CN108880137B - On-site horizontal type edge section iron core stacking process for steam turbine generator - Google Patents
On-site horizontal type edge section iron core stacking process for steam turbine generator Download PDFInfo
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- CN108880137B CN108880137B CN201810782323.9A CN201810782323A CN108880137B CN 108880137 B CN108880137 B CN 108880137B CN 201810782323 A CN201810782323 A CN 201810782323A CN 108880137 B CN108880137 B CN 108880137B
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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
- H02K15/02—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
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Abstract
The invention relates to an on-site horizontal type stacking side-section iron core process of a steam turbine generator, aiming at overcoming the influence of new punching sheet and pressure finger assembly gravity on the size and straightness of a groove type in the horizontal stacking process, a slot is positioned by a positioning screw, a groove sample rod and a groove wedge groove positioning rod in the stacking process, the through screw is used for shaping a through screw hole, and the quality of assembly of an installation pressure finger is ensured by the positioning screw, the groove sample rod, the groove wedge groove positioning rod and a pressure finger fixing tool after stacking.
Description
The technical field is as follows:
the invention relates to a process for horizontally stacking side-section iron cores on site of a steam turbine generator.
Background art:
after the turbonator operates for a period of time on site, faults of local serious looseness and even tooth breakage of the stator iron core (1) can occur in individual units, the fault positions are generally on the side section iron core (2), and the repair process of the faults comprises methods of on-site local treatment or complete treatment of repeated overlapping of the side section iron core (2). The stator iron core (1) is vertically stacked in a manufacturing plant, the stator iron core (1) is also vertically stacked according to a conventional process method for re-stacking the side-section iron core (2), the work is carried out on an iron core stacking station, the generator stator is required to be transported back to the manufacturing plant, and the repair process is high in cost, high in difficulty and long in period.
The invention content is as follows:
the invention aims to provide a field horizontal type overlapping edge section iron core process of a steam turbine generator, which reduces the repair cost, shortens the repair period and ensures the process requirements, and the technical scheme of the invention is that the field horizontal type overlapping edge section iron core process of the steam turbine generator comprises the following steps:
1) the process comprises the steps that after the stator iron core (1) of the turbonator with the structure of the positioning screw rod (3) and the penetrating screw rod (4) is operated for a period of time and the side section iron core (2) is damaged, the side section iron core (2) is horizontally stacked on site;
2) in front of an on-site horizontal type stacked side-section iron core (2), a positioning groove (9) in the back of a stator iron core (1) is positioned by a positioning screw rod (3), a slot wedge groove (6) of a lower wire slot (5) is positioned by a slot wedge groove positioning rod (12) and extends out by a length larger than the thickness of the side-section iron core (2), a slot bottom (7) of the lower wire slot (5) is positioned by a slot sample rod (11) and extends out by a length larger than the thickness of the side-section iron core (2), the slot sample rod (11) is propped against the slot bottom (7) by a jackscrew (13), the slot wedge groove positioning rod (12) is matched with the slot sample rod (11) to position the lower wire slot (5) in a tangential and radial direction, and a set of slot wedge groove positioning rod (12) and the slot sample rod (11) are arranged at intervals of one lower wire;
3) in the process of on-site horizontal type stacked side-section iron cores (2), a layer of new stamped sheets (8) are vertically and annularly placed on the end face of a stator iron core (1), a back positioning groove (9) is matched with a positioning screw rod (3), a lower wire groove (5) is matched with a groove sample rod (11), a groove wedge groove (6) is matched with a groove wedge groove positioning rod (12), the size and the straightness of the groove of the stacked side-section iron core (2) and the stator iron core (1) are ensured to be consistent, and a tool penetrating screw rod (14) is inserted into a penetrating screw rod hole (10) of the side-section iron core (2) and the stator iron core (1) for checking and shaping in the middle of the stacking process;
4) after the side section iron cores (2) are horizontally stacked on site, a press finger fixing tool (16) is installed in a wire inserting groove (5) without a groove wedge groove positioning rod (12) and a groove sample rod (11), the press finger fixing tool (16) is installed in a way that one end of the press finger fixing tool (16) is inserted into an air duct (17) of the stator iron core (1) for fixing, the other end of the press finger fixing tool (16) extends out of the end face of the iron core to press a press finger assembly (15), the press finger fixing tool (16) is immediately used for pressing and fixing after each group of press finger assemblies (15) are installed, meanwhile, the position of the press finger assembly (15) is positioned by adopting a positioning screw rod (3) and the groove sample rod (11), and a tool penetrating screw rod (14) is inserted into penetrating screw rod holes (10) of the side section iron cores (2), the stator iron core (1) and the press finger assembly (15) for;
5) in the process of horizontally stacking the side section iron core (2) on site, the mounting positions and requirements of the side section iron core temperature measuring element and the pressure finger temperature measuring element are kept the same as the original design;
6) and the on-site horizontal type stator iron core (1) component assembly is completed by tightly installing a positioning screw rod (3) and a through screw rod (4), heating the newly stacked side section iron core (2), tightly installing the stator iron core (1) in a hot state, bonding the newly punched sheets (8) of the side section iron core (2) into a whole, cooling the side section iron core (2), and then tightly installing the positioning screw rod (3) and the through screw rod (4) again.
The invention has the technical effects that:
1) after the turbonator operates for a period of time on site, when the side section iron core (2) breaks down and needs to be thoroughly repaired, in order to not transport the stator back to a manufacturing plant, reduce the repair cost and shorten the repair period, a process method of horizontally assembling the side section iron core (2) on site is adopted;
2) the parameters of whether the overlapping of the side section iron cores (2) is successful are that the newly overlapped side section iron cores (2) and the lower slot (5) of the original stator iron core (1) keep the slot size and the straightness consistent, and the step and the bending phenomenon can not occur, the horizontal overlapped side section iron cores (2) and the vertical overlapping in a manufacturing plant are the biggest difference, the horizontal overlapping overcomes the influence of the gravity of a new punching sheet (8) and a pressing finger assembly (15) on the slot size and the straightness, so that the repaired stator iron core (1) can meet the requirement of stator coil assembly, and meanwhile, the side section iron cores (2) and the original stator iron core (1) are pressed together after the overlapping is completed, so that the tightness of the repaired stator iron core (1) meets the requirement, and the unit can meet the operation requirement.
3) In order to ensure the groove size and the straightness of the horizontal stacked side-section iron core (2) rear groove, the invention adopts a series of measures on a positioning process and a fixing method, a lower groove (5) is positioned by a positioning screw (3), a groove sample rod (11) and a groove wedge groove positioning rod (12) in the stacking process, a tool penetrating screw (14) is integrated in a penetrating screw hole (10), and the positioning screw (3), the groove sample rod (11) and a finger pressing fixing tool (16) are used for ensuring the installation of a finger pressing assembly (15) after stacking.
The invention has been successfully applied to the horizontal repair and verification work of the 660MW turbonator stator core (1) with a certain positioning screw (3) and a through screw (4) structure; by the process method, the new side section iron core (2) is stacked by the new punching sheet (8) under the condition that the side section iron core (2) is horizontally placed on the stator, the groove type and tightness of the side section iron core (2) are all qualified, and all technical parameters of the repaired stator iron core (1) are all qualified.
Drawings
FIG. 1 shows a structure of a stator core and a side segment core of a steam turbine generator
FIG. 2 sectional view of a stator core
FIG. 3 structure diagram of new punching sheet
FIG. 4 is a view showing the structure of a press finger assembly
FIG. 5 illustrates the installation of tools before stacking of side cores
FIG. 6 end view of tool layout before stacking of side segment cores
FIG. 7 is a view showing a state of a positioning tool after the press finger is assembled and mounted
FIG. 8 is a view showing a state of a fixed finger pressing tool after finger pressing assembly
FIG. 9 end view of positioning tool and finger pressing fixture arrangement
FIG. 10 is a view showing the state of the finger pressing fixture in the lower line groove
The specific implementation mode is as follows:
the process for horizontally stacking the side iron cores on the spot of the stator of the turbonator. The process implementation process comprises the following steps:
1) before the side section iron cores 2 are stacked, positioning tools are completely installed in place, a positioning groove 9 at the back of the stator iron core 1 is positioned by a positioning screw rod 3, a slot wedge groove 6 of a lower slot 5 is positioned by a slot wedge groove positioning rod 12 and extends out by a length larger than the thickness of the side section iron core 2, a slot bottom 7 of the lower slot 5 is positioned by a slot sample rod 11 and extends out by a length larger than the thickness of the side section iron core 2, the slot sample rod 11 is propped against the slot bottom 7 by a jackscrew 13, the slot wedge groove positioning rod 12 is matched with the slot sample rod 11 to position the lower slot 5 in a tangential and radial direction, and a set of slot wedge groove positioning rod 12 and a set of slot sample rods 11 are installed at every other lower slot 5;
2) in the process of stacking the side section iron cores 2, on the premise of positioning measures, the new stamped sheets 8 are placed on the end face of the stator iron core 1 in a layer of vertical ring shape, the back positioning grooves 9 of the new stamped sheets 8 are matched with the positioning screws 3 for positioning, the lower slots 5 of the new stamped sheets 8 are matched with the slot sample bars 11 for positioning, the slot wedge slots 6 of the new stamped sheets 8 are matched with the slot wedge slot positioning bars 12 for positioning, and the slot sizes and the straightness of the stacked side section iron cores 2 and the stator iron core 1 are ensured to be consistent;
3) in the process of stacking the side section iron cores 2, inserting a tool penetrating screw 14 into penetrating screw holes 10 of the side section iron cores 2 and the stator iron cores 1 for checking and shaping;
4) after the side section iron cores 2 are stacked, a pressing finger fixing tool 16 is installed in the lower wire slot 5 without the slot wedge slot positioning rod 12 and the slot sample rod 11;
5) the method for installing the pressing finger fixing tool 16 comprises the steps that one end of the pressing finger fixing tool 16 is inserted into an air duct 17 of the stator core 1 to be fixed, the other end of the pressing finger fixing tool 16 extends out of the end face of the core to press the pressing finger assemblies 15, and each group of pressing finger assemblies 15 are immediately pressed and fixed by the pressing finger fixing tool 16 after being installed;
6) the position of the pressure finger assembly 15 is ensured by positioning the position of the pressure finger assembly 15 by adopting the positioning screw rod 3 and the groove sample rod 11, inserting the tool penetrating screw rod 14 into the penetrating screw rod holes 10 of the side section iron core 2, the stator iron core 1 and the pressure finger assembly 15, checking and shaping;
7) in the process of horizontally stacking the side section iron core 2 on site, the mounting positions and requirements of the side section iron core temperature measuring element and the pressure finger temperature measuring element are kept the same as the original design;
8) assembling parts of a stator core 1, and tightening a positioning screw rod 3 and a penetrating screw rod 4;
9) heating the newly stacked side section iron core 2 and fastening the stator iron core 1 in a thermal state to bond the side section iron core 2 into a whole;
10) and after the side section iron core 2 is cooled, the positioning screw 3 and the penetrating screw 4 are tightened again to complete the on-site horizontal type overlapping of the side section iron core 2.
The specific process steps are as follows:
the following description will be made by taking a certain steam turbine generator as an example:
according to the figure 1, the structure diagram of the turbonator comprises a stator iron core 1, an edge section iron core 2, a positioning screw rod 3, a penetrating screw rod 4, a pressure finger assembly 15, and a ventilation channel 17 of the stator iron core 1 and the edge section iron core 2;
referring to fig. 2, which is a cross-sectional view of a stator core 1 of a turbonator, the back of the stator core 1 is fixed by a positioning screw 3, the middle of the stator core is fixed by a penetrating screw 4, and the positions of a slot wedge slot 6 and a slot bottom 7 of a lower slot 5 are set;
according to the figure 3, the structure diagram of a new punching sheet 8 of the steam turbine generator is shown, a back positioning groove 9 is matched and positioned with a positioning screw 3, and a penetrating screw hole 10 is matched with a penetrating screw 4 to tighten a stator core 1;
referring to fig. 4, it is a diagram of a press finger assembly 15 of a steam turbine generator, which includes a back positioning slot 9, a lower slot 5, and a penetrating screw hole 10;
according to the figure 5, before the side section iron cores 2 are stacked, a positioning tool is installed in the lower wire slot 5 to ensure that the lengths of the slot sample rod 11, the slot wedge slot positioning rod 12 and the jackscrew 13 are as large as possible within the range of the original stator iron core 1;
according to the figure 6, every other lower wire slot 5 is provided with a slot sample rod 11, a slot wedge slot positioning rod 12 and a jackscrew 13;
according to the figure 7, the stacking process of the side section iron core 2 is that new punching sheets 8 are stacked on the end surface of the stator iron core 1 layer by layer, a back positioning groove 9 is hung on a positioning screw rod 3, the position of a lower wire slot 5 is positioned by a slot sample rod 11 and a slot wedge slot positioning rod 12, and a tool penetrating screw rod 14 is discontinuously used for shaping;
according to the figure 8, after the side section iron cores 2 are stacked, when a group of press finger assemblies 15 are installed, the press finger assemblies are immediately pressed and fixed by a press finger fixing tool, so that the back positioning grooves 9 of the press finger assemblies 15 with heavy weight are prevented from being separated from the positioning screw rods 3 and falling off, the lower wire grooves 5 are positioned by groove sample rods 11, and the side section iron cores are checked and shaped by a tool feed-through screw rod 14;
according to the figure 9, a finger pressing fixing tool 16 is arranged every other lower wire casing 5 and is arranged at the position staggered with a groove sample rod 11 and a groove wedge groove positioning rod 12;
according to fig. 10, one end of the pressing finger fixing tool 16 is inserted into the ventilation channel 17 of the lower wire casing 5, and the other end presses the pressing finger of the pressing finger assembly 15;
assembling other parts at the end part of the stator core 1, assembling a penetrating screw rod 4, tightening the stator core 1 in a cold state, heating the side section core 2, tightening the stator core 1 in a hot state, and tightening the stator core 1 again after cooling.
