CN211737780U - Oil seal assembly for main water supply pump bearing of nuclear power plant - Google Patents
Oil seal assembly for main water supply pump bearing of nuclear power plant Download PDFInfo
- Publication number
- CN211737780U CN211737780U CN201921922262.8U CN201921922262U CN211737780U CN 211737780 U CN211737780 U CN 211737780U CN 201921922262 U CN201921922262 U CN 201921922262U CN 211737780 U CN211737780 U CN 211737780U
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- oil
- seal assembly
- nuclear power
- power plant
- pump bearing
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- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
- Sealing Of Bearings (AREA)
Abstract
The utility model belongs to the technical field of the nuclear power maintenance, concretely relates to an oil blanket subassembly that is used for nuclear power plant owner's water feed pump bearing. According to the oil seal assembly, the baffle of the oil retainer is used for shielding a gap between the labyrinth ring and the oil retainer, so that part of lubricating oil reflected to the oil seal assembly along the inner wall of the bearing body is prevented from splashing to the labyrinth ring, and the external lubricating grease can further enter the space between the oil retainer and the labyrinth ring less, so that the sealing performance of the oil seal assembly is improved, and the phenomenon of oil leakage of the main water pump bearing is reduced.
Description
Technical Field
The utility model belongs to the technical field of the nuclear power maintenance, concretely relates to an oil blanket subassembly that is used for nuclear power plant owner's water feed pump bearing.
Background
In a pressure-level pump of a main water feeding pump of a unit of a nuclear power plant in the related technology and a preposed pump thereof, an oil leakage phenomenon easily occurs in a bearing oil seal structure, and a labyrinth ring and an oil retainer ring in the bearing oil seal structure are easy to rub and engage in relative rotation, so that the abrasion of a groove cutting edge of the labyrinth ring is accelerated, and sparks are easily generated in serious conditions, thereby becoming a great hidden danger of safe and stable operation of a power station.
SUMMERY OF THE UTILITY MODEL
In order to overcome the problems in the related art, the oil seal assembly for the main water supply pump bearing of the nuclear power plant is provided.
According to an aspect of the disclosed embodiment, an oil seal assembly for a main water pump bearing of a nuclear power plant is provided, which is characterized in that the oil seal assembly comprises: labyrinth rings and slingers;
the surface of the oil scraper ring facing the labyrinth ring is provided with a first groove, and the labyrinth ring is inserted into the first groove;
the notch of the first groove is provided with a baffle plate extending towards the radial inner side at a position close to the outer wall of the oil retainer ring, the baffle plate can shield a gap between the labyrinth ring and the first groove, and the baffle plate is not contacted with the labyrinth ring.
In a possible realization mode, a sealing ring is arranged at the joint between the oil retainer and the rotating end of the water supply pump bearing.
In one possible embodiment, a second groove is formed in a surface of the slinger opposite to the rotating shaft, and the seal ring is pressed into a gap between the second groove and the rotating end.
In one possible implementation, the labyrinth ring includes a first snap half and a second snap half.
In one possible embodiment, the number of sealing teeth of the labyrinth ring is 4 to 9.
In one possible embodiment, the material of the labyrinth ring is different from the material of the oil scraper ring.
In one possible implementation, the material of the labyrinth ring comprises copper.
In one possible implementation, the material of the slinger comprises stainless steel.
The beneficial effects of the utility model reside in that: according to the oil seal assembly, the baffle of the oil retainer is used for shielding a gap between the labyrinth ring and the oil retainer, so that part of lubricating oil reflected to the oil seal assembly along the inner wall of the bearing body is prevented from splashing to the labyrinth ring, and the external lubricating grease can further enter the space between the oil retainer and the labyrinth ring less, so that the sealing performance of the oil seal assembly is improved, and the phenomenon of oil leakage of the main water pump bearing is reduced.
Drawings
FIG. 1 is a partial cross-sectional view of an oil seal assembly for a main feedwater pump bearing of a nuclear power plant shown in accordance with an exemplary embodiment.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
FIG. 1 is a partial cross-sectional view of an oil seal assembly for a main feedwater pump bearing of a nuclear power plant shown in accordance with an exemplary embodiment. As shown in fig. 1, the oil seal assembly for the main water pump bearing of the nuclear power plant may include: a labyrinth ring 3 and a slinger 4.
In the disclosed embodiment, the labyrinth ring 3 may be represented as a part having a plurality of grooves, the labyrinth ring 3 may be generally attached to the fixed end 2 of the bearing, the slinger 4 may be attached to the rotating end 1 of the bearing, a face of the slinger 4 facing the labyrinth ring 3 may have a first groove in which the labyrinth ring 3 is inserted, and a plurality of zigzag chambers may be formed between the labyrinth ring 3 and the slinger 4 to block grease from leaking out between the bearings, thereby forming a seal against the bearings.
As an example of this embodiment, a baffle extending toward the radial inner side may be formed at a position where the notch of the first groove of the slinger 4 is close to the outer wall of the slinger 4, and it should be noted that the baffle may be a straight plate or a curved plate having a radian, an included angle between the baffle and the side wall of the groove may be any angle as long as the baffle can block a gap between the labyrinth ring 3 and the first groove, the specific shape of the baffle is not limited in the embodiment of the present disclosure, and the edge of the baffle may not contact the labyrinth ring 3.
