CN215201724U - Main pump mechanical seal subassembly dismouting appurtenance - Google Patents
Main pump mechanical seal subassembly dismouting appurtenance Download PDFInfo
- Publication number
- CN215201724U CN215201724U CN202023277575.8U CN202023277575U CN215201724U CN 215201724 U CN215201724 U CN 215201724U CN 202023277575 U CN202023277575 U CN 202023277575U CN 215201724 U CN215201724 U CN 215201724U
- Authority
- CN
- China
- Prior art keywords
- mechanical seal
- main pump
- auxiliary
- seal assembly
- cylinder
- 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.)
- Withdrawn - After Issue
Links
- 238000003825 pressing Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 9
- 238000006073 displacement reaction Methods 0.000 abstract description 3
- 238000009434 installation Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000008602 contraction Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000003758 nuclear fuel Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Images
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model belongs to the nuclear power station overhauls the technique, concretely relates to main pump machine seals subassembly dismouting appurtenance and machine seals subassembly dismouting method. The elastic auxiliary device is uniformly distributed in the circumferential direction of the circular fixed disc; the elastic force auxiliary device comprises a cylinder body, a fixed bottom plate connected with the cylinder body, a spring, a spherical contact and an elastic force adjusting bolt; when the mechanical seal assembly is installed, the elastic force auxiliary device is adjusted, then the mechanical seal assembly is completely installed, and finally the fixed disc and the auxiliary support cylinder are removed; the disassembly process is reversed. Can stabilize the micro displacement of machine seal subassembly in dismantlement or installation, ensure the relative vertical position between machine seal subassembly and the pump shaft, avoid taking place the jam phenomenon in the motion process.
Description
Technical Field
The utility model belongs to the nuclear power station overhauls the technique, concretely relates to main pump machine seals subassembly dismouting appurtenance.
Background
The nuclear power station has 16 main pumps for establishing the forced circulation of a loop medium and conducting the heat export of the reactor. The pump is a single-stage vertical multi-machine seal centrifugal pump, and a machine seal assembly of the pump is mainly used for sealing a loop medium and bears huge working pressure in the system. According to the equipment maintenance outline requirement, 1 disassembly overhaul is required for 1 main pump every 4 reactor refueling cycles, wherein the disassembly overhaul comprises the disassembly check of the mechanical seal assembly. In the disassembly and installation processes of the mechanical seal assembly, because the total clearance value of the inner sleeve of the mechanical seal assembly and the pump shaft is small and is only tens of micrometers, the mechanical seal assembly cannot move vertically relative to the pump shaft due to the installation matching distance of the mechanical seal assembly which is about 1 meter, and small size deviation causes the mechanical seal assembly to be blocked, so that the mechanical seal assembly and the pump shaft are damaged and unusable, huge economic loss is caused, the overhaul progress of the unit is delayed, and the production benefit of the whole unit is reduced.
Disclosure of Invention
The utility model aims at providing a main pump machine seals subassembly dismouting appurtenance can seal the dismantlement of subassembly, the installation in the main pump machine and assist spacingly to the movement track, ensures the relative vertical motion relation between machine seal subassembly and the pump shaft, avoids the emergence of card axle phenomenon.
The technical scheme of the utility model as follows:
a main pump mechanical seal assembly dismounting auxiliary tool comprises a fixed disc and a plurality of elastic auxiliary devices, wherein the fixed disc is arranged on the mechanical seal assembly, the elastic auxiliary devices are arranged on the fixed disc, the fixed disc is in a circular ring shape, and the elastic auxiliary devices are uniformly distributed in the circumferential direction of the circular ring-shaped fixed disc;
the elastic force auxiliary device comprises a cylinder body arranged on the fixed disc, and the length direction of the cylinder body is along the radial direction of the fixed disc; the spring-type cylinder is characterized by also comprising a fixed bottom plate connected with the cylinder, a spring and a spherical contact arranged in the fixed bottom plate, and an elastic force adjusting bolt with one end inserted into the fixed bottom plate and the end contacted with the spring;
the spherical contact is arranged at an opening at one end of the fixed bottom plate, the spherical contact is positioned at the outer edge of the circular ring of the fixed plate, the elastic force adjusting bolt is inserted into the other end of the fixed bottom plate, and a spring is arranged between the elastic force adjusting bolt and the spherical contact.
The elastic auxiliary device is characterized by further comprising an auxiliary supporting cylinder arranged on the outer side of the elastic auxiliary device and coaxial with a pump shaft of the main pump.
The spherical contact is contacted with the auxiliary supporting barrel, and the moment of pressing the auxiliary supporting barrel by the spherical contact of each elastic auxiliary device in the circumferential direction is the same.
The auxiliary support cylinder is in a cylindrical shape with openings at the upper end and the lower end, a flange structure is arranged at the opening at the upper end and the lower end, and the auxiliary support cylinder is connected with a main pump flange at the flange position by a fastening bolt of a mechanical seal outer pump shell.
And a bolt hole is processed in one side of the flange at the lower end of the auxiliary supporting cylinder, and a cylinder body adjusting bolt is arranged in the bolt hole.
The cylinder body is provided with an elastic auxiliary device fastening bolt hole, and the cylinder body is connected with the fixed disc through the mounting bolt.
The fixed disk is connected with the mechanical seal assembly through a fixed disk fastening bolt hole.
The invention has the following remarkable effects: the tool has simple structure and convenient use; the main pump shaft and the auxiliary supporting cylinder are in a concentric position through the adjusting bolt of the auxiliary supporting cylinder body; through the elastic auxiliary device, the micro displacement of the mechanical seal assembly in the dismounting or mounting process is stabilized, the relative vertical position between the mechanical seal assembly and the pump shaft is ensured, and the jamming phenomenon in the movement process is avoided; the huge economic loss and the unit output loss caused by the jamming and damage of the mechanical seal assembly and the pump shaft can be avoided; the maintenance efficiency can be improved, and the irradiation time of personnel is reduced.
Drawings
FIG. 1 is a schematic view of the position of a main pump seal assembly;
FIG. 2 is a block diagram of a main pump seal assembly;
FIG. 3 is a top view of the main pump mechanical seal assembly;
FIG. 4 is a schematic diagram of an elastic force assisting device in an auxiliary tool for assembling and disassembling a main pump seal assembly;
FIG. 5 is a top view of the main pump seal assembly disassembly and assembly aid;
FIG. 6 is a view showing a structure of a main pump mechanical seal assembly dismounting auxiliary tool and a mechanical seal assembly;
FIG. 7 is a structural view of an auxiliary support cylinder in the auxiliary tool for assembling and disassembling the main pump seal assembly;
FIG. 8 is a view showing the structure of the combination of the auxiliary support cylinder and the main flange of the main pump;
FIG. 9 is an illustration of a process of use of the main pump seal assembly disassembly and assembly aid;
in the figure: 1. a machine seal assembly lock nut; 2. a machine seal assembly; 3. a machine seal outer pump housing; 4. a main pump main flange; 5, fastening bolts of the outer pump shell of the mechanical seal; 6. fastening bolt holes of the mechanical seal assembly; 7. hoisting holes are formed in the upper end of the mechanical seal assembly; 8. fixing the disc; 9. an elastic force assisting device; 10. fixing disc fastening bolt holes; 11. an auxiliary support cylinder; 12. a barrel adjusting bolt; 13. a main pump shaft; 14. fixing plate fastening bolts; 15. an elastic force adjusting bolt; 16. a spring; 17. a spherical contact; 18. the elastic auxiliary device fastens the bolt hole; 19. the elastic auxiliary device fastens the bolt; 20. a barrel; 21. and fixing the bottom plate.
Detailed Description
The present invention will be further explained with reference to the drawings and the detailed description.
As shown in fig. 1, the auxiliary tool for disassembly and assembly is a mechanical seal assembly 2, when the auxiliary tool is completely installed, the auxiliary tool is fixed on a main pump main flange 4 through a mechanical seal assembly locking nut 1 in a mechanical seal outer pump shell 3 of a main pump, the mechanical seal assembly 2 is sleeved outside a main pump shaft 13, and the mechanical seal outer pump shell 3 is connected with the main pump main flange 4 through a mechanical seal outer pump shell fastening bolt 5.
As shown in fig. 2, the lower end of the mechanical seal assembly 2 is provided with a flange structure, and screw holes are processed on the flange structure.
As shown in fig. 3, the upper surface of the mechanical seal assembly 2 is provided with a mechanical seal assembly fastening bolt hole 6 and a mechanical seal assembly upper end hoisting hole 7.
The auxiliary tool for disassembling and assembling the present application is installed on the upper surface of the machine seal assembly 2.
As shown in fig. 5 and fig. 6, the auxiliary tool for disassembly and assembly includes a fixing plate 8 mounted on the mechanical seal assembly 2, and an elastic force assisting device 9 mounted on the fixing plate 8. The fixing plate 8 is fixed with the mechanical seal assembly 2 through fixing plate fastening bolts 14.
The elastic force auxiliary devices 9 are uniformly distributed in the circumferential direction of the circular fixed disk 8. In this embodiment, the number of the elastic force assisting devices 9 is 4.
As shown in fig. 4, the elastic force assisting device 9 includes a cylinder 20 mounted on the fixed plate 8 by bolts, a fixed base plate 21 fixedly mounted on the cylinder 20, a spring 16 and a ball contact 17 mounted inside the fixed base plate 21, and an elastic force adjusting bolt 15 inserted into the fixed base plate 21 and having an end portion contacting the spring 16.
The ball contact 17 is installed at an opening of one end of the fixed base plate 21, the elastic force adjusting bolt 15 is inserted into the other end of the fixed base plate 21, and the spring 16 is arranged between the elastic force adjusting bolt 15 and the ball contact 17.
The cylinder 20 is provided with a fastening bolt hole 18 for an elastic auxiliary device, and the cylinder 20 is connected with the fixed disk 8 through a mounting bolt.
When the ball-shaped contact 17 is installed, one end of the ball-shaped contact is positioned at the outer edge of the circular ring of the fixed disc 8, and the length direction of the fixed bottom plate 21 is consistent with the radial direction of the circular ring.
Through the extension and contraction of the spring 16 in the elastic force auxiliary device 9, the horizontal displacement caused by the lifting of the hoisting equipment in the process of disassembly or reassembly is balanced, so that the mechanical seal assembly 2 can move stably along the direction of the pump shaft 13 of the main pump (vertical direction in the figures 1 and 6).
The auxiliary tool for dismounting further comprises an auxiliary supporting cylinder 11 which is positioned outside the elastic force auxiliary device 9 and is matched with the elastic force auxiliary device 9 and the fixed disc 8 for use.
Claims (7)
1. The utility model provides a main pump machine seals subassembly dismouting appurtenance which characterized in that: the mechanical seal component comprises a fixed disk (8) arranged on a mechanical seal component (2) and a plurality of elastic auxiliary devices (9) arranged on the fixed disk (8), wherein the fixed disk (8) is in a circular ring shape, and the elastic auxiliary devices (9) are uniformly distributed in the circumferential direction of the circular ring-shaped fixed disk (8);
the elastic force auxiliary device (9) comprises a cylinder body (20) arranged on the fixed disk (8), and the length direction of the cylinder body is along the radial direction of the fixed disk (8); the device also comprises a fixed bottom plate (21) connected with the cylinder (20), a spring (16) and a spherical contact (17) which are arranged in the fixed bottom plate (21), and an elastic force adjusting bolt (15) with one end inserted into the fixed bottom plate (21) and the end contacted with the spring (16);
the ball-shaped contact (17) is arranged at an opening at one end of the fixed bottom plate (21), the ball-shaped contact (17) is positioned at the outer edge of the circular ring of the fixed plate (8), the elastic force adjusting bolt (15) is inserted into the other end of the fixed bottom plate (21), and a spring (16) is arranged between the elastic force adjusting bolt (15) and the ball-shaped contact (17).
2. The main pump mechanical seal assembly disassembly and assembly auxiliary tool of claim 1, wherein: the device also comprises an auxiliary supporting cylinder (11) arranged on the outer side of the elastic auxiliary device (9) and coaxial with the pump shaft of the main pump.
3. The main pump mechanical seal assembly disassembly and assembly auxiliary tool of claim 2, wherein: the spherical contact (17) is in contact with the auxiliary support cylinder (11), and the moments of pressing the spherical contacts (17) of the elastic auxiliary devices (9) on the auxiliary support cylinder (11) in the circumferential direction are the same.
4. The main pump mechanical seal assembly disassembly and assembly auxiliary tool of claim 3, wherein: the auxiliary support cylinder (11) is in a cylindrical shape with openings at the upper end and the lower end, the openings at the upper end and the lower end are provided with flange structures, and the auxiliary support cylinder (11) is connected with a main pump flange at the flange position by a machine seal outer pump shell fastening bolt (5).
5. The main pump mechanical seal assembly disassembly and assembly auxiliary tool of claim 4, wherein: and a bolt hole is processed in one side of a flange at the lower end of the auxiliary support cylinder (11), and a cylinder body adjusting bolt (12) is installed in the bolt hole.
6. The main pump mechanical seal assembly disassembly and assembly auxiliary tool of claim 1, wherein: the cylinder (20) is provided with an elastic auxiliary device fastening bolt hole (18), and the cylinder (20) is connected with the fixed disc (8) through the mounting bolt.
7. The main pump mechanical seal assembly disassembly and assembly auxiliary tool of claim 1, wherein: the fixed disk (8) is connected with the mechanical seal assembly (2) through a fixed disk fastening bolt hole (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023277575.8U CN215201724U (en) | 2020-12-30 | 2020-12-30 | Main pump mechanical seal subassembly dismouting appurtenance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023277575.8U CN215201724U (en) | 2020-12-30 | 2020-12-30 | Main pump mechanical seal subassembly dismouting appurtenance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215201724U true CN215201724U (en) | 2021-12-17 |
Family
ID=79436222
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023277575.8U Withdrawn - After Issue CN215201724U (en) | 2020-12-30 | 2020-12-30 | Main pump mechanical seal subassembly dismouting appurtenance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215201724U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112809617A (en) * | 2020-12-30 | 2021-05-18 | 江苏核电有限公司 | Main pump mechanical seal assembly dismounting auxiliary tool and mechanical seal assembly dismounting method |
-
2020
- 2020-12-30 CN CN202023277575.8U patent/CN215201724U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112809617A (en) * | 2020-12-30 | 2021-05-18 | 江苏核电有限公司 | Main pump mechanical seal assembly dismounting auxiliary tool and mechanical seal assembly dismounting method |
| CN112809617B (en) * | 2020-12-30 | 2024-04-09 | 江苏核电有限公司 | Main pump machine seal assembly disassembly and assembly auxiliary tool and machine seal assembly disassembly and assembly method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN215201724U (en) | Main pump mechanical seal subassembly dismouting appurtenance | |
| CN109434146B (en) | Squirrel-cage type core expanding mechanism for field overhaul equipment | |
| CN101593748A (en) | The series thyristor valve section that roof pressure connects | |
| CN101903644B (en) | Pelton turbine wheel, method for making same and pelton turbine including such wheel | |
| CN110116387B (en) | Breaker top shell and bottom shell dismounting device and method based on steering cylinder | |
| CN113339592B (en) | Quick-mounting type pipeline anti-seismic support and mounting method | |
| CN112809617B (en) | Main pump machine seal assembly disassembly and assembly auxiliary tool and machine seal assembly disassembly and assembly method | |
| CN100539130C (en) | Thyristor valve with component top-pressure mechanism | |
| CN215433450U (en) | Disassembling tool for pump seal assembly of reactor cooler | |
| CN209408383U (en) | A kind of positioning device | |
| CN201792168U (en) | Tool for pressing outer ring of special bearing | |
| CN209793057U (en) | servo press bearing mechanism | |
| CN210500107U (en) | Pneumatic valve overhauls uses security auxiliary device | |
| CN210436071U (en) | Auxiliary device is dismantled to coupler bolt | |
| CN220660715U (en) | Bearing dismounting tool | |
| CN219075520U (en) | Shafting dismouting device | |
| CN112677093B (en) | Disassembling tool and method for pump seal assembly of reactor cooler | |
| CN109955192B (en) | Be used for remote maintenance assembly and disassembly tools test device under water | |
| CN217545824U (en) | Motor rotor dismantles frock | |
| CN217776799U (en) | Special clamp for hydraulic plunger pump of airplane | |
| CN106542068A (en) | A kind of heat dissipation cabin body internal structure under water | |
| CN219035870U (en) | Pipeline flange | |
| CN218598293U (en) | Elastic guide mechanism between fan tower cylinders | |
| CN210650487U (en) | Nuclear power dedicated main pump oil seal dismounting device | |
| CN216303028U (en) | Nuclear power station generator bearing assembly and disassembly tools |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20211217 Effective date of abandoning: 20240409 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20211217 Effective date of abandoning: 20240409 |
|
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |