CN111442088A - Combined polytetrafluoroethylene oil seal - Google Patents
Combined polytetrafluoroethylene oil seal Download PDFInfo
- Publication number
- CN111442088A CN111442088A CN202010405144.0A CN202010405144A CN111442088A CN 111442088 A CN111442088 A CN 111442088A CN 202010405144 A CN202010405144 A CN 202010405144A CN 111442088 A CN111442088 A CN 111442088A
- Authority
- CN
- China
- Prior art keywords
- metal framework
- sealing ring
- oil seal
- sealing lip
- lip
- 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.)
- Pending
Links
- -1 polytetrafluoroethylene Polymers 0.000 title claims abstract description 26
- 229920001343 polytetrafluoroethylene Polymers 0.000 title claims abstract description 26
- 239000004810 polytetrafluoroethylene Substances 0.000 title claims abstract description 26
- 238000007789 sealing Methods 0.000 claims abstract description 71
- 239000002184 metal Substances 0.000 claims abstract description 54
- 229920001971 elastomer Polymers 0.000 claims abstract description 16
- 230000002093 peripheral effect Effects 0.000 claims abstract description 13
- 230000007704 transition Effects 0.000 claims abstract description 12
- 230000003068 static effect Effects 0.000 claims abstract description 11
- 239000000463 material Substances 0.000 claims description 7
- 229910000975 Carbon steel Inorganic materials 0.000 claims description 4
- 239000010962 carbon steel Substances 0.000 claims description 4
- 229920000459 Nitrile rubber Polymers 0.000 claims description 3
- 239000003921 oil Substances 0.000 description 25
- 230000000694 effects Effects 0.000 description 3
- 239000012535 impurity Substances 0.000 description 2
- 239000010687 lubricating oil Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
Images
Classifications
-
- 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
- F16J15/18—Sealings between relatively-moving surfaces with stuffing-boxes for elastic or plastic packings
- F16J15/20—Packing materials therefor
-
- 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
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3204—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip
- F16J15/3232—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip having two or more lips
-
- 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
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3248—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings provided with casings or supports
- F16J15/3252—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings provided with casings or supports with rigid casings or supports
-
- 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
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3284—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings characterised by their structure; Selection of materials
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sealing With Elastic Sealing Lips (AREA)
Abstract
The invention discloses a combined polytetrafluoroethylene oil seal which comprises a peripheral rubber sealing ring, a metal framework and an internal main sealing lip, wherein the peripheral rubber sealing ring comprises a static sealing ring, a dynamic sealing ring and a transition part, the inner ring periphery of the dynamic sealing ring is provided with an auxiliary sealing lip, the metal framework comprises a first metal framework and a second metal framework, the cross sections of the first metal framework and the second metal framework are both L-shaped structures, one end of the first metal framework is attached to the inner side of the static sealing ring, the other end of the first metal framework is embedded into the transition part, the internal main sealing lip comprises a fixed end and a free end, the fixed end is linear and is attached to the transition part, the free end is arc-shaped and extends in the opposite direction of the auxiliary sealing lip, and the two ends of the second metal framework are respectively attached to the first metal framework and the fixed end.
Description
Technical Field
The invention relates to a combined polytetrafluoroethylene oil seal, and belongs to the technical field of sealing elements.
Background
In industrial production equipment, an oil seal is one of widely used sealing elements, and the oil seal can isolate and enclose lubricating oil in a predetermined space and prevent the lubricating oil from leaking out of the predetermined space. Normally, the rotating member passes through a seal lip of an oil seal, and an inner peripheral surface of the seal lip of the oil seal contacts an outer peripheral surface of the rotating member to form a seal surface. Sliding friction is formed between the sealing lip and the rotating component, and a good sealing state is kept between the sealing lip of the oil seal and the rotating component.
The difference between the polytetrafluoroethylene oil seal and the common rubber rotary oil seal is that a polytetrafluoroethylene sheet is used for replacing a rubber lip, and when the existing polytetrafluoroethylene oil seal is installed, the polytetrafluoroethylene sealing lip is easy to deform, so that the sealing effect is influenced.
Disclosure of Invention
The purpose is as follows: in order to overcome the problem that a polytetrafluoroethylene oil seal in the prior art is easy to deform, the invention provides a combined polytetrafluoroethylene oil seal.
The technical scheme is as follows: in order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a combined polytetrafluoroethylene oil seal comprises a peripheral rubber sealing ring, a metal framework and an internal main sealing lip;
the peripheral rubber sealing ring comprises a static sealing ring, a dynamic sealing ring and a transition part for connecting the static sealing ring and the dynamic sealing ring, wherein the inner ring periphery of the dynamic sealing ring is provided with a secondary sealing lip, the metal framework comprises a first metal framework and a second metal framework, the sections of the first metal framework and the second metal framework are both L-shaped structures, one end of the first metal framework is attached to the inner side of the static sealing ring, and the other end of the first metal framework is embedded into the transition part;
the inner main sealing lip comprises a fixed end and a free end, the fixed end is linear and is attached to the transition part of the peripheral rubber sealing ring, the free end is arc-shaped, and the free end of the inner main sealing lip and the auxiliary sealing lip extend in opposite directions respectively;
and two ends of the second metal framework are respectively attached to the fixed ends of the first metal framework and the inner main sealing lip.
Furthermore, an oil return groove structure is arranged at the free end of the inner main sealing lip.
Further, the inner ring diameter of the inner primary seal lip is smaller than the inner ring diameter of the secondary seal lip.
Furthermore, the axial tail end of the first metal framework is bent inwards by 90 degrees and is wrapped outside the axial tail end of the second metal framework.
Further, the first metal framework and the second metal framework are made of carbon steel materials.
Further, the inner primary seal lip is made of a polytetrafluoroethylene material.
Further, the rubber sealing ring is made of hydrogenated nitrile rubber.
Has the advantages that: according to the combined polytetrafluoroethylene oil seal, the oil return groove is designed on the polytetrafluoroethylene lip, so that the combined polytetrafluoroethylene oil seal has excellent chemical resistance, high and low temperature resistance and low friction coefficient, and is applied to occasions with extremely high rotating speed or needing to reduce the temperature of the lip. The design of the auxiliary sealing lip can effectively block impurities, so that the effect of the internal main sealing lip is protected, and the service life of the oil seal is prolonged; the combined metal framework structure is adopted, the metal framework is made of carbon steel materials, the rigidity of the oil seal is enhanced, the oil seal cannot be easily deformed, the second metal framework on the inner side can also block the pressure of part of sealing media on the oil seal, and therefore the deformation degree of the polytetrafluoroethylene sealing lip is reduced.
Drawings
FIG. 1 is a schematic cross-sectional view of the present invention;
fig. 2 is a partial cross-sectional view of fig. 1.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
As shown in fig. 1 and 2, a combined polytetrafluoroethylene oil seal comprises a peripheral rubber sealing ring, a metal framework and an inner main sealing lip 4.
Peripheral rubber seal ring includes static sealing ring 11, dynamic seal ring 12 and connects the transition portion 13 of static sealing ring 11 and dynamic seal ring 12, the inner ring week portion of dynamic seal ring 12 sets up vice seal lip 14, and vice seal lip 14 has the elasticity peculiarity, can effectively block impurity, plays the effect of the inside main seal lip 4 of protection to the life of extension oil blanket, metal framework includes first metal framework 2, second metal framework 3, first metal framework 2, second metal framework 3's cross-section is L shape structure, the one end laminating of first metal framework 2 is inboard at static sealing ring 11, other end embedding transition portion 13.
The inner main sealing lip 4 comprises a fixed end 41 and a free end 42, the fixed end 41 is linear and is attached to the transition part 13 of the peripheral rubber sealing ring, and the free end 42 is arc-shaped and is provided with an oil return groove structure; the free end 42 of the inner primary seal lip 4 and the secondary seal lip 14 extend in opposite directions, respectively.
The two ends of the second metal framework 3 are respectively attached to the fixed ends 41 of the first metal framework 2 and the inner main sealing lip 4, so that the rigidity of the oil seal is further enhanced, and meanwhile, the pressure brought by partial sealing media is blocked. The axial tail end of the first metal framework 2 is bent inwards by 90 degrees and is wrapped outside the axial tail end of the second metal framework 3. The first metal framework 2 and the second metal framework 3 are made of carbon steel materials.
The inner ring diameter of the inner main sealing lip 4 is smaller than that of the auxiliary sealing lip 14, namely the inner main sealing lip 4 is designed in an interference fit mode.
The inner main sealing lip 4 is made of polytetrafluoroethylene material and has excellent chemical resistance, high and low temperature resistance, self-lubricating property and friction resistance. The rubber sealing ring is made of hydrogenated nitrile rubber.
The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.
Claims (7)
1. A combined polytetrafluoroethylene oil seal is characterized in that: comprises a peripheral rubber sealing ring, a metal framework and an internal main sealing lip;
the peripheral rubber sealing ring comprises a static sealing ring, a dynamic sealing ring and a transition part for connecting the static sealing ring and the dynamic sealing ring, wherein the inner ring periphery of the dynamic sealing ring is provided with a secondary sealing lip, the metal framework comprises a first metal framework and a second metal framework, the sections of the first metal framework and the second metal framework are both L-shaped structures, one end of the first metal framework is attached to the inner side of the static sealing ring, and the other end of the first metal framework is embedded into the transition part;
the inner main sealing lip comprises a fixed end and a free end, the fixed end is linear and is attached to the transition part of the peripheral rubber sealing ring, the free end is arc-shaped, and the free end of the inner main sealing lip and the auxiliary sealing lip extend in opposite directions respectively;
and two ends of the second metal framework are respectively attached to the fixed ends of the first metal framework and the inner main sealing lip.
2. The combination polytetrafluoroethylene oil seal according to claim 1, wherein: and the free end of the inner main sealing lip is provided with an oil return groove structure.
3. The combination polytetrafluoroethylene oil seal according to claim 1, wherein: the inner ring diameter of the inner main sealing lip is smaller than that of the auxiliary sealing lip.
4. The combination polytetrafluoroethylene oil seal according to claim 1, wherein: the axial tail end of the first metal framework is bent inwards by 90 degrees and is wrapped outside the axial tail end of the second metal framework.
5. The combination polytetrafluoroethylene oil seal according to claim 1, wherein: the first metal framework and the second metal framework are made of carbon steel materials.
6. The combination polytetrafluoroethylene oil seal according to claim 1, wherein: the inner primary seal lip is made of a polytetrafluoroethylene material.
