CN112383200B - Process method for correcting skew of stator positioning rib of hydraulic generator - Google Patents
Process method for correcting skew of stator positioning rib of hydraulic generator Download PDFInfo
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- CN112383200B CN112383200B CN202011284207.8A CN202011284207A CN112383200B CN 112383200 B CN112383200 B CN 112383200B CN 202011284207 A CN202011284207 A CN 202011284207A CN 112383200 B CN112383200 B CN 112383200B
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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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- 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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Abstract
The invention discloses a technological method for correcting skew of a stator positioning rib of a hydraulic generator. The invention relates to an innovation of a positioning rib skew correction process method, which is an essential change of the correction method. By using the process method, the skew of the positioning rib can be effectively corrected at the installation station, and the process method is first applied to the skew correction of the positioning rib. The special locating rib skew correction tool is designed and manufactured, the installation size of the locating rib is accurately adjusted by utilizing the adjusting screw on the tool, and meanwhile, the effect of reinforcing during welding and controlling welding deformation can be achieved. The positioning ribs meet various requirements after adjustment and welding. The method helps correct the positioning rib skew by adjusting the welding sequence, thereby improving the positioning rib skew correction effect. The invention carries out the skew adjustment of the positioning rib at the installation station, replaces the traditional factory return treatment, improves the treatment efficiency and reduces the installation period.
Description
Technical Field
The invention relates to the technical field of hydraulic generator stator installation, in particular to a technological method for correcting the skew of a hydraulic generator stator positioning rib.
Background
The stator of the large hydraulic generator needs to be assembled on site, and the assembling process comprises the steps of stator base assembling, stator positioning rib assembling and welding, stator core stacking, stator winding embedding and the like. The inner diameter roundness of the stator plays an important role in indexes such as vibration and stability during the operation of the unit. The positioning ribs are used as positioning reference of the stator punching sheet, and the final circularity value of the whole stator is determined. At present, most of positioning ribs are formed by drawing, and the deviation of the positioning ribs exceeds the standard due to stress release, transportation deformation and other reasons when the positioning ribs are used on a construction site. Because no skew correction device is arranged on site, unqualified positioning ribs need to be returned to a manufacturing plant for processing, the cost of the manufacturing plant is increased, and meanwhile, the installation period is delayed.
Disclosure of Invention
In view of this, the invention aims to provide a process method for correcting the skew of the positioning rib of the stator of the hydraulic generator, which corrects the positioning rib with the skew value exceeding the standard by manufacturing a special positioning rib skew correction tool and reasonably arranging the adjustment sequence and the adjustment method of each ring of the positioning rib. The technical scheme of the invention is as follows:
1) Installing and coarsely adjusting the positioning rib (2): installing a positioning rib (2) with a skew value larger than 0.2mm on a stator base (1), roughly adjusting the radius, skew and chord distance between the positioning rib (2) and an adjacent positioning rib (2), firmly fixing the positioning rib (2) and a supporting block (3) by using a wedge and a gasket, and temporarily fixing the positioning rib and the supporting block on the stator base (1) by using a supporting block jacking column (4) and a double-end jacking column;
2) Fine adjustment positioning rib (2): adjusting the radius, the skew and the chord distance between the positioning ribs (2) at the top ring and the third layer of ring plate of the stator base (1) and the adjacent positioning ribs, wherein the radius value is adjusted to be smaller than 0.1mm from the theoretical size, the skew value is adjusted to be smaller than 0.1mm, the chord distance value between the positioning ribs and the adjacent positioning ribs is adjusted to be smaller than 0.15mm from the average size, the skew values of the positioning ribs at the top ring and the third layer of ring plate of the stator base (1) are adjusted to be within the qualified range of 0.1mm, the skew directions of the positioning ribs (2) at the bottom ring and the second layer of ring plate of the stator base (1) are opposite, the skew value is larger than 0.1mm, the positioning ribs (2) and the support blocks (3) are firmly fixed on the stator base (1) again, the support blocks (3) at the top ring and the third layer of ring plate of the stator base (1) are fixed by spot welding, and two points of the support blocks (3) are welded;
3) Installing a positioning rib correcting tool (5): sleeving a positioning rib correcting tool (5) on the outer side of a supporting block (3), fixing the positioning rib correcting tool (5) on a stator base (1) by using a supporting block jacking column (4), fixing two points at each spot welding point on the left side and the right side of a correcting tool frame body (6), and screwing a circumferential adjusting bolt (7), an inner side adjusting bolt (8) and a back adjusting bolt (9) on the positioning rib correcting tool (5);
4) The radius, the skew and the chord length of the positioning rib (2) at the bottom ring position of the stator base (1) are measured, the skew deformation of the positioning rib (2) at the bottom ring position of the stator base (1) is corrected by utilizing an inner side adjusting bolt (8) and a back adjusting bolt (9) of a positioning rib correcting tool (5), and the circumferential position of the positioning rib (2) is adjusted and fixed by utilizing a circumferential adjusting bolt (7). During adjustment, the position change of the positioning rib (2) is monitored by using a stator circle measuring frame and a dial indicator, and the radius value of the positioning rib (2) is adjusted to be less than 0.1mm different from the theoretical radius value; adjusting the chord distance value between the adjacent positioning ribs to be less than 0.15mm different from the average chord sawing value; after the skew value is adjusted to be within the qualified range of less than 0.1mm, the inner side adjusting bolt (8) and the back adjusting bolt (9) are continuously adjusted until the positioning rib is subjected to skew deformation by 0.05mm in the direction opposite to the original skew deformation direction;
5) And (3) measuring the radius, the skew and the chord distance value of the positioning rib (2) at the second layer of ring plate of the stator base (1), if the difference between the radius value and the theoretical size is less than 0.1mm, the skew value is less than 0.1mm, and the difference between the chord distance value and the average size of the adjacent positioning rib is less than 0.15mm, determining that all sizes of the positioning rib (2) at the second layer of ring plate of the stator base (1) are qualified, and if the difference is not satisfied, adjusting the radius, the skew and the chord distance value of the adjacent positioning rib of the positioning rib (2) at the second layer of ring plate to be qualified according to the method in the step 4). Then fixing two points on two sides of the supporting block (3) at the second layer of ring plate by spot welding;
6) And (3) re-measuring the radius, skew and chord distance values of the positioning ribs (2) at the bottom ring of the stator base (1). If the difference between the radius value and the theoretical size is less than 0.1mm, the skew value is less than 0.1mm, and the difference between the chord distance value of the positioning rib and the average size is less than 0.15mm, the positioning rib (2) is regarded as qualified in all sizes at the bottom ring of the stator base (1), if the difference is not satisfied, the radius, the skew value and the chord distance value of the positioning rib and the adjacent positioning rib of the positioning rib (2) at the bottom ring of the stator base (1) are adjusted to be qualified according to the method in the step 4), and then two points of each spot welding on two sides of a support block (3) at the bottom ring of the stator base (1) are fixed;
7) After spot welding the bottom ring of the fixed stator base (1) and the supporting block at the second layer of ring plate, placing for 24 hours to fully release stress, then removing the positioning rib correction tool (5), retesting the radius, skew and chord distance values of the positioning rib (2) at the bottom ring of the stator base (1) and the second layer of ring plate, if the radius value and the theoretical size difference are less than 0.1mm, the skew value is less than 0.1mm, and the chord distance value and the average size difference between the adjacent positioning rib are less than 0.15mm, considering that all sizes of the positioning rib (2) at the bottom ring of the stator base (1) and the second layer of ring plate are qualified, if the radius value and the theoretical size difference are not more than 0.1mm, grinding welding spots at two sides of the supporting block, reinstalling the positioning rib correction tool (5), and adjusting all sizes again according to the adjusting method of the step 4) until all sizes are qualified;
8) And (3) full welding of the positioning rib supporting block: and after all the sizes are qualified, all the support blocks (3) of the positioning ribs (2) are fully welded and fixed on the annular plates of all the layers of the stator base (1), the height of a welding leg is 12mm, and the skew correction work of the positioning ribs (2) at an installation station is finished.
