CN211733621U - Tool for lifting main coolant pump rotor of nuclear power station - Google Patents
Tool for lifting main coolant pump rotor of nuclear power station Download PDFInfo
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- CN211733621U CN211733621U CN201922264532.7U CN201922264532U CN211733621U CN 211733621 U CN211733621 U CN 211733621U CN 201922264532 U CN201922264532 U CN 201922264532U CN 211733621 U CN211733621 U CN 211733621U
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Abstract
The utility model belongs to the technical field of maintenance of key equipment of nuclear power plants, in particular to a tool for lifting a rotor of a main coolant pump of a nuclear power plant, which comprises a hexagonal nut, a supporting sleeve, a stud, a planar ball bearing, a positioning sleeve and a bearing seat; the hexagonal nut is directly connected with the stud through threads; the support sleeve is a cylindrical special-shaped sleeve and is directly sleeved on the stud and in clearance fit with the stud; the supporting sleeve is in clearance fit with the positioning sleeve; the design uses new promotion frock, very big reduction the main pump rotor promote the in-process bolt risk of dying, make the field operation become laborsaving, high-efficient, safety.
Description
Technical Field
The utility model belongs to the technical field of nuclear power plant key equipment maintenance, concretely relates to frock that is used for nuclear power station main coolant pump rotor to promote.
Background
Taking a certain nuclear power station main pump as an example, the nuclear main pump needs to carry out the lifting and falling operation of the rotor for many times in the installation and maintenance processes, so that the sealing of the rotor back seat is realized, and the maintenance condition is reached.
In the past, the lifting and falling operation of a rotor of a main pump is carried out by using a common stud and an outer hexagonal nut. When the rotor of the main pump is lifted and falls, the rotor of the main pump is heavy (about 3 tons), the nut is very laborious to rotate, and the connecting thread of the stud and the pump shaft, the stud and the nut and the like are easy to seize, so that the pump shaft is damaged and the like are abnormal.
Therefore, when the main pump rotor is lifted and falls, the problems of construction period, quality, safety and the like of operation cannot be effectively guaranteed, and rework or damage events of personnel and important equipment parts are caused if the abnormality occurs. Meanwhile, the waste of manpower, material resources and construction period is increased; the risk of personnel operation is increased, the collective radiation dose of operation groups is increased after the unit is in business use, and the like.
Therefore, a new tool is urgently needed to solve the problems.
Disclosure of Invention
Not enough more than, the utility model aims at providing a change a frock that is used for nuclear power station main coolant pump rotor to promote to reduce wastes such as manpower, material resources and time limit for a project, also greatly reduced operation risk and personnel radiation dose simultaneously.
The technical scheme of the utility model as follows:
a tool for lifting a rotor of a main coolant pump of a nuclear power station comprises a hexagonal nut, a supporting sleeve, a stud, a planar ball bearing, a positioning sleeve and a bearing seat;
the hexagonal nut is directly connected with the stud through threads;
the support sleeve is a cylindrical special-shaped sleeve and is directly sleeved on the stud and in clearance fit with the stud;
the supporting sleeve is in clearance fit with the positioning sleeve;
the stud adopts a cylindrical through thread screw rod, one end of the screw rod is processed into an external hexagonal shape, and the stud is in threaded connection with a hexagonal nut; the fit relation among the stud, the support sleeve and the bearing seat is clearance fit;
the bearing seat is a cylindrical special-shaped sleeve, the matching surface of the inner circumferential surface of the bearing seat and the outer circumferential surface of the positioning sleeve is a thread, and the bearing seat is in threaded connection with the positioning sleeve; the bearing seat is in interference fit with the circumferential surface of the plane ball bearing;
the lower part of the plane ball bearing is arranged on a component bearing seat, and the upper part of the plane ball bearing supports a bearing sleeve;
the positioning sleeve is a cylindrical special-shaped sleeve, the matching surface of the outer circumferential surface of the positioning sleeve and the inner circumferential surface of the bearing seat of the component is a thread, and the positioning sleeve is in threaded connection with the bearing seat; the positioning sleeve is in clearance fit with the supporting sleeve and the circumferential surface of the plane ball bearing.
The support sleeve is used for axially supporting the hexagonal nut and the planar ball bearing, and axial force of the hexagonal nut can be transmitted to the planar ball bearing.
The hexagonal nut is an outer hexagonal nut.
The bearing block is provided with a spigot groove, and the plane ball bearing is arranged in the spigot groove matched with the bearing block.
And injecting lubricating grease into the plane ball bearing, and smearing an anti-biting agent at the thread position on the inner side of the bearing seat.
The axial clearance of the support sleeve does not exceed the maximum axial clearance of the plane ball bearing.
The stud is arranged at one end of the hexagonal head of the stud outwards and needs to be lifted into a corresponding bolt hole of the rotor.
The locating sleeve is screwed into the bearing seat through threads.
The beneficial effects of the utility model reside in that:
design and use new promotion frock, very big reduction the main pump rotor promote the risk that the in-process bolt was stung, make the field operation become laborsaving, high-efficient, safety, its advantage mainly by following several aspects:
1) the operation is labor-saving. The sliding friction between the original nut and the component is changed into the rolling friction of the plane bearing, so that the operation is more labor-saving and light.
