CN109139926B - Dynamic pressure type end face sealing structure resistant to impact vibration - Google Patents
Dynamic pressure type end face sealing structure resistant to impact vibration Download PDFInfo
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- CN109139926B CN109139926B CN201811286179.6A CN201811286179A CN109139926B CN 109139926 B CN109139926 B CN 109139926B CN 201811286179 A CN201811286179 A CN 201811286179A CN 109139926 B CN109139926 B CN 109139926B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/34—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member
- F16J15/3464—Mounting of the seal
- F16J15/3476—Means for minimising vibrations of the slip-ring
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Combined Devices Of Dampers And Springs (AREA)
- Sealing Devices (AREA)
Abstract
A dynamic pressure type end face sealing structure resistant to impact vibration belongs to the technical field of mechanical end face sealing structure design. At least one sealing ring in the dynamic ring or the static ring is a shock-resistant and vibration-resistant sealing ring; the shock-vibration-resistant sealing ring comprises a working ring, a supporting ring, a fan-shaped rubber pad, a spring, a first sealing ring and a second sealing ring; one side of the support ring is provided with an annular groove along the axial direction. The dynamic pressure type end face sealing structure capable of resisting impact vibration provided by the invention utilizes the combination of the rubber pad and the spring to be arranged in the sealing ring to absorb and relieve the impact vibration, can be well suitable for the harsh working environment of a movable type rotating unit, a variable working condition or frequent start and stop of the rotating unit, and has the advantages of good dynamic following performance, strong adaptability, stable fluid film, long service life and the like.
Description
Technical Field
The invention relates to the technical field of mechanical end face sealing structure design, in particular to an impact vibration resistant dynamic pressure type end face sealing structure, which is particularly suitable for shaft end sealing devices of various high-speed rotating machines.
Background
The dynamic pressure type end face seal has many performance advantages such as low leakage, long service life, low power consumption and the like, and is widely applied to shaft end sealing devices of rotating machinery such as centrifugal compressors, centrifugal pumps and the like. However, with the further development of modern industry, the rotary machine is required to be capable of adapting to higher parameter working conditions, particularly, under high-speed conditions, shaft system vibration is severe, particularly, under the large-amplitude impact vibration existing during starting, stopping or changing working conditions, the sealing ring of the existing dynamic pressure type end face seal is very easy to crash and break, and finally, the seal failure is caused, so that economic loss or major safety accidents are caused.
Disclosure of Invention
The invention aims to solve the problem that the existing dynamic pressure type end face seal has insufficient capacity of resisting external impact vibration, and provides a dynamic pressure type end face seal structure with impact vibration resistance.
In order to realize the purpose, the invention is realized by the following technical scheme:
a dynamic pressure type end face sealing structure resisting impact vibration comprises a dynamic ring and a static ring with sealed end faces; the method is characterized in that:
at least one sealing ring in the dynamic ring or the static ring is a shock-resistant and vibration-resistant sealing ring; the shock-vibration-resistant sealing ring comprises a working ring, a supporting ring, a fan-shaped rubber pad, a spring, a first sealing ring and a second sealing ring; the dynamic pressure groove is arranged on the sealing end surface of at least one of the working ring and the sealing ring matched with the working ring, and the anti-rotation bulge is arranged on the outer diameter side of the working ring; an annular groove is formed in one side of the support ring along the axial direction, a plurality of fan-shaped grooves are uniformly formed in the bottom surface of the annular groove along the circumferential direction, a first sealing ring groove and a second sealing ring groove are respectively formed in the cylindrical wall surfaces of the outer diameter side and the inner diameter side of the annular groove, and an anti-rotation groove in clearance fit with the anti-rotation protrusion is formed in the annular surface, close to the outer diameter, of one side, provided with the annular groove, of the support ring; a circular through hole is formed in the center of the fan-shaped rubber pad, the fan-shaped rubber pads are sequentially laid in the fan-shaped grooves in a clearance fit mode, the springs are sequentially placed in the circular through holes in the fan-shaped rubber pads, and the heights of the springs are the same as those of the fan-shaped rubber pads; the first sealing ring is arranged in the first sealing ring groove, the second sealing ring is arranged in the second sealing ring groove, the working ring is inserted into the annular groove of the support ring through clearance fit until the back of the working ring is pressed on the surface of the fan-shaped rubber pad, sealing between the working ring and the support ring is realized through extrusion of the first sealing ring and the second sealing ring, and relative rotation limitation between the working ring and the support ring is realized through the cooperation of the anti-rotation protrusion and the anti-rotation groove.
Preferably, the end face seal is in a stable operation process, and when the impact vibration resistant seal ring is under the action of external axial direction pressure, the axial direction compression deformation amount of the fan-shaped rubber pad and the spring is 50-500 μm.
The invention has the following beneficial effects: the dynamic pressure type end face sealing structure capable of resisting impact vibration provided by the invention utilizes the combination of the rubber pad and the spring to be arranged in the sealing ring to absorb and relieve the impact vibration, can be well suitable for the harsh working environment of a movable type rotating unit, a variable working condition or frequent start and stop of the rotating unit, and has the advantages of good dynamic following performance, strong adaptability, stable fluid film, long service life and the like.
Drawings
FIG. 1 is a three-dimensional exploded schematic view of the structure of the present invention;
FIG. 2 is a cross-sectional view of an assembly of the structure of the present invention;
FIG. 3 is an isometric view of a working ring of the construction of the present invention;
FIG. 4 is an isometric view of a support ring of the construction of the present invention;
FIG. 5 is a top view of a support ring of the present construction;
FIG. 6 is an isometric view of a fan-shaped rubber pad of the present invention construction.
In the figure: 1-working ring, 11-dynamic pressure groove, 12-anti-rotation protrusion, 2-supporting ring, 21-sector groove, 22-anti-rotation groove, 23-first sealing ring groove, 24-second sealing ring groove, 3-sector rubber pad, 31-circular through hole, 4-spring, 5-first sealing ring and 6-second sealing ring.
Detailed Description
The technical solution of the present invention will be described in detail below with reference to the accompanying drawings.
Referring to fig. 1 to 6, the dynamic pressure type end face sealing structure of the invention, which is resistant to impact vibration, comprises a moving ring and a stationary ring with end faces sealed; the method is characterized in that:
at least one sealing ring in the dynamic ring or the static ring is a shock-resistant and vibration-resistant sealing ring; the shock-vibration-resistant sealing ring comprises a working ring 1, a supporting ring 2, a fan-shaped rubber pad 3, a spring 4, a first sealing ring 5 and a second sealing ring 6; the dynamic pressure groove 11 is arranged on the sealing end surface of at least one of the working ring 1 and the sealing ring matched with the working ring 1, and the anti-rotation bulge 12 is arranged on the outer diameter side of the working ring 1; an annular groove is formed in one side of the support ring 2 along the axial direction, a plurality of fan-shaped grooves 21 are uniformly formed in the bottom surface of the annular groove along the circumferential direction, a first seal ring groove 23 and a second seal ring groove 24 are respectively formed in the cylindrical wall surfaces of the outer diameter side and the inner diameter side of the annular groove, and an anti-rotation groove 22 in clearance fit with the anti-rotation protrusion 12 is formed in the ring surface of the support ring 2 close to the outer diameter side where the annular groove is formed; a circular through hole 31 is formed in the center of the fan-shaped rubber pad 3, the fan-shaped rubber pads 3 are sequentially laid in the fan-shaped groove 21 in a clearance fit mode, the springs 4 are sequentially placed in the circular through holes 31 in the fan-shaped rubber pads 3, and the heights of the springs 4 are the same as the heights of the fan-shaped rubber pads 3; first sealing washer 5 install in first sealing washer slot 23, second sealing washer 6 install in second sealing washer slot 24, work ring 1 inserts through clearance fit in the annular groove of support ring 2 until work ring 1's the back pressure is in fan-shaped rubber pad on the surface, realizes the sealed between work ring 1 and the support ring 2 through the extrusion of first sealing washer 5 and second sealing washer 6, and through prevent changeing protruding 12 and prevent changeing the cooperation of recess 22 and realize the restriction of relative rotation between work ring 1 and the support ring 2.
Specifically, in the stable operation process of end face sealing, when the impact vibration resistant sealing ring is under the action of external axial direction pressure, the axial direction compression deformation of the fan-shaped rubber pad 3 and the spring 4 is 50-500 μm.
The working process of the invention is as follows:
in the working process of the impact vibration resistant dynamic pressure type end face seal, when fluid flows at a high speed along the circumferential direction of the seal ring, the fluid is extruded at the groove root of the dynamic pressure groove to form a dynamic pressure effect, so that the seal end face is opened to form a micron-sized fluid film with certain rigidity and damping characteristics, when an impact vibration or variable working conditions occur to a shaft system, the film thickness of the fluid film is changed rapidly, the rigidity and the damping characteristics are also changed rapidly, and the fan-shaped rubber pad 3, the spring 4, the first seal ring 5 and the second seal ring 6 which jointly support the working ring 1 can sense the rigidity and the damping change of the fluid film to be adjusted immediately through deformation, so that the dynamic stability of the film thickness is ensured. If the impact vibration or the variable working condition influence from the outside is large, so that the movable ring and the static ring collide, the fan-shaped rubber pad 3, the spring 4, the first sealing ring 5 and the second sealing ring 6 which jointly support the working ring 1 can absorb the impact energy generated by the collision to the maximum extent, the harm generated by the collision is weakened, and the sealing ring is prevented from being crushed.
The above embodiments are illustrative of the present invention, and are not intended to limit the present invention, and any simple modifications of the present invention are within the scope of the present invention.
Claims (2)
1. A dynamic pressure type end face sealing structure resisting impact vibration comprises a dynamic ring and a static ring with sealed end faces; the method is characterized in that: at least one sealing ring in the dynamic ring or the static ring is a shock-resistant and vibration-resistant sealing ring; the shock-vibration-resistant sealing ring comprises a working ring (1), a supporting ring (2), a fan-shaped rubber pad (3), a spring (4), a first sealing ring (5) and a second sealing ring (6); a dynamic pressure groove (11) is formed in the sealing end face of at least one sealing ring in the working ring (1) or the sealing ring matched with the working ring (1), and an anti-rotation bulge (12) is arranged on the outer diameter side of the working ring (1); an annular groove is formed in one side of the support ring (2) along the axial direction, a plurality of fan-shaped grooves (21) are uniformly formed in the bottom surface of the annular groove along the circumferential direction, a first seal ring groove (23) and a second seal ring groove (24) are respectively formed in the cylindrical wall surface of the outer diameter side and the inner diameter side of the annular groove, and an anti-rotation groove (22) in clearance fit with the anti-rotation protrusion (12) is formed in the ring surface, close to the outer diameter, of one side, provided with the annular groove, of the support ring (2); a circular through hole (31) is formed in the center of the fan-shaped rubber pad (3), the fan-shaped rubber pads (3) are sequentially laid in the fan-shaped grooves (21) in a clearance fit mode, the springs (4) are sequentially placed in the circular through holes (31) in the fan-shaped rubber pads (3), and the heights of the springs (4) are the same as those of the fan-shaped rubber pads (3); first sealing washer (5) install in first sealing washer slot (23), second sealing washer (6) install in second sealing washer slot (24), insert through clearance fit working ring (1) in the annular groove of support ring (2) until the back pressure of working ring (1) is in on the surface of fan-shaped rubber pad, realize the sealing between working ring (1) and support ring (2) through the extrusion of first sealing washer (5) and second sealing washer (6), and through prevent changeing protruding (12) and prevent the cooperation of changeing recess (22) and realize the restriction of relative rotation between working ring (1) and support ring (2).
2. The dynamic pressure type end face seal structure resistant to impact vibration according to claim 1, characterized in that: in the stable operation process of end face sealing, when the impact vibration resistant sealing ring is under the action of external axial direction pressure, the axial direction compression deformation of the fan-shaped rubber gasket (3) and the spring (4) is 50-500 mu m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811286179.6A CN109139926B (en) | 2018-10-31 | 2018-10-31 | Dynamic pressure type end face sealing structure resistant to impact vibration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811286179.6A CN109139926B (en) | 2018-10-31 | 2018-10-31 | Dynamic pressure type end face sealing structure resistant to impact vibration |
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| Publication Number | Publication Date |
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| CN109139926A CN109139926A (en) | 2019-01-04 |
| CN109139926B true CN109139926B (en) | 2020-02-21 |
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| CN201811286179.6A Active CN109139926B (en) | 2018-10-31 | 2018-10-31 | Dynamic pressure type end face sealing structure resistant to impact vibration |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110094507B (en) * | 2019-04-22 | 2020-09-15 | 安徽绿环泵业有限公司 | Water seal device of water supply and drainage pump |
| CN110725364A (en) * | 2019-10-24 | 2020-01-24 | 马鞍山楚锐科技信息咨询有限公司 | Relay water tank |
| CN110822084B (en) * | 2019-11-19 | 2021-12-21 | 潍柴动力股份有限公司 | Sealing member and engine |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2526608Y (en) * | 2002-03-12 | 2002-12-18 | 江苏亚太水工机械集团公司 | Self-pressure coupled sealer |
| CN101532568A (en) * | 2009-03-24 | 2009-09-16 | 宁波东联密封件有限公司 | Self-balanced mechanical seal |
| CN204921983U (en) * | 2015-08-05 | 2015-12-30 | 河南柴油机重工有限责任公司 | Novel gasket |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB0312185D0 (en) * | 2003-05-28 | 2003-07-02 | Aesseal Plc | A seal damper |
| CN104179974B (en) * | 2014-07-21 | 2016-07-06 | 浙江工业大学 | Anti-axial vibration type mechanically-sealing apparatus |
| CN204677666U (en) * | 2015-05-28 | 2015-09-30 | 储成霞 | A kind of efficient damping device |
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2018
- 2018-10-31 CN CN201811286179.6A patent/CN109139926B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2526608Y (en) * | 2002-03-12 | 2002-12-18 | 江苏亚太水工机械集团公司 | Self-pressure coupled sealer |
| CN101532568A (en) * | 2009-03-24 | 2009-09-16 | 宁波东联密封件有限公司 | Self-balanced mechanical seal |
| CN204921983U (en) * | 2015-08-05 | 2015-12-30 | 河南柴油机重工有限责任公司 | Novel gasket |
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| CN109139926A (en) | 2019-01-04 |
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