CN216077704U - Nuclear power station booster pump sealing device and nuclear power station booster pump - Google Patents
Nuclear power station booster pump sealing device and nuclear power station booster pump Download PDFInfo
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- CN216077704U CN216077704U CN202120820308.6U CN202120820308U CN216077704U CN 216077704 U CN216077704 U CN 216077704U CN 202120820308 U CN202120820308 U CN 202120820308U CN 216077704 U CN216077704 U CN 216077704U
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Abstract
The utility model belongs to the technical field of secondary loop main feed pumps of nuclear power plants, and particularly relates to a sealing device of a booster pump of a nuclear power plant and the booster pump of the nuclear power plant. The sealing device for the booster pump of the nuclear power station comprises an outer sleeve, an inner sleeve, an elastic component, a mounting block, a heat dissipation wheel, a static sealing ring and a dynamic sealing ring arranged on the inner sleeve; the mounting block is mounted on the outer sleeve through the elastic assembly; the static sealing ring is arranged on the mounting block, and the dynamic sealing ring is in sealing connection with the static sealing ring in a rotating mode; the heat dissipation wheel is installed on the inner sleeve, and the heat dissipation wheel is arranged opposite to the dynamic sealing ring and the static sealing ring. According to the utility model, the sealing device for the booster pump of the nuclear power station has good sealing performance.
Description
Technical Field
The utility model belongs to the technical field of secondary loop main feed pumps of nuclear power plants, and particularly relates to a sealing device of a booster pump of a nuclear power plant and the booster pump of the nuclear power plant.
Background
In nuclear power plants, large quantities of water are used during operation, which water is typically pressurized by a booster pump and then fed to the water-consuming equipment of the plant. The sealing of the booster pump is usually a mechanical sealing mode, the mechanical sealing is usually a dynamic sealing ring assembly arranged on a rotating shaft and a static sealing ring assembly arranged on a shell, and the sealing performance of the booster pump is ensured by the sealing performance between the dynamic sealing ring and the static sealing ring. However, in the prior art, the dynamic seal ring and the static seal ring of the mechanical seal structure of the booster pump generally have the problem that the sealing performance of the dynamic seal ring and the static seal ring is invalid due to overhigh temperature or abnormal abrasion.
SUMMERY OF THE UTILITY MODEL
The utility model provides a nuclear power station booster pump sealing device and a nuclear power station booster pump, aiming at the technical problems of poor sealing performance and the like of the existing booster pump sealing structure.
In view of the above technical problems, an embodiment of the present invention provides a sealing device for a nuclear power station booster pump, including an outer sleeve, an inner sleeve, an elastic component, a mounting block, a heat dissipation wheel, a static sealing ring, and a dynamic sealing ring mounted on the inner sleeve; the mounting block is mounted on the outer sleeve through the elastic assembly; the static sealing ring is arranged on the mounting block, and the dynamic sealing ring is connected with the static sealing ring in a sealing manner;
the heat dissipation wheel is installed on the inner sleeve, and the heat dissipation wheel is arranged opposite to the dynamic sealing ring and the static sealing ring.
Optionally, the elastic assembly comprises a first elastic member, a first guide post and an elastic loading sealing ring; the mounting block is mounted on the outer sleeve through the guide column; a first mounting groove and a second mounting groove which are distributed at intervals are formed between the mounting block and the outer sleeve; the first elastic piece is arranged in the first mounting groove, the elastic loading sealing ring is arranged in the second mounting groove, and the mounting block is arranged on the outer sleeve through the first elastic piece and the elastic loading sealing ring.
Optionally, the elastic loading seal ring comprises a second elastic member and a first seal ring provided with an annular groove, the first seal ring is installed in the second installation groove, and the second elastic member is installed in the annular groove.
Optionally, an abrasion-resistant layer is arranged on the inner wall of the second mounting groove, and the abrasion-resistant layer is abutted to the outer wall of the first sealing ring.
Optionally, a sealing groove is formed in the inner wall of the inner sleeve, and the sealing device for the nuclear power station booster pump further comprises a second sealing ring installed in the sealing groove.
Optionally, the nuclear power plant booster pump sealing arrangement further comprises a first seal support; the inner sleeve is provided with a first accommodating groove, the first sealing support piece is arranged in the first accommodating groove, and the first sealing support piece is connected with the dynamic sealing ring.
Optionally, the nuclear power plant booster pump sealing arrangement further comprises a second seal support; the outer sleeve is provided with a second accommodating groove, the second sealing support piece is installed in the second accommodating groove, and the second sealing support piece is connected with the static sealing ring.
Optionally, the sealing device for the booster pump of the nuclear power plant further comprises a fixing piece, and the static sealing ring is installed on the installation block through the fixing piece.
Optionally, an observation cavity is formed among the inner wall of the static sealing ring, the inner walls of the dynamic sealing ring and the mounting block and the outer wall of the inner sleeve, and the observation cavity is communicated with the external environment.
The utility model further provides a nuclear power station booster pump, which comprises a rotating shaft and the sealing device of the nuclear power station booster pump, wherein the rotating shaft is arranged in the inner sleeve.
In the utility model, the mounting block is mounted on the outer sleeve through the elastic component; the static sealing ring is arranged on the mounting block, the dynamic sealing ring is arranged on the inner sleeve, and the dynamic sealing ring rotates and is in sealing connection with the static sealing ring; the heat dissipation wheel is installed on the inner sleeve, and the heat dissipation wheel is arranged opposite to the dynamic sealing ring and the static sealing ring. The elastic assembly can adjust pressing force between the outer sleeve and the mounting block in real time, and due to the fact that relative rotation exists between the dynamic sealing ring and the static sealing ring, the elastic assembly can control the contact force of the sealing ring and the static sealing ring within a proper range through the mounting block, and the phenomenon that the temperature of the sealing ring and the static sealing ring is too high due to the fact that the contact force of the dynamic sealing ring and the static sealing ring is too large, and further the sealing performance of the dynamic sealing ring and the static sealing ring is invalid is avoided. The dynamic sealing ring and the static sealing ring prevent water on the outer surfaces of the dynamic sealing ring and the static sealing ring from flowing into a gap between the outer sleeve and the inner sleeve in the process that the inner sleeve rotates relative to the outer sleeve. And, the inner skleeve drives the pivoted in-process of heat dissipation wheel, the pivoted heat dissipation wheel can drive the high-speed circulation of cooling water of movable seal circle with quiet sealing washer department flows to can play for the effect of movable seal circle with the cooling of quiet sealing washer, avoided movable seal circle with quiet sealing washer leads to the sealing function to become invalid because of the high temperature. The sealing device for the booster pump of the nuclear power station has the advantages of high sealing performance, simple structure, convenience in installation and long service life.
Drawings
The utility model is further illustrated with reference to the following figures and examples.
Fig. 1 is a partial sectional view of a sealing apparatus for a booster pump of a nuclear power plant according to an embodiment of the present invention.
The reference numerals in the specification are as follows:
11. an outer sleeve; 12. an inner sleeve; 13. an elastic component; 131. a first elastic member; 132. an elastic loading seal ring; 133. a first guide post; 14. mounting blocks; 15. a heat dissipation wheel; 16. a static seal ring; 17. a movable sealing ring; 18. a second seal ring; 19. a first seal support; 21. a second seal support; 22. a fixing member; 23. the cavity is observed.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.
It is to be understood that the terms "upper", "lower", "left", "right", "front", "rear", "middle", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the present invention.
As shown in fig. 1, a sealing device for a booster pump of a nuclear power plant according to an embodiment of the present invention includes an outer sleeve 11, an inner sleeve 12, an elastic assembly 13, a mounting block 14, a heat dissipation wheel 15, a static sealing ring 16, and a dynamic sealing ring 17 mounted (by clamping, screwing, etc.) on the inner sleeve 12; the mounting block 14 is mounted (mounted by clamping, screwing and the like) on the outer sleeve 11 through the elastic component 13; the static sealing ring 16 is mounted (mounted by clamping, screw connection and the like) on the mounting block 14, and the dynamic sealing ring 17 is connected with the static sealing ring 16 in a sealing manner; it can be understood that the outer sleeve 11 is rotatably mounted on the inner sleeve 12, and the rotating shaft of the booster pump is in interference fit with the inner ring of the inner sleeve 12, further, in the process that the inner sleeve 12 drives the dynamic seal ring 17 to rotate, the static seal ring 16 and the outer sleeve 11 are kept in a static state. Specifically, be equipped with the annular groove on the movable seal ring 17, be equipped with annular bulge on the quiet sealing washer 16, quiet sealing washer 16 is through inserting annular groove annular bulge with movable seal ring 17 sealing connection, and movable seal ring 17 with be dynamic seal connection between the quiet sealing washer 16.
