CN1828098A - Non-contact mechanical end face sealing structure - Google Patents
Non-contact mechanical end face sealing structure Download PDFInfo
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- CN1828098A CN1828098A CN 200610049291 CN200610049291A CN1828098A CN 1828098 A CN1828098 A CN 1828098A CN 200610049291 CN200610049291 CN 200610049291 CN 200610049291 A CN200610049291 A CN 200610049291A CN 1828098 A CN1828098 A CN 1828098A
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- microflute
- sealing structure
- endless belt
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- groove
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- 238000007789 sealing Methods 0.000 title claims abstract description 51
- 238000012856 packing Methods 0.000 claims description 17
- 238000011144 upstream manufacturing Methods 0.000 claims description 14
- 239000007788 liquid Substances 0.000 claims description 8
- 230000000694 effects Effects 0.000 abstract description 32
- 239000002245 particle Substances 0.000 abstract description 18
- 239000007787 solid Substances 0.000 abstract description 14
- 239000012530 fluid Substances 0.000 abstract description 10
- 230000003068 static effect Effects 0.000 abstract description 4
- 230000001174 ascending effect Effects 0.000 abstract 1
- 238000001179 sorption measurement Methods 0.000 abstract 1
- 230000002706 hydrostatic effect Effects 0.000 description 7
- 238000005461 lubrication Methods 0.000 description 4
- 238000002425 crystallisation Methods 0.000 description 3
- 230000008025 crystallization Effects 0.000 description 3
- 231100000614 poison Toxicity 0.000 description 3
- 230000007096 poisonous effect Effects 0.000 description 3
- 238000005086 pumping Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 238000009834 vaporization Methods 0.000 description 2
- 230000008016 vaporization Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 210000004907 gland Anatomy 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000011859 microparticle Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
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Abstract
The invention relates to a non-contact mechanical end surface sealing structure, which comprises mechanical sealed movable ring and stable ring. While the end surface of stable or movable ring has micro groove and porous zone that symmetry according to the rotational center. Wherein, said zone is at the ascending part of end surface and the micro groove is at the descending part, which has a circular sealing dam beside it. The invention can be used in variable mediums to increase the ability of solid particle, the static pressure property, fluid dynamic pressure property and the pump adsorption property, to attain better sealing effect, with long service life.
Description
(1) technical field
The present invention relates to a kind of non-contact mechanical end face sealing, be applicable to the shaft end seal device of rotating machinery rotating shafts such as various compressors, pump and still stirrer.
(2) background technique
Conventional machinery sealing or contact-type mechanical end face seal are generally adopted in the rotating shaft of rotary type fluid machine, enter the nineties in 20th century, with the worlds such as Crane John Inc. sealings tycoon is the representative spiral chute end surface mechanical sealing that released one after another, (abbreviate DGS as dry gas face seals, see Lubrication Engineering, 1990,46 (9): pp607) and upstream pumping mechanical seal (be called for short UP-Stream MS, see LubricationEngineering, 1990,46 (4): pp213, USA Patent 4,290,611 and Chinese patent 03134193.4).A plurality of inventions have appearred subsequently around this two classes sealing, wherein except that unidirectional rotation DGS and UP-Stream MS, also have two-way rotation DGS and UP-Stream MS (to see Lubrication Engineering, 1993,49 (3): pp217, USA Patent 20020093141 and Chinese patent 98103575.2), except that being arranged, single endless belt also have the dicyclo band (to see USA Patent 4,212,475, ASME Journal of Lubrication Technology, 1968, pp450 and Lubrication Engineering, 1994,50 (8): pp625 and Chinese patent 96108614.9), be mainly used on the shaft end seal device of centrifugal compressor and the rotating shaft of pump class.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 sealability is lower, 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.Israelis Etsion I has invented the sealing of a kind of many (little) hole end surface and (has seen Tribology Transactions, 1996,39 (3): pp677) be applied to pump class I liquid I gland seal device, he discloses again this type of structure applications (has been seen ASME Journal ofTribology in the achievement of gas-tight sealing recently, 2004,126 (4): pp788), but the effect very limited (see world patent WO02093046) of this mechanical seal aspect generation dynamic pressure effect and reduction leakage rate.For this reason, Chinese patent 200510038704.9 discloses a kind of zero leakage non-contact mechanical seal, on the rotating ring of mechanical seal and stationary ring end face, have pumping groove simultaneously and be evenly distributed with microcosmic lubricating cavity (being micropore), but this sealing only is only applicable to liquid medium, and anti-solid particle ability, hydrostatic effects, the hydrodynamic effect, it is limited that pump draws effect, cause sealing effect limited, can not satisfy oil and the common processing medium of petrochemical industry well, particularly contain the medium of solid particle, gas medium and easy crystallization, easily vaporization and poisonous, contaminativity waits the seal request of medium by force.Hydrostatic effects, hydrodynamic effect are limited, cause start and stop weak effect under the low pressure condition.The hydrodynamic effect is limited, makes the bearing capacity of mechanical seal fluid film or end face keep non-contacting limited in one's ability, causes end wear, and working life is short.
(3) summary of the invention
In order to overcome the anti-solid particle ability that seals in the prior art, hydrostatic effects, the hydrodynamic effect, it is limited that pump draws effect, make start and stop weak effect under the low pressure condition, working life is short, and 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 difference, the invention provides a kind of medium that can be applied to various conditions, strengthen anti-solid particle ability greatly, hydrostatic effects, the hydrodynamic effect, pump draws effect, make good sealing effect, start and stop are effective under the low pressure condition, but frequent starting, the non-contact mechanical end face sealing structure of long service life.
Technological scheme of the present invention is:
A kind of non-contact mechanical end face sealing structure, the rotating ring, the stationary ring that comprise mechanical seal have microflute and micropore endless belt according to the rotating center symmetry on one of them the end face of rotating ring or stationary ring, the micropore endless belt is located at the end face upstream, microflute is located at the downstream, and there is the ring packing dam on described micropore endless belt side.
Described ring packing dam is positioned at the downstream of micropore endless belt, is interior endless belt.
The upstream of the micropore endless belt on described ring packing dam is outer endless belt.
The upstream and downstream of described micropore endless belt all has the ring packing dam.
Described ring packing dam is that the end face self by micropore endless belt limit is constituted.
The radial width scope on described ring packing dam is: 0.1～10mm.
The diameter range of micropore is: 10～200 μ m, and the aspect ratio scope is: 0.01～0.5, the area density scope of micropore is: 0.05～0.5.
The groove depth scope of microflute is: 2～30 μ m, and when medium was liquid, the groove depth scope of microflute was preferred: 10～30 μ m, when medium was gas, the groove depth scope of microflute was preferred: 2～10 μ m; The helix angle number of degrees scope of microflute is: 10～30 °, and several 4～60 of groove.
Microflute can be 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.
Working principle of the present invention: the micropore endless belt is located at the end face upstream, it is the high pressure side, microflute is located at the downstream, it is low voltage side, outer endless belt in the dicyclo band can well stop solid particle to enter seal face, after micro-particle enters end face, micropore can play part and receive effect, and interior endless belt plays the effect of three lines of defence to the particle that enters microflute, make the particle that enters fluid dynamic pressure groove very little, thereby improved the ability of the anti-solid particle of integral body of sealing greatly, made sealing can be applied to contain the higher occasion of concentration of solid particles.When sealed processing medium is relatively clean, can removes outer endless belt and make whole end face upstream portion be covered with micropore.
The pump that fluid active and static pressure effect that unique little porous of upstream endless belt produces on the seal face and downstream microflute produce draws effect and hydrodynamic effect, make the sealing structure can greatly improve hydrodynamic effect and hydrostatic effects between end face, provide the maintenance end face non-contacting maximum capacity, wherein the hydrostatic effects of micropore is similar to best conical surface end face seal, increased the axial rigidity of sealing, thereby make 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, simultaneously the sealability of sealing such as high voltage performance are improved.
When sealing and the synthetic hybrid mechanical seal of other sealing group, and during configuration buffer fluid back-up system, can realize actual zero leakage, be particularly suitable for carrying the pump of inflammable, explosive, poisonous or seriously polluted medium or the shaft end seal that still is used stirrer, and make sealing more safe and reliable, sealability further improves, and prolong the working life of sealing.
The beneficial effect of non-contact mechanical end face sealing structure of the present invention mainly shows: 1, the little porous-helical groove structure of endless belt of uniqueness on the seal face, improved anti-solid particle ability, hydrostatic effects, hydrodynamic effect, pump greatly and drawn effect, made that start and stop are effective under good sealing effect, the low pressure condition; 2, can be applied to liquid medium and gas medium, good airproof performance by the groove depth that microflute is set; 3, the hydrodynamic effect of Zeng Qianging and pump draw effect realized sealing non-contact, do not have wearing and tearing and do not have leakage, prolonged working life, improved the reliability of sealing.
(4) description of drawings
Fig. 1 is the present invention's machinery end face embodiment one a structural representation.
Fig. 2 is the present invention's machinery end face embodiment two a structural representation.
Fig. 3 is the present invention's machinery end face embodiment three a structural representation.
(5) embodiment
Below in conjunction with accompanying drawing the present invention is further described.
Embodiment one
Referring to Fig. 1: a kind of non-contact mechanical end face sealing structure, the rotating ring, the stationary ring that comprise mechanical seal, have microflute 2 and micropore endless belt on one of them the end face of rotating ring or stationary ring according to the rotating center symmetry, the micropore endless belt is located at the end face upstream, microflute 2 is located at the downstream, and there is the ring packing dam on described micropore endless belt side.Sealing weir 3 is parts of unslotted between microflute and the microflute.
Described ring packing dam is positioned at the downstream of micropore endless belt, is interior endless belt 5.
The radial width scope of endless belt is in described: 0.1～10mm.
The diameter range of micropore 1 is: 10～200 μ m, and the aspect ratio scope is: 0.01～0.5, the area density scope of micropore is: 0.05～0.5.
The groove depth scope of microflute is: 2～30 μ m, and when medium was liquid, the groove depth scope of microflute was preferred: 10～30 μ m, when medium was gas, the groove depth scope of microflute was preferred: 2～10 μ m; The helix angle number of degrees scope of microflute is: 10～30 °, and several 4～60 of groove.
Microflute 2 can be the spiral chute of one-way spiral groove, unidirectional herringbone spiral chute, unidirectional Y shape spiral chute, unidirectional L shaped spiral chute, unidirectional arc groove, one-way tape expanded channel.
During seal operation, if contain solid particle in the sealed fluid, then outer shroud takes up throttling action and prevents to enter greater than the solid particle of end clearance, and micropore makes fluid generation active and static pressure effect between end face, and the particle that enters via the outer shroud band is produced grinding and receives effect.The throttling of interior endless belt and anti-particle ability make the particle that enters microflute very little, simultaneously because strong hydrodynamic that microflute produces and pump draw the fluid active and static pressure effect of effect and the generation of little porous, the axial rigidity of sealing is significantly improved, generation is stronger to the pumping effect of leaking medium, therefore sealing is forming the non-contacting while of end face, the generation of the abrasive wear phenomenon that the existing machinery sealing technique faced be can avoid fully, and zero leakage, high stability and high reliability realized.Inside and outside endless belt also plays the effect of parking sealer when sealing is in dormant state.
When this non-contact mechanical end face sealing structure is applied to the mixing machinery seal arrangement of buffer fluid back-up system, also can be completely achieved zero leakage truly.
The total arrangement of above-mentioned sealing can be that above-mentioned single-stage is arranged, and also can be two-stage, three grades or plural serial stage arrangement.
Embodiment two
Referring to Fig. 2: a kind of non-contact mechanical end face sealing structure, the rotating ring, the stationary ring that comprise mechanical seal, have microflute 2 and micropore endless belt on one of them the end face of rotating ring or stationary ring according to the rotating center symmetry, the micropore endless belt is located at the end face upstream, microflute 2 is located at the downstream, and there is the ring packing dam on described micropore endless belt side.
Described ring packing dam is positioned at the upstream of micropore endless belt, is outer endless belt 4.
The radial width scope of described outer endless belt is: 0.1～10mm.
All the other structures of present embodiment are identical with embodiment one with implementation.
Embodiment three
Referring to Fig. 3: the upstream and downstream of described micropore endless belt all has the ring packing dam.
The radial width scope on described ring packing dam is: 0.1～10mm.
All the other structures of present embodiment are identical with embodiment one with implementation.
Claims (10)
1, a kind of non-contact mechanical end face sealing structure, the rotating ring, the stationary ring that comprise mechanical seal, it is characterized in that: have microflute and micropore endless belt on one of them the end face of rotating ring or stationary ring according to the rotating center symmetry, the micropore endless belt is located at the end face upstream, microflute is located at the downstream, and there is the ring packing dam on described micropore endless belt side.
2, a kind of non-contact mechanical end face sealing structure as claimed in claim 1 is characterized in that: described ring packing dam is positioned at the downstream of micropore endless belt, is interior endless belt.
3, a kind of non-contact mechanical end face sealing structure as claimed in claim 1 is characterized in that: the upstream of the micropore endless belt on described ring packing dam is outer endless belt.
4, a kind of non-contact mechanical end face sealing structure as claimed in claim 1, it is characterized in that: the upstream and downstream of described micropore endless belt all has the ring packing dam.
5, as the described a kind of non-contact mechanical end face sealing structure of one of claim 1-4, it is characterized in that: the radial width scope on described ring packing dam is: 0.1～10mm.
6, as the described a kind of non-contact mechanical end face sealing structure of one of claim 1-4, it is characterized in that: the diameter range of micropore is: 10～200 μ m, and the aspect ratio scope is: 0.01～0.5, the area density scope of micropore is: 0.05～0.5.
7, as the described a kind of non-contact mechanical end face sealing structure of one of claim 1-4, it is characterized in that: the groove depth scope of microflute is: 2～30 μ m, and when medium was liquid, the groove depth scope of microflute was preferred: 10～30 μ m, when medium was gas, the groove depth scope of microflute was preferred: 2～10 μ m; The helix angle number of degrees scope of microflute is: 10～30 °, and several 4～60 of groove.
8, a kind of non-contact mechanical end face sealing structure as claimed in claim 5, it is characterized in that: the groove depth scope of microflute is: 2～30 μ m, and when medium was liquid, the groove depth scope of microflute was preferred: 10～30 μ m, when medium was gas, the groove depth scope of microflute was preferred: 2～10 μ m; The helix angle number of degrees scope of microflute is: 10～30 °, and several 4～60 of groove.
9, a kind of non-contact mechanical end face sealing structure as claimed in claim 6, it is characterized in that: the groove depth scope of microflute is: 2～30 μ m, and when medium was liquid, the groove depth scope of microflute was preferred: 10～30 μ m, when medium was gas, the groove depth scope of microflute was preferred: 2～10 μ m; The helix angle number of degrees scope of microflute is: 10～30 °, and several 4～60 of groove.
10, as the described a kind of non-contact mechanical end face sealing structure of one of claim 1-4, it is characterized in that: microflute can be 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610049291 CN1828098A (en) | 2006-01-27 | 2006-01-27 | Non-contact mechanical end face sealing structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610049291 CN1828098A (en) | 2006-01-27 | 2006-01-27 | Non-contact mechanical end face sealing structure |
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|---|---|---|---|---|
| CN102022542A (en) * | 2010-12-11 | 2011-04-20 | 浙江工业大学 | Negative pressure groove end face mechanical seal structure |
| CN102062213A (en) * | 2011-01-19 | 2011-05-18 | 昆明理工大学 | Mechanical sealing ring of biomimetic fish scale groove |
| CN101696728B (en) * | 2009-10-23 | 2011-12-21 | 浙江工业大学 | Liquid lubricated end face seal structure with cross-scale surface texture characteristic |
| CN102606412A (en) * | 2011-01-19 | 2012-07-25 | 天津市三鑫阳光工贸有限公司 | Gasket for regulating angle of blade of wind power generator |
| CN103016742A (en) * | 2013-01-04 | 2013-04-03 | 四川日机密封件股份有限公司 | High-pressure-resistant mechanical sealing device |
| CN103016743A (en) * | 2012-12-13 | 2013-04-03 | 江苏大学 | Mechanical seal capable of implementing zero wear, zero leakage and preventing solid particles |
| CN103062412A (en) * | 2012-12-24 | 2013-04-24 | 浙江工业大学 | Micro-bulge double-layer composite groove deep end surface mechanical seal structure |
| 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 |
| CN103470771A (en) * | 2013-09-06 | 2013-12-25 | 浙江工业大学 | End face mechanical seal structure with air inlet grooves and micropores |
| CN103470770A (en) * | 2013-09-06 | 2013-12-25 | 浙江工业大学 | Micro-hole end face mechanical seal structure with air inlet grooves |
| CN104235372A (en) * | 2014-08-29 | 2014-12-24 | 江苏大学 | Dynamic pressure tank mechanical seal structure with improved liquid film cavitation characteristic |
| CN104728451A (en) * | 2015-04-09 | 2015-06-24 | 江西省科学院应用物理研究所 | Directivity large hole and three-dimensional groove combined non-contact type mechanical sealing structure |
