CN220337469U - Rotary sealing mechanism - Google Patents
Rotary sealing mechanism Download PDFInfo
- Publication number
- CN220337469U CN220337469U CN202321896493.2U CN202321896493U CN220337469U CN 220337469 U CN220337469 U CN 220337469U CN 202321896493 U CN202321896493 U CN 202321896493U CN 220337469 U CN220337469 U CN 220337469U
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- Prior art keywords
- sealing
- rear cover
- ring
- front cover
- face
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- 238000007789 sealing Methods 0.000 title claims abstract description 180
- 230000007246 mechanism Effects 0.000 title claims abstract description 21
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 23
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 23
- 239000000463 material Substances 0.000 claims description 16
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims description 12
- 229920001971 elastomer Polymers 0.000 claims description 12
- 239000011737 fluorine Substances 0.000 claims description 12
- 229910052731 fluorine Inorganic materials 0.000 claims description 12
- 238000000576 coating method Methods 0.000 claims description 5
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 claims description 5
- 238000007664 blowing Methods 0.000 claims description 3
- 239000000843 powder Substances 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 4
- 238000010926 purge Methods 0.000 description 7
- 229920001973 fluoroelastomer Polymers 0.000 description 6
- 230000004888 barrier function Effects 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000002035 prolonged effect Effects 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000012856 packing Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000004809 Teflon Substances 0.000 description 2
- 229920006362 Teflon® Polymers 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 238000004381 surface treatment Methods 0.000 description 2
- 239000010456 wollastonite Substances 0.000 description 2
- 229910052882 wollastonite Inorganic materials 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 239000010405 anode material Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Landscapes
- Sealing Devices (AREA)
Abstract
The utility model discloses a rotary sealing mechanism, comprising: the sealing assembly is fixedly connected to the target main shaft and is provided with a first sealing end face and a second sealing end face which are arranged at intervals along the axial sealing assembly of the target main shaft; the sealing front cover and the sealing rear cover are respectively provided with two sides of the sealing assembly along the axial direction of the target spindle, the sealing assembly rotates relative to the sealing front cover and the sealing rear cover, the sealing front cover is abutted with the first sealing end face, and the sealing rear cover is abutted with the second sealing end face; the sealing ring is arranged between the sealing front cover and the sealing rear cover, is arranged at intervals with the sealing assembly along the radial direction of the target main shaft, and is provided with an air cavity among the sealing ring, the sealing front cover, the sealing rear cover and the sealing assembly; the air flow channel is arranged on the sealing ring and communicated with the air cavity, and the air flow channel is used for injecting compressed air into the air cavity. The utility model solves the technical problem that the sealing structure in the prior art cannot achieve a good sealing effect in the field of fine powder.
Description
Technical Field
The utility model relates to a rotary sealing mechanism, and belongs to the technical field of mixer equipment.
Background
The fine powder is a material with the particle size D50 smaller than millimeter and even reaching nanometer, and the material needs to be transported between devices in a state of fine powder in certain special fields, such as the transportation of lithium battery anode materials, and the sealing of the material in the transportation process is particularly important.
The sealing structure is mainly provided with a packing seal and a labyrinth seal, and the packing seal structure is used for tightly pressing the sealing element by using the pressing element at intervals in the using process, so that the sealing element is firmly fastened on the rotating shaft, thereby playing a sealing role.
However, it is difficult to achieve a long-term sealing effect with the above two sealing structures for the fine powder, because when particles of the fine powder are embedded between the sealing member and the rotating shaft, abrasion is generated between the sealing member and the rotating shaft, and as the fine powder continuously runs, abrasion is larger and larger, and the entering particles are more and more, so that abrasion is larger and larger. Once a material has been sealed with this packing, it has been disabled for only one week of operation and leakage has occurred.
In summary, how to design a sealing structure applied to fine powder production equipment is a technical problem to be solved at present.
Disclosure of Invention
The utility model aims to provide a rotary sealing mechanism, which solves the technical problem that a sealing structure in the prior art cannot achieve a good sealing effect in the field of fine powder.
In order to achieve the above purpose, the present utility model provides the following technical solutions:
a rotary seal mechanism comprising:
the sealing assembly is fixedly connected to the target main shaft and is provided with a first sealing end face and a second sealing end face which are arranged at intervals along the axial direction of the target main shaft;
the sealing front cover and the sealing rear cover are respectively arranged at two sides of the sealing assembly along the axial direction of the target spindle, the sealing assembly rotates relative to the sealing front cover and the sealing rear cover, the sealing front cover is abutted with the first sealing end face, and the sealing rear cover is abutted with the second sealing end face;
the sealing ring is arranged between the sealing front cover and the sealing rear cover, is arranged at intervals with the sealing assembly along the radial direction of the target main shaft, and is provided with an air cavity among the sealing ring, the sealing front cover, the sealing rear cover and the sealing assembly;
the air flow channel is arranged on the sealing ring and communicated with the air cavity, and the air flow channel is used for injecting compressed air into the air cavity.
As a preferred example, the sealing assembly includes: the fluorine rubber dynamic ring and the PTFE friction pair are fixedly connected to the target main shaft, the PTFE friction pair is arranged on two sides of the fluorine rubber dynamic ring along the axial direction of the target main shaft, and the PTFE friction pair is in sliding connection with the side wall of the sealing rear cover and the side wall of the sealing front cover.
As a preferable example, the contact surfaces of the PTFE friction pair, the sealing front cover and the sealing rear cover are respectively provided with a concave ring groove.
As a preferable example, the number of the ring grooves is plural.
As a preferred example, the PTFE friction pair has a connecting portion provided along the first seal end face or the second seal end face and a protruding portion perpendicular to the connecting portion.
As a preferable example, the protruding portion is provided at a distance from the fluorine rubber ring.
As a preferred example, the first sealing end surface and the second sealing end surface are both provided with a tungsten carbide coating.
As a preferred example, the sealed rear cover is provided with a purge air tap for removing material entering the sealed cavity.
As a preferred example, the plurality of purge air nozzles are provided, and the plurality of purge air nozzles are uniformly arranged along the circumferential direction of the sealed rear cover.
As a preferred example, one end of the sealing rear cover, which is far away from the sealing ring, is fixedly connected with a mounting flange.
The beneficial effects of the utility model are as follows:
1. according to the utility model, the air cavity is formed among the sealing front cover, the sealing rear cover, the sealing ring, the fluorine rubber moving ring and the PTFE friction pair, compressed air is injected into the air cavity mouth through the pressure-keeping air on the sealing ring, the pressure of the space in the air cavity can enable the surface of the connecting part of the PTFE friction pair to be outwards abutted against the surface of the sealing rear cover and the surface of the sealing front cover, and a tighter sealing beneficial effect is created.
2. Through the sealed back cover annular design is no less than 4 sweeps the air cock for clear away the material of piling up here, form first barrier, avoid the material to get into in the air cavity, improve rotary seal mechanism's life's beneficial effect.
Drawings
FIG. 1 is a schematic cross-sectional view of the present utility model;
fig. 2 is an enlarged schematic view of the structure of fig. 1 a according to the present utility model.
In the figure: the sealing device comprises a mounting flange 1, a sealing rear cover 2, a blowing nozzle 3, a PTFE friction pair 4, a connecting part 401, a protruding part 402, a ring groove 403, a fluorine rubber ring 5, a positive pressure protection nozzle 6, a sealing ring 7, a hoop 8, a sealing front cover 9, a target main shaft 10, an air cavity 11 and a tungsten carbide coating 12.
Detailed Description
The utility model will be further described with reference to the following detailed drawings, in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the utility model easy to understand.
In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
The following disclosure provides many different embodiments, or examples, for implementing different structures of embodiments of the utility model. In order to simplify the disclosure of embodiments of the present utility model, components and arrangements of specific examples are described below. They are, of course, merely examples and are not intended to limit the utility model. Furthermore, embodiments of the present utility model may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and do not in itself indicate a relationship between the various embodiments and/or arrangements discussed. In addition, embodiments of the present utility model provide examples of various specific processes and materials, but one of ordinary skill in the art will recognize the application of other processes and/or the use of other materials.
As shown in fig. 1-2, a rotary sealing mechanism comprises a mounting flange 1, a sealing rear cover 2, a purging air tap 3, a PTFE friction pair (moving ring) 4, a fluorine rubber moving ring 5, a positive pressure air tap 6, a sealing ring 7, an anchor ear 8, a sealing front cover 9 and the like; the fluororubber dynamic ring 5 is locked on the target main shaft 10 through the anchor ear 8, the PTFE friction pair (dynamic ring) 4 and the fluororubber dynamic ring 5 are matched to form a sealing assembly and rotate along with the target main shaft 10 to form main sealing, and meanwhile, the sealing assembly can float along with the target main shaft 10 and can accept shaft radial runout and error which are not more than 3 mm; the PTFE friction pair (moving ring) 4 is made of special mineral filled teflon, and wollastonite binding agent is contained to facilitate friction; the annular design of the sealing rear cover 2 is not less than 4 purging air nozzles 3, which are used for removing materials accumulated at the positions to form a first barrier, so that the materials are prevented from entering the air cavity 11, and the service life of the rotary sealing mechanism of the sealing element is prolonged; compressed air is blown into the air cavity through the positive pressure keeping air tap 6, micro positive pressure is formed in the air cavity 11 by the air, and meanwhile, the air flow can cool and reduce the temperature of the rotating sealing surface due to friction; the pressure in the space inside the air cavity 11 can enable the surface of the connecting part 401 of the PTFE friction pair to be tightly contacted with the surface of the sealing rear cover 2 and the sealing front cover 9, thereby creating a tighter seal. The friction surfaces of the sealing front cover 9 and the sealing rear cover 2 are sprayed with a tungsten carbide coating 12 and subjected to mirror surface treatment, so that metal foreign matters are effectively isolated, and the service life of the sealing assembly is prolonged.
The specific seal assembly includes fluorine rubber ring 5 and PTFE friction pair 4, fluorine rubber ring 5 passes through staple bolt 8 fixed connection be in on the target main shaft 10, PTFE friction pair 4 sets up fluorine rubber ring 5 is followed the axial both sides of target main shaft 10, just PTFE friction pair 4 has connecting portion 401 and bellying 402, connecting portion 401 indent are equipped with a plurality of annular 403, and the quantity of annular 403 is 4 preferentially, connecting portion 401 are along sealing protecgulum 9 and sealing postharvest 2's inside wall setting, wherein sealing protecgulum 9 with the face of connecting portion 401 butt is first sealed terminal surface, sealing postharvest 2 with the terminal surface of connecting portion 401 butt is the second sealed terminal surface, and connecting portion 401 all with sealing protecgulum 9, sealing postharvest 2 sliding connection, through the design of connecting portion 401 indent with the design of a plurality of annular 403, under the circumstances that does not influence the sealing, reduce connecting portion 401 with sealing protecgulum 9, sealing postharvest 2's inside wall friction, further improves sealing protecgulum 9 and sealing postharvest 2's inside wall, and seal 12 has the seal life-time of the surmounting that the seal is carried out on the side face of all is carried out on the seal, and the seal 2 is sealed with the seal 12. The protruding portion 402 is perpendicular to the connecting portion 401, and the protruding portion 402 and the fluororubber ring 5 are arranged at intervals, so that compressed air can conveniently abut the connecting portion 401 on the sealing rear cover 2 and the sealing front cover 9 respectively from a gap between the protruding portion 402 and the fluororubber ring 5. The sealing front cover 9 is abutted against the first sealing end face, and the sealing rear cover 2 is abutted against the second sealing end face. The sealing front cover 9 and the sealing rear cover 2 are respectively provided with two sides of the sealing assembly along the axial direction of the target spindle 10, and the sealing assembly rotates relative to the sealing front cover 9 and the sealing rear cover 2. A sealing ring 7, which is disposed between the sealing front cover 9 and the sealing rear cover 2, and is disposed at intervals from the sealing assembly along the radial direction of the target spindle 10, and an air cavity 11 is formed among the sealing ring 7, the sealing front cover 9, the sealing rear cover 2 and the sealing assembly; the pressure-keeping air tap 6 is arranged on the sealing ring 7 and communicated with the air cavity 11, and the pressure-keeping air tap 6 is used for injecting compressed air into the air cavity 11.
As a further embodiment, the sealing rear cover 2 is circumferentially designed with at least 4 purge air nozzles 3 for removing the material accumulated therein to form a first barrier to prevent the material from entering the air cavity 11. One end of the sealing back cover 2, which is far away from the sealing ring 7, is fixedly connected with a mounting flange 1, and the rotary sealing mechanism is mounted on equipment through the mounting flange 1.
Principle of: the fluororubber dynamic ring 5 is locked on the target main shaft 10 through the anchor ear 8, the PTFE friction pair (dynamic ring) 4 and the fluororubber dynamic ring 5 are matched to form a sealing assembly and rotate along with the target main shaft 10 to form main sealing, and meanwhile, the sealing assembly can float along with the target main shaft 10 and can accept shaft radial runout and error which are not more than 3 mm; the PTFE friction pair (moving ring) 4 is made of special mineral filled teflon, and wollastonite binding agent is contained to facilitate friction; the annular design of the sealing rear cover 2 is not less than 4 purging air nozzles 3, which are used for removing materials accumulated at the positions to form a first barrier, so that the materials are prevented from entering the air cavity 11, and the service life of the rotary sealing mechanism of the sealing element is prolonged; compressed air is blown into the air cavity through the positive pressure keeping air tap 6, micro positive pressure is formed in the air cavity 11 by the air, and meanwhile, the air flow can cool and reduce the temperature of the rotating sealing surface due to friction; the pressure in the space inside the air cavity 11 can enable the surface of the connecting part 401 of the PTFE friction pair to be tightly contacted with the surface of the sealing rear cover 2 and the sealing front cover 9, thereby creating a tighter seal. The friction surfaces of the sealing front cover 9 and the sealing rear cover 2 are sprayed with a tungsten carbide coating 12 and subjected to mirror surface treatment, so that metal foreign matters are effectively isolated, and the service life of the sealing assembly is prolonged.
The foregoing has shown and described the basic principles and main features of the present utility model and the advantages of the present utility model. It will be appreciated by persons skilled in the art that the present utility model is not limited to the embodiments described above, but is capable of numerous variations and modifications without departing from the spirit and scope of the utility model as hereinafter claimed. The scope of the utility model is defined by the appended claims and equivalents thereof.
Claims (10)
1. Rotary seal mechanism, its characterized in that includes:
the sealing assembly is fixedly connected to the target main shaft and is provided with a first sealing end face and a second sealing end face which are arranged at intervals along the axial direction of the target main shaft;
the sealing front cover and the sealing rear cover are respectively arranged at two sides of the sealing assembly along the axial direction of the target spindle, the sealing assembly rotates relative to the sealing front cover and the sealing rear cover, the sealing front cover is abutted with the first sealing end face, and the sealing rear cover is abutted with the second sealing end face;
the sealing ring is arranged between the sealing front cover and the sealing rear cover, is arranged at intervals with the sealing assembly along the radial direction of the target main shaft, and is provided with an air cavity among the sealing ring, the sealing front cover, the sealing rear cover and the sealing assembly;
the air flow channel is arranged on the sealing ring and communicated with the air cavity, and the air flow channel is used for injecting compressed air into the air cavity.
2. The rotary seal mechanism of claim 1, wherein the seal assembly comprises: the fluorine rubber dynamic ring and the PTFE friction pair are fixedly connected to the target main shaft, the PTFE friction pair is arranged on two sides of the fluorine rubber dynamic ring along the axial direction of the target main shaft, and the PTFE friction pair is in sliding connection with the side wall of the sealing rear cover and the side wall of the sealing front cover.
3. The rotary seal mechanism of claim 2, wherein:
and the contact surfaces of the PTFE friction pair and the sealing front cover and the sealing rear cover are respectively concavely provided with a ring groove.
4. The rotary seal mechanism of claim 3 wherein the number of ring grooves is a plurality.
5. The rotary seal mechanism of claim 4, wherein: the PTFE friction pair is provided with a connecting part and a protruding part, wherein the connecting part is arranged along the first sealing end surface or the second sealing end surface, and the protruding part is perpendicular to the connecting part.
6. The rotary seal mechanism of claim 5, wherein: the protruding part and the fluorine rubber ring are arranged at intervals.
7. The rotary seal mechanism of claim 6, wherein: the first sealing end face and the second sealing end face are both provided with tungsten carbide coatings.
8. The rotary seal mechanism according to any one of claims 1 to 7, wherein: the sealed back cover is provided with the air cock that sweeps, the air cock that sweeps is used for cleaing away the material that gets into sealed chamber.
9. The rotary seal mechanism of claim 8, wherein: the air blowing nozzles are arranged in a plurality, and the air blowing nozzles are uniformly arranged along the annular direction of the sealed rear cover.
10. The rotary seal mechanism of claim 9, wherein: and one end of the sealing rear cover, which is far away from the sealing ring, is fixedly connected with a mounting flange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321896493.2U CN220337469U (en) | 2023-07-19 | 2023-07-19 | Rotary sealing mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321896493.2U CN220337469U (en) | 2023-07-19 | 2023-07-19 | Rotary sealing mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220337469U true CN220337469U (en) | 2024-01-12 |
Family
ID=89456269
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321896493.2U Active CN220337469U (en) | 2023-07-19 | 2023-07-19 | Rotary sealing mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220337469U (en) |
-
2023
- 2023-07-19 CN CN202321896493.2U patent/CN220337469U/en active Active
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant |