CN201851658U - Combined type polytetrafluoroethylene (PTFE) oil seal with an air vent - Google Patents
Combined type polytetrafluoroethylene (PTFE) oil seal with an air vent Download PDFInfo
- Publication number
- CN201851658U CN201851658U CN2010205195713U CN201020519571U CN201851658U CN 201851658 U CN201851658 U CN 201851658U CN 2010205195713 U CN2010205195713 U CN 2010205195713U CN 201020519571 U CN201020519571 U CN 201020519571U CN 201851658 U CN201851658 U CN 201851658U
- Authority
- CN
- China
- Prior art keywords
- ptfe
- sealing
- sealing lip
- lip sheet
- combined type
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Abstract
The utility model relates to a seal element, in particular to a combined type polytetrafluoroethylene (PTFE) oil seal with an air vent. An oil seal body comprises an outer skeleton, an outer elastic seal body, an inner skeleton, a primary PTFE seal lip, a secondary PTFE seal lip and an elastic seal pad. The oil seal is characterized in that the air vent is arranged in a length space which is located on the lower surface of the secondary PTFE seal lip and is exposed at a bottom gap formed by the secondary PTFE seal lip, the elastic seal pad and the outer skeleton, wherein the upper surface of the length space is in close contact with the primary PTFE seal lip. The closed space of the combined type PTFE oil seal with the air vent is communicated with the outer space, thereby, the free flow of the air is ensured, the ordinary pressure is kept, other external media like dust, sewage and the like cannot pass, the adverse effect of the pump suction effect on the seal lips is eliminated, the bad temperature fluctuation is eliminated, the performance of the oil seal body is prevented from reduction or seal from failure and the stable seal effect and the service life are ensured.
Description
Technical field
The utility model relates to a kind of Sealing, especially a kind of combined type PTFE oil sealing that has vent.
Background technique
Present combined type PTFE oil sealing progressively is widely used because of characteristics such as the self-lubricating property of its PTFE material self excellence, resistance to high temperature, medium-resistances.Conventional its oil seal body of combined type PTFE oil sealing generally is made of outer skeleton, outer elastic sealing element, inner frame, main PTFE sealing lip sheet, secondary PTFE sealing lip sheet, elastic sealing gasket; Outer elastic sealed body is by high temperature vulcanized attached on the outer skeleton; During installation, outer elastic sealed body and seat hole interference fit make oil seal body and seat hole keep relatively-stationary position, thereby realize the sealing to the hole; Elastic sealing gasket, secondary PTFE sealing lip sheet, main PTFE sealing lip sheet, inner frame overlay on the outer skeleton inner bottom plane successively; Carry out the flange group technology by external skeleton, make and axially realize between each assembly closely cooperating, prevent that sealing medium is from seepage between each assembly surface of contact; But when oil seal body was installed and used, main PTFE sealing lip sheet, secondary PTFE sealing lip sheet and running shaft formed lip seal band and confined space; At the sealing strip position, Design and Machining has spirality backflow line on the PTFE sealing lip sheet; So in the running, lip seal band position can form pump and inhale effect, thereby reaches to the sealing of interior media and to the usefulness that stops of external agency invasion; But also because the pump of lip seal band is inhaled effect, the confined space inner air is discharged gradually, form negative pressure, main PTFE sealing lip sheet, secondary PTFE sealing lip sheet are formed pumping action, cause main PTFE sealing lip sheet, secondary PTFE sealing lip sheet generation deformation, thereby the PTFE of winner sealing lip sheet, secondary PTFE sealing lip sheet are increased to the power of holding tightly of running shaft, cause temperature rise to strengthen, seal, running shaft and sealing medium are produced harmful effect, can cause phenomenons such as main PTFE sealing lip sheet, secondary PTFE sealing lip sheet turn over, tear in taking place when serious, cause seal failure.Need a kind of confined space to be connected with space outerpace for this reason, thereby guarantee the air free flow, keep normal pressure, and other external agency, as the combined type PTFE oil sealing that dust, sewage etc. but can't pass through, can eliminate pump like this and inhale the harmful effect that effect is produced the sealing lip sheet, eliminate bad temperature fluctuation, thereby avoid the performance of oil seal body to reduce or seal failure, guarantee stable sealing effect and working life.
The model utility content
It is ubiquitous because the pump of lip seal band is inhaled effect that a kind of combined type PTFE oil sealing that has vent of the present utility model has solved combined type PTFE oil sealing commonly used at present, the confined space inner air is discharged gradually, form negative pressure, to main PTFE sealing lip sheet, secondary PTFE sealing lip sheet forms pumping action, cause main PTFE sealing lip sheet, secondary PTFE sealing lip sheet generation deformation, thereby make the PTFE of winner sealing lip sheet, secondary PTFE sealing lip sheet increases the power of holding tightly of running shaft, cause temperature rise to strengthen, to seal, running shaft and sealing medium produce harmful effect, can cause main PTFE sealing lip sheet when serious, secondary PTFE sealing lip sheet turns in taking place, phenomenon such as tear, cause the problem of seal failure; A kind of combined type PTFE oil sealing that has vent of the present utility model, its confined space is connected with space outerpace, thereby guarantee the air free flow, keep normal pressure, and other external agency can't pass through but as dust, sewage etc., can eliminate pump like this and inhale the harmful effect that effect is produced the sealing lip sheet, eliminate bad temperature fluctuation, thereby avoid the performance of oil seal body to reduce or seal failure, guarantee stable sealing effect and working life.
The technological scheme that the utility model adopted is:
A kind of combined type PTFE oil sealing that has vent, its oil seal body comprises outer skeleton, outer elastic sealed body, inner frame, main PTFE sealing lip sheet, secondary PTFE sealing lip sheet and elastic sealing gasket, it is characterized in that: be positioned at lower surface on the secondary PTFE sealing lip sheet and expose by secondary PTFE sealing lip sheet, elastic sealing gasket with outside skeleton space, formed bottom and upper surface and main PTFE sealing lip sheet the length space that closely contacts be provided with vent.
The described combined type PTFE oil sealing that has vent, the position of its vent is arranged on the position of being partial to the elastic sealing gasket endoporus.
The described combined type PTFE oil sealing that has vent, its elastic sealing gasket, secondary PTFE sealing lip sheet, main PTFE sealing lip sheet, inner frame overlay on the outer skeleton inner bottom plane successively.
The described combined type PTFE oil sealing that has vent, its oil seal body are when installing and using, and main PTFE sealing lip sheet, secondary PTFE sealing lip sheet and running shaft form lip seal band and confined space.
The described combined type PTFE oil sealing that has vent, its bottom space and vent are by contact zones and confined space formation connectivity structure between formed between secondary PTFE sealing lip sheet and the main PTFE sealing lip sheet.
The described combined type PTFE oil sealing that has vent, it is in lip seal band position, main PTFE sealing lip sheet and secondary PTFE sealing lip sheet are provided with wall scroll formula or many formula backflow lines, and the backflow line be shaped as spirality, or zigzag fashion, or waveform, or any combining form of the two above shape wherein.
The described combined type PTFE oil sealing that has vent, its outer skeleton forms the flange composite structure by the flange group technology, makes to closely cooperate axial the realization between each assembly of oil seal body, thereby prevents that sealing medium between each assembly surface of contact seepage taking place.
The described combined type PTFE oil sealing that has vent, its when mounted, an outer elastic sealed body and a seat hole interference fit make oil seal body and seat hole keep a relative fixed position, thereby realize the sealing to the hole.
The described combined type PTFE oil sealing that has vent, its outer elastic sealed body is by high temperature vulcanized attached on the outer skeleton.
The described combined type PTFE oil sealing that has vent, the diameter of its vent is 1-2mm, and its quantity is one or more, and it is shaped as circle, or oval, or polygonal, or non-regular shape, or wherein any combining form of shape more than two kinds.
Like this when work, a kind of combined type PTFE oil sealing that has vent of the present utility model, contact zones between its sheet are because factors such as its contact pressure and surface finishment can guarantee the air free flow, and other external agencys can't pass through as dust, sewage etc.; During running, because inhaling effect, pump cause confined space to produce negative pressure, thereby outside air is produced pumping action, and outside air enters confined space via space, bottom and vent by the connectivity structure that contact zones and confined space constitute between formed between secondary PTFE sealing lip sheet and the main PTFE sealing lip sheet, it is connected with space outerpace, keep normal pressure, thereby avoided because pump is inhaled the harmful effect that effect produces the sealing lip sheet, eliminated bad temperature fluctuation, avoid the performance of oil seal body to reduce or seal failure, guaranteed stable sealing effect and working life.
It is ubiquitous because the pump of lip seal band is inhaled effect that a kind of combined type PTFE oil sealing that has vent of the present utility model has solved combined type PTFE oil sealing commonly used at present, the confined space inner air is discharged gradually, form negative pressure, to main PTFE sealing lip sheet, secondary PTFE sealing lip sheet forms pumping action, cause main PTFE sealing lip sheet, secondary PTFE sealing lip sheet generation deformation, thereby make the PTFE of winner sealing lip sheet, secondary PTFE sealing lip sheet increases the power of holding tightly of running shaft, cause temperature rise to strengthen, to seal, running shaft and sealing medium produce harmful effect, can cause main PTFE sealing lip sheet when serious, secondary PTFE sealing lip sheet turns in taking place, phenomenon such as tear, cause the problem of seal failure; A kind of combined type PTFE oil sealing that has vent of the present utility model, its confined space is connected with space outerpace, thereby guarantee the air free flow, keep normal pressure, and other external agency can't pass through but as dust, sewage etc., can eliminate pump like this and inhale the harmful effect that effect is produced the sealing lip sheet, eliminate bad temperature fluctuation, thereby avoid the performance of oil seal body to reduce or seal failure, guarantee stable sealing effect and working life.
Description of drawings
Fig. 1 is original combined type PTFE oil seal structure schematic representation;
Fig. 2 is a kind of combined type PTFE oil seal structure schematic representation that has vent of the present utility model.
Wherein, 1 is oil seal body, and 2 is outer skeleton, 3 is outer elastic sealed body, and 4 is inner frame, and 5 is main PTFE sealing lip sheet, 6 is secondary PTFE sealing lip sheet, and 7 is elastic sealing gasket, and 8 is the space, bottom, 9 are the backflow line, and 10 is vent, and 11 is running shaft, 12 is the lip seal band, 13 is contact zones between sheet, and 14 is confined space, and 15 is the seat hole.
Embodiment
As depicted in figs. 1 and 2, wherein Fig. 1 is original combined type PTFE oil seal structure schematic representation, and its oil seal body 1 comprises outer skeleton 2, outer elastic sealed body 3, inner frame 4, main PTFE sealing lip sheet 5, secondary PTFE sealing lip sheet 6 and elastic sealing gasket 7; Main PTFE sealing lip sheet 5, secondary PTFE sealing lip sheet 6 form lip seal band 12 and confined space 14 with running shaft 11; In lip seal band 12 positions, main PTFE sealing lip sheet 5 and secondary PTFE sealing lip sheet 6 are provided with backflow line 9.
Fig. 2 is a kind of combined type PTFE oil seal structure schematic representation that has vent of the present utility model, its oil seal body 1 comprises outer skeleton 2, outer elastic sealed body 3, inner frame 4, main PTFE sealing lip sheet 5, secondary PTFE sealing lip sheet 6 and elastic sealing gasket 7, it is characterized in that: on secondary PTFE sealing lip sheet 6, be positioned at lower surface and expose by secondary PTFE sealing lip sheet 6, in 5 length spaces that closely contact of elastic sealing gasket 7 and outer skeleton space 8,2 formed bottom and upper surface and main PTFE sealing lip sheet, the diameter that is provided with a circle in the position of being partial to elastic sealing gasket 7 endoporus is the vent 10 of 2mm.Elastic sealing gasket 7, secondary PTFE sealing lip sheet 6, main PTFE sealing lip sheet 5, inner frame 4 overlay on the outer skeleton 2 inner bottom planes successively; Oil seal body 1 is when installing and using, and main PTFE sealing lip sheet 5, secondary PTFE sealing lip sheet 6 form lip seal band 12 and confined space 14 with running shaft 11; Bottom space 8 and vent 10 by between secondary PTFE sealing lip sheet 6 and the main PTFE sealing lip sheet 5 between formed contact zones 13 constitute connectivity structures with confined space 14; In lip seal band 12 positions, main PTFE sealing lip sheet 5 and secondary PTFE sealing lip sheet 6 are provided with wall scroll formula spirality backflow line 9; Outer skeleton 2 forms the flange composite structure by the flange group technology, makes to closely cooperate axial the realization between oil seal body 1 each assembly, thereby prevents that sealing medium between each assembly surface of contact seepage taking place; When mounted, outer elastic sealed body 3 is by high temperature vulcanized attached on the outer skeleton 2, and itself and seat hole 15 interference fit, makes oil seal body 1 and 15 maintenance relative fixed positions, seat hole, thereby realization is to the sealing in hole.
Like this when work, a kind of combined type PTFE oil sealing that has vent of the present utility model, contact zones 13 between its sheet are because factors such as its contact pressure and surface finishment can guarantee the air free flow, and other external agencys can't pass through as dust, sewage etc.; During running, because inhaling effect, pump cause confined space 14 to produce negative pressure, thereby outside air is produced pumping action, and outside air via space, bottom 8 and vent 10 by between secondary PTFE sealing lip sheet 6 and the main PTFE sealing lip sheet 5 between formed contact zones 13 enter confined space 14 with the connectivity structure that confined space 14 constitutes, it is connected with space outerpace, keep normal pressure, thereby avoided because pump is inhaled the harmful effect that effect produces the sealing lip sheet, eliminated bad temperature fluctuation, avoid the performance of oil seal body 1 to reduce or seal failure, guaranteed stable sealing effect and working life.
With embodiment 1, different is, be positioned at lower surface on the secondary PTFE sealing lip sheet 6 and expose by secondary PTFE sealing lip sheet 6, elastic sealing gasket 7 with outside skeleton space 8,2 formed bottom and upper surface and 5 length spaces that closely contact of main PTFE sealing lip sheet, the round vent 10 that to be provided with two diameters in the position of being partial to elastic sealing gasket 7 endoporus be 1mm; Lip seal band 12 positions, main PTFE sealing lip sheet 5 and secondary PTFE sealing lip sheet 6 are provided with two formula zigzag fashion backflow lines 9.
With embodiment 1, different is, be positioned at lower surface on the secondary PTFE sealing lip sheet 6 and expose by secondary PTFE sealing lip sheet 6, elastic sealing gasket 7 with outside skeleton space 8,2 formed bottom and upper surface and 5 length spaces that closely contact of main PTFE sealing lip sheet, the round vent 10 that to be provided with two diameters in the position of being partial to elastic sealing gasket 7 endoporus be 1.5mm; In lip seal band 12 positions, main PTFE sealing lip sheet 5 and secondary PTFE sealing lip sheet 6 are provided with wall scroll formula spirality backflow line 9.
It is ubiquitous because the pump of lip seal band is inhaled effect that a kind of combined type PTFE oil sealing that has vent of the present utility model has solved combined type PTFE oil sealing commonly used at present, the confined space inner air is discharged gradually, form negative pressure, to main PTFE sealing lip sheet, secondary PTFE sealing lip sheet forms pumping action, cause main PTFE sealing lip sheet, secondary PTFE sealing lip sheet generation deformation, thereby make the PTFE of winner sealing lip sheet, secondary PTFE sealing lip sheet increases the power of holding tightly of running shaft, cause temperature rise to strengthen, to seal, running shaft and sealing medium produce harmful effect, can cause main PTFE sealing lip sheet when serious, secondary PTFE sealing lip sheet turns in taking place, phenomenon such as tear, cause the problem of seal failure; A kind of combined type PTFE oil sealing that has vent of the present utility model, its confined space is connected with space outerpace, thereby guarantee the air free flow, keep normal pressure, and other external agency can't pass through but as dust, sewage etc., can eliminate pump like this and inhale the harmful effect that effect is produced the sealing lip sheet, eliminate bad temperature fluctuation, thereby avoid the performance of oil seal body to reduce or seal failure, guarantee stable sealing effect and working life.
Obviously, the foregoing description of the present utility model only is for the utility model example clearly is described, and is not to be qualification to mode of execution of the present utility model.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here can't give exhaustive to all mode of executions.Everyly belong to the row that conspicuous variation that the technical solution of the utility model extends out or change still are in protection domain of the present utility model.
Claims (10)
1. combined type PTFE oil sealing that has vent, its oil seal body (1) comprises outer skeleton (2), outer elastic sealed body (3), inner frame (4), main PTFE sealing lip sheet (5), secondary PTFE sealing lip sheet (6) and elastic sealing gasket (7), it is characterized in that: be positioned at lower surface on the secondary PTFE sealing lip sheet (6) and expose by secondary PTFE sealing lip sheet (6), elastic sealing gasket (7) with outside space, the formed bottom of skeleton (2) (8) and upper surface and main PTFE sealing lip sheet (5) the length space that closely contacts be provided with vent (10).
2. the combined type PTFE oil sealing that has vent according to claim 1, it is characterized in that: the position of vent (10) is arranged on the position of being partial to elastic sealing gasket (7) endoporus.
3. the combined type PTFE oil sealing that has vent according to claim 1 is characterized in that: elastic sealing gasket (7), secondary PTFE sealing lip sheet (6), main PTFE sealing lip sheet (5), inner frame (4) overlay on outer skeleton (2) the inner bottom plane successively.
4. the combined type PTFE oil sealing that has vent according to claim 1, it is characterized in that: oil seal body (1) is when installing and using, and main PTFE sealing lip sheet (5), secondary PTFE sealing lip sheet (6) form lip seal band (12) and confined space (14) with running shaft (11).
5. the combined type PTFE oil sealing that has vent according to claim 4 is characterized in that: space, bottom (8) and vent (10) are by contact zones (13) and confined space (14) formation connectivity structure between formed between secondary PTFE sealing lip sheet (6) and the main PTFE sealing lip sheet (5).
6. the combined type PTFE oil sealing that has vent according to claim 4, it is characterized in that: in lip seal band (12) position, main PTFE sealing lip sheet (5) and secondary PTFE sealing lip sheet (6) are provided with wall scroll formula or many formula backflow lines (9), and backflow line (9) be shaped as spirality, or zigzag fashion, or waveform, or any combining form of the two above shape wherein.
7. the combined type PTFE oil sealing that has vent according to claim 1 is characterized in that: outer skeleton (2) forms the flange composite structure by the flange group technology, makes to closely cooperate axial the realization between each assembly of oil seal body (1).
8. the combined type PTFE oil sealing that has vent according to claim 1, it is characterized in that: when mounted, outer elastic sealed body (3) and seat hole (15) interference fit make oil seal body (1) and seat hole (15) keep the relative fixed position, thereby realize the sealing to the hole.
9. the combined type PTFE oil sealing that has vent according to claim 1 is characterized in that: outer elastic sealed body (3) is by high temperature vulcanized attached on the outer skeleton (2).
10. the combined type PTFE oil sealing that has vent according to claim 1, it is characterized in that: the diameter of vent (10) is 1-2mm, its quantity is one or more, it is shaped as circle, or oval, or polygonal, or wherein any combining form of shape more than two kinds.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205195713U CN201851658U (en) | 2010-09-07 | 2010-09-07 | Combined type polytetrafluoroethylene (PTFE) oil seal with an air vent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205195713U CN201851658U (en) | 2010-09-07 | 2010-09-07 | Combined type polytetrafluoroethylene (PTFE) oil seal with an air vent |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201851658U true CN201851658U (en) | 2011-06-01 |
Family
ID=44094049
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205195713U Expired - Fee Related CN201851658U (en) | 2010-09-07 | 2010-09-07 | Combined type polytetrafluoroethylene (PTFE) oil seal with an air vent |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201851658U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101936397A (en) * | 2010-09-07 | 2011-01-05 | 青岛开世密封工业有限公司 | Combined PTFE oil seal with vent hole and manufacturing method and mounting method thereof |
| CN111750107A (en) * | 2019-03-28 | 2020-10-09 | 舍弗勒技术股份两合公司 | Framework for sealing device and sealing device |
-
2010
- 2010-09-07 CN CN2010205195713U patent/CN201851658U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101936397A (en) * | 2010-09-07 | 2011-01-05 | 青岛开世密封工业有限公司 | Combined PTFE oil seal with vent hole and manufacturing method and mounting method thereof |
| CN111750107A (en) * | 2019-03-28 | 2020-10-09 | 舍弗勒技术股份两合公司 | Framework for sealing device and sealing device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201795048U (en) | Sealing structure for multi-lip bidirectional composite dust cap and bearing | |
| CN201851658U (en) | Combined type polytetrafluoroethylene (PTFE) oil seal with an air vent | |
| CN101936397A (en) | Combined PTFE oil seal with vent hole and manufacturing method and mounting method thereof | |
| CN202250293U (en) | Plane sealing ring | |
| CN208268410U (en) | A kind of dust-proof outside framework oil seal | |
| CN201844072U (en) | Steel ball type check valve | |
| CN210371945U (en) | Wind-powered electricity generation gear box input seal structure | |
| CN211574257U (en) | Limited grease discharging main shaft sealing device | |
| CN202118258U (en) | An oil seal with an oil return thread | |
| CN2795490Y (en) | Novel machine oil pum assembly | |
| CN201496557U (en) | Ocv oil seal | |
| CN201487211U (en) | Bearing combination oil seal | |
| CN205401879U (en) | Rotation type variable frequency switching valve | |
| CN201347853Y (en) | Sealing device for intermediate rod of drill pump | |
| CN204609955U (en) | A kind of Multi-tooth corrugated sheet elastic sealing device | |
| CN202451836U (en) | Reversed-lip polytetrafluoroethylene (PTFE) structural oil seal | |
| CN203614142U (en) | Building block technology-based modular steam seal | |
| CN102235512A (en) | Cage type single seat control valve | |
| CN202864470U (en) | Material supply valve with good sealing performance | |
| CN201705937U (en) | Combined type sealing ring with antifriction distance ring | |
| CN206290708U (en) | It is directed to the two-lid sealing structure of Vehicle loaded pump | |
| CN217130330U (en) | Sliding sealing device for shaft with dynamic and static modes | |
| CN205806482U (en) | Combination hydraulic rotary shaft oil seal | |
| CN215672698U (en) | High leakproofness hydrogen circulating pump | |
| CN219975337U (en) | Double-lip dustproof oil seal |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110601 Termination date: 20130907 |