CN215334451U - Air pressure compensation oil seal - Google Patents
Air pressure compensation oil seal Download PDFInfo
- Publication number
- CN215334451U CN215334451U CN202121828041.1U CN202121828041U CN215334451U CN 215334451 U CN215334451 U CN 215334451U CN 202121828041 U CN202121828041 U CN 202121828041U CN 215334451 U CN215334451 U CN 215334451U
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- China
- Prior art keywords
- sealing ring
- air bag
- oil seal
- lower sealing
- ring
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Abstract
The utility model relates to the technical field of sealing devices, in particular to an oil seal; the utility model aims to solve the technical problem of providing an air pressure compensation oil seal with higher reliability. The air pressure compensation oil seal comprises an upper sealing ring, a lower sealing ring and an air bag, wherein the air bag is annular, the upper sealing ring, the lower sealing ring and the air bag are coaxially arranged, and the air bag is fixed between the upper sealing ring and the lower sealing ring.
Description
Technical Field
The utility model relates to the technical field of sealing devices, in particular to an oil seal.
Background
Oil seals are typically used to seal between a shaft extending from the housing and the housing.
The sealing effect is generally realized through rigid extrusion to current oil blanket, and the reliability is low, and after the oil blanket was worn and torn by the axle, radial dimension reduced, can cause the sealed inefficacy of oil blanket, can only solve through the mode of changing the oil blanket, and it is consuming time hard to change the oil blanket.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem of providing an air pressure compensation oil seal with higher reliability.
The technical scheme adopted by the utility model for solving the technical problems is as follows: the air pressure compensation oil seal comprises an upper sealing ring, a lower sealing ring and an air bag, wherein the air bag is annular, the upper sealing ring, the lower sealing ring and the air bag are coaxially arranged, and the air bag is fixed between the upper sealing ring and the lower sealing ring.
Furthermore, the air bag is communicated with a one-way valve.
Further, the inner ring surface of the lower sealing ring is a cambered surface.
Furthermore, a sealing groove is arranged on the outer ring surface of the upper sealing ring.
Further, the cross-sectional area of the lower sealing ring is larger than that of the upper sealing ring.
The utility model has the beneficial effects that: the air pressure compensation oil seal comprises an upper sealing ring, a lower sealing ring and an air bag, wherein the air bag is annular, the upper sealing ring, the lower sealing ring and the air bag are coaxially arranged, the air bag is fixed between the upper sealing ring and the lower sealing ring, the compression degree of the lower sealing ring to the shaft can be adjusted by inflating or deflating the annular air bag, the compression degree of the upper sealing ring to a machine body can also be adjusted, when the lower sealing ring is abraded due to friction with the shaft to reduce the size, the lower sealing ring compresses the shaft by inflating the air bag, the sealing performance of the oil seal is ensured, and the function of dynamically adjusting the sealing performance can be realized by inflating and deflating the air bag.
Drawings
FIG. 1 is a sectional view of the structure of the present invention mounted to a chassis;
FIG. 2 is a partial enlarged view of FIG. I;
FIG. 3 is a partial enlarged view II;
parts, positions and numbers in the drawings: upper seal ring 1, lower seal ring 2, gasbag 3, axle 4, cover 5, organism 6.
Detailed Description
The utility model will be further explained with reference to the drawings.
As shown in fig. 1 to 3, the air pressure compensation oil seal comprises an upper seal ring 1, a lower seal ring 2 and an air bag 3, the air bag 3 is annular, the upper seal ring 1, the lower seal ring 2 and the air bag 3 are coaxially arranged, an air bag fixing position is arranged between the upper seal ring 1 and the lower seal ring 2, the upper seal ring 1 is pressed on a machine body 6 by a cover 5, the upper seal ring 1 provides support for the air bag 3, the lower seal ring 2 is positioned in an inner ring of the upper seal ring 1, the air bag 3 is positioned between the upper seal ring 1 and the lower seal ring 2, the air bag 3 is inflated by means of an air pump, an air cylinder and the like, preferably, a one-way valve is communicated with the air bag 3, the air bag 3 is inflated or deflated by the one-way valve, after the lower seal ring 2 is worn by a shaft 4, the air bag 3 is inflated to expand the air bag 3, so that the air bag 3 presses the lower seal ring 2 against the shaft 4, the inflation quantity of the air bag 3 can be adjusted according to various working conditions of the shaft 4, so that the pressure exerted on the shaft 4 by the lower sealing ring 2 is different.
In order to facilitate the inflation and deflation of the air bag 3, a one-way valve is communicated with the air bag 3.
In order to ensure that the lubrication between the lower sealing ring 2 and the shaft 4 is good, the inner annular surface of the lower sealing ring 2 is an arc surface, a cavity can be formed between the arc surface and the shaft 4, the cavity stores lubricating oil, the contact area between the lower sealing ring 2 and the shaft 4 is reduced, the lubrication between the lower sealing ring 2 and the shaft 4 is kept, the lower sealing ring 2 is pressed by the air bag 3, and then the cavity deforms, but remains.
In order to keep a good seal between the upper seal ring 1 and the machine body 6, a seal groove is arranged on the outer ring surface of the upper seal ring 1.
In order to prolong the service life of the lower sealing ring 2 and further improve the reliability of the utility model, the cross section area of the lower sealing ring 2 is larger than that of the upper sealing ring 1, and the large cross section area represents that the material of the lower sealing ring 2 is more, the radial size is large, and the lower sealing ring is more wear-resistant and has long service life.
Claims (5)
1. Atmospheric pressure compensation oil blanket, its characterized in that: the air bag sealing device comprises an upper sealing ring (1), a lower sealing ring (2) and an air bag (3), wherein the air bag (3) is annular, the upper sealing ring (1), the lower sealing ring (2) and the air bag (3) are coaxially arranged, and the air bag is fixedly arranged between the upper sealing ring (1) and the lower sealing ring (2).
2. A gas pressure compensating oil seal as defined in claim 1, wherein: the air bag (3) is communicated with a one-way valve.
3. A gas pressure compensating oil seal as defined in claim 1, wherein: the inner ring surface of the lower sealing ring (2) is a cambered surface.
4. A gas pressure compensating oil seal as defined in claim 1, wherein: the outer ring surface of the upper sealing ring (1) is provided with a sealing groove.
5. A gas pressure compensating oil seal as defined in any one of claims 1 to 4, wherein: the cross sectional area of the lower sealing ring (2) is larger than that of the upper sealing ring (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121828041.1U CN215334451U (en) | 2021-08-06 | 2021-08-06 | Air pressure compensation oil seal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121828041.1U CN215334451U (en) | 2021-08-06 | 2021-08-06 | Air pressure compensation oil seal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215334451U true CN215334451U (en) | 2021-12-28 |
Family
ID=79576210
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121828041.1U Active CN215334451U (en) | 2021-08-06 | 2021-08-06 | Air pressure compensation oil seal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215334451U (en) |
-
2021
- 2021-08-06 CN CN202121828041.1U patent/CN215334451U/en active Active
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |