CN107355530A - The sealing ring and its sealing device of non-contact zero leakage - Google Patents
The sealing ring and its sealing device of non-contact zero leakage Download PDFInfo
- Publication number
- CN107355530A CN107355530A CN201710706195.5A CN201710706195A CN107355530A CN 107355530 A CN107355530 A CN 107355530A CN 201710706195 A CN201710706195 A CN 201710706195A CN 107355530 A CN107355530 A CN 107355530A
- Authority
- CN
- China
- Prior art keywords
- sealing ring
- seal face
- ring
- sealing
- radially inner
- 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 57
- 239000012530 fluid Substances 0.000 claims abstract description 16
- 230000002093 peripheral effect Effects 0.000 claims description 8
- 238000010276 construction Methods 0.000 claims description 4
- 239000007788 liquid Substances 0.000 abstract 2
- 239000010687 lubricating oil Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- CVOFKRWYWCSDMA-UHFFFAOYSA-N 2-chloro-n-(2,6-diethylphenyl)-n-(methoxymethyl)acetamide;2,6-dinitro-n,n-dipropyl-4-(trifluoromethyl)aniline Chemical compound CCC1=CC=CC(CC)=C1N(COC)C(=O)CCl.CCCN(CCC)C1=C([N+]([O-])=O)C=C(C(F)(F)F)C=C1[N+]([O-])=O CVOFKRWYWCSDMA-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 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
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/02—Gearboxes; Mounting gearing therein
- F16H57/029—Gearboxes; Mounting gearing therein characterised by means for sealing the gearboxes, e.g. to improve airtightness
-
- 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
- F16J15/38—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member sealed by a packing
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mechanical Sealing (AREA)
Abstract
The sealing ring and its sealing device of non-contact zero leakage.The fluid dynamic pressure groove less than transverse plane is provided with the seal face of the sealing ring, the fluid dynamic pressure groove is arranged in the radially inner side position that can be communicated with air in seal face, and it is opposite by the trend of radially inner side to radial outside and the direction of rotation of sealing ring on seal face.The sealing ring combines the principle of tradition machinery sealing ring and seal ring of dry gas, the dynamic equilibrium reached by the leak pressure of the liquid medium side between seal face with the atmospheric pressure that opposite side is redirected back into the intermediate region of seal face, prevent liquid medium continue leakage and air is gone successively to, reach extremely low leakage and the requirement of long-life.
Description
Technical field
The present invention relates to it is a kind of can non-contact zero leakage that is particularly suitable but being not limited only to express pump step-up gear it is close
Seal ring and its sealing device.
Background technology
End surface mechanical sealing is that have widely used a kind of dynamic seal structure/device at present.With express pump speedup tooth
Exemplified by roller box, express pump is driven by " motor+step-up gear ", and its arrangement form has horizontal and vertical two kinds.Increase
The shaft end of fast gearbox high-speed output shaft need to set a set of sealing device, to prevent gear box lubricating oil from being leaked to air direction.
The operating pressure of its sealing device is generally less than 0.2MPa, but rotating speed then may be up to more than per minute ten thousand turns, and its annular seal space
Space is extremely compact.Tradition is all using single end face contacting mechanical seal, but because the rotating speed of sealing is up to 20000rpm
More than, substantial amounts of frictional heat can be produced in seal face in running, under conditions of being rinsed without outside, caused heat exists
Seal face accumulation is not easy to take away, and is easily caused sealed graphite ring and blister occurs, causes the leakage rate of lubricating oil to increase.Although at present
Constantly optimized on mechanical seal design, but the average life sealed is typically still less than 6 months and unstable, it is difficult
To meet requirement.
The content of the invention
In consideration of it, can be particularly suitable the invention provides one kind, but be not limited only to the non-of express pump step-up gear and connect
Touch zero leakage sealing ring, and corresponding sealing device on this basis.
The sealing ring of the non-contact zero leakage of the present invention, basic structure are low also in being provided with the seal face of sealing ring
In the fluid dynamic pressure groove of transverse plane.Wherein, described fluid dynamic pressure groove is arranged on the footpath that can be communicated with air in seal face
Into inside line, and its trend on seal face from radially inner side to radial outside and the direction of rotation phase of sealing ring
Instead.
Fluid dynamic pressure groove described in said structure, the single rotation direction for being only applicable to one direction rotating seal ring can be included
Groove, or the double rotational directions groove of positive and negative two kinds of direction of rotation rotating seal rings can be applicable to.For example, can according to being actually needed,
Using usual manner design on seal face from radially inner side to footpath on the outside of trend it is opposite with the direction of rotation of sealing ring
Single rotation direction groove.Wherein, described single rotation direction groove can also have different specific constructive forms, include the both ends difference position of its groove
Within the interior outer peripheral edge of seal face（The groove of intermarginal non-penetrating type i.e. inside and outside seal face）, or the radially inner side of groove
End opening is in forms such as the inner peripherals of seal face（I.e. in the through groove of the radially inner side of seal face）.Described double rotational directions
Groove, it can be equally designed as in the usual way within the interior outer peripheral edge of seal face according to being actually needed（I.e. in seal face
Inside and outside intermarginal non-penetrating type）, and there is pair of two-part structure identical and opposite with sealing ring direction of rotation simultaneously in structure
Title type double rotational directions groove.
On the basis of said structure sealing ring, express pump step-up gear of the invention is sealed with non-contact zero leakage and filled
Put, be on the basis of with conventional structure, i.e., there is stationary ring and rotating ring that coaxial line is oppositely arranged, its is relative in structure
End face be seal face, stationary ring therein is supported in stationary seat through axially arranged elastic construction, rotating ring with rotation
Axle is connected.Wherein, described stationary ring or rotating ring, it is close using the sealing ring of said structure form such as of the present invention
The radially inner side of seal ring keeps communicating with air.
As can be seen that the sealing ring of the non-contact zero leakage of said structure of the present invention, was both sealed different from tradition machinery,
Different from dry gas seals, but a kind of improved sealing ring of design concept both it is merged.Fitted by end face width dimensions
On the basis of degree is widened, the set location of its fluid dynamic pressure groove employs the mode opposite with traditional seal ring of dry gas, is arranged on
Can be therewith in the position of the radially inner side for the seal face that air communicates.Still by taking express pump step-up gear as an example, in static bar
During part, under elastic construction effect of the sealing device in stationary ring unit, the seal face of activity-inertia sealing interannular is bonded to each other, resistance
Oil leak is stopped；In high-speed cruising state, seal face radial outside（Seal upstream）Lubricating oil by its pressure
Effect, equally can be radially from the outside of seal face to inward side to leakage with tradition machinery sealing, and its leak pressure is along close
The radial direction in end-blocking face gradually reduces；The seal face radially inner side communicated with air（Seal downstream）Air, then can through with
The opposite fluid dynamic pressure groove in the direction of rotation of sealing ring is pumped into fluid dynamic pressure groove and reverse supercharging, and its pressure is from seal face
Inside To Outside makes the seal face of static-dynamic ring be separated and realize non-contact operation along radially constantly increasing.Now
The working condition of seal face is：In the appropriate area among seal face, by the reverse supercharging entered on the inside of seal face
Gas pressure, the pressure of the lubricating oil with being leaked from seal face radial outside is just equal, realize lubricating oil not followed by
Continue largely to internal leakage, the air being redirected back into also will not continue to the dynamic equilibrium being largely outwardly into.Therefore, compared to existing
Contacting mechanical seal, said structure form sealing ring of the present invention can prevent sealing when realizing non-contact operating
While directly abrasion and blister generation occur for end face, the zero leakage of lubricating oil or atomic leakage can be also realized, so as to greatly
Ground extends the service life of sealing.
Below in conjunction with the embodiment by accompanying drawing illustrated embodiment, the above of the present invention is remake further
Describe in detail.But the scope that this should not be interpreted as to the above-mentioned theme of the present invention is only limitted to following example.The present invention is not being departed from
In the case of above-mentioned technological thought, the various replacements or change made according to ordinary skill knowledge and customary means all should
It is included within the scope of the invention.
Brief description of the drawings
Fig. 1 is a kind of structural representation of the sealing ring of single non-contact zero leakage of rotation direction of the present invention.
Fig. 2 is a kind of structural representation of the sealing ring of the non-contact zero leakage of double rotational directions of the present invention.
Fig. 3 is a kind of structural representation of non-contact zero leakage sealing device of the present invention.
Embodiment
Shown in Fig. 1 is a kind of basic structure of single rotation direction sealing ring of non-contact zero leakage of the present invention.In sealing ring 1
Seal face 2 on be provided with fluid dynamic pressure groove 3 less than transverse plane.The fluid dynamic pressure groove 3 is to be arranged in seal face
From radially inner side to the trend of radial outside and sealing ring in the radially inner side position that can be communicated with air and on seal face
The opposite single rotation direction groove in direction of rotation.The concrete form of single rotation direction groove, can according to actual needs, by current routine side
Formula designs.Wherein, the both ends of its fluid dynamic pressure groove 3 are except non-within the interior outer peripheral edge of seal face respectively as shown in Figure 1
Outside insertion form, can also use makes its radially inner side end 4 be opened on the form on seal face inner peripheral 5.
It is a kind of basic structure of the double rotational directions sealing ring of non-contact zero leakage of the present invention shown in Fig. 2.The fluid moves
Indent 3 is arranged in the radially inner side position that can be communicated with air in seal face, is had simultaneously in structure and is revolved with sealing ring
Turn the identical and opposite two-part structure in direction.
Fig. 3 is a kind of non-contact zero leakage sealing device of horizontal high-speed pump step-up gear of the invention, is had in structure
There are the stationary ring 12 and rotating ring 11 that coaxial line is oppositely arranged, its relative end face is seal face, and stationary ring 12 therein passes through
Axially arranged elastic construction 9 and throw-out collar 8 is supported in stationary seat 7, and rotating ring 11 is connected with rotary shaft 10, and its spy is static
Using the sealing ring of such as Fig. 1 or Fig. 2 structures, the radially inner side of sealing ring is to be communicated with air for ring 12 or rotating ring 11.
Claims (6)
1. the sealing ring of non-contact zero leakage, in sealing ring（1）Seal face（2）On the fluid that is provided with less than transverse plane move
Indent（3）, it is characterized in that described fluid dynamic pressure groove（3）The radially inner side portion that can be communicated with air being arranged in seal face
In position, and it is opposite by the trend of radially inner side to radial outside and the direction of rotation of sealing ring on seal face.
2. sealing ring as claimed in claim 1, it is characterized in that described fluid dynamic pressure groove（3）For on seal face by radially
Interior trend laterally on the outside of the footpath single rotation direction groove opposite with the direction of rotation of sealing ring.
3. sealing ring as claimed in claim 2, it is characterized in that the both ends of described single rotation direction groove are respectively positioned at seal face
Within interior outer peripheral edge.
4. sealing ring as claimed in claim 2, it is characterized in that the radially inner side end of described single rotation direction groove（4）It is opened on sealing
The inner peripheral of end face（5）.
5. sealing ring as claimed in claim 1, it is characterized in that described fluid dynamic pressure groove（3）To be arranged in seal face
There are the symmetric form double rotational directions of two-part structure identical and opposite with sealing ring direction of rotation simultaneously within outer peripheral edge, and in structure
Groove.
6. the non-contact zero leakage sealing device of express pump step-up gear, there is the stationary ring that coaxial line is oppositely arranged（12）With
Rotating ring（11）, its relative end face is seal face, stationary ring therein（12）Through axially arranged elastic construction（9）Supporting
In stationary seat（7）It is interior, rotating ring（11）With rotary shaft（10）Drive connection, it is characterized in that described stationary ring（12）Or rotating ring
（11）For the sealing ring of the structure as described in one of claim 1 to 5, the radially inner side of sealing ring communicates with air.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710706195.5A CN107355530A (en) | 2017-08-17 | 2017-08-17 | The sealing ring and its sealing device of non-contact zero leakage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710706195.5A CN107355530A (en) | 2017-08-17 | 2017-08-17 | The sealing ring and its sealing device of non-contact zero leakage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107355530A true CN107355530A (en) | 2017-11-17 |
Family
ID=60286649
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710706195.5A Pending CN107355530A (en) | 2017-08-17 | 2017-08-17 | The sealing ring and its sealing device of non-contact zero leakage |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107355530A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108825549A (en) * | 2018-05-02 | 2018-11-16 | 江苏大学 | A kind of centrifugal pump radial seal ring with airfoil type guide vane |
| CN115419711A (en) * | 2022-08-29 | 2022-12-02 | 浙江工业大学 | Double-end-surface floating dynamic pressure type piston ring sealing structure |
| CN115929906A (en) * | 2022-12-23 | 2023-04-07 | 中密控股股份有限公司 | Double-rotation inward-pressing type hydrodynamic groove non-contact mechanical seal ring and working method |
| CN119825909A (en) * | 2025-03-18 | 2025-04-15 | 浙江恒齿传动股份有限公司 | Shaft end dynamic seal's speed reducer |
Citations (9)
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|---|---|---|---|---|
| TW200619534A (en) * | 2004-10-08 | 2006-06-16 | Nippon Pillar Packing | Static-pressure type non-contacting gas seal |
| CN201306445Y (en) * | 2008-10-16 | 2009-09-09 | 东营海森密封技术有限责任公司 | Liquid film lubrication double end surface non-contact mechanical seal device |
| JP2010216587A (en) * | 2009-03-17 | 2010-09-30 | Eagle Ind Co Ltd | Sealing device |
| CN201621270U (en) * | 2009-12-24 | 2010-11-03 | 沈阳北碳密封有限公司 | Zero-leakage spiral groove end face mechanical sealing device |
| CN202833991U (en) * | 2012-08-10 | 2013-03-27 | 江苏中机矿山设备有限公司 | Idler shaft set for shearer |
| CN103453147A (en) * | 2013-09-30 | 2013-12-18 | 四川日机密封件股份有限公司 | Non-contact mechanical seal ring with dual-rotating-direction hydrodynamic grooves |
| WO2016167262A1 (en) * | 2015-04-15 | 2016-10-20 | イーグル工業株式会社 | Sliding parts |
| 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 |
| CN207333648U (en) * | 2017-08-17 | 2018-05-08 | 四川日机密封件股份有限公司 | The sealing ring and its sealing device of non-contact zero leakage |
-
2017
- 2017-08-17 CN CN201710706195.5A patent/CN107355530A/en active Pending
Patent Citations (10)
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|---|---|---|---|---|
| TW200619534A (en) * | 2004-10-08 | 2006-06-16 | Nippon Pillar Packing | Static-pressure type non-contacting gas seal |
| CN201306445Y (en) * | 2008-10-16 | 2009-09-09 | 东营海森密封技术有限责任公司 | Liquid film lubrication double end surface non-contact mechanical seal device |
| JP2010216587A (en) * | 2009-03-17 | 2010-09-30 | Eagle Ind Co Ltd | Sealing device |
| CN201621270U (en) * | 2009-12-24 | 2010-11-03 | 沈阳北碳密封有限公司 | Zero-leakage spiral groove end face mechanical sealing device |
| CN202833991U (en) * | 2012-08-10 | 2013-03-27 | 江苏中机矿山设备有限公司 | Idler shaft set for shearer |
| CN103453147A (en) * | 2013-09-30 | 2013-12-18 | 四川日机密封件股份有限公司 | Non-contact mechanical seal ring with dual-rotating-direction hydrodynamic grooves |
| WO2016167262A1 (en) * | 2015-04-15 | 2016-10-20 | イーグル工業株式会社 | Sliding parts |
| US20180073394A1 (en) * | 2015-04-15 | 2018-03-15 | Eagle Industry Co., Ltd. | Sliding component |
| 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 |
| CN207333648U (en) * | 2017-08-17 | 2018-05-08 | 四川日机密封件股份有限公司 | The sealing ring and its sealing device of non-contact zero leakage |
Non-Patent Citations (1)
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| 张树强等: "动静压混合式气体密封追随性及主动调控振动特性数值分析", 《航空学报》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108825549A (en) * | 2018-05-02 | 2018-11-16 | 江苏大学 | A kind of centrifugal pump radial seal ring with airfoil type guide vane |
| CN115419711A (en) * | 2022-08-29 | 2022-12-02 | 浙江工业大学 | Double-end-surface floating dynamic pressure type piston ring sealing structure |
| CN115929906A (en) * | 2022-12-23 | 2023-04-07 | 中密控股股份有限公司 | Double-rotation inward-pressing type hydrodynamic groove non-contact mechanical seal ring and working method |
| CN119825909A (en) * | 2025-03-18 | 2025-04-15 | 浙江恒齿传动股份有限公司 | Shaft end dynamic seal's speed reducer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: 610045 Sichuan city of Chengdu province Wuhou District Vuko Xisi Road No. 8 Applicant after: Zhongmi Holding Co.,Ltd. Address before: 610045 Sichuan city of Chengdu province Wuhou District Vuko Xisi Road No. 8 Applicant before: SICHUAN SUNNY SEAL Co.,Ltd. |
|
| CB02 | Change of applicant information | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20171117 |
|
| RJ01 | Rejection of invention patent application after publication |