2) The need for manpower is reduced. The tool can reduce the number of people in operation by more than half and is easy and effortless in the operation process.
3) The bolt seizure abnormity is greatly reduced, and the safety risk of personnel and equipment is reduced.
4) The tool is easy to assemble and operate, is stable and reliable, greatly reduces the risk degree of operation, and reduces safety risks.
5) The construction period is shortened, and the collective dosage is reduced. The new tool is used for overhauling after nuclear power business, the number of people for matching operation is reduced, the working time is shortened, and the collective radiation dose can be effectively reduced.
Drawings
FIG. 1 is a schematic view of a tool for lifting a rotor of a main coolant pump of a nuclear power station according to the present invention;
in the figure: 1. a hexagonal nut; 2. a support sleeve; 3. a stud; 4. a bearing seat; 5. a flat ball bearing; 6. a positioning sleeve.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
A tool for lifting a rotor of a main coolant pump of a nuclear power station comprises a hexagonal nut 1, a supporting sleeve 2, a stud 3, a planar ball bearing 5, a positioning sleeve 6 and a bearing seat 4. The tool design structure diagram is shown in figure 1:
the hexagonal nut 1 is a common external hexagonal nut. The connection is made directly by means of a thread with the component stud 3.
The supporting sleeve 2 is a cylindrical special-shaped sleeve. The component stud 3 is directly sleeved with the component stud in a clearance fit manner; the axial support is used for axial support between the component hexagonal nut 1 and the component planar ball bearing 5, and the axial force of the component hexagonal nut 1 can be transmitted to the component planar ball bearing 5; the component supporting sleeve 2 is in clearance fit with the component positioning sleeve 6.
The stud 3 is a cylindrical through thread screw rod, and one end of the screw rod is processed into an external hexagon shape. The stud 3 is in threaded connection with the hexagonal nut 1; is in clearance fit with the component supporting sleeve 2 and the component bearing seat 4.
The bearing seat 4 is a cylindrical special-shaped sleeve, and the matching surface of the inner circumferential surface of the bearing seat and the outer circumferential surface of the component positioning sleeve 6 is a harness cord thread. The component bearing seat 4 is in threaded connection with the component positioning sleeve 6; and is in interference fit with the circumferential surface of the component plane ball bearing 5.
The flat ball bearing 5 is a general flat ball bearing 5. The lower part of which is mounted on the component bearing block 4 and the upper part of which supports the bearing housing 2.
The positioning sleeve 6 is a cylindrical special-shaped sleeve, and the matching surface of the outer circumferential surface and the inner circumferential surface of the component bearing seat 4 is a harness cord thread. The component positioning sleeve 6 is in threaded connection with the component bearing seat 4; is in clearance fit with the circumferential surfaces of the component support sleeve 2 and the component plane ball bearing 5.
A tool for lifting a rotor of a main coolant pump of a nuclear power station comprises a hexagonal nut 1, a support sleeve 2, a stud 3, a planar ball bearing 5, a positioning sleeve 6 and a bearing seat 4;
the hexagonal nut 1 is directly connected with the component stud 3 through threads;
the support sleeve 2 is a cylindrical special-shaped sleeve and is directly sleeved on the stud 3 of the component and is in clearance fit with the stud 3;
the supporting sleeve 2 is in clearance fit with the positioning sleeve 6;
the stud 3 is a cylindrical through thread screw rod, one end of the screw rod is processed into an external hexagonal shape, and the stud 3 is in threaded connection with the hexagonal nut 1; the fit relation among the stud 3, the support sleeve 2 and the bearing seat 4 is clearance fit;
the bearing seat 4 is a cylindrical special-shaped sleeve, the matching surface of the inner circumferential surface of the bearing seat and the outer circumferential surface of the positioning sleeve 6 is a thread, and the bearing seat 4 is in threaded connection with the component positioning sleeve 6; the bearing seat 4 is in interference fit with the circumferential surface of the plane ball bearing 5;
the lower part of the plane ball bearing 5 is arranged on the component bearing seat 4, and the upper part supports the bearing sleeve 2.
The positioning sleeve 6 is a cylindrical special-shaped sleeve, the matching surface of the outer circumferential surface of the positioning sleeve and the inner circumferential surface of the bearing seat 4 of the component is a thread, and the positioning sleeve 6 is in threaded connection with the bearing seat 4; the positioning sleeve 6 is in clearance fit with the supporting sleeve 2 and the circumferential surface of the plane ball bearing 5.
The support sleeve 2 is used for axial support between the hexagonal nut 1 and the plane ball bearing 5, and ensures that the axial force of the hexagonal nut of the component 1 can be transmitted to the plane ball bearing 5.
The hexagonal nut is an outer hexagonal nut.
Grease is injected into the plane ball bearing 5, and the anti-biting agent is coated on the inner side thread of the bearing seat 4.
The axial play of the support sleeve 2 does not exceed the maximum axial play of the flat ball bearing 5.
