CN205559791U - Two Y type groove terminal surface mechanical seal structure of symmetric distribution - Google Patents
Two Y type groove terminal surface mechanical seal structure of symmetric distribution Download PDFInfo
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- CN205559791U CN205559791U CN201620221739.XU CN201620221739U CN205559791U CN 205559791 U CN205559791 U CN 205559791U CN 201620221739 U CN201620221739 U CN 201620221739U CN 205559791 U CN205559791 U CN 205559791U
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- radius
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- shaped groove
- groove
- backflash
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Abstract
The utility model relates to a mechanical seal technical field, concretely relates to two Y type groove terminal surface mechanical seal structure of symmetric distribution. The friction is vice to comprise two sealing rings, rotating ring and quiet ring promptly, set up a plurality of two Y type bank of cells that distribute along circumference in rotating ring and the quiet ring on one of them sealing ring, sealing ring external diameter department is medium high -pressure side, the upper reaches promptly, every bank of cells contains two Y type grooves that a pair of symmetry distributes, every two Y type groove contains a drainage groove and two counter -flow vats, the counter -flow vat be located the drainage groove the dorsal part and the drainage groove be linked together, it is sealed weir not slot the region between two Y type grooves, and the regional clitellum that forms is not slotted to circumference is sealed dam, the sealed dam of internal diameter department is the low tension side, promptly low reaches. The utility model discloses can realize mechanical seal's two -way rotation function to the leakage quantity that lets out of sealing medium can be reduced, the sealed of rotating machinery such as various pumps, reation kettle, agitator can be be applied to.
Description
Technical field
This utility model relates to technical field of mechanical, is specifically related to a kind of symmetrical double
Y type groove end surface mechanical sealing structure.
Background technology
Liquid film seal is the high-new Sealing Technology of a kind of long-life, low energy consumption, it is adaptable to oil
In the industries such as work, light industry, power, atomic energy, the axle envelope of various rotating machineries, prevents technique to be situated between
Matter the most easily vaporizes, the leakage in air such as high risk, high pollution medium.Liquid film
Seal by offer on sealing ring end face the degree of depth reach micron-sized grooved produce static pressure and
Dynamic pressure effect, makes to produce between dynamic and static ring end face the fluid film that a layer thickness is very thin, so that dynamic
Stationary ring end face keeps released state, it is achieved the sealing of medium, wherein helicla flute pumping machinery
Seal typical case the most.At present, the various grooved of sealing ring end face is gradually exploited, such as patent
CN101975274A, CN204187000U, CN204127319U etc., expand liquid film close
It is enclosed in industrial range of application.But, under special operation condition, the such as rotation of tank motor
The sealing of axle head, it is desirable to mechanical seal is possible not only to realize bidirectional rotation function, and averagely lets out
Leakage quantity need to meet certain requirement.But there is anti-interference energy in the liquid film seal of existing end face grooved
Power is poor, low cruise stability is the best, leakage rate big, be not suitable for the problems such as bidirectional rotation, difficult
To meet the service requirement under special operation condition.
Utility model content
In order to overcome above-mentioned deficiency present in the liquid film seal technology of existing end face grooved, this reality
With novel propose a kind of capacity of resisting disturbance preferably, low cruise good stability, cooling effect good,
The symmetrical double-Y shaped groove mechanical end face that leakage rate is less, can realize bidirectional rotation is close
Seal structure.
The technical solution of the utility model is:
A kind of symmetrical double-Y shaped groove end surface mechanical sealing structure, friction pair is close by two
Seal ring form, i.e. rotating ring and stationary ring, it is characterised in that: in described rotating ring and stationary ring one of them
Multiple circumferentially distributed double-Y shaped groove group, described sealing ring outer radius is offered on sealing ring
It is medium high-pressure side, i.e. upstream；Described each groove group comprise a pair symmetrical double-Y shaped
Groove, described each double-Y shaped groove comprises a drainage trough and two backflashes, described backflash
It is positioned at the dorsal part of drainage trough and is connected with drainage trough；Unslotted district between described double-Y shaped groove
Territory is to seal weir, and the annulus that circumference unslotted region is formed is to seal dam, and described inner radius seals
Dam is low-pressure side, i.e. downstream.
Further, the sidewall molded line of described drainage trough and backflash be helix or circular arc line or
Person's straight line.
Further, described sealing ring inside radius is Ri, double-Y shaped groove downstream part groove root radius Rg1,
And Ri<Rg1；Described sealing ring outer radius is Ro, double-Y shaped groove upstream end groove root radius Rg2,
And Rg2≤Ro。
Further, described drainage trough and degree of depth h=3 of backflash～25 μm.
Further, the span of described double-Y shaped groove number N is: 4≤N≤24, preferably
Value scope is 6≤N≤18, and wherein N is even number.
