CN212251127U - Combined polytetrafluoroethylene oil seal - Google Patents
Combined polytetrafluoroethylene oil seal Download PDFInfo
- Publication number
- CN212251127U CN212251127U CN202020794462.6U CN202020794462U CN212251127U CN 212251127 U CN212251127 U CN 212251127U CN 202020794462 U CN202020794462 U CN 202020794462U CN 212251127 U CN212251127 U CN 212251127U
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- metal framework
- sealing ring
- oil seal
- lip
- sealing lip
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Abstract
The utility model discloses a combined polytetrafluoroethylene oil seal, which 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, and the peripheral part of the inner ring 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, and the free end is arc-shaped and extends in the opposite direction to the auxiliary sealing lip; the two ends of the second metal framework are respectively attached to the first metal framework and the fixed end. The utility model provides a combined polytetrafluoroethylene oil blanket, non-deformable has excellent high low temperature resistance, low coefficient of friction, is applied to high rotational speed or needs to reduce the occasion of lip temperature.
Description
Technical Field
The utility model relates to a combined polytetrafluoroethylene oil blanket belongs to sealing member technical field.
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.
SUMMERY OF THE UTILITY MODEL
The purpose is as follows: in order to overcome the easy deformation problem of the polytetrafluoroethylene oil seal in the prior art, the utility model provides a combined polytetrafluoroethylene oil seal.
The technical scheme is as follows: in order to solve the technical problem, the utility model discloses a technical scheme does:
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, and 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: the utility model provides a combined polytetrafluoroethylene oil seal designs the oil return ditch on the polytetrafluoroethylene lip, has excellent chemical resistance, high low temperature resistance and low friction coefficient, is applied to the occasion that high rotational speed or needs reduce the lip temperature. 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 characteristic, can effectively block impurity, plays the effect of protecting inside main seal lip 4 to the life of extension oil blanket. The metal framework comprises a first metal framework 2 and a second metal framework 3, the cross sections of the first metal framework 2 and the second metal framework 3 are L-shaped structures, one end of the first metal framework 2 is attached to the inner side of the static sealing ring 11, and the other end of the first metal framework is embedded into the 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 a preferred embodiment of the present invention, and it should be noted that: for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be considered as the protection scope of the present 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, and 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 |
|---|---|---|---|
| CN202020794462.6U CN212251127U (en) | 2020-05-14 | 2020-05-14 | Combined polytetrafluoroethylene oil seal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020794462.6U CN212251127U (en) | 2020-05-14 | 2020-05-14 | Combined polytetrafluoroethylene oil seal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212251127U true CN212251127U (en) | 2020-12-29 |
Family
ID=74000202
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020794462.6U Active CN212251127U (en) | 2020-05-14 | 2020-05-14 | Combined polytetrafluoroethylene oil seal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212251127U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111442088A (en) * | 2020-05-14 | 2020-07-24 | 昆山健博密封件科技有限公司 | Combined polytetrafluoroethylene oil seal |
-
2020
- 2020-05-14 CN CN202020794462.6U patent/CN212251127U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111442088A (en) * | 2020-05-14 | 2020-07-24 | 昆山健博密封件科技有限公司 | Combined polytetrafluoroethylene oil seal |
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