According to the oil seal assembly, the baffle of the oil retainer is used for shielding a gap between the labyrinth ring and the oil retainer, so that part of lubricating oil reflected to the oil seal assembly along the inner wall of the bearing body is prevented from splashing to the labyrinth ring, and the external lubricating grease can further enter the space between the oil retainer and the labyrinth ring less, so that the sealing performance of the oil seal assembly is improved, and the phenomenon of oil leakage of the main water pump bearing is reduced.
In a possible implementation, a sealing ring 5 may be provided at the connection between the slinger 4 and the rotating shaft. For example, one surface of the slinger 4 opposite to the rotating shaft may be provided with a second groove, the size of the second groove may be smaller than that of the seal ring 5, the seal ring 5 may be pressed in the second groove, and the surface of the slinger 4, on which the seal ring 5 is pressed, is pressed on the rotating end 1 of the bearing, so that the seal ring 5 is pressed in the gap between the second groove and the rotating end 1, and a gap between the slinger 4 and the rotating shaft may be further sealed, thereby enhancing the sealing performance of the seal assembly. In a possible implementation manner, the sealing ring 5 may be adhered to a surface of the slinger 4 facing the bearing rotating end 1, and the connection manner of the sealing ring 5 and the slinger 4 is not limited in the embodiment of the present disclosure.
In one possible implementation, the labyrinth ring 3 may include a first snap half and a second snap half. Like this, wherein first lock half can be through connection structure and second lock half lock, like this, need not to wear the axle when installation labyrinth ring 3, the field installation of labyrinth ring 3 of being convenient for.
In a possible implementation mode, axial drilling and circumferential reaming can be added on the inner side of the labyrinth ring 3, medium in an oil groove can flow back to the inside of the bearing body conveniently, and the bearing is prevented from throwing oil to the outside.
In a possible implementation, the number of grooves of the labyrinth ring 3 is 4 to 9. In the related art, the number of grooves of the labyrinth ring 3 is 2 to 3, for example, the number of grooves of the labyrinth ring 3 may be 7, so that the amount of oil leakage can be further reduced by increasing the number of grooves of the labyrinth ring to increase the amount of oil stored in the labyrinth ring. In a possible implementation mode, the number of oil return holes in the labyrinth ring seal teeth can be increased, and medium in the oil groove can flow back to the bearing body conveniently.
In a possible implementation, the material of the labyrinth ring 3 may be different from the material of the slinger 4. For example, the material of the labyrinth ring 3 may include copper. The material of the slinger 4 may be stainless steel (e.g., 316L stainless steel). Like this, the material of labyrinth 3 and slinger 4 is different, and when slinger 4 rotated for labyrinth 3, interlock and friction can take place less between the two, be favorable to increasing seal assembly's life, reduce the operation risk of equipment.
In one application example, the labyrinth ring 3 and the oil deflector ring 4 can be verified to have an axial clearance of 1-1.5mm by mounting the lower half of the labyrinth ring 3 on the fixed end 2 of the bearing after the half bearing is uncovered. The upper half of the labyrinth ring 3 can then be installed and the upper bearing cap can be reinstalled.
It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. It is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.
Claims (8)
1. The utility model provides an oil blanket subassembly that is used for nuclear power plant owner's water feed pump bearing which characterized in that, oil blanket subassembly includes: labyrinth rings and slingers;
the surface of the oil scraper ring facing the labyrinth ring is provided with a first groove, and the labyrinth ring is inserted into the first groove;
the notch of the first groove is provided with a baffle plate extending towards the radial inner side at a position close to the outer wall of the oil retainer ring, the baffle plate can shield a gap between the labyrinth ring and the first groove, and the baffle plate is not contacted with the labyrinth ring.
2. The oil seal assembly for a main water feed pump bearing of a nuclear power plant as claimed in claim 1, wherein a seal ring is provided at a connection between the oil slinger and a rotating end of the water feed pump bearing.
3. The oil seal assembly for a main water feed pump bearing of a nuclear power plant as claimed in claim 2, wherein a face of the oil slinger opposite to the rotating end is provided with a second groove, and the seal ring is squeezed in a gap between the second groove and the rotating end.
4. The oil seal assembly for a nuclear power plant main feed pump bearing of claim 1, wherein said labyrinth ring includes a first snap-fit half and a second snap-fit half.
5. The oil seal assembly for a main feedwater pump bearing of a nuclear power plant of claim 1, wherein the number of grooves of the labyrinth ring is 4 to 9.
6. The oil seal assembly for a main feedwater pump bearing of a nuclear power plant of claim 1 wherein the material of the labyrinth ring is different from the material of the slinger.
7. The oil seal assembly for a main feedwater pump bearing of nuclear power plant of claim 6 wherein the material of the labyrinth ring comprises copper.
8. The oil seal assembly for a main feedwater pump bearing of nuclear power plant of claim 6, wherein the material of the slinger comprises stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921922262.8U CN211737780U (en) | 2019-11-08 | 2019-11-08 | Oil seal assembly for main water supply pump bearing of nuclear power plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921922262.8U CN211737780U (en) | 2019-11-08 | 2019-11-08 | Oil seal assembly for main water supply pump bearing of nuclear power plant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211737780U true CN211737780U (en) | 2020-10-23 |
Family
ID=72874313
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921922262.8U Active CN211737780U (en) | 2019-11-08 | 2019-11-08 | Oil seal assembly for main water supply pump bearing of nuclear power plant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211737780U (en) |
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2019
- 2019-11-08 CN CN201921922262.8U patent/CN211737780U/en active Active
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