Claims (1)
1. A horizontal overlapping edge section iron core process for a steam turbine generator on site is characterized in that:
1) the process for horizontally stacking the side section iron cores (2) on site after the side section iron cores (2) are damaged when a turbo generator stator iron core (1) with the structure of the positioning screw (3) and the penetrating screw (4) runs for a period of time;
2) in front of an on-site horizontal type stacked side-section iron core (2), a positioning groove (9) in the back of a stator iron core (1) is positioned by a positioning screw rod (3), a slot wedge groove (6) of a lower wire slot (5) is positioned by a slot wedge groove positioning rod (12) and extends out by a length larger than the thickness of the side-section iron core (2), a slot bottom (7) of the lower wire slot (5) is positioned by a slot sample rod (11) and extends out by a length larger than the thickness of the side-section iron core (2), the slot sample rod (11) is propped against the slot bottom (7) by a jackscrew (13), the slot wedge groove positioning rod (12) is matched with the slot sample rod (11) to position the lower wire slot (5) in a tangential and radial two-way direction, and a set of slot wedge groove positioning rod (12) and a slot sample rod (11) are installed at intervals;
3) in the process of on-site horizontal type stacked side-section iron cores (2), a new punching sheet (8) is vertically and annularly placed on the end face of a stator iron core (1) in a layer, a back positioning groove (9) is matched with a positioning screw rod (3), a lower wire groove (5) is matched with a groove sample rod (11), a groove wedge groove (6) is matched with a groove wedge groove positioning rod (12), the size and the straightness of the groove of the stacked side-section iron core (2) and the stator iron core (1) are ensured to be consistent, and a tool penetrating screw rod (14) is inserted into a penetrating screw rod hole (10) of the side-section iron core (2) and the stator iron core (1) to be checked and shaped in the middle of the stacking process;
4) after the side section iron cores (2) are horizontally stacked on site, a press finger fixing tool (16) is installed in a wire inserting groove (5) without a groove wedge groove positioning rod (12) and a groove sample rod (11), the press finger fixing tool (16) is installed in a way that one end of the press finger fixing tool (16) is inserted into an air duct (17) of the stator iron core (1) for fixing, the other end of the press finger fixing tool (16) extends out of the end face of the iron core to press a press finger assembly (15), the press finger fixing tool (16) is immediately used for pressing and fixing after each group of press finger assemblies (15) are installed, meanwhile, the position of the press finger assembly (15) is positioned by adopting a positioning screw rod (3) and the groove sample rod (11), and a tool penetrating screw rod (14) is inserted into penetrating screw rod holes (10) of the side section iron cores (2), the stator iron core (1) and the press finger assembly (15);
5) in the process of horizontally stacking the side section iron cores (2) on site, the mounting positions and requirements of the side section iron core temperature measuring element and the pressure finger temperature measuring element are kept the same as the original design;
6) the method comprises the steps of horizontally re-assembling stator iron core (1) parts on site, heating a tightening positioning screw rod (3) and a penetrating screw rod (4), heating a newly stacked side section iron core (2), tightening the stator iron core (1) in a hot state, bonding a newly punched sheet (8) of the side section iron core (2) into a whole, cooling the side section iron core (2), and then re-assembling the tightening positioning screw rod (3) and the penetrating screw rod (4) to complete the horizontally stacked side section iron core (2) on site.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810782323.9A CN108880137B (en) | 2018-07-17 | 2018-07-17 | On-site horizontal type edge section iron core stacking process for steam turbine generator |
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| CN201810782323.9A CN108880137B (en) | 2018-07-17 | 2018-07-17 | On-site horizontal type edge section iron core stacking process for steam turbine generator |
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| CN108880137A CN108880137A (en) | 2018-11-23 |
| CN108880137B true CN108880137B (en) | 2020-02-25 |
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| CN110707885A (en) * | 2019-12-03 | 2020-01-17 | 哈尔滨电机厂有限责任公司 | Process method for assembling insulating sleeve on iron core back |
| CN113364226B (en) * | 2021-07-22 | 2022-09-02 | 哈尔滨电机厂有限责任公司 | Horizontal type stacking positioning and compressing process method for main stator iron core |
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| CH664854A5 (en) * | 1984-08-08 | 1988-03-31 | Bbc Brown Boveri & Cie | ELECTRIC MACHINE. |
| CN104393720B (en) * | 2014-12-09 | 2016-09-28 | 国家电网公司 | Electricity generation and electromotion machine stator core through screw rod hole localization method |
| CN104779752A (en) * | 2015-04-28 | 2015-07-15 | 湖南云箭科技有限公司 | Stator floating iron core locating and tensioning device and stator floating iron core installing method |
| CN207603409U (en) * | 2017-11-23 | 2018-07-10 | 浙江创天电机科技有限公司 | A kind of silicon steel sheet Fold additon location slot structure |
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