CN113922601B - Local replacement process method for upper-layer bar of large-sized gas turbine generator stator - Google Patents
Local replacement process method for upper-layer bar of large-sized gas turbine generator stator Download PDFInfo
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- CN113922601B CN113922601B CN202111330661.7A CN202111330661A CN113922601B CN 113922601 B CN113922601 B CN 113922601B CN 202111330661 A CN202111330661 A CN 202111330661A CN 113922601 B CN113922601 B CN 113922601B
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- 238000000034 method Methods 0.000 title claims abstract description 53
- 238000009413 insulation Methods 0.000 claims description 13
- 230000005484 gravity Effects 0.000 claims description 12
- 239000011521 glass Substances 0.000 claims description 10
- 229920000728 polyester Polymers 0.000 claims description 10
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 4
- 239000002390 adhesive tape Substances 0.000 claims description 4
- 230000005284 excitation Effects 0.000 claims description 4
- 239000000945 filler Substances 0.000 claims description 4
- 238000004140 cleaning Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 230000001105 regulatory effect Effects 0.000 claims description 2
- 230000007935 neutral effect Effects 0.000 claims 4
- 238000004804 winding Methods 0.000 abstract description 12
- 230000008439 repair process Effects 0.000 abstract description 4
- 238000010276 construction Methods 0.000 abstract description 3
- 239000002023 wood Substances 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
Classifications
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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
- H02K15/0006—Disassembling, repairing or modifying dynamo-electric machines
Abstract
The invention discloses a local replacement process method for an upper-layer bar of a stator of a large-sized gas turbine generator. The novel process method suitable for dismantling upper and lower single stator bars of a large-scale gas turbine generator is adopted, and the number of the required door opening bars is determined through the process test of the old bars, so that the novel stator bars can be safely and effectively replaced, and the partial replacement of the upper stator bars becomes possible. The novel process method for replacing the stator winding locally can remove the upper stator bar of the large-scale gas turbine generator to the minimum extent, ensure the safety of the adjacent stator bars, save the construction period and huge cost, and has great economic and social significance. Meanwhile, the blank of domestic local repair of the gas turbine generator is made up.
Description
Technical Field
The invention relates to the field of gas turbine generators, in particular to a local replacement process method for an upper-layer bar of a large-sized gas turbine generator stator.
Background
A knapsack slot wedge system is usually adopted in a stator slot of a large-sized gas turbine generator, side corrugated plates are continuously arranged in the whole length range of a lower slot, and after the side corrugated plates are assembled, stator bars are difficult to adjust; the stator bar has large aspect ratio, and a door closing process is needed during assembly; the stator bar has large involute length and thin main insulation, and the insulation of the assembled and disassembled stator bar is easy to damage. When the stator winding of the large-sized gas turbine generator is assembled and subjected to a withstand voltage test, once the situation of breakdown of the upper layer of the stator winding on the ground insulation occurs, the repair process method of the gas turbine generator adopts a mechanical mode to destructively remove the stator winding, and then the whole stator winding on the upper layer is replaced or the whole stator winding is replaced, so that the economic loss is extremely serious. For the process method of local repair, the country is in a blank state for a long time. The novel process method for replacing the stator winding locally can remove the upper stator bar of the large-scale gas turbine generator to the minimum extent, ensure the safety of the adjacent stator bars, save the construction period and huge cost, and has great economic and social significance.
Disclosure of Invention
The invention provides a local replacement process method for an upper-layer bar of a stator of a large-sized gas turbine generator, which is realized by the following steps:
step one: disassembly work of stator bar fixation: the non-accident stator bar A is used as a door opening bar, the accident stator bar is used as a door closing bar, and the nose end of the accident stator bar, the related end part are bound, the adjacent spacing blocks and the inside of the groove are fixedly removed; dismantling a nose end of a non-accident stator bar A, binding related end parts and fixing and removing in a groove, wherein the nose end is adjacent to the accident stator bar, and the involute part of the end part is positioned on the accident stator bar;
step two: preparation work before dismantling an accident stator bar: the tightening strap passes through the notch of the accident stator bar, and the battens are supported near the iron core edge sections at the two ends of the steam excitation in the stator bore, so that the tightening strap has a stress point when being tightened; manufacturing a wire rod disassembling tool; the rubber protects the non-accident stator bar A and the non-accident stator bar B on two sides of the accident stator bar;
step three: dismantling the accident stator bar: hammering a coil bar disassembling tool at the involute position of the accident stator coil bar by using rubber hammers at two ends of the accident stator coil bar, so that the accident stator coil bar is gradually separated from the original position, and tightening the tightening belt along with the gradual lifting of the accident stator coil bar until the accident stator coil bar is lifted out of the stator bore, and well tightening the tightening belt;
step four: door opening of the non-accident stator bar A: adjusting the positions of the battens near the iron core edge sections at the two ends of the steam excitation in the stator bore, and enabling the tightening strap to pass through the notch of the non-accident stator bar A; the rubber sheet protects the non-accident stator bar C, the two ends of the non-accident stator bar A are hammered into the bar disassembling tool by using a rubber hammer at the involute position of the non-accident stator bar A, so that the non-accident stator bar A is gradually separated from the original position, the tightening belt is tightened along with the gradual lifting of the non-accident stator bar A until the non-accident stator bar A is lifted to a position near the nose end and in contact with the non-accident stator bar C, and then the nose end of the non-accident stator bar A is fixed with the nose end of the non-accident stator bar C by using a polyester glass rope;
step five: determining the number of the door opening bars: the accident stator bar is assembled back, and the axial position of the accident stator bar is adjusted during installation, so that the accident stator bar is installed in the groove under the condition of only being subjected to gravity after the axial position is adjusted; if the accident stator bar cannot be installed in the groove under the condition of only being subjected to gravity after the axial position of the accident stator bar is adjusted, the accident stator bar is moved out of the bore, the first step and the fourth step are repeated, the non-accident stator bar C is used as a door opening bar, after the door opening bar is lifted, the nose end of the non-accident stator bar A, the non-accident stator bar C and the nose end of the non-accident stator bar D are fixed by a polyester glass rope, the accident stator bar is assembled again, if the accident stator bar cannot be installed normally, the first step and the fourth step are continuously repeated until the accident stator bar is installed in the groove under the condition of only being subjected to gravity after the axial position of the accident stator bar is adjusted;
step six: dismantling the accident stator bar: hammering a coil bar disassembling tool at the involute position of the accident stator coil bar by using rubber hammers at two ends of the accident stator coil bar, so that the accident stator coil bar is gradually separated from the original position, and tightening the tightening belt along with the gradual lifting of the accident stator coil bar until the accident stator coil bar is lifted out of the stator bore, and well tightening the tightening belt;
step seven: repairing damaged insulation of residual bars in the bore;
step eight: thoroughly cleaning;
step nine: changing the pad material;
step ten: replacement of the new stator bar, restoration of the door-open bar: after the axial position is properly adjusted and regulated, the novel stator bar is installed in the groove under the condition of only being subjected to gravity, and the polyester glass rope is removed, so that the stator bar with the door opened falls into the stator bore;
step eleven: and (3) carrying out an electrical test, after the test is qualified, replacing the side corrugated plate, and recovering the binding and assembly of each part according to the drawing until all the requirements of the handover test are met.
The above-mentioned large-scale gas turbine generator stator upper strata bar local replacement process method: in the second step, the wooden block, the filler strip and the thick rubber are wound together by using an adhesive tape to form the wire rod disassembling tool, and the contact position of the wire rod disassembling tool and the wire rod is one side of the protection position by using the rubber when the wire rod disassembling tool is stressed.
The above-mentioned large-scale gas turbine generator stator upper strata bar local replacement process method: in the second step and the fourth step, the wood Fang Liangduan is protected by rubber, and the upper surface of the wood is parallel to the upper surface of the removed wire rod.
The above-mentioned large-scale gas turbine generator stator upper strata bar local replacement process method: in the third step, in the process of removing the coil bar, the lifting heights of the two ends of the accident stator coil bar are required to be observed and ensured to be consistent at any time.
