CN103742440B - A kind of pyromagnetic sliding sleeve parking sealing arrangement of core main pump - Google Patents
A kind of pyromagnetic sliding sleeve parking sealing arrangement of core main pump Download PDFInfo
- Publication number
- CN103742440B CN103742440B CN201410022964.6A CN201410022964A CN103742440B CN 103742440 B CN103742440 B CN 103742440B CN 201410022964 A CN201410022964 A CN 201410022964A CN 103742440 B CN103742440 B CN 103742440B
- Authority
- CN
- China
- Prior art keywords
- sliding sleeve
- pedestal
- seal ring
- spring
- core main
- 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.)
- Expired - Fee Related
Links
- 238000007789 sealing Methods 0.000 title claims abstract description 14
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims abstract description 44
- 239000012530 fluid Substances 0.000 claims abstract description 16
- 239000000696 magnetic material Substances 0.000 claims abstract description 8
- 239000007769 metal material Substances 0.000 claims abstract description 5
- 238000004519 manufacturing process Methods 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 4
- 230000006835 compression Effects 0.000 claims description 2
- 238000007906 compression Methods 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 2
- 230000005389 magnetism Effects 0.000 abstract description 2
- 230000002265 prevention Effects 0.000 abstract description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 230000002285 radioactive effect Effects 0.000 description 3
- 239000007789 gas Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
Landscapes
- Details Of Reciprocating Pumps (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
A kind of pyromagnetic sliding sleeve parking sealing arrangement of core main pump, comprise sliding sleeve pedestal and sliding sleeve, sliding sleeve pedestal is connected with axle interference, sliding sleeve is connected with shaft clearance, sliding sleeve is enclosed within sliding sleeve base interior, sliding sleeve is provided with the first seal ring, second seal ring and the 3rd seal ring, sliding sleeve adopts metallic material, sliding sleeve pedestal adopts magnetic material manufacture, the spring chamber of two place's symmetries is provided with in sliding sleeve, spring is provided with in spring chamber, sliding sleeve pedestal is provided with aperture, sliding sleeve pedestal and sliding sleeve attracting, to spring-compressed, sliding sleeve seals aperture simultaneously, when core main pump primary seal lost efficacy, high-temperature technology fluid makes sliding sleeve pedestal lose magnetism, magnetic force between sliding sleeve and sliding sleeve pedestal disappears, under sliding over the effect of high temperature fluid pressure in spring force and pump chamber, move until sliding sleeve is pressed on pump chamber wall to primary seal side, high-temperature technology fluid in prevention pump chamber is to external leakage, the present invention is without the need to external air source, there is non-dynamic role.
Description
Technical field
The invention belongs to core main pump technical field, be specifically related to a kind of pyromagnetic sliding sleeve parking sealing arrangement of core main pump.
Background technique
Under serious accident, in order to ensure that the radioactive fluid of reacting core main pump is not leaked, core main pump needs to configure parking sealer.Existing core main pump parking sealer has a kind of high pressure nitrogen that adopts to drive, and pressurized gas produce pressure to packed-piston, and promote packed-piston and move toward multidiameter shaft, and be pressed on multidiameter shaft, the seal ring on surface of contact realizes the sealing to radioactive fluid.Also reliable hot fluid drives the device having melted metal, and the hot-fluid scale of construction that this device needs is larger, therefore, needs certain leakage occurs.
Prior art and design to obtain deficiency: core main pump parking sealing arrangement do not possess non-can dynamic response, dependence is had to outside high pressure nitrogen source of the gas, reliability is inadequate, if lose high-pressure air source under serious accident simultaneously, then parking sealer cannot action, sealing function lost efficacy, and radioactive fluid is leaked in a large number.Adopt the mode of hot fluid melt low melting metal, the leakage rate of generation is larger.
Summary of the invention
In order to overcome the shortcoming of above-mentioned prior art, the object of the present invention is to provide a kind of pyromagnetic sliding sleeve parking sealing arrangement of core main pump, changing the driving mode of parking sealer work, without the need to external air source, there is non-dynamic role.
In order to achieve the above object, the technological scheme that the present invention takes is:
A kind of pyromagnetic sliding sleeve parking sealing arrangement of core main pump, comprise sliding sleeve pedestal 1 and sliding sleeve 2, sliding sleeve pedestal 1 is connected with axle I interference, sliding sleeve 2 and axle I recessed bond ing, it is inner that sliding sleeve 2 is enclosed within sliding sleeve pedestal 1, and sliding sleeve 2 is provided with the first seal ring 3, second seal ring 5 and the 3rd seal ring 6, first seal ring 3 is arranged in sliding sleeve 2 plane relative with pump chamber wall II, second seal ring 5 and the 3rd seal ring 6 are arranged on the curved surface that sliding sleeve 2 contacts with rotating shaft I respectively
Sliding sleeve 2 adopts metallic material;
Sliding sleeve pedestal 1 adopts magnetic material manufacture, and the Curie temperature of this kind of magnetic material is lower than the temperature of process fluid in the pump housing;
Be provided with the spring chamber D of two place's symmetries in sliding sleeve 2, be provided with spring 4 in spring chamber D, sliding sleeve pedestal 1 is provided with aperture E, and sliding sleeve pedestal 1 is attracting with sliding sleeve 2, compresses spring 4, and sliding sleeve 2 seals aperture E simultaneously.
The sidepiece of described sliding sleeve 2 is provided with symmetrical chute G, and sliding sleeve pedestal 1 is provided with the boss of formed objects on relevant position, and boss is embedded on chute G, realizes the mutual location between sliding sleeve 2 and sliding sleeve pedestal 1.
Beneficial effect of the present invention: the driving mode changing parking sealer work, without the need to external air source, has non-dynamic role.
Accompanying drawing explanation
Fig. 1 is the present invention's positive sectional structure chart in normal operation.
Fig. 2 is the present invention's positive sectional structure chart in case of a fault.
Fig. 3 is sliding sleeve side view.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further illustrated.
See figures.1.and.2, a kind of pyromagnetic sliding sleeve parking sealing arrangement of core main pump, comprise sliding sleeve pedestal 1 and sliding sleeve 2, sliding sleeve pedestal 1 is connected with axle I interference, sliding sleeve 2 and axle I recessed bond ing, and it is inner that sliding sleeve 2 is enclosed within sliding sleeve pedestal 1, sliding sleeve 2 is provided with the first seal ring 3, second seal ring 5 and the 3rd seal ring 6, first seal ring 3 is arranged in sliding sleeve 2 plane relative with pump chamber wall II, and the second seal ring 5 and the 3rd seal ring 6 are arranged on the curved surface that sliding sleeve 2 contacts with rotating shaft I respectively
Sliding sleeve 2 adopts metallic material;
Sliding sleeve pedestal 1 adopts magnetic material manufacture, and the Curie temperature of this kind of magnetic material is lower than the temperature of process fluid in the pump housing;
Be provided with the spring chamber D of two place's symmetries in sliding sleeve 2, be provided with spring 4 in spring chamber D, sliding sleeve pedestal 1 is provided with aperture E, and sliding sleeve pedestal 1 is attracting with sliding sleeve 2, compresses spring 4, and sliding sleeve 2 seals aperture E simultaneously.
With reference to Fig. 3, the sidepiece of described sliding sleeve 2 is provided with symmetrical chute G, and sliding sleeve pedestal 1 is provided with the boss of formed objects on relevant position, and boss is embedded on chute G, realizes the mutual location between sliding sleeve 2 and sliding sleeve pedestal 1.
Working principle of the present invention is:
When core main pump primary seal is normally run, clean low temperature seal medium flows by primary seal A side direction pump chamber B, sliding sleeve pedestal 1 possesses magnetic at low temperature, because sliding sleeve 2 is metallic material, sliding sleeve pedestal 1 and sliding sleeve 2 attract each other, and the spring 4 in spring chamber D is compressed, but now compressive force is less than magnetic force, first seal ring 3 at the sealing C place between sliding sleeve 2 and pump chamber wall II is open mode, and clean low temperature seal medium flows in pump chamber;
When core main pump primary seal lost efficacy, originally stopped supply from primary seal A effluent to the cryogen in pump chamber B, the high-temperature technology fluid in pump chamber then moves to primary seal effluent back through sealing C place.High-temperature technology fluid temperature (F.T.) is higher than the Curie temperature of the magnetic material of sliding sleeve pedestal 1, and sliding sleeve pedestal 1 loses magnetism, and sliding sleeve 2 disappears with the magnetic force of sliding sleeve pedestal 1.Sliding sleeve 2, by under the effect of the spring force of spring 4 by compression, moves to primary seal A side, and high-temperature technology fluid is flowed in the cavity between sliding sleeve pedestal 1 and sliding sleeve 2 by the aperture E of sliding sleeve pedestal 1 simultaneously.Because the pressure in the pressure ratio pump chamber B of primary seal A side is much smaller, therefore, sliding sleeve 2 is subject to the pressure to primary seal A side, and sliding sleeve 2 moves to primary seal side A further at this pressure, until sliding sleeve 2 contacts with pump chamber wall II, and is pressed on pump chamber wall II.First seal ring 3 now seals, and the high-temperature technology fluid in prevention pump chamber B is to external leakage.
Claims (2)
1. the pyromagnetic sliding sleeve parking sealing arrangement of a core main pump, comprise sliding sleeve pedestal (1) and sliding sleeve (2), it is characterized in that: sliding sleeve pedestal (1) is connected with axle (I) interference, sliding sleeve (2) and axle (I) recessed bond ing, it is inner that sliding sleeve (2) is enclosed within sliding sleeve pedestal (1), sliding sleeve (2) is provided with the first seal ring (3), second seal ring (5) and the 3rd seal ring (6), first seal ring (3) is arranged in sliding sleeve (2) plane relative with pump chamber wall (II), second seal ring (5) and the 3rd seal ring (6) are arranged on the curved surface that sliding sleeve (2) contacts with rotating shaft (I) respectively,
Sliding sleeve (2) adopts metallic material;
Sliding sleeve pedestal (1) adopts magnetic material manufacture, and the Curie temperature of this kind of magnetic material is lower than the temperature of process fluid in the pump housing;
The spring chamber (D) of two place's symmetries is provided with in sliding sleeve (2), spring (4) is provided with in spring chamber (D), sliding sleeve pedestal (1) is provided with aperture (E), sliding sleeve pedestal (1) is attracting with sliding sleeve (2), to spring (4) compression, sliding sleeve (2) seals aperture (E) simultaneously.
2. the pyromagnetic sliding sleeve parking sealing arrangement of a kind of core main pump according to claim 1, it is characterized in that: the sidepiece of described sliding sleeve (2) is provided with symmetrical chute (G), sliding sleeve pedestal (1) is provided with the boss of formed objects on relevant position, boss is embedded on chute (G), realizes the mutual location between sliding sleeve (2) and sliding sleeve pedestal (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410022964.6A CN103742440B (en) | 2014-01-17 | 2014-01-17 | A kind of pyromagnetic sliding sleeve parking sealing arrangement of core main pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410022964.6A CN103742440B (en) | 2014-01-17 | 2014-01-17 | A kind of pyromagnetic sliding sleeve parking sealing arrangement of core main pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103742440A CN103742440A (en) | 2014-04-23 |
| CN103742440B true CN103742440B (en) | 2015-12-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410022964.6A Expired - Fee Related CN103742440B (en) | 2014-01-17 | 2014-01-17 | A kind of pyromagnetic sliding sleeve parking sealing arrangement of core main pump |
Country Status (1)
| Country | Link |
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| CN (1) | CN103742440B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105673552B (en) * | 2016-01-25 | 2017-12-22 | 李晓燕 | A kind of nuclear power main pump parking sealing arrangement |
| CN109519411A (en) * | 2018-12-29 | 2019-03-26 | 沈阳创星泵业有限公司 | One kind is exempted to change mechanical seal structure |
| CN112178200B (en) * | 2020-09-27 | 2021-09-24 | 清华大学 | Magnetic liquid sealing device |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| GB2363864B (en) * | 2000-06-23 | 2004-08-18 | Rolls Royce Plc | A control arrangement |
| JP2007162493A (en) * | 2005-12-09 | 2007-06-28 | Ntn Corp | Compression expansion turbine system |
| CN201149093Y (en) * | 2007-12-25 | 2008-11-12 | 丹东克隆集团有限责任公司 | Combined magnetic force mechanical sealing device |
| CN102086799B (en) * | 2009-12-08 | 2012-09-19 | 华纳圣龙（宁波）有限公司 | Electronic cooling water pump of variable-flow engine |
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2014
- 2014-01-17 CN CN201410022964.6A patent/CN103742440B/en not_active Expired - Fee Related
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| CN103742440A (en) | 2014-04-23 |
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Granted publication date: 20151230 Termination date: 20190117 |