CN111451640A - Electric power device repair strengthening method - Google Patents
Electric power device repair strengthening method Download PDFInfo
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- CN111451640A CN111451640A CN202010280240.7A CN202010280240A CN111451640A CN 111451640 A CN111451640 A CN 111451640A CN 202010280240 A CN202010280240 A CN 202010280240A CN 111451640 A CN111451640 A CN 111451640A
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- repairing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/34—Laser welding for purposes other than joining
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P6/00—Restoring or reconditioning objects
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- Optics & Photonics (AREA)
- Plasma & Fusion (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
The invention belongs to the field of additive manufacturing and repairing, and particularly relates to a repairing and strengthening method for an electric power device. The method has the advantages that the aging and abrasion of the small and medium-sized parts can cause the damage of the large-sized parts, so that the small and medium-sized parts are timely reinforced when the large-sized parts are broken down to be repaired and remanufactured, the utilization rate of parts is improved, and meanwhile, the occurrence of secondary faults is prevented.
Description
Technical Field
The invention relates to the technical field of additive manufacturing repair, in particular to a repair strengthening method for an electric power device.
Background
At present, a thermal power plant is a main power supply mode for power generation in the power industry, wherein a main equipment system of the thermal power plant comprises a combustion system, a steam-water system and a power generation system, and a plurality of metal equipment is involved, wherein the equipment mainly comprises a steam generator set, a generator set and a boiler, the problems of corrosion, abrasion and the like easily occur in the use process of the equipment, the damage of certain small parts can cause the damage of large parts, specifically, the damage of the generator set caused by lead holes and the damage of the steam turbine set caused by a shroud ring and rivets.
Through the repair experience and analysis of large parts of electric power equipment, a method for efficiently repairing and strengthening an electric power device is urgently needed.
Disclosure of Invention
Based on this, the invention aims to provide a method for repairing and strengthening an electric power device.
Specifically, the invention provides the following technical scheme:
a method for repairing and strengthening an electric power device is characterized by comprising the following steps: repairing and remanufacturing a large-sized component, repairing and reinforcing a medium-sized component, and reinforcing a small-sized part;
the repairing and remanufacturing of the large-scale component comprises laser cladding remanufacturing of a main journal, a thrust disc, a gas seal top and a blade of the steam turbine;
the repair reinforcement of the medium-sized component comprises the laser surface cladding reinforcement of a nozzle and a partition plate of the steam turbine;
the strengthening of the small parts comprises the laser quenching strengthening of a shroud ring and a rivet of the turbine movable blade and the laser surface cladding strengthening of a lead hole of a conductive screw;
when the large-sized component is worn, the repair and reinforcement operations of the medium-sized component and the small-sized component are simultaneously performed.
In the repairing and remanufacturing step of the large-scale component, the main journal of the steam turbine, the thrust disc and the gas seal top are of an integral structure, when one component is abraded, the integral operation is influenced, integral scanning detection is needed, and repairing and remanufacturing of the abraded part is carried out according to a detection result.
The scanning detection is specifically that the whole scanning of the large-scale part is carried out through a three-dimensional scanning instrument, and the worn part is found through scanning.
The middle-sized component and the small-sized component strengthening operation which are synchronously performed are the middle-sized component and the small-sized component which are associated with the large-sized component which is worn.
The technical scheme has the beneficial effects that:
1. according to the repairing experience, the large-sized component is repaired, meanwhile, the medium-sized component and the small-sized component are strengthened, and the occurrence of secondary damage after repair is avoided.
2. All worn parts on the large-scale part can be found in a targeted manner through scanning analysis, targeted repair and remanufacture are carried out, and the reuse rate of parts of various models is increased.
Drawings
FIG. 1 is a flow chart of a method of the present invention;
FIG. 2 is another flow chart of the method of the present invention;
Detailed Description
In order to make the present invention more comprehensible to those skilled in the art, the present invention is further described in the following with reference to examples and the accompanying drawings.
The steam turbine body is an essential part of the steam turbine set which converts steam heat energy into mechanical energy. It is composed of a fixed part (stator) and a rotating part (rotor). A steam turbine is a rotating prime mover that converts the thermal potential energy of steam into mechanical energy. The rotor comprises a main shaft, an impeller, a moving blade, a coupling and the like. The stator comprises a steam inlet part, a cylinder, a clapboard, a static cascade, a steam seal, a bearing and the like.
