CN113953763A - Technological method for machining main shaft coupling shaft hole repaired in hydropower station - Google Patents
Technological method for machining main shaft coupling shaft hole repaired in hydropower station Download PDFInfo
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- CN113953763A CN113953763A CN202111231088.4A CN202111231088A CN113953763A CN 113953763 A CN113953763 A CN 113953763A CN 202111231088 A CN202111231088 A CN 202111231088A CN 113953763 A CN113953763 A CN 113953763A
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- 230000008878 coupling Effects 0.000 title claims abstract description 70
- 238000010168 coupling process Methods 0.000 title claims abstract description 70
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 70
- 238000000034 method Methods 0.000 title claims abstract description 51
- 238000003754 machining Methods 0.000 title claims abstract description 23
- 238000004140 cleaning Methods 0.000 claims abstract description 12
- 238000004519 manufacturing process Methods 0.000 claims abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 238000010276 construction Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000003672 processing method Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000012459 cleaning agent Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
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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
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
Abstract
The invention discloses a process method for machining a main shaft coupling hole for repairing a hydropower station, in particular to a process method for machining a coupling hole by a new shaft when one of two coupling assembly main shafts is repaired and replaced in the hydropower station. The method comprises the following steps: cleaning and measuring, manufacturing a boring jig, assembling the boring jig on an old shaft, processing a hole by aligning the boring jig, disassembling the boring jig for the first time, assembling the boring jig on a new shaft, processing a shaft coupling hole of the new shaft, and disassembling the boring jig for the second time. The method uses a new boring jig structural form and a new process method, accurately transplants the position of the old shaft hole onto the new shaft, and controls the deviation of the position degree to be phi 0.03mm, thereby realizing a technical mode of processing the coupling shaft hole with high precision and avoiding the condition that two coupling main shafts cannot be assembled due to large deviation of the position degree of the coupling shaft hole. The invention has the characteristics of high processing precision, simple implementation mode, lower cost and strong universality.
Description
Technical Field
The invention relates to a process method for machining a main shaft coupling hole in a repairing hydropower station, in particular to a process method for machining a coupling hole by a new shaft when one of two coupling assembly main shafts is repaired and replaced in the hydropower station.
Background
The main shaft of the water turbine and the main shaft of the generator are important parts in the water turbine generator set, and the rotating wheel of the water turbine is connected with the rotor of the generator to transmit torque, so that the key function of converting the energy of water flow into rotary mechanical energy is achieved.
Two coupling main shafts of the hydroelectric generating set are used as key components for transmitting torque and ensuring the operation stability of the hydroelectric generating set, and the two coupling main shafts can be used as key inspection items when the hydroelectric generating set is periodically overhauled. However, due to the influence of various factors such as forging problems, machining errors, fatigue accumulation, power station operation states or emergency situations and the like, one main shaft is likely to reach the service life first and need to be replaced by a new shaft, and the other shaft still continues to be replaced by an old shaft. Under the condition, when two coupling main shafts transmit torque through pins, how to accurately copy the positions of the coupling holes of the old shaft to be replaced when a new shaft coupling hole is processed is achieved, and finally the problem that the coupling pin holes of the new shaft and the old shaft of the power station have good coaxiality is always difficult to repair the main shafts. Because the shaft connecting hole coaxiality is big if the deviation is big, the pin can not be assembled, even if there is a small deviation which does not influence the assembly to a certain extent, after the pin is assembled, the pin can bear a larger shearing force when the unit operates, so that the service life is shortened, and the unit is easy to generate a larger potential safety hazard.
Generally, when a coupling hole of a new shaft is machined, a numerical control boring machine is used for recording a numerical control program for operating the position of the coupling hole of the old shaft to be replaced, and then when the coupling hole of the new shaft is machined, the numerical control program for operating the position of the coupling hole of the old shaft is used for machining. The traditional scheme completely depends on the precision of a numerical control machine tool for the coaxiality of the coupling holes, and is not accurate enough, because the accumulated deviation of the position data of each coupling hole of the circumference is recorded by utilizing the numerical control, even if the coupling holes are roughly machined once in the middle, the deviation of the coaxiality of the actually-measured coupling holes and the old shaft is measured, and then the position of a numerical control program is revised according to the deviation value, so that the coaxiality can not reach the precision of 0.05 mm.
Therefore, in order to solve the above problems, it is necessary to provide a machining method which has high machining accuracy, simple embodiment, low cost, and high versatility and is suitable for all coupling holes which cannot be bored simultaneously, in a case where an old shaft hole position needs to be transplanted to a new shaft with high accuracy.
Disclosure of Invention
In view of the above, the present invention aims to provide a high-precision processing method for a repair main shaft coupling hole of a hydropower station, and particularly to a processing method for a new shaft processing coupling hole when only one of two coupling assembly main shafts is replaced in the repair of the hydropower station. The technical scheme of the invention is as follows:
a process method for machining a repair main shaft coupling shaft hole of a hydropower station comprises the following steps:
the method comprises the following steps: cleaning and measuring: cleaning each plane and the round surface of the old shaft, and measuring the diameter tolerance of the round concave spigot of the old shaft;
step two: manufacturing a boring die: processing and manufacturing 1 boring die tool;
step three: assembling a boring die on the old shaft: the boring machine platform on the old shaft is vertically arranged along the direction of the matching surface and the moving direction of the boring shaft; taking the old shaft and the convex and concave rabbets of the boring jig as positioning references, and carrying out assembling and assembling;
step four: and (3) processing a boring jig alignment hole: leveling by a boring lathe according to the matching surface of the boring jig, respectively and independently aligning two coupling holes in the 180-degree direction of the old shaft, and correspondingly reaming two alignment holes of the boring jig; matching and processing a boring die positioning pin according to the diameter size of the alignment hole, and matching and processing the positioning pin after processing; respectively and independently aligning the rest shaft coupling holes, and correspondingly reaming the rest aligned holes of the boring jig;
step five: disassembling the boring die for the first time: the boring jig and the old shaft are disassembled, and the boring jig and the planes and the round surfaces of the new shaft are cleaned;
step six: assembling a boring die on a new shaft: taking the convex spigot circle of the boring die as a positioning reference of the concave spigot circle of the new shaft for assembling;
step seven: processing a new shaft coupling hole: the boring machine uses a dial indicator to level according to the matching surface of the boring jig, respectively and independently aligns two aligning holes in the 180-degree direction of the boring jig, correspondingly processes two shaft connecting holes on a new shaft, and assembles a positioning pin after processing; then, independently aligning according to the remaining boring jig alignment holes, and correspondingly processing the remaining shaft coupling holes of the new shaft;
step eight: disassembling the boring die for the second time: and (4) detaching the boring jig from the new shaft, and cleaning the boring jig and the plane and the round surface of the new shaft.
In the above process method for processing the repair spindle coupling hole of the hydropower station, in the second step, the diameter size and the thickness of the boring jig are set to be in a proportional relation of 15: 1; the convex spigot circle of the boring jig is matched and processed according to the diameter tolerance of the concave spigot of the old shaft; the planeness of the matching surface requires 0.02mm, and the parallelism of the matching surface and the matching surface requires 0.03 mm; the number of the alignment holes of the boring jig is consistent with that of the coupling holes of the old shaft.
In the second step, the single convex spigot circle of the boring jig is not machined, after the hole alignment is machined by the boring jig and the old shaft handle, the center coordinate of the circle is found by numerical control by taking all the alignment holes on the circumference as a reference, and the convex spigot circle with the same size and diameter as the convex spigot circle is machined by the center coordinate.
In the third step, the old shaft coupling shaft hole is aligned with the center of the alignment hole of the boring jig; a boring jig is used for adjusting concentricity, and the gap difference of 4 points uniformly distributed on the circumference is not more than 0.01mm through a gap measuring hole, so that the boring jig and the old shaft are coaxial; the old shaft matching surface C is tightly attached to the matching surface B of the boring jig, no gap is required, and the local maximum is not more than 0.02 mm; the assembly requirements of the new shaft and the boring jig are the same as those of the old shaft and the boring jig.
In the fourth step of the process method for machining the repair main shaft coupling hole of the hydropower station, the boring machine is independently aligned according to the old shaft coupling hole, and the deviation is not more than 0.01 mm.
In the seventh step, the boring machine is independently aligned according to the new shaft coupling hole, and the deviation is not more than 0.01 mm.
