CN103321949B - Reactor coolant pump hydrodynamic mechanical seal ring friction pair - Google Patents
Reactor coolant pump hydrodynamic mechanical seal ring friction pair Download PDFInfo
- Publication number
- CN103321949B CN103321949B CN201310284490.8A CN201310284490A CN103321949B CN 103321949 B CN103321949 B CN 103321949B CN 201310284490 A CN201310284490 A CN 201310284490A CN 103321949 B CN103321949 B CN 103321949B
- Authority
- CN
- China
- Prior art keywords
- ring
- rotating
- stationary
- rotating ring
- slip
- 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.)
- Active
Links
Landscapes
- Mechanical Sealing (AREA)
Abstract
The present invention relates to a kind of reactor coolant pump hydrodynamic mechanical seal ring friction pair, middle stationary ring slip ring (1) constitutes the stationary part stationary ring of sealing pair together with stationary ring shrink ring (2) hot charging, rotating ring tightens outer shroud (3), rotating ring slip ring (4) and rotating ring and tightens internal ring (5) and constitute the rotating part rotating ring of sealing pair through hot charging together, wherein rotating ring tightens outer shroud (3) and is sleeved on rotating ring slip ring (4), and rotating ring tightens the lateral surface of internal ring (5) and the medial surface of rotating ring slip ring (4) for closely cooperating.Nine special dynamic pressures gradual change arc-shaped shallow slot (7) are had equably on the seal face (6) of stationary ring slip ring (1), the seal face of rotating ring slip ring (4) is high precision plane, stationary ring slip ring (1) is made up of hard alloy, rotating ring slip ring (4) uses graphite to make, and sealing ring friction pair end face is all made through fine grinding.The present invention has high flatness and roughness, it is ensured that is sealed in when small-gap suture runs and is in fluid sliding mode, it is ensured that the service life of sealing.
Description
Technical field: the present invention relates to the friction of reactor coolant pump hydrodynamic mechanical seal ring
Secondary.
Background technology: shaft seal pump is widely used in the main coolant pump of pressurized-water reactor nuclear power plant all over the world.
Reactor coolant pump is unique slewing in one loop of nuclear power station system, cools down at reactor
In agent pump, sealing is the important rotating seal member that reactor coolant is isolated from the outside, abroad
Last sect in the block of core main pump art.By some grades of main shaft seals can by high temperature,
High pressure, active reactor medium is carried to keep apart with the external world.Service life of main shaft seal,
Reliability is most important to the safe and stable operation of nuclear power station.Currently used sealing can be divided into
Hydrostatic pressure seals and the big class of hydrodynamic seal two.Due to hydrodynamic mechanical seal service life
Factory, reliable, therefore hydrodynamic mechanical seal increasingly obtains tremendous development.
From the nineties in last century, enterprise, institute or the height with former Shenyang Water Pump Factory as representative
Mapping, imitated, design studies reactor coolant pump sealing are set about in school.Have Austrian ANDRITZ,
The reactor coolant pump dynamic pressure type sealing pattern of the companies such as Germany KSB, has U.S. EMD, day
The reactor coolant pump hydrostatic profile sealing of the companies such as this MHI.Through 10 years of researches and pass
Capturing of key technology, achieves abundant in fields such as raw material, structure, manufacture and method of testings
Achievement, but be the most truly used in reactor coolant pump project.
In Hydrodynamic pressure type mechanical seal, friction pair shape and the manufacturing technology of sealing ring is particularly critical, it
Determine sealing can reliably, the long-life run.
Summary of the invention: it is an object of the invention to provide high anti-of length in a kind of service life, reliability
Answer reactor coolant pump hydrodynamic mechanical seal ring friction pair.Technical scheme
For: a kind of reactor coolant pump hydrodynamic mechanical seal ring friction pair, stationary ring slide
Rotating ring (1), stationary ring shrink ring (2), rotating ring tighten outer shroud (3), rotating ring slip ring (4)
Internal ring (5) composition, wherein stationary ring slip ring (1) and stationary ring shrink ring (2) is tightened with rotating ring
Hot charging constitutes the stationary part stationary ring of sealing pair together, and rotating ring tightens outer shroud (3), rotating ring
Slip ring (4) and rotating ring tighten internal ring (5) and constitute the rotation of sealing pair through hot charging together
Part rotating ring, wherein rotating ring tightens outer shroud (3) and is sleeved on rotating ring slip ring (4), rotating ring
Tighten the lateral surface of internal ring (5) and the medial surface of rotating ring slip ring (4) for closely cooperating, quiet
Nine special dynamic pressure gradual change arcs are had equably on the seal face (6) of ring slip ring (1)
Shape shallow slot (7), the seal face of rotating ring slip ring (4) is high precision plane, and stationary ring slides
Ring (1) is made up of hard alloy, and rotating ring slip ring (4) uses graphite to make, and sealing ring rubs
Wipe secondary end face all to make through fine grinding.
Operation principle and the technological merit of the present invention be:
1. being sealed under work operating mode, the inner circle side (low-pressure area) sealed in Fig. 1 is (high with cylindrical side
Nip) pressure reduction is 5MPa, special operation condition is issued to 15MPa.When movable ring part is for rotating
Time with static components geo-stationary, moving ring assembly and static components outer portion spring force are close to
Together, prevent medium from flowing from higher-pressure region toward low-pressure area.Move after moving ring assembly rotates
Ring assemblies and static components have relative motion, and medium is followed rotating ring and flowed therewith, this
There is high-precision special gradual change arc shallow on Shi Jinghuan slip ring (1) seal face (6)
Groove (7) (Fig. 2) interior dielectric, according to hydrodynamic principle, liquid is at gradual change arc
The melange effects such as interior centrifugal, the backflow that liquid occurs of shallow slot, separate rotating ring with stationary ring.
Seal liquid film stiffness to increase rapidly along with the reduction sealing running clearance when small-gap suture
Greatly, it is ensured that seal and there is enough opening forces and be unlikely to produce dry friction, and then ensure
The service life sealed.
2., when running clearance exceedes certain limit, special gradual change arc-shaped shallow slot (7) can make sealing
Liquid film stiffness reduces with the increase of running clearance, it is ensured that with system pressure, spring force etc.
Make the balance between other power that rush sealing surface closes, thus control seal clearance enter one
Step expands, and then controls sealing leak amount.
3. under high voltage startup operating mode, by the special gradual change arc of stationary ring slip ring (1) seal face
Shape shallow slot (7) and the cooperation of attached other static seal ring recess size of stationary ring, can reduce
Axial load during stationary ring static, thus improve performance when being sealed in start and stop, it is to avoid
The abrasion during start-stop of sealing pair, and then improve the service life sealed.
4. the sealing surface of stationary ring slip ring (1) and rotating ring slip ring (4) is through milled processed, tool
There are high flatness and roughness, it is ensured that be in fluid when being sealed in small-gap suture operation sliding
Dynamic state, it is ensured that the service life of sealing.
5., by stationary ring slip ring (1) and rotating ring slip ring (4), stationary ring shrink ring (2), move
Ring tightens outer shroud (3), rotating ring tightens internal ring (5) can increase the rigidity of sealing pair, subtracts
The injurious deformation that the radial force that little sealing pair produces because of system pressure difference causes.
6. grinding is all passed through at sliding surface and the back side of sealing pair, has the highest flatness with parallel
Degree, can make sealing pair be fitted in admirably in rigidity preferable secondary sealant support ring,
Thus reduce issuable injurious deformation when sealing pair runs further.
Accompanying drawing illustrates:
Fig. 1 is sealing pair sectional view
Fig. 2 is stationary ring sliding surface view
Fig. 3 is stationary ring fluting schematic diagram
Fig. 4 is stationary ring slip ring grooved tables of data
Detailed description of the invention:
A kind of reactor coolant pump hydrodynamic mechanical seal ring friction as shown in Figure 1
Pair, is tightened outer shroud 3, rotating ring slip ring 4 by stationary ring slip ring 1, stationary ring shrink ring 2, rotating ring
Tighten internal ring 5 with rotating ring to form, as in figure 2 it is shown, wherein stationary ring slip ring 1 and stationary ring shrink ring
2 hot chargings constitute the stationary part stationary ring of sealing pair together, and rotating ring tightens outer shroud 3, rotating ring is slided
Rotating ring 4 tighten with rotating ring internal ring 5 through hot charging together with constitute the rotating part rotating ring of sealing pair,
Wherein rotating ring tightens outer shroud 3 and is sleeved on rotating ring slip ring 4, and rotating ring tightens the lateral surface of internal ring 5
With the medial surface of rotating ring slip ring 4 for closely cooperating.As shown in Figure 4, stationary ring slip ring 1 is close
Having nine special dynamic pressure gradual change arc-shaped shallow slots 7 on end-blocking face 6 equably, its shape is groove depth
The deepest 0.012mm of h, the minimum 0.0764 ° of arcuately gradual change of taper theta minimum.Rotating ring slip ring 4
Seal face be high precision plane, stationary ring slip ring 1 is made up of hard alloy, rotating ring slip ring
4 use graphite to make, and sealing ring friction pair end face is all made through fine grinding.
Claims (1)
1. a reactor coolant pump hydrodynamic mechanical seal ring friction pair, it is special
Levy and be: by stationary ring slip ring (1), stationary ring shrink ring (2), rotating ring tighten outer shroud (3),
Rotating ring slip ring (4) and rotating ring tighten internal ring (5) composition, wherein stationary ring slip ring (1)
The stationary part stationary ring of sealing pair, rotating ring is constituted together with stationary ring shrink ring (2) hot charging
Tighten outer shroud (3), rotating ring slip ring (4) and rotating ring to tighten internal ring (5) and exist through hot charging
Constituting the rotating part rotating ring of sealing pair together, wherein rotating ring tightens outer shroud (3) and is sleeved on dynamic
On ring slip ring (4), rotating ring tightens lateral surface and the rotating ring slip ring (4) of internal ring (5)
Medial surface for closely cooperating, on the seal face (6) of stationary ring slip ring (1) equably
Having nine dynamic pressures gradual change arc-shaped shallow slot (7), the seal face of rotating ring slip ring (4) is high
Precision face, stationary ring slip ring (1) is made up of hard alloy, and rotating ring slip ring (4) is adopted
Making with graphite, sealing ring friction pair end face is all made through fine grinding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310284490.8A CN103321949B (en) | 2013-07-09 | 2013-07-09 | Reactor coolant pump hydrodynamic mechanical seal ring friction pair |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310284490.8A CN103321949B (en) | 2013-07-09 | 2013-07-09 | Reactor coolant pump hydrodynamic mechanical seal ring friction pair |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103321949A CN103321949A (en) | 2013-09-25 |
| CN103321949B true CN103321949B (en) | 2016-08-10 |
Family
ID=49190914
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310284490.8A Active CN103321949B (en) | 2013-07-09 | 2013-07-09 | Reactor coolant pump hydrodynamic mechanical seal ring friction pair |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103321949B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105952899B (en) * | 2016-06-29 | 2018-08-28 | 上海电气凯士比核电泵阀有限公司 | Hydrodynamic pressure type mechanical sealing surface structure |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1074514A (en) * | 1992-11-13 | 1993-07-21 | 胜利石油管理局胜利采油厂 | Small discharge and high lift ground centrifugal pump |
| JPH07243536A (en) * | 1994-03-03 | 1995-09-19 | Hitachi Ltd | Floating ring seal |
| CN2830730Y (en) * | 2005-04-15 | 2006-10-25 | 江苏双达泵阀集团有限公司 | Fluid hydrodynamic mechanical seal |
| CN101825178A (en) * | 2010-03-26 | 2010-09-08 | 丹东克隆集团有限责任公司 | Lubricating mechanical sealing end surface for counter-current dynamical pressure groove |
| CN102032348A (en) * | 2010-12-10 | 2011-04-27 | 清华大学 | Mechanical seal ring with magnetic ring |
| CN102278482A (en) * | 2011-06-23 | 2011-12-14 | 北京化工大学 | Mechanical seal device with stress self adaption |
| CN102537360B (en) * | 2012-01-20 | 2015-02-04 | 重庆杜克高压密封件有限公司 | Assembled half-exposed framework high-pressure seal ring |
| CN102528613B (en) * | 2012-02-29 | 2013-10-16 | 大连理工大学 | Machining method for complex surface of fluid dynamic pressure and static pressure combined mechanical seal ring for nuclear main pump |
| CN203394842U (en) * | 2013-07-09 | 2014-01-15 | 哈尔滨电气动力装备有限公司 | Sealing ring friction pair for hydrodynamic mechanical seal of reactor coolant pump |
-
2013
- 2013-07-09 CN CN201310284490.8A patent/CN103321949B/en active Active
Non-Patent Citations (2)
| Title |
|---|
| 核电站一回路用机械密封;王玉明，黄伟峰，李永健;《摩擦学学报》;20110731;第31卷(第4期);第408-415页 * |
| 王玉明，黄伟峰，李永健.核电站一回路用机械密封.《摩擦学学报》.2011,第31卷(第4期), * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103321949A (en) | 2013-09-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11603934B2 (en) | Sliding component | |
| CN105114353B (en) | A kind of oxyhydrogen engine turbine pump Rayleigh slot type floating ring seal arrangement | |
| CN101576121B (en) | Static-dynamic mixed oil film bearing | |
| CN201891839U (en) | Dry gas sealing friction pair | |
| JPH05505721A (en) | small disc drive motor | |
| JPWO2013176009A1 (en) | Sliding parts | |
| EP3299643B1 (en) | Mixed-type dynamic pressure gas radial bearing | |
| JP6138132B2 (en) | Sliding parts | |
| KR20210121229A (en) | sliding parts | |
| US20180355879A1 (en) | Self-adjusting drum system | |
| CN201851656U (en) | Hydrostatic and hydrodynamic combined mechanical sealing structure | |
| US4095806A (en) | Seal arrangement | |
| CN107218396A (en) | A kind of end face carries the mechanical seal structure of vein shape shape groove | |
| CN106439036A (en) | Fluid dynamic pressure type mechanical sealing structure | |
| JPWO2014038080A1 (en) | Thrust bearing device and rotating machine using the same | |
| CN101985981A (en) | Dynamic and static pressure integrated mechanical sealing structure with inclined straight line slots of nucleus main pump | |
| CN103321949B (en) | Reactor coolant pump hydrodynamic mechanical seal ring friction pair | |
| CN205446711U (en) | Mechanical seal device | |
| CN203394842U (en) | Sealing ring friction pair for hydrodynamic mechanical seal of reactor coolant pump | |
| CN205001248U (en) | Oxyhydrogen turbine of engine is unsteady ring sealing device of rayleigh slot type for pump | |
| CN203702642U (en) | Low-temperature large-shaft-diameter dry gas sealing device for centrifugal compressor | |
| CN109578433B (en) | High-reliability closed type spool type dynamic pressure bearing | |
| CN202188125U (en) | Spherical mechanical sealing device | |
| US3275330A (en) | High pressure shaft seal and method of sealing a rotating shaft using proportioned sealing rings | |
| CN110513324A (en) | Reactor coolant pump Hydrostatic die mould mechanical seal |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |