CN108825788A - Mechanical sealing end face structure - Google Patents
Mechanical sealing end face structure Download PDFInfo
- Publication number
- CN108825788A CN108825788A CN201810793511.1A CN201810793511A CN108825788A CN 108825788 A CN108825788 A CN 108825788A CN 201810793511 A CN201810793511 A CN 201810793511A CN 108825788 A CN108825788 A CN 108825788A
- Authority
- CN
- China
- Prior art keywords
- face
- helicla flute
- rotating ring
- pressure side
- helical duct
- 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.)
- Pending
Links
- 238000007789 sealing Methods 0.000 title claims abstract description 28
- 239000012530 fluid Substances 0.000 abstract description 15
- 230000004888 barrier function Effects 0.000 abstract description 4
- 230000003068 static effect Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000010992 reflux Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- F16J15/34—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member
- F16J15/3436—Pressing means
- F16J15/3448—Pressing means the pressing force resulting from fluid pressure
-
- 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
- F16J15/164—Sealings between relatively-moving surfaces the sealing action depending on movements; pressure difference, temperature or presence of leaking fluid
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Sealing (AREA)
Abstract
The present invention relates to a kind of mechanical sealing end face structure, including rotating ring and stationary ring, rotating ring and stationary ring outside diameter are high-pressure side, and internal side diameter is low-pressure side；The end face of rotating ring and the end face of stationary ring are bonded setting；The end face of rotating ring has been arranged circumferentially multiple helicla flutes；Rotating ring end face between helicla flute and low-pressure side is seals dam, and helical duct is provided between helicla flute and high-pressure side；Rotating ring end face between each helicla flute and between each helical duct is sealing weir.This structure is respectively arranged with sealing weir and seals dam between helicla flute and high-pressure side between low-pressure side, reduce leakage-gap space to reduce leakage rate, high pressure barrier has been constructed for entire seal face close to the higher-pressure region that on high-tension side slot root position is formed by each helicla flute, it reduces leakage rate and even realizes zero leakage, and opening force can be improved in higher-pressure region, and helicla flute root is formed by low-pressure area can be with suck fluid back medium, and structure is simple, practical, comprehensive performance is superior.
Description
Technical field
The present invention relates to a kind of mechanical seal end surface structures, in particular to the mechanical sealing end of spiral groove channel
Face structure, belongs to technical field of mechanical.
Background technique
Mechanical seal is that axial gap is changed into radial clearance, the dynamic and static pressure effect generated using fluid film between gap
A kind of mechanical device for preventing dielectric leakage is widely used in petrochemical industry, and space flight and aviation, nuclear industry, electric power, oil, gas and water are defeated
It send, in the mechanical equipments such as all kinds of pumps, kettle, compressor, blender in the industries such as papermaking.Environmentally protective under New Era, peace
The thoughts such as complete reliable, energy-saving and emission-reduction, and as the operating condition of industrial boom various requirement harshness all proposes mechanical seal
Higher new requirement.In order to improve the properties of mechanical seal, various groove profiles usually are set in rotating ring or stationary ring end face
Structure, to improve face opening power, reduction leakage etc.；Simple trench structure cannot both take into account, complicated trench structure
Manufacturing process is more, at high cost；Especially in equipment start-stop, mechanical seal cannot give full play to and should have effect.
Summary of the invention
In view of above-mentioned background, the present invention provides a kind of mechanical sealing end face structures, it can realizes low leakage very
To zero leakage, while higher face opening power may be implemented, and have the advantages such as start-stop performance is good, manufacturing cost is low,
Comprehensive performance is superior.
Technical solution of the present invention is as follows：
A kind of mechanical sealing end face structure, it is characterised in that：Including rotating ring and stationary ring, rotating ring and stationary ring outside diameter are
High-pressure side, internal side diameter are low-pressure side；The end face of rotating ring and the end face of stationary ring are bonded setting；The end face of rotating ring has been arranged circumferentially
Multiple helicla flutes；Rotating ring end face between helicla flute and low-pressure side is seals dam, and spiral is provided between helicla flute and high-pressure side
Channel；Rotating ring end face between each helicla flute and between each helical duct is sealing weir.
Moreover, the two circumferential wall shape of helicla flute is circular arc, two radial wall configurations are helix；Its helical angle is
10 °~60 °；Helicla flute number is 8~18；The ratio between sealing weir circumferential width between helicla flute circumferential width and two helicla flutes
It is 1/1~3/1；Spiral groove depth is 1~50 μm.
Moreover, the wall surface hand of helix of the helicla flute is opposite with rotating ring direction of rotation.
Moreover, the seals dam width is the 1/6~1/4 of rotating ring end face width.
Moreover, the helical duct wall configuration is spiral yarn shaped, the spiral yarn shaped and helicla flute helix line
Shape parameter is identical；Helical duct width is the 1/6~1/2 of helicla flute circumferential width；Helical duct depth is 1~50 μm.
Moreover, a wall surface helix of the helical duct is overlapped or is spaced with one wall surface helix of the helicla flute
Setting.
Moreover, the sealing weir radial width between the helical duct is the 1/6~1/3 of rotating ring end face width.
Outstanding advantages and benefit of the invention：
(1) helicla flute and it is indirect run through high-pressure side or low-pressure side, but between helicla flute and high-pressure side and
It is respectively arranged with sealing weir and seals dam between low-pressure side, reduces leakage-gap space to reduce leakage rate；
It (2) is that entire seal face has constructed height close to the higher-pressure region that on high-tension side slot root position is formed by each helicla flute
Barrier is pressed, which is greater than high side pressure, so that medium be prevented to leak to seal clearance；
(3) low-pressure area formed by each helicla flute close to the slot root of atmosphere low-pressure side position, keeps fluid film low with atmosphere
Pressure side is formed effectively excessively, and the pressure of the low-pressure area is less than atmosphere low-pressure lateral pressure, to reduce leakage rate even reality
Existing zero leakage；
(4) seals dam area reflux fluid under the influence of centrifugal force, flows back into medium high-pressure side along helical duct, real
Now reflux pumping；
(5) helical duct due to width it is smaller, therefore will not influence the effective range and radiation area of the high pressure barrier
Domain；
(6) this mechanical seal end surface structure sealing performance during equipment start-stop is excellent.
Detailed description of the invention
One example schematic of rotating ring end face structure technical solution described in Fig. 1.It is marked in figure：1 --- helicla flute is close to low pressure
Side channel root position；2 --- helicla flute, 3 --- seals dam；4 --- sealing weir；5 --- helical duct；6 --- helicla flute is close
High pressure side channel root position.
Rotating ring end face structure geometric parameter schematic diagram described in Fig. 2.It is marked in figure：7 --- helicla flute circumferential wall；8——
Helicla flute radial direction wall surface；9 --- helicla flute radial direction wall surface；10 --- helical duct wall surface；11 --- helicla flute circumferential wall.
Two example schematic of rotating ring end face structure technical solution described in Fig. 3
Specific embodiment
A kind of summary of the invention of mechanical sealing end face structure of the present invention is specifically described below in conjunction with attached drawing.
Embodiment one：
A kind of mechanical seal end surface structure, including rotating ring and stationary ring；The rotating ring and stationary ring outside diameter are high-pressure side, internal diameter
Side is low-pressure side；The end face of rotating ring and the end face of stationary ring are bonded setting；The rotating ring end face has been arranged circumferentially helicla flute；Institute
The rotating ring end face stated between helicla flute and low-pressure side is seals dam, is provided with helical duct between the helicla flute and high-pressure side；
Rotating ring end face between each helicla flute and between each helical duct is sealing weir.
The two circumferential wall shape of helicla flute is circular arc, and two radial wall configurations are helix；Helicla flute number be 8~
18；The ratio between sealing weir circumferential width between helicla flute circumferential width and two helicla flutes is 1/1~3/1；Spiral groove depth
It is 1~50 μm, 10 °~60 ° of helical angle.
The wall surface hand of helix of the helicla flute is opposite with rotating ring direction of rotation ω.
The seals dam width is the 1/6~1/4 of rotating ring end face width.
The helical duct wall configuration is helix, the helix line style parameter phase of the helix and the helicla flute
Together；Helical duct width is the 1/6~1/2 of helicla flute circumferential width；Helical duct depth is 1~50 μm.
One wall surface helix of the helical duct is overlapped with one wall surface helix of the helicla flute.
Sealing weir radial width between the helical duct is the 1/6~1/3 of rotating ring end face width.
Embodiment two：
One wall surface helix of the helical duct is with one wall surface pitch circumferential width of the helicla flute
The 1/15 of helicla flute circumferential width, remaining feature are identical as embodiment one.
Embodiments described above one, two contents are only a kind of novel mechanical end face structure invention of the present invention
One of example of content, protection scope of the present invention are not construed as being only limitted to concrete form described in embodiment one, two.
The working principle of the invention：
When equipment is in dead ship condition, a certain amount of medium fluid is flowed into helicla flute (2) along helical duct (5), but
Since the presence of seals dam (3) will not continue to leak into low-pressure side.
When equipment starting, the rotational flow of the medium fluid phantom ring in helicla flute (2) and to converge at helicla flute close
On high-tension side slot root position (6), due to this position, groove profile, which is become narrow gradually, generates squeezing action to medium fluid, therefore Fluid pressure is
It carves and increases, realize the quick separating of the rotating ring end face and stationary ring end face to reduce dynamic and static end wear.
With the rotating ring, the separation of stationary ring end face, fluid media (medium) is filled in seal clearance；With the rotation of rotating ring,
Helicla flute gradually broadens close to the slot root of atmosphere low-pressure side position (1) groove profile, therefore plays the role of " evacuating " to fluid at this, thus
Form low-pressure area；High-pressure side is flowed back into along helical duct (5) under the influence of centrifugal force by the segment fluid flow of " evacuation ", " is dredged
Dissipate " another part fluid then converge to helicla flute close on high-tension side slot root position (6), form stable high pressure barrier；And
Fluid resorption at seals dam described in surrounding (3) is reduced leakage rate by low-pressure area.
When equipment parking, converging at fluid of the helicla flute close to high pressure side channel root position (6) will not be pumped out, with dynamic
The pressure at the reduction of the ring revolving speed position is gradually lowered, and rotating ring end face and stationary ring end face move closer to, until rotating ring stops rotation
Turn, dynamic and static ring end face is bonded again.And the fluid for residing in helicla flute (2) dynamic and static ring when being then again started up conducive to equipment
End face separation.
Although disclosing the embodiment of the present invention and attached drawing for the purpose of illustration, those skilled in the art can be managed
Solution：Do not departing from the present invention and spirit and scope of the appended claims in, various substitutions, changes and modifications be all it is possible,
Therefore, the scope of the present invention is not limited to the embodiment and attached drawing disclosure of that.
Claims (7)
1. a kind of mechanical sealing end face structure, it is characterised in that：Including rotating ring and stationary ring, rotating ring and stationary ring outside diameter are height
Side is pressed, internal side diameter is low-pressure side；The end face of rotating ring and the end face of stationary ring are bonded setting；The end face of rotating ring has been arranged circumferentially more
A helicla flute；Rotating ring end face between helicla flute and low-pressure side is seals dam, and it is logical that spiral is provided between helicla flute and high-pressure side
Road；Rotating ring end face between each helicla flute and between each helical duct is sealing weir.
2. a kind of mechanical sealing end face structure as described in claim 1, it is characterised in that：The circumferential wall of the helicla flute two
Face shape is circular arc, and two radial wall configurations are helix；Its helical angle is 10 °~60 °；Helicla flute number is 8~18；Spiral shell
The ratio between sealing weir circumferential width between spin slot circumferential width and two helicla flutes is 1/1~3/1；Spiral groove depth is 1~50 μm.
3. a kind of mechanical sealing end face structure as claimed in claim 1 or 2, it is characterised in that：The wall of the helicla flute
Surface helix line direction is opposite with rotating ring direction of rotation.
4. a kind of mechanical sealing end face structure as described in claim 1, it is characterised in that：The seals dam width is institute
State the 1/6~1/4 of rotating ring end face width.
5. a kind of mechanical sealing end face structure as described in claim 1, it is characterised in that：The helical duct wall surface shape
Shape be it is spiral yarn shaped, this is spiral yarn shaped identical as the helix line style parameter of the helicla flute；Helical duct width is helicla flute
The 1/6~1/2 of circumferential width；Helical duct depth is 1~50 μm.
6. a kind of mechanical sealing end face structure as claimed in claim 1 or 5, it is characterised in that：The helical duct
One wall surface helix is overlapped or is spaced setting with one wall surface helix of the helicla flute.
7. a kind of mechanical sealing end face structure as described in claim 1, it is characterised in that：Between the helical duct
Sealing weir radial width is the 1/6~1/3 of rotating ring end face width.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810793511.1A CN108825788A (en) | 2018-07-19 | 2018-07-19 | Mechanical sealing end face structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810793511.1A CN108825788A (en) | 2018-07-19 | 2018-07-19 | Mechanical sealing end face structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108825788A true CN108825788A (en) | 2018-11-16 |
Family
ID=64140783
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810793511.1A Pending CN108825788A (en) | 2018-07-19 | 2018-07-19 | Mechanical sealing end face structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108825788A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110332314A (en) * | 2019-07-16 | 2019-10-15 | 东营海森密封技术有限责任公司 | A kind of mechanically-sealing apparatus |
| CN114060521A (en) * | 2021-11-10 | 2022-02-18 | 浙江环誉泵业科技有限公司 | Mechanical seal end face self-circulation backflow groove with strong self-lubricating and self-cooling effects |
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|---|---|---|---|---|
| US5180173A (en) * | 1990-07-09 | 1993-01-19 | Ebara Corporation | Spiral groove face seal |
| US5201531A (en) * | 1992-04-02 | 1993-04-13 | John Crane Inc. | Face seal with double spiral grooves |
| JPH05164249A (en) * | 1991-12-13 | 1993-06-29 | Nippon John Kureen Kk | Non-contact mechanical seal |
| JP2000193099A (en) * | 1998-12-25 | 2000-07-14 | Eagle Ind Co Ltd | Mechanical seal for gas compressor |
| CN201582390U (en) * | 2009-09-08 | 2010-09-15 | 江苏大学 | Novel mechanical sealing ring with circumferential through groove added at inner-diameter end of radial spiral groove |
| CN103470773A (en) * | 2013-08-23 | 2013-12-25 | 浙江工业大学 | Bird-wing-imitated multichannel groove end face seal structure |
| CN103527792A (en) * | 2013-11-06 | 2014-01-22 | 南京林业大学 | Rotating seal ring with upstream pumping mechanical seal and end face type grooves thereof |
| CN104019237A (en) * | 2014-05-29 | 2014-09-03 | 浙江工业大学 | Deep groove belt dynamic pressure type end face mechanical sealing structure |
| CN104896099A (en) * | 2015-05-25 | 2015-09-09 | 浙江工业大学 | Gas lubrication cluster spiral groove end face mechanical sealing structure |
| CN104913066A (en) * | 2015-06-15 | 2015-09-16 | 浙江工业大学 | Mechanical sealing structure of gas lubricating end face with human pyramid-like combined groove deep grooves |
| CN105465371A (en) * | 2015-12-30 | 2016-04-06 | 南京林业大学 | Bidirectional-rotation self-pumping fluid dynamic pressure type mechanical seal |
| CN205559791U (en) * | 2016-03-22 | 2016-09-07 | 中国石油大学(华东) | Two Y type groove terminal surface mechanical seal structure of symmetric distribution |
| CN205896180U (en) * | 2016-05-10 | 2017-01-18 | 南京科技职业学院 | Double -deck helicla flute dry gas seal friction is vice |
| CN106812947A (en) * | 2017-02-14 | 2017-06-09 | 四川日机密封件股份有限公司 | The non-contacting mechanical seal ring of combined fluid dynamic pressure groove |
| CN107477188A (en) * | 2017-08-30 | 2017-12-15 | 浙江工业大学 | A kind of honeycomb hole helicla flute gas end surface mechanical sealing structure |
| CN206958248U (en) * | 2017-06-21 | 2018-02-02 | 浙江工业大学 | A kind of low leakage helicla flute liquid film mechanical sealing end face structure |
| CN208967041U (en) * | 2018-07-19 | 2019-06-11 | 天津科技大学 | Mechanical sealing end face structure |
-
2018
- 2018-07-19 CN CN201810793511.1A patent/CN108825788A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5180173A (en) * | 1990-07-09 | 1993-01-19 | Ebara Corporation | Spiral groove face seal |
| JPH05164249A (en) * | 1991-12-13 | 1993-06-29 | Nippon John Kureen Kk | Non-contact mechanical seal |
| US5201531A (en) * | 1992-04-02 | 1993-04-13 | John Crane Inc. | Face seal with double spiral grooves |
| JP2000193099A (en) * | 1998-12-25 | 2000-07-14 | Eagle Ind Co Ltd | Mechanical seal for gas compressor |
| CN201582390U (en) * | 2009-09-08 | 2010-09-15 | 江苏大学 | Novel mechanical sealing ring with circumferential through groove added at inner-diameter end of radial spiral groove |
| CN103470773A (en) * | 2013-08-23 | 2013-12-25 | 浙江工业大学 | Bird-wing-imitated multichannel groove end face seal structure |
| CN103527792A (en) * | 2013-11-06 | 2014-01-22 | 南京林业大学 | Rotating seal ring with upstream pumping mechanical seal and end face type grooves thereof |
| CN104019237A (en) * | 2014-05-29 | 2014-09-03 | 浙江工业大学 | Deep groove belt dynamic pressure type end face mechanical sealing structure |
| CN104896099A (en) * | 2015-05-25 | 2015-09-09 | 浙江工业大学 | Gas lubrication cluster spiral groove end face mechanical sealing structure |
| CN104913066A (en) * | 2015-06-15 | 2015-09-16 | 浙江工业大学 | Mechanical sealing structure of gas lubricating end face with human pyramid-like combined groove deep grooves |
| CN105465371A (en) * | 2015-12-30 | 2016-04-06 | 南京林业大学 | Bidirectional-rotation self-pumping fluid dynamic pressure type mechanical seal |
| CN205559791U (en) * | 2016-03-22 | 2016-09-07 | 中国石油大学(华东) | Two Y type groove terminal surface mechanical seal structure of symmetric distribution |
| CN205896180U (en) * | 2016-05-10 | 2017-01-18 | 南京科技职业学院 | Double -deck helicla flute dry gas seal friction is vice |
| CN106812947A (en) * | 2017-02-14 | 2017-06-09 | 四川日机密封件股份有限公司 | The non-contacting mechanical seal ring of combined fluid dynamic pressure groove |
| CN206958248U (en) * | 2017-06-21 | 2018-02-02 | 浙江工业大学 | A kind of low leakage helicla flute liquid film mechanical sealing end face structure |
| CN107477188A (en) * | 2017-08-30 | 2017-12-15 | 浙江工业大学 | A kind of honeycomb hole helicla flute gas end surface mechanical sealing structure |
| CN208967041U (en) * | 2018-07-19 | 2019-06-11 | 天津科技大学 | Mechanical sealing end face structure |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110332314A (en) * | 2019-07-16 | 2019-10-15 | 东营海森密封技术有限责任公司 | A kind of mechanically-sealing apparatus |
| CN114060521A (en) * | 2021-11-10 | 2022-02-18 | 浙江环誉泵业科技有限公司 | Mechanical seal end face self-circulation backflow groove with strong self-lubricating and self-cooling effects |
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