7. The combination polytetrafluoroethylene oil seal according to claim 1, wherein: the rubber sealing ring is made of hydrogenated nitrile rubber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010405144.0A CN111442088A (en) | 2020-05-14 | 2020-05-14 | Combined polytetrafluoroethylene oil seal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010405144.0A CN111442088A (en) | 2020-05-14 | 2020-05-14 | Combined polytetrafluoroethylene oil seal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111442088A true CN111442088A (en) | 2020-07-24 |
Family
ID=71652176
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010405144.0A Pending CN111442088A (en) | 2020-05-14 | 2020-05-14 | Combined polytetrafluoroethylene oil seal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111442088A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112303236A (en) * | 2020-11-05 | 2021-02-02 | 嘉科（无锡）密封技术有限公司 | Bidirectional rotary sealing high-rotating-speed oil seal |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2429692Y (en) * | 2000-05-19 | 2001-05-09 | 汪建 | Grease seal with assembled polyoxymethylene skeleton |
| CN2818933Y (en) * | 2005-08-24 | 2006-09-20 | 徐利阳 | Teflon labiate sealed ring of rotation axis |
| CN201875142U (en) * | 2010-12-14 | 2011-06-22 | 重庆智延科技发展有限公司 | Skeleton oil seal |
| JP3189259U (en) * | 2013-11-13 | 2014-03-06 | Nok株式会社 | Oil seal |
| CN210106597U (en) * | 2019-06-20 | 2020-02-21 | 昆山健博密封件科技有限公司 | Multi-lip combined framework oil seal |
| CN212251127U (en) * | 2020-05-14 | 2020-12-29 | 昆山健博密封件科技有限公司 | Combined polytetrafluoroethylene oil seal |
-
2020
- 2020-05-14 CN CN202010405144.0A patent/CN111442088A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2429692Y (en) * | 2000-05-19 | 2001-05-09 | 汪建 | Grease seal with assembled polyoxymethylene skeleton |
| CN2818933Y (en) * | 2005-08-24 | 2006-09-20 | 徐利阳 | Teflon labiate sealed ring of rotation axis |
| CN201875142U (en) * | 2010-12-14 | 2011-06-22 | 重庆智延科技发展有限公司 | Skeleton oil seal |
| JP3189259U (en) * | 2013-11-13 | 2014-03-06 | Nok株式会社 | Oil seal |
| CN210106597U (en) * | 2019-06-20 | 2020-02-21 | 昆山健博密封件科技有限公司 | Multi-lip combined framework oil seal |
| CN212251127U (en) * | 2020-05-14 | 2020-12-29 | 昆山健博密封件科技有限公司 | Combined polytetrafluoroethylene oil seal |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112303236A (en) * | 2020-11-05 | 2021-02-02 | 嘉科（无锡）密封技术有限公司 | Bidirectional rotary sealing high-rotating-speed oil seal |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103291765B (en) | roller bearing backing ring assembly | |
| KR100374882B1 (en) | Rotation shaft seal | |
| CN203717926U (en) | Sealing assembly | |
| US8127902B2 (en) | Annular sealing assembly for insertion between two mechanical members in relative motion, in particular a linear reciprocating motion, as a rod and the relative guiding seat of a mono-tube shock-absorber | |
| CN114635915B (en) | Sealing device | |
| CN206234363U (en) | Sealing device | |
| CN105626870A (en) | Rotary sealing structure with bidirectional sealing function | |
| CN109210199B (en) | Radial fluid seal | |
| CN212251127U (en) | Combined polytetrafluoroethylene oil seal | |
| CN111442088A (en) | Combined polytetrafluoroethylene oil seal | |
| US7753377B2 (en) | Shaft seal having shaft offset compensating capability | |
| US11629784B2 (en) | Sealing ring and use thereof | |
| KR20140137408A (en) | Radial shaft seal with static and hydrodynamic sealing features | |
| CN105042077A (en) | High-performance multi-purpose tooth-shaped Y-shaped combined seal device | |
| WO2004023007A1 (en) | Sealing device | |
| EP3653912A1 (en) | Rotary seal | |
| CN209925614U (en) | Labyrinth structured wheel hub bearing framework oil seal | |
| CN103438095A (en) | Full complement self-aligning roller bearing | |
| CN210106597U (en) | Multi-lip combined framework oil seal | |
| US11629785B2 (en) | Fiber reinforced seal lips for increased pressure resistance | |
| CN214248295U (en) | Combined PTFE skeleton oil blanket | |
| CN212455232U (en) | High-temperature-resistant grease-leakage-proof bearing | |
| JP2009097607A (en) | Oil seal | |
| CN216768343U (en) | Double-main-lip single-auxiliary-lip type composite oil seal for engineering machinery gearbox | |
| CN111895095A (en) | Seal assembly |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |