CN103216626A - Dry air-sealed end face groove profile rotating bilaterally - Google Patents
Dry air-sealed end face groove profile rotating bilaterally Download PDFInfo
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- CN103216626A CN103216626A CN2013101318426A CN201310131842A CN103216626A CN 103216626 A CN103216626 A CN 103216626A CN 2013101318426 A CN2013101318426 A CN 2013101318426A CN 201310131842 A CN201310131842 A CN 201310131842A CN 103216626 A CN103216626 A CN 103216626A
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Abstract
The invention discloses a dry air-sealed end face groove profile rotating bilaterally. The dry air-sealed end face groove profile is provided with a movable ring end face, wherein 8-12 dynamic pressure grooves are uniformly distributed on the dynamic ring end face along a circumferential direction; each dynamic pressure groove is concave; the depth of each dynamic pressure groove is 5-15 mum; and each dynamic pressure groove has a concave structure constructed by an inlet arc line which is formed on the outer circumference of a dynamic ring, a left outer-side arc edge and a right outer-side arc edge which are connected to the two ends of the inlet arc line symmetrically, a left outer side straight edge and a right outer side straight edge which are correspondingly connected to the other ends of the left outer side arc edge and the right outer side arc edge respectively and of which the extension lines are vertical to the inner circumference of the dynamic ring, a left groove root and a right groove root which are correspondingly connected to the other ends of the left outer side straight edge and the right outer side straight edge respectively and are parallel to the outer circumference of the dynamic ring and the inner circumference of the dynamic ring, and a middle isolating block of which the periphery is connected with the other ends of the left groove root and the right groove root. Due to the adoption of the dry air-sealed end face groove profile, the sealing pneumatic performance can be improved, the groove profile processing difficulty is lowered, the matching property of a sealed groove profile and the practical requirement is improved, and the higher requirement of modern industry on sealing is met.
Description
Technical field
The present invention relates to a kind of running shaft end face seal structure.Particularly relate to a kind of dry gas seals end face grooved that is used for the two-way rotation in fields such as oil, chemical industry, metallurgy, aviation.
Background technique
Dry gas seals is a kind of gas dynamic pressure effect of utilizing, under two relative rotating conditions of seal face, pump fluid between two seal faces by the seal groove on one of them sealing surface, forming air film and producing certain pressure increases, be opening force, make two seal faces be issued to sealing between rotation and the on-rotatably moving part at contact conditions not.Dry gas seals can adopt the safe gas of inoperative medium as sealing medium, have that ride quality is stable, reliability is high, leakage rate is little, advantages such as non-environmental-pollution, be specially adapted to high temperature, high pressure, at a high speed, severe rugged environment such as poisonous and severe corrosive, especially be applied in the rotary blade mechanical driver unit in fields such as oil, chemical industry, metallurgy, aviation.
Dry gas seals is divided unidirectional and two-way two big classes.The dry gas seals of unidirectional rotation, grooved are generally typical asymmetric spiral flute type, only satisfy the unidirectional rotation requirement of running shaft.Two-way dry gas seals major function is for adapting to two-way rotation requirement, and present grooved has grooveds such as dovetail groove, splayed shape groove, double-row double-blade spiral groove.From the engineering applicable cases, existing two-way rotary seal groove processing and manufacturing process difficulty are bigger, and its aerodynamic parameter such as leakage rate and opening force are still waiting further improvement under the high speed rotating situation simultaneously.All have certain wedge angle as dovetail groove, splayed shape groove, under the state of rotating ring high speed rotating, its wedge angle is very easy to broken, promptly influences sealing effect, causes more serious friction again.
Summary of the invention
Technical problem to be solved by this invention is, a kind of dry gas seals end face grooved that is used for the two-way rotation that is made of rotating ring and stationary ring is provided.
The technical solution adopted in the present invention is: a kind of dry gas seals end face grooved of two-way rotation, include the rotating ring end face, along the circumferential direction equally distributedly on the rotating ring end face be provided with 8～12 dynamic pressure grooves, each dynamic pressure groove be shaped as concave structure, the groove depth of each dynamic pressure groove is 5-15 μ m.
The intermediate isolating piece that it is one that the recess of described each dynamic pressure groove all embeds with described ring end face.
