CN114915116B - Nuclear power generator rotor shaft lifting and coiling method and shaft lifting support device thereof - Google Patents

Nuclear power generator rotor shaft lifting and coiling method and shaft lifting support device thereof Download PDF

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Publication number
CN114915116B
CN114915116B CN202210072703.XA CN202210072703A CN114915116B CN 114915116 B CN114915116 B CN 114915116B CN 202210072703 A CN202210072703 A CN 202210072703A CN 114915116 B CN114915116 B CN 114915116B
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China
Prior art keywords
roller
shaft
support bracket
rotor
lifting
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CN202210072703.XA
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Chinese (zh)
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CN114915116A (en
Inventor
任锋
王进
王辉
孙永刚
周燕
梁伟
高国丰
乔志刚
彭方顺
马烨一
饶海滨
陈俊开
赵俊
衣海伟
国涛杰
董超
钟文轩
国瑞
邓国彬
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China General Nuclear Power Corp
CGN Power Co Ltd
Yangjiang Nuclear Power Co Ltd
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China General Nuclear Power Corp
CGN Power Co Ltd
Yangjiang Nuclear Power Co Ltd
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Application filed by China General Nuclear Power Corp, CGN Power Co Ltd, Yangjiang Nuclear Power Co Ltd filed Critical China General Nuclear Power Corp
Priority to CN202210072703.XA priority Critical patent/CN114915116B/en
Publication of CN114915116A publication Critical patent/CN114915116A/en
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Publication of CN114915116B publication Critical patent/CN114915116B/en
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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
    • 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
    • H02K15/02—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
    • 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
    • Y02E30/00—Energy generation of nuclear origin

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Power Engineering (AREA)
  • Manufacture Of Motors, Generators (AREA)

Abstract

The invention discloses a shaft lifting and coiling method of a nuclear power generator rotor and a shaft lifting and supporting device thereof, wherein the shaft lifting and supporting device comprises a front-end shaft lifting mechanism and a rear-end shaft lifting mechanism, the front-end shaft lifting mechanism comprises a first supporting bracket, a first roller assembly, a first power mechanism and an adjusting compensation piece, and the rear-end shaft lifting mechanism comprises a second supporting bracket, a second roller assembly, a second power mechanism and an adjusting compensation piece; the method comprises the steps of removing front and rear lower oil baffles of the generator end cover, and respectively installing shaft lifting supporting devices at the front and rear lower oil baffles of the generator end cover; lifting the generator rotor by using a front end lifting shaft mechanism and a rear end lifting shaft mechanism in the lifting shaft supporting device; the disc shaft pin is inserted into a front pair of wheel pin holes of the generator, and the nylon suspender is used for hanging the driving disc shaft; after the shaft is coiled, the front-end shaft lifting mechanism and the rear-end shaft lifting mechanism are used for putting down the generator rotor; removing the lifting shaft supporting device; the tool is convenient to disassemble and assemble, safe and reliable; the method has simple process and convenient operation and control of maintenance personnel.

Description

Nuclear power generator rotor shaft lifting and coiling method and shaft lifting support device thereof
Technical Field
The invention belongs to the technical field of nuclear power, and relates to a shaft lifting and coiling method of a nuclear power generator rotor and a shaft lifting and supporting device of the nuclear power generator rotor.
Background
End covers (the weight of the end covers phi 4.5 meters and the weight of the upper end cover and the lower end cover are respectively 14T) are arranged on two sides of the generator, a lower half-bushing is arranged on the upper part of the end cover, and generator gas and excitation end support bearings are arranged on the bushing and are used for supporting a generator rotor.
Because the weight of the generator rotor is about 185T, the mass of the generator rotor is fully borne on the lower half of the generator gas and the exciting end bearing and the lower bearing pillow of the generator gas and the exciting end bearing, but the width of the lower bearing pillow is limited, the lower bearing pillow of the generator gas and the exciting end bearing is inevitably deformed, and the gap between the bearing pillow and the opening is reduced. In the maintenance process, the generator rotor (such as disassembly and assembly work of a stator blade seat, excitation and alignment work of a generator), which is required to be lifted and driven frequently, is lifted and supported, and the existing generator rotor shaft lifting support tool has the following problems: the lifting shaft function can only be realized, the shaft coiling can not be realized, the top shaft oil needs to be started during shaft coiling, and the starting of the top shaft oil needs to meet the requirement that an oil system is available, so that the maintenance work of the oil system is performed in a main line construction period, the maintenance construction period is greatly shortened, and the overhaul main line construction period of a rotor project of a generator is severely restricted; or, the overhead oil pump is not started, and the crane is used for carrying out the shaft coiling work, so that the front and rear bearing bushes of the generator are damaged due to the heavy weight of the rotor of the generator, and the shaft coiling pin is broken, so that industrial safety accidents and equipment damage accidents are easy to occur.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the shaft lifting supporting device which is convenient to assemble and disassemble, safe, reliable and convenient to popularize, can lift the generator rotor stably and can perform shaft coiling, so that the starting of the top shaft oil is avoided, the operation is simple, and the maintenance period is shortened.
The invention further aims to solve the technical problem of providing a shaft lifting support device of a nuclear power generator rotor, which comprises a front-end shaft lifting mechanism and a rear-end shaft lifting mechanism;
the front end lifting shaft mechanism comprises a first support bracket, a first roller assembly, a first power mechanism, a first adjusting piece and an adjusting compensation piece, wherein the first roller assembly is arranged on the first support bracket and can move radially relative to the first support bracket;
the first roller assemblies are symmetrically provided with two groups, each group of first roller assemblies comprises a first roller seat and a first roller matched on the first roller seat, the first adjusting piece adjusts the distance between the two first roller seats and the first support bracket so as to adjust the distance between the first roller and the front end of the rotor, and two opposite sides of the adjusting compensation piece are respectively abutted with the bottom of the first roller seat and the top of the first support bracket;
the rear end lifting shaft mechanism comprises a second support bracket, a second roller assembly arranged on the second support bracket and capable of moving radially relative to the second support bracket, a second power mechanism for jacking up the rear end of the rotor, a second adjusting piece for adjusting the interval between the second roller assembly and the second support bracket, and an adjusting compensation piece for inserting the interval between the second roller assembly and the second support bracket;
the second roller assemblies are symmetrically arranged in two groups, each group of second roller assemblies comprises a second roller seat and a second roller matched on the second roller seat, the second adjusting piece adjusts the distance between the two second roller seats and the second support bracket so as to adjust the distance between the second roller and the rear end of the rotor, and two opposite sides of the adjusting compensation piece are respectively abutted with the bottom of the second roller seat and the top of the second support bracket.
