CN207333648U - 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
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- CN207333648U CN207333648U CN201721030744.3U CN201721030744U CN207333648U CN 207333648 U CN207333648 U CN 207333648U CN 201721030744 U CN201721030744 U CN 201721030744U CN 207333648 U CN207333648 U CN 207333648U
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- sealing ring
- seal face
- ring
- sealing
- radially inner
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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 utility model is related to a kind of particularly suitable but being not limited only to express pump step-up gear non-contact zero can let out
Leak sealing ring and its sealing device.
Background technology
End surface mechanical sealing is widely used a kind of dynamic seal structure/device existing at present.With express pump speedup tooth
Exemplified by roller box, express pump is driven by " motor+step-up gear ", its arrangement form has horizontal and two kinds vertical.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 since the rotating speed of sealing is up to 20000rpm
More than, substantial amounts of frictional heat can be produced in seal face in operational process, under conditions of being rinsed without outside, the heat of generation exists
Seal face accumulation is not easy to take away, and easily leads to 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 generally still less than 6 months and unstable, it is difficult
To meet requirement.
Utility model content
In consideration of it, the utility model provide one kind can be particularly suitable, but be not limited only to express pump step-up gear
Non-contact zero leakage sealing ring, and corresponding sealing device on this basis.
The sealing ring of the non-contact zero leakage of the utility model, basic structure on the seal face of sealing ring also in setting
There is the fluid dynamic pressure groove less than transverse plane.Wherein, the fluid dynamic pressure groove is arranged on can be communicated with air in seal face
Radially inner side position in, and its on seal face from radially inner side to the trend of radial outside and the direction of rotation of sealing ring
Conversely.
Fluid dynamic pressure groove described in said structure, can include the single rotation direction for being only applicable to one direction rotating seal ring
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 actual needs,
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, 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）.The double rotational directions
Groove, can equally be designed as within the interior outer peripheral edge of seal face in the usual way according to actual needs（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 at the same time in structure
Title type double rotational directions groove.
On the basis of said structure sealing ring, the express pump step-up gear of the utility model is close with non-contact zero leakage
Seal apparatus, is on the basis of with conventional structure, i.e., has stationary ring and rotating ring that coaxial line is oppositely arranged in structure, its
Opposite end face is seal face, and elastic construction of the stationary ring therein through axially setting is supported in stationary seat, rotating ring with
Transmission of rotary axis connects.Wherein, the stationary ring or rotating ring, using the close of such as the utility model said structure form
Seal ring, the radially inner side of sealing ring keep communicating with air.
As can be seen that the sealing ring of the non-contact zero leakage of the utility model said structure, both close different from tradition machinery
Envelope, also different from dry gas seals, but has merged a kind of improved sealing ring of design concept both it.By end face broad-ruler
On the basis of very little appropriateness is widened, the setting position of its fluid dynamic pressure groove employs the mode opposite with traditional seal ring of dry gas, if
Put 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, quiet
During state condition, under elastic construction effect of the sealing device in stationary ring unit, the seal face of activity-inertia sealing interannular mutually pastes
Close, prevent oil leak；In high-speed cruising state, seal face radial outside（Seal upstream）Lubricating oil by it
Pressure acts on, equally can be radially from the outside of seal face to inward side to leakage, its leak pressure with tradition machinery sealing
Gradually reduced along the radial direction of seal face；The seal face radially inner side communicated with air（Seal downstream）Air, then may be used
It is pumped through the fluid dynamic pressure groove opposite with the direction of rotation of sealing ring into fluid dynamic pressure groove and reverse supercharging, its pressure is from sealing
End face Inside To Outside makes the seal face of static-dynamic ring be separated and realize non-contact operation along radially constantly increasing.
The working status of seal face is at this time：It is reverse by what is entered on the inside of seal face in the appropriate area among seal face
The gas pressure of supercharging, the pressure of the lubricating oil with being leaked from seal face radial outside is just equal, realizes lubricating oil not
It is further continued for largely to internal leakage, the air being redirected back into will not continue the dynamic equilibrium being largely outwardly into.Therefore, compared to
Existing contacting mechanical seal, the utility model said structure form sealing ring can shut out when realizing non-contact operating
Absolutely while directly abrasion occurs for seal face and blister occurs, the zero leakage of lubricating oil or atomic leakage can be also realized,
So as to greatly extend the service life of sealing.
Below in conjunction with the embodiment by attached drawing illustrated embodiment, the above of the utility model is remake into one
The detailed description of step.But the scope that this should not be interpreted as to the above-mentioned theme of the utility model is only limitted to following example.Do not taking off
In the case of the above-mentioned technological thought of the utility model, the various replacements made according to ordinary skill knowledge and customary means
Or change, it should all be included in the scope of the utility model.
Brief description of the drawings
Fig. 1 is a kind of structure diagram of the sealing ring of the non-contact zero leakage of single rotation direction of the utility model.
Fig. 2 is a kind of structure diagram of the sealing ring of the non-contact zero leakage of double rotational directions of the utility model.
Fig. 3 is a kind of structure diagram of non-contact zero leakage sealing device of the utility model.
Embodiment
Shown in Fig. 1 is a kind of basic structure of single rotation direction sealing ring of non-contact zero leakage of the utility model.Close
The fluid dynamic pressure groove 3 less than transverse plane is provided with the seal face 2 of seal ring 1.The fluid dynamic pressure groove 3 is to be arranged on seal face
In the radially inner side position that can be communicated with air in and the trend on seal face from radially inner side to radial outside with it is close
The opposite single rotation direction groove in the direction of rotation of seal ring.The concrete form of single rotation direction groove, can according to actual needs, by current normal
Rule mode designs.Wherein, the both ends of its fluid dynamic pressure groove 3 are located within the interior outer peripheral edge of seal face respectively except as shown in Figure 1
Non-penetrating form outside, can also use its radially inner side end 4 is 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 utility model shown in Fig. 2.The stream
Body dynamic pressure groove 3 is arranged in the radially inner side position that can be communicated with air in seal face, is had and is sealed at the same time in structure
The identical and opposite two-part structure in ring direction of rotation.
Fig. 3 is a kind of horizontal high-speed pump the step-up gear non-contact zero leakage sealing device, structure of the utility model
In there is the coaxial line stationary ring 12 and rotating ring 11 that are oppositely arranged, its opposite end face is seal face, stationary ring therein
12 elastic constructions 9 and throw-out collar 8 through axially setting are supported in stationary seat 7, and rotating ring 11 is sequentially connected with rotation axis 10, it is special
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 stationary 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 the 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 the 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 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 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 the fluid dynamic pressure groove（）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 at the same time within outer peripheral edge, and in structure
Groove.
6. the non-contact zero leakage sealing device of express pump step-up gear, has the stationary ring that coaxial line is oppositely arranged（12）With
Rotating ring（11）, its opposite end face is seal face, stationary ring therein（12）Elastic construction through axially setting（9）Supporting
In stationary seat（7）It is interior, rotating ring（11）With rotation axis（10）It is sequentially connected, it is characterized in that the 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 is communicated with air.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721030744.3U CN207333648U (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 |
|---|---|---|---|
| CN201721030744.3U CN207333648U (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 |
|---|---|
| CN207333648U true CN207333648U (en) | 2018-05-08 |
Family
ID=62373739
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721030744.3U Active CN207333648U (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) | CN207333648U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107355530A (en) * | 2017-08-17 | 2017-11-17 | 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 |
| CN108799444A (en) * | 2018-08-30 | 2018-11-13 | 浙江工业大学 | Planetary differential radial double mechanical seal |
| CN110056535A (en) * | 2019-05-27 | 2019-07-26 | 新乡市中机工业有限公司 | A kind of water pump wear resistant corrosion resistant choma device |
-
2017
- 2017-08-17 CN CN201721030744.3U patent/CN207333648U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107355530A (en) * | 2017-08-17 | 2017-11-17 | 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 |
| CN108799444A (en) * | 2018-08-30 | 2018-11-13 | 浙江工业大学 | Planetary differential radial double mechanical seal |
| CN108799444B (en) * | 2018-08-30 | 2024-03-26 | 浙江工业大学 | Planetary differential radial double-end-face mechanical seal |
| CN110056535A (en) * | 2019-05-27 | 2019-07-26 | 新乡市中机工业有限公司 | A kind of water pump wear resistant corrosion resistant choma device |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 610045 Sichuan city of Chengdu province Wuhou District Vuko Xisi Road No. 8 Patentee after: Zhongmi Holding Co., Ltd Address before: 610045 Sichuan city of Chengdu province Wuhou District Vuko Xisi Road No. 8 Patentee before: SICHUAN SUNNY SEAL Co.,Ltd. |