The cylinder is a shell of the steam turbine and is used for separating a through-flow part of the steam turbine from the atmosphere to form a closed steam chamber so as to ensure that the steam completes the energy conversion process in the steam turbine, and the cylinder is internally provided with a nozzle chamber, a partition plate sleeve and other parts; the outside of the cylinder is connected with pipelines for steam inlet, steam exhaust, steam extraction and the like.
The high and medium pressure sections of the cylinder are generally cast from alloy steel or carbon steel, and the low pressure section can be cast or welded from simple castings, section steel and steel plates according to the capacity and structural requirements.
The rotor is integrally machined from an alloy steel forging. The speed regulator end of the high pressure rotor is connected with a long shaft by a rigid coupling, and the main oil pump and the overspeed tripping structure are arranged on the upper shaft of the coupling.
All rotors were finish machined and, after all blades were assembled, full speed rotational testing and precision dynamic balancing were performed.
The coupling is used for connecting each rotor of the steam turbine and the rotor of the generator and transmitting the torque of the steam turbine to the generator. Couplings commonly used in modern steam turbines are commonly used in three forms: rigid couplings, semi-flexible couplings and flexible couplings.
The fixed blade clapboard is used for fixing the fixed blade and dividing the cylinder into a plurality of steam chambers.
The moving blades are installed on the rotor impeller or the rotary drum, receive the high-speed airflow emitted by the nozzle blade grids, convert the kinetic energy of the steam into mechanical energy and enable the rotor to rotate.
Steam seal, the clearance between rotor and the quiet body can lead to leaking vapour, and this not only can reduce unit efficiency, still can influence unit safe operation. To prevent steam leakage and air ingress, a sealing device, commonly referred to as a gland seal, is required.
The steam seal is divided into a through-flow part steam seal, a clapboard steam seal and a shaft end steam seal according to different installation positions.
Bearings are an important component of steam turbines and are divided into two types, radial support bearings and thrust bearings, which are used to bear the entire weight of the rotor and determine the correct position of the rotor in the cylinder.
Example (b):
a method for repairing and strengthening an electric power device is characterized by comprising the following steps: repairing and remanufacturing a large-sized component, repairing and reinforcing a medium-sized component, and reinforcing a small-sized part;
the repairing and remanufacturing of the large-scale component comprises laser cladding remanufacturing of a main journal, a thrust disc, a gas seal top and a blade of the steam turbine;
the repair reinforcement of the medium-sized component comprises the laser surface cladding reinforcement of a nozzle and a partition plate of the steam turbine;
the strengthening of the small parts comprises the laser quenching strengthening of a shroud ring and a rivet of the turbine movable blade and the laser surface cladding strengthening of a lead hole of a conductive screw;
when the large-sized component is worn, the repair and reinforcement operations of the medium-sized component and the small-sized component are simultaneously performed.
In the repairing and remanufacturing step of the large-scale component, the main journal of the steam turbine, the thrust disc and the gas seal top are of an integral structure, when one component is abraded, the integral operation is influenced, integral scanning detection is needed, and repairing and remanufacturing of the abraded part is carried out according to a detection result.
The scanning detection is specifically that the whole scanning of the large-scale part is carried out through a three-dimensional scanning instrument, and the worn part is found through scanning.
The middle-sized component and the small-sized component strengthening operation which are synchronously performed are the middle-sized component and the small-sized component which are associated with the large-sized component which is worn.
According to a preferred embodiment of the present solution, as shown in the attached FIG. 1 of the specification
After the electric power part is damaged, the large part and the middle and small parts are respectively disassembled and detected, the specific detection is completed in a three-dimensional scanning mode and is used for comparing and finding the damaged part, the image contrast detection can be performed in a mode of combining a high-definition camera to photograph, meanwhile, the detection result is finally summarized in combination with the naked eye and the measurement detection of technical personnel. And carrying out laser cladding repair remanufacturing on the worn part of the large part, strengthening the surface of the medium and small parts by using laser, and carrying out installation operation after the completion.
According to another preferred embodiment of the present solution, as shown in the attached FIG. 2 of the specification
After the electric power part is damaged, the large part and the middle and small parts are respectively disassembled and detected, the specific detection is completed in a three-dimensional scanning mode and is used for comparing and finding the damaged part, the image contrast detection can be performed in a mode of combining a high-definition camera to photograph, meanwhile, the detection result is finally summarized in combination with the naked eye and the measurement detection of technical personnel. And carrying out laser cladding repair remanufacturing on the worn part of the large part, carrying out laser surface strengthening on the medium and small parts, re-detecting the repaired part, and carrying out installation operation after the detection is finished.
