CN2432391Y - Linear fluid dynamic channel upstream pumping machine seal - Google Patents
Linear fluid dynamic channel upstream pumping machine seal Download PDFInfo
- Publication number
- CN2432391Y CN2432391Y CN 00239203 CN00239203U CN2432391Y CN 2432391 Y CN2432391 Y CN 2432391Y CN 00239203 CN00239203 CN 00239203 CN 00239203 U CN00239203 U CN 00239203U CN 2432391 Y CN2432391 Y CN 2432391Y
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- China
- Prior art keywords
- dynamic pressure
- pressure groove
- groove
- diameter
- ring
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- Expired - Fee Related
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- Mechanical Sealing (AREA)
Abstract
The utility model relates to a novel mechanical sealing method using a single-row fluid dynamic pressure groove upstream pumping way. A sealing movable ring or a stationary ring is provided with a single-row fluid dynamic pressure groove with a specific groove shape and the middle of the fluid dynamic pressure groove is provided with annular groove to form upstream and downstream pumping section dynamic pressure grooves, so that a non-contact type mechanical seal with fluid lubrication is obtained.
Description
The utility model relates to a kind of novel single-row fluid dynamic pressure groove upstream pumping mechanical seal, belonging to particularly mechanical sealing technology field of fluid seals technology, is a kind of novel fluid dynamic and static pressure lubricating (comprising liquid lubrication and gas lubrication) non-contact mechanical seal device.It mainly is by offering the fluid dynamic pressure groove of single-row special grooved and offer annular groove at the middle part of dynamic pressure groove forming upstream and downstream pump segment dynamic pressure groove on sealing rotating ring or stationary ring, thereby reaches the fluid lubrication non-contact mechanical seal.
At present, in petrochemical industry and petroleum works, be extensive use of various types of mechanical seals, but, making applying unit not satisfied because they all have different defectives and deficiency.Disclosing a kind of single-row spiral fluted fluid active and static pressure combined type non-contact mechanical seal that has as 1. .US4212475, is to rely on spiral fluted to pump into effect to realize that seal face is non-contacting, mainly as the dry gas mechanical seal of centrifugal compressor.But under the high speed rotating condition, sealing is easy to cause the early failue that seals between the solid particle suction seal end face in the separation gas and produce abrasive wear; And the separation gas consumption of this sealing is very big, and economic benefit is not satisfactory.2. .US4290611 has invented and has a kind ofly also had single-row spiral fluted and can realize high pressure pumping non-contact mechanical seal, be the low pressure fluid partitioning to be pumped to the high pressure side and to realize that the nothing of sealed fluid leaks, be suitable for the pump shaft envelope of making to carry liquid by the fluid dynamic pressure groove that is positioned at low voltage side.US4212475 is the same with patent, and sealing very easily pumps into the solid particle in the fluid partitioning between the seal face and causes the wear out failure of sealing; In addition, sealing is to prevent that fluid partitioning from causing a large amount of material damages to the atmospheric side leakage, generally should set up auxiliary seal in its outside.3. .US4407509 discloses a kind of rotating machinery that has the multiple-blade type on height surface on seal face and has leaked non-contact mechanical seal with nothing, be to return the sealed fluid reverse pumping that flows to low voltage side from the high pressure side on high-tension side by the sticky shearing effect of fluid under the high speed rotational blade, can realize macroscopical zero leakage of sealed fluid in theory, but the microcosmic that in fact is difficult to eliminate sealed medium leaks only.
The purpose of this utility model provides a kind of single-row fluid dynamic pressure groove upstream pumping mechanical seal with regard to being to avoid above-mentioned the deficiencies in the prior art part.It is existing as because of pumping into solid particle the defectives such as absolute no leakage that abrasive wear, buffer fluid consumption are big, be difficult to realize sealed medium take place easily at hydrodynamic non-contact mechanical seal of the prior art, develop have desirable anti-solid particle function, hang down the buffer fluid consumption, good unlatching performance, outstanding working stability and the Leakless pumping non-contact mechanical seal of reliability.It mainly is by mainly, elastic element some by stationary seal ring, sealing rotating ring, auxiliary seal ring, stop pin, rotary sleeve, positioning screwn, sealed case, gland etc. constitute, its major technology characteristics are: the fluid dynamic pressure groove of offering special grooved at the end face of sealing rotating ring or stationary ring, its true dip direction is opposite with the sense of rotation of rotating ring, the internal diameter of dynamic pressure groove is greater than the internal diameter of stationary ring, the external diameter of dynamic pressure groove is less than the external diameter of stationary ring, thereby formed the fluid dynamic pressure groove end face that has the double-sealing dam; An annular groove is offered near the internal diameter position of dynamic pressure groove in centre at the dynamic pressure groove, and the dynamic pressure groove is divided into upstream dynamic pressure groove section and downstream dynamic pressure groove section; The corresponding diameter of annular groove place offers circumferentially uniform through hole of a plurality of edges on stationary seal ring and rotating ring, and through-hole diameter is generally more than or equal to the width of annular groove.
Accompanying drawing 1 is the utility model is offered single-row dynamic pressure groove at rotating ring overall structure schematic representation.
It is the sealing rotating ring schematic representation of having offered single-row dynamic pressure groove that accompanying drawing 2 is the utility model.
Accompanying drawing 3 is the utility model is offered single-row dynamic pressure groove at stationary ring overall structure schematic representation.
It is the stationary seal ring schematic representation of having offered single-row dynamic pressure groove that accompanying drawing 4 is the utility model.
Accompanying drawing 5 is the structural representation of the dynamic and static friction pair of the utility model.
The drawing of accompanying drawing is described as follows:
1---stationary seal ring 2---sealing rotating ring 3---auxiliary seal ring 4---stop pin
5---running shaft 6---auxiliary seal ring 7---axle sleeve 8---sealed case
9---auxiliary seal ring 10---gland 11---auxiliary seal ring 12---positioning ring
13---snap ring 14---positioning screwn 15---elasticity original paper 16---auxiliary seal ring
17---dynamic pressure groove 18---annular groove 19---through hole 20---goes up the sealing dam
21---lower seal dam
In order to realize better above-mentioned purpose of the present utility model, designer of the present utility model is It can be helix, circular arc line, straight line or other song that the groove design of fluid dynamic pressure groove (17) is become Line; Diameter d to a plurality of through holes (19) of on stationary seal ring (1), offeringaThe average diameter that requirement equals rotating ring (2) ring-shaped groove (18) (is da=(D
a1+D
a2)/2), the diameter d of its through hole (19) Generally more than or equal to the width of ring-shaped groove (18); Radial width to ring-shaped groove (18) requires little In or equal (Da2-D
a1)/2, degree of depth h2Degree of depth h more than or equal to dynamic pressure groove1, inner diameter Da1Inner diameter D greater than dynamic pressure groove (17)g1, D outer diametera2D outer diameter less than dynamic pressure groove (17)g2, usually, ring-shaped groove (18) is near the inner diameter D of dynamic pressure groove (17)g1。
Come enumeration structural feature of the present utility model below in conjunction with drawings and Examples:
In actual design with in making, artificer of the present utility model realizes that like this design machinery requires: the fluid dynamic pressure groove (17) of offering a row special shape at sealing rotating ring end face, its true dip direction is opposite with the sense of rotation of rotating ring (2), the inside diameter D of dynamic pressure groove (17)
G1Inner diameter d greater than stationary ring (1)
1, the outer diameter D of dynamic pressure groove (17)
G2Outside diameter d less than stationary ring (1)
2Thereby, having formed the fluid dynamic pressure groove end face that has the double-sealing dam, upstream seal dam (20) radial width is S
2=(d
2-D
G2)/2), the width on sealing dam, downstream (21) is S
1=(D
A1-d
1)/2.Simultaneously, offer an annular groove (18), fluid dynamic pressure groove (17) is divided into two-part in certain position, centre of dynamic pressure groove (17), pumping section dynamic pressure groove and downstream pump segment dynamic pressure groove, both pumping directions are consistent; Radial width S≤2 of annular groove (18) millimeter, degree of depth h
2The degree of depth h of 〉=dynamic pressure groove (17)
1, inside diameter D
A1Inside diameter D greater than dynamic pressure groove (17)
G1, outer diameter D
A2Outer diameter D less than dynamic pressure groove (17)
G2In stationary seal ring shown in Figure 3 (1) diameter d
aThe place offers n along circumferential uniform through hole (19), diameter d
aThe average diameter that equals rotating ring (2) annular groove (18) (is d
a=(D
A1+ D
A2)/2), the diameter d of through hole (19) is generally more than or equal to the width S of annular groove (18).After designing the fluid dynamic pressure groove of above-mentioned dynamic and static ring (17), install according to the overall structure shown in the accompanying drawing 1 again.Like this, this mechanical seal can be carried out work by following principle: under operating conditions, the neutral buffer fluid that has certain pressure (being higher or lower than the pressure of sealed fluid) enters the back of stationary seal ring (1) through hand-hole, introduce between dynamic and static ring (1) end face by several through holes on the stationary seal ring (1), and forming a stable fluid isolation film with the corresponding annular groove of stationary ring (1) through hole (19) (18) position; Simultaneously, pumping section (i.e. (D
G2-D
A2)/2 part) fluid dynamic pressure groove (17) buffer fluid to the high pressure side pumping, thereby stop of the leakage of on high-tension side sealed fluid, and downstream pump segment (i.e. (D to low voltage side
A1-D
G1)/2 part) fluid dynamic pressure groove (17) buffer fluid to annular groove (18) position pumping, thereby reduce even eliminated the leakage of buffer fluid to atmospheric side, reduced the matter and energy loss; And downstream pump segment fluid dynamic pressure groove (17) can also prevent that the solid particle in the buffer fluid from entering downstream sealing dam (21) and guaranteeing the effect of its parking sealer.Upstream seal dam (20) mainly works stop sealing and buffer fluid throttling action, and sealing dam, downstream (21) mainly works stop sealing and anti-solid particle effect.
