CN106969148A - It is a kind of to be pumped into formula Spiral Groove Dry Gas Seals by Use structure with convergence type seal clearance - Google Patents
It is a kind of to be pumped into formula Spiral Groove Dry Gas Seals by Use structure with convergence type seal clearance Download PDFInfo
- Publication number
- CN106969148A CN106969148A CN201710216166.0A CN201710216166A CN106969148A CN 106969148 A CN106969148 A CN 106969148A CN 201710216166 A CN201710216166 A CN 201710216166A CN 106969148 A CN106969148 A CN 106969148A
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- seal clearance
- dry gas
- spiral groove
- convergence type
- pumped
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- 238000007789 sealing Methods 0.000 claims abstract description 47
- 230000007704 transition Effects 0.000 claims abstract description 34
- 230000002706 hydrostatic effect Effects 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/40—Sealings between relatively-moving surfaces by means of fluid
- F16J15/406—Sealings between relatively-moving surfaces by means of fluid by at least one pump
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mechanical Sealing (AREA)
Abstract
With convergence type seal clearance formula Spiral Groove Dry Gas Seals by Use structure, including two sealing rings are pumped into the present invention relates to a kind of, any one sealing ring end face outside diameter is circumferentially equably provided with multiple helicla flutes wherein, and gas flows radially from outside diameter to internal diameter side；A transition face is machined with by the position of inner radius in any one sealing ring end face, flow direction of the seal clearance of two sealing interannulars along gas is formed convergence type seal clearance.The present invention is by the parameter in reasonable design transition face, and the hydrostatic effects that the dynamic pressure effect produced using helicla flute and convergence gap are produced improve and sealedly open ability.Meanwhile, seal clearance is designed to that convergence type can reduce sealed slip to a certain extent, sealing property is further improved.
Description
Technical field
With convergence type seal clearance formula Spiral Groove Dry Gas Seals by Use structure is pumped into the present invention relates to a kind of, belongs to machinery close
Encapsulation technique field.
Background technology
Dry gas seals are to prevent what sealed medium was leaked by the air film of one layer of micron order thickness in seal clearance.Cause
The shape of this air film is to influence the key factor of sealing property.The end face structure of seal ring of dry gas is improved, is current lifting dry gas
The conventional means of sealing property and extension sealing service life.At present, the improvement on Spiral Groove Dry Gas Seals by Use is typically implemented in
In terms of the structure type or groove distribution form of groove, the improvement for sealing ring end face is also seldom, although existing scholar is proposed in spiral shell
Spin slot Dry Gas Seal processes the conical surface（CN 103090006B）, but the case is applied to high pressure, high-speed working condition, while institute's structure
Into seal clearance be divergent gap.
Conventional Spiral Groove Dry Gas Seals by Use belongs to dynamic pressure type dry gas seals, and the air film in its seal clearance is parallel air film,
The dynamic pressure effect that can be produced using gas in dynamic pressure groove realizes the unlatching of dry gas seals, with high opening force, high rigidity etc.
Feature, typically applies in high-speed rotating machine.In the relatively low rotating machinery of the rotating speeds such as Ordinary Centrifugal Pumps, reactor, dynamic pressure
The stability and reliability of type dry gas seals can not obtain the guarantee of satisfaction, and suitable for the hydrostatic profile dry gas seals of speed operation
Although having larger opening force in start and stop, for dynamic pressure type dry gas seals, hydrostatic profile dry gas seals have knot
Structure is lengthy and jumbled, slip is high, influence its sealing property external factor it is more the shortcomings of.Therefore how in speed operation effectively
It is urgent problem to be solved while can guarantee that the stability of dry gas seals operation using dynamic pressure type dry gas seals.
The content of the invention
With convergence type seal clearance formula Spiral Groove Dry Gas Seals by Use structure is pumped into it is an object of the invention to provide a kind of,
With reference to dynamic pressure type and hydrnstaticiaxis seal technology, by being improved to the end face in sealing ring by inner radius, by helicla flute dry gas
Seal clearance becomes convergent gap by common parallel clearance, and Spiral Groove Dry Gas Seals by Use structure can be realized in speed operation
Application, make Spiral Groove Dry Gas Seals by Use structure operationally while having dynamic pressure effect and hydrostatic effects, so as to improve opening force,
Reduce slip.
The technical scheme is that：
It is a kind of to be pumped into formula Spiral Groove Dry Gas Seals by Use structure, including two sealing rings, the i.e. He of rotating ring 1 with convergence type seal clearance
Stationary ring 3, any one sealing ring end face outside diameter is circumferential wherein is equably provided with 4 ~ 40 helicla flutes 8, and groove depth is 3 ~ 100 μ
M, helical angle is 1 ° ~ 90 °, and gas flows radially from outside diameter to internal diameter side；Inner radius is leaned in any one sealing ring end face
Position be machined with a transition face 6, making flow direction of the seal clearances along gas of two sealing interannulars, to form convergence type close
Gap 2 is sealed, the form of transition face 6 can be the non-planar forms such as the conical surface, sphere, ellipsoid or other curved surfaces；
Convergence type seal clearance 2 is mainly determined by three key parameters：The section start of transition face 6 is to the sealing ring end face center of circle
Distancer 1 ；Angle between the axis plane projection profile and axis of transition face 6θ；Between seals dam area I 5 and seals dam area II 7
Axial difference in heighth s（Sealing ring end face unslotted region is divided into three parts by transition face 6：Seals dam area I 5 --- it is i.e. close
Seals dam area, transition face 6 and the seals dam area II 7 of external diameter --- i.e. close to the seals dam area of internal diameter）.
The section start of transition face 6 to the sealing ring end face center of circle distancer 1 For sealing ring internal diameterr i 1.01 ~ 1.18 times；Transition
Angle between the axis plane projection profile and axis in face 6θFor 0 ° ~ 80 °；Axial direction between seals dam area I 5 and seals dam area II 7
Difference in heighth sThickness is balanced for Spiral Groove Dry Gas Seals by Useh 00.1 ~ 0.9 times.
Beneficial effects of the present invention：
The present invention processes the class ledge structure with non-planar form in sealing ring end face by inner radius, makes seal clearance in gas
Flow direction on be in convergence type, can improve opening force, reduce slip.Using external diameter as 77.78mm, internal diameter is 58.42mm,
Groove root radius is 69mm, and rotating speed is 1087.08rad/s, and inlet pressure is 5MPa, and outlet pressure is 0.1013MPa, balances thickness
For 5.08 μm, groove depth is pumped into formula Spiral Groove Dry Gas Seals by Use structure as comparison other for 5 μm of parallel clearance, chooses transition face and rises
To the distance=1.1 × sealing ring internal diameter in the sealing ring end face center of circle at beginning, the axial difference in height between Liang Ba areash sFor 0.6h 0, mistake
The angle crossed between face axis plane projection profile and axisθFor 80 ° of being pumped into convergence type seal clearance of the present invention
Formula Spiral Groove Dry Gas Seals by Use structure is made comparisons, as a result to be of the present invention to be pumped into formula spiral with convergence type seal clearance
Groove dry gas sealing structure opening force can lift 18.404%, and slip can reduce by 85.955%.
Brief description of the drawings
Fig. 1 is described in embodiment 1 there is convergence type seal clearance to be pumped into formula Spiral Groove Dry Gas Seals by Use structural representation；
Fig. 2 is Figure 1A-A profiles；
Fig. 3 is described in embodiment 2 there is convergence type seal clearance to be pumped into formula Spiral Groove Dry Gas Seals by Use structural representation；
Fig. 4 is Fig. 3 B-B profiles；
Fig. 5 is described in embodiment 3 there is convergence type seal clearance to be pumped into formula Spiral Groove Dry Gas Seals by Use structural representation；
Fig. 6 is Fig. 5 C-C profiles；
Fig. 7 is described in embodiment 4 there is convergence type seal clearance to be pumped into formula Spiral Groove Dry Gas Seals by Use structural representation；
Fig. 8 is Fig. 7 D-D profiles.
In figure：1- rotating rings, 2- convergence type seal clearances, 3- stationary rings, 4- rotary shafts, 5- seals dams area I, 6- transition faces, 7-
Platform area between seals dam area II, 8- helicla flutes, the two neighboring helicla flutes of 9-,r 1 - transition face section start to sealing ring end face is justified
The distance of the heart,r i - sealing ring internal diameter.
Embodiment
With reference to the accompanying drawings and examples, the invention will be further described, but present disclosure be not limited to it is described
Scope.
Embodiment 1
As depicted in figs. 1 and 2, it is a kind of to be pumped into formula Spiral Groove Dry Gas Seals by Use structure, including two with convergence type seal clearance
Sealing ring, i.e. rotating ring 1 and stationary ring 3,12 helicla flutes 8 are circumferentially equably provided with the end face outside diameter of rotating ring 1, and groove depth is 3 μm, spiral shell
Swing angle is 15 °, and gas flows radially from outside diameter to internal diameter side；In the end face of rotating ring 1 one is machined with by the position of inner radius
Transition face 6, makes flow direction of the seal clearance of two sealing interannulars along gas form convergence type seal clearance 2, transition face 6
Form is the conical surface；
The section start of transition face 6 to the sealing ring end face center of circle distancer 1 For sealing ring internal diameterr i 1.01 times；The axial plane of transition face 6 is thrown
Angle between shadow profile and axisθFor 76 °；Axial difference in height between seals dam area I 5 and seals dam area II 7h sFor spiral
Groove dry gas seals balance thicknessh 00.3 times.
