CN201521638U - Double-row inclined directional microporous end surface no leakage mechanical seal structure - Google Patents
Double-row inclined directional microporous end surface no leakage mechanical seal structure Download PDFInfo
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- CN201521638U CN201521638U CN2009201988906U CN200920198890U CN201521638U CN 201521638 U CN201521638 U CN 201521638U CN 2009201988906 U CN2009201988906 U CN 2009201988906U CN 200920198890 U CN200920198890 U CN 200920198890U CN 201521638 U CN201521638 U CN 201521638U
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- micropore
- ring
- end surface
- endless belt
- microporous
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Abstract
A double-row inclined directional microporous end surface no leakage mechanical seal structure comprises a rotating ring and a stationary ring of the mechanical seal; one side of the end surface of the rotating ring and one side of the end surface of the stationary ring are high-voltage sides ( upstream), and the other side of the end surface of the rotating ring and the other side of the end surface of the stationary ring are low-voltage sides ( downstream); outer microporous ring ribbons and inner microporous ring ribbons are formed on the end surfaces of the rotating ring and the stationary ring; the inclined angles of the microporous major axes of the outer microporous ring ribbon and the inner microporous ring ribbon are opposite to that of the diameter of a seal end surface passing through the center of the micropore; the outer microporous ring ribbon and the inner microporous ring ribbon are respectively arranged upstream and downstream the end surface ; and a continuous ring seal dam is arranged between the outer microporous ring ribbon and the inner microporous ring ribbon and downstream the inner microporous ring ribbon. The utility model has the benefits of no contact, wear resistance, zero-leakage sealing, prolongs the service life, and improves the sealing reliability.
Description
Technical field
The utility model patent relates to the end surface mechanical sealing structure design field, specifically is meant the double-row tilting directional microporous end surface no-leakage mechanical sealing structure, is applicable to the shaft end seal device of rotating machinery rotating shafts such as various compressors, pump and still stirrer.
Background technique
Mechanical seal is the main means that prevent that the rotary type fluid machine axle head from revealing, fast development along with industries such as petrochemical industry, require mechanical seal to develop to high parameter, requirement has higher stability and reliability and longer working life, and for poisonous, inflammable, its leakage rate of the strict control of explosion hazard gases.At present, the end pattern of having realized non-contacting mechanical seal mainly comprises one-way spiral groove, unidirectional herringbone spiral chute, unidirectional Y shape spiral chute, unidirectional L shaped spiral chute, unidirectional arc groove, two-way T-slot, two-way U-groove bevel, two-way tree-like groove etc., is widely used on the shaft end seal device of centrifugal compressor and the rotating shaft of pump class.But, above-mentioned mechanical seal generally all has startup or stopping performance is relatively poor or sealability is subjected to disturbance to be easy to occur unsettled phenomenon, and anti-solid particle is limited in one's ability, and the crystallization that can not be adapted to well easily vaporize, solid content is higher or occasion such as high operating parameter.For this reason, EtsionI. has invented a kind of many (little) hole end surface sealing applications at first in pump class I liquid I gland seal device.Have multinomial this type of patent at present both at home and abroad, but because the hydrodynamic effect of designed micropore is poor in the present patent, make the bearing capacity or the end face of mechanical seal fluid film keep non-contacting limited in one's ability, the contact wear of end face takes place easily, offset the anti-attrition advantage of micropore to a great extent, caused the start-stop weak effect, end face is easy to wear, working life is short, sealing is limited.
Summary of the invention
In order to overcome the anti-solid particle ability that seals in the prior art, the hydrodynamic effect is limited, make start and stop weak effect under the low pressure condition, working life is short, especially be applied to contain the medium of solid particle, gas medium and easy crystallization, easily vaporization and poisonous, when contaminativity waits medium by force, the deficiency of sealing reliability difference, the utility model provides a kind of medium that can be applied to various conditions, strengthened anti-solid particle ability, hydrodynamic effect and sealing, give full play to the anti-attrition advantage of microporous end surface, make that the sealing start and stop are effective, the reliability height, zero leakage, the double-row tilting directional microporous end surface no-leakage mechanical sealing structure that life-span is long.
The technical solution of the utility model:
A kind of double-row tilting directional microporous end surface no-leakage mechanical sealing structure, the rotating ring, the stationary ring that comprise mechanical seal, one side of the end face of described rotating ring and stationary ring is that the high pressure side is the upstream, the opposite side of the end face of described rotating ring and stationary ring is that low voltage side is the downstream, it is characterized in that: have outer, interior micropore endless belt on described rotating ring or the stationary ring end face, described micropore major axis outer, interior micropore endless belt is opposite with the angle of inclination direction of the seal face diameter that passes through this micropore center; Described outer, interior micropore endless belt is located at end face upstream and end face downstream respectively, and micropore endless belt downstream is equipped with a continuous ring packing dam between described outer, interior micropore endless belt and in described.
Further, described micropore is symmetrically distributed according to rotating center.
Further, described outer, interior micropore endless belt radially is evenly equipped with a plurality of micropores.
Further, the span of the major axis of described micropore and minor axis ratio is: 1～50; Described micropore minor axis length scope is: 10～1000 μ m; The described micropore degree of depth is 1～50 μ m; The area density scope of described micropore is: 0.05～0.5; The radial width scope on described sealing dam is: 0.1～10mm.
The shape of the micropore in the utility model can be regular figures such as ellipse, rectangular, rhombus, half elliptic, triangle, but must have tangible directivity.
Working principle of the present utility model:
Described micropore directivity tilts to make the pressure flow that is produced by the upstream high pressure after entering micropore, under tangential rotating speed cutting effect, part fluid will flow along the micropore long axis direction, and because the micropore long axis direction is greater than short-axis direction, the directivity that is micropore has increased the flow process of fluid in the micropore district, make fluid flow constantly accumulate along long axis direction, be subjected to continuous compression, pressure improves gradually, form tangible dynamic pressure effect, the opening force of each single hole is improved, and forms the fine motion indent, thereby has improved the dynamic pressure opening force of whole seal face.When low voltage starting, can separate the seal face friction pair fast, reduce the contact friction of seal face, obviously improve the start-stop effect.
Outer micropore endless belt can well stop solid particle to enter seal face, and after micro-particle entered end face, micropore can play the effect of receiving, and effectively brought into play the ability of the anti-solid particle of micropore, and the anti-attrition abrasive resistance improves.The true dip direction of interior micropore endless belt is opposite with outer micropore endless belt, not only can increase dynamic pressure effect, receive the particle by high pressure side micropore endless belt, and realize the upstream pumping of downstream fluid along the micropore true dip direction realizing zero leakage.
Therefore, sealing is particularly suitable for containing that concentration of solid particles is higher, inflammable, explosive, toxic gas, requires high reliability, zero leakage occasion.
The beneficial effects of the utility model mainly show: 1, the unique tilting directional microporous structure of biserial man type on the seal face, improved the hydrodynamic effect and the sealing of microporous end surface greatly, and make that start and stop are effective under the sealing low pressure condition; 2, liquid medium and gas medium can be applied to by the hole depth that micropore is set, the ability and the advantage of the anti-solid particle of micropore can be given full play to; 3, inboard reversed dip micropore endless belt has the pumping function, realizes the zero leakage of micropore sealing; 4, the hydrodynamic effect of Zeng Qianging has realized non-contact, wear-resistant, the zero leakage of sealing, has prolonged working life, has improved the reliability of sealing.
Description of drawings
Fig. 1 is an end-face structure schematic representation of the present utility model.
Fig. 2 is the microcellular structure enlarged view of outer micropore endless belt of the present utility model.
Fig. 3 is the microcellular structure enlarged view of interior micropore endless belt of the present utility model.
Fig. 4 is that structural representation is implemented in sealing of the present utility model.
Embodiment
With reference to Fig. 1-4, a kind of double-row tilting directional microporous end surface no-leakage mechanical sealing structure, the rotating ring 7, the stationary ring 8 that comprise mechanical seal, one side of the end face of described rotating ring 7 and stationary ring 8 is that the high pressure side is the upstream, the opposite side of the end face of described rotating ring 7 and stationary ring 8 is that low voltage side is the downstream, have outer, interior micropore endless belt 2,5 on described rotating ring 7 or stationary ring 8 end faces, described micropore 1,4 major axis 12,42 outer, interior micropore endless belt 2,5 are opposite with the angle of inclination direction of the seal face diameter 13,43 that passes through these micropore 1,4 centers; Described outer, interior micropore endless belt 2,5 is located at end face upstream and end face downstream respectively, described outer, 2,5 of interior micropore endless belt and described in micropore endless belt 5 downstreams be equipped with a continuous ring packing dam 3,6.
Described micropore 1,4 is symmetrically distributed according to rotating center.
Described outer, interior micropore endless belt 2,5 radially is evenly equipped with a plurality of micropores.
The major axis 12,42 of described micropore 1,4 and the span of minor axis 11,41 ratios are: 1～50; Described micropore 1,4 minor axises 11,41 length ranges are: 10～1000 μ m; Described micropore 1,4 degree of depth are 1～50 μ m; The area density scope of described micropore 1,4 is: 0.05～0.5; The radial width scope on described sealing dam 3,6 is: 0.1～10mm.
The shape of the micropore 1,4 in the utility model can be regular figures such as ellipse, rectangular, rhombus, half elliptic, triangle, but must have tangible directivity.
The described content of this specification embodiment only is enumerating the way of realization of model utility design; protection domain of the present utility model should not be regarded as only limiting to the concrete form that embodiment states, protection domain of the present utility model also reach in those skilled in the art according to the utility model design the equivalent technologies means that can expect.
Claims (4)
1. double-row tilting directional microporous end surface no-leakage mechanical sealing structure, the rotating ring, the stationary ring that comprise mechanical seal, one side of the end face of described rotating ring and stationary ring is that the high pressure side is the upstream, the opposite side of the end face of described rotating ring and stationary ring is that low voltage side is the downstream, it is characterized in that: have outer, interior micropore endless belt on described rotating ring or the stationary ring end face, described micropore major axis outer, interior micropore endless belt is opposite with the angle of inclination direction of the seal face diameter that passes through this micropore center; Described outer, interior micropore endless belt is located at end face upstream and end face downstream respectively, and micropore endless belt downstream is equipped with a continuous ring packing dam between described outer, interior micropore endless belt and in described.
2. double-row tilting directional microporous end surface no-leakage mechanical sealing structure according to claim 1 is characterized in that: described micropore is symmetrically distributed according to rotating center.
3. double-row tilting directional microporous end surface no-leakage mechanical sealing structure according to claim 1 and 2 is characterized in that: described outer, interior micropore endless belt radially is evenly equipped with a plurality of micropores.
4. double-row tilting directional microporous end surface no-leakage mechanical sealing structure according to claim 3 is characterized in that: the span of the major axis of described micropore and minor axis ratio is: 1～50; Described micropore minor axis length scope is: 10～1000 μ m; The described micropore degree of depth is 1～50 μ m; The area density scope of described micropore is: 0.05～0.5; The radial width scope on described sealing dam is: 0.1～10mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201988906U CN201521638U (en) | 2009-10-16 | 2009-10-16 | Double-row inclined directional microporous end surface no leakage mechanical seal structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201988906U CN201521638U (en) | 2009-10-16 | 2009-10-16 | Double-row inclined directional microporous end surface no leakage mechanical seal structure |
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| Publication Number | Publication Date |
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| CN201521638U true CN201521638U (en) | 2010-07-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201988906U Expired - Fee Related CN201521638U (en) | 2009-10-16 | 2009-10-16 | Double-row inclined directional microporous end surface no leakage mechanical seal structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101672364B (en) * | 2009-10-15 | 2013-06-05 | 浙江工业大学 | Double-row tilting directional microporous end surface no-leakage mechanical sealing structure |
-
2009
- 2009-10-16 CN CN2009201988906U patent/CN201521638U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101672364B (en) * | 2009-10-15 | 2013-06-05 | 浙江工业大学 | Double-row tilting directional microporous end surface no-leakage mechanical sealing structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100707 Termination date: 20131016 |