CN114043412A - Thrust disc installation process of shaft seal main pump two-way thrust bearing of nuclear power station - Google Patents
Thrust disc installation process of shaft seal main pump two-way thrust bearing of nuclear power station Download PDFInfo
- Publication number
- CN114043412A CN114043412A CN202111399910.8A CN202111399910A CN114043412A CN 114043412 A CN114043412 A CN 114043412A CN 202111399910 A CN202111399910 A CN 202111399910A CN 114043412 A CN114043412 A CN 114043412A
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- CN
- China
- Prior art keywords
- thrust disc
- centering device
- thrust
- main pump
- electric lifting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000011900 installation process Methods 0.000 title claims description 8
- 238000000034 method Methods 0.000 claims abstract description 15
- 238000009434 installation Methods 0.000 claims description 9
- 230000002457 bidirectional effect Effects 0.000 abstract description 6
- 239000000306 component Substances 0.000 description 7
- 208000034656 Contusions Diseases 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
Abstract
The invention relates to a thrust disc mounting process of a main pump bidirectional thrust bearing of a nuclear power station shaft seal, wherein a guide rail (1) and an electric lifting platform (2) are used for moving a thrust disc (6) part of the main pump bidirectional thrust bearing of the shaft seal below a main pump mounting platform (7), a transverse centering device (3) and a longitudinal centering device (4) can move the thrust disc (6) in the transverse direction and the longitudinal direction, the thrust disc (6) and the shaft center of a bearing chamber (8) are centered, a key groove centering device (5) can rotate the thrust disc (6) in the circumferential direction, a key groove of the thrust disc (6) and the center of a pump shaft key (9) are centered, and the electric lifting platform (2) is used for lifting and descending the thrust disc (6). The mounting tool ensures the accurate positioning and mounting of the thrust disc (6) of the two-way thrust bearing of the main pump of the shaft seal, has simple operation, saves manpower and prevents collision.
Description
The technical field is as follows:
the invention relates to a thrust disc installation process of a shaft seal main pump two-way thrust bearing of a nuclear power station.
Background art:
the shaft seal main pump bidirectional thrust bearing is a key part sleeve of a reactor coolant pump (a shaft seal main pump for short) of a pressurized water reactor nuclear power station, the thrust disc is a core component of the bidirectional thrust bearing, the upper plane and the lower plane of the thrust disc are directly contacted with the bearing bush, and the thrust disc needs to be overhauled once every two years on average. In order to guarantee the maintenance period of the nuclear power station, the installation and the disassembly of the thrust disc need to be completed quickly and accurately. At present there are multiple installation and dismantlement mode at home and abroad, but when actual operation, degree of mechanization is low, and work load is big, consumes time long, often appears because assembly gap is little and the thrust disc that leads to, the bruising of two-way footstep bearing room, pump shaft key are hanged down to assembly part axis centering precision, wherein: the center line of the shaft is on the same plumb line, so that a set of tools and a mounting process are specially designed for mounting and dismounting the thrust disc.
The invention content is as follows:
the invention aims to provide a thrust disc installation process of a main shaft seal two-way thrust bearing of a nuclear power station, which is simple to operate, saves manpower and prevents collision.
The technical scheme of the invention is as follows:
a thrust disc installation process of a main shaft seal two-way thrust bearing of a nuclear power station comprises a guide rail (1), an electric lifting platform (2), a transverse centering device (3), a longitudinal centering device (4), a key groove centering device (5) and a main pump installation platform (7), wherein the special tool is of a vertical structure, the guide rail (1) and the electric lifting platform (2) are used for moving a thrust disc (6) part of the main shaft seal two-way thrust bearing to the lower part of the main pump installation platform (7), the transverse centering device (3) and the longitudinal centering device (4) adopt a ball screw design structure, the transverse centering device (3) can transversely move the thrust disc (6), the longitudinal centering device (4) can longitudinally move the thrust disc (6), and the thrust disc (6) and the shaft center of a bearing chamber (8) are centered (the shaft center lines are on the same vertical line, hereinafter, referred to as centering), the key groove centering device (5) can rotate the thrust disc (6) in the plane circumferential direction, and the key groove of the thrust disc (6) and the center of the pump shaft key (9) are centered, as shown in fig. 1, the method comprises the following steps:
1) mounting the guide rail (1) to the position right below a main pump mounting platform (7);
2) the method comprises the following steps that an electric lifting platform (2) is installed on a guide rail (1), a transverse centering device (3) is installed on the electric lifting platform (2), a longitudinal centering device (4) is installed on the transverse centering device (3), a key groove centering device (5) is installed on the longitudinal centering device (4), and the components are stably connected through fixing bolts, so that falling safety accidents of the components in the moving process are prevented;
3) the thrust disc (6) is stably placed on a platform of the key groove centering device (5) by a crane, and the two parts are stably connected by fixing bolts, so that falling safety accidents of the parts in the moving process are prevented;
4) the electric lifting platform (2) is moved to the position below the main pump mounting platform (7);
5) starting a lifting switch of the electric lifting platform (2), integrally lifting the transverse centering device (3), the longitudinal centering device (4), the key groove centering device (5) and the thrust disc (6) upwards, and stopping the electric lifting platform (2) when the thrust disc (6) is 10mm away from the bearing chamber (8);
6) a transverse centering device (3), a longitudinal centering device (4) and a key groove centering device (5) are used for respectively carrying out transverse and longitudinal centering operations on the thrust disc (6), so that the coaxiality of the thrust disc (6) and the bearing chamber (8) is ensured to be less than or equal to 0.05 mm;
7) starting a lifting switch of the electric lifting platform (2), lifting the thrust disc (6), stopping the electric lifting platform (2) when the distance between the thrust disc (6) and the pump shaft (10) is 5mm, manually rotating the key groove centering device (5), and centering the key groove of the thrust disc (6) and the pump shaft key (9);
(8) and starting a low-speed lifting switch of the electric lifting platform (2), slowly pushing the thrust disc (6) into the pump shaft (10), and finishing the installation of the thrust disc (6).