The heat dissipation wheel 15 is mounted (by welding, screwing, or the like) on the inner sleeve 12, and the heat dissipation wheel 15 is disposed opposite to the dynamic seal ring 17 and the static seal ring 16. It can be understood that the outer surface of the dynamic seal ring 17 and the outer surface of the static seal ring 16 are communicated with a sealing cavity of the booster pump, an observation cavity 23 is reserved between the inner surface of the dynamic seal ring 17 and the inner surface of the static seal ring 16 and the outer wall of the inner sleeve 12, the observation cavity 23 is communicated with the external environment, and the sealing performance of the sealing device of the booster pump of the nuclear power station can be known by observing the volume of the cooling water flowing out of the observation cavity 23. Further, the heat dissipation wheel 15 will rotate along with the inner sleeve 12, and the rotating heat dissipation wheel 15 will drive the cooling water on the dynamic seal ring 17 and the static seal ring 16 to circularly flow, so as to cool the dynamic seal ring 17 and the static seal ring 16.
In the present invention, the mounting block 14 is mounted on the outer sleeve 11 through the elastic assembly 13; the static sealing ring 16 is arranged on the mounting block 14, the dynamic sealing ring 17 is arranged on the inner sleeve 12, and the dynamic sealing ring 17 rotates and is connected with the static sealing ring 16 in a sealing manner; the heat dissipation wheel 15 is mounted on the inner sleeve 12, and the heat dissipation wheel 15 is disposed opposite to the dynamic seal ring 17 and the static seal ring 16. The elastic component 13 can adjust the pressing force between the outer sleeve 11 and the mounting block 14 in real time, and due to the relative rotation between the dynamic seal ring 17 and the static seal ring 16, the elastic component 13 can control the contact force between the seal ring 17 and the static seal ring 18 within a proper range through the mounting block, so that the phenomenon that the dynamic seal ring 17 and the static seal ring 18 have too high temperature rise due to too high contact force, and the sealing performance of the dynamic seal ring 17 and the static seal ring 18 fails is avoided. The dynamic seal 17 and the static seal 16 prevent water on the outer surface of the dynamic seal 17 and the static seal 18 from flowing into the gap between the outer sleeve 12 and the inner sleeve 11 during rotation of the inner sleeve 12 relative to the outer sleeve 11. In addition, in the process that the inner sleeve 12 drives the heat dissipation wheel 15 to rotate, the rotating heat dissipation wheel can drive the cooling water at the positions of the dynamic sealing ring 17 and the static sealing ring 16 to circularly flow at a high speed, so that the effect of cooling the dynamic sealing ring 17 and the static sealing ring 16 can be achieved, and the sealing function failure caused by overhigh temperature of the dynamic sealing ring 17 and the static sealing ring 16 is avoided. The sealing device for the booster pump of the nuclear power station has the advantages of high sealing performance, simple structure, convenience in installation and long service life.
In one embodiment, as shown in fig. 1, the elastic assembly 13 includes a first elastic member 131, a first guide post 133, and a spring-loaded sealing ring 132; the mounting block is mounted on the outer sleeve 11 through the first guide column 131; a first mounting groove and a second mounting groove which are distributed at intervals are formed between the mounting block 14 and the outer sleeve 11; the first elastic member 131 is installed in the first installation groove, the spring-loaded sealing ring 132 is installed in the second installation groove, and the installation block 14 is installed on the outer sleeve 11 through the first elastic member 131 and the spring-loaded sealing ring 132. Specifically, the first guiding column 133 is mounted on the mounting block 14, the outer sleeve 11 is provided with a guiding hole matched with the first guiding column, and the center line of the guiding hole is parallel to the center line of the inner sleeve 12, so that the mounting block 14 is mounted on the outer sleeve 11 through the first guiding column inserted into the guiding hole (i.e., the mounting block 14 is positioned and mounted on the outer sleeve 11 from the axial direction); and the number of the first elastic member 131 and the first guide post 133 can be designed according to actual requirements. It is understood that the first and second mounting grooves are spaced apart from each other in the radial direction of the inner sleeve 12 between the mounting block 14 and the inner sleeve 12, and the first elastic member 131 includes, but is not limited to, a coil spring, etc.
Further, the first elastic element 131 and the elastic loading seal ring 132 can adjust the contact force (the contact force along the axial direction) between the mounting block 14 and the outer sleeve 11 in real time, and the contact force is always maintained in a proper range, so that the phenomenon that the dynamic seal ring 17 and the static seal ring 16 are attached too tightly due to the fact that the axial force between the outer sleeve 11 and the mounting block 14 is too large, and further the sealing performance of the dynamic seal ring 17 and the static seal ring 16 is damaged due to too high temperature rise in the relative movement process is avoided. And the elastic loading sealing ring 132 can also play a role of sealing the second mounting groove, so that moisture on the outer surfaces of the dynamic sealing ring 17 and the static sealing ring 16 can be prevented from entering between the inner sleeve 12 and the outer sleeve 11 through the first mounting groove and the second mounting groove, and the sealing performance of the sealing device of the nuclear power station booster pump is further improved.
In one embodiment, as shown in fig. 1, the spring-loaded sealing ring 132 includes a first sealing ring (specifically, the first sealing ring is U-shaped) provided with an annular groove and a second elastic member, the first sealing ring is installed in the second installation groove, and the second elastic member is installed in the annular groove. It can be understood that, the first sealing ring includes but is not limited to an O-ring, and the second elastic member is installed in the annular groove inside the first sealing ring, and the second elastic member may apply an additional elastic force to the first sealing ring, so that the first sealing ring is attached to the second installation groove more tightly, and the sealing performance of the sealing device of the booster pump of the nuclear power plant is further improved.
In an embodiment, as shown in fig. 1, a wear-resistant layer is disposed on an inner wall of the second mounting groove, and the wear-resistant layer abuts against an outer wall of the first seal ring. Understandably, the outer sleeve 11 with the installation piece 14 with the position that the second mounting groove corresponds all is equipped with the wearing layer, just first sealing washer with second mounting groove interference fit, the frictional layer has improved the wearability of installation piece 14 has been avoided the installation piece 14 is too big because of wearing and tearing, and the problem that the sealing performance of elastic loading sealing washer 132 became invalid to this nuclear power station booster pump sealing device's sealing performance has been improved, its life has been prolonged.
In an embodiment, as shown in fig. 1, a sealing groove is formed on an inner wall of the inner sleeve 12, and the sealing device for the booster pump of the nuclear power plant further includes a second sealing ring 18 installed in the sealing groove. It can be understood that the second sealing ring 18 includes but is not limited to an O-ring, and the second sealing ring 18 is installed in the sealing groove in an interference manner, the inner sleeve 12 is connected to the rotating shaft of the booster pump in a sealing manner through the second sealing ring 18, and the second sealing ring 18 is disposed to prevent external moisture from entering the booster pump through the inner ring of the inner sleeve 12. In the utility model, the sealing performance of the sealing device of the booster pump of the nuclear power station is further improved by the design of the second sealing ring 18.
In one embodiment, as shown in fig. 1, the nuclear power plant booster pump sealing arrangement further comprises a first seal support 19; a first accommodating groove is formed in the inner sleeve 12, the first sealing support 19 is installed in the first accommodating groove, and the first sealing support 19 is connected with the dynamic sealing ring 17. It will be appreciated that the end of the dynamic seal ring 17 remote from the static seal ring 16 is connected to the inner ring by the first sealing support 19, the first sealing support 19 improving the sealing between the dynamic seal ring 17 and the inner sleeve 12.
In one embodiment, as shown in fig. 1, the sealing device for a nuclear power plant booster pump further comprises a second seal support 21; the outer sleeve 11 is provided with a second accommodating groove, the second sealing support 21 is installed in the second accommodating groove, and the second sealing support 21 is connected with the static sealing ring 16. It will be appreciated that the end of the static seal ring 16 remote from the dynamic seal ring 17 is connected to the mounting block 14 by the second seal support 21, the second seal support 21 improving the sealing between the static seal ring 16 and the mounting block 14.
In one embodiment, as shown in fig. 1, the sealing device of the booster pump of the nuclear power plant further includes a fixing member 22, and the static seal ring 16 is mounted on the mounting block 14 through the fixing member 22. It is understood that the fasteners 22 include, but are not limited to, screws, retaining pins, and the like. The static sealing ring 16 is fixed on the mounting block 14 through the fixing piece 22, so that the stability of the static sealing ring 16 mounted on the mounting block 14 is improved; and the length of the static sealing ring 16 is smaller, so that the deformation of the static sealing ring 16 is reduced, and the sealing performance of the sealing device of the booster pump of the nuclear power station is further improved.
In one embodiment, as shown in FIG. 1, a viewing cavity 23 is formed between the inner wall of the static seal ring 16, the dynamic seal ring 17, and the inner wall of the mounting block 14 and the outer wall of the inner sleeve 12, and is open to the environment. It can be understood that the static seal ring 16 is installed on the installation block 14 through the fixing member 22, and the inner wall of the static seal ring 16 is not in contact with the outer wall of the inner sleeve 12, and simultaneously the inner wall of the dynamic seal ring 17 is not in contact with the outer wall of the inner sleeve 12, so that the problem that the sealing performance of the sealing device of the booster pump of the nuclear power plant is reduced due to abrasion between the dynamic seal ring 17 and the static seal ring 16 and the inner sleeve 12 is avoided.
Further, observe cavity 23 and communicate external environment, through observe the water yield of revealing in the cavity 23, can observe the sealing performance of movable seal ring 17 with quiet sealing ring 16 (that is, this nuclear power station booster pump sealing device's sealing performance) to nuclear power station personnel's of being convenient for overhaul.
The utility model further provides a nuclear power station booster pump, which comprises a rotating shaft and the sealing device of the nuclear power station booster pump, wherein the rotating shaft is arranged in the inner sleeve 12. It will be appreciated that the spindle is interference mounted in the bore of the inner collar by the second seal ring 18. According to the utility model, the booster pump for the nuclear power station has good sealing performance.
The above description is only an example of the sealing device of the booster pump in the nuclear power plant, and should not be construed as limiting the present invention, and any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A nuclear power station booster pump sealing device is characterized by comprising an outer sleeve, an inner sleeve, an elastic component, a mounting block, a heat dissipation wheel, a static sealing ring and a dynamic sealing ring mounted on the inner sleeve; the mounting block is mounted on the outer sleeve through the elastic assembly; the static sealing ring is arranged on the mounting block, and the dynamic sealing ring is connected with the static sealing ring in a sealing manner;
the heat dissipation wheel is installed on the inner sleeve, and the heat dissipation wheel is arranged opposite to the dynamic sealing ring and the static sealing ring.
2. The nuclear power plant booster pump sealing arrangement of claim 1, wherein the resilient assembly comprises a first resilient member, a first guide post, and a spring-loaded seal ring; the mounting block is mounted on the outer sleeve through the first guide column; a first mounting groove and a second mounting groove which are distributed at intervals are formed between the mounting block and the outer sleeve; the first elastic piece is arranged in the first mounting groove, the elastic loading sealing ring is arranged in the second mounting groove, and the mounting block is arranged on the outer sleeve through the first elastic piece and the elastic loading sealing ring.
3. The nuclear power plant booster pump sealing arrangement of claim 2, wherein the spring-loaded sealing ring comprises a first sealing ring provided with an annular groove and a second resilient member, the first sealing ring being mounted in the second mounting groove, the second resilient member being mounted in the annular groove.
4. The nuclear power plant booster pump sealing device of claim 3, wherein a wear-resistant layer is arranged on the inner wall of the second mounting groove, and the wear-resistant layer is abutted against the outer wall of the first sealing ring.
5. The nuclear power plant booster pump sealing device of claim 1, wherein a sealing groove is formed in an inner wall of the inner sleeve, and the nuclear power plant booster pump sealing device further comprises a second sealing ring installed in the sealing groove.
6. The nuclear power plant booster pump seal arrangement of claim 1, further comprising a first seal support; the inner sleeve is provided with a first accommodating groove, the first sealing support piece is arranged in the first accommodating groove, and the first sealing support piece is connected with the dynamic sealing ring.
7. The nuclear power plant booster pump seal arrangement of claim 1, further comprising a second seal support; the outer sleeve is provided with a second accommodating groove, the second sealing support piece is installed in the second accommodating groove, and the second sealing support piece is connected with the static sealing ring.
8. The nuclear power plant booster pump sealing arrangement of claim 1, further comprising a fixture, the static seal ring being mounted on the mounting block by the fixture.
9. The nuclear power plant booster pump sealing device of claim 1, wherein an observation cavity is formed between the inner wall of the static sealing ring, the inner wall of the dynamic sealing ring and the mounting block and the outer wall of the inner sleeve, and the observation cavity is communicated with the external environment.
10. A booster pump for nuclear power plants, comprising a rotary shaft and a sealing arrangement for a booster pump for nuclear power plants according to any one of claims 1 to 9, the rotary shaft being mounted in the inner sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120820308.6U CN216077704U (en) | 2021-04-20 | 2021-04-20 | Nuclear power station booster pump sealing device and nuclear power station booster pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120820308.6U CN216077704U (en) | 2021-04-20 | 2021-04-20 | Nuclear power station booster pump sealing device and nuclear power station booster pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216077704U true CN216077704U (en) | 2022-03-18 |
Family
ID=80634035
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120820308.6U Active CN216077704U (en) | 2021-04-20 | 2021-04-20 | Nuclear power station booster pump sealing device and nuclear power station booster pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216077704U (en) |
-
2021
- 2021-04-20 CN CN202120820308.6U patent/CN216077704U/en active Active
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