CN110145375B - Method for solving problem of large expansion difference of low-pressure cylinder of steam turbine and device used by method - Google Patents
Method for solving problem of large expansion difference of low-pressure cylinder of steam turbine and device used by method Download PDFInfo
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- CN110145375B CN110145375B CN201910541320.0A CN201910541320A CN110145375B CN 110145375 B CN110145375 B CN 110145375B CN 201910541320 A CN201910541320 A CN 201910541320A CN 110145375 B CN110145375 B CN 110145375B
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- 238000000034 method Methods 0.000 title claims abstract description 21
- 244000161999 Acacia greggii Species 0.000 claims description 24
- 235000004608 catclaw acacia Nutrition 0.000 claims description 24
- 210000003739 neck Anatomy 0.000 claims description 9
- 238000010586 diagram Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/28—Supporting or mounting arrangements, e.g. for turbine casing
- F01D25/285—Temporary support structures, e.g. for testing, assembling, installing, repairing; Assembly methods using such structures
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
A method for solving the problem of large expansion difference of low-pressure cylinder of steam turbine and its device are disclosed, which features that the rotor is lifted up by 0.4-0.5mm by the axle neck lifting device, the external wall of rotor is not in contact with the internal wall of high-and-medium pressure cylinder, the protecting tile of rotor is removed, the distance between external wall of rotor and internal wall of high-and-medium pressure cylinder is bigger, and the front box is slid out and the slide pin is processed by jack after the high-and-medium pressure cylinder is lifted up by 1.0-1.5 mm.
Description
Technical Field
The invention relates to the technical field of steam turbines, in particular to a method and a device for solving the problem of large expansion difference of a low-pressure cylinder of a steam turbine.
Background
As known, a steam turbine is main equipment of a modern thermal power plant, but in the working process of the steam turbine, the sliding performance of a sliding pin system or a bearing platen is poor, so that the situation of large expansion difference of a low-pressure cylinder of the steam turbine is easy to occur, the normal working of the steam turbine is further affected, and even the parts such as a rotor, a cylinder and the like in the steam turbine are damaged when serious; the traditional method for solving the problem of large expansion difference of the low-pressure cylinder of the steam turbine comprises the steps of firstly disassembling the steam turbine, uncovering the pressure cylinder outside the rotor, then taking out the rotor, lifting the high-pressure cylinder and the medium-pressure cylinder, finally sliding out of the front box, and processing a sliding pin with jamming at the bottom of the front box body; however, after the problem of poor expansion of the low-pressure cylinder is solved by the method, the steam turbine needs to be assembled again, the steam seal needs to be readjusted in the assembling process, and the centers of structures such as the rotor partition plates and the like are recalibrated, so that the whole working period is long, and the maintenance cost is quite high because the steam turbine needs to be disassembled by matching with various other devices; in view of the above, there is a need in the market for a method for solving the problem of large expansion difference of a low-pressure cylinder of a steam turbine, which has short working period and low maintenance cost.
Disclosure of Invention
In order to overcome the defects in the background technology, the invention discloses a method for solving the problem of large expansion difference of a low-pressure cylinder of a steam turbine and a device used by the method.