Further, in the shaft lifting support device, preferably, the rear end shaft lifting mechanism further includes a rotor shaft channeling preventing member for preventing the rotor from axially moving, the rotor shaft channeling preventing member is detachably mounted on the second support bracket, and the top end of the rotor shaft channeling preventing member abuts against the bottom of the rotor.
Further, in the shaft-lifting supporting device, preferably, the first adjusting member includes moving members disposed on left and right sides of the first roller assembly for moving the first roller assembly in a direction perpendicular to the first roller seat, and the moving members are disposed on the first supporting bracket;
the second adjusting piece comprises moving pieces which are arranged on the left side and the right side of the second roller assembly and used for enabling the second roller assembly to move along the direction perpendicular to the second roller seat, and the moving pieces are arranged on the second supporting bracket;
further, in the shaft lifting support device, preferably, the moving member is a jackscrew for screwing the first support bracket to the first roller seat and screwing the second support bracket to the second roller seat, and the jackscrew adjusts a distance between the first support bracket and the first roller seat and a distance between the second support bracket and the second roller seat.
Further, in the shaft-lifting support device, preferably, the front-end shaft-lifting mechanism further includes a first anti-channeling component for preventing the first roller component from being shifted, and the rear-end shaft-lifting mechanism further includes a second anti-channeling component for preventing the second roller component from being shifted.
Further, in the shaft lifting supporting device, preferably, the first anti-channeling component further includes a first roller seat limiting member for preventing the first roller seat from laterally shifting, the first roller seat limiting member is detachably mounted on the first supporting bracket, and a side wall of the first roller seat limiting member abuts against a side wall of the first roller seat;
the rear end lifting shaft mechanism further comprises a second roller seat limiting piece for preventing the second roller seat from transversely moving, the second roller seat limiting piece is detachably arranged on the second supporting bracket, and the side wall of the second roller seat limiting piece is in butt joint with the side walls of the first roller seat and the second roller seat.
Further, in the shaft lifting supporting device, preferably, the first anti-channeling component further comprises a third roller seat limiting piece for preventing the first roller seat from axially moving, and the third roller seat limiting piece is arranged at the front end and the rear end of the first roller seat;
the second channeling-preventing assembly further comprises a fourth roller seat limiting piece used for preventing the second roller seat from axially moving, and the fourth roller seat limiting piece is arranged at the front end and the rear end of the second roller seat.
In the shaft-raising support device, it is preferable that a plurality of mounting fixtures are provided on the first support bracket and the second support bracket, and the mounting fixtures connect the first support bracket and the second support bracket to the generator end cover.
A nuclear power generator rotor shaft lifting and coiling method comprises the following steps:
s1, removing a front lower oil baffle and a rear lower oil baffle of an end cover of the generator, and respectively mounting the lifting shaft supporting device on the front lower oil baffle and the rear lower oil baffle of the end cover of the generator;
s2, lifting the generator rotor by using a front end lifting shaft mechanism and a rear end lifting shaft mechanism in the lifting shaft supporting device;
s3, inserting a disc shaft pin into a front pair of wheel pin holes of the generator, and hanging a driving disc shaft by using a nylon sling;
s4, after the shaft is coiled, the front end shaft lifting mechanism and the rear end shaft lifting mechanism in the shaft lifting supporting device are used for putting down the generator rotor;
s5, removing the shaft lifting supporting device, and installing the front lower oil baffle and the rear lower oil baffle of the generator end cover back to the original positions.
Further, in the shaft-lifting-and-coiling method, preferably in step S1, the mounting of the shaft-lifting support device includes: and the first adjusting piece and the second adjusting piece are adjusted to enable the first roller assembly to be abutted with the first support bracket and the second roller assembly to be abutted with the second support bracket, the first support bracket and the second support bracket are fixed to the front lower oil baffle position and the rear lower oil baffle position of the generator end cover through the mounting fixing piece, and the first power mechanism and the second power mechanism are placed in the middle positions of the first support bracket and the second support bracket.
In the method for lifting the shaft and the disc shaft, preferably in step S2, the front end and the rear end of the rotor are lifted by using a first power mechanism and a second power mechanism, the first anti-channeling component and the second anti-channeling component are detached, the first adjusting piece and the second adjusting piece are adjusted to lift the first roller component and the second roller component, the first roller and the second roller are abutted against the rotor, a gap is formed between the first roller seat and the first support bracket, and between the second roller seat and the second support bracket, the adjusting piece is inserted into the gap, the first adjusting piece and the second adjusting piece are loosened, the first power mechanism and the second power mechanism are removed, the rotor falls on the first roller component and the second roller component, the first anti-channeling component and the second anti-channeling component are arranged, and the front end and the rear end of the rotor of the generator are lifted smoothly by the first roller and the second roller.
In the above-mentioned method for lifting the shaft and the disc shaft, it is preferable that in step S2, after the second power mechanism is removed, a rotor shaft-shifting preventing member is installed at the middle position of the rear-end shaft lifting mechanism, and the rotor shaft-shifting preventing member abuts against the rotor of the generator, so that the rotor is prevented from shifting to the front side.
Further, in the above-mentioned method of lifting the shaft, it is preferable that in step S2, when the generator rotor is lifted, the lifting height is required to be 0.10 to 0.50mm each time.
The beneficial effects of the invention are as follows: the lifting shaft supporting device comprises a front lifting shaft mechanism and a rear lifting shaft mechanism, wherein the front lifting shaft mechanism and the rear lifting shaft mechanism are simple in structure and convenient to assemble and disassemble, a rotor can be stably lifted and supported, the lifting shaft supporting device is safe and reliable to use and convenient to popularize, meanwhile, a disc shaft can be directly used, starting of lifting shaft oil is avoided, the operation is simple, and a large amount of main line maintenance time is saved.
The shaft lifting and coiling method has simple process and convenient operation and control of maintenance personnel; in the maintenance process, the disc-driven generator rotor does not need to start a top shaft oil pump, so that the convenience of the work of the generator rotor disc shaft and the shortening of the construction period during overhaul are realized, the maintenance activity of an oil system is withdrawn from the main line work, and a large amount of main line maintenance time is saved; the popularization value is high, the industrial safety risk is avoided, and the damage risk of precision equipment is avoided; the emergency shaft coiling function after the abnormality of the front and rear bearing oil systems of the generator is realized.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
fig. 1 is a schematic diagram of a structure in which a front end shaft lifting mechanism in embodiment 1 of the present invention lifts up the front end of a generator rotor;
fig. 2 is a schematic diagram of a structure in which a rear end shaft lifting mechanism in embodiment 1 of the present invention lifts up the rear end of a generator rotor;
FIG. 3 is a schematic front view of a front-end shaft-lifting mechanism according to embodiment 1 of the present invention;
FIG. 4 is a schematic front view of the front-end lift mechanism of embodiment 1 of the present invention (with the side of the first support bracket portion removed);
FIG. 5 is a schematic side view of a front-end shaft-lifting mechanism according to embodiment 1 of the present invention;
FIG. 6 is a schematic front view of a rear end lift mechanism according to embodiment 1 of the present invention;
FIG. 7 is a schematic view showing the front construction of a rear end lift shaft mechanism (with the side of the second support bracket portion removed) according to embodiment 1 of the present invention;
FIG. 8 is a schematic side view of a rear end lift shaft mechanism according to embodiment 1 of the present invention;
FIG. 9 is a schematic side view of a rear end shaft lifting mechanism for mounting a rotor shaft channeling prevention member according to embodiment 1 of the present invention;
fig. 10 is a schematic view of a disc pin mechanism in embodiment 2 of the present invention.
Detailed Description
For a clearer understanding of technical features, objects and effects of the present invention, a detailed description of embodiments of the present invention will be made with reference to the accompanying drawings.
An element is referred to as being "mounted" or "disposed" on another element and may be directly or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly or indirectly connected to the other element.
The directions or positions indicated by the terms "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are directions or positions based on the drawings, and are merely for convenience of description and are not to be construed as limiting the present technical solution. The terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features. The meaning of "a plurality of" is two or more, unless specifically defined otherwise.
The device is convenient to assemble and disassemble, safe, reliable and convenient to popularize, can stably lift the generator rotor 100 and can perform shaft coiling, so that starting of top shaft oil is avoided, the operation is simple, and the maintenance period is shortened.
Embodiment 1, as shown in fig. 1-9, a shaft lifting support device of a nuclear power generator rotor comprises a front end shaft lifting mechanism 1 and a rear end shaft lifting mechanism 2; the front end lifting shaft mechanism 1 comprises a first support bracket 11, a first roller assembly 12 which is arranged on the first support bracket 11 and can move radially relative to the first support bracket 11, a first power mechanism 13 for jacking the front end of the rotor 100, a first adjusting piece 14 for adjusting the interval between the first roller assembly 12 and the first support bracket 11, and an adjusting compensation piece 3 for inserting the interval between the first roller assembly 12 and the first support bracket 11; the first roller assemblies 12 are symmetrically arranged in two groups, each group of first roller assemblies 12 comprises a first roller seat 121 and a first roller 122 matched on the first roller seat 121, the first adjusting piece 14 adjusts the distance between the two first roller seats 121 and the first support bracket 11 to adjust the distance between the first roller 122 and the front end of the rotor 100, and two opposite sides of the adjusting compensation piece 3 are respectively abutted with the bottom of the first roller seat 121 and the top of the first support bracket 11; the rear end shaft lifting mechanism 2 comprises a second support bracket 21, a second roller assembly 22 which is arranged on the second support bracket 21 and can move radially relative to the second support bracket 21, a second power mechanism 23 for jacking up the rear end of the rotor 100, a second adjusting piece 24 for adjusting the interval between the second roller assembly 22 and the second support bracket 21, and an adjusting compensation piece 3 for inserting the interval between the second roller assembly 22 and the second support bracket 21; the second roller assemblies 22 are symmetrically arranged in two groups, each group of second roller assemblies 22 comprises a second roller seat 221 and a second roller 222 matched on the second roller seat 221, the second adjusting piece 24 adjusts the distance between the two second roller seats 221 and the second support bracket 21 so as to adjust the distance between the second roller 222 and the rear end of the rotor 100, and two opposite sides of the adjusting compensation piece 3 are respectively abutted with the bottom of the second roller seat 221 and the top of the second support bracket 21.
The shaft lifting supporting device comprises two split structures: the front end lifting shaft mechanism 1 and the rear end lifting shaft mechanism 2 are directly arranged on the end cover of the generator, and the front end lifting shaft mechanism 1 and the rear end lifting shaft mechanism 2 can stably lift the rotor 100 of the generator.
As shown in fig. 1, 3 to 5, the front-end lift shaft mechanism 1 includes a first support bracket 11, a first roller assembly 12, a first power mechanism 13 for lifting up the front end of the rotor 100, a first adjuster 14, and an adjustment compensator 3 for insertion between the first roller assembly 12 and the first support bracket 11.
The first support bracket 11 is a support structure of the whole front end shaft lifting mechanism 1, and can lift and support the rotor 100, so that the rotor needs to have super strong support strength, materials and specific structures are not limited, the support effect can be realized, and the rotor cannot be deformed or damaged after bearing. Preferably, the first support bracket 11 has an arc-shaped structure matched with the end cover of the generator, so that the first support bracket is convenient to install on the end cover of the generator; the first support bracket 11 is provided with a plurality of installation fixing pieces 5, the installation fixing pieces 5 connect the first support bracket 11 with the generator end cover, and the installation fixing pieces 5 can be various screw connection or plug connection fixing structures such as screws, pins, fixing blocks and the like; the first support bracket 11 is provided with a hanging ring hole 8 which can be used for lifting equipment or overturning equipment.
The first roller assemblies 12 are arranged on the first supporting bracket 11, the first roller assemblies 12 are symmetrically provided with two groups, and are respectively positioned at two sides below the front end of the rotor 100, each group of first roller assemblies 12 comprises a first roller seat 121 and first rollers 122 matched with the first roller seat 121, namely, the two sides below the front end of the rotor 100 are respectively correspondingly provided with one first roller seat 121 and one first roller 122, the two first roller seats 121 are symmetrically arranged, meanwhile, the two first rollers 122 capable of rotating on the two first roller seats 121 are symmetrically arranged, and the two groups of first roller assemblies 12 have the same structure and size, so that the centers of the two first rollers 122 are positioned on the same plane, the two first roller assemblies 12 can stably support the rotor 100, the situation that the first rollers 122 at two sides of the rotor 100 are high and low on one side is avoided, and the rotor 100 is prevented from turning on one side when the rotor 100 is supported is avoided. The first roller seat 121 may be made of 16Mn, which has high strength, and may achieve a more compact structure while meeting the load-bearing requirements, thereby saving installation space. The diameter and thickness of the first roller 122 are not specifically limited, the bearing requirement is met, the shaft diameter is not damaged, the first roller 122 can bear the axial movement of the high-pressure rotor 100, and the roller itself is not abnormal (such as scratch, copper sleeve play and the like). The first roller 122 is internally provided with two cylindrical roller bearings, the bearing capacity meets the use requirement, two sides of each bearing are limited through the sealed first roller seat 121, and the axial movement amount of the first roller 122 is smaller than 3mm. The first roller seats 121 are disposed on two sides of the first support bracket 11, preferably two inclined planes are disposed on two sides of the first support bracket 11, the first roller seats 121 are disposed on the two inclined planes, the first roller seats 121 include a baffle for preventing the first roller 122 from moving toward the center of the first support bracket 11, so that a connecting line between the center of the generator rotor 100 and the centers of the two first rollers 122 forms a certain included angle, and the stress of the two first rollers 122 is more uniform.
A planar structure is arranged on the first support bracket 11 between the two first roller assemblies 12, a first power mechanism 13 is placed on the planar structure, the first power mechanism 13 is opposite to the lower side of the generator rotor 100, the first power mechanism 13 is used for lifting and lowering the rotor 100, and the first power mechanism 13 can be a jack or other mechanical tools capable of lifting and lowering the rotor 100.
The first roller seat 121 can move radially relative to the first support bracket 11, the distance between the first roller seat 121 and the front end of the rotor 100 is adjusted by adjusting the distance between the first roller seat 121 and the first support bracket 11 by adjusting the first adjusting piece 14, when the first roller seat 121 is in an initial state and the first roller assembly 12 moves upwards integrally, a gap is formed between the first roller seat 121 and the first support bracket 11 when the first adjusting piece 14 is used for adjusting the first roller seat 12 to be in contact with the outer wall surface of the rotor 100, the adjusting compensating piece 3 is inserted into the gap to compensate the gap, so that two opposite sides of the adjusting compensating piece 3 are respectively in contact with the bottom of the first roller seat 121 and the top of the first support bracket 11, the adjusting compensating piece 3 has a certain structural strength, a plurality of adjusting compensating pieces 3 can be arranged after the weight of the first roller assembly 12 and the rotor 100 is borne, each adjusting compensating piece 3 can be arranged to be different in thickness, the adjusting compensating pieces 3 with different thicknesses are selected according to the actual situation on site, and the adjusting compensating pieces 3 can be inserted into the gap to ensure that the two sides of the rotor seat 3 have the same size, and the two sides of the rotor seat 100 can be required to have the same size, and the two sides of the rotor seat can be adjusted to have the same size, and the supporting device can be adjusted to have the size, and the supporting device 122 is required to have the stability, and the stability.
The first adjusting members 14 include moving members disposed on the left and right sides of each group of the first roller assemblies 12 for moving the first roller assemblies 12 in a direction perpendicular to the first roller seats 121, through holes are formed in the first roller seats 121, and the moving members pass through the through holes and are disposed on the first support brackets 11; specifically, the moving member is a jackscrew for screwing the first support bracket 11 to the first roller seat 121, the left side and the right side of each group of roller assemblies are respectively provided with a jackscrew, the corresponding first support bracket 11 is provided with a threaded hole, the jackscrew is installed in the threaded hole, when the jackscrew rotates clockwise, a force along the radial direction of the jackscrew is provided to jack up the first roller seat 121 so as to jack up together with the first roller 122, and when the jackscrew rotates anticlockwise, a force along the radial direction of the jackscrew is provided to put down the first roller seat 121, and the distance between the first support bracket 11 and the first roller seat 121 is adjusted by rotating the jackscrew.
The front end lifting shaft mechanism 1 further comprises a first anti-channeling component 16 for preventing the first roller component 12 from channeling, the first anti-channeling component 16 further comprises first roller seat limiting pieces 161 for preventing the first roller seat 121 from laterally channeling, the first roller seat limiting pieces 161 are arranged in pairs and respectively arranged on the first support brackets 11 at the outermost ends of the two side walls of the two first roller seats 121, the first roller seat limiting pieces 161 are detachable from the first support brackets 11, the side walls of the first roller seat limiting pieces 161 are abutted to the side walls of the first roller seat 121, the first roller seat limiting pieces 161 limit the first roller seat 121 from laterally channeling, and the first roller seat limiting pieces 161 can be various screw-in or plug-in fixing structures such as bolts, pins and fixing blocks; the first anti-channeling component 16 further includes a third roller seat limiting member 162 for preventing the first roller seat 121 from axially moving, where the third roller seat limiting member 162 is detachably mounted at the front end and the rear end of the first roller seat 121, and the third roller seat limiting member 162 may be a bolt, a pin, a fixing block, or a variety of screw or socket fixing structures.
As shown in fig. 2, 6 to 9, the rear-end lift shaft mechanism 2 includes a second support bracket 21, a second roller assembly 22, a second power mechanism 23 for lifting up the rear end of the rotor 100, a second adjuster 24, and an adjustment compensator 3 for insertion between the second roller assembly 22 and the second support bracket 21.
The second support bracket 21 is a support structure of the entire rear end shaft lifting mechanism 2, and can lift and support the rotor 100, so that the support bracket needs to have super strong support strength, materials and specific structures are not limited, can realize a support function, and can not deform or damage after bearing. Preferably, the second support bracket 21 has an arc-shaped structure matched with the generator end cover, so that the second support bracket is convenient to install on the generator rear end cover; the second support bracket 21 is provided with a plurality of installation fixing pieces 5, the installation fixing pieces 5 connect the second support bracket 21 with the generator end cover, and the installation fixing pieces 5 can be various screw connection or plug connection fixing structures such as screws, pin fixing blocks and the like; the second support bracket 21 is provided with a hanging ring hole 8 which can be used for lifting equipment or overturning equipment.
The second roller assemblies 22 are arranged on the second supporting bracket 21, the second roller assemblies 22 are symmetrically provided with two groups, and are respectively positioned at two sides below the rear end of the rotor 100, each group of second roller assemblies 22 comprises a second roller seat 221 and second rollers 222 matched with the second roller seat 221, namely, two sides below the rear end of the rotor 100 are respectively correspondingly provided with one second roller seat 221 and one second roller 222, the two second roller seats 221 are symmetrically provided, simultaneously, the two second rollers 222 capable of rotating on the two second roller seats 221 are symmetrically provided, and the two groups of second roller assemblies 22 have the same structure and size, so that the centers of the two second rollers 222 are positioned on the same plane, thereby ensuring that the two second roller assemblies 22 can stably support the rotor 100, avoiding the high side and the low side of the second rollers 222 at two sides of the rotor 100, and avoiding the occurrence of rollover of the rotor 100 when supporting the rotor 100. The second roller seat 221 can be made of 16Mn material, and has high material strength, so that a more compact structure can be obtained on the premise of meeting the bearing requirement, and the installation and use space is saved. The diameter and thickness of the second roller 222 are not particularly limited, the bearing requirement is met, the shaft diameter is not damaged, the second roller 222 can bear the axial movement of the high-pressure rotor 100, and the roller itself is not abnormal (such as scratch, copper sleeve play and the like). The second roller 222 is internally provided with two cylindrical roller bearings, the bearing capacity meets the use requirement, two sides of each bearing are limited through the sealed second roller seat 221, and the axial movement amount of the second roller 222 is smaller than 3mm. The second roller seats 221 are disposed on two sides of the second support bracket 21, preferably two inclined planes are disposed on two sides of the second support bracket 21, the second roller seats 221 are disposed on two inclined planes, the second roller seats 221 include a baffle for preventing the second roller 222 from moving toward the center of the second support bracket 21, and a certain included angle is formed between the center of the generator rotor 100 and the center of the two second rollers 222, so that the stress of the two second rollers 222 is more uniform.
A planar structure is arranged on the second support bracket 21 between the two second roller assemblies 22, a second power mechanism 23 is arranged on the planar structure, the second power mechanism 23 is opposite to the lower part of the generator rotor 100, the second power mechanism 23 is used for lifting and lowering the rotor 100, and the second power mechanism 23 can be a jack or other mechanical tools capable of lifting and lowering the rotor 100.
The second roller seat 221 can move radially relative to the second support bracket 21, the distance between the second roller seat 221 and the rear end of the rotor 100 is adjusted by adjusting the distance between the second roller seat 221 and the second support bracket 21 by adjusting the second adjusting piece 24, when the second roller seat 221 is in an initial state and the second roller assembly 22 moves upwards integrally, a gap is formed between the second roller seat 221 and the second support bracket 21, when the outer wall surface of the second roller seat 222 is in contact with the outer wall surface of the rotor 100, the adjusting compensating piece 3 is inserted into the gap to compensate the gap, so that two opposite sides of the adjusting compensating piece 3 are respectively in contact with the bottom of the second roller seat 221 and the top of the second support bracket 21, the adjusting compensating piece 3 has a certain structural strength, and can not be damaged after bearing the weight of the second roller assembly 22 and the rotor 100, each adjusting compensating piece 3 can be set to be different thicknesses, different adjusting compensating pieces 3 can be selected according to the actual situations, the two sides of the adjusting compensating piece 3 can be inserted into the gap, and the two sides of the second compensating piece 3 can be inserted into the second supporting device 222 and the same in size, and the horizontal stability of the rotor 100 can be guaranteed.
The second adjusting members 24 include moving members disposed on the left and right sides of each set of second roller assemblies 22 for moving the second roller assemblies 22 in a direction perpendicular to the second roller seats 221, through holes are formed in the second roller seats 221, and the moving members are disposed on the second support brackets 21 through the through holes; specifically, the moving member is a jackscrew that connects the second support bracket 21 with the second roller seat 221 in a threaded manner, the left and right sides of each group of roller assemblies are respectively provided with a jackscrew, the corresponding second support bracket 21 is provided with a threaded hole, the jackscrew is installed in the threaded hole, when the jackscrew rotates anticlockwise, a force along the axial direction of the jackscrew is provided to jack up the second roller seat 221, and when the jackscrew rotates clockwise, a force along the axial direction of the jackscrew is provided to put down the second roller seat 221, and the distance between the second support bracket 21 and the second roller seat 221 is adjusted by rotating the jackscrew.
The rear end lifting shaft mechanism 2 further comprises a second anti-channeling component 26 for preventing the second roller component 22 from channeling, the second anti-channeling component 26 further comprises second roller seat 221 limiting pieces for preventing the second roller seat 221 from laterally channeling, the second roller seat 221 limiting pieces are arranged in pairs and respectively arranged on the second support brackets 21 on two side walls of the two second roller seats 221, the second roller seat 221 limiting pieces are detachable from the second support brackets 21, the side walls of the second roller seat 221 limiting pieces are abutted to the side walls of the second roller seat 221, the second roller seat 221 limiting pieces limit the second roller seat 221 to prevent the second roller seat 221 from laterally channeling, and the second roller seat 221 limiting pieces can be various screw-connected or inserted fixed structures such as bolts, pins and fixed blocks; the second anti-channeling component 26 further includes a fourth roller seat limiting member 262 for preventing the second roller seat 221 from axially moving, where the fourth roller seat limiting member 262 is detachably mounted at the front end and the rear end of the second roller seat 221, and the fourth roller seat limiting member 262 may be a bolt, a pin, a fixing block, or a variety of screw-connection or plug-connection fixing structures. As shown in fig. 9, the rear end shaft lifting mechanism 2 further includes a rotor shaft channeling preventing member 25 for preventing the rotor 100 from axially moving, the rotor shaft channeling preventing member 25 is detachably mounted on the second support bracket 21, the top end of the rotor shaft channeling preventing member 25 is abutted to the bottom of the rotor 100, and since the second power mechanism 23 lifts the generator rotor 100, the rotor 100 lifts rearward, i.e. the rear side is high, when the generator rotor 100 is driven, the rotor 100 moves forward, in order to prevent the rotor 100 from axially moving, the second power mechanism 23 is removed, the rotor shaft channeling preventing member 25 is mounted on the second support bracket 21, the rotor shaft channeling preventing member 25 includes a radially arranged support portion 251 and a channeling preventing portion 252 connected with the support portion, the channeling preventing portion 252 may be in a slant structure, the top of the channeling preventing portion 252 is abutted to the bottom of the rotor 100, and the channeling preventing portion 252 provides a rearward pulling force to the rotor 100, so that the rotor 100 is stably supported, and the disc shaft is smoothly driven.
Embodiment 2, a nuclear power generator rotor shaft lifting and coiling method comprises the following steps:
s1, removing a front lower oil baffle and a rear lower oil baffle of a generator end cover, respectively mounting the shaft lifting support device on the front lower oil baffle and the rear lower oil baffle of the generator end cover, mounting a front shaft lifting mechanism 1 on the front lower oil baffle of the generator end cover, and mounting a rear shaft lifting mechanism 2 on the rear lower oil baffle of the generator end cover;
the installation of the lifting shaft supporting device comprises the following steps: the first and second adjusting members 14 and 24 are adjusted to enable the first roller assembly 12 to be abutted against the first support bracket 11 and the second roller assembly 22 to be abutted against the second support bracket 21, which means that no gap or small gap exists between the first roller seat 121 and the first support bracket 11 and between the second roller seat 221 and the second support bracket 21, so that the first support bracket 11 and the second bracket are more convenient to install on the generator end cover, the first support bracket 11 and the second support bracket 21 are fixed to the front lower gear oil position and the rear lower gear oil position of the generator end cover through the installation fixing member 5, and the first and second power mechanisms 23 are placed at the middle positions of the first support bracket 11 and the second support bracket 21.
S2, lifting the generator rotor 100 by using a front end lifting shaft mechanism 1 and a rear end lifting shaft mechanism 2 in the lifting shaft supporting device: the front end of the rotor 100 and the rear end of the rotor 100 are lifted by using the first power mechanism 13 and the second power mechanism 23, the first channeling preventing assembly 16 and the second channeling preventing assembly 26 are dismounted, the first adjusting piece 14 and the second adjusting piece 24 are adjusted to lift the first roller assembly 12 and the second roller assembly 22, so that the first roller 122 and the second roller 222 are lifted until the first roller 122 and the second roller 222 are abutted against the rotor 100, at this time, a gap is formed between the first roller seat 121 and the first supporting bracket 11, the second roller seat 221 and the second supporting bracket 21, an adjusting compensating piece 3 with a proper thickness is selected to be inserted into the gap, the sizes and the specifications of the adjusting compensating pieces 3 inserted under the first roller seat 121 and the second roller seat 221 are required to be the same, the rotor 100 is prevented from being horizontally deflected due to the different sizes and specifications of the adjusting compensating pieces 3 when the rotor 100 falls on the first roller 122 and the second roller 222, avoiding the side turning of the rotor 100, then loosening the first adjusting piece 14 and the second adjusting piece 24 to enable the first roller seat 121 and the second roller seat 221 to fall, removing the first power mechanism 13 and the second power mechanism 23, enabling the rotor 100 to fall on the first roller 122 and the second roller 222 on the first roller component 12 and the second roller component 22, enabling the first roller 122 and the second roller 222 to be pressed on the adjusting compensation piece 3 by the first supporting bracket 11 and the second supporting bracket 21, and then installing the first anti-channeling component 16 and the second anti-channeling component 26 to prevent the first roller component 12 and the second roller component 22 from being shifted after being stressed, enabling the first roller 122 and the second roller 222 to stably lift the front end and the rear end of the generator rotor 100, and requiring a lifting height of 0.10-0.50mm each time when the generator rotor 100 is lifted so as to enable enough space to be needed for the subsequent disc shaft work; after the removal of the second power mechanism 23, the rotor shaft-shifting preventing member 25 needs to be mounted on the second support bracket 21 at the intermediate position of the rear-end shaft-lifting mechanism 2, and the rotor shaft-shifting preventing member 25 abuts against the generator rotor 100 to prevent the rotor 100 from shifting forward.
S3, inserting a disc shaft pin 200 into a front pair of wheel pin holes of the generator, and hanging a driving disc shaft by using a nylon sling;
as shown in fig. 10, a brass bushing of 6mm is additionally installed on the outer surface of the disc pin 200, and the brass bushing is positioned to contact the rear pair of wheel pin holes of the generator rotor 100, so that the inner walls of the pin holes are not damaged when being stressed. The front end of the coiling pin 200 can be threaded with a steel wire rope or a sling for coiling.
S4, after the shaft is coiled, the front-end shaft lifting mechanism 1 and the rear-end shaft lifting mechanism 2 in the shaft lifting supporting device are used for putting down the generator rotor 100;
s5, removing the lifting shaft supporting device, and installing the front end lower oil baffle and the rear end lower oil baffle of the generator end cover back to the original positions.
The following is a detailed description by taking the Yangjiang nuclear power QFSN-1100-4 generator total inspection overhaul period as an example:
the shaft lifting supporting device is directly arranged on the front and rear lower gear oil positions of the generator end cover, and the shaft lifting supporting device comprises: adopt Q235 material preparation, weld according to national welding standard, all welded junctions are full-welded, stable in structure is durable, and the support nature is strong, and front end lifts the size of axle mechanism 1 and is 1400mm×245mm×600mm, but the lifting altitude scope is: 0.01-10mm; the rear end lifting shaft mechanism 2 has the dimensions of 1400mm multiplied by 245mm multiplied by 600mm, and the lifting height range is as follows: 0.01-10mm; the rated bearing weight is 200T (the total weight of the generator rotor 100 is 185T), and the design is short, small and light, and the disassembly and the assembly are convenient; the first roller 122 and the second roller 222 have an outer diameter phi 240mm and a thickness of 35mm.
The specific installation steps of the shaft lifting support device and the method steps of using the shaft lifting support device to carry out the shaft coiling of the generator rotor 100 are detailed in the specific steps in the embodiment 2, and are not repeated here, the total time spent for the shaft coiling, the shaft lifting and the full inspection overhaul of the generator rotor 100 is 800 hours, and compared with the prior art, the method steps of using the shaft lifting support device to carry out the shaft coiling of the generator rotor 100 are shortened by about 13.5 hours.
The method for lifting the shaft and the coiling of the nuclear power generator rotor 100 is simple in process and convenient for maintenance personnel to operate, particularly, the problems that the lifting shaft supporting device is required to be started to carry out the coiling of the generator rotor 100 are solved by researching, developing and implementing the lifting shaft supporting device, so that the lifting shaft oil pump is not required to be started to drive the generator rotor 100 in the maintenance process, the convenience of the coiling work of the generator rotor 100 in the overhaul is realized, the maintenance activity of an oil system is withdrawn from the main line work, and a large amount of main line maintenance time is saved; the emergency shaft coiling function after the abnormality of the front and rear bearing oil systems of the generator is realized; meanwhile, the method for lifting the shaft and the shaft lifting support device are put into use, so that the industrial safety risk and the bearing bush black-gold surface damage risk caused by adopting a direct shaft lifting method are avoided, the safety of precision equipment is protected, the operation steps of personnel are greatly simplified, and the popularization value is high.

Claims (13)

1. The shaft lifting supporting device of the nuclear power generator rotor is characterized by comprising a front-end shaft lifting mechanism (1) and a rear-end shaft lifting mechanism (2);
the front end lifting shaft mechanism (1) comprises a first support bracket (11), a first roller assembly (12) arranged on the first support bracket (11) and capable of radially moving relative to the first support bracket (11), a first power mechanism (13) for jacking the front end of the rotor (100), a first adjusting piece (14) for adjusting the interval between the first roller assembly (12) and the first support bracket (11), and an adjusting compensation piece (3) for inserting the interval between the first roller assembly (12) and the first support bracket (11);
the first roller assemblies (12) are symmetrically arranged in two groups, each group of first roller assemblies (12) comprises a first roller seat (121) and a first roller (122) matched with the first roller seat (121), the first adjusting piece (14) adjusts the distance between the two first roller seats (121) and the first support bracket (11) so as to adjust the distance between the first roller (122) and the front end of the rotor (100), and two opposite sides of the adjusting compensation piece (3) are respectively abutted with the bottom of the first roller seat (121) and the top of the first support bracket (11);
the rear end lifting shaft mechanism (2) comprises a second support bracket (21), a second roller assembly (22) which is arranged on the second support bracket (21) and can move radially relative to the second support bracket (21), a second power mechanism (23) for jacking the rear end of the rotor (100), a second adjusting piece (24) for adjusting the interval between the second roller assembly (22) and the second support bracket (21), and an adjusting compensation piece (3) for inserting the interval between the second roller assembly (22) and the second support bracket (21);
the second roller assemblies (22) are symmetrically arranged in two groups, each group of second roller assemblies (22) comprises a second roller seat (221) and a second roller (222) matched with the second roller seat (221), the distance between the second roller seats (221) and the second support bracket (21) is adjusted by the second adjusting piece (24) so as to adjust the distance between the second roller (222) and the rear end of the rotor (100), and two opposite sides of the adjusting compensation piece (3) are respectively abutted to the bottom of the second roller seat (221) and the top of the second support bracket (21).
2. The shaft lifting support device of a nuclear power generator rotor according to claim 1, wherein the rear end shaft lifting mechanism (2) further comprises a rotor shaft channeling preventing member (25) for preventing the rotor (100) from axially moving, the rotor shaft channeling preventing member (25) is detachably mounted on the second support bracket (21), and the top end of the rotor shaft channeling preventing member (25) is abutted with the bottom of the rotor (100).
3. The lift shaft supporting device of a nuclear power generator rotor according to claim 1, wherein the first adjusting member (14) comprises moving members arranged on the left and right sides of the first roller assembly (12) for moving the first roller assembly (12) in a direction perpendicular to the first roller seat (121), the moving members being arranged on the first supporting bracket (11);
the second adjusting member (24) comprises moving members which are arranged on the left side and the right side of the second roller assembly (22) and used for enabling the second roller assembly (22) to move along the direction perpendicular to the second roller seat (221), and the moving members are arranged on the second supporting bracket (21).
4. A lifting shaft supporting device of a nuclear power generator rotor according to claim 3, characterized in that the moving member is a jackscrew for screwing the first supporting bracket (11) with the first roller seat (121) and screwing the second supporting bracket (21) with the second roller seat (221), and the jackscrew adjusts the interval between the first supporting bracket (11) and the first roller seat (121) and the interval between the second supporting bracket (21) and the second roller seat (221).
5. The lift shaft support device of a nuclear power generator rotor according to claim 1, wherein the front end lift shaft mechanism (1) further comprises a first anti-channeling component (16) for preventing the first roller component (12) from being shifted, and the rear end lift shaft mechanism (2) further comprises a second anti-channeling component (26) for preventing the second roller component (22) from being shifted.
6. The lift shaft support device of a nuclear power generator rotor according to claim 5, wherein the first anti-channeling component (16) further comprises a first roller seat limiting piece (161) for preventing the first roller seat (121) from laterally shifting, the first roller seat limiting piece (161) is detachably mounted on the first support bracket (11), and a side wall of the first roller seat limiting piece (161) is abutted against a side wall of the first roller seat (121);
the rear end lifting shaft mechanism (2) further comprises a second roller seat limiting piece (261) for preventing the second roller seat (221) from transversely moving, the second roller seat limiting piece (261) is detachably arranged on the second support bracket (21), and the side wall of the second roller seat limiting piece (261) is in butt joint with the side walls of the first roller seat (121) and the second roller seat (221).
7. The lift shaft support device of a nuclear power generator rotor according to claim 5 or 6, wherein the first anti-channeling component (16) further comprises a third roller seat limiting member (162) for preventing the first roller seat (121) from axially shifting, the third roller seat limiting member (162) being disposed at front and rear ends of the first roller seat (121);
the second channeling-preventing assembly (26) further comprises a fourth roller seat limiting piece (262) for preventing the second roller seat (221) from axially moving, and the fourth roller seat limiting piece (262) is arranged at the front end and the rear end of the second roller seat (221).
8. The shaft lifting support device of a nuclear power generator rotor according to claim 1, wherein a plurality of mounting fixtures (5) are arranged on the first support bracket (11) and the second support bracket (21), and the mounting fixtures (5) connect the first support bracket (11) and the second support bracket (21) with a generator end cover.
9. The shaft lifting and coiling method for the nuclear power generator rotor is characterized by comprising the following steps of:
s1, removing a front lower oil baffle and a rear lower oil baffle of an end cover of a generator, and respectively installing the lifting shaft supporting device according to any one of claims 1-8 on the front lower oil baffle and the rear lower oil baffle of the end cover of the generator;
s2, lifting the generator rotor (100) by using a front end lifting shaft mechanism (1) and a rear end lifting shaft mechanism (2) in the lifting shaft supporting device;
s3, inserting a disc shaft pin into a front pair of wheel pin holes of the generator, and hanging a driving disc shaft by using a nylon sling;
s4, after the shaft is coiled, the front end shaft lifting mechanism (1) and the rear end shaft lifting mechanism (2) in the shaft lifting supporting device are used for putting down the generator rotor (100);
s5, removing the shaft lifting supporting device, and installing the front lower oil baffle and the rear lower oil baffle of the generator end cover back to the original positions.
10. The nuclear power generator rotor lift shaft and spool method of claim 9 wherein in step S1, the mounting of the lift shaft support means comprises: the first adjusting piece (14) and the second adjusting piece (24) are adjusted to enable the first roller assembly (12) to be in butt joint with the first support bracket (11), the second roller assembly (22) to be in butt joint with the second support bracket (21), the first support bracket (11) and the second support bracket (21) are fixed to the front lower gear oil position and the rear lower gear oil position of the generator end cover through the mounting fixing piece (5), and the first power mechanism (13) and the second power mechanism (23) are placed at the middle positions of the first support bracket (11) and the second support bracket (21).
11. The method according to claim 9, wherein in step S2, the front end of the rotor (100) and the rear end of the rotor (100) are lifted by using the first power mechanism (13) and the second power mechanism (23), the first anti-channeling component (16) and the second anti-channeling component (26) are detached, the first adjusting member (14) and the second adjusting member (24) are adjusted to lift the first roller component (12) and the second roller component (22), the first roller (122) and the second roller (222) are abutted to the rotor (100), a gap is formed between the first roller seat (121) and the first support bracket (11) and between the second roller seat (221) and the second support bracket (21), the first adjusting member (14) and the second adjusting member (24) are loosened by using the adjusting compensation member (3), the first power mechanism (13) and the second power mechanism (23) are removed, the rotor (100) is dropped on the first roller component (12) and the second roller component (22), and the first roller seat (121) and the second roller seat (26) are lifted, and the front end of the first roller component (16) and the second roller seat (222) are lifted smoothly.
12. The nuclear power generator rotor shaft-up and shaft-down method according to claim 9, characterized in that in step S2, after the second power mechanism (23) is removed, a rotor shaft-up preventing member (25) is installed at the middle position of the rear-end shaft-up mechanism (2), and the rotor shaft-up preventing member (25) abuts against the generator rotor (100) to prevent the rotor (100) from moving forward.
13. The nuclear power generator rotor shaft-to-shaft method of claim 9 wherein in step S2, the generator rotor (100) is lifted, requiring a lift height of 0.10-0.50mm each time.
CN202210072703.XA 2022-01-21 2022-01-21 Nuclear power generator rotor shaft lifting and coiling method and shaft lifting support device thereof Active CN114915116B (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0051178A1 (en) * 1980-10-27 1982-05-12 Carrier Corporation Assembly and disassembly methods and apparatus
CN201357393Y (en) * 2009-02-10 2009-12-09 李伟钢 Special hydraulic bearing uplifting tool used for installation and overhaul of thermal generator set
CN113346698A (en) * 2020-05-25 2021-09-03 阳江核电有限公司 Method and tool for treating generator maintenance end cover without pumping rotor

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0051178A1 (en) * 1980-10-27 1982-05-12 Carrier Corporation Assembly and disassembly methods and apparatus
CN201357393Y (en) * 2009-02-10 2009-12-09 李伟钢 Special hydraulic bearing uplifting tool used for installation and overhaul of thermal generator set
CN113346698A (en) * 2020-05-25 2021-09-03 阳江核电有限公司 Method and tool for treating generator maintenance end cover without pumping rotor

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* Cited by examiner, † Cited by third party
Title
转动设备抬轴装置的设计与应用;纪田宇;;设备管理与维修;20181125(22);全文 *

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