Further, one of them backflash groove root radius described is R1, and Rg1≤R1<Rg2；
Another backflash groove root radius described is R2, and R1≤R2<Rg2。
Further, described double-Y shaped groove downstream part groove root radius Rg1With sealing ring inside radius Ri
Difference R3=Rg1-Ri, sealing ring outer radius RoWith inside radius RiDifference R=Ro-Ri, described
R3The span of/R is 0.1～0.5, and preferred value scope is 0.2～0.4.
Further, described drainage trough and backflash deep equality and do not change with the change of radius.
Operation principle of the present utility model:
When the sealing ring offering symmetrical double-Y shaped groove rotates in the direction of the clock, draw
5 upstream high pressure fluid of chute pump between seal face under the effect of viscous shear, under
At trip groove root, fluid pressure drastically raises, because end face mould increases the opening force formed more than making
The closing force being used on sealing ring, forces the both ends of the surface under static state keeping contact to separate also
It is in stable contactless state.Under the effect of hydrodynamic and inertia force, backflash 2 He
The segment fluid flow reverse pumping of 3 drainage troughs 5, to high-pressure side, reduces the vent flow of sealing medium.And
For the double-Y shaped groove that in same groove group, another is symmetrical, two backflashes play pumping
Effect, drainage trough then plays reverse pumping fluid matasomatism.By double Y symmetrical in same groove group
The synergism of type groove, it is achieved the sealing of high-pressure medium and the bidirectional rotation function of mechanical seal.
Advantage of the present utility model and beneficial effect:
(1) symmetrical double-Y shaped groove end surface mechanical sealing structure is applicable not only to unidirectional rotation
The machinery turned, and it is applicable to bidirectional rotation machinery.
(2) high pressure formed at drainage trough and backflash groove root has synergistic effect, it is easy to end
The unlatching in face, improves end face bearing capacity, reduces the end wear in shutdown process；Increase
Fluid film rigidity, improves the capacity of resisting disturbance of liquid film seal.
(3) under the effect of hydrodynamic and inertia force, groove internal shunt body is paramount by reverse pumping
Pressure side, thus decrease the leakage of medium between seal face.
Accompanying drawing explanation
Fig. 1 is that the symmetrical double-Y shaped groove end face structure of this utility model embodiment one shows
It is intended to.
Fig. 2 is the symmetrical double-Y shaped groove end face geometry knot of this utility model embodiment one
Structure parameter definition schematic diagram.
Fig. 3 is the fluting end face structure schematic diagram of this utility model embodiment two.
Fig. 4 is the fluting end face structure schematic diagram of this utility model embodiment three.
Fig. 5 is the fluting end face structure schematic diagram of this utility model embodiment four.
Fig. 6 is the fluting end face structure schematic diagram of this utility model embodiment five.
Detailed description of the invention
Technical scheme for making this utility model embodiment is clearer, below in conjunction with the accompanying drawings to this
The enforcement of utility model is described in further detail.
Embodiment one
See Fig. 1 and Fig. 2, a kind of symmetrical double-Y shaped groove end surface mechanical sealing structure,
Friction pair is made up of two sealing rings, i.e. rotating ring and stationary ring, in described rotating ring and stationary ring wherein one
Multiple circumferentially distributed double-Y shaped groove group 1, described sealing ring external diameter is offered on individual sealing ring
Place is medium high-pressure side, i.e. upstream；Described each groove group comprises a pair symmetrical double Y
Type groove, described each double-Y shaped groove comprises a drainage trough 5 and backflash 2 and 3, described time
Chute 2 is positioned at the dorsal part of drainage trough 5 and is connected with drainage trough 5 with 3；Described double-Y shaped
Between groove, unslotted region is to seal weir 6, and the annulus that circumference unslotted region is formed is to seal dam
4, it is low-pressure side that described inner radius seals dam, i.e. downstream.
The sidewall molded line of described drainage trough and backflash is helix or circular arc line or straight line.
Described sealing ring inside radius is Ri, double-Y shaped groove downstream part groove root radius Rg1, and
Ri<Rg1；Described sealing ring outer radius is Ro, double-Y shaped groove upstream end groove root radius Rg2, and
And Rg2<Ro。
Degree of depth h=3 of described drainage trough 5 and backflash 2 and 3～25 μm.
The span of described double-Y shaped groove number N is: 4≤N≤24, preferred value scope is
6≤N≤18, wherein N is even number.
The groove root radius of described backflash 2 is R1, and Rg1<R1<Rg2；Described backflash 3
Groove root radius be R2, and R1<R2<Rg2。
Described double-Y shaped groove downstream part groove root radius Rg1With sealing ring inside radius RiDifference R3=
Rg1-Ri, sealing ring outer radius RoWith inside radius RiDifference R=Ro-Ri, described R3/ R takes
Value scope is 0.1～0.5, and preferred value scope is 0.2～0.4.
Described drainage trough 5 and backflash 2 and 3 deep equality and do not change with the change of radius.
For different fluid media (medium)s, operating condition and aid system operating parameter, by optimizing
Design the ginsengs such as the backflash groove root radius of symmetrical double-Y shaped groove, double-Y shaped groove quantity N
Number, can meet the requirement of different working condition lower seal performance.
Embodiment two
Seeing Fig. 3, the present embodiment is double-Y shaped groove upstream end with the difference of embodiment one
Groove root radius Rg2=Ro, i.e. drainage trough and backflash is opened in sealing ring outer radius, remaining structure
Identical with embodiment one with embodiment.
Embodiment three
The difference seeing Fig. 4, the present embodiment and embodiment one is the groove root of backflash 2
Radius R1=Rg1, i.e. the groove root radius of backflash 2 is equal to double-Y shaped groove downstream part groove root radius,
Remaining structure is identical with embodiment one with embodiment.
Embodiment four
The difference seeing Fig. 5, the present embodiment and embodiment one is the groove root of backflash 3
Radius R2=R1, i.e. the groove root radius of backflash 3 is equal to the groove root radius of backflash 2, remaining
Structure is identical with embodiment one with embodiment.
Embodiment five
The difference seeing Fig. 6, the present embodiment and embodiment one is the groove root of backflash 3
Radius R2=R1, i.e. the groove root radius of backflash 3 and backflash 2 is equal；Extend backflow afterwards
The groove root radius of groove 2 is equal to double-Y shaped groove downstream part groove root radius, remaining structure and embodiment party
Formula is identical with embodiment one.
Content described in this specification embodiment is only the way of realization to utility model design
Enumerate, protection domain of the present utility model is not construed as being only limitted to what embodiment was stated
Concrete form, protection domain of the present utility model is also and in those skilled in the art according to this practicality
The thinkable equivalent technology means of novel design.
Claims (8)
1. a symmetrical double-Y shaped groove end surface mechanical sealing structure, friction pair is made up of two sealing rings, i.e. rotating ring and stationary ring, it is characterized in that: described rotating ring and stationary ring offer on one of them sealing ring multiple circumferentially distributed double-Y shaped groove group, described sealing ring outer radius is medium high-pressure side, i.e. upstream；Described each groove group comprises a pair symmetrical double-Y shaped groove, and described each double-Y shaped groove comprises a drainage trough and two backflashes, and described backflash is positioned at the dorsal part of drainage trough and is connected with drainage trough；Between described double-Y shaped groove, unslotted region is to seal weir, and the annulus that circumference unslotted region is formed is to seal dam, and it is low-pressure side that inner radius seals dam, i.e. downstream.
Sealing structure the most according to claim 1, it is characterised in that: the sidewall molded line of described drainage trough and backflash is helix or circular arc line or straight line.
Sealing structure the most according to claim 1, it is characterised in that: described sealing ring inside radius is Ri, double-Y shaped groove downstream part groove root radius Rg1, and Ri<Rg1；Described sealing ring outer radius is Ro, double-Y shaped groove upstream end groove root radius Rg2, and Rg2≤Ro。
Sealing structure the most according to claim 2, it is characterised in that: described drainage trough and degree of depth h=3 of backflash～25 μm.
Sealing structure the most according to claim 3, it is characterised in that: the span of described double-Y shaped groove number N is: 4≤N≤24, wherein N is even number.
Sealing structure the most according to claim 4, it is characterised in that: one of them backflash groove root radius described is R1, and Rg1≤R1<Rg2；Another backflash groove root radius described is R2, and R1≤R2<Rg2。
Sealing structure the most according to claim 5, it is characterised in that: described double-Y shaped groove downstream part groove root radius Rg1With sealing ring inside radius RiDifference R3=Rg1-Ri, sealing ring outer radius RoWith inside radius RiDifference R=Ro-Ri, described R3The span of/R is 0.1～0.5.
Sealing structure the most according to claim 6, it is characterised in that: described drainage trough and backflash deep equality and do not change with the change of radius.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620221739.XU CN205559791U (en) | 2016-03-22 | 2016-03-22 | Two Y type groove terminal surface mechanical seal structure of symmetric distribution |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620221739.XU CN205559791U (en) | 2016-03-22 | 2016-03-22 | Two Y type groove terminal surface mechanical seal structure of symmetric distribution |
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| Publication Number | Publication Date |
|---|---|
| CN205559791U true CN205559791U (en) | 2016-09-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620221739.XU Expired - Fee Related CN205559791U (en) | 2016-03-22 | 2016-03-22 | Two Y type groove terminal surface mechanical seal structure of symmetric distribution |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108825788A (en) * | 2018-07-19 | 2018-11-16 | 天津科技大学 | Mechanical sealing end face structure |
| 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 |
-
2016
- 2016-03-22 CN CN201620221739.XU patent/CN205559791U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108825788A (en) * | 2018-07-19 | 2018-11-16 | 天津科技大学 | Mechanical sealing end face structure |
| 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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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160907 Termination date: 20170322 |