CN210265245U - Dynamic pressure bearing for primary loop main pump of lead-bismuth reactor - Google Patents
Dynamic pressure bearing for primary loop main pump of lead-bismuth reactor Download PDFInfo
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- CN210265245U CN210265245U CN201920915671.9U CN201920915671U CN210265245U CN 210265245 U CN210265245 U CN 210265245U CN 201920915671 U CN201920915671 U CN 201920915671U CN 210265245 U CN210265245 U CN 210265245U
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Abstract
The utility model discloses a dynamic pressure bearing for a primary loop main pump of a lead bismuth reactor, which is arranged on a pump shaft, wherein the dynamic pressure bearing adopts a single-oil wedge cylindrical dynamic pressure bearing, the pump shaft is vertically arranged, the dynamic pressure bearing is sleeved at the lower end of the pump shaft, a shaft sleeve is arranged between the pump shaft and the dynamic pressure bearing, and a wedge convergence gap with a large lower part and a small upper part is formed between the dynamic pressure bearing and the pump shaft; the friction pair of the dynamic pressure bearing is made of overlaying high-temperature-resistant and wear-resistant stellite alloy, and the surface smoothness of the overlaid stellite alloy is lower than 0.8 mu m. The utility model discloses a dynamic pressure bearing for a main circuit main pump of a lead bismuth reactor, which utilizes the lead bismuth medium of the pump cavity to realize the lubrication and the bearing of the bearing, and does not need the external pressure and the medium lubrication; the dynamic pressure bearing is wide in applicable rotating speed range, wide in application range, high in efficiency, long in service life, simple in structure and convenient to machine, manufacture and install.
Description
Technical Field
The utility model relates to a dynamic pressure bearing that is used for a lead bismuth reactor return circuit main pump.
Background
The lead bismuth pump is used for driving a reactor coolant (liquid lead bismuth alloy) to circularly flow in a primary loop system and transferring the heat of a reactor core to the main heat exchanger; meanwhile, the pressure-bearing part of the lead-bismuth pump belongs to an important component of a pressure boundary of a primary loop system of the reactor and is a second barrier for preventing radioactive substances and toxic substances from leaking. The pump shaft is supported by a lower sliding bearing and an upper bearing, and at present, the pump shaft is used for lubricating and bearing a primary main pump of the lead-bismuth reactor and lacks of a proper sliding bearing.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the defects of the prior art and providing a dynamic pressure bearing for a primary loop main pump of a lead bismuth reactor, which utilizes lead bismuth medium of a pump cavity to realize the lubrication and bearing of the bearing without external pressure and medium lubrication; the dynamic pressure bearing is wide in applicable rotating speed range, wide in application range, high in efficiency, long in service life, simple in structure and convenient to machine, manufacture and install.
The technical scheme for realizing the purpose is as follows: a dynamic pressure bearing for a primary loop main pump of a lead-bismuth reactor is arranged on a pump shaft, the dynamic pressure bearing adopts a single-oil-wedge cylindrical dynamic pressure bearing, the pump shaft is vertically arranged, the dynamic pressure bearing is sleeved at the lower end of the pump shaft through a shaft sleeve, and a wedge-shaped convergence gap with a large lower part and a small upper part is formed between the dynamic pressure bearing and the pump shaft;
the friction pair of the dynamic pressure bearing is made of overlaying high-temperature-resistant and wear-resistant stellite alloy, and the surface smoothness of the overlaid stellite alloy is lower than 0.8 mu m.
The dynamic pressure bearing for the primary circuit main pump of the lead-bismuth reactor moves relative to the shaft sleeve, so that a lead-bismuth medium in the primary circuit main pump is brought to a small opening from a large opening of the wedge-shaped convergence gap to form an oil wedge, and a liquid film for bearing a load is generated.
The utility model discloses a dynamic pressure bearing for a main circuit main pump of a lead bismuth reactor, which utilizes the lead bismuth medium of the pump cavity to realize the lubrication and the bearing of the bearing, and does not need the external pressure and the medium lubrication; the dynamic pressure bearing is wide in applicable rotating speed range, wide in application range, high in efficiency, long in service life, simple in structure and convenient to machine, manufacture and install.
Drawings
Fig. 1 is a structural diagram of a dynamic pressure bearing for a primary loop main pump of a lead bismuth reactor.
Detailed Description
In order to make the technical solution of the present invention better understood by those skilled in the art, the following detailed description is provided with reference to the accompanying drawings:
referring to fig. 1, in the preferred embodiment of the present invention, a hydrodynamic bearing 1 for a primary loop main pump of a lead-bismuth reactor is mounted on a pump shaft 2, the hydrodynamic bearing 1 is a single oil wedge cylindrical hydrodynamic bearing, the pump shaft 2 is vertically disposed, the hydrodynamic bearing 1 is sleeved at the lower end of the pump shaft 2 through a shaft sleeve 3, and a wedge-shaped convergence gap with a large lower end and a small upper end is formed between the hydrodynamic bearing 1 and the pump shaft 2; the friction pair of the dynamic pressure bearing 1 is made of overlaying high-temperature-resistant and wear-resistant stellite alloy, and the surface smoothness of the overlaid stellite alloy is lower than 0.8 mu m.
When the dynamic pressure bearing device is used, the dynamic pressure bearing 1 is used for supporting a pump rotor part together with a combined bearing at the upper part of a pump set, namely (a sliding bearing) is immersed in liquid lead bismuth, the dynamic pressure bearing 1 and a shaft sleeve 3 move relatively, a lead bismuth medium is brought to a small opening from a large opening of a wedge-shaped convergence gap by using the pressure at the outlet of the impeller, an oil wedge is formed, a liquid film bearing a load is further generated, the lubrication and the bearing of the dynamic pressure bearing 1 are realized, and the external pressure and the medium lubrication are not needed; the dynamic pressure bearing has the advantages of wide applicable rotating speed range, wide application range, high efficiency, long service life, simple structure and convenient processing, manufacturing and installation.
The dynamic pressure bearing for the primary loop main pump of the lead bismuth reactor has the advantages that the dynamic pressure bearing 1 has small frictional resistance and high efficiency; the applicable rotating speed range is wide, the liquid lubricating effect is achieved at various relative operating speeds, and the bearing capacity is achieved; the service life is long, and the precision retentivity is good; the liquid film has an average error function, so that the influence of the manufacturing errors of the pump shaft 2 and the dynamic pressure bearing 1 can be reduced; the dynamic pressure bearing 1 has a wide application range and is applicable to light load, heavy load, high speed and low speed.
In summary, the dynamic pressure bearing for the primary loop main pump of the lead bismuth reactor of the utility model utilizes the lead bismuth medium in the pump cavity to realize the lubrication and bearing of the bearing without the need of external pressure and medium lubrication; the dynamic pressure bearing is wide in applicable rotating speed range, wide in application range, high in efficiency, long in service life, simple in structure and convenient to machine, manufacture and install.
It will be appreciated by those skilled in the art that the above embodiments are only for illustrating the present invention and are not to be used as limitations of the present invention, and that changes and modifications to the above described embodiments will fall within the scope of the claims of the present invention as long as they are within the spirit and scope of the present invention.
Claims (2)
1. A dynamic pressure bearing for a primary loop main pump of a lead-bismuth reactor is arranged on a pump shaft, and is characterized in that the dynamic pressure bearing adopts a single-oil-wedge cylindrical dynamic pressure bearing, the pump shaft is vertically arranged, the dynamic pressure bearing is sleeved at the lower end of the pump shaft through a shaft sleeve, and a wedge-shaped convergence gap with a large lower part and a small upper part is formed between the dynamic pressure bearing and the pump shaft;
the friction pair of the dynamic pressure bearing is made of overlaying high-temperature-resistant and wear-resistant stellite alloy, and the surface smoothness of the overlaid stellite alloy is lower than 0.8 mu m.
2. The dynamic pressure bearing for a primary circuit main pump of a lead-bismuth reactor as claimed in claim 1, wherein the dynamic pressure bearing and the shaft sleeve move relatively to each other, so that lead-bismuth medium in the primary circuit main pump is brought from a large opening to a small opening of the wedge-shaped convergent gap to form an oil wedge, and a liquid film bearing a load is generated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920915671.9U CN210265245U (en) | 2019-06-18 | 2019-06-18 | Dynamic pressure bearing for primary loop main pump of lead-bismuth reactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920915671.9U CN210265245U (en) | 2019-06-18 | 2019-06-18 | Dynamic pressure bearing for primary loop main pump of lead-bismuth reactor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210265245U true CN210265245U (en) | 2020-04-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920915671.9U Active CN210265245U (en) | 2019-06-18 | 2019-06-18 | Dynamic pressure bearing for primary loop main pump of lead-bismuth reactor |
Country Status (1)
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| CN (1) | CN210265245U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112648193A (en) * | 2020-12-16 | 2021-04-13 | 江苏飞跃机泵集团有限公司 | Forced circulation lead-bismuth pump |
-
2019
- 2019-06-18 CN CN201920915671.9U patent/CN210265245U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112648193A (en) * | 2020-12-16 | 2021-04-13 | 江苏飞跃机泵集团有限公司 | Forced circulation lead-bismuth pump |
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| GR01 | Patent grant | ||
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| TR01 | Transfer of patent right |
Effective date of registration: 20221107 Address after: 518000 Futian District, Shenzhen, Guangdong, Futian District, 15 steps (1502-1504, 1506) of Shenzhen science and technology building. Patentee after: CHINA NUCLEAR POWER TECHNOLOGY RESEARCH INSTITUTE Co.,Ltd. Patentee after: SHANGHAI APOLLO MACHINERY Co.,Ltd. Address before: No. 555, Yisong Road, Nanqiao Town, Fengxian District, Shanghai 201401 Patentee before: SHANGHAI APOLLO MACHINERY Co.,Ltd. |
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| TR01 | Transfer of patent right |