In order to achieve the aim of the invention, the invention adopts the following technical scheme:
a method for solving the problem of large expansion difference of a low-pressure cylinder of a steam turbine and a device used by the method comprise the following steps:
step one: two ends of the rotor are respectively provided with a rotor shaft neck lifting device matched with the shaft diameter of the rotor;
step two: lifting the two ends of the rotor by 0.4-0.5mm simultaneously through a two-rotor journal lifting device, wherein the height difference of the two ends of the rotor is not more than 0.05mm;
step three: fixing the lifted rotor shaft journal and removing the rotor protection tile;
step four: lifting the high-medium pressure cylinder by 1.0-1.5mm by using a jack, removing the support adjusting cushion blocks below the cat claw heads of the two cylinders, and sliding out the front boxes at the two ends of the rotor;
step five: respectively placing a support on the two front box supporting tables, and loosening the jack after adjusting the horizontal state of the support to enable the cylinder cat claw to be supported by the support;
step six: carrying out blocking treatment on the sliding pin at the bottom of the front box;
the device for solving the problem of large expansion difference of the low-pressure cylinder of the steam turbine comprises a rotor, a front box and a front box supporting platen; the shaft body of the rotor is sleeved with a high-medium pressure cylinder, a rotor protection tile is arranged between the shaft body of the rotor and the high-medium pressure cylinder, two end heads of the rotor are respectively and correspondingly connected with a front box, the two front boxes are respectively arranged on the top surface of a front box supporting platen, and two shaft necks of the rotor are respectively provided with a rotor lifting device; the lifting jack is arranged below the high-medium pressure cylinder, two cylinder cat claws are respectively and fixedly arranged at two end surfaces of the high-medium pressure cylinder, one ends of the two cylinder cat claws, which are positioned at the same end surface, far away from the high-medium pressure cylinder are in clamping connection with the corresponding front boxes, the bottom surfaces of the cylinder cat claws, which are far away from one end of the high-medium pressure cylinder, are respectively in corresponding contact with the top surfaces of a support adjusting cushion block, the support adjusting cushion block is arranged on the top surfaces of the corresponding front box support tables, and a support used for supporting the cylinder cat claws is respectively arranged at the outer sides of the two front box support tables;
preferably, the rotor lifting device in the step comprises a supporting plate, two hydraulic cylinders, two lifting rods and a bottom plate; the two hydraulic cylinders are respectively and vertically arranged on the top surface of the cat claw head end of one cylinder, the two ends of the supporting plate are respectively and correspondingly connected with the telescopic ends of one hydraulic cylinder, the two lifting rods are respectively and vertically positioned on the two sides of the cylindrical surface of the rotor, the two lifting rods are positioned on the same vertical surface, the top ends of the two lifting rods are correspondingly and fixedly connected with the supporting plate, the bottom ends of the two lifting rods are correspondingly and fixedly connected with a bottom plate, the bottom plate is correspondingly and vertically arranged with the lifting rods, and the top surface of the bottom plate is provided with a gasket correspondingly adapted to the shaft neck of the rotor;
preferably, a dial indicator is arranged on the bottom surface of the supporting plate, a measuring rod of the dial indicator is correspondingly parallel to the lifting rod, and the tail end of the measuring rod is correspondingly abutted against the cylindrical surface of the rotor;
preferably, the top surface of the support is provided with a groove correspondingly matched with the cat claw of the cylinder.
Due to the adoption of the technical scheme, the invention has the following beneficial effects:
the invention discloses a method for solving the problem of large expansion difference of a low-pressure cylinder of a steam turbine, a device used for the method and a device used for the method, wherein a rotor is lifted by 0.4-0.5mm through a rotor journal lifting device, the outer wall of the rotor is not contacted with the inner wall of a high-medium pressure cylinder, a rotor protection tile can be removed, at the moment, the distance between the outer wall of the rotor and the inner wall of the high-medium pressure cylinder is larger, and a front box can be slid out and a sliding pin can be processed after the high-medium pressure cylinder is lifted by a jack by 1.0-1.5mm, so that the problem of large expansion difference of the low-pressure cylinder of the steam turbine is solved.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
fig. 2 is a schematic diagram of another embodiment of the present invention.
In the figure: 1. a rotor; 2. rotor protection tiles; 3. a high and medium pressure cylinder; 4. cylinder cat claw; 5. supporting and adjusting the cushion block; 6. a front case; 7. a front box support platen; 8. a support plate; 9. a hydraulic cylinder; 10. a lifting rod; 11. a bottom plate; 12. a dial indicator; 13. a measuring rod.
Description of the embodiments
The invention will be explained in more detail by the following examples, the purpose of which is to protect all technical improvements within the scope of the invention.
A method and a device for processing expansion difference of a low-pressure cylinder of a steam turbine, which are described with reference to figures 1-2, comprising the following steps:
step one: two ends of the rotor 1 are respectively provided with a rotor shaft neck lifting device matched with the shaft diameter of the rotor 1;
step two: the two ends of the rotor 1 are lifted by 0.4-0.5mm through the two-rotor shaft neck lifting device, and the two ends of the rotor 1 are lifted simultaneously, so that the damage of the rotor 1 caused by the fact that the outer wall surface of the rotor 1 is contacted with the inner wall surface of the high and medium pressure cylinder 3 due to the fact that the difference of the heights of the two ends of the rotor 1 is too large can be prevented, and the difference of the heights of the two ends of the rotor 1 is not more than 0.05mm;
step three: the lifted rotor 1 can be journaled and fixed through a rotor journal lifting device, and then the rotor protection tile 2 is removed;
step four: lifting the high and medium pressure cylinder 3 by 1.0-1.5mm by using a jack, so that the cylinder cat claw 4 clamping the high and medium pressure cylinder 3 is lifted along with the lifting, then removing the support adjusting cushion blocks 5 below the head ends of the two cylinder cat claw, and forming a gap between the cylinder cat claw 4 and the front box 6 at the moment, so that the front boxes 6 at the two ends of the rotor 1 slide out;
step five: respectively placing a support on the two front box supporting tables 7, and loosening the jack after adjusting the horizontal state of the support to enable the cylinder cat claw 4 to be supported by the support;
step six: finally, the sliding pin at the bottom of the sliding front box 6 is subjected to clamping treatment, so that the problem of large expansion difference of the low-pressure cylinder of the steam turbine is solved;
the device for solving the problem of large expansion difference of the low-pressure cylinder of the steam turbine comprises a rotor 1, a front box 6 and a front box supporting platen 7; the shaft body of the rotor 1 is sleeved with a high-medium pressure cylinder 3, a rotor protection tile 2 is arranged between the shaft body of the rotor 1 and the high-medium pressure cylinder 3, two end heads of the rotor 1 are respectively and correspondingly connected with a front box 6, the two front boxes 6 are respectively arranged on the top surface of a front box supporting platen 7, and two shaft necks of the rotor 1 are respectively provided with a rotor lifting device; in addition, the rotor lifting device comprises a supporting plate 8, two hydraulic cylinders 9, two lifting rods 10 and a bottom plate 11; the two hydraulic cylinders 9 are respectively and vertically arranged on the top surface of the head end of the cat claw 4 of the cylinder, the two ends of the supporting plate 8 are correspondingly and fixedly connected with the top surface of the hydraulic cylinder 9, the two lifting rods 10 are respectively and vertically arranged on the two sides of the cylindrical surface of the rotor 1, the two lifting rods 10 are positioned on the same vertical surface, the top ends of the two lifting rods 10 are correspondingly and fixedly connected with the supporting plate 8, the supporting plate 8 is simultaneously jacked up by the two hydraulic cylinders 9, so that the supporting plate correspondingly drives the lifting rods 10 and the bottom plate 11 to ascend, one end of the rotor is lifted up, the simultaneous action of the hydraulic cylinders 9 can prevent the rotor 1 from tilting when the lifting rods 10 are lifted up, the bottom ends of the two lifting rods 10 are correspondingly and fixedly connected with the bottom plate 11, the bottom plate 11 is correspondingly and vertically connected with the lifting rods 10, gaskets correspondingly adapted to the shaft journals of the rotor 1 are arranged on the top surface of the bottom plate 11, and the gaskets can prevent the rotor from moving on the top surface of the bottom plate 11, and play a role in positioning; a jack is arranged below the high and medium pressure cylinder 3, two end faces of the high and medium pressure cylinder 3 are respectively and fixedly provided with two cylinder catwalks 4, one end, away from the high and medium pressure cylinder, of the two cylinder catwalks 4 positioned on the same end face is in clamping connection with the corresponding front box 6, the bottom face, away from one end of the high and medium pressure cylinder 3, of the cylinder catwalks 4 is respectively in corresponding contact with the top face of a support adjusting cushion block 5, and the support adjusting cushion block 5 is arranged on the top face of the corresponding front box support bedplate 7;
according to the requirement, the bottom surface of the supporting plate 8 is provided with a dial indicator 12, a measuring rod 13 of the dial indicator 12 is correspondingly parallel to the lifting rod 10, the tail end of the measuring rod 13 is correspondingly abutted against the cylindrical surface of the rotor 1, and the lifting height of the rotor 1 can be accurately measured through the dial indicator 12, so that the outer wall surface of the rotor 1 is prevented from correspondingly contacting with the inner wall surface of the high-medium pressure cylinder 3 due to the fact that the rotor 1 is lifted up too high, and damage is further caused to the rotor 1; the outer sides of the two front box supporting tables 7 are respectively provided with a support used for supporting the cylinder cat claw 4, and the cylinder cat claw 4 can be fixedly supported through the supports, so that the high and medium pressure cylinders 3 after the jack is loosened are supported.
The invention is not described in detail in the prior art.
Claims (5)
1. A method for solving the problem of large expansion difference of a low-pressure cylinder of a steam turbine is characterized by comprising the following steps: the method comprises the following steps:
step one: two ends of the rotor (1) are respectively provided with a rotor shaft neck lifting device matched with the shaft diameter of the rotor (1);
step two: lifting the two ends of the rotor (1) by 0.4-0.5mm simultaneously through a two-rotor journal lifting device, wherein the height difference of the two ends of the rotor (1) is not more than 0.05mm;
step three: the lifted rotor (1) is journaled and fixed, and the rotor protection tile (2) is removed;
step four: lifting the high-medium pressure cylinder (3) by 1.0-1.5mm by using a jack, removing a support adjusting cushion block (5) below the head end of a cat claw (4) of the cylinder, and sliding out front boxes (6) at two ends of the rotor (1);
step five: respectively placing a support on the two front box supporting tables (7), and loosening the jack after adjusting the horizontal state of the support to enable the cylinder cat claw (4) to be supported by the support;
step six: and carrying out clamping treatment on the sliding pin at the bottom of the front box (6).
2. The device for solving the problem of large expansion difference of the low pressure cylinder of the steam turbine according to claim 1, wherein the device comprises: comprises a rotor (1), a front box (6) and a front box supporting bedplate (7); the shaft body of the rotor (1) is sleeved with a high-medium pressure cylinder (3), a rotor protection tile (2) is arranged between the shaft body of the rotor (1) and the high-medium pressure cylinder (3), two end heads of the rotor (1) are respectively and correspondingly connected with a front box (6), the two front boxes (6) are respectively arranged on the top surface of a front box supporting platen (7), and two shaft necks of the rotor (1) are respectively provided with a rotor lifting device; the lifting jack is arranged below the high-medium pressure cylinder (3), two cylinder cat claws (4) are respectively and fixedly arranged at two end faces of the high-medium pressure cylinder (3), one ends, far away from the high-medium pressure cylinder (3), of the two cylinder cat claws (4) located on the same end face are connected with a corresponding front box (6) in a clamping mode, the bottom faces, far away from one ends of the high-medium pressure cylinder (3), of the cylinder cat claws (4) are respectively in corresponding conflict with the top faces of a supporting and adjusting cushion block (5), the supporting and adjusting cushion block (5) is arranged on the top faces of corresponding front box supporting table boards (7), and supporting seats for supporting the cylinder cat claws (4) are respectively arranged on the outer sides of the two front box supporting table boards (7).
3. The device for solving the problem of large expansion difference of the low pressure cylinder of the steam turbine according to claim 2, wherein the device comprises: the rotor lifting device comprises a supporting plate (8), two hydraulic cylinders (9), two lifting rods (10) and a bottom plate (11); the two hydraulic cylinders (9) are respectively and vertically arranged on the top surface of the head end of a cylinder cat claw (4), the two ends of the bottom surface of a supporting plate (8) are respectively and correspondingly connected with the telescopic ends of the hydraulic cylinders (9), the two lifting rods (10) are respectively and vertically positioned on two sides of the cylindrical surface of the rotor (1), the two lifting rods (10) are positioned on the same vertical surface, the top ends of the two lifting rods (10) are correspondingly and fixedly connected with the supporting plate (8), the bottom ends of the two lifting rods (10) are correspondingly and fixedly connected with a bottom plate (11), the bottom plate (11) is correspondingly and vertically connected with the lifting rods (10), and the top surface of the bottom plate (11) is provided with gaskets correspondingly adapted to the shaft necks of the rotor (1).
4. A device for solving the problem of large expansion difference of a low pressure cylinder of a steam turbine according to claim 3, wherein: the bottom surface of backup pad (8) is equipped with percentage table (12), and measuring stick (13) and lifting rod (10) of percentage table (12) correspond parallel, and the terminal of measuring stick (13) corresponds the conflict with the cylinder of rotor (1).
5. The device for solving the problem of large expansion difference of the low pressure cylinder of the steam turbine according to claim 2, wherein the device comprises: the top surface of the support is provided with a groove correspondingly matched with the cylinder cat claw (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910541320.0A CN110145375B (en) | 2019-06-21 | 2019-06-21 | Method for solving problem of large expansion difference of low-pressure cylinder of steam turbine and device used by method |
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| CN201910541320.0A CN110145375B (en) | 2019-06-21 | 2019-06-21 | Method for solving problem of large expansion difference of low-pressure cylinder of steam turbine and device used by method |
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| CN110145375A CN110145375A (en) | 2019-08-20 |
| CN110145375B true CN110145375B (en) | 2024-04-09 |
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