CN111975290A - Nuclear power main pump impeller mounting process - Google Patents
Nuclear power main pump impeller mounting process Download PDFInfo
- Publication number
- CN111975290A CN111975290A CN202010714006.0A CN202010714006A CN111975290A CN 111975290 A CN111975290 A CN 111975290A CN 202010714006 A CN202010714006 A CN 202010714006A CN 111975290 A CN111975290 A CN 111975290A
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- China
- Prior art keywords
- impeller
- bolt
- main pump
- nut
- nuclear power
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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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
- B23Q3/02—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for mounting on a work-table, tool-slide, or analogous part
- B23Q3/06—Work-clamping means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/60—Mounting; Assembling; Disassembling
- F04D29/605—Mounting; Assembling; Disassembling specially adapted for liquid pumps
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention relates to a nuclear power main pump impeller mounting process, which adopts a liftable mounting platform to enable an impeller to integrally move from bottom to top, adopts a positioning device with an adjustable center to adjust the center of the impeller in the impeller lifting process, ensures that the coaxiality between an impeller bolt and the impeller is less than 0.03mm, stretches the impeller bolt according to a given pretightening force after the impeller is positioned, and stops a bolt stretcher once the pretightening force reaches a pretightening force value. The invention ensures that the impeller can be accurately positioned in the process of carrying out the nuclear power main pump, ensures the coaxiality among the lower pump shaft, the impeller and the impeller cover, meets the operation requirement of the main pump and the dynamic balance requirement of a rotating part, and avoids the scratch of the impeller and the impeller cover in the operation of the nuclear power main pump.
Description
The technical field is as follows:
the invention relates to a process for installing an impeller of a nuclear power main pump.
Background art:
the impeller is a nuclear primary part of a nuclear power main pump, is designed into an axial flow type, is made of 1.4313 materials, has 5 blades, and has an outer diameter of 860mm and a weight of 370 Kg. The impeller is machined by adopting an integral forging piece, and no welding seam exists. The surface roughness of the two surfaces of the blade is manually polished to Ra0.8, and the other overflowing surfaces are polished to Ra1.6. 8 radial cylindrical pins are adopted between the lower pump shaft and the impeller for centering and transmitting torque; a special rotating part and a motor shaft drive an impeller to rotate and do work through an upper half coupling, a lower half coupling and a lower pump shaft, and the rotating speed is 1486 revolutions per minute when a main pump is in a normal operation state. The impeller lift reaches 97.2m, and due to the special structure of the main pump, the impeller must be installed from bottom to top, so that the assembly difficulty is extremely high. The following two possibilities of injury occur if the impeller is not mounted correctly.
Firstly, the method comprises the following steps: if the impeller generates radial movement deviation in the operation process of the main pump, the impeller cover can be scratched, and tools are damaged.
Secondly, the method comprises the following steps: if the impeller is not correctly positioned at the lower pump shaft, the impeller is a high-speed rotating part, and the dynamic balance cannot meet the requirement in the operation process of the main pump, so that the main pump vibrates.
At present, a nuclear power main pump is not manufactured in China, no experience can be used for reference, and a set of reasonable impeller installation process is invented by continuous exploration and research. Because the impeller is positioned at the lowest end of the main pump and in the impeller cover, the clearance between the impeller and the lower pump shaft is only 0.06mm, and the clearance between the impeller and the impeller cover is only 0.6mm, a reasonable assembly process must be established.
The invention content is as follows:
the invention aims to provide a nuclear power main pump impeller installation process, which ensures the coaxiality among a lower pump shaft, an impeller and an impeller cover, meets the operation requirement of a main pump and the dynamic balance requirement of a rotating part, and avoids the scratch of the impeller and the impeller cover in the operation of the nuclear power main pump. The technical scheme of the invention is as follows: the utility model provides a nuclear power main pump impeller mounting process, adopt liftable mounting platform to make the whole impeller of bottom-to-top removal, impeller lifting process adopts the positioner of adjustable center to transfer the center to the impeller, guarantee that the axiality between impeller bolt and the impeller is less than 0.03mm, after the impeller location, according to the tensile impeller bolt of given pretightning force, in case reach the pretightning force numerical value, stop bolt elongator does work, screw up impeller nut immediately until being close to the impeller to reach the accurate location and the installation of impeller, above-mentioned method includes following step:
1) installing a service seal (3) into the guide vane (1); the cylindrical pin (4) is arranged on the lower pump shaft (2);
2) an impeller bolt (6) is arranged on the lower pump shaft (2), and the lower pump shaft (2) falls on the maintenance seal (3);
3) placing a distance ring (10) on a positioning device (11), installing a support plate (8) on the distance ring (10), and placing an impeller (5) on the support plate (8);
4) lifting the lifting platform (12), stopping lifting the lifting platform (12) after the impeller bolt (6) enters the impeller (5), adjusting the center of the impeller (5) by adopting a positioning device (11), enabling the coaxiality of the impeller (5) and the impeller bolt (6) to be less than 0.03mm, and lifting the lifting platform (12) again until the impeller (5) is accurately positioned by the upper cylindrical pin (4);
5) screwing the screw (7) into the guide vane (1) through the support plate (8), and screwing the hexagonal nut (9) until the hexagonal nut (9) is close to the support plate (8);
6) a falling lifting platform (12), a positioning device (11) and a distance ring (10);
7) screwing an impeller nut (13) into the impeller bolt (6);
8) installing a bolt stretcher (14) and stretching the impeller bolt (6) according to a given pretightening force;
9) once the final pretightening force value is reached, the impeller nut (13) is immediately fastened by a deflector rod (15) until the impeller nut is tightly attached to the impeller (5);
10) and (3) slowly relieving the pressure of the bolt stretcher (14), and removing the tool screw (7), the support plate (8) and the nut (9) to complete the whole installation process.
And in the step 3), the accurate adjustment of the coaxiality of the impeller (5) and the impeller bolt (6) in the step 4) can be ensured only if the fit clearance between the impeller (5) and the supporting plate (8) is smaller than 0.03mm and the fit clearance between the distance ring (10) and the supporting plate (8) is smaller than 0.03 mm.
The invention has the technical effects that:
according to the invention, the liftable installation platform impeller is adopted to integrally move from bottom to top, the impeller is aligned by the aligning positioning device in the impeller lifting process, and the impeller is ensured to be accurately positioned in the impeller lifting process.
The invention ensures the coaxiality of the impeller and the lower pump shaft in the installation process through the positioning device with the adjustable center so as to achieve the accurate positioning and installation of the impeller, meet the dynamic balance requirement of the nuclear main pump in the operation process, avoid the scratch of the impeller and the impeller cover, and solve the problems of vibration and the like generated in the operation of the main pump.
The positioning device has the aligning function, can also be used in the field of assembly of other parts, meets the technical requirement of 6 center adjustment in the assembly process, and can also be applied in the field of installation processes from bottom to top.
Description of the drawings:
FIG. 1 is a schematic view of the overall structure of the impeller installation of a nuclear power main pump
FIG. 2 is a partial schematic view of the installation of a nuclear power main pump impeller
The specific implementation mode is as follows:
as shown in fig. 1, a nuclear power main pump impeller installation process adopts a liftable installation platform to enable an impeller to integrally move from bottom to top, adopts a positioning device with an adjustable center to adjust the center of the impeller in the impeller lifting process, ensures that the coaxiality between an impeller bolt and the impeller is less than 0.03mm, stretches the impeller bolt according to a given pretightening force after the impeller is positioned, stops a bolt stretcher to do work once the pretightening force value is reached, and immediately screws an impeller nut until the impeller nut is close to the impeller so as to achieve accurate positioning and installation of the impeller, and the method comprises the following steps:
1) installing service seals 3 into the guide vanes 1; the cylindrical pin 4 is arranged on the lower pump shaft 2;
2) installing an impeller bolt 6 on the lower pump shaft 2, and dropping the lower pump shaft 2 onto the maintenance seal (3);
3) placing the distance ring 10 on the positioning device 11, installing the support plate 8 on the distance ring 10, and placing the impeller 5 on the support plate 8;
4) lifting the lifting platform 12, stopping lifting the lifting platform 12 after the impeller bolt 6 enters the impeller 5, adjusting the center of the impeller 5 by using the positioning device 11 to ensure that the coaxiality of the impeller 5 and the impeller bolt 6 is less than 0.03mm, and lifting the lifting platform 12 again until the impeller 5 is accurately positioned by the upper cylindrical pin 4;
5) screwing the screw 7 into the guide vane 1 through the support plate 8, and screwing the hexagon nut 9 until the hexagon nut 9 is close to the support plate 8;
6) a falling lifting platform 12, a positioning device 11 and a distance ring 10;
as shown in fig. 2
7) Screwing the impeller nut 13 into the impeller bolt 6;
8) installing a bolt stretcher 14 and stretching the impeller bolt 6 according to a given pretightening force;
9) once the final pretightening force value is reached, the impeller nut 13 is immediately fastened by the deflector rod 15 until the impeller nut is tightly attached to the impeller 5;
10) and slowly releasing the pressure of the bolt stretcher 14, and removing the tool screw 7, the support plate 8 and the nut 9 to finish the whole installation process.
In the step 3), the accuracy of adjusting the coaxiality of the impeller 5 and the impeller bolt 6 in the step 4) can be ensured only if the fit clearance between the impeller 5 and the supporting plate 8 is smaller than 0.03mm and the fit clearance between the distance ring 10 and the supporting plate 8 is smaller than 0.03 mm.
The positioning device 11 in step 4) must have a centering function.
Claims (2)
1. A nuclear power main pump impeller installation process is characterized in that: the installation platform that adopts the liftable makes the impeller wholly remove from bottom to top, and the impeller promotes the in-process and adopts the positioner of adjustable center to transfer the center to the impeller, guarantees that the axiality between impeller bolt and the impeller is less than 0.03mm, after the impeller location, according to the tensile impeller bolt of given pretightning force, in case reach the pretightning force numerical value, stops bolt elongator doing work, screws up the impeller nut immediately until being close to the impeller to reach the accurate location and the installation of impeller, above-mentioned method includes following step:
1) installing a service seal (3) into the guide vane (1); the cylindrical pin (4) is arranged on the lower pump shaft (2);
2) an impeller bolt (6) is arranged on the lower pump shaft (2), and the lower pump shaft (2) falls on the maintenance seal (3);
3) placing a distance ring (10) on a positioning device (11), installing a support plate (8) on the distance ring (10), and placing an impeller (5) on the support plate (8);
4) lifting the lifting platform (12), stopping lifting the lifting platform (12) after the impeller bolt (6) enters the impeller (5), adjusting the center of the impeller (5) by adopting a positioning device (11), enabling the coaxiality of the impeller (5) and the impeller bolt (6) to be less than 0.03mm, and lifting the lifting platform (12) again until the impeller (5) is accurately positioned by the upper cylindrical pin (4);
5) screwing the screw (7) into the guide vane (1) through the support plate (8), and screwing the hexagonal nut (9) until the hexagonal nut (9) is close to the support plate (8);
6) a falling lifting platform (12), a positioning device (11) and a distance ring (10);
7) screwing an impeller nut (13) into the impeller bolt (6);
8) installing a bolt stretcher (14) and stretching the impeller bolt (6) according to a given pretightening force;
9) once the final pretightening force value is reached, the impeller nut (13) is immediately fastened by a deflector rod (15) until the impeller nut is tightly attached to the impeller (5);
10) and (3) slowly relieving the pressure of the bolt stretcher (14), and removing the tool screw (7), the support plate (8) and the nut (9) to complete the whole installation process.
2. The process for installing the impeller of the nuclear power main pump as claimed in claim 1, wherein the process comprises the following steps: and in the step 3), the accurate adjustment of the coaxiality of the impeller (5) and the impeller bolt (6) in the step 4) can be ensured only if the fit clearance between the impeller (5) and the supporting plate (8) is smaller than 0.03mm and the fit clearance between the distance ring (10) and the supporting plate (8) is smaller than 0.03 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010714006.0A CN111975290B (en) | 2020-07-23 | 2020-07-23 | Nuclear power main pump impeller mounting process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010714006.0A CN111975290B (en) | 2020-07-23 | 2020-07-23 | Nuclear power main pump impeller mounting process |
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| CN111975290A true CN111975290A (en) | 2020-11-24 |
| CN111975290B CN111975290B (en) | 2022-02-25 |
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| CN202010714006.0A Active CN111975290B (en) | 2020-07-23 | 2020-07-23 | Nuclear power main pump impeller mounting process |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113414553A (en) * | 2021-06-30 | 2021-09-21 | 哈尔滨电气动力装备有限公司 | Machining process of main pump impeller cover of shaft seal of nuclear power station |
| CN113580068A (en) * | 2021-07-21 | 2021-11-02 | 福建福清核电有限公司 | Nuclear power plant liquid ring vacuum pump impeller mounting device and method |
| CN114043412A (en) * | 2021-11-24 | 2022-02-15 | 哈尔滨电气动力装备有限公司 | Thrust disc installation process of shaft seal main pump two-way thrust bearing of nuclear power station |
| CN117399985A (en) * | 2023-12-15 | 2024-01-16 | 杭州新亚低温科技有限公司 | High-accuracy and high-efficiency assembling and debugging system for high-power high-lift cryogenic pump |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5600886A (en) * | 1993-02-23 | 1997-02-11 | Hitachi, Ltd. | Method of making vortex flow blower and vane wheel therefor |
| FR2738303A1 (en) * | 1995-08-30 | 1997-03-07 | Europ Propulsion | TURBINE OF THERMOSTRUCTURAL COMPOSITE MATERIAL, ESPECIALLY A SMALL DIAMETER, AND PROCESS FOR PRODUCING THE SAME |
| CN101408202A (en) * | 2008-11-18 | 2009-04-15 | 河南省西峡汽车水泵股份有限公司 | Method and device for press mounting water pump impeller |
| CN106555768A (en) * | 2016-11-07 | 2017-04-05 | 长沙山水节能研究院有限公司 | Online adjustable centrifugal pump and its on-line control method |
| CN106949087A (en) * | 2017-05-03 | 2017-07-14 | 哈尔滨电气动力装备有限公司 | Band back blade axle envelope formula core main pump impeller structure |
| CN207248048U (en) * | 2017-08-29 | 2018-04-17 | 东方阿海珐核泵有限责任公司 | A kind of nuclear power main pump impeller measuring device |
-
2020
- 2020-07-23 CN CN202010714006.0A patent/CN111975290B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5600886A (en) * | 1993-02-23 | 1997-02-11 | Hitachi, Ltd. | Method of making vortex flow blower and vane wheel therefor |
| FR2738303A1 (en) * | 1995-08-30 | 1997-03-07 | Europ Propulsion | TURBINE OF THERMOSTRUCTURAL COMPOSITE MATERIAL, ESPECIALLY A SMALL DIAMETER, AND PROCESS FOR PRODUCING THE SAME |
| CN101408202A (en) * | 2008-11-18 | 2009-04-15 | 河南省西峡汽车水泵股份有限公司 | Method and device for press mounting water pump impeller |
| CN106555768A (en) * | 2016-11-07 | 2017-04-05 | 长沙山水节能研究院有限公司 | Online adjustable centrifugal pump and its on-line control method |
| CN106949087A (en) * | 2017-05-03 | 2017-07-14 | 哈尔滨电气动力装备有限公司 | Band back blade axle envelope formula core main pump impeller structure |
| CN207248048U (en) * | 2017-08-29 | 2018-04-17 | 东方阿海珐核泵有限责任公司 | A kind of nuclear power main pump impeller measuring device |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113414553A (en) * | 2021-06-30 | 2021-09-21 | 哈尔滨电气动力装备有限公司 | Machining process of main pump impeller cover of shaft seal of nuclear power station |
| CN113580068A (en) * | 2021-07-21 | 2021-11-02 | 福建福清核电有限公司 | Nuclear power plant liquid ring vacuum pump impeller mounting device and method |
| CN114043412A (en) * | 2021-11-24 | 2022-02-15 | 哈尔滨电气动力装备有限公司 | Thrust disc installation process of shaft seal main pump two-way thrust bearing of nuclear power station |
| CN117399985A (en) * | 2023-12-15 | 2024-01-16 | 杭州新亚低温科技有限公司 | High-accuracy and high-efficiency assembling and debugging system for high-power high-lift cryogenic pump |
| CN117399985B (en) * | 2023-12-15 | 2024-03-05 | 杭州新亚低温科技有限公司 | High-accuracy and high-efficiency assembling and debugging system for high-power high-lift cryogenic pump |
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| Publication number | Publication date |
|---|---|
| CN111975290B (en) | 2022-02-25 |
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