The invention has the beneficial effects that:
1. the structure form and the process method of the boring jig are changed by utilizing the usual boring jig processing principle for processing the spindle coupling hole in the past, and a new process method for processing the coupling hole is formed: namely, a boring jig alignment hole is processed by aligning the single hole of the old shaft coupling hole, and a new shaft positioning spigot concentric with the boring jig alignment hole is processed at the station; the new shaft is positioned with the boring jig through the high-precision spigot, and then the new shaft coupling shaft hole is processed by taking the boring jig alignment hole as a reference. Therefore, the position of the old shaft hole is accurately transplanted to the new shaft through a boring jig, in the process, the position deviation relative to the position deviation of the old shaft connecting hole mainly lies in twice single-hole alignment deviation, and in the machining industry, the single-hole alignment deviation of a numerical control machine can be controlled to be 0.01mm, so that the position deviation of the new shaft connecting hole and the old shaft connecting hole can be controlled to be phi 0.03mm, and the technical method for machining the shaft connecting hole with high precision is really realized.
2. The method has the advantages of high processing precision, simple implementation mode, lower cost and strong universality, is suitable for processing all shaft connecting holes which cannot adopt a mode of boring shaft connecting holes simultaneously due to various reasons such as equipment capacity limitation, construction period, field and the like, and can be popularized.
Drawings
FIG. 1 is a sectional view of the boring jig of the present invention.
FIG. 2 is a schematic top view of the boring jig structure of the present invention.
FIG. 3 is a schematic structural view of the old shaft assembled with the boring jig of the present invention.
FIG. 4 is a schematic structural diagram of the new shaft after assembling the boring jig.
FIG. 5 is a schematic view of the positioning pin for assembling the old shaft and the new shaft according to the present invention.
The notation in the figure is: 1-boring a mold; 2-convex spigot circle; 3-measuring clearance holes; 4-boring die thickness; 5-boring die diameter; 6-convex spigot circle; 7-aligning the hole; 8-concave spigot circle; 9-adjusting the concentric device; 10-old shaft; 11-shaft connecting hole; 12-aligning the hole; 13-concave spigot circle; 14-new shaft; 15-shaft connecting hole; 16-a locating pin; a-a mating surface; b-mating surface; c-mating face; d-mating surface.
Detailed Description
The invention is further described with reference to the following figures and detailed description. A process method for processing a main shaft coupling hole of a hydropower station in a repairing way, in particular to a process method for processing a coupling hole by a new shaft when one of two coupling assembly main shafts is repaired and replaced in the hydropower station. The technical scheme is as follows:
the method comprises the following steps: cleaning and measuring: cleaning each plane and round surface of the old shaft 10, and measuring the diameter size tolerance of the concave spigot circle 8 of the old shaft 10;
step two: manufacturing a boring die: processing and manufacturing 1 boring jig 1 tool;
step three: assembling a boring die on the old shaft: the boring machine platform on the old shaft 10 is vertically arranged along the direction of the moving of the boring shaft according to the matching surface C; taking the old shaft 10 and the convex and concave rabbets of the boring jig 1 as positioning references to carry out handle assembly;
step four: and (3) processing a boring jig alignment hole: the boring machine levels according to the matching surface A of the boring jig 1, separately aligns two shaft connecting holes 11 in the 180-degree direction of the old shaft 10, and correspondingly reams two aligning holes 7 of the boring jig 1 into aligning holes 12; processing a boring die positioning pin 16 according to the diameter size of the alignment hole 12, and assembling the positioning pin 16 after processing; then, respectively and independently aligning according to the rest coupling holes 11, and correspondingly reaming the rest alignment holes 7 of the boring jig 1 into alignment holes 12;
step five: disassembling the boring die for the first time: the boring jig 1 and the old shaft 10 are disassembled, and the plane and the round surface of the boring jig 1 and the new shaft 14 are cleaned;
step six: assembling a boring die on a new shaft: taking the male spigot circle 2 of the boring die 1 as a positioning reference for the female spigot circle 13 of the new shaft 14 to carry out handle assembly;
step seven: processing a new shaft coupling hole: the boring machine uses a dial indicator to level according to the matching surface B of the boring jig 1, two alignment holes 12 in the 180-degree direction of the boring jig 1 are respectively and independently aligned, two coupling shaft holes 15 on the new shaft 10 are correspondingly processed, and a positioning pin 16 is assembled after the processing; then, independently aligning according to the alignment holes 12 of the rest boring jigs 1, and correspondingly processing the rest shaft connecting holes 15 of the new shaft 10;
step eight: disassembling the boring die for the second time: and (3) disassembling the boring jig 1 and the new shaft 14, and cleaning the plane and the round surface of the boring jig 1 and the new shaft 14.
The specific embodiment is as follows:
the method is used for explaining the processing process by taking the reconstruction and the overhaul of the main shaft of a hydropower station hydroelectric generating set as an example: the main shaft of the water turbine of the unit does not meet the operation requirement through detection, the main shaft needs to be replaced and manufactured again, and the main shaft of the generator coupled with the main shaft does not need to be replaced and can be continuously used. The main shaft of the water turbine weighs 10800kg, the length 3616mm, the diameter phi of the flange is 1200mm, and 14 shaft coupling holes with the diameter phi of 92mm are used, so that the position degree of a new shaft coupling hole is consistent with that of an old shaft coupling hole as far as possible, the processing is carried out by adopting the invention, and the process is as follows:
1) cleaning an old shaft: cleaning each plane and the round surface of the old shaft 10 completely by using a cleaning agent, and actually measuring the diameter tolerance of the concave spigot circle 8 of the old shaft 10 by using an inside micrometer;
2) manufacturing a boring die:
the diameter size 5 of the boring jig 1 is equal to the diameter phi 1200mm of the main shaft flange, and the thickness 4 is set to be in a proportional relation of 15:1, namely the thickness D is 80 mm; the convex spigot circle 6 of the boring die 1 is matched and processed according to the dimensional tolerance of the actually measured diameter of the concave spigot 8 of the old shaft 10, and the diameter gap between the convex spigot and the concave spigot is set to be 0.02mm-0.08 mm; the planeness of the matching surface B is required to be 0.02mm, and the parallelism of the matching surface A and the matching surface B is required to be 0.03 mm; the number of the alignment holes 7 of the boring jig 1 is consistent with that of the coupling holes 11 of the old shaft 10, and the alignment holes are 14;
the convex spigot circle 2 of the boring jig 1 is not machined when being single, after the boring jig 1 and the old shaft 10 finish machining the alignment holes 12, the center coordinates of the alignment holes 12 on the circumference are numerically controlled and found out by taking all the alignment holes 12 as the reference, and the convex spigot circle 2 with the same size and diameter as the convex spigot circle 6 is machined by the center coordinates;
3) assembling a boring die on the old shaft: the boring machine platform on the old shaft 10 is vertically arranged along the moving direction of the boring shaft of the boring machine according to the matching surface C. Taking the old shaft 10 and the convex and concave rabbets of the boring jig 1 as positioning references, carrying out assembling and assembling, and meeting the assembling requirements: the old shaft 10 shaft connecting hole 11 is aligned with the center of the alignment hole 7 of the boring jig 1; 4 groups of boring jig concentric adjusting devices 9 are uniformly distributed on the circumference, and the clearance between the convex spigot circle 6 and the concave spigot circle 8 is measured through the clearance measuring holes 3, so that the difference of the 4-point clearance is not more than 0.01mm, and the boring jig 1 and the old shaft 10 are ensured to be coaxial; the matching surface C of the old shaft 10 is tightly attached to the matching surface B of the boring jig 1, no gap is required, and the local maximum is not more than 0.02 mm;
4) and (3) processing a boring jig alignment hole: the leveling deviation of the boring machine is 0.01mm according to the matching surface A of the boring jig 1; the boring machine respectively and independently aligns two shaft connecting holes 11 in the 180-degree direction of the old shaft 10, the deviation is required to be 0.01mm, and the two aligning holes 7 of the boring jig 1 are correspondingly reamed and processed into aligning holes 12 after the aligning holes are qualified;
processing a boring die positioning pin 16 according to the diameter size of the alignment hole 12, wherein the gap requirement of a matching machine is 0.01mm-0.03mm, and assembling the old shaft 10 and the positioning pin 16 of the boring die 1 after processing; then, respectively and independently aligning according to the rest coupling holes 11, and correspondingly reaming the rest alignment holes 7 of the boring jig 1 into alignment holes 12;
5) disassembling the boring die for the first time: the boring jig 1 and the old shaft 10 are disassembled, and the plane and the round surface of the boring jig 1 and the new shaft 14 are cleaned;
6) assembling a boring die on a new shaft: assembling the convex spigot circle 2 of the boring jig 1 as a positioning reference of the concave spigot circle 13 of the new shaft 14, wherein the assembling requirements are the same as the assembling requirements of the old shaft 10 and the boring jig 1 according to the step 3;
7) processing a new shaft coupling hole: the boring machine uses a dial indicator to make level deviation of 0.01mm according to the matching surface B of the boring die 1; respectively and independently aligning two alignment holes 12 in the 180-degree direction of the boring jig 1, requiring the deviation of 0.01mm, correspondingly processing two shaft connecting holes 15 on the new shaft 10 after the alignment holes are qualified, and assembling a new shaft 14 and a positioning pin 16 of the boring jig 1 after the alignment holes are processed; then, independently aligning according to the alignment holes 12 of the rest boring jigs 1, and correspondingly processing the rest shaft connecting holes 15 of the new shaft 10;
8) disassembling the boring die for the second time: the boring jig 1 and the new shaft 14 are disassembled, and the plane and the round surface of the boring jig 1 and the new shaft 14 are cleaned;
9) measuring the position degree of a main shaft coupling hole coupled with the old shaft 10 by using a laser tracker at a construction site and recording coordinate values; and then measuring the position degree of the coupling hole 15 of the new shaft 14 processed in the manufacturing factory by using a laser tracker, recording coordinate values, and comparing the two groups of coordinate values to be used as an effective detection and verification means for the position degree of the coupling hole 15 of the new shaft 14.
The present invention and the embodiments thereof have been described above by way of example, and the description is not intended to be limiting, and the drawings are only one embodiment of the present invention, and the actual implementation content is not limited thereto. In summary, if those skilled in the art should be informed by the teachings of the present invention, embodiments and examples similar to the above technical solutions should be devised without departing from the spirit of the present invention.
Claims (6)
1. A process method for machining a main shaft coupling shaft hole repaired by a hydropower station is characterized by comprising the following steps:
the method comprises the following steps: cleaning and measuring: cleaning each plane and round surface of the old shaft (10) and measuring the diameter size tolerance of the concave spigot circle (8) of the old shaft (10);
step two: manufacturing a boring die: 1 boring die (1) tool is processed and manufactured;
step three: assembling a boring die on the old shaft: the boring machine platform on the old shaft (10) is vertically arranged along the direction of the matching surface (C) and the moving direction of the boring shaft; taking the old shaft (10) and the convex and concave rabbets of the boring die (1) as positioning references to carry out assembling and assembling;
step four: and (3) processing a boring jig alignment hole: the boring machine levels according to the matching surface (A) of the boring jig (1), two shaft connecting holes (11) in the 180-degree direction of the old shaft (10) are respectively and independently aligned, and two alignment holes (7) of the boring jig (1) are correspondingly reamed and processed into alignment holes (12); a boring die positioning pin (16) is matched and processed according to the diameter size of the alignment hole (12), and the positioning pin (16) is matched and processed; then, respectively and independently aligning the rest shaft coupling holes (11), and correspondingly reaming the rest alignment holes (7) of the boring jig (1) into alignment holes (12);
step five: disassembling the boring die for the first time: the boring jig (1) and the old shaft (10) are disassembled, and the plane and the round surface of the boring jig (1) and the new shaft (14) are cleaned;
step six: assembling a boring die on a new shaft: taking the convex spigot circle (2) of the boring die (1) as a positioning reference of the concave spigot circle (13) of the new shaft (14) to carry out assembly fitting;
step seven: processing a new shaft coupling hole: the boring machine uses a dial indicator to level according to the matching surface (B) of the boring jig (1), two alignment holes (12) in the 180-degree direction of the boring jig (1) are respectively and independently aligned, two coupling shaft holes (15) on a new shaft (10) are correspondingly machined, and positioning pins (16) are assembled after machining; then, independently aligning the alignment holes (12) of the rest boring jigs (1) respectively, and correspondingly processing the rest shaft connecting holes (15) of the new shaft (10);
step eight: disassembling the boring die for the second time: and (3) disassembling the boring jig (1) and the new shaft (14), and cleaning the plane and the round surface of the boring jig (1) and the new shaft (14).
2. The process method for machining the reworked spindle coupling hole of the hydropower station according to claim 1, which is characterized in that: in the second step, the diameter size (5) and the thickness (4) of the boring die (1) are set to be in a proportional relation of 15: 1; the convex spigot circle (6) of the boring jig (1) is matched and processed according to the diameter size tolerance of the concave spigot (8) of the old shaft (10); the planeness of the matching surface (B) is required to be 0.02mm, and the parallelism of the matching surface (A) and the matching surface (B) is required to be 0.03 mm; the number of the alignment holes (7) of the boring jig (1) is consistent with that of the coupling holes (11) of the old shaft (10).
3. The process method for machining the reworked spindle coupling hole of the hydropower station according to claim 1, which is characterized in that: in the second step, the convex spigot circle (2) of the boring jig (1) is not machined when being single, after the boring jig (1) and the old shaft (10) finish machining the alignment holes (12), the center coordinates of the alignment holes (12) are numerically controlled by taking all the alignment holes (12) on the circumference as the reference, and the convex spigot circle (2) with the same size and diameter as the convex spigot circle (6) is machined by the center coordinates.
4. The process method for machining the reworked spindle coupling hole of the hydropower station according to claim 1, which is characterized in that: in the third step, the old shaft (10) connecting shaft hole (11) is aligned with the center of the alignment hole (7) of the boring jig (1); a boring jig concentric adjusting device (9) is used for ensuring that the gap difference of 4 points uniformly distributed on the circumference is not more than 0.01mm through a gap measuring hole (3) and ensuring that the boring jig (1) is coaxial with an old shaft (10); the matching surface C of the old shaft (10) is tightly attached to the matching surface B of the boring jig (1), no clearance is required, and the local maximum is not more than 0.02 mm; the assembly requirements of the new shaft (14) and the boring jig (1) are the same as those of the old shaft (10) and the boring jig (1).
5. The process method for machining the reworked spindle coupling hole of the hydropower station according to claim 1, which is characterized in that: in the fourth step, the boring machine is independently aligned according to the old shaft (10) and the shaft connecting hole (11), and the deviation is not more than 0.01 mm.
6. The process method for machining the reworked spindle coupling hole of the hydropower station according to claim 1, which is characterized in that: and seventhly, aligning the boring machine according to the new shaft (14) and the shaft connecting hole (15) independently, wherein the deviation is not more than 0.01 mm.
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| CN202111231088.4A CN113953763B (en) | 2021-10-22 | 2021-10-22 | Technological method for machining spindle connecting hole of repair spindle of hydropower station |
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| CN202111231088.4A CN113953763B (en) | 2021-10-22 | 2021-10-22 | Technological method for machining spindle connecting hole of repair spindle of hydropower station |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114799758A (en) * | 2022-05-06 | 2022-07-29 | 重庆水轮机厂有限责任公司 | Processing technology for fine matching connecting hole of water pump spindle and motor spindle |
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| JP2001062620A (en) * | 1999-08-30 | 2001-03-13 | Mitsubishi Automob Eng Co Ltd | Boring device |
| CN107914114A (en) * | 2017-11-14 | 2018-04-17 | 陕西品达石化有限公司 | The processing method of super-huge spiral classifier main shaft |
| CN111958012A (en) * | 2020-08-18 | 2020-11-20 | 哈尔滨电机厂有限责任公司 | Method for guaranteeing precision of shaft coupling and shaft hole boring |
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2021
- 2021-10-22 CN CN202111231088.4A patent/CN113953763B/en active Active
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| JP2001062620A (en) * | 1999-08-30 | 2001-03-13 | Mitsubishi Automob Eng Co Ltd | Boring device |
| CN107914114A (en) * | 2017-11-14 | 2018-04-17 | 陕西品达石化有限公司 | The processing method of super-huge spiral classifier main shaft |
| CN111958012A (en) * | 2020-08-18 | 2020-11-20 | 哈尔滨电机厂有限责任公司 | Method for guaranteeing precision of shaft coupling and shaft hole boring |
Non-Patent Citations (1)
| Title |
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| 安华;: "水轮机主轴与转轮镗模的设计", 机械工程师, no. 02, pages 139 - 140 * |
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| CN114799758A (en) * | 2022-05-06 | 2022-07-29 | 重庆水轮机厂有限责任公司 | Processing technology for fine matching connecting hole of water pump spindle and motor spindle |
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