CN113953763B - Technological method for machining spindle connecting hole of repair spindle of hydropower station - Google Patents
Technological method for machining spindle connecting hole of repair spindle of hydropower station Download PDFInfo
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- CN113953763B CN113953763B CN202111231088.4A CN202111231088A CN113953763B CN 113953763 B CN113953763 B CN 113953763B CN 202111231088 A CN202111231088 A CN 202111231088A CN 113953763 B CN113953763 B CN 113953763B
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- 238000000034 method Methods 0.000 title claims abstract description 51
- 238000003754 machining Methods 0.000 title claims abstract description 33
- 230000008439 repair process Effects 0.000 title claims abstract description 15
- 230000008878 coupling Effects 0.000 claims abstract description 52
- 238000010168 coupling process Methods 0.000 claims abstract description 52
- 238000005859 coupling reaction Methods 0.000 claims abstract description 52
- 238000012545 processing Methods 0.000 claims abstract description 33
- 230000008569 process Effects 0.000 claims abstract description 28
- 238000004140 cleaning Methods 0.000 claims abstract description 13
- 238000004519 manufacturing process Methods 0.000 claims abstract description 5
- 238000000465 moulding Methods 0.000 claims description 4
- 230000020347 spindle assembly Effects 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000010276 construction 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
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Classifications
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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 spindle hole of a repair spindle of a hydropower station, in particular to a process method for machining a spindle hole of a new spindle when one of two spindle assembly spindles is repaired and replaced by the hydropower station. The method comprises the following steps: cleaning and measuring, boring die manufacturing, old shaft assembling boring die, boring die aligning hole machining, first boring die disassembling, new shaft assembling boring die, new shaft coupling hole machining and second boring die disassembling. The method uses a new boring die structural form and a process method, accurately transplants the position of the old shaft hole to the new shaft, controls the position deviation to be phi 0.03mm, realizes a technical mode of processing the shaft coupling hole with high precision, and avoids the situation that two shaft coupling main shafts cannot be assembled due to larger position deviation of the processed shaft coupling 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 spindle hole of a repair spindle of a hydropower station, in particular to a process method for machining a spindle hole of a new spindle when one of two spindle assembly spindles is repaired and replaced by 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 are used for connecting the rotating wheel of the water turbine with the rotor of the generator to transfer torque, so that the key effect 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 guaranteeing running stability of the hydroelectric generating set, and when the hydroelectric station overhauls the hydroelectric generating set regularly, the two coupling main shafts are used as key inspection items. However, due to the influence of various factors such as forging problems, machining errors, fatigue accumulation, running states of a power station or emergency conditions, the possibility is high that one of the main shafts reaches the service life first and needs to be replaced by a new shaft, while the other shaft is not replaced along the old shaft. Under the condition, when two coupling main shafts transmit torque through the pin, how to accurately copy the position of the old shaft coupling hole to be replaced when the new shaft coupling hole is machined, and finally, the good coaxiality of the new shaft and the coupling pin hole of the old shaft of the power station is ensured, which is always a difficult problem of main shaft repair. Because the coaxiality of the shaft connecting hole is larger if the deviation is larger, the pin cannot be assembled, even if smaller deviation which does not affect the assembly to a certain extent exists, after the pin is assembled, the pin can bear larger shearing force when the unit operates, so that the service life is reduced, and larger potential safety hazard is easily generated to the unit.
In general, a numerical control boring machine is used for recording the operation numerical control program of the old shaft coupling hole position to be replaced when a new shaft coupling hole is machined, and then the numerical control position program of the old shaft coupling hole is utilized for machining when the new shaft coupling hole is machined. The traditional scheme is not accurate enough for the coaxiality of the coupling holes, completely depends on the precision of a numerical control machine tool, because the accumulated deviation of the position data of each coupling hole on the circumference of the numerical control record is large, even if the coupling hole is roughly processed once in the middle, the coaxiality deviation of the coupling hole and the old shaft is actually measured, and then the position of the numerical control program is revised according to the deviation value, the precision of coaxiality of 0.05mm cannot be achieved.
Therefore, in order to solve the above-mentioned problems, it is necessary to provide a machining method which has high machining accuracy, simple embodiment, low cost and strong versatility, and is suitable for all coupling holes which cannot be used in the same boring coupling hole method, in order to solve the problem that the old shaft hole position needs to be transplanted to the new shaft with high accuracy.
Disclosure of Invention
In view of the above, the present invention aims to provide a process method for processing a spindle hole of a repair spindle of a hydropower station with high precision, and in particular to a process method for processing a spindle hole of a new spindle when only one spindle of two coupling assembly spindles is replaced for the repair of the hydropower station. The technical scheme of the invention is as follows:
the technological process of machining spindle connecting hole for repairing hydropower station includes the following steps:
step one: cleaning and measuring: cleaning each plane and round surface of the old shaft, and measuring the dimensional tolerance of the diameter of the concave spigot of the old shaft;
step two: boring and molding: machining and manufacturing 1 boring die tool;
step three: old shaft assembly boring die: the boring machine platform on the old shaft is placed vertically with the moving direction of the boring shaft according to the matching surface; taking the old shaft and the male and female seam allowance of the boring die as positioning references for assembling;
step four: boring die alignment hole processing: leveling the matching surface of the boring machine according to the boring die, and respectively and independently aligning the two coupling holes in the 180-degree direction of the old shaft to correspondingly perform reaming processing on the two alignment holes of the boring die; matching and processing a boring die positioning pin according to the diameter size of the alignment hole, and assembling the positioning pin after processing; then, the remaining coupling holes are respectively aligned independently, and the remaining alignment holes of the boring die are correspondingly reamed;
step five: the boring die is disassembled for the first time: disassembling the boring jig from the old shaft, cleaning each plane and the round surface of the boring jig and the new shaft;
step six: new shaft assembly boring die: taking a convex spigot circle of the boring jig 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 die, and respectively and independently aligns two alignment holes in the 180-degree direction of the boring die, correspondingly processes two coupling holes on a new shaft, and assembles a positioning pin after processing; then, the remaining boring jig alignment holes are respectively aligned singly, and the other connecting shaft holes of the new shaft are correspondingly processed;
step eight: and (3) removing the boring die for the second time: and (3) detaching the boring jig from the new shaft, and cleaning the boring jig, each plane of the new shaft and the round surface.
In the above-mentioned technological method for processing the spindle connecting hole of the repair main shaft of the hydropower station, in the second step, the diameter size and thickness of the boring die are set as the proportional relation of 15:1; the male spigot circle of the boring die is matched and processed according to the diameter and size tolerance of the female spigot of the old shaft; the flatness of the matching surface is required to be 0.02mm, and the parallelism between the matching surface and the matching surface is required to be 0.03mm; 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 piece of the male tang circle of the boring die is not machined, after the boring die and the old shaft pair are combined to machine the alignment hole, the center coordinates of the center are found out by taking all the alignment holes of the circumference as reference numerical control, and the male tang circle with the same size and diameter as the male tang circle is machined by the center coordinates.
In the third step, the old spindle coupling hole is aligned with the center of the boring die alignment hole; the concentric device is adjusted by the boring die, and the gap difference between 4 points uniformly distributed on the circumference is not more than 0.01mm through the gap measuring holes, so that the boring die and the old shaft are coaxial; the old shaft matching surface C is tightly attached to the matching surface B of the boring die, no gap is required, and the local maximum is not more than 0.02mm; the new shaft and die assembly requirements are the same as the old shaft and die assembly requirements.
In the fourth step, the boring machine is used for singly pressing the old shaft coupling Kong Zhaozheng, and the deviation is not more than 0.01mm.
In the seventh step, the boring machine is used for independently coupling Kong Zhaozheng according to the new shaft, and the deviation is not more than 0.01mm.
The beneficial effects of the invention are as follows:
1. the boring die structure form and the process method are changed by utilizing the boring die processing principle commonly used for processing the spindle coupling hole in the past, so that a new process method for processing the spindle coupling hole is formed: the method comprises the steps of aligning an old shaft coupling hole single hole, machining a boring die aligning hole, and machining a new shaft positioning spigot concentric with the boring die aligning hole under the station; the new shaft is positioned with the boring die through the high-precision spigot, and then the new shaft connecting hole is processed by taking the boring die alignment hole as a reference. Therefore, the position of the old shaft hole is accurately transplanted onto the new shaft through the boring die, in the process, the position degree deviation relative to the old shaft hole mainly refers to the two-time single-hole alignment deviation, and in the machining industry, the single-hole alignment deviation of the numerical control machine tool can be controlled to be 0.01mm, so that the position degree deviation of the new shaft hole and the old shaft hole can be controlled to be phi 0.03mm, and the technical method for processing the shaft hole with high precision is truly realized.
2. The method has the advantages of high processing precision, simple implementation mode, lower cost and strong universality, is suitable for processing all coupling holes which cannot adopt the mode of boring the coupling 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 schematic cross-sectional view of a boring die structure according to the present invention.
FIG. 2 is a schematic top view of the boring die structure of the present invention.
FIG. 3 is a schematic view of the structure of the old shaft assembled boring die.
FIG. 4 is a schematic view of the structure of the new shaft assembly boring die of the invention.
FIG. 5 is a schematic view of the structure of the old and new shaft assembly locating pin of the present invention.
The figure indicates: 1-boring a die; 2-a convex spigot circle; 3-measuring clearance holes; 4-boring die thickness; 5-boring die diameter; 6-a convex spigot circle; 7-aligning the holes; 8-concave spigot circle; 9-concentric adjustment means; 10-old shaft; 11-a shaft connecting hole; 12-aligning the holes; 13-concave spigot circle; 14-new shaft; 15-connecting shaft holes; 16-locating pins; a is a matching surface; b-mating surface; c-mating surface; d-mating surface.
Detailed Description
The invention is further described below with reference to the drawings and the detailed description. A process method for machining a spindle connecting hole of a repair spindle of a hydropower station, in particular to a process method for machining a spindle connecting hole of a new spindle when one of two spindle connecting assembly spindles is repaired and replaced by the hydropower station. The technical proposal is as follows:
step one: cleaning and measuring: cleaning each plane and round surface of the old shaft 10, and measuring the diameter and size tolerance of the concave spigot circle 8 of the old shaft 10;
step two: boring and molding: machining and manufacturing 1 boring die 1 tool;
step three: old shaft assembly boring die: the boring machine platform on the old shaft 10 is placed vertically with the moving direction of the boring shaft according to the matching surface C; taking the male and female seam allowance of the old shaft 10 and the boring die 1 as positioning references, and performing assembling;
step four: boring die alignment hole processing: leveling the matching surface A of the boring lathe according to the boring die 1, and respectively and independently leveling the two coupling holes 11 in the 180-degree direction of the old shaft 10, and correspondingly reaming the two alignment holes 7 of the boring die 1 into alignment holes 12; machining a boring die positioning pin 16 according to the diameter size of the alignment hole 12, and assembling the positioning pin 16 after machining; then, the rest of the connecting shaft holes 11 are respectively and independently aligned, and the rest of the alignment holes 7 of the boring die 1 are correspondingly reamed and processed into alignment holes 12;
step five: the boring die is disassembled for the first time: the boring die 1 is detached from the old shaft 10, and the surfaces of the boring die 1 and the new shaft 14 are cleaned;
step six: new shaft assembly boring die: 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 for assembling;
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 die 1, and respectively and independently aligns two alignment holes 12 in the 180-degree direction of the boring die 1, correspondingly processes two coupling holes 15 on a new shaft 10, and assembles a positioning pin 16 after processing; then, the alignment holes 12 of the remaining boring dies 1 are respectively aligned singly, and the other connecting shaft holes 15 of the new shaft 10 are correspondingly processed;
step eight: and (3) removing the boring die for the second time: and (3) detaching the boring jig 1 from the new shaft 14, and cleaning each plane and the round surface of the boring jig 1 and the new shaft 14.
Specific examples:
taking the main shaft modification and maintenance of a hydropower station hydropower unit as an example, the process of processing by applying the method of the invention is described: the main shaft of the hydraulic turbine of the unit is detected to not meet the operation requirement, the main shaft of the hydraulic turbine of the unit is required to be replaced and remanufactured, and the main shaft of the generator coupled with the main shaft of the hydraulic turbine of the unit is not required to be replaced and can be used continuously. The main shaft of the water turbine has the weight of 10800kg, the length of 3616mm, the flange diameter phi of 1200mm and 14 coupling holes with the diameter phi of 92mm, and in order to ensure that the position of the coupling hole of the new shaft is consistent with that of the coupling hole of the old shaft as much as possible, the processing process of the invention is as follows:
1) Cleaning an old shaft: cleaning all planes and round surfaces of the old shaft 10 completely by using a cleaning agent, and measuring the diameter and size tolerance of the concave spigot round 8 of the old shaft 10 by using an inside micrometer;
2) Boring and molding:
the diameter dimension 5 of the boring die 1 is in a proportional relation with the diameter phi 1200mm of the main shaft flange and the thickness 4 of 15:1, namely the thickness D is 80mm; the male spigot circle 6 of the boring die 1 is matched and processed according to the measured diameter and size tolerance of the female spigot 8 of the old shaft 10, and the diameter clearance of the male spigot is set to be 0.02mm-0.08mm; 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 0.03mm; the number of the alignment holes 7 of the boring jig 1 is 14 as the same as the number of the coupling holes 11 of the old shaft 10;
when the boring die 1 and the old shaft 10 finish the combined machining of the alignment holes 12, the center coordinates of all the alignment holes 12 of the circumference are found out in a numerical control mode, and the center coordinates are used for machining the convex spigot circle 2 with the same size and diameter as those of the convex spigot circle 6;
3) Old shaft assembly boring die: the old shaft 10 is provided with a boring machine platform which is placed vertically with the moving direction of the boring machine boring shaft according to the matching surface C. Taking the male and female seam allowance of the old shaft 10 and the boring die 1 as a positioning reference, and carrying out assembling, wherein the assembling requirements are as follows: the connecting shaft hole 11 of the old shaft 10 is aligned with the center of the aligning hole 7 of the boring die 1; the concentric device 9 is adjusted by using 4 groups of boring dies uniformly distributed on the circumference, and the clearance between the male spigot circle 6 and the female spigot circle 8 is measured through the clearance measuring hole 3, so that the difference between the 4-point clearances is not more than 0.01mm, and the boring dies 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 die 1, no clearance is required, and the local maximum is not more than 0.02mm;
4) Boring die alignment hole processing: the leveling deviation of the boring machine according to the matching surface A of the boring die 1 is 0.01mm; the boring machine separately aligns two coupling holes 11 in the 180-degree direction of the old shaft 10, the required deviation is 0.01mm, and after the boring machine is qualified, the two alignment holes 7 of the boring die 1 are correspondingly reamed and processed into alignment holes 12;
matching and processing the positioning pin 16 of the boring die according to the diameter size of the alignment hole 12, wherein the gap between the matching and the processing is required to be 0.01mm-0.03mm, and assembling the positioning pin 16 of the old shaft 10 and the boring die 1 after processing; then, the rest of the connecting shaft holes 11 are respectively and independently aligned, and the rest of the alignment holes 7 of the boring die 1 are correspondingly reamed and processed into alignment holes 12;
5) The boring die is disassembled for the first time: the boring die 1 is detached from the old shaft 10, and the surfaces of the boring die 1 and the new shaft 14 are cleaned;
6) New shaft assembly boring die: the male spigot circle 2 of the boring die 1 is used as a positioning reference for the female spigot circle 13 of the new shaft 14, the assembly requirement is the same as that of the old shaft 10 and the boring die 1 in the step 3;
7) Processing a new shaft coupling hole: the boring machine uses a dial indicator to level deviation of 0.01mm according to the matching surface B of the boring die 1; the two alignment holes 12 are aligned independently in the 180-degree direction of the boring die 1, the required deviation is 0.01mm, the two coupling holes 15 on the new shaft 10 are correspondingly processed after the deviation is qualified, and the new shaft 14 and the positioning pin 16 of the boring die 1 are assembled after the processing; then, the alignment holes 12 of the remaining boring dies 1 are respectively aligned singly, and the other connecting shaft holes 15 of the new shaft 10 are correspondingly processed;
8) And (3) removing the boring die for the second time: the boring die 1 is detached from the new shaft 14, and the surfaces of each plane and circle of the boring die 1 and the new shaft 14 are cleaned;
9) Measuring the position of a spindle coupling hole of a spindle coupled with the old spindle 10 by using a laser tracker at a construction site and recording coordinate values; and then measuring the position of the coupling hole 15 of the new shaft 14 processed in the manufacturing plant by using a laser tracker, recording coordinate values, and comparing the two sets of coordinate values to be used as an effective detection and verification means for the position of the coupling hole 15 of the new shaft 14.
The invention and its embodiments have been described above by way of example only, and the invention is not limited to the embodiments shown in the drawings, but is in any way limited to practice. In summary, if one of ordinary skill in the art is informed by this disclosure, embodiments and examples similar to the technical solution are not creatively devised without departing from the gist of the present invention, and all the embodiments and examples are considered to be within the protection scope of the present invention.
Claims (6)
1. A process method for processing a spindle connecting hole of a repair spindle of a hydropower station is characterized by comprising the following steps:
step one: cleaning and measuring: cleaning each plane and round surface of the old shaft (10), and measuring the diameter and size tolerance of a concave spigot circle (8) of the old shaft (10);
step two: boring and molding: machining and manufacturing 1 boring die (1) tool;
step three: old shaft assembly boring die: the boring machine platform on the old shaft (10) is placed vertically with the moving direction of the boring shaft according to the matching surface (C); taking the male spigot and the female spigot of the old shaft (10) and the boring die (1) as positioning references for assembling;
step four: boring die alignment hole processing: leveling the matching surface (A) of the boring die (1) by the boring machine, and respectively and independently leveling the two coupling holes (11) in the 180-degree direction of the old shaft (10), and correspondingly reaming the two alignment holes (7) of the boring die (1) into alignment holes (12); machining a boring die positioning pin (16) according to the diameter size of the alignment hole (12), and assembling the positioning pin (16) after machining; then, the rest of the alignment holes (7) of the boring die (1) are correspondingly reamed and processed into alignment holes (12) according to the rest of the coupling holes (11) respectively and independently;
step five: the boring die is disassembled for the first time: the boring die (1) is detached from the old shaft (10), and the surfaces of the planes and the round surfaces of the boring die (1) and the new shaft (14) are cleaned;
step six: new shaft assembly boring die: 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) for assembling;
step seven: processing a new shaft coupling hole: leveling a matching surface (B) of a boring die (1) by using a dial indicator, respectively and independently aligning two alignment holes (12) in the 180-degree direction of the boring die (1), correspondingly processing two coupling holes (15) on a new shaft (10), and assembling a positioning pin (16) after processing; then, the alignment holes (12) of the remaining boring dies (1) are respectively aligned independently, and the other connecting shaft holes (15) of the new shaft (10) are correspondingly processed;
step eight: and (3) removing the boring die for the second time: and (3) detaching the boring jig (1) from the new shaft (14), and cleaning all planes and round surfaces of the boring jig (1) and the new shaft (14).
2. The process for machining the spindle connecting hole of the repair spindle of the hydropower station according to claim 1, wherein the process comprises the following steps: in the second step, the ratio of the diameter size (5) to the thickness (4) of the boring die (1) is set to 15:1; the male spigot circle (6) of the boring die (1) is matched and processed according to the diameter and size tolerance of the female 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 0.03mm; the number of the alignment holes (7) of the boring die (1) is consistent with the number of the coupling holes (11) of the old shaft (10).
3. The process for machining the spindle connecting hole of the repair spindle of the hydropower station according to claim 1, wherein the process comprises the following steps: in the second step, the male tang circle (2) of the boring die (1) is not machined when being single, after the boring die (1) and the old shaft (10) finish machining the alignment holes (12), the center coordinates of the center of the hole are found out by taking all the alignment holes (12) of the circumference as reference numerical control, and the male tang circle (2) with the same size and diameter as the male tang circle (6) is machined by the center coordinates.
4. The process for machining the spindle connecting hole of the repair spindle of the hydropower station according to claim 1, wherein the process comprises the following steps: in the third step, the connecting shaft hole (11) of the old shaft (10) is aligned with the center of the alignment hole (7) of the boring die (1); the concentric device (9) is adjusted by a boring die, and the gap difference between 4 points uniformly distributed on the circumference is not more than 0.01mm through the gap measuring holes (3), so that the boring die (1) and the old shaft (10) are coaxial; the matching surface C of the old shaft (10) is tightly attached to the matching surface B of the boring die (1), no clearance is required, and the local maximum is not more than 0.02mm; the new shaft (14) and the boring die (1) are assembled in the same manner as the old shaft (10) and the boring die (1).
5. The process for machining the spindle connecting hole of the repair spindle of the hydropower station according to claim 1, wherein the process comprises the following steps: in the fourth step, the boring machine is aligned according to the connecting shaft hole (11) of the old shaft (10) independently, and the deviation is not more than 0.01mm.
6. The process for machining the spindle connecting hole of the repair spindle of the hydropower station according to claim 1, wherein the process comprises the following steps: in the seventh step, the boring machine is aligned according to the new shaft (14) and the shaft connecting hole (15) independently, and the deviation is not more than 0.01mm.
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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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| Application Number | Priority Date | Filing Date | Title |
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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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| CN113953763B true CN113953763B (en) | 2023-11-14 |
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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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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
-
2021
- 2021-10-22 CN CN202111231088.4A patent/CN113953763B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
|---|
| 水轮机主轴与转轮镗模的设计;安华;;机械工程师(第02期);139-140 * |
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