Technical effects
Large-scale hydraulic generator stator needs to install at the building site scene, and the location muscle is higher as stator core's benchmark, and the dress welds back dimensional accuracy requirement, and the skew overproof of location muscle leads to the location muscle can't satisfy the requirement after the dress welds, must just can carry out follow-up installation work after correcting qualified.
The invention is suitable for correcting the skew of the stator positioning rib of the hydraulic generator at the installation station. Because no skew correction tool is arranged on the installation site, the skew of the positioning ribs needs to be corrected by returning to a manufacturing factory, and the possibility of skew deformation still exists after transportation.
The invention relates to an innovation of a positioning rib skew correction process method, which is an essential change of a correction method. By using the process method, the skew of the positioning rib can be effectively corrected at the installation station. The special locating rib skew correction tool is designed and manufactured, the installation size of the locating rib is accurately adjusted by utilizing the adjusting screw on the tool, and meanwhile, the effect of reinforcing during welding and controlling welding deformation can be achieved. The positioning ribs meet various requirements after adjustment and welding.
The method utilizes the welding deformation to assist in correcting the skew of the positioning rib, and the positioning rib deforms in the direction opposite to the skew during welding by reasonably arranging the welding sequence, so that the skew correction effect of the positioning rib is improved.
The invention carries out the skew adjustment of the positioning rib at the installation station, replaces the traditional factory return treatment, improves the treatment efficiency and reduces the installation period.
Drawings
FIG. 1 is a schematic diagram of a process for correcting skew of a positioning rib at an installation station
FIG. 2 is a schematic view of a dedicated tool for correcting the skew of a positioning rib
In the attached drawings
1-a stator frame; 2-positioning ribs;
3, supporting a block; 4-supporting the block top column;
5-positioning a rib correction tool; 6-a correction tool frame;
7-circumferential adjusting bolts; 8-inner measuring and adjusting bolt;
9-back adjusting bolt.
Detailed Description
As shown in fig. 1 and 2, the invention provides a technological method for correcting the skew of the positioning rib of the stator of the hydraulic generator, and the positioning rib deformed by the skew is corrected at the installation station, so that the additional production, transportation cost and installation period caused by the return of the positioning rib to a factory for repair are saved. The technical scheme of the invention is as follows:
1) Installing and roughly adjusting the positioning ribs 2: installing a positioning rib 2 with a skew value larger than 0.2mm on a stator base 1, roughly adjusting the radius, skew and chord distance between the positioning rib 2 and an adjacent positioning rib 2, firmly fixing the positioning rib 2 and a supporting block 3 by using a wedge and a gasket, and temporarily fixing the positioning rib and the supporting block on the stator base 1 by using a supporting block supporting column 4 and a double-end supporting column;
2) Fine adjustment of the positioning ribs 2: adjusting the radius, the skew and the chord distance between the positioning ribs 2 at the top ring and the third layer of ring plate of the stator base 1 and the adjacent positioning ribs, wherein the radius value is adjusted to be less than 0.1mm from the theoretical size, the skew value is adjusted to be less than 0.1mm, the chord distance value between the positioning ribs and the adjacent positioning ribs is adjusted to be less than 0.15mm from the average size, the skew values of the positioning ribs and the third layer of ring plate of the stator base 1 are adjusted to be within a qualified range of 0.1mm, the skew directions of the positioning ribs 2 at the bottom ring and the second layer of ring plate of the stator base 1 are opposite, the skew value is more than 0.1mm, the positioning ribs 2 and the support blocks 3 are firmly fixed on the stator base 1 again, the top ring of the stator base 1 and the support blocks 3 at the third layer of ring plate are fixed by spot welding, and two points are respectively welded at two sides of the support blocks 3;
3) Installing and positioning rib straightening tool 5: sleeving a positioning rib correcting tool 5 on the outer side of a supporting block 3, fixing the positioning rib correcting tool 5 on a stator base 1 by using a supporting block top column 4, fixing two points at each spot welding point on the left side and the right side of a correcting tool frame body 6, and screwing a circumferential adjusting bolt 7, an inner side adjusting bolt 8 and a back adjusting bolt 9 on the positioning rib correcting tool 5;
4) The radius, skew and chord length of the positioning rib 2 at the bottom ring position of the stator base 1 are measured, the skew deformation of the positioning rib 2 at the bottom ring position of the stator base 1 is corrected by utilizing an inner side adjusting bolt 8 and a back adjusting bolt 9 of the positioning rib correcting tool 5, and the circumferential position of the positioning rib 2 is adjusted and fixed by utilizing a circumferential adjusting bolt 7. During adjustment, the stator circle measuring frame and the dial indicator are used for monitoring the position change of the positioning rib 2, and the radius value of the positioning rib 2 is adjusted until the difference value with the theoretical radius value is less than 0.1mm; adjusting the chord distance value between the adjacent positioning ribs to be less than 0.15mm different from the average chord saw value; after the skew value is adjusted to be within the qualified range of less than 0.1mm, the inner side adjusting bolt 8 and the back adjusting bolt 9 are continuously adjusted until the positioning rib is subjected to skew deformation by 0.05mm in the direction opposite to the original skew deformation direction;
5) And (3) measuring the radius, the skew and the chord distance value of the positioning rib 2 at the second layer of ring plate of the stator base 1, if the difference value between the radius value and the theoretical size is less than 0.1mm, the skew value is less than 0.1mm, and the difference value between the chord distance value of the positioning rib 2 and the average size is less than 0.15mm, determining that all sizes of the positioning rib 2 at the second layer of ring plate of the stator base 1 are qualified, and if the difference value is not satisfied, adjusting the radius, the skew and the chord distance value of the positioning rib 2 at the second layer of ring plate and the chord distance value of the adjacent positioning rib to be qualified according to the method in the step 4). Then fixing two points on two sides of the supporting block 3 at the second layer of ring plate by spot welding;
6) And (3) re-measuring the radius, skew and chord distance values of the positioning ribs 2 at the bottom ring of the stator base 1. If the difference between the radius value and the theoretical size is less than 0.1mm, the skew value is less than 0.1mm, and the difference between the chord distance value between the radius value and the theoretical size of the positioning rib and the average size of the positioning rib is less than 0.15mm, the positioning rib 2 is regarded as qualified in all sizes at the bottom ring of the stator base 1, if the difference is not satisfied, the radius, the skew value and the chord distance value between the positioning rib 2 and the adjacent positioning rib at the bottom ring of the stator base 1 are adjusted to be qualified according to the method in the step 4), and then two points are fixed by spot welding at two sides of the support block 3 at the bottom ring of the stator base 1;
7) After the supporting blocks at the bottom ring of the stator base 1 and the second layer of ring plate are fixed in a spot welding mode, the supporting blocks are placed for 24 hours to fully release stress, then the positioning rib correcting tool 5 is dismounted, the radius, the skew and the chord distance of the positioning rib 2 at the bottom ring of the stator base 1 and the second layer of ring plate are retested, if the difference value between the radius value and the theoretical size is less than 0.1mm, the skew value is less than 0.1mm and the difference value between the chord distance value of the adjacent positioning rib and the average size is less than 0.15mm, the sizes of the positioning rib 2 at the bottom ring of the stator base 1 and the second layer of ring plate are considered to be qualified, if the sizes are unqualified, the spot welding spots at the two sides of the supporting blocks are removed, the positioning rib correcting tool 5 is remounted, and the sizes are adjusted again according to the adjusting method in the step 4) until all the sizes are qualified;
8) And (3) full welding of the positioning rib supporting block: and after all the sizes are qualified, all the support blocks 3 of the positioning ribs 2 are fixed on each layer of annular plate of the stator base 1 by full welding, the height of a welding leg is 12mm, and the skew correction work of the positioning ribs 2 at the installation station is finished.
As shown in figure 1, the operation process of correcting the skew of the positioning rib by using the tool at the installation station relates to a stator frame 1, a positioning rib 2, a supporting block 3, a supporting block top column 4 and a positioning rib correcting tool 5.
Fig. 2 is a schematic view of the positioning rib straightening tool, which is composed of a straightening tool frame 6, a circumferential adjusting bolt 7, an inner measuring and adjusting bolt 8, and a back adjusting bolt 9. When in use, the positioning ribs are rotated by utilizing the adjusting bolts 7, 8 and 9, so that the aim of correcting skew at an installation station is fulfilled.
Equipment is needed:
stator circle measuring rack
Dial indicator
Jack
Wedge iron
Positioning rib double-head top column
Welding equipment and welding material
Shim
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (1)
1. A technological method for correcting the skew of a stator positioning rib of a hydraulic generator is characterized by comprising the following steps:
1) Installing and coarsely adjusting the positioning rib (2): installing a positioning rib (2) with a skew value larger than 0.2mm on a stator base (1), roughly adjusting the radius, skew and chord distance between the positioning rib (2) and an adjacent positioning rib (2), firmly fixing the positioning rib (2) and a supporting block (3) by using a wedge and a gasket, and temporarily fixing the positioning rib and the supporting block on the stator base (1) by using a supporting block jacking column (4) and a double-end jacking column;
2) Fine adjustment positioning rib (2): adjusting the radius, the skew and the chord distance between the positioning rib (2) and the adjacent positioning rib at the top ring and the third layer of ring plate of the stator base (1), wherein the radius value is adjusted to be less than 0.1mm from the theoretical size, the skew value is adjusted to be less than 0.1mm, the chord distance value between the positioning rib and the adjacent positioning rib is adjusted to be less than 0.15mm from the average size, the skew values of the positioning rib at the top ring and the third layer of ring plate of the stator base (1) are adjusted to be within the qualified range of 0.1mm, the skew directions of the positioning rib (2) at the bottom ring and the second layer of ring plate of the stator base (1) are opposite, the skew value is greater than 0.1mm, the positioning rib (2) and the support block (3) are firmly fixed on the stator base (1) again, the support block (3) at the top ring and the third layer of ring plate of the stator base (1) are fixed through spot welding, and two points at two sides of the support block (3) are welded;
3) Installing a positioning rib correcting tool (5): sleeving a positioning rib correcting tool (5) on the outer side of a supporting block (3), fixing the positioning rib correcting tool (5) on a stator base (1) by using a supporting block jacking column (4), fixing two points at each spot welding point on the left side and the right side of a correcting tool frame body (6), and screwing a circumferential adjusting bolt (7), an inner side adjusting bolt (8) and a back adjusting bolt (9) on the positioning rib correcting tool (5);
4) Measuring the radius, skew and chord length of the positioning rib (2) at the bottom ring position of the stator base (1), correcting skew deformation of the positioning rib (2) at the bottom ring position of the stator base (1) by using an inner side adjusting bolt (8) and a back adjusting bolt (9) of a positioning rib correcting tool (5), adjusting and fixing the circumferential position of the positioning rib (2) by using a circumferential adjusting bolt (7), monitoring the position change of the positioning rib (2) by using a stator circle measuring frame and a dial indicator during adjustment, and adjusting the radius value of the positioning rib (2) until the difference value with the theoretical radius value is less than 0.1mm; adjusting the chord distance value between the adjacent positioning ribs to be less than 0.15mm different from the average chord sawing value; after the skew value is adjusted to be within the qualified range of less than 0.1mm, the inner side adjusting bolt (8) and the back adjusting bolt (9) are continuously adjusted until the positioning rib is subjected to skew deformation by 0.05mm in the direction opposite to the original skew deformation direction;
5) Measuring the radius, the skew and the chord distance value of the positioning rib (2) at the second layer of ring plate of the stator base (1), if the difference between the radius value and the theoretical size is less than 0.1mm, the skew value is less than 0.1mm, and the difference between the chord distance value and the average size of the adjacent positioning rib is less than 0.15mm, determining that the sizes of the positioning rib (2) at the second layer of ring plate of the stator base (1) are qualified, if the difference is not satisfied, adjusting the radius, the skew and the chord distance value of the adjacent positioning rib of the positioning rib (2) at the second layer of ring plate to be qualified according to the method of the step 4), and then fixing two points at two sides of the support block (3) at the second layer of ring plate by spot welding;
6) Re-measuring the radius, skew and chord distance values of the positioning ribs (2) at the bottom ring of the stator base (1), if the difference between the radius value and the theoretical size is less than 0.1mm, the skew value is less than 0.1mm and the difference between the chord distance value of the positioning ribs adjacent to the positioning ribs and the average size is less than 0.15mm, determining that the sizes of the positioning ribs (2) at the bottom ring of the stator base (1) are qualified, if the difference between the radius value and the theoretical size is not more than 0.1mm, adjusting the radius, the skew and the chord distance value of the positioning ribs adjacent to the positioning ribs of the positioning ribs (2) at the bottom ring of the stator base (1) to be qualified according to the method in the step 4), and then fixing two points at two sides of the support block (3) at the bottom ring of the stator base (1) by spot welding;
7) After spot welding the bottom ring of the fixed stator base (1) and the supporting block at the second layer of ring plate, placing for 24 hours to fully release stress, then removing the positioning rib correction tool (5), retesting the radius, skew and chord distance values of the positioning rib (2) at the bottom ring of the stator base (1) and the second layer of ring plate, if the radius value and the theoretical size difference are less than 0.1mm, the skew value is less than 0.1mm, and the chord distance value and the average size difference between the adjacent positioning rib are less than 0.15mm, considering that all sizes of the positioning rib (2) at the bottom ring of the stator base (1) and the second layer of ring plate are qualified, if the radius value and the theoretical size difference are not more than 0.1mm, grinding welding spots at two sides of the supporting block, reinstalling the positioning rib correction tool (5), and adjusting all sizes again according to the adjusting method of the step 4) until all sizes are qualified;
8) And (3) full welding of the positioning rib supporting block: and after all the sizes are qualified, all the support blocks (3) of the positioning ribs (2) are fixed on each layer of annular plate of the stator base (1) in a full-welding mode, the height of a welding leg is 12mm, and the skew correction work of the positioning ribs (2) at the installation station is finished.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011284207.8A CN112383200B (en) | 2020-11-17 | 2020-11-17 | Process method for correcting skew of stator positioning rib of hydraulic generator |
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| CN202011284207.8A CN112383200B (en) | 2020-11-17 | 2020-11-17 | Process method for correcting skew of stator positioning rib of hydraulic generator |
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| CN112383200B true CN112383200B (en) | 2022-10-25 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE3227622A1 (en) * | 1982-07-23 | 1984-01-26 | Nustep Trenndüsen Entwicklungs- und Patentverwertungsgesellschaft mbH & Co KG, 4300 Essen | SEPARATING ELEMENT FOR SEPARATING GAS-SHAPED ISOTOPES IN AT LEAST TWO FRACTIONS AND SEPARATING BASKET CONSTRUCTED WITH SEVERAL SEPARATING ELEMENTS |
| CN101093950A (en) * | 2007-07-24 | 2007-12-26 | 天津市天发重型水电设备制造有限公司 | Technique for assembling magnet yoke of rotor in large and medium size mixed flow, axial flow hydroelectric machine |
| CN101758323A (en) * | 2009-11-27 | 2010-06-30 | 哈尔滨电机厂有限责任公司 | Dual-dovetail type unmovable key bar assembling and welding process for water turbine generator |
| CN101800457B (en) * | 2010-03-22 | 2012-07-04 | 天津市天发重型水电设备制造有限公司 | Method for weaving welding of positioning rib supporting block of hydraulic generator stator V-shaped rib base |
| CN105945483A (en) * | 2016-06-20 | 2016-09-21 | 哈尔滨电机厂有限责任公司 | Before-welding adjustment and alignment process for positioning ribs of turbine generator |
| CN210536462U (en) * | 2019-11-21 | 2020-05-15 | 中国水利水电第七工程局有限公司 | Rapid adjusting tool for stator positioning rib of hydraulic generator |
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