CN114448183A - Core-pulling and core-penetrating overall assembly method for generator rotor - Google Patents
Core-pulling and core-penetrating overall assembly method for generator rotor Download PDFInfo
- Publication number
- CN114448183A CN114448183A CN202210145875.5A CN202210145875A CN114448183A CN 114448183 A CN114448183 A CN 114448183A CN 202210145875 A CN202210145875 A CN 202210145875A CN 114448183 A CN114448183 A CN 114448183A
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- core
- rotor
- pulling
- stator
- penetrating
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- 238000000034 method Methods 0.000 title claims abstract description 42
- 230000000903 blocking effect Effects 0.000 claims abstract description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 6
- 230000008093 supporting effect Effects 0.000 claims description 11
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 5
- 229910052799 carbon Inorganic materials 0.000 claims description 5
- 230000001681 protective effect Effects 0.000 claims description 2
- 230000000712 assembly Effects 0.000 claims 1
- 238000000429 assembly Methods 0.000 claims 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- 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
Abstract
The invention relates to the technical field of assembly of hydraulic generators, and provides a core-pulling and core-penetrating integral assembly method for a generator rotor, aiming at solving the problem that potential safety hazards are increased by adopting a scheme of simultaneously hoisting a rotor and a stator in the prior art, wherein the core-pulling and core-penetrating integral assembly method for the generator rotor comprises the following steps: removing all parts of the rotating part of the water turbine; dismantling blocking parts at the front end of a thrust bearing of the generator; removing the thrust bearing bush, the thrust bearing block and the thrust disc, and fixing a rotating part; removing the blocking part in front of the rotating part; removing a large shaft blocking part of the rotating part; mounting rotor tools at two ends of a rotor, and preparing for crane lifting of a factory building; the stator is jacked upwards, and the rotor is hoisted upwards by the travelling crane; starting the core pulling of the rotor, and removing the stator of the engine rotor from the horizontal direction; completely drawing out the rotor from the inner hole of the stator and hoisting the rotor to an overhaul room; the rotating part is checked to have no damage in the overhaul room, and the core-pulling and core-penetrating reverse process of the rotor is guaranteed.
Description
Technical Field
The invention relates to the technical field of assembly of hydraulic generators, in particular to a core-pulling and core-penetrating integral assembly method for a generator rotor.
Background
In recent years, under the policy that the demand for clean energy is continuously increased at home and abroad, more and more hydropower stations are invested and constructed, and in order to enable investors to obtain greater income, the investment return rate and the investment cost recovery time are considered when investment is carried out. Considering that the investment cost is saved and controlled, the design height of the factory building and the strength of the girder of the traveling crane of the factory building need to be reduced. When the hydraulic generator set is designed, the height of the whole bearing and the center of the set is reduced at first, so that the height of the whole set is reduced, and the height of a workshop can be reduced. In the prior art, the hydraulic generator is partially sunk into the ground of a factory building for installation, so that the height of the hydraulic generator exposed out of the ground is reduced, and the purpose of reducing the height of the factory building is achieved. Then after the hydro-generator is partially sunk into the ground for installation, when the core-pulling and core-penetrating assembly of the generator rotor is carried out, the stator and the rotor of the hydro-generator need to be lifted simultaneously, the installation and the lifting of the unit in a plant can be influenced, great personnel safety hidden dangers exist, meanwhile, the investment cost of a hydropower station is greatly increased, and the problems of reduction of investment income, too long investment return and the like are caused.
Disclosure of Invention
The invention aims to provide a core-pulling core-penetrating overall assembly method for a generator rotor, and aims to solve the problem that potential safety hazards are increased due to the fact that a scheme that a rotor and a stator are hoisted simultaneously is adopted in core-pulling core-penetrating of the generator rotor in the prior art.
The basic scheme provided by the invention is as follows: a core-pulling and core-penetrating integral assembling method for a generator rotor comprises the following steps:
s1, removing all parts of the rotating part of the water turbine;
s2, removing blocking parts at the front end of a thrust bearing of the generator;
s3, removing the thrust bearing bush, the thrust bearing seat and the thrust disc, and fixing the rotating part;
s4, removing the front blocking part of the rotating part;
s5, removing the large shaft blocking parts of the rotating part;
s6, mounting rotor tools at two ends of the rotor, and preparing for crane lifting of the factory building;
s7, jacking the stator upwards, and meanwhile, lifting the rotor upwards by the travelling crane, so that the height of the center of the stator is not less than the height from the center of the rotor to the floor;
s8, starting to loose the core of the rotor, and removing the stator of the engine rotor from the horizontal direction;
s9, completely drawing the rotor out of the inner hole of the stator and hoisting the rotor to an overhaul room;
s10, the rotating part is checked to have no damage in the overhaul room, and the core-pulling and core-penetrating reverse process of the rotor is guaranteed.
The basic scheme has the beneficial effects that: compared with the assembling method in the prior art, in the scheme, a new hoisting scheme is adopted, when the rotor is subjected to core pulling and punching, only the stator part needs to be lifted, and when the rotor is hoisted, only the rotor part needs to be hoisted, compared with the mode of integrally hoisting the stator and the rotor part, the scheme reduces the part needing to be hoisted, the height needing to be hoisted can be reduced, the potential safety hazard of personnel in the installation and play process is reduced, the generator operation high layer is reduced, meanwhile, the investment cost of the power station is greatly reduced, and the advantages of increasing the investment income, shortening the investment return time and the like are achieved.
In S2, the blocking component at the front end of the thrust bearing includes a slip ring, a brush holder, a flywheel, a brake, and a cover. Has the advantages that: in this scheme, can guarantee that the thrust bearing front end is unimpeded after dismantling spare parts such as collecting ring, brush yoke, conveniently carry out subsequent operation.
Further, in S3, before fixing the rotating part, a protective pad is filled in the air gap inside the core. Has the advantages that: in this scheme, the packing of protection pad can protect the iron core to assembly quality is reliable and stable has been guaranteed.
Further, the protection pad is thick felt. Has the advantages that: the thick felt is a common material, is easy to obtain, has good adhesive property, is not easy to loosen, can be punched into parts with various shapes, and can be better attached to an air gap inside the iron core.
Further, in S4, the rotating-section front obstructing member includes a front and rear air guiding duct and a front and rear end cover. Has the advantages that: in this scheme, can guarantee that rotation part the place ahead is unimpeded after demolising front and back guide duct and front and back end shield, conveniently carry out subsequent operation.
Further, in S5, the rotating part large shaft blocking component includes a guide bearing upper cover, a guide bearing upper shoe, and a grounding carbon brush. Has the advantages that: in this scheme, can guarantee that the big axle of rotating part does not have the hindrance after will leading bearing upper cover, leading bearing upper tile and ground connection carbon brush demolish, conveniently carry out subsequent operation.
Further, in S7, the stator is lifted up by the support members installed at both sides of the front and rear rings of the stator frame. Has the advantages that: in this scheme, the cost of labor can be reduced to the mode that utilizes supporting component jack-up stator upwards.
Further, the supporting component comprises a supporting plate and a jack arranged at a position below the supporting plate. Has the advantages that: in this scheme, utilize backup pad and jack to realize the jack-up that makes progress of stator, simple structure.
Furthermore, two groups of supporting components are arranged on two sides of the front ring and the rear ring of the stator base. Has the advantages that: in this scheme, the supporting effect to the stator has been guaranteed in setting up of two sets of supporting components to the smooth going on of assembly has been guaranteed.
Further, in S1, the stator is further padded up between the stator frame and the bottom plate by a padding plate in the process of lifting up the stator. Has the beneficial effects that: in this scheme, the setting of backing plate can guarantee the stator in the firm of the in-process that rises to the smooth going on of assembly has been guaranteed.
Drawings
FIG. 1 is a schematic view of S1 in an embodiment of a core-pulling and piercing integral assembling method for a generator rotor according to the invention;
FIG. 2 is a schematic view of S2 in an embodiment of the core-pulling and piercing integral assembling method for the generator rotor according to the invention;
FIG. 3 is a schematic view of S3 in an embodiment of the core-pulling and piercing integral assembling method for the generator rotor according to the invention;
FIG. 4 is a schematic view of S4 in an embodiment of the core-pulling and piercing integral assembling method for the generator rotor according to the invention;
FIG. 5 is a schematic view of S5 in an embodiment of the core-pulling and piercing integral assembling method for the generator rotor according to the invention;
FIG. 6 is a schematic view of S6 in an embodiment of the core-pulling and piercing integral assembling method for the generator rotor according to the invention;
FIG. 7 is a schematic view of S7 in an embodiment of the core-pulling and piercing integral assembling method for the generator rotor according to the invention;
FIG. 8 is a schematic view of S8 in an embodiment of the core-pulling and piercing integral assembling method for the generator rotor according to the invention;
FIG. 9 is a schematic view of S9 in an embodiment of the core-pulling and piercing integral assembling method for the generator rotor according to the invention;
FIG. 10 is a schematic view of an embodiment of a core-pulling and piercing integral assembling method of a generator rotor according to the invention at S10;
fig. 11 is a schematic flow chart of an embodiment of a core-pulling and piercing integral assembly method for a generator rotor according to the present invention.
Detailed Description
The following is further detailed by way of specific embodiments:
reference numerals in the drawings of the specification include: all parts 1 of a rotating part of the water turbine, a collecting ring 2, a brush holder 3, a flywheel 4, a brake 5, a cover 6, a thrust bearing bush 7, a thrust bearing seat 8, a thrust disc 9, an iron core inner wall 10, a front air duct and a rear air duct 11, a front end cover and a rear end cover 12, a guide bearing upper cover 13, a guide bearing upper bush 14, a grounding carbon brush 15, a rotor hoisting tool 16, a hoisting rope 17, a balance beam 18, a stator base front ring and rear ring 19, a support plate 20, a jack 21, a support 22, a stator 23 and a rotor 24.
The embodiments are substantially as shown in figures 1 to 11 of the accompanying drawings: a core-pulling and core-penetrating integral assembling method for a generator rotor comprises the following steps:
s1, removing all parts 1 of the rotating part of the water turbine, and ensuring that the water turbine and the generator are completely separated;
s2, removing blocking parts at the front end of the thrust bearing of the generator, wherein the blocking parts comprise parts such as a collecting ring 2, a brush holder 3, a flywheel 4, a brake 5, a cover 6 and the like, and the front end of the thrust bearing is guaranteed to be free of the blocking parts;
s3, removing the thrust bearing shoe 7, the thrust bearing seat 8 and the thrust disc 9, and filling a protection pad between air gaps of the inner wall 10 of the iron core for protection, wherein in the embodiment, the protection pad adopts 1 layer of thick felt with the thickness of 2 mm, and a rotating part is fixed well;
s4, removing front blocking parts of the rotating part, including the front and rear air guide cylinders 11 and the front and rear end covers 12, and ensuring that the front blocking parts of the rotating part are not blocked;
s5, removing the large shaft blocking parts of the rotating part, wherein the large shaft blocking parts comprise a guide bearing upper cover 13, a guide bearing upper tile 14 and a grounding carbon brush 15, and the large shaft blocking parts of the rotating part are guaranteed to be free;
s6, mounting rotor tools 16 on two ends of the rotor 24 to connect long shafts, and preparing the lifting ropes 17, the balance beams 18 and the travelling crane of the power station factory building in place;
s7, lifting the stator 23 upward, lifting the rotor 24 upward by the crane, and finally making the height of the center of the stator 23 not less than the height from the center of the rotor 24 to the floor surface, specifically, welding 2 support plates 20 on both sides of the front and rear rings 19 of the stator base, arranging 1 jack 21 with sufficient bearing capacity at the position below each 1 support plate 20, lifting the stator support 22 upward by the jack 21, lifting the rotor 24 upward by the crane, lifting the stator 23, and lifting the stator 23 between the base of the stator 23 and the floor by the backing plate while lifting the stator 23, and repeating the process, and finally making the height of the center of the stator 23 more than or equal to the height from the center of the rotor 24 to the floor surface;
s8, fixing the stator 23 firmly, starting to loose the core of the rotor 24, removing the stator 23 from the engine rotor 24 from the horizontal direction, and plugging the lower part of the rotor 24 tightly by using a skid when the lifting point of the lifting rope 17 is changed;
s9, completely drawing out the rotor 24 from the inner hole of the stator 23 and hoisting the rotor to an overhaul room;
s10, the rotating part is checked to have no damage in the overhaul room, and the core-pulling and core-penetrating reverse process of the rotor 24 is ensured.
The foregoing is merely an example of the present invention, and common general knowledge in the field of known specific structures and characteristics is not described herein in any greater extent than that known in the art at the filing date or prior to the priority date of the application, so that those skilled in the art can now appreciate that all of the above-described techniques in this field and have the ability to apply routine experimentation before this date can be combined with one or more of the present teachings to complete and implement the present invention, and that certain typical known structures or known methods do not pose any impediments to the implementation of the present invention by those skilled in the art. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.
Claims (10)
1. A core-pulling and core-penetrating integral assembling method for a generator rotor is characterized by comprising the following steps: the method comprises the following steps:
s1, removing all parts of the rotating part of the water turbine;
s2, removing blocking parts at the front end of a thrust bearing of the generator;
s3, removing the thrust bearing bush, the thrust bearing seat and the thrust disc, and fixing the rotating part;
s4, removing the front blocking part of the rotating part;
s5, removing the large shaft blocking parts of the rotating part;
s6, mounting rotor tools at two ends of the rotor, and preparing for crane lifting of the factory building;
s7, jacking the stator upwards, and meanwhile, lifting the rotor upwards by the travelling crane, so that the height of the center of the stator is not less than the height from the center of the rotor to the floor;
s8, starting core pulling of the rotor, and removing the stator of the engine rotor from the horizontal direction;
s9, completely drawing the rotor out of the inner hole of the stator and hoisting the rotor to an overhaul room;
s10, the rotating part is checked to have no damage in the overhaul room, and the core-pulling and core-penetrating reverse process of the rotor is guaranteed.
2. The core-pulling core-penetrating overall assembling method of the generator rotor according to claim 1, characterized in that: in S2, the blocking component at the front end of the thrust bearing includes a slip ring, a brush holder, a flywheel, a brake, and a cover.
3. The generator rotor core-pulling core-penetrating overall assembly method according to claim 1 or 2, characterized in that: at S3, before fixing the rotating part, a protective pad is filled in the air gap inside the core.
4. The core-pulling core-penetrating overall assembling method of the generator rotor according to claim 3, characterized in that: the protection pad is thick felt.
5. The generator rotor core-pulling core-penetrating overall assembly method according to claim 4, characterized in that: in S4, the rotating-part front obstructing member includes a front and rear air guiding duct and a front and rear end cover.
6. The core-pulling core-penetrating overall assembling method of the generator rotor according to claim 5, characterized in that: in S5, the large shaft blocking component of the rotating part includes a guide bearing upper cover, a guide bearing upper shoe and a grounding carbon brush.
7. The generator rotor core-pulling core-penetrating overall assembly method according to claim 6, characterized in that: in S7, the stator is lifted up by the support members installed at both sides of the front and rear rings of the stator frame.
8. The generator rotor core-pulling core-penetrating overall assembly method according to claim 7, characterized in that: the supporting component comprises a supporting plate and a jack arranged at the position below the supporting plate.
9. The generator rotor core-pulling core-penetrating overall assembly method according to claim 8, characterized in that: two groups of supporting assemblies are arranged on two sides of the front ring and the rear ring of the stator base.
10. The core-pulling core-penetrating overall assembling method of the generator rotor according to claim 9, characterized in that: in S1, the stator is further cushioned by a cushion plate between the stator frame and the bottom plate in the process of lifting the stator upward.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210145875.5A CN114448183A (en) | 2022-02-17 | 2022-02-17 | Core-pulling and core-penetrating overall assembly method for generator rotor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210145875.5A CN114448183A (en) | 2022-02-17 | 2022-02-17 | Core-pulling and core-penetrating overall assembly method for generator rotor |
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| Publication Number | Publication Date |
|---|---|
| CN114448183A true CN114448183A (en) | 2022-05-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210145875.5A Pending CN114448183A (en) | 2022-02-17 | 2022-02-17 | Core-pulling and core-penetrating overall assembly method for generator rotor |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN103683709A (en) * | 2012-09-18 | 2014-03-26 | 上海宝冶集团有限公司 | Quick lifting method for online drawing rotor of large motor |
| CN206517253U (en) * | 2017-03-08 | 2017-09-22 | 阳江核电有限公司 | A kind of nuclear power generator rotor takes out the system of wearing |
| CN107204690A (en) * | 2017-07-19 | 2017-09-26 | 中国二十冶集团有限公司 | A kind of core pulling method overhauled for large-size machine |
| CN110932491A (en) * | 2019-12-16 | 2020-03-27 | 唐山钢铁集团有限责任公司 | 7500KW rough rolling main motor core-pulling maintenance method and tool |
| CN112072865A (en) * | 2020-08-08 | 2020-12-11 | 广东韶钢工程技术有限公司 | Large-scale motor online core-pulling device and application method thereof |
-
2022
- 2022-02-17 CN CN202210145875.5A patent/CN114448183A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN103683709A (en) * | 2012-09-18 | 2014-03-26 | 上海宝冶集团有限公司 | Quick lifting method for online drawing rotor of large motor |
| CN206517253U (en) * | 2017-03-08 | 2017-09-22 | 阳江核电有限公司 | A kind of nuclear power generator rotor takes out the system of wearing |
| CN107204690A (en) * | 2017-07-19 | 2017-09-26 | 中国二十冶集团有限公司 | A kind of core pulling method overhauled for large-size machine |
| CN110932491A (en) * | 2019-12-16 | 2020-03-27 | 唐山钢铁集团有限责任公司 | 7500KW rough rolling main motor core-pulling maintenance method and tool |
| CN112072865A (en) * | 2020-08-08 | 2020-12-11 | 广东韶钢工程技术有限公司 | Large-scale motor online core-pulling device and application method thereof |
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