The invention has the technical effects that:
1) utilize guide rail (1), electric lift platform (2), can steadily remove thrust disc (6) to the below of main pump mounting platform (7), easy operation has saved the manpower to the emergence of colliding with has been prevented.
2) The transverse centering device (3) and the longitudinal centering device (4) adopt ball screw structures to enable the thrust disc (6) to move in two directions, namely the transverse direction and the longitudinal direction, the combined use of the transverse centering device and the longitudinal centering device ensures the accurate centering of the shaft centers of the thrust disc (6) and the bearing chamber (8), the coaxiality of the installation of the two components is ensured, and the clamping stagnation and the scratch of the components caused by inaccurate centering in the installation process are avoided.
3) The key groove centering device (5) can enable the thrust disc (6) to rotate in the circumferential direction, and the key groove centering device is used for centering the key groove of the thrust disc (6) and the center of the pump shaft key (9). The problems of component clamping stagnation and key damage caused by inaccurate alignment of the key groove and the pump shaft key (9) in the installation process are avoided.
Description of the drawings:
FIG. 1 is a schematic view showing the installation of a thrust disc of a shaft seal main pump two-way thrust bearing
The specific implementation mode is as follows:
as shown in figure 1, a thrust disc mounting process of a main pump bidirectional thrust bearing of a nuclear power station shaft seal comprises a guide rail 1, an electric lifting platform 2, a transverse centering device 3, a longitudinal centering device 4, a key groove centering device 5 and a main pump mounting platform 7, wherein the special tool is of a vertical structure, the guide rail 1 and the electric lifting platform 2 are used for moving a thrust disc 6 part of the main pump bidirectional thrust bearing of the shaft seal below the main pump mounting platform 7, the transverse centering device 3 and the longitudinal centering device 4 adopt a ball screw design structure, the transverse centering device 3 can transversely move the thrust disc 6, the longitudinal centering device 4 can longitudinally move the thrust disc 6 and has the function of centering the thrust disc 6 and the shaft center of a bearing chamber 8, the shaft center lines are on the same vertical line, the key groove centering device 5 can rotate the thrust disc 6 in the plane circumferential direction, the method has the function of centering the key groove of the thrust disc 6 with the center of the pump shaft key 9, and comprises the following steps:
1) mounting the guide rail 1 to the position right below the main pump mounting platform 7;
2) the method comprises the following steps of installing an electric lifting platform 2 on a guide rail 1, installing a transverse centering device 3 on the electric lifting platform 2, installing a longitudinal centering device 4 on the transverse centering device 3, installing a key groove centering device 5 on the longitudinal centering device 4, and stably connecting the components by using a fixing bolt, so that falling safety accidents of the components in the moving process are prevented;
3) the thrust disc 6 is stably placed on the platform of the key groove centering device 5 by a crane and the two parts are stably connected by fixing bolts, so that falling safety accidents of the parts in the moving process are prevented;
4) the electric lifting platform 2 is moved to the lower part of the main pump mounting platform 7;
5) starting a lifting switch of the electric lifting platform 2, integrally lifting the transverse centering device 3, the longitudinal centering device 4, the key groove centering device 5 and the thrust disc 6 upwards, and stopping the electric lifting platform 2 when the thrust disc 6 is 810mm away from the bearing chamber;
6) the transverse centering device 3, the longitudinal centering device 4 and the key groove centering device 5 are used for respectively carrying out transverse and longitudinal centering operations on the thrust disc 6, so that the coaxiality of the thrust disc 6 and the bearing chamber 8 is ensured to be less than or equal to 0.05 mm;
7) starting a lifting switch of the electric lifting platform 2, lifting the thrust disc 6, stopping the electric lifting platform 2 when the distance between the thrust disc 6 and the pump shaft 10 is 5mm, manually rotating the key groove centering device 5, and centering the key groove of the thrust disc 6 and the pump shaft key 9;
8) and starting a low-speed lifting switch of the electric lifting platform 2, slowly pushing the thrust disc 6 into the pump shaft 10, and finishing the installation of the thrust disc 6.
Claims (1)
1. A thrust disc installation process of a two-way thrust bearing of a main pump of a shaft seal of a nuclear power station is characterized by comprising the following steps: the special tool is of a vertical structure, wherein the guide rail (1) and the electric lifting platform (2) are used for moving a thrust disc (6) part of a shaft seal main pump two-way thrust bearing below the main pump mounting platform (7), the transverse centering device (3) and the longitudinal centering device (4) adopt a ball screw design structure, the transverse centering device (3) can transversely move the thrust disc (6), the longitudinal centering device (4) can longitudinally move the thrust disc (6) and has the function of centering the thrust disc (6) and the shaft center of a bearing chamber (8), namely the shaft center lines are on the same vertical line, and the keyway centering device (5) can rotate the thrust disc (6) in the plane circumferential direction, the method has the function of centering the key groove of the thrust disc (6) and the center of the pump shaft key (9), and comprises the following steps:
1) mounting the guide rail (1) to the position right below a main pump mounting platform (7);
2) the method comprises the following steps that an electric lifting platform (2) is installed on a guide rail (1), a transverse centering device (3) is installed on the electric lifting platform (2), a longitudinal centering device (4) is installed on the transverse centering device (3), a key groove centering device (5) is installed on the longitudinal centering device (4), and the components are stably connected through fixing bolts, so that falling safety accidents of the components in the moving process are prevented;
3) the thrust disc (6) is stably placed on a platform of the key groove centering device (5) by a crane, and the two parts are stably connected by fixing bolts, so that falling safety accidents of the parts in the moving process are prevented;
4) the electric lifting platform (2) is moved to the position below the main pump mounting platform (7);
5) starting a lifting switch of the electric lifting platform (2), integrally lifting the transverse centering device (3), the longitudinal centering device (4), the key groove centering device (5) and the thrust disc (6) upwards, and stopping the electric lifting platform (2) when the thrust disc (6) is 10mm away from the bearing chamber (8);
6) a transverse centering device (3), a longitudinal centering device (4) and a key groove centering device (5) are used for respectively carrying out transverse and longitudinal centering operations on the thrust disc (6), so that the coaxiality of the thrust disc (6) and the bearing chamber (8) is ensured to be less than or equal to 0.05 mm;
7) starting a lifting switch of the electric lifting platform (2), lifting the thrust disc (6), stopping the electric lifting platform (2) when the distance between the thrust disc (6) and the pump shaft (10) is 5mm, manually rotating the key groove centering device (5), and centering the key groove of the thrust disc (6) and the pump shaft key (9);
(8) and starting a low-speed lifting switch of the electric lifting platform (2), slowly pushing the thrust disc (6) into the pump shaft (10), and finishing the installation of the thrust disc (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111399910.8A CN114043412A (en) | 2021-11-24 | 2021-11-24 | Thrust disc installation process of shaft seal main pump two-way thrust bearing of nuclear power station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111399910.8A CN114043412A (en) | 2021-11-24 | 2021-11-24 | Thrust disc installation process of shaft seal main pump two-way thrust bearing of nuclear power station |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114043412A true CN114043412A (en) | 2022-02-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111399910.8A Pending CN114043412A (en) | 2021-11-24 | 2021-11-24 | Thrust disc installation process of shaft seal main pump two-way thrust bearing of nuclear power station |
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| CN (1) | CN114043412A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111975290A (en) * | 2020-07-23 | 2020-11-24 | 哈尔滨电气动力装备有限公司 | Nuclear power main pump impeller mounting process |
| CN113020936A (en) * | 2021-03-17 | 2021-06-25 | 哈电发电设备国家工程研究中心有限公司 | Thrust disc and shaft sleeve mounting device and method applied to vertical rotary machine |
| CN113153800A (en) * | 2021-05-14 | 2021-07-23 | 平湖市犇流泵业制造有限公司 | Stable in structure and easy to assemble's no leakage pump shafting subassembly |
-
2021
- 2021-11-24 CN CN202111399910.8A patent/CN114043412A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111975290A (en) * | 2020-07-23 | 2020-11-24 | 哈尔滨电气动力装备有限公司 | Nuclear power main pump impeller mounting process |
| CN113020936A (en) * | 2021-03-17 | 2021-06-25 | 哈电发电设备国家工程研究中心有限公司 | Thrust disc and shaft sleeve mounting device and method applied to vertical rotary machine |
| CN113153800A (en) * | 2021-05-14 | 2021-07-23 | 平湖市犇流泵业制造有限公司 | Stable in structure and easy to assemble's no leakage pump shafting subassembly |
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Application publication date: 20220215 |
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