Described dynamic pressure groove be by: be formed on the inlet camber line on the rotating ring excircle, the left-external side arc limit that is connected described inlet camber line two ends and the right lateral arcs limit of symmetry, corresponding respectively be connected the perpendicular left-external side straight flange of the left-external side arc limit and the right lateral arcs limit the other end and elongation line and rotating ring inner circumference and right outside straight flange, corresponding respectively left groove root and the right groove root that is connected left-external side straight flange and the right outside straight flange the other end and parallels, and the concave structure that periphery constituted that is connected the intermediate isolating piece by left groove root with the right groove root the other end with described rotating ring excircle and rotating ring inner circumference.
The center of circle of described left groove root and right groove circular arc that root forms and the center of circle of described rotating ring excircle and rotating ring inner circumference are same center of circle O, wherein, corresponding described center of circle O, the radius of described left groove root and right groove root is Rg1, the last summit of left-external side straight flange and right outside straight flange is Rg2 far from the distance of center of circle O, and the radius of described rotating ring excircle is Ro, and the radius of described rotating ring inner circumference is Ri, and, Ri＜Rg1≤Rg2＜Ro.
The radius of the corresponding described center of circle O of top camber line of the intermediate isolating piece integrally formed with encircling end face is Rh, and the height of described intermediate isolating piece is h, and the span of described height h is 0≤h≤2 (R0-Rg1)/3.
Being formed on the end points at two ends of the inlet camber line on the rotating ring excircle and the number of degrees of the formed included angle B 1OB2 of center of circle O line is β, the number of degrees of the end points at the two ends of intermediate isolating piece top camber line and the formed angle F1OF2 of center of circle O line are θ, described β and θ satisfy 0 °≤θ≤β≤12 °, 5 °≤β≤12 °.
Described left-external side arc limit and right lateral arcs limit are: do the mid point B3 of inlet camber line and the center of circle O line and the rotating ring inner circumference of rotating ring excircle and intersect at the A point, be the center of circle, be that radius is done circle that with an A formed two circular arcs are left-external side arc limit and right lateral arcs limit with inlet left end point B1 of camber line and the line B1A that A is ordered.
The number range of described Rg1 is Rg1/Ri 〉=1.05; The number range of Rg2 is Rg1≤Rg2≤0.5 (Rg1+R0), and when Rg1=Rg2, the C1 point overlaps with the D1 point, the C2 point overlaps with the D2 point.
The dry gas seals end face grooved of a kind of two-way rotation of the present invention can improve the sealing aeroperformance, simplifies the grooved difficulty of processing, improve the matching of poor type of sealing and actual demand, satisfies the requirements at the higher level of modern industry to sealing.And, the present invention have can two-way rotation characteristic, and line style is more smooth, has avoided structural sharp-pointed summit, thereby reduces stress concentration point; Simplified the difficulty of processing of grooved; Grooved can be realized seriation, satisfies opening force, the leakage rate requirement of wide range.Also have following useful achievement:
1) be under the 2-4 μ m operating conditions at normal air-film thickness, grooved of the present invention has that leakage rate is little, the big characteristics of opening force.
2) grooved of the present invention can have Applicable scope flexibly by size control leakage rate and the suitable opening force of adjusting of determining the intermediate isolating piece.
3) grooved of the present invention has been eliminated the ubiquitous local sharp comer problem of present dynamic pressure grooved, and line style is succinctly smooth, has simplified manufacturing process.
Description of drawings
Fig. 1 is an overall structure schematic representation of the present invention;
Fig. 2 is the structural representation of dynamic pressure groove of the present invention.
1: rotating ring end face 2: the dynamic pressure groove
3: intermediate isolating piece 4: the rotating ring excircle
5: rotating ring inner circumference 6: Ba Qu
7: the weir district
Embodiment
Make a detailed description below in conjunction with embodiment and accompanying drawing dry gas seals end face grooved a kind of two-way rotation of the present invention.
The objective of the invention is to find one to have the opening force height, leakage rate is low, and aeroperformance is good, the simple dry gas seals grooved of manufacturing process.