The stud 3 is arranged at one end of the hexagonal head of the stud 3 outwards and needs to be lifted in a corresponding bolt hole of the rotor.
The positioning sleeve 6 is screwed into the bearing seat 4.
The assembly step of this frock:
1) a heating component bearing seat 4, wherein a component plane ball bearing 5 is arranged in a corresponding spigot groove of the component bearing seat 4 according to the figure 1;
2) after cooling to normal temperature, injecting lubricating grease into the component plane ball bearing 5, and smearing anti-biting agent on the inner side thread of the component bearing seat 4;
3) placing the component support sleeve 2 on the component plane ball bearing 5;
4) slowly screwing the component positioning sleeve 6 into the bearing seat 4 through threads;
5) the manual rotating part supporting sleeve 2 is flexible to check and free of jamming, if the part 2 supporting sleeve cannot rotate easily, the part positioning sleeve 6 needs to be screwed out slightly, and the axial clearance of the part supporting sleeve 2 is guaranteed not to exceed the maximum axial clearance of the part plane ball bearing 5.
6) Installing a part stud 3 in a corresponding bolt hole of a rotor to be lifted (one end of the hexagonal head of the part stud 3 is outward), and then installing the integrated part assembled in the steps 1-5 in the part stud 3; finally, the hexagonal nut of the component 1 is slowly screwed into the stud 3 of the component.
7) The tightness of the hexagonal nut 1 of the rotating part is adjusted, and the purpose of lifting and falling of a rotor of the main pump is achieved.
Claims (8)
1. A tool for lifting a rotor of a main coolant pump of a nuclear power station comprises a hexagonal nut, a supporting sleeve, a stud, a planar ball bearing, a positioning sleeve and a bearing seat;
the method is characterized in that:
the hexagonal nut is directly connected with the stud through threads;
the support sleeve is a cylindrical special-shaped sleeve and is directly sleeved on the stud and in clearance fit with the stud;
the supporting sleeve is in clearance fit with the positioning sleeve;
the stud adopts a cylindrical through thread screw rod, one end of the screw rod is processed into an external hexagonal shape, and the stud is in threaded connection with a hexagonal nut; the fit relation among the stud, the support sleeve and the bearing seat is clearance fit;
the bearing seat is a cylindrical special-shaped sleeve, the matching surface of the inner circumferential surface of the bearing seat and the outer circumferential surface of the positioning sleeve is a thread, and the bearing seat is in threaded connection with the positioning sleeve; the bearing seat is in interference fit with the circumferential surface of the plane ball bearing;
the lower part of the plane ball bearing is arranged on a component bearing seat, and the upper part of the plane ball bearing supports a bearing sleeve;
the positioning sleeve is a cylindrical special-shaped sleeve, the matching surface of the outer circumferential surface of the positioning sleeve and the inner circumferential surface of the bearing seat of the component is a thread, and the positioning sleeve is in threaded connection with the bearing seat; the positioning sleeve is in clearance fit with the supporting sleeve and the circumferential surface of the plane ball bearing.
2. The tool for lifting the rotor of the main coolant pump of the nuclear power station as claimed in claim 1, wherein: the support sleeve is used for axially supporting the hexagonal nut and the planar ball bearing, and axial force of the hexagonal nut can be transmitted to the planar ball bearing.
3. The tool for lifting the rotor of the main coolant pump of the nuclear power station as claimed in claim 1 or 2, wherein: the hexagonal nut is an outer hexagonal nut.
4. The tool for lifting the rotor of the main coolant pump of the nuclear power station as claimed in claim 1, wherein: the bearing block is provided with a spigot groove, and the plane ball bearing is arranged in the spigot groove matched with the bearing block.
5. The tool for lifting the rotor of the main coolant pump of the nuclear power station as claimed in claim 1, wherein: and injecting lubricating grease into the plane ball bearing, and smearing an anti-biting agent at the thread position on the inner side of the bearing seat.
6. The tool for lifting the rotor of the main coolant pump of the nuclear power station as claimed in claim 1, wherein: the axial clearance of the support sleeve does not exceed the maximum axial clearance of the plane ball bearing.
7. The tool for lifting the rotor of the main coolant pump of the nuclear power station as claimed in claim 1, wherein: the stud is arranged at one end of the hexagonal head of the stud outwards and needs to be lifted into a corresponding bolt hole of the rotor.
8. The tool for lifting the rotor of the main coolant pump of the nuclear power station as claimed in claim 1, wherein: the locating sleeve is screwed into the bearing seat through threads.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922264532.7U CN211733621U (en) | 2019-12-17 | 2019-12-17 | Tool for lifting main coolant pump rotor of nuclear power station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922264532.7U CN211733621U (en) | 2019-12-17 | 2019-12-17 | Tool for lifting main coolant pump rotor of nuclear power station |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211733621U true CN211733621U (en) | 2020-10-23 |
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ID=72869936
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922264532.7U Active CN211733621U (en) | 2019-12-17 | 2019-12-17 | Tool for lifting main coolant pump rotor of nuclear power station |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211733621U (en) |
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2019
- 2019-12-17 CN CN201922264532.7U patent/CN211733621U/en active Active
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