CN219013358U - Combined rotary air seal structure - Google Patents
Combined rotary air seal structure Download PDFInfo
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- CN219013358U CN219013358U CN202223259097.7U CN202223259097U CN219013358U CN 219013358 U CN219013358 U CN 219013358U CN 202223259097 U CN202223259097 U CN 202223259097U CN 219013358 U CN219013358 U CN 219013358U
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- elastic sealing
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- seal housing
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Abstract
The utility model relates to the technical field of sealing devices, in particular to a combined rotary air seal structure which can improve the sealing stability of a product and reduce the leakage risk.
Description
Technical Field
The utility model relates to the technical field of sealing devices, in particular to a combined rotary air seal structure.
Background
When the rotating shaft is installed, the tightness is required to be ensured, and the leakage of gas and the like in a container is prevented, and the prior proposal is that a plurality of sealing elements (usually tetrafluoro packing, oil seal, gas ring and the like) are arranged on the rotating shaft, the radial contact surface of the sealing element and the shaft is used as a sealing surface, and then compressed air is introduced into the sealing surface so as to realize the airtight seal; in this way, the rotation shaft is slightly eccentric or is subject to coaxial errors due to assembly errors, machining errors, etc., which are liable to cause wear and leakage of the sealing member.
Disclosure of Invention
In order to solve the problems of abrasion and leakage of a sealing element caused by errors at the existing rotating shaft, the utility model provides a combined rotating air seal structure which can improve the sealing stability of a product and reduce the leakage risk.
The technical scheme is as follows: the utility model provides a rotatory atmoseal structure of combination, its includes the rotation axis, its characterized in that, it still includes seal housing, the rotation axis runs through seal housing, be provided with elastic sealing circle and wear-resisting cover in the seal housing, elastic sealing circle suit in the rotation axis, wear-resisting cover pressure equipment in elastic sealing circle outer wall, wear-resisting cover with seal housing inner wall sliding connection, seal housing is last to have seted up the air inlet and inside is equipped with sealed air cavity, the compressed air source is connected to the air inlet.
The sealing device is further characterized in that a throat hoop is arranged in the middle of the outer wall of the elastic sealing ring;
the upper end and the lower end of the outer wall of the elastic sealing ring are respectively provided with a bump, and the inner ring of the wear-resistant sleeve is provided with a clamping groove matched with the bumps;
the sealing shell is provided with two air inlets, and the sealing air cavity is an annular cavity.
After the utility model is adopted, the radial contact surface of the outer wall of the rotating shaft, which is easy to leak, is reliably sealed through the elastic sealing ring, the sealing reliability is also ensured by the outer wall of the compression sealing ring of the wear-resistant sleeve, and then the connecting surface of the wear-resistant sleeve and the inner wall of the sealing shell is purged by compressed gas through the air inlet and the sealing air cavity to form positive pressure sealing, and the two sealing forms are combined for use, so that the sealing stability of the product is greatly improved, and the leakage risk is reduced; further, the hose clamp can enable the elastic sealing ring to be better attached to the outer wall of the rotating shaft, tightness is guaranteed, the protruding blocks of the outer wall of the sealing ring are matched with the clamping grooves on the inner ring of the wear-resistant sleeve, the wear-resistant sleeve and the elastic sealing ring can be prevented from sliding relatively, and leakage risks are avoided.
Drawings
FIG. 1 is a front elevational view of the structure of the present utility model;
FIG. 2 is a top view of the structure of the present utility model;
FIG. 3 is a schematic view of an elastic seal ring and wear sleeve prior to assembly.
Detailed Description
See fig. 1, fig. 2, fig. 3 shows a combined rotary air seal structure, it includes rotation axis 1 and seal housing 2, rotation axis 1 runs through seal housing 2, be provided with elastic seal circle 3 and wear-resisting cover 4 in the seal housing 2, elastic seal circle 3 suit is in rotation axis 1, upper and lower two wear-resisting cover 4 pressure equipment are in elastic seal circle 3 outer wall, wear-resisting cover 4 and seal housing 2 inner wall sliding connection, air inlet 5 and inside are equipped with sealed air cavity 6 on the seal housing 2, air inlet 5 connects compressed air source, air inlet 5 generally offers two, sealed air cavity 6 is the annular cavity, compressed air source provides compressed gas, get into sealed air cavity 6 through air inlet 5, then sweep to the junction surface of wear-resisting cover 4 and seal housing 2 inner wall, utilize the radial terminal surface of wear-resisting cover 2 as rotatory sealed face, and let in compressed air to sealed face and realize airtight.
The middle of the outer wall of the elastic sealing ring 3 is provided with the throat hoop 8, so that the elastic sealing ring can better hold the rotating shaft 1 tightly, and the possibility of leakage is reduced.
The upper end and the lower end of the outer wall of the elastic sealing ring 3 are respectively provided with a bump 9, the inner ring of the wear-resistant sleeve 4 is provided with a clamping groove 7 matched with the bump 9, and the elastic sealing ring 3, the wear-resistant sleeve 4 and the rotating shaft 1 are limited by the clamping groove 7 and the bump 9 to rotate together and cannot slide relatively.
The utility model uses the compression of the elastic sealing ring 3 to extrude the end surface of the wear-resistant sleeve 4 on the upper and lower inner walls of the sealing shell 2 to form a plane friction seal, and then uses compressed air to purge, thus realizing positive pressure seal, the whole structure can be installed and used in an integral form, the installation and disassembly efficiency is improved, the sealing ring has elasticity, the position and deformation of the rotating shaft 1 and the wear-resistant sleeve 4 can be passively adjusted, the eccentric rotation of the rotating shaft 1 is adapted, and the leakage risk is greatly reduced.
Claims (4)
1. The utility model provides a rotatory atmoseal structure of combination, its includes the rotation axis, its characterized in that, it still includes seal housing, the rotation axis runs through seal housing, be provided with elastic sealing circle and wear-resisting cover in the seal housing, elastic sealing circle suit in the rotation axis, wear-resisting cover pressure equipment in elastic sealing circle outer wall, wear-resisting cover with seal housing inner wall sliding connection, seal housing is last to have seted up the air inlet and inside is equipped with sealed air cavity, the compressed air source is connected to the air inlet.
2. The rotary combined gas seal structure according to claim 1, wherein a throat hoop is arranged in the middle of the outer wall of the elastic sealing ring.
3. The combined rotary air seal structure according to claim 1, wherein the upper end and the lower end of the outer wall of the elastic sealing ring are respectively provided with a bump, and the inner ring of the wear-resistant sleeve is provided with a clamping groove matched with the bump.
4. The combined rotary air seal structure according to claim 1, wherein the sealing shell is provided with two air inlets, and the sealing air cavity is an annular cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223259097.7U CN219013358U (en) | 2022-12-06 | 2022-12-06 | Combined rotary air seal structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223259097.7U CN219013358U (en) | 2022-12-06 | 2022-12-06 | Combined rotary air seal structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219013358U true CN219013358U (en) | 2023-05-12 |
Family
ID=86238357
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223259097.7U Active CN219013358U (en) | 2022-12-06 | 2022-12-06 | Combined rotary air seal structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219013358U (en) |
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2022
- 2022-12-06 CN CN202223259097.7U patent/CN219013358U/en active Active
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