CN216045448U - Magnetic fluid sealing transmission device - Google Patents
Magnetic fluid sealing transmission device Download PDFInfo
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- CN216045448U CN216045448U CN202122512717.2U CN202122512717U CN216045448U CN 216045448 U CN216045448 U CN 216045448U CN 202122512717 U CN202122512717 U CN 202122512717U CN 216045448 U CN216045448 U CN 216045448U
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- magnetic fluid
- pole wedge
- sealing ring
- sealing
- pole
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Abstract
The utility model relates to a magnetic fluid sealing transmission device, which comprises: the sealing assembly is arranged between the vacuum bearing and the atmospheric bearing and comprises a permanent magnet, a first pole wedge, a second pole wedge, a magnetic fluid and a sealing ring, wherein the first pole wedge and the second pole wedge are arranged on two sides of the permanent magnet, and the magnetic fluid is injected into a gap of a magnetic conduction loop formed by the permanent magnet, the first pole wedge, the second pole wedge and the main shaft; the permanent magnet can slide up and down at the slide rail, the distribution of magnetic force lines of the magnet is adjusted in real time, enough magnetic fluid is attracted to enter a gap between the pole wedge and the rotating shaft, and the sealing effect of the magnetic fluid is ensured.
Description
Technical Field
The utility model relates to the field of magnetic fluid seal of display technology, in particular to a magnetic fluid seal transmission device.
Background
In the liquid crystal display panel industry, most vacuum equipment generally adopts a magnetic fluid sealing structure. The existing magnetic fluid sealing structure comprises a non-magnetic shell, a magnetic fluid, a rotating shaft, a pole wedge, a permanent magnet, a vacuum/atmosphere bearing, an O-shaped sealing ring and other components;
the magnetic fluid sealing mechanism utilizes the response characteristic of magnetic fluid to a magnetic field, the magnetic fluid is injected into a gap of a magnetic conduction loop formed by a high-performance permanent magnet, a pole wedge and a shaft, a plurality of liquid O-shaped rings can be formed, when the magnetic fluid is subjected to pressure difference, the magnetic fluid can move under the action of the magnetic field, the magnetic field enables the magnetic fluid to generate magnetic force resisting the pressure difference, new dynamic balance is achieved, and the sealing effect is further achieved;
the prior structure has the following problems: 1. in order to ensure the sealing effect, an O-shaped sealing ring is arranged above the pole wedge, and because the O-shaped sealing ring and the rotating shaft are in dynamic sealing, relative motion can be generated in the rotating process of the rotating shaft, the friction force is large, the service life of the O-shaped sealing ring is directly reduced, and the service life and the reliability of the magnetic fluid are reduced; 2. the O-shaped sealing ring needs frequent maintenance, the maintenance cost is high, and the production efficiency of equipment is influenced; 3. the O-shaped sealing ring generates larger friction force and has higher requirement on the driving force, and the driving force of a rotating shaft needs to be improved; 4. the magnet is fixed, and if the magnetic field is weakened, the magnetic force line has reduced capacity of attracting the magnetic fluid, so that the sealing performance of the magnetic fluid is reduced.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects of the prior art, the utility model provides the magnetic fluid sealing transmission device with good sealing performance.
The utility model relates to a magnetic fluid sealing transmission device, which adopts the following technical scheme: it includes:
a housing formed of a non-magnetic material, both ends of which are located in a vacuum region and an atmospheric region, respectively;
the main shaft is rotatably arranged in the middle of the shell in a penetrating way, and two ends of the main shaft are positioned in the vacuum area and the atmospheric area;
the vacuum bearing is arranged in the shell, sleeved on the main shaft and close to one end of the vacuum area;
the atmospheric bearing is arranged in the shell, sleeved on the main shaft and close to one end of the atmospheric region;
the sealing assembly is arranged between the vacuum bearing and the atmospheric bearing and comprises a permanent magnet, a first pole wedge, a second pole wedge, a magnetic fluid and a sealing ring, wherein the first pole wedge and the second pole wedge are arranged on two sides of the permanent magnet, one ends of the first pole wedge and the second pole wedge, which are connected with the inner walls of the two sides of the shell, are provided with sealing cavities, at least one sealing ring is arranged in each sealing cavity, after the sealing rings are compressed and deformed by the axial force between the shell and the first pole wedge and the second pole wedge, static seals are formed among the sealing rings, the shell and the first pole wedge and the second pole wedge, and the magnetic fluid is injected into gaps of a magnetic conduction loop formed by the permanent magnet, the first pole wedge, the second pole wedge and the main shaft;
the permanent magnet is arranged in the sliding rail in a sliding mode.
Furthermore, two sealing rings are arranged in the sealing cavity.
Further, the sealing ring is a rubber sealing ring or a metal sealing ring.
Further, the sealing ring is an O-shaped sealing ring.
Further, the sealing ring is an X-shaped sealing ring, and the cross section of the X-shaped sealing ring is X-shaped.
Further, the magnetic fluid is injected only into the first pole wedge, the second pole wedge, and the spindle gap.
Compared with the prior art, the utility model has the following beneficial effects:
1. the sliding rails are added at the joints of the first pole wedge and the second pole wedge and the permanent magnet, the permanent magnet can slide up and down at the sliding rails, the magnetic line distribution of the magnet is adjusted in real time, enough magnetic fluid is attracted to enter a gap between the pole wedges and the rotating shaft, and the sealing effect of the magnetic fluid is ensured;
2. the X-shaped sealing ring is adopted, the contact surface of the sealing ring and the shell is increased, dynamic balance is always maintained when the rotating shaft rotates, the service life of the sealing ring can be prolonged, and the sealing performance of the magnetic fluid can be further improved.
Drawings
The accompanying drawings, which are described herein to provide a further understanding of the application, are included in the following description:
FIG. 1 is a schematic structural diagram according to a first embodiment of the present invention;
fig. 2 is an "X" shaped seal ring according to a second embodiment of the present invention.
Detailed Description
Referring to fig. 1, an embodiment of a magnetic fluid seal actuator includes:
a housing 1 formed of a non-magnetic material, both ends of which are located in a vacuum area A and an atmospheric area B, respectively;
the main shaft 2 is rotatably arranged in the middle of the shell 1 in a penetrating way, and two ends of the main shaft are positioned in the vacuum area A and the atmospheric area B;
the vacuum bearing 3a is arranged in the shell 1, sleeved on the main shaft 2 and close to one end of the vacuum area A;
the atmospheric bearing 3B is arranged in the shell 1, sleeved on the main shaft 2 and close to one end of the atmospheric region B;
the sealing assembly is arranged between the vacuum bearing 3a and the atmospheric bearing 3b and comprises a permanent magnet 6, a first pole wedge 4a, a second pole wedge 4b, a magnetic fluid 8 and an O-shaped sealing ring 7, wherein the first pole wedge 4a and the second pole wedge 4b are arranged on two sides of the permanent magnet 6, one ends of the first pole wedge 4a and the second pole wedge 4b, which are connected with the inner walls of two sides of the shell 1, are provided with sealing cavities, at least one O-shaped sealing ring 7 is arranged in each sealing cavity, after the O-shaped sealing rings 7 are compressed and deformed by the axial force among the shell 1, the first pole wedge 4a and the second pole wedge 4b, static sealing is formed among the shell 1, the first pole wedge 4a and the second pole wedge 4b, and the magnetic fluid 8 is injected into a gap of a magnetic conduction loop formed by the permanent magnet 6, the first pole wedge 4a, the second pole wedge 4b and the main shaft 2;
the first pole wedge 4a, the second pole wedge 4b and the permanent magnet 6 are connected to one side and are respectively provided with a slide rail 5, and the permanent magnet 6 is arranged in the slide rail 5 in a sliding manner.
In a further improvement of this embodiment, two O-rings 7 are provided in the sealing chamber.
In a further improvement of this embodiment, the "O" ring 7 is a rubber ring or a metal ring.
In a further development of this embodiment, the magnetic fluid 8 is injected only into the gap between the first pole wedge 4a, the second pole wedge 4b and the spindle 2.
The second embodiment is the same as the first embodiment except that the structure of the seal ring is different from that of the first embodiment.
Referring to fig. 2, in the second embodiment, the "O" type sealing ring is changed into an "X" type sealing ring, and the cross section of the "X" type sealing ring is "X".
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. A magnetic fluid seal actuator comprising:
a housing formed of a non-magnetic material, both ends of which are located in a vacuum region and an atmospheric region, respectively;
the main shaft is rotatably arranged in the middle of the shell in a penetrating way, and two ends of the main shaft are positioned in the vacuum area and the atmospheric area;
the vacuum bearing is arranged in the shell, sleeved on the main shaft and close to one end of the vacuum area;
the atmospheric bearing is arranged in the shell, sleeved on the main shaft and close to one end of the atmospheric region;
the sealing assembly is arranged between the vacuum bearing and the atmospheric bearing and comprises a permanent magnet, a first pole wedge, a second pole wedge, a magnetic fluid and a sealing ring, wherein the first pole wedge and the second pole wedge are arranged on two sides of the permanent magnet, one ends of the first pole wedge and the second pole wedge, which are connected with the inner walls of the two sides of the shell, are provided with sealing cavities, at least one sealing ring is arranged in each sealing cavity, after the sealing rings are compressed and deformed by the axial force between the shell and the first pole wedge and the second pole wedge, static seals are formed among the sealing rings, the shell and the first pole wedge and the second pole wedge, and the magnetic fluid is injected into gaps of a magnetic conduction loop formed by the permanent magnet, the first pole wedge, the second pole wedge and the main shaft;
the method is characterized in that: the permanent magnet is arranged in the sliding rail in a sliding mode.
2. A magnetic fluid seal actuator as claimed in claim 1 wherein: two sealing rings are arranged in the sealing cavity.
3. A magnetic fluid seal actuator as claimed in claim 1 wherein: the sealing ring is a rubber sealing ring or a metal sealing ring.
4. A magnetic fluid seal actuator as claimed in claim 1 wherein: the sealing ring is an O-shaped sealing ring.
5. A magnetic fluid seal actuator as claimed in claim 1 wherein: the sealing ring is an X-shaped sealing ring, and the section of the X-shaped sealing ring is X-shaped.
6. A magnetic fluid seal actuator as claimed in claim 1 wherein: the magnetic fluid is injected only into the first pole wedge, the second pole wedge, and the spindle gap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122512717.2U CN216045448U (en) | 2021-10-19 | 2021-10-19 | Magnetic fluid sealing transmission device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122512717.2U CN216045448U (en) | 2021-10-19 | 2021-10-19 | Magnetic fluid sealing transmission device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216045448U true CN216045448U (en) | 2022-03-15 |
Family
ID=80609765
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122512717.2U Active CN216045448U (en) | 2021-10-19 | 2021-10-19 | Magnetic fluid sealing transmission device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216045448U (en) |
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2021
- 2021-10-19 CN CN202122512717.2U patent/CN216045448U/en active Active
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