The above-mentioned large-scale gas turbine generator stator upper strata bar local replacement process method: in the fourth step, in the process of removing the bar, the lifting heights of the two ends of the non-accident stator bar A need to be observed at any time and are ensured to be consistent.
The above-mentioned large-scale gas turbine generator stator upper strata bar local replacement process method: in the fourth step, the non-accident stator bar C is a stator bar adjacent to the non-accident stator bar a, and the end involute portion is located on the non-accident stator bar a.
The above-mentioned large-scale gas turbine generator stator upper strata bar local replacement process method: in the fifth step, the non-accident stator bar D is a stator bar adjacent to the non-accident stator bar C, and the end involute portion is located on the stator bar C.
Compared with the prior art, the invention has the following beneficial effects:
the stator bar of the large-sized gas turbine generator has large aspect ratio, is difficult to assemble in assembly, and is easy to deform locally; because of the existence of the side corrugated plates in the lower wire slot, the stator bar is difficult to fix; after the corrugated plate is assembled, the stator bar is difficult to adjust; the main insulation of the stator bar is thin, the involute length is large, and the insulation of the stator bar is easy to damage. The stator of the gas turbine generator is locally repaired, and the stator is in a blank state in China. When the stator winding of the large-sized gas turbine generator is assembled and subjected to a withstand voltage test, once the situation of breakdown of the upper layer of the stator winding to the ground insulation occurs, only all the upper layer of stator bars or all the upper and lower layer of stator bars can be replaced due to no related local repair process in China, so that great economic loss is caused. Aiming at the phenomenon, the invention further analyzes the difficulties of the stator bar and winding structure of the large-sized gas turbine generator and the assembled winding, adopts a new stator bar dismantling process (the process is suitable for dismantling upper and lower layer bars), and determines the number of bars needing to be opened by carrying out process tests on old bars, thereby safely and effectively replacing the new stator bar. After the wire rod is partially replaced, the related preventive electric test passes, and the requirement of long-term operation is met.
Drawings
FIG. 1 is a schematic view of the stator slot structure of a gas turbine generator.
Fig. 2 is a schematic diagram of the stator bar removal principle of the gas turbine generator.
Fig. 3 is a schematic view of the protection of the stator bars of the gas turbine generator when removed.
FIG. 4 is a schematic diagram of a gas turbine generator bar disassembly tool.
FIG. 5 is a schematic illustration of a nose end securement of a gas turbine generator.
The figure indicates: 1-side corrugated plate, 2-stator bar, 3-accident stator bar, 4-non-accident stator bar A, 5-non-accident stator bar B, 6-rubber, 7-square, 8-tightening belt, 10-adhesive tape, 11-wood block, 12-filler strip, 13-thick rubber, 15-non-accident stator bar C and 16-polyester glass rope.
Detailed Description
The present application is further described below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical solutions of the present invention and are not intended to limit the scope of protection of the present application.
The embodiment provides a process method for locally replacing an upper-layer bar of a stator of a large-sized gas turbine generator, which is realized by the following steps:
step one: the disassembly work of stator bar 2 fixation: the non-accident stator bar A4 is used as a door opening bar, the accident stator bar 3 is used as a door closing bar, and the nose end and the related end of the accident stator bar 3 are bound, and adjacent spacing blocks and grooves are fixedly removed; and dismantling the nose end of the non-accident stator bar A4, binding the relevant end part and fixing and removing the non-accident stator bar A4 in the groove, wherein the nose end and the relevant end part are adjacent to the accident stator bar 3, and the involute parts of the end parts are positioned on the accident stator bar 3.
Step two: preparation work before the accident stator bar 3 is dismantled: as shown in fig. 2, the tightening strap 8 passes through the notch of the accident stator bar 3, and the batten 7 is supported near the iron core edge sections at the two ends in the stator bore, so that the tightening strap 8 has a stress point when being tightened; as shown in fig. 3, the rubber 6 protects the non-accident stator bar A4 and the non-accident stator bar B5 on both sides of the accident stator bar 3; as shown in fig. 4. A wire rod disassembling tool 9 is manufactured. In this way, the insulation of the stator bar 2 is protected to the maximum.
Step three: dismantling the accident stator bar 3: the rubber hammers 14 are used at the two ends to hammer the coil bar disassembling tool 9 at the involute position of the accident stator coil bar 3 at the same time, so that the accident stator coil bar 3 is gradually separated from the original position, the tightening belt 8 is tightened along with the gradual lifting of the accident stator coil bar 3 until the accident stator coil bar 3 is lifted out of the stator bore, and the tightening belt 8 is wound. The stator bars 2 are partially removed so that it becomes possible to partially replace the upper stator bars 2 with new ones.
Step four: door opening of the non-accident stator bar A4: the positions of the battens 7 near the core edge sections at the two ends of the steam excitation in the stator bore are adjusted, and the tensioning belts 8 penetrate through the notch of the non-accident stator bar A4; the rubber sheet protects the non-accident stator bar C15, and the rubber hammer 14 is used for hammering the bar disassembling tool 9 at the involute position of the non-accident stator bar A4 at the two ends, so that the non-accident stator bar A4 is gradually separated from the original position, the tightening belt 8 is tightened along with the gradual lifting of the non-accident stator bar A4 until the non-accident stator bar A4 is lifted to a position near the nose end and in contact with the non-accident stator bar C15, and then the nose end of the non-accident stator bar A4 is fixed with the nose end of the non-accident stator bar C15 by the polyester glass rope 16 as shown in fig. 5. In this way, the insulation of the door-opening non-accident stator bar A4 is protected to the maximum extent.
Step five: determining the number of the door opening bars: the accident stator bar 3 is assembled back, and when the accident stator bar 3 is assembled, the axial position of the accident stator bar 3 is adjusted, so that the accident stator bar 3 is assembled in the groove under the condition of only being subjected to gravity after the axial position is adjusted; if the accident stator bar 3 cannot be installed in the groove under the condition of only being subjected to gravity after the axial position is adjusted, the accident stator bar 3 is moved out of the bore, the first step and the fourth step are repeated, the non-accident stator bar C15 is used as a door opening bar, after the door opening bar is lifted, the nose end of the non-accident stator bar A4, the non-accident stator bar C15 and the nose end of the non-accident stator bar D17 are fixed by using the polyester glass rope 16, the accident stator bar 3 is assembled again, and if the accident stator bar 3 cannot be installed normally, the first step and the fourth step are continuously repeated until the accident stator bar 3 is installed in the groove under the condition of only being subjected to gravity after the axial position is adjusted. By the method, the upper stator bar of the large-sized gas turbine generator is removed to the minimum, so that the construction period and huge cost are saved.
Step six: dismantling the accident stator bar 3: hammering the coil bar disassembling tool 9 at the involute position of the accident stator coil bar 3 by using the rubber hammer 14 at both ends simultaneously, so that the accident stator coil bar 3 is gradually separated from the original position, and tightening the tightening belt 8 along with the gradual lifting of the accident stator coil bar 3 until the accident stator coil bar 3 is lifted out of the stator bore, and winding the tightening belt 8;
step seven: repairing damaged insulation of residual bars in the bore;
step eight: thoroughly cleaning;
step nine: changing the pad material;
step ten: replacement of the new stator bar 18, restoration of the door bar: after the axial position is properly adjusted and adjusted until a new stator bar 18 is installed in the groove under the condition of only being subjected to gravity, removing the polyester glass rope 16, and enabling the stator bar with the door open to fall into the stator bore;
step eleven: and (3) after the electric test is qualified, replacing the side corrugated board 1, and recovering the binding and assembly of each part according to the drawing until all the requirements of the handover test are met.
Further: in the second step, the wooden block 11, the filler strip 12 and the thick rubber 13 are wound together by using the adhesive tape 10 to form the wire rod disassembling tool 9, and the contact position of the wire rod disassembling tool and the wire rod is one side of the protection position by using the rubber 6 when the wire rod disassembling tool is stressed. The insulation of the stator bars 2 in contact with the bar dismantling tool 9 is protected to the maximum.
Further: in the second step and the fourth step, the two ends of the batten 7 are protected by rubber 6, so that the stator core is prevented from being damaged when the batten 7 is stressed. The upper surface of the batten 7 is parallel to the upper surface of the removed wire rod 3, so that the stress transmission is stable.
Further: in the third step, in the process of removing the bar, the lifting heights of the two ends of the accident stator bar 3 are required to be observed and ensured to be consistent at any time, so that the accident stator bar 3 is prevented from being stressed locally in the groove, and the removal is difficult.
Further: in the fourth step, in the process of removing the bar, the lifting heights of the two ends of the non-accident stator bar A4 are required to be observed at any time and are ensured to be consistent. The non-accident stator bar A4 for preventing the door from being opened is locally stressed in the groove, and the insulation is damaged.
Further: in the fourth step, the non-accident stator bar C15 is a stator bar adjacent to the non-accident stator bar A4 and having an end involute portion located on the non-accident stator bar A4.
Further: in the fifth step, the non-accident stator bar D17 is a stator bar adjacent to the non-accident stator bar C15 and having the end involute portion located on the stator bar C15.
The present invention is merely illustrative of the present invention and not limited to the scope thereof, and those skilled in the art can make modifications thereto without departing from the spirit of the invention.
Claims (7)
1. A local replacement process method for an upper-layer bar of a stator of a large-sized gas turbine generator is characterized by comprising the following steps:
step one: the stator bar (2) is fixed to disassemble work: the non-accident stator bar A (4) is used as a door opening bar, the accident stator bar (3) is used as a door closing bar, and the nose end, the related end binding, the adjacent spacing blocks and the inside of the groove of the accident stator bar (3) are fixedly removed; dismantling the nose end of a non-accident stator bar A (4) adjacent to the accident stator bar (3) and with the involute part of the end part positioned on the accident stator bar (3), binding the relevant end part and removing the inner fixing of the groove;
step two: preparation work before dismantling the accident stator bar (3): the tightening belt (8) passes through the notch of the accident stator bar (3), and the battens (7) are supported near the iron core edge sections at the two ends in the stator bore, so that the tightening belt (8) has stress points when being tightened; manufacturing a wire rod disassembling tool (9); the rubber (6) protects the non-accident stator bar A (4) and the non-accident stator bar B (5) on two sides of the accident stator bar (3);
step three: dismantling the accident stator bar (3): hammering a coil bar disassembling tool (9) at the involute position of the accident stator coil bar (3) by using a rubber hammer (14) at two ends simultaneously, so that the accident stator coil bar (3) is gradually separated from the original position, and tightening the tightening belt (8) along with the gradual lifting of the accident stator coil bar (3) until the accident stator coil bar (3) is lifted out of the stator bore, and well tightening the tightening belt (8);
step four: door opening of the non-accident stator bar A (4): the positions of the battens (7) near the core edge sections at the two ends of the steam excitation in the stator bore are adjusted, and the tensioning belt (8) passes through the notch of the non-accident stator bar A (4); the rubber sheet protects the non-accident stator bar C (15), the rubber hammer (14) is used for hammering the bar disassembling tool (9) at the involute position of the non-accident stator bar A (4) at the two ends, so that the non-accident stator bar A (4) is gradually separated from the original position, the tightening belt (8) is tightened along with the gradual lifting of the non-accident stator bar A (4) until the non-accident stator bar A (4) is lifted to a position near the nose end and in contact with the non-accident stator bar C (15), and then the polyester glass rope (16) is used for fixing the nose end of the non-accident stator bar A (4) and the nose end of the non-accident stator bar C (15);
step five: determining the number of the door opening bars: the accident stator bar (3) is assembled back, and when the accident stator bar is assembled, the axial position of the accident stator bar (3) is adjusted, so that the accident stator bar (3) is assembled in the groove under the condition of only being subjected to gravity after the axial position is adjusted; if the accident stator bar (3) cannot be installed in the groove under the condition of only being subjected to gravity after the axial position is adjusted, the accident stator bar (3) is moved out of the bore, the first step and the fourth step are repeated, the non-accident stator bar C (15) is used as a door opening bar, after the door opening bar is lifted, the nose end of the non-accident stator bar A (4), the non-accident stator bar C (15) and the nose end of the non-accident stator bar D (17) are fixed by using a polyester glass rope (16), the accident stator bar (3) is again tried, if the accident stator bar (3) cannot be normally installed, the first step and the fourth step are continuously repeated until the accident stator bar (3) is installed in the groove under the condition of only being subjected to gravity after the axial position is adjusted;
step six: dismantling the accident stator bar (3): hammering a coil bar disassembling tool (9) at the involute position of the accident stator coil bar (3) by using a rubber hammer (14) at two ends simultaneously, so that the accident stator coil bar (3) is gradually separated from the original position, and tightening the tightening belt (8) along with the gradual lifting of the accident stator coil bar (3) until the accident stator coil bar (3) is lifted out of the stator bore, and well tightening the tightening belt (8);
step seven: repairing damaged insulation of residual bars in the bore;
step eight: thoroughly cleaning;
step nine: changing the pad material;
step ten: replacement of the new stator bar (18), restoring the door-open bar: after the axial position is properly adjusted and regulated, the polyester glass rope (16) is removed until a new stator bar (18) is installed in the groove under the condition of only being subjected to gravity, so that the stator bar with the door opened falls into a stator bore;
step eleven: and (3) carrying out an electrical test, replacing the side corrugated board (1) after the test is qualified, and recovering the binding and the assembly of each part according to the drawing until all the requirements of the handover test are met.
2. The process for locally replacing the upper-layer bar of the stator of the large-sized gas turbine generator according to claim 1, which is characterized in that: in the second step, the wooden block (11), the filler strip (12) and the thick rubber (13) are wound together by using the adhesive tape (10) to form the wire rod disassembling tool (9), and the position contacted with the wire rod when the wire rod is stressed is one side of the protection position by using the rubber (6).
3. The process for locally replacing the upper-layer bar of the stator of the large-sized gas turbine generator according to claim 1, which is characterized in that: in the second step and the fourth step, two ends of the batten (7) are protected by rubber (6), and the upper surface of the batten (7) is parallel to the upper surface of the dismantled wire rod (3).
4. The process for locally replacing the upper-layer bar of the stator of the large-sized gas turbine generator according to claim 1, which is characterized in that: in the process of removing the neutral bars in the third step, the lifting heights of the two ends of the accident stator neutral bars (3) are required to be observed and ensured to be consistent at any time.
5. The process for locally replacing the upper-layer bar of the stator of the large-sized gas turbine generator according to claim 1, which is characterized in that: in the process of removing the neutral bars in the fourth step, the lifting heights of the two ends of the non-accident stator neutral bars A (4) are required to be observed and ensured to be consistent at any time.
6. The process for locally replacing the upper-layer bar of the stator of the large-sized gas turbine generator according to claim 1, which is characterized in that: in the fourth step, the non-accident stator bar C (15) is a stator bar adjacent to the non-accident stator bar a (4) and the end involute portion is located on the non-accident stator bar a (4).
7. The process for locally replacing the upper-layer bar of the stator of the large-sized gas turbine generator according to claim 1, which is characterized in that: in the fifth step, the non-accident stator bar D (17) is a stator bar adjacent to the non-accident stator bar C (15) and having the end involute portion located on the stator bar C (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111330661.7A CN113922601B (en) | 2021-11-11 | 2021-11-11 | Local replacement process method for upper-layer bar of large-sized gas turbine generator stator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111330661.7A CN113922601B (en) | 2021-11-11 | 2021-11-11 | Local replacement process method for upper-layer bar of large-sized gas turbine generator stator |
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| CN113922601A CN113922601A (en) | 2022-01-11 |
| CN113922601B true CN113922601B (en) | 2024-03-15 |
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| CN116780835B (en) * | 2023-08-17 | 2023-10-20 | 哈尔滨电机厂有限责任公司 | Process method for replacing single stator coil of end grouting adhesive generator |
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| 大型汽轮发电机定子接地故障及处理方案;刘玉帅;许铭洋;;防爆电机;20160910(05);全文 * |
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