According to the present invention, a power device for an object includes: a main journal of the steam turbine, a thrust disc and a gas seal top; the medium component includes: steam turbine nozzles and diaphragms; the small parts comprise shrouds and rivets of the movable blades.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included therein.
Claims (4)
1. A method for repairing and strengthening an electric power device is characterized by comprising the following steps: repairing and remanufacturing a large-sized component, repairing and reinforcing a medium-sized component, and reinforcing a small-sized part;
the repairing and remanufacturing of the large-scale component comprises laser cladding remanufacturing of a main journal, a thrust disc, a gas seal top and a blade of the steam turbine;
the repair reinforcement of the medium-sized component comprises the laser surface cladding reinforcement of a nozzle and a partition plate of the steam turbine;
the strengthening of the small parts comprises the laser quenching strengthening of a shroud ring and a rivet of the turbine movable blade and the laser surface cladding strengthening of a lead hole of a conductive screw;
when the large-sized component is worn, the repair and reinforcement operations of the medium-sized component and the small-sized component are simultaneously performed.
2. The power device repair reinforcement method according to claim 1, characterized in that: in the repairing and remanufacturing step of the large-scale component, the main journal of the steam turbine, the thrust disc and the gas seal top are of an integral structure, when one component is abraded, the integral operation is influenced, integral scanning detection is needed, and repairing and remanufacturing of the abraded part is carried out according to a detection result.
3. The power device repair reinforcement method according to claim 2, characterized in that: the scanning detection is specifically that the whole scanning of the large-scale part is carried out through a three-dimensional scanning instrument, and the worn part is found through scanning.
4. The power device repair reinforcement method according to claim 1, characterized in that: the middle-sized component and the small-sized component strengthening operation which are synchronously performed are the middle-sized component and the small-sized component which are associated with the large-sized component which is worn.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010280240.7A CN111451640A (en) | 2020-04-10 | 2020-04-10 | Electric power device repair strengthening method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010280240.7A CN111451640A (en) | 2020-04-10 | 2020-04-10 | Electric power device repair strengthening method |
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| CN111451640A true CN111451640A (en) | 2020-07-28 |
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Citations (6)
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| CN101204766A (en) * | 2006-12-22 | 2008-06-25 | 沈阳大陆激光技术有限公司 | Boat diesel oil generator tank cover repair process method |
| CN101403114A (en) * | 2008-10-24 | 2009-04-08 | 江苏宏大特种钢机械厂 | Surface crack renovation method for key elements of chain grate |
| CN102059500A (en) * | 2010-11-25 | 2011-05-18 | 秦皇岛洪川实业有限公司 | Laser repairing method for tooth corona reconstructing of transmission tooth roller of single-roller crusher |
| CN104831271A (en) * | 2015-05-09 | 2015-08-12 | 芜湖鼎恒材料技术有限公司 | Laser hot cladding process of shaft-type component |
| CN105695988A (en) * | 2016-04-11 | 2016-06-22 | 南京辉锐光电科技有限公司 | Repair device and method for railway vehicle wheels and adopted iron-base alloy powder |
| CN108723692A (en) * | 2017-04-13 | 2018-11-02 | 广西隆盛双金属铜合金制造有限公司 | Cane squeezing roll renovation technique |
-
2020
- 2020-04-10 CN CN202010280240.7A patent/CN111451640A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101204766A (en) * | 2006-12-22 | 2008-06-25 | 沈阳大陆激光技术有限公司 | Boat diesel oil generator tank cover repair process method |
| CN101403114A (en) * | 2008-10-24 | 2009-04-08 | 江苏宏大特种钢机械厂 | Surface crack renovation method for key elements of chain grate |
| CN102059500A (en) * | 2010-11-25 | 2011-05-18 | 秦皇岛洪川实业有限公司 | Laser repairing method for tooth corona reconstructing of transmission tooth roller of single-roller crusher |
| CN104831271A (en) * | 2015-05-09 | 2015-08-12 | 芜湖鼎恒材料技术有限公司 | Laser hot cladding process of shaft-type component |
| CN105695988A (en) * | 2016-04-11 | 2016-06-22 | 南京辉锐光电科技有限公司 | Repair device and method for railway vehicle wheels and adopted iron-base alloy powder |
| CN108723692A (en) * | 2017-04-13 | 2018-11-02 | 广西隆盛双金属铜合金制造有限公司 | Cane squeezing roll renovation technique |
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Application publication date: 20200728 |
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