Term involved among the present invention is as follows:
Stationary ring: the ring that dry gas sealing structure does not rotate with rotating shaft in course of normal operation;
Rotating ring: the ring that dry gas sealing structure rotates with rotating shaft in course of normal operation;
Seal face: rotating ring that contacts with air film and stationary ring face;
Air film: between rotating ring and stationary ring, the skim that is formed by dynamic pressure groove pump gas is generally 2-5 μ m with the separated gas of dynamic and static ring end face;
Dynamic pressure groove: at the groove that is used for pump gas of rotating ring seal face side;
Kinetic pressure: under rotation status since the gas pressure that the pumping of dynamic pressure groove produces increase;
Groove district: the zone that on dry gas seals ring end face, can provide essential hydrodynamic pressure to slot;
Ba Qu: barrier gas is compressed the zone that forms dynamic pressure effect by the lateral flows inside with realization gas;
Weir district: the unslotted zone on the anchor ring of the dynamic pressure groove place of seal face;
Opening force: the power that rotating ring and stationary ring are separated is formed by the air film of seal face;
Leakage rate: the gas gross that flows to low voltage terminal in the unit time by the end clearance by the seal ring high voltage terminal.
As shown in Figure 1 and Figure 2, the dry gas seals end face grooved of a kind of two-way rotation of the present invention, include rotating ring end face 1, along the circumferential direction equally distributedly on rotating ring end face 1 be provided with 8～12 dynamic pressure grooves 2, each dynamic pressure groove 2 be shaped as concave structure, the groove depth of each dynamic pressure groove is 5-15 μ m.The recess of described each dynamic pressure groove 2 all embeds with described ring end face 1 and is the intermediate isolating piece 3 of one.
The rotating ring at the dry gas seals end face grooved place of a kind of two-way rotation that the present invention forms constitutes the dry gas seals friction pair with stationary ring, the dynamic pressure groove forms the required kinetic pressure of fluid in the course of the work, and being flowed to the inside by sealing dam district barrier gas forms dynamic pressure effect to realize that gas is compressed.
Described dynamic pressure groove 2 be by: be formed on the inlet camber line B1B2 on the rotating ring excircle 4, the left-external side arc limit B1C1 and the right lateral arcs limit B2C2 that are connected described inlet camber line B1B2 two ends of symmetry, perpendicular left-external side straight flange C1D1 and the right outside straight flange C2D2 of the Dui Ying the other end that is connected left-external side arc limit B1C1 and right lateral arcs limit B2C2 and elongation line and rotating ring inner circumference 5 respectively, correspondence is connected left-external side straight flange C1D1 and the right outside straight flange C2D2 the other end and left groove root D1E1 that parallels with described rotating ring excircle 4 and rotating ring inner circumference 5 and right groove root D2E2 respectively, and the peripheral E1F1 that is connected intermediate isolating piece 3 by left groove root D1E1 with the right groove root D2E2 the other end, the concave structure that F1F2 and F2E2 constituted.F1E1, F2E2 are respectively the left inboard straight flange and the right inner side straight flange of dynamic pressure groove 2.
Described left-external side arc limit B1C1 and right lateral arcs limit B2C2 are: do the mid point B3 of inlet camber line B1B2 and the center of circle O line and the rotating ring inner circumference 5 of rotating ring excircle 4 and intersect at the A point, with an A be the center of circle, the line B1A of ordering with left end point B1 and the A of inlet camber line B1B2 is that radius is done circle, formed circular arc B1C1 and B2C2 are left-external side arc limit B1C1 and right lateral arcs limit B2C2.
The center of circle of described left groove root D1E1 and right groove root circular arc that D2E2 forms and the center of circle of described rotating ring excircle 4 and rotating ring inner circumference 5 are same center of circle O, wherein, corresponding described center of circle O, the radius of described left groove root D1E1 and right groove root D2E2 is Rg1, the last summit C1/C2 of left-external side straight flange C1D1 and right outside straight flange C2D2 is Rg2 apart from the distance of center of circle O, and the radius of described rotating ring excircle 4 is Ro, and the radius of described rotating ring inner circumference 5 is Ri, and, Ri＜Rg1≤Rg2＜Ro.
Described rotating ring excircle 4, rotating ring inner circumference 5, left groove root D1E1 and right groove root D2E2 and to go up that camber line that summit C1 and C2 be linked to be constituted be four concentric circles in the center of circle with O.Four corresponding respectively being called of concentrically ringed radius R o, Ri, Rg1 and Rg2: seal face external diameter, seal face internal diameter, the first groove root radius and the second groove root radius.
The number range of described Rg1 is Rg1/Ri 〉=1.05; The number range of Rg2 is Rg1≤Rg2≤0.5 (Rg1+R0), and when Rg1=Rg2, the C1 point overlaps with the D1 point, the C2 point overlaps with the D2 point.
With the radius of the corresponding described center of circle O of top camber line F1F2 of the integrally formed intermediate isolating piece 3 of ring end face 1 is Rh, be called spacing block upper topside radius of arc, the height of described intermediate isolating piece 3 is h, and the span of described height h is 0≤h≤2 (R0-Rg1)/3.
The number of degrees that are formed on terminal B 1, B2 and the formed included angle B 1OB2 of center of circle O line at the two ends of the inlet camber line B1B2 on the rotating ring excircle 4 are β, be called dry gas seals inlet circular arc radian, the number of degrees of end points F1, the F2 at the two ends of intermediate isolating piece 3 top camber line F1F2 and the formed angle F1OF2 of center of circle O line are θ, the circular arc radian that is called spacing block width correspondence, described β and θ satisfy 0 °≤θ≤β≤12 °, 5 °≤β≤12 °.
Claims (8)
1. the dry gas seals end face grooved of a two-way rotation, include rotating ring end face (1), it is characterized in that, along the circumferential direction equally distributed 8～12 the dynamic pressure grooves (2) that are provided with on rotating ring end face (1), each dynamic pressure groove (2) be shaped as concave structure, the groove depth of each dynamic pressure groove is 5-15 μ m.
2. the dry gas seals end face grooved of a kind of two-way rotation according to claim 1 is characterized in that, the recess of described each dynamic pressure groove (2) all embeds with described ring end face (1) and is the intermediate isolating piece (3) of one.
3. the dry gas seals end face grooved of a kind of two-way rotation according to claim 2, it is characterized in that, described dynamic pressure groove (2) be by: be formed on the inlet camber line (B1B2) on the rotating ring excircle (4), the left-external side arc limit (B1C1) that is connected described inlet camber line (B1B2) two ends and the right lateral arcs limit (B2C2) of symmetry, corresponding respectively be connected straight flange (C2D2) outside the perpendicular left-external side straight flange (C1D1) of the left-external side arc limit (B1C1) and right lateral arcs limit (B2C2) the other end and elongation line and rotating ring inner circumference (5) and the right side, the correspondence left groove root (D1E1) and the right groove root (D2E2) that are connected left-external side straight flange (C1D1) and right outside straight flange (C2D2) the other end and parallel, and the periphery (E1F1 that is connected intermediate isolating piece (3) by left groove root (D1E1) with right groove root (D2E2) the other end respectively with described rotating ring excircle (4) and rotating ring inner circumference (5), F1F2, F2E2) concave structure that is constituted.
4. the dry gas seals end face grooved of a kind of two-way rotation according to claim 1, it is characterized in that, the center of circle of described left groove root (D1E1) and right groove root (D2E2) circular arc that forms and the center of circle of described rotating ring excircle (4) and rotating ring inner circumference (5) are same center of circle O, wherein, corresponding described center of circle O, the radius of described left groove root (D1E1) and right groove root (D2E2) is Rg1, the last summit (C1/C2) of left-external side straight flange (C1D1) and right outside straight flange (C2D2) is Rg2 apart from the distance of center of circle O, the radius of described rotating ring excircle (4) is Ro, the radius of described rotating ring inner circumference (5) is Ri, and, Ri＜Rg1≤Rg2＜Ro.
5. the dry gas seals end face grooved of a kind of two-way rotation according to claim 4, it is characterized in that, the radius of the corresponding described center of circle O of top camber line (F1F2) of the intermediate isolating piece (3) integrally formed with encircling end face (1) is Rh, the height of described intermediate isolating piece (3) is h, and the span of described height h is 0≤h≤2 (R0-Rg1)/3.
6. the dry gas seals end face grooved of a kind of two-way rotation according to claim 2, it is characterized in that, the number of degrees of end points (B1, B2) and the formed included angle B 1OB2 of center of circle O line that are formed on the two ends of the inlet camber line (B1B2) on the rotating ring excircle (4) are β, the end points at the two ends of intermediate isolating piece (3) top camber line (F1F2) (F1, F2) is θ with the number of degrees of the formed angle F1OF2 of center of circle O line, described β and θ satisfy 0 °≤θ≤β≤12 °, 5 °≤β≤12 °.
7. the dry gas seals end face grooved of a kind of two-way rotation according to claim 2, it is characterized in that, described left-external side arc limit (B1C1) and right lateral arcs limit (B2C2) are: do the mid point B3 of inlet camber line (B1B2) and the center of circle O line and the rotating ring inner circumference (5) of rotating ring excircle (4) and intersect at the A point, be the center of circle, be that radius is done circle that with an A formed two circular arcs are left-external side arc limit (B1C1) and right lateral arcs limit (B2C2) with the left end point B1 and the A line B1A of ordering of inlet camber line (B1B2).
8. the dry gas seals end face grooved of a kind of two-way rotation according to claim 4 is characterized in that, the number range of described Rg1 is Rg1/Ri 〉=1.05; The number range of Rg2 is Rg1≤Rg2≤0.5 (Rg1+R0), and when Rg1=Rg2, the C1 point overlaps with the D1 point, the C2 point overlaps with the D2 point.
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| CN2013101318426A CN103216626A (en) | 2013-04-16 | 2013-04-16 | Dry air-sealed end face groove profile rotating bilaterally |
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| CN2013101318426A CN103216626A (en) | 2013-04-16 | 2013-04-16 | Dry air-sealed end face groove profile rotating bilaterally |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105987175A (en) * | 2016-08-05 | 2016-10-05 | 江西省科学院应用物理研究所 | Mechanical sealing structure with combination of various holes and three-dimensional snowflake-shaped grooves |
| CN107489770A (en) * | 2017-09-29 | 2017-12-19 | 重庆三峡学院 | A kind of two-way mechanical sealing ring |
| CN107906206A (en) * | 2017-12-28 | 2018-04-13 | 温州市天成密封件制造有限公司 | It is a kind of can bidirectional rotation barrel cover type groove end surface mechanical sealing structure |
| CN113348307A (en) * | 2019-02-04 | 2021-09-03 | 伊格尔工业股份有限公司 | Sliding component |
| US11767916B2 (en) | 2019-02-14 | 2023-09-26 | Eagle Industry Co., Ltd. | Sliding components |
| US11821461B2 (en) | 2019-02-15 | 2023-11-21 | Eagle Industry Co., Ltd. | Sliding components |
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| US5222743A (en) * | 1991-02-15 | 1993-06-29 | John Crane (Uk) Limited | Mechanical face seal with trapezoidal shaped grooves on a sealing face |
| CN101469771A (en) * | 2007-12-26 | 2009-07-01 | 丹东克隆集团有限责任公司 | Bidirectionally rotary cascade arc groove mechanical sealing end-face |
| CN101893092A (en) * | 2010-06-29 | 2010-11-24 | 杨惠霞 | Bilaterally rotary gas lubrication non-contact mechanical seal device |
| CN201891839U (en) * | 2010-11-22 | 2011-07-06 | 西安永华集团有限公司 | Dry gas sealing friction pair |
| CN102588605A (en) * | 2012-03-22 | 2012-07-18 | 成都一通密封有限公司 | Bidirectional dry-gas sealed friction pair |
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2013
- 2013-04-16 CN CN2013101318426A patent/CN103216626A/en active Pending
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| US5222743A (en) * | 1991-02-15 | 1993-06-29 | John Crane (Uk) Limited | Mechanical face seal with trapezoidal shaped grooves on a sealing face |
| CN101469771A (en) * | 2007-12-26 | 2009-07-01 | 丹东克隆集团有限责任公司 | Bidirectionally rotary cascade arc groove mechanical sealing end-face |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105987175A (en) * | 2016-08-05 | 2016-10-05 | 江西省科学院应用物理研究所 | Mechanical sealing structure with combination of various holes and three-dimensional snowflake-shaped grooves |
| CN107489770A (en) * | 2017-09-29 | 2017-12-19 | 重庆三峡学院 | A kind of two-way mechanical sealing ring |
| CN107906206A (en) * | 2017-12-28 | 2018-04-13 | 温州市天成密封件制造有限公司 | It is a kind of can bidirectional rotation barrel cover type groove end surface mechanical sealing structure |
| CN113348307A (en) * | 2019-02-04 | 2021-09-03 | 伊格尔工业股份有限公司 | Sliding component |
| CN113348307B (en) * | 2019-02-04 | 2023-11-14 | 伊格尔工业股份有限公司 | Sliding member |
| US11767916B2 (en) | 2019-02-14 | 2023-09-26 | Eagle Industry Co., Ltd. | Sliding components |
| US11821461B2 (en) | 2019-02-15 | 2023-11-21 | Eagle Industry Co., Ltd. | Sliding components |
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Application publication date: 20130724 |