| CN105840836A (en) * | 2016-05-13 | 2016-08-10 | 宝鸡市博磊化工机械有限公司 | Mechanical seal device |
| CN105840827A (en) * | 2016-05-13 | 2016-08-10 | 宝鸡市博磊化工机械有限公司 | Non-contact mechanical sealing device |
| CN106122482A (en) * | 2016-07-28 | 2016-11-16 | 浙江工业大学 | A kind of low leakage non-contacting mechanical seal end face structure |
| CN107110369A (en) * | 2014-06-03 | 2017-08-29 | 冷王公司 | Mechanical end face seals |
| EP3364078A4 (en) * | 2015-10-16 | 2019-02-27 | Kabushiki Kaisha Riken | Seal ring |
| CN111306302A (en) * | 2020-04-02 | 2020-06-19 | 清华大学 | Mechanical sealing end face structure capable of reducing end face abrasion and rotary mechanical equipment |
| CN111473116A (en) * | 2020-05-25 | 2020-07-31 | 清华大学 | Upstream pumping microtextured mechanical seal end face structure |
-
2006
- 2006-01-27 CN CN 200610049291 patent/CN1828098A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| CN101696728B (en) * | 2009-10-23 | 2011-12-21 | 浙江工业大学 | Liquid lubricated end face seal structure with cross-scale surface texture characteristic |
| CN102022542A (en) * | 2010-12-11 | 2011-04-20 | 浙江工业大学 | Negative pressure groove end face mechanical seal structure |
| CN102022542B (en) * | 2010-12-11 | 2013-04-03 | 浙江工业大学 | Negative pressure groove end face mechanical seal structure |
| CN102062213A (en) * | 2011-01-19 | 2011-05-18 | 昆明理工大学 | Mechanical sealing ring of biomimetic fish scale groove |
| CN102606412A (en) * | 2011-01-19 | 2012-07-25 | 天津市三鑫阳光工贸有限公司 | Gasket for regulating angle of blade of wind power generator |
| CN103016743A (en) * | 2012-12-13 | 2013-04-03 | 江苏大学 | Mechanical seal capable of implementing zero wear, zero leakage and preventing solid particles |
| CN103016743B (en) * | 2012-12-13 | 2015-07-08 | 江苏大学 | Mechanical seal capable of implementing zero wear, zero leakage and preventing solid particles |
| CN103062412B (en) * | 2012-12-24 | 2015-12-30 | 浙江工业大学 | Micro-bulge double-layer composite groove deep end surface mechanical seal structure |
| CN103062412A (en) * | 2012-12-24 | 2013-04-24 | 浙江工业大学 | Micro-bulge double-layer composite groove deep end surface mechanical seal structure |
| CN103016742B (en) * | 2013-01-04 | 2015-04-22 | 四川日机密封件股份有限公司 | High-pressure-resistant mechanical sealing device |
| CN103016742A (en) * | 2013-01-04 | 2013-04-03 | 四川日机密封件股份有限公司 | High-pressure-resistant mechanical sealing device |
| CN103470770A (en) * | 2013-09-06 | 2013-12-25 | 浙江工业大学 | Micro-hole end face mechanical seal structure with air inlet grooves |
| CN103470771A (en) * | 2013-09-06 | 2013-12-25 | 浙江工业大学 | End face mechanical seal structure with air inlet grooves and micropores |
| CN107110369A (en) * | 2014-06-03 | 2017-08-29 | 冷王公司 | Mechanical end face seals |
| CN104235372A (en) * | 2014-08-29 | 2014-12-24 | 江苏大学 | Dynamic pressure tank mechanical seal structure with improved liquid film cavitation characteristic |
| CN104728451A (en) * | 2015-04-09 | 2015-06-24 | 江西省科学院应用物理研究所 | Directivity large hole and three-dimensional groove combined non-contact type mechanical sealing structure |
| EP3364078A4 (en) * | 2015-10-16 | 2019-02-27 | Kabushiki Kaisha Riken | Seal ring |
| CN105840827A (en) * | 2016-05-13 | 2016-08-10 | 宝鸡市博磊化工机械有限公司 | Non-contact mechanical sealing device |
| CN105840836A (en) * | 2016-05-13 | 2016-08-10 | 宝鸡市博磊化工机械有限公司 | Mechanical seal device |
| CN106122482A (en) * | 2016-07-28 | 2016-11-16 | 浙江工业大学 | A kind of low leakage non-contacting mechanical seal end face structure |
| CN106122482B (en) * | 2016-07-28 | 2018-11-13 | 浙江工业大学 | A kind of low leakage non-contacting mechanical seal end face structure |
| CN111306302A (en) * | 2020-04-02 | 2020-06-19 | 清华大学 | Mechanical sealing end face structure capable of reducing end face abrasion and rotary mechanical equipment |
| CN111473116A (en) * | 2020-05-25 | 2020-07-31 | 清华大学 | Upstream pumping microtextured mechanical seal end face structure |
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