Embodiment 2
As shown in Figure 3 and Figure 4, it is a kind of to be pumped into formula Spiral Groove Dry Gas Seals by Use structure, including two with convergence type seal clearance
Sealing ring, i.e. rotating ring 1 and stationary ring 3,6 helicla flutes 8 are circumferentially equably provided with the end face outside diameter of stationary ring 3, and groove depth is 100 μm,
Helical angle is 5 °, and gas flows radially from outside diameter to internal diameter side；In the end face of rotating ring 1 one is machined with by the position of inner radius
Transition face 6, makes flow direction of the seal clearance of two sealing interannulars along gas form convergence type seal clearance 2, transition face 6
Form is sphere；
The section start of transition face 6 to the sealing ring end face center of circle distancer 1 For sealing ring internal diameterr i 1.15 times；The axial plane of transition face 6 is thrown
Angle between shadow profile and axisθFor 0 °；Axial difference in height between seals dam area I 5 and seals dam area II 7h sFor helicla flute
Dry gas seals balance thicknessh 00.1 times.
Embodiment 3
As shown in Figure 5 and Figure 6, it is a kind of to be pumped into formula Spiral Groove Dry Gas Seals by Use structure, including two with convergence type seal clearance
Sealing ring, i.e. rotating ring 1 and stationary ring 3,10 helicla flutes 8 are circumferentially equably provided with the end face outside diameter of rotating ring 1, and groove depth is 10 μm,
Helical angle is 85 °, and gas flows radially from outside diameter to internal diameter side；In the end face of stationary ring 3 one is machined with by the position of inner radius
Individual transition face 6, makes flow direction of the seal clearance of two sealing interannulars along gas form convergence type seal clearance 2, transition face 6
Form be ellipsoid；
The section start of transition face 6 is to the sealing ring end face center of circle apart from r1For sealing ring internal diameter ri1.05 times；The axial plane of transition face 6 is thrown
Angle between shadow profile and axisθFor 60 °；Axial difference in height between seals dam area I 5 and seals dam area II 7h sFor spiral
Groove dry gas seals balance thicknessh 00.9 times.
Embodiment 4
As shown in Figure 7 and Figure 8, it is a kind of to be pumped into formula Spiral Groove Dry Gas Seals by Use structure, including two with convergence type seal clearance
Sealing ring, i.e. rotating ring 1 and stationary ring 3,30 helicla flutes 8 are circumferentially equably provided with the end face outside diameter of stationary ring 3, and groove depth is 60 μm,
Helical angle is 15 °, and gas flows radially from outside diameter to internal diameter side；In the end face of stationary ring 3 one is machined with by the position of inner radius
Individual transition face 6, makes flow direction of the seal clearance of two sealing interannulars along gas form convergence type seal clearance 2, transition face 6
Form be Irregular Boundary Surface；
The section start of transition face 6 is to the sealing ring end face center of circle apart from r1For sealing ring internal diameter ri1.1 times；The axial plane of transition face 6 is thrown
Angle between shadow profile and axisθFor 30 °；Axial difference in height between seals dam area I 5 and seals dam area II 7h sFor spiral
Groove dry gas seals balance thicknessh 00.6 times.
Claims (7)
1. a kind of be pumped into formula Spiral Groove Dry Gas Seals by Use structure, including two sealing rings, i.e. rotating ring with convergence type seal clearance
（1）And stationary ring（3）, any one sealing ring end face outside diameter is circumferential wherein is equably provided with multiple helicla flutes（8）, gas edge
Radially flowed from outside diameter to internal diameter side；In any one sealing ring end face a transition face is machined with by the position of inner radius
（6）, flow direction of the seal clearance of two sealing interannulars along gas is formed convergence type seal clearance（2）.
2. according to claim 1 be pumped into formula Spiral Groove Dry Gas Seals by Use structure, its feature with convergence type seal clearance
It is, helicla flute（8）Number be 4 ~ 40, groove depth be 3 ~ 100 μm, helical angle be 1 ° ~ 90 °.
3. according to claim 1 be pumped into formula Spiral Groove Dry Gas Seals by Use structure, its feature with convergence type seal clearance
It is, transition face（6）Section start to the distance in the sealing ring end face center of circle is 1.01 ~ 1.18 times of sealing ring internal diameter.
4. according to claim 1 be pumped into formula Spiral Groove Dry Gas Seals by Use structure, its feature with convergence type seal clearance
It is, seals dam area I（5）With seals dam area II（7）Axial difference in heighth sThickness is balanced for Spiral Groove Dry Gas Seals by Useh 00.1 ~
0.9 times.
5. according to claim 1 be pumped into formula Spiral Groove Dry Gas Seals by Use structure, its feature with convergence type seal clearance
It is, transition face（6）For non-planar form.
6. according to claim 5 be pumped into formula Spiral Groove Dry Gas Seals by Use structure, its feature with convergence type seal clearance
It is, transition face（6）Form be the conical surface, sphere, ellipsoid or curved surface.
7. according to claim 1 be pumped into formula Spiral Groove Dry Gas Seals by Use structure, its feature with convergence type seal clearance
It is, transition face（6）Angle between axis plane projection profile and axisθFor 0 ° ~ 80 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710216166.0A CN106969148A (en) | 2017-04-05 | 2017-04-05 | It is a kind of to be pumped into formula Spiral Groove Dry Gas Seals by Use structure with convergence type seal clearance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710216166.0A CN106969148A (en) | 2017-04-05 | 2017-04-05 | It is a kind of to be pumped into formula Spiral Groove Dry Gas Seals by Use structure with convergence type seal clearance |
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| Publication Number | Publication Date |
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| CN106969148A true CN106969148A (en) | 2017-07-21 |
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ID=59337137
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710216166.0A Pending CN106969148A (en) | 2017-04-05 | 2017-04-05 | It is a kind of to be pumped into formula Spiral Groove Dry Gas Seals by Use structure with convergence type seal clearance |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111680425A (en) * | 2020-06-11 | 2020-09-18 | 南京工程学院 | Sectional type spiral groove dry gas seal air film pressure calculation method |
| CN115875457A (en) * | 2022-12-01 | 2023-03-31 | 浙江工业大学 | Natural gas dry gas sealing ring structure with lyophobic function surface |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2594554Y (en) * | 2002-11-07 | 2003-12-24 | 天津新技术产业园区鼎名密封有限公司 | Three dimensional helical groove end face sealer with dual helical angle |
| CN101109447A (en) * | 2007-08-15 | 2008-01-23 | 四川日机密封件有限公司 | Hydrodynamic-hydrostatic pressure combined face seal device |
| CN201187474Y (en) * | 2008-01-25 | 2009-01-28 | 昆明理工大学 | Non-flushing seal device for elastic element external pump |
| CN201866253U (en) * | 2010-11-12 | 2011-06-15 | 昆明嘉和科技股份有限公司 | Anhydrous mechanical seal with self-circulation function |
| CN104896099A (en) * | 2015-05-25 | 2015-09-09 | 浙江工业大学 | Gas lubrication cluster spiral groove end face mechanical sealing structure |
| CN105465371A (en) * | 2015-12-30 | 2016-04-06 | 南京林业大学 | Bidirectional-rotation self-pumping fluid dynamic pressure type mechanical seal |
| CN206770615U (en) * | 2017-04-05 | 2017-12-19 | 昆明理工大学 | It is a kind of to be pumped into formula Spiral Groove Dry Gas Seals by Use structure with convergence type seal clearance |
-
2017
- 2017-04-05 CN CN201710216166.0A patent/CN106969148A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2594554Y (en) * | 2002-11-07 | 2003-12-24 | 天津新技术产业园区鼎名密封有限公司 | Three dimensional helical groove end face sealer with dual helical angle |
| CN101109447A (en) * | 2007-08-15 | 2008-01-23 | 四川日机密封件有限公司 | Hydrodynamic-hydrostatic pressure combined face seal device |
| CN201187474Y (en) * | 2008-01-25 | 2009-01-28 | 昆明理工大学 | Non-flushing seal device for elastic element external pump |
| CN201866253U (en) * | 2010-11-12 | 2011-06-15 | 昆明嘉和科技股份有限公司 | Anhydrous mechanical seal with self-circulation function |
| CN104896099A (en) * | 2015-05-25 | 2015-09-09 | 浙江工业大学 | Gas lubrication cluster spiral groove end face mechanical sealing structure |
| CN105465371A (en) * | 2015-12-30 | 2016-04-06 | 南京林业大学 | Bidirectional-rotation self-pumping fluid dynamic pressure type mechanical seal |
| CN206770615U (en) * | 2017-04-05 | 2017-12-19 | 昆明理工大学 | It is a kind of to be pumped into formula Spiral Groove Dry Gas Seals by Use structure with convergence type seal clearance |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111680425A (en) * | 2020-06-11 | 2020-09-18 | 南京工程学院 | Sectional type spiral groove dry gas seal air film pressure calculation method |
| CN111680425B (en) * | 2020-06-11 | 2024-02-02 | 南京工程学院 | Sectional type spiral groove dry gas seal air film pressure calculation method |
| CN115875457A (en) * | 2022-12-01 | 2023-03-31 | 浙江工业大学 | Natural gas dry gas sealing ring structure with lyophobic function surface |
| CN115875457B (en) * | 2022-12-01 | 2023-08-08 | 浙江工业大学 | Natural gas dry gas sealing ring structure with lyophobic functional surface |
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| PB01 | Publication | ||
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Application publication date: 20170721 |