is adjusted to meet the requirement, so that all the radial tiles are always coaxial. And repeating the adjusting and measuring steps, gradually reducing the height of the sliding block, amplifying the inner diameter of the radial tile, and measuring the gap between the radial tile and the conical tool and adjusting the gap to be qualified after amplifying the inner diameter of the radial tile every time in order to control all the radial tiles to be coaxial.
The invention has the technical effects that:
when a shaft system of the nuclear main pump rotates, the shaft system runs in the theoretical running center of the main pump, a motor shaft providing power in the shaft system penetrates through the radial bush and extends to the lower part of the bidirectional thrust bearing, the motor shaft runs in the center of the radial bearing, the center of the radial bearing is in the running center of the main pump, and the coaxiality of the radial bearing and a bearing sleeve on the motor shaft determines whether the center of the motor shaft is accurately positioned in the theoretical running center of the main pump. The odd number of the radial tiles which are asymmetrically distributed are contact parts of the radial bearing and the motor shaft, the clearance between the radial tiles and the bearing sleeve and the coaxiality between the radial tiles determine the coaxiality between the radial tiles and the motor shaft, if the clearance between the radial tiles and the bearing sleeve is not uniform, the radial bearing and the motor shaft are not coaxial, the center of the motor shaft is not positioned at the running center of a main pump, and if the center of the motor shaft deviates from the position of the running center of the main pump, the inner circle of the radial tiles is eccentrically ground when a shaft system runs, so that the damage of the radial tiles, the generation of metal scraps, the abnormal oil temperature and oil pressure, the vibration increase of the main pump or more serious accidents are caused.
The invention creatively adopts a taper tool to adjust and measure the clearance with the feeler gauge, thereby determining the clearance between the bearing sleeve and the radial tile and ensuring the radial tiles to be coaxial. The method has the advantages that the inner diameter of the radial tile can be accurately adjusted, and the gap between the radial tile and the bearing sleeve can be accurately controlled, so that the radial tile and the motor shaft are ensured to be coaxial. And secondly, after the adjustment in the step 4), the clearance between the radial tile and the conical tool is required to be measured by using a feeler gauge to be less than 0.02mm, so that the coaxiality between the radial tiles has accurate data, the accuracy of the adjustment of the radial tiles is improved, and the radial tiles in the radial bearing can be uncertain in data and cannot be accurately measured by using a traditional method due to too large freedom degree. Thirdly, the method improves the adjusting efficiency and reduces the assembling time due to the accuracy of adjusting the radial tile gap. And fourthly, the method is superior to the traditional method, the radial tile gap can be accurately adjusted by using a simple conical tool and a feeler gauge, and the condition that the traditional method is repeatedly operated and cannot accurately adjust the size to cause rework is avoided. Fifthly, due to the fact that the accuracy of the method for adjusting the gap between the radial tiles reduces the vibration value of the whole main pump caused by the fact that the radial tiles and the motor shaft are not coaxial, abrasion of a radial bearing is reduced, the service life is prolonged, and the risk of shutdown of the shaft seal type nuclear main pump is reduced.
Description of the drawings:
FIG. 1 radial bearing Assembly drawing
FIG. 2 is a schematic view of adjusting the distance between the sliding blocks
FIG. 3 schematic view of the gap between the tapered tool and the radial shoe
The specific implementation mode is as follows:
the centrifugal adjusting method for the radial tile gap of the axial seal type nuclear main pump of the nuclear power station with the odd number asymmetric structure is high in reliability, high in precision, high in efficiency and stable in data. In order to realize the purpose, the scheme is as follows: centrifugal adjusting method for odd asymmetric radial tile gaps of shaft seal type nuclear main pump
As shown in fig. 1, the clearance is measured with a feeler gauge using a taper tool to make the radial shoes coaxial and determine the clearance between the bearing sleeve and the radial shoes, the method comprising the following steps:
1) and finishing the radial bearing assembly: the bearing chamber 1, the sliding block 2, the spherical part 3, the sliding block adjusting bolt 4, the hexagon nut 5, the radial tile 7, the spherical part screw 8, the hexagon head screw 9, the adjusting screw gasket 10 and the tile base 11 are assembled according to a drawing, so that the sliding block 2 is attached to the spherical part 3, and the hexagon nut 5 is in a loose state;
2) looking at the slide adjusting bolt 4 from the bottom view direction of fig. 2, rotating the slide adjusting bolt 4 clockwise to lift the slide 2, so that the distance between the slide adjusting bolt 4 and the end face of the hexagon nut 5 is H, and recording
H＝5mm±0.1mm
3) Putting a conical tool 6 in the middle of the radial tiles 7, pressing the conical tool 6 to enable the conical tool 6 to be in contact with the radial tiles 7, measuring whether a clearance A between the conical tool 6 and each radial tile 7 meets A & lt 0.02mm by using a feeler gauge 12, and if the clearance A exceeds 0.02mm, clockwise rotating the sliding block adjusting bolt 4 to enable the sliding block 2 to be lifted, enabling the radial tiles 7 to move towards the conical tool 6, and enabling the clearance A between the conical tool 6 and each radial tile 7 to meet A & lt 0.02 mm;
4) as shown in fig. 3, the slide adjusting bolt 4 is rotated counterclockwise a quarter turn, the height of the slide 2 is lowered, the tapered tool 6 is pressed downward to make the tapered tool 6 contact with the radial shoes 7, the radial shoes 7 move toward the bearing chamber 1, the feeler gauge 12 is used to measure whether the gap a between the tapered tool 6 and each radial shoe 7 satisfies a < 0.02mm, if the gap a exceeds 0.02mm, the slide adjusting bolt 4 is rotated clockwise to raise the slide 2, the radial shoes 7 move toward the tapered tool 6, so that the gap a between the tapered tool 6 and each radial shoe 7 satisfies a < 0.02 mm;
5) and (5) repeating the step 4), gradually reducing the height of the sliding block 2 to enable all the radial tiles 7 to synchronously move towards the bearing chamber 1 until the conical tool 6 completely falls into the radial tiles 7 and the clearance A is less than 0.02mm, and locking the hexagonal nut 5 to complete the centrifugal adjustment work of the radial tile clearance.
Claims (1)
1. The centrifugal adjusting method of the odd asymmetric radial tile gap of the shaft seal type nuclear main pump is characterized by comprising the following steps:
adopting a taper tool to adjust and measure the gap with a feeler gauge so as to enable each radial tile to be coaxial and determine the gap between a bearing sleeve and the radial tile, and comprising the following steps:
1) and finishing the radial bearing assembly: the bearing assembly device comprises a bearing chamber (1), a sliding block (2), a spherical part (3), a sliding block adjusting bolt (4), a hexagon nut (5), a radial tile (7), a spherical part screw (8), a hexagon head screw (9), an adjusting screw gasket (10) and a tile base (11), wherein the assembly is completed according to a drawing, so that the sliding block (2) is attached to the spherical part (3), and the hexagon nut (5) is in a loose state;
2) the slider adjusting bolt (4) is seen from the upward view direction, the slider adjusting bolt (4) is rotated clockwise, the slider (2) is lifted, the distance between the slider adjusting bolt (4) and the end face of the hexagon nut (5) is H, and the distance is recorded
H＝5mm±0.1mm
3) Putting a conical tool (6) in the middle of a radial tile (7), pressing the conical tool (6) to enable the conical tool (6) to be in contact with the radial tile (7), measuring whether a clearance A between the conical tool (6) and each radial tile (7) meets A & lt 0.02mm by using a feeler gauge (12), if the clearance A exceeds 0.02mm, clockwise rotating a sliding block adjusting bolt (4) to enable a sliding block (2) to be lifted, and enabling the radial tile (7) to move towards the conical tool (6) to enable the clearance A between the conical tool (6) and each radial tile (7) to meet A & lt 0.02 mm;
4) rotating the sliding block adjusting bolt (4) anticlockwise for a quarter of a circle, reducing the height of the sliding block (2), pressing the conical tool (6) downwards to enable the conical tool (6) to be in contact with the radial tiles (7) to enable the radial tiles (7) to move towards the bearing chamber (1), measuring whether a clearance A between the conical tool (6) and each radial tile (7) meets A & lt 0.02mm by using a feeler gauge (12), and if the clearance A exceeds 0.02mm, rotating the sliding block adjusting bolt (4) clockwise, lifting the sliding block (2) to enable the radial tiles (7) to move towards the conical tool (6) to enable the clearance A between the conical tool (6) and each radial tile (7) to meet A & lt 0.02 mm;
5) and (5) repeating the step (4), gradually reducing the height of the sliding block (2) to enable all the radial tiles (7) to synchronously move towards the bearing chamber (1) until the conical tool (6) completely falls into the radial tiles (7), and locking the hexagonal nut (5) when the clearance A meets the condition that A is less than 0.02mm, so that the centrifugal adjustment work of the clearance of the radial tiles is completed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110771374.3A CN113339313B (en) | 2021-07-08 | 2021-07-08 | Centrifugal adjusting method for odd asymmetric radial tile gaps of shaft seal type nuclear main pump |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110771374.3A CN113339313B (en) | 2021-07-08 | 2021-07-08 | Centrifugal adjusting method for odd asymmetric radial tile gaps of shaft seal type nuclear main pump |
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| CN113339313A CN113339313A (en) | 2021-09-03 |
| CN113339313B true CN113339313B (en) | 2022-07-22 |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114406954A (en) * | 2022-02-09 | 2022-04-29 | 哈尔滨电气动力装备有限公司 | Clamping type adjusting method for odd number asymmetric radial tile gap of shaft seal type nuclear main pump |
Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0806579A2 (en) * | 1996-05-10 | 1997-11-12 | WILO GmbH | Self-aligning axial bearing |
| JP2010196805A (en) * | 2009-02-25 | 2010-09-09 | Nsk Ltd | Bearing device |
| CN202031758U (en) * | 2011-03-21 | 2011-11-09 | 福建南电股份有限公司 | Novel guide bearing gap adjusting structure |
| CN203743221U (en) * | 2013-12-26 | 2014-07-30 | 重庆水轮机厂有限责任公司 | Bevel wedge type guide bearing bush gap adjusting device of water turbine |
| CN105090241A (en) * | 2015-09-10 | 2015-11-25 | 浙江正盛轴瓦有限责任公司 | Adjusting device for water guide shoe |
| CN205089804U (en) * | 2015-09-10 | 2016-03-16 | 浙江正盛轴瓦有限责任公司 | Turbine guide bearing |
| CN205806220U (en) * | 2016-07-12 | 2016-12-14 | 哈尔滨电机厂（昆明）有限责任公司 | A kind of hydraulic turbine main shaft guide bearing tiltedly carving adjustment |
| CN106595435A (en) * | 2016-12-22 | 2017-04-26 | 重庆水轮机厂有限责任公司 | Method for checking structure adjusting range of water turbine wedge block guide bearing |
| CN109405714A (en) * | 2018-12-13 | 2019-03-01 | 哈尔滨电气动力装备有限公司 | Reactor coolant pump thrust disc measurement of fit clearance device |
| JP2019038052A (en) * | 2017-08-23 | 2019-03-14 | 旭イノベックス株式会社 | Oil seal removal jig |
| CN109713862A (en) * | 2019-03-05 | 2019-05-03 | 中广核核电运营有限公司 | Sealing bearing bush support adjusts tool and its method of adjustment |
| CN208996970U (en) * | 2018-09-18 | 2019-06-18 | 台州德基水泵科技有限公司 | A kind of connection cover structure |
| CN109931839A (en) * | 2019-03-21 | 2019-06-25 | 哈尔滨电气动力装备有限公司 | Nuclear power station axle envelope core main pump positioning bidirectional thrust bearing center adjustment method |
| CN210739161U (en) * | 2019-08-15 | 2020-06-12 | 新昌县大市聚腾龙轴承厂 | Circular tile thrust bearing convenient to installation |
| CN112268066A (en) * | 2020-10-14 | 2021-01-26 | 中车株洲电机有限公司 | Motor, gap adjusting device and gap adjusting method |
| CN112975843A (en) * | 2021-04-13 | 2021-06-18 | 西安航空制动科技有限公司 | Device for adjusting assembly clearance of aircraft wheel bearing |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050147334A1 (en) * | 2002-04-16 | 2005-07-07 | Toyoji Kanazawa | Bearing device and motor using the bearing device |
-
2021
- 2021-07-08 CN CN202110771374.3A patent/CN113339313B/en active Active
Patent Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0806579A2 (en) * | 1996-05-10 | 1997-11-12 | WILO GmbH | Self-aligning axial bearing |
| JP2010196805A (en) * | 2009-02-25 | 2010-09-09 | Nsk Ltd | Bearing device |
| CN202031758U (en) * | 2011-03-21 | 2011-11-09 | 福建南电股份有限公司 | Novel guide bearing gap adjusting structure |
| CN203743221U (en) * | 2013-12-26 | 2014-07-30 | 重庆水轮机厂有限责任公司 | Bevel wedge type guide bearing bush gap adjusting device of water turbine |
| CN105090241A (en) * | 2015-09-10 | 2015-11-25 | 浙江正盛轴瓦有限责任公司 | Adjusting device for water guide shoe |
| CN205089804U (en) * | 2015-09-10 | 2016-03-16 | 浙江正盛轴瓦有限责任公司 | Turbine guide bearing |
| CN205806220U (en) * | 2016-07-12 | 2016-12-14 | 哈尔滨电机厂（昆明）有限责任公司 | A kind of hydraulic turbine main shaft guide bearing tiltedly carving adjustment |
| CN106595435A (en) * | 2016-12-22 | 2017-04-26 | 重庆水轮机厂有限责任公司 | Method for checking structure adjusting range of water turbine wedge block guide bearing |
| JP2019038052A (en) * | 2017-08-23 | 2019-03-14 | 旭イノベックス株式会社 | Oil seal removal jig |
| CN208996970U (en) * | 2018-09-18 | 2019-06-18 | 台州德基水泵科技有限公司 | A kind of connection cover structure |
| CN109405714A (en) * | 2018-12-13 | 2019-03-01 | 哈尔滨电气动力装备有限公司 | Reactor coolant pump thrust disc measurement of fit clearance device |
| CN109713862A (en) * | 2019-03-05 | 2019-05-03 | 中广核核电运营有限公司 | Sealing bearing bush support adjusts tool and its method of adjustment |
| CN109931839A (en) * | 2019-03-21 | 2019-06-25 | 哈尔滨电气动力装备有限公司 | Nuclear power station axle envelope core main pump positioning bidirectional thrust bearing center adjustment method |
| CN210739161U (en) * | 2019-08-15 | 2020-06-12 | 新昌县大市聚腾龙轴承厂 | Circular tile thrust bearing convenient to installation |
| CN112268066A (en) * | 2020-10-14 | 2021-01-26 | 中车株洲电机有限公司 | Motor, gap adjusting device and gap adjusting method |
| CN112975843A (en) * | 2021-04-13 | 2021-06-18 | 西安航空制动科技有限公司 | Device for adjusting assembly clearance of aircraft wheel bearing |
Non-Patent Citations (2)
| Title |
|---|
| 不同轴瓦结构滑动轴承-转子系统的稳定性;李梦暄等;《浙江大学学报(工学版)》;20171115(第11期);全文 * |
| 分块瓦水导轴承的安装与调整;陈勇章;《东方电气评论》;20151225(第04期);全文 * |
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