CN102022548B - Mechanical seal structure of spike-shaped distribution microporous end surface - Google Patents
Mechanical seal structure of spike-shaped distribution microporous end surface Download PDFInfo
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- CN102022548B CN102022548B CN 201010583081 CN201010583081A CN102022548B CN 102022548 B CN102022548 B CN 102022548B CN 201010583081 CN201010583081 CN 201010583081 CN 201010583081 A CN201010583081 A CN 201010583081A CN 102022548 B CN102022548 B CN 102022548B
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Abstract
The invention provides a mechanical seal structure of a spike-shaped distribution microporous end surface, comprising a moving ring and a static ring which are mechanically sealed, wherein the one side of the end surface of the moving ring and one side of the end surface of the static ring are high pressure sides, namely upstream; the other side of the end surface of the moving ring and the other side of the end surface of the static ring are low pressure sides, namely downstream; at least one end surface of the moving ring or static ring is provided with a group of spike-shaped micropores which are symmetrically distributed based on a rotation center and composed of inclined hydrodynamic micropores and nondirectional decompressed micropores, wherein the decompressed micropores are arranged at the tail ends of the hydrodynamic micropores; the spike-shaped micropore group forms a ring belt which is arranged on the upstream of the end surface; and the downstream of the ring belt is provided with an annular seal dam with a smooth plane. The mechanical seal structure has the beneficial effects that seal disturbance-resistant capability and stability are improved by controlling fluid hydrodynamic effect of the microporous end surface and increasing damp; the capability and advantage that micropores can prevent solid particles can be fully performed; and the fluid hydrodynamic effect and disturbance resistivity are enhanced so that noncontact stability and wear resistivity of seal are improved, the service life is prolonged, and the reliability of the seal is improved.
Description
Technical field
The invention belongs to the mechanical end face seal technical field, particularly be applicable to the shaft end seal device of the rotating machinery rotating shafts such as various compressors, pump and still, relate in particular to a kind of fringe shape microporous end surface mechanical sealing structure of arranging.
Background technique
Because the peculiar advantage of surface texture technology aspect surperficial antifriction, the application of having succeeded in mechanical seal, engineering practice show wear resistance and the working life that the anti-friction wear-resistant effect of surface micro-structure can the Effective Raise seal face.Particularly in easily vaporization crystallization, solid content is higher or the occasion such as high operating parameter, the micropore enclosed watch reveals good tribological property, the research of micropore sealing and using is subject to people's attention day by day.
Invented at first a kind of many (little) hole end surface sealing applications in pump class I liquid I gland seal device from Etsion I., open the problem of ability for improving microporous end surface dynamic pressure in dry gas seals and low speed operating mode, variation cloth micropore, spiral chute assistant micropore, the multiple micropore seal face structure such as directional microporous have appearred both at home and abroad successively, the unlatching ability of Effective Raise microporous end surface, the anti-solid particle ability that can take full advantage of microcellular structure prolongs the working life of seal face.But dynamic pressure unlatching ability easily causes the antijamming capability variation of fluid-encapsulated film when improving, particularly be prone to contact wear in high rotating speed operating mode lower end surface, has offset to a great extent the anti-attrition advantage of micropore, reliability and the working life of impact sealing.
Summary of the invention
In order to overcome the deficiency of the high speed poor anti jamming capability that seals in the prior art, the invention provides a kind of medium that can be applied to various conditions, improve the servo-actuated property of microporous end surface, reduce the contact wear of end face, give full play to the anti-attrition advantage of microporous end surface, so that the sealing anti-jamming effectiveness is good, but frequent starting, reliability is high, the fringe shape of the long service life microporous end surface mechanical sealing structure of arranging.
Technological scheme of the present invention is:
A kind of fringe shape microporous end surface mechanical sealing structure of arranging, the rotating ring that comprises mechanical seal, stationary ring, 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 at least one end face of described rotating ring or stationary ring according to the symmetrical fringe shape micropore group that is formed by tilting dynamic pressure micropore and directionless decompression micropore of rotating center, described decompression micropore is located at the end of dynamic pressure micropore, described fringe shape micropore group consists of endless belt, described endless belt is located at the end face upstream, and the downstream of described endless belt is provided with the ring packing dam of smooth flat.
Further, described endless belt radially is provided with a plurality of fringe shape micropore groups.
Perhaps, described endless belt is along being provided with a plurality of fringe shape micropore groups with the direction that radially is in the tilted angle.
Further, described dynamic pressure micropore is directivity dynamic pressure micropore, and the ratio of its major axis and minor axis is greater than 1, and described major axis becomes the angle of inclination with seal face diameter by dynamic pressure micropore center.
Further, described dynamic pressure micropore degree of depth span is 2 ~ 10 μ m; The ratio span of the major axis of described dynamic pressure micropore and minor axis is 1 ~ 10; The minor axis span of described dynamic pressure micropore is 10～1000 μ m.
Further, the radial width scope on described ring packing dam is 0.1～10 mm.
Dynamic pressure micropore of the present invention is directional microporous, and the shape of micropore can be the regular figures such as ellipse, rectangular, rhombus; The shape of described decompression micropore can be the regular figures such as circle, square, Hexagon.
Working principle of the present invention:
Making the radial fluid resistance reduce to cause sealing the upstream high pressure after dynamic pressure micropore in the fringe shape micropore group tilts under the speed shear action moves and forms the dynamic pressure opening force to low voltage side, form miniature dynamic pressure groove, thereby improved the dynamic pressure opening force of whole seal face, its power is decided by pore size and angle of inclination, and whole fringe shape distribution micropore group can further be passed through direct fluid improved effect unseal performance.When fluid was continuing to enter the decompression micropore under the shear action after, because fluid displacement increases suddenly, pressure sharply reduced, thereby the high pressure of dynamic pressure micropore is suppressed.When low voltage starting, can separate fast the seal face friction pair, under high-speed condition, the rigidity of controllable flow body film improves the stability of fluid film.The seal clearance size mutation effect of the hole depth of micropore and the larger formation of aperture ratio produces eddy current so that flow to the fluid of micropore in the fringe shape micropore group simultaneously, enlarge markedly the damping of seal face fluid film, reduce the sealing vibration, further strengthen the stability of high speed lower seal, reduce the contact friction of seal face.
Fringe shape micropore group is located at the end face upstream, it is the high pressure side, can well stop solid particle to enter seal face, when having after micro-particle enters end face, micropore can play the effect of receiving, effectively bring into play the ability of the anti-solid particle of micropore, the anti-attrition abrasive resistance improves, and makes sealing can be applied to contain the higher occasion of concentration of solid particles.Simultaneously, distinctive tilting dynamic pressure micropore improves hydrodynamic effect between end face greatly, provides the maintenance end face non-contacting maximum capacity, has increased the axial rigidity of sealing, and when speed is too high, but decompression micropore establishment fluid film rigidity.The damping effect of micropore significantly reduces the sealing vibration in the fringe shape micropore group, strengthened the Ability of Resisting Disturbance of seal face, thereby made the antijamming capability of sealing or startup or stopping performance stable and under the low pressure condition be better than the mechanical seal of general spiral chute hydrodynamic.
Beneficial effect of the present invention is mainly manifested in: the tilting dynamic pressure microcellular structure of uniqueness and decompression micropore on l, the seal face, can control hydrodynamic effect, the increase damping of microporous end surface, and improved sealing Ability of Resisting Disturbance and stability; 2, liquid medium and gas medium can be applied to by the hole depth that micropore is set, ability and the advantage of the anti-solid particle of micropore can be given full play to; 3, it is stable, wear-resistant that the hydrodynamic effect that strengthens and disturbance rejection have improved the non-contact that seals, and prolonged working life, improved the reliability of sealing.
Description of drawings
Fig. 1 is one embodiment of the present invention end-face structure schematic diagram.
Fig. 2 is the enlarged view of A part among Fig. 1.
Fig. 3 is longitudinal sectional view of the present invention.
Fig. 4 is another embodiment of the invention end-face structure schematic diagram.
Embodiment
Embodiment one
With reference to Fig. 1-3, a kind of fringe shape microporous end surface mechanical sealing structure of arranging, the rotating ring 4 that comprises mechanical seal, stationary ring 3, one side of the end face of described rotating ring 4 and stationary ring 3 is that the high pressure side is the upstream, the opposite side of the end face of described rotating ring 4 and stationary ring 3 is that low voltage side is the downstream, have on described stationary ring 3 end faces according to the symmetrical fringe shape micropore group that is formed by tilting dynamic pressure micropore 11 and directionless decompression micropore 12 of rotating center, described decompression micropore 12 is located at the end of dynamic pressure micropore 11, described fringe shape micropore group 1 consists of endless belt, described endless belt is located at the end face upstream, and the downstream of described endless belt is provided with the ring packing dam of smooth flat.
Described endless belt radially is provided with a plurality of fringe shape micropore groups 1.Described dynamic pressure micropore 11 is directivity dynamic pressure micropores, and the ratio of its major axis and minor axis is greater than 1, and described major axis becomes the angle of inclination with seal face diameter by dynamic pressure micropore 11 centers.
Described dynamic pressure micropore 11 depth optimization spans are 2 ~ 10 μ m; The preferred span of ratio of the major axis of described dynamic pressure micropore 11 and minor axis is 1 ~ 10; The minor axis span of described dynamic pressure micropore 11 is 10～1000 μ m.
The radial width scope on described ring packing dam 2 is 0.1～10 mm.
Dynamic pressure micropore of the present invention is directional microporous, and the shape of micropore can be the regular figures such as ellipse, rectangular, rhombus; The shape of described decompression micropore can be the regular figures such as circle, square, Hexagon.
Working principle of the present invention:
Making the radial fluid resistance reduce to cause sealing the upstream high pressure after dynamic pressure micropore 11 in the fringe shape micropore group 1 tilts under the speed shear action moves and forms the dynamic pressure opening force to low voltage side, form miniature dynamic pressure groove, thereby improved the dynamic pressure opening force of whole seal face, its power is decided by pore size and angle of inclination, and whole fringe shape distribution micropore group 1 can further be passed through direct fluid improved effect unseal performance.When fluid was continuing to enter decompression micropore 12 under the shear action after, because fluid displacement increases suddenly, pressure sharply reduced, thereby the high pressure of dynamic pressure micropore is suppressed.When low voltage starting, can separate fast the seal face friction pair, under high-speed condition, the rigidity of controllable flow body film improves the stability of fluid film.The seal clearance size mutation effect of the hole depth of micropore and the larger formation of aperture ratio produces eddy current so that flow to the fluid of micropore in the fringe shape micropore group 1 simultaneously, enlarge markedly the damping of seal face fluid film, reduce the sealing vibration, further strengthen the stability of high speed lower seal, reduce the contact friction of seal face.
Fringe shape micropore group 1 is located at the end face upstream, it is the high pressure side, can well stop solid particle to enter seal face, when having after micro-particle enters end face, micropore can play the effect of receiving, effectively bring into play the ability of the anti-solid particle of micropore, the anti-attrition abrasive resistance improves, and makes sealing can be applied to contain the higher occasion of concentration of solid particles.Simultaneously, distinctive tilting dynamic pressure micropore 11 improves hydrodynamic effect between end face greatly, provides the maintenance end face non-contacting maximum capacity, has increased the axial rigidity of sealing, and when speed is too high, but decompression micropore 12 establishment fluid film rigidity.The damping effect of micropore significantly reduces the sealing vibration in the fringe shape micropore group 1, strengthened the Ability of Resisting Disturbance of seal face, thereby made the antijamming capability of sealing or startup or stopping performance stable and under the low pressure condition be better than the mechanical seal of general spiral chute hydrodynamic.
Embodiment two
With reference to Fig. 4, the present embodiment and embodiment's one difference is that described endless belt is along being provided with a plurality of fringe shape micropore groups 1 with the direction that radially is in the tilted angle.All the other structures are all identical with embodiment one with function.
The described content of this specification embodiment only is enumerating the way of realization of inventive concept; protection scope of the present invention should not be regarded as only limiting to the concrete form that embodiment states, protection scope of the present invention also reaches in those skilled in the art conceives the equivalent technologies means that can expect according to the present invention.
Claims (6)
1. fringe shape microporous end surface mechanical sealing structure of arranging, the rotating ring that comprises mechanical seal, stationary ring, 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 at least one end face of described rotating ring or stationary ring according to the symmetrical fringe shape micropore group that is formed by tilting dynamic pressure micropore and directionless decompression micropore of rotating center, described decompression micropore is located at the end of dynamic pressure micropore, described fringe shape micropore group consists of endless belt, described endless belt is located at the end face upstream, and the downstream of described endless belt is provided with the ring packing dam of smooth flat.
2. a kind of fringe shape according to claim 1 microporous end surface mechanical sealing structure of arranging, it is characterized in that: described endless belt radially is provided with a plurality of fringe shape micropore groups.
3. a kind of fringe shape according to claim 1 microporous end surface mechanical sealing structure of arranging, it is characterized in that: described endless belt is along being provided with a plurality of fringe shape micropore groups with the direction that radially is in the tilted angle.
4. described a kind of fringe shape microporous end surface mechanical sealing structure of arranging one of according to claim 1 ~ 3, it is characterized in that: described dynamic pressure micropore is directivity dynamic pressure micropore, the ratio of its major axis and minor axis is greater than 1, and described major axis becomes the angle of inclination with seal face diameter by dynamic pressure micropore center.
5. a kind of fringe shape according to claim 4 microporous end surface mechanical sealing structure of arranging, it is characterized in that: described dynamic pressure micropore degree of depth span is 2 ~ 10 μ m; The ratio span of the major axis of described dynamic pressure micropore and minor axis is 1 ~ 10; The minor axis span of described dynamic pressure micropore is 10～1000 μ m.
6. a kind of fringe shape according to claim 5 microporous end surface mechanical sealing structure of arranging, it is characterized in that: the radial width scope on described ring packing dam is 0.1～10 mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201010583081 CN102022548B (en) | 2010-12-11 | 2010-12-11 | Mechanical seal structure of spike-shaped distribution microporous end surface |
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| CN 201010583081 CN102022548B (en) | 2010-12-11 | 2010-12-11 | Mechanical seal structure of spike-shaped distribution microporous end surface |
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| CN102022548A CN102022548A (en) | 2011-04-20 |
| CN102022548B true CN102022548B (en) | 2013-03-27 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104154235B (en) * | 2014-05-07 | 2017-01-25 | 清华大学 | Spiral distribution convergent micropore texture mechanical seal |
| CN104179975B (en) * | 2014-07-22 | 2017-02-01 | 西安电子科技大学 | Controllable mechanical seal based on closing force change |
| CN104165228B (en) * | 2014-07-25 | 2016-04-13 | 浙江工业大学 | A kind of like sensitive plant nibs bunch end surface mechanical sealing structure |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0601821A1 (en) * | 1992-12-11 | 1994-06-15 | Nippon Pillar Packing Co., Ltd. | Non-contacting shaft sealing device |
| CN101672364A (en) * | 2009-10-15 | 2010-03-17 | 浙江工业大学 | Double-row tilting directional microporous end surface no-leakage mechanical sealing structure |
| CN201521637U (en) * | 2009-10-16 | 2010-07-07 | 浙江工业大学 | Tilting mechanical sealing structure for end face of directional micropore |
| CN201916491U (en) * | 2010-12-11 | 2011-08-03 | 浙江工业大学 | Mechanical sealing structure of spike-shaped micropore configuration end plane |
-
2010
- 2010-12-11 CN CN 201010583081 patent/CN102022548B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0601821A1 (en) * | 1992-12-11 | 1994-06-15 | Nippon Pillar Packing Co., Ltd. | Non-contacting shaft sealing device |
| CN101672364A (en) * | 2009-10-15 | 2010-03-17 | 浙江工业大学 | Double-row tilting directional microporous end surface no-leakage mechanical sealing structure |
| CN201521637U (en) * | 2009-10-16 | 2010-07-07 | 浙江工业大学 | Tilting mechanical sealing structure for end face of directional micropore |
| CN201916491U (en) * | 2010-12-11 | 2011-08-03 | 浙江工业大学 | Mechanical sealing structure of spike-shaped micropore configuration end plane |
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Effective date of registration: 20200106 Address after: 314415 within huangwan town government, Jiaxing City, Zhejiang Province Patentee after: Haining huangwan town Asset Management Co.,Ltd. Address before: 510000 unit 2414-2416, building, No. five, No. 371, Tianhe District, Guangdong, China Patentee before: GUANGDONG GAOHANG INTELLECTUAL PROPERTY OPERATION Co.,Ltd. Effective date of registration: 20200106 Address after: 510000 unit 2414-2416, building, No. five, No. 371, Tianhe District, Guangdong, China Patentee after: GUANGDONG GAOHANG INTELLECTUAL PROPERTY OPERATION Co.,Ltd. Address before: Hangzhou City, Zhejiang province 310014 City Zhaohui District Six Patentee before: Zhejiang University of Technology |