If offer fluid dynamic pressure groove (17) at the end face of stationary seal ring (1), then should be opposite with the sense of rotation of the fluid dynamic pressure groove (17) offered on sealing rotating ring (2) end face, and effect is identical with the effect of offering fluid dynamic pressure groove (17) at sealing rotating ring (2) end face, and just the static ring material that sealing material might be when offering fluid dynamic pressure groove (17) at the rotating ring end face is different
Compare with hydrodynamic non-contact mechanical seal of the prior art, the utlity model has following obvious advantage:
1. this single-row fluid dynamic pressure groove upstream pumping mechanical seal can realize that the microcosmic of sealed fluid does not have leakage, has good sealing function, has thoroughly eliminated the pollution to environment.Applicable to the centrifugal pump of carrying process fluids such as various inflammable, explosive, huge poison, costliness, centrifugal compressor, mixing plant and other rotating machinery class axle envelope.
2. has good anti-solid particle function.Promptly can avoid the solid particle in the sealed fluid is pumped to and cause abrasive wear between the seal face, can prevent that again the solid particle in the buffer fluid from scratching sealing dam, downstream, destroy its parking sealer function.Therefore, sealing can be used for carrying the rotating machinery class axle envelope that contains the solid particle process fluid.
3. the consumption of buffer fluid reduces relatively, has reduced the operating cost of pump, the corresponding economic benefit that improved.
4. using scope is widened greatly, both can be used as liquid seal, can be used as gas seal again, is applicable to centrifugal pump, centrifugal compressor, mixing plant and all kinds of rotating machinery class axle envelope.
5. have good moment startability, under static state buffer fluid directly injects between the sealing surface, and moment can form fluid film rapidly and two sealing surfaces are separated when starting, eliminated the solid friction of moment between the sealing surface.So sealing also is suitable for the rotating machinery class axle envelope of making frequent start-stop.
Novel single-row fluid dynamic pressure groove upstream pumping mechanical seal has excellent sealing ability, non-environmental-pollution, friction power loss is low, long service life, good anti-solid particle performance and start-stop car function, material consumption is few, advantages such as using scope is wide, its successful Application and Development not only can improve China's mechanical sealing technology level, formation has the high-new sealing technique industry of independent intellectual property right, can improve the stability and the reliability of existing operational outfit operation again greatly, energy-saving and cost-reducing, reduce environmental pollution degree and corresponding environmental protection input, the economic benefit of generation and social benefit are quite objective.
Claims (4)
1. single-row fluid dynamic pressure groove upstream pumping mechanical seal, it mainly is by mainly by stationary seal ring (1), sealing rotating ring (2), auxiliary seal ring some (3) (6) (9) (11) (16), elastic element (15), stop pin (4), rotary sleeve (7), positioning screwn (14), sealed case (8), gland formations such as (10), it is characterized in that offering fluid dynamic pressure groove (17) at the end face of sealing rotating ring (2) or stationary seal ring (1), its true dip direction is opposite with the sense of rotation of rotating ring, this dynamic pressure groove (17) internal diameter greater than the internal diameter of stationary ring, external diameter is less than the external diameter of stationary ring, thereby formation has fluid dynamic pressure groove (17) end face on double-sealing dam; Offer the groove (18) of an annular simultaneously at the middle part of dynamic pressure groove (17), dynamic pressure groove (17) is divided into pumping section dynamic pressure groove and downstream pump segment dynamic pressure groove, offers the circumferential equally distributed through holes in a plurality of edges (19) with the corresponding diameter of annular groove (18) place that seals on the rotating ring (2) at stationary seal ring (1).
2. single-row fluid dynamic pressure groove upstream pumping mechanical seal according to claim 1, the grooved that it is characterized in that described fluid dynamic pressure groove (17) can be helix, circular arc line, straight line.
3. single-row fluid dynamic pressure groove upstream pumping mechanical seal according to claim 1 is characterized in that the diameter d a of described a plurality of through holes (19) of offering equals the average diameter of rotating ring (2) annular groove (18), i.e. d on stationary seal ring (1)
a=(D
A1+ D
A2)/2, the diameter d of through hole (19) are generally more than or equal to the width of annular groove (18).
4. single-row fluid dynamic pressure groove upstream pumping mechanical seal according to claim 1 is characterized in that the radial width of described annular groove (18) is less than or equal to (D
A2-D
A1)/2, degree of depth h
2Degree of depth h more than or equal to the dynamic pressure groove
1, inside diameter D
A1Inside diameter D greater than dynamic pressure groove (17)
G1, outer diameter D
A2Outer diameter D less than dynamic pressure groove (17)
G2Usually, annular groove (18) is near the inside diameter D of dynamic pressure groove (17)
G1
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00239203 CN2432391Y (en) | 2000-06-13 | 2000-06-13 | Linear fluid dynamic channel upstream pumping machine seal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00239203 CN2432391Y (en) | 2000-06-13 | 2000-06-13 | Linear fluid dynamic channel upstream pumping machine seal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2432391Y true CN2432391Y (en) | 2001-05-30 |
Family
ID=33600094
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00239203 Expired - Fee Related CN2432391Y (en) | 2000-06-13 | 2000-06-13 | Linear fluid dynamic channel upstream pumping machine seal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2432391Y (en) |
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100449182C (en) * | 2005-04-05 | 2009-01-07 | 江苏大学 | Method for realizing zero leakage and non-contact mechanical seal |
| CN101158405B (en) * | 2007-06-21 | 2010-04-21 | 丹东克隆集团有限责任公司 | Radial direction double end-face mechanical sealing device |
| CN101776152A (en) * | 2010-03-05 | 2010-07-14 | 北京化工大学 | Outside pressurized type dynamic and static pressure gas lubricating and sealing device |
| CN102022542A (en) * | 2010-12-11 | 2011-04-20 | 浙江工业大学 | Negative pressure groove end face mechanical seal structure |
| CN102147011A (en) * | 2010-02-08 | 2011-08-10 | 祥景精机股份有限公司 | Shaft seal with protection effect |
| CN102220886A (en) * | 2011-05-16 | 2011-10-19 | 西安交通大学 | Device and method for automatically adjusting seal pressure of helical groove at shaft end of turbine |
| CN101603596B (en) * | 2008-06-12 | 2012-06-13 | 祥景精机股份有限公司 | Shaft seal device |
| CN102518809A (en) * | 2011-12-29 | 2012-06-27 | 江苏大学 | Solid particle suction preventive type fluid dynamic pressure mechanical sealing ring |
| CN102537365A (en) * | 2012-03-08 | 2012-07-04 | 大连华阳光大密封有限公司 | Non-contact type mechanical sealing device |
| CN102644749A (en) * | 2012-04-27 | 2012-08-22 | 大连华阳光大密封有限公司 | Shaft sleeve structure convenient for detachment of mechanical seal |
| CN103267132A (en) * | 2013-05-28 | 2013-08-28 | 南京林业大学 | Self-pumping fluid-dynamic-pressure-type mechanical seal |
| CN103791097A (en) * | 2014-02-28 | 2014-05-14 | 江苏大学 | Combination fluid dynamic pressure groove mechanical seal ring capable of automatically discharging particles |
| CN103836196A (en) * | 2014-01-26 | 2014-06-04 | 清华大学 | Intelligent fluid dynamic pressure mechanical seal device achieving rotating speed self-adaption |
| CN104235380A (en) * | 2014-08-29 | 2014-12-24 | 江苏大学 | Mechanical seal with two-stage staggered hydrodynamic grooves |
| CN104942543A (en) * | 2015-06-15 | 2015-09-30 | 中国石油大学(华东) | Nanometer material increase manufacturing method of upstream pumping mechanical seal |
| CN106089692A (en) * | 2016-07-01 | 2016-11-09 | 魏宇坤 | A kind of cryogenic liquid pump self-lubricating contact device and method |
| CN108692031A (en) * | 2018-06-01 | 2018-10-23 | 大连久泰密封有限公司 | A kind of friction pair of dry gas seals |
| CN109737094A (en) * | 2018-11-13 | 2019-05-10 | 陕西蓝箭航天技术有限公司 | Dynamic sealing device and gas-turbine-pump combination for turbine pump |
-
2000
- 2000-06-13 CN CN 00239203 patent/CN2432391Y/en not_active Expired - Fee Related
Cited By (27)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100449182C (en) * | 2005-04-05 | 2009-01-07 | 江苏大学 | Method for realizing zero leakage and non-contact mechanical seal |
| CN101158405B (en) * | 2007-06-21 | 2010-04-21 | 丹东克隆集团有限责任公司 | Radial direction double end-face mechanical sealing device |
| CN101603596B (en) * | 2008-06-12 | 2012-06-13 | 祥景精机股份有限公司 | Shaft seal device |
| CN102147011A (en) * | 2010-02-08 | 2011-08-10 | 祥景精机股份有限公司 | Shaft seal with protection effect |
| CN102147011B (en) * | 2010-02-08 | 2015-08-26 | 祥景精机股份有限公司 | The shaft seal of tool protective action |
| CN101776152B (en) * | 2010-03-05 | 2013-08-21 | 北京化工大学 | Outside pressurized type dynamic and static pressure gas lubricating and sealing device |
| CN101776152A (en) * | 2010-03-05 | 2010-07-14 | 北京化工大学 | Outside pressurized type dynamic and static pressure gas lubricating and sealing device |
| 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 |
| CN102220886A (en) * | 2011-05-16 | 2011-10-19 | 西安交通大学 | Device and method for automatically adjusting seal pressure of helical groove at shaft end of turbine |
| CN102220886B (en) * | 2011-05-16 | 2014-01-29 | 西安交通大学 | Device and method for automatically adjusting seal pressure of helical groove at shaft end of turbine |
| CN102518809B (en) * | 2011-12-29 | 2015-04-22 | 江苏大学 | Solid particle suction preventive type fluid dynamic pressure mechanical sealing ring |
| CN102518809A (en) * | 2011-12-29 | 2012-06-27 | 江苏大学 | Solid particle suction preventive type fluid dynamic pressure mechanical sealing ring |
| CN102537365A (en) * | 2012-03-08 | 2012-07-04 | 大连华阳光大密封有限公司 | Non-contact type mechanical sealing device |
| CN102644749A (en) * | 2012-04-27 | 2012-08-22 | 大连华阳光大密封有限公司 | Shaft sleeve structure convenient for detachment of mechanical seal |
| CN103267132A (en) * | 2013-05-28 | 2013-08-28 | 南京林业大学 | Self-pumping fluid-dynamic-pressure-type mechanical seal |
| WO2014190825A1 (en) * | 2013-05-28 | 2014-12-04 | 南京林业大学 | Pump-conveyed fluid dynamic-pressure mechanical seal |
| CN103267132B (en) * | 2013-05-28 | 2015-08-05 | 南京林业大学 | From the mechanical seal of pumping Hydrodynamic pressure type |
| CN103836196A (en) * | 2014-01-26 | 2014-06-04 | 清华大学 | Intelligent fluid dynamic pressure mechanical seal device achieving rotating speed self-adaption |
| CN103836196B (en) * | 2014-01-26 | 2016-04-13 | 清华大学 | A kind of rotating speed self-adapting intelligent type hydrodynamic mechanical seal device |
| CN103791097A (en) * | 2014-02-28 | 2014-05-14 | 江苏大学 | Combination fluid dynamic pressure groove mechanical seal ring capable of automatically discharging particles |
| CN104235380A (en) * | 2014-08-29 | 2014-12-24 | 江苏大学 | Mechanical seal with two-stage staggered hydrodynamic grooves |
| CN104942543A (en) * | 2015-06-15 | 2015-09-30 | 中国石油大学(华东) | Nanometer material increase manufacturing method of upstream pumping mechanical seal |
| CN106089692A (en) * | 2016-07-01 | 2016-11-09 | 魏宇坤 | A kind of cryogenic liquid pump self-lubricating contact device and method |
| CN108692031A (en) * | 2018-06-01 | 2018-10-23 | 大连久泰密封有限公司 | A kind of friction pair of dry gas seals |
| CN109737094A (en) * | 2018-11-13 | 2019-05-10 | 陕西蓝箭航天技术有限公司 | Dynamic sealing device and gas-turbine-pump combination for turbine pump |
| CN109737094B (en) * | 2018-11-13 | 2020-05-12 | 陕西蓝箭航天技术有限公司 | Dynamic sealing device for turbine pump and turbine pump set |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |