CN207178686U - Zero leakage pumping formula mechanical seal - Google Patents
Zero leakage pumping formula mechanical seal Download PDFInfo
- Publication number
- CN207178686U CN207178686U CN201721105313.9U CN201721105313U CN207178686U CN 207178686 U CN207178686 U CN 207178686U CN 201721105313 U CN201721105313 U CN 201721105313U CN 207178686 U CN207178686 U CN 207178686U
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- Prior art keywords
- pumping
- rotating ring
- groove
- ring
- face
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- Expired - Fee Related
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Abstract
The utility model discloses a kind of zero leakage pumping formula mechanical seal, including rotating ring, the exradius of the rotating ring is R, and the rotating ring internal bore radius of the rotating ring is R0, pumping groove is provided with the ring seal face of rotating ring, and the pumping groove behind pumping work face, pumping with pumping medial surface by surrounding, the outer side edges of the notch of pumping groove towards the rotating ring；The pumping work face is base radius R1=R0/ 2 involute surface, the basic circle and rotating ring endoporus are concentric circles；It is the involute surface that basic circle is circle where rotating ring endoporus behind the pumping；Radius of circle R where the pumping medial surface2=（R+R0）/2.The mechanical seal can not only produce higher upstream centrifugal pumping effect, make the zero leakage realized between dynamic and static ring separation seal face.
Description
Technical field
A kind of end-face seal device is the utility model is related to, more particularly to it is mechanical close with pumping function
Seal rotating ring.
Background technology
The end face seal that mechanical seal is a kind of direct contact friction by moving sealing ring and stationary seal ring to realize, tool
There is the characteristics of service life length, vibration strength specific diameter are to good seal；But it is in the severe complicated building ring such as high pressure, high speed and high temperature
Under border, the abrasion between sealing surface can constantly accelerate, and leakage rate is consequently increased, it is easy to form seal failure, therefore conventional
Mechanical seal it is difficult to ensure that under bad working environments long-term operation stability and reliability.
Chinese patent 201310201473.3 discloses a kind of pumping Hydrodynamic pressure type mechanical seal certainly, and it is close in rotating ring
The upstream in end-blocking face（High-pressure side）Helicla flute area is offered, the notch of circumferentially distributed helicla flute is towards upstream side, in stationary ring
End face sets in groove the axle of multiple annular seal spaces connections with respect to offering annular reservoir at rotating ring helicla flute root position
To drainage duct, it utilizes the fluid pressure differential of groove root, fluid is flowed back into sealed chamber again by the sluice way on stationary ring,
Have the function that the dynamic and static ring end face of separation, although this structure is realized by separating the generation of the hydrodynamic of dynamic and static end face
The non-contact seals of dynamic and static ring, reduce the fretting wear between dynamic and static ring, but still can not solve the problems, such as that slip is big.
Be primarily due to not make the groove profile of helicla flute in-depth study, be difficult to produce on high-tension side fluid during seal operation from
Heart pump action, the liquid film shear flow for sealing interannular are insufficiently resistant to pressure difference stream between internal-and external diameter, can not eliminate rotating ring and stationary ring
Between leakage；The sealing interannular of second structure can not form dynamic pressure effect, and the liquid film bearing capacity between sealing surface is extremely limited,
The contact friction of dynamic and static ring can be still produced in actual motion, influences the normal performance of seal face sealing property；This knot simultaneously
The sealing device of structure also has the defects of complicated, installation and debugging inconvenience.
Utility model content
For the above-mentioned deficiency present in prior art, technical problem to be solved in the utility model is to provide a kind of energy
Produce higher upstream centrifugal pumping effect and realize the zero leakage pumping formula mechanical seal of zero leakage.
In order to solve the above-mentioned technical problem, zero leakage pumping formula mechanical seal of the present utility model, including rotating ring, institute
The exradius for stating rotating ring is R, and the rotating ring internal bore radius of the rotating ring is R0, pumping groove is provided with the ring seal face of rotating ring,
The pumping groove behind pumping work face, pumping with pumping medial surface by surrounding, and the notch of pumping groove is towards the outside of the rotating ring
Side；The pumping work face is base radius R1=R0/ 2 involute surface, the basic circle and rotating ring endoporus are concentric circles；The pump
Send is below the involute surface of circle where rotating ring endoporus for basic circle；Radius of circle R where the pumping medial surface2=（R+R0）/2.
In said structure, due to being provided with pumping groove on the ring seal face of rotating ring, the pumping work face of the pumping groove
It is striping curved surface below with pumping, and pumping work face involute base radius is only the half for pumping basic circle below,
First using involute surface as pumping work face and pumping behind, so utilize involute on any normal with its basic circle
The characteristics of tangent so that upstream fluid is easier tangentially to be thrown away by centrifugation along involute, and has more on involute surface
Suitable fluid velocity distribution, so as to generate upstream（High-pressure side）Pumped liquid stream, efficient pumping effect is formed, is made
The liquid stream film pressure obtained between gradually seal ring seal face produced by line curved surface is more than high-pressure side flow stream pressure, is allowed to be enough to prevent high pressure
Side liquid stream is penetrated into sealing surface, so as to realize sealing effectiveness that leakage rate is zero；Furthermore the base radius in pumping work face is less than
The base radius of pumping below so that the flexibility in pumping work face is more than behind pumping face, on the one hand the groove of this pumping groove
Molded breadth degree radially becomes larger, and the formation of liquid stream film pressure and steady increase, ensure zero leakage more conducively between sealing surface
Sealing effectiveness, on the other hand work when liquid stream can be thrown away along behind the pumping of opposing straight, easily formed upstream fluid is oozed
The prevention pressure differential entered；Secondly the smooth smooth-going of involute surface, is easy to control, and is easy to make shaping.
Preferred embodiment of the present utility model, the notch of the pumping groove tilt to the opposite direction that rotating ring rotates.It is described
Pumping groove is uniformly distributed circumferentially on ring seal face, and the quantity of the pumping groove is 10-25.The groove depth of the pumping groove
h1=8um—15um.The pumping groove of the structure can realize more obvious pumping effect, it is ensured that the zero leakage between sealing surface.
Brief description of the drawings
The utility model zero leakage pumping formula mechanical seal is made into one with reference to the accompanying drawings and detailed description
Step describes in detail.
Fig. 1 is that the structure of rotating ring in a kind of embodiment of the utility model zero leakage pumping formula mechanical seal is shown
It is intended to；
Fig. 2 is A-A cross section views in Fig. 1 illustrated embodiments；
In figure, 1-pumping work face, 2-pumping groove, 3-pumping behind, 4-pumping medial surface, 5-ring seal
Face, 6-rotating ring endoporus, 7-pumping work face basic circle.
Embodiment
Zero leakage pumping formula mechanical seal of the present utility model, including rotating ring, the rotating ring with its ring seal face 5 with
The stationary seal ring face of stationary ring is bonded to each other and forms seal face.Pumping groove 2 in the utility model on rotating ring is added using laser
Work makes.
The rotating ring of zero leakage pumping formula mechanical seal as shown in Figure 1 and Figure 2, rotating ring structure in the form of annular discs, in plate-like
Rotating ring center be provided with rotating ring endoporus 6.Exradius R=30mm of rotating ring, the internal bore radius R of rotating ring endoporus 60=25mm。
12 pumping grooves it have been evenly distributed on the ring seal face 5 of rotating ring, pumping groove 2 is by pumping work face 1, pumping 3 and below
Pumping inner side 4 surrounds, and the notch of pumping groove 2 is towards the outer side edges of rotating ring, and the outer side edges are that high-pressure side is on sealing surface during work
Trip；The side of rotating ring endoporus 6 is then sealing surface downstream.The notch direction of pumping groove 2 tilts towards the rotation opposite direction of rotating ring, in figure
Rotating ring is rotated clockwise, then the notch direction of pumping groove counterclockwise tilts.Pumping work face 1 is that an involute is bent
Face, the involute are basic circle with pumping work face basic circle 7, base radius R1=R0/2.R in the present embodiment0=25mm, then pump
The radius R of working face basic circle 171=12.5mm, the involute basic circle and rotating ring endoporus 6 are concentric circles.Pumping is below 3 also for one gradually
Burst at the seams curved surface, and the basic circle of the involute is the circle where rotating ring endoporus 6, and the involute base radius is R0=25mm.Each pumping groove
12 pumping medial surface 4 is on same circle, the radius R of the circle2=（R+R0）/2=27.5mm.The groove depth h of pumping groove 21=
10um, the pumping work face 1 of pumping groove 2 and pumping 3 are each perpendicular to groove bottom below, and the groove bottom is equal with ring seal face 5
OK.
It is above-mentioned to have enumerated some preferred embodiments of the present utility model, but the utility model is not limited to this, is also permitted
More improvement and expansion.The quantity of pumping groove 2 is not limited to 12, can select to determine in 10-25, the groove depth of pumping groove
h110um is also not necessarily limited to, can be selected to determine h in 8um -15um according to the use environment and physical dimension of dynamic and static ring1Size,
As long as therefore each fallen within using the moving sealing ring of involute surface in scope of protection of the utility model.
Claims (4)
1. a kind of zero leakage pumping formula mechanical seal, including rotating ring, it is characterised in that：The exradius of the rotating ring is R,
The rotating ring endoporus of the rotating ring（6）Radius is R0, the ring seal face of rotating ring（5）On be provided with pumping groove（2）, the pumping groove（2）
By pumping work face（1）, behind pumping（3）With pumping medial surface（4）Surround, pumping groove（2）Notch towards the rotating ring
Outer side edges；The pumping work face（1）For base radius R1=R0/ 2 involute surface, the basic circle and rotating ring endoporus（6）To be same
The heart is justified；Behind the pumping（3）It is rotating ring endoporus for basic circle（6）The involute surface of place circle；The pumping medial surface（4）Institute
In radius of circle R2=（R+R0）/2.
2. zero leakage pumping formula mechanical seal according to claim 1, it is characterised in that：The pumping groove（2）'s
Notch tilts to the opposite direction that rotating ring rotates.
3. zero leakage pumping formula mechanical seal according to claim 1, it is characterised in that：The pumping groove（2）
Ring seal face（5）On be uniformly distributed circumferentially, the pumping groove（2）Quantity be 10-25.
4. the zero leakage pumping formula mechanical seal according to claim 1,2 or 3, it is characterised in that：The pumping groove
（2）Groove depth h1=8um—15um。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721105313.9U CN207178686U (en) | 2017-08-31 | 2017-08-31 | Zero leakage pumping formula mechanical seal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721105313.9U CN207178686U (en) | 2017-08-31 | 2017-08-31 | Zero leakage pumping formula mechanical seal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207178686U true CN207178686U (en) | 2018-04-03 |
Family
ID=61739718
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721105313.9U Expired - Fee Related CN207178686U (en) | 2017-08-31 | 2017-08-31 | Zero leakage pumping formula mechanical seal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207178686U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108757546A (en) * | 2018-05-02 | 2018-11-06 | 江苏大学 | A kind of centrifugal pump radial seal ring with plate guide vane |
| CN108869384A (en) * | 2018-05-02 | 2018-11-23 | 江苏大学 | A kind of centrifugal pump radial seal ring with cylindrical type guide vane |
-
2017
- 2017-08-31 CN CN201721105313.9U patent/CN207178686U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108757546A (en) * | 2018-05-02 | 2018-11-06 | 江苏大学 | A kind of centrifugal pump radial seal ring with plate guide vane |
| CN108869384A (en) * | 2018-05-02 | 2018-11-23 | 江苏大学 | A kind of centrifugal pump radial seal ring with cylindrical type guide vane |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180403 Termination date: 20180831 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |