CN212203123U - Magnetic sealing device - Google Patents
Magnetic sealing device Download PDFInfo
- Publication number
- CN212203123U CN212203123U CN202020713811.7U CN202020713811U CN212203123U CN 212203123 U CN212203123 U CN 212203123U CN 202020713811 U CN202020713811 U CN 202020713811U CN 212203123 U CN212203123 U CN 212203123U
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- ring
- magnetic
- static
- sealing
- graphite
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Abstract
The utility model provides a magnetic force sealing device, include: a stationary ring 10 and a moving ring 20; the static ring 10 is sleeved between the through hole of the closed cavity and the rotating shaft; the rotating ring 20 is arranged in the closed cavity, and the rotating ring 20 is sleeved on the rotating shaft and rotates along with the rotating shaft; the graphite ring 21 of the moving ring 20 is arranged between the magnetic stationary ring 12 of the stationary ring 10 and the magnetic metal seat 22 of the moving ring 20, and no gap is formed between the graphite ring 21 and the magnetic stationary ring 12 under the magnetic force of the magnetic stationary ring 12 on the magnetic metal seat 22. The utility model provides a magnetic force sealing device simple structure, function are perfect, replace traditional spring force through magnetic attraction and guarantee the laminating of sealed face, have avoided the spring fatigue to lead to sealed inefficacy.
Description
Technical Field
The utility model relates to a sealed field especially relates to a magnetic sealing device.
Background
In the field of mechanical structures, there are cases where the rotating shaft penetrates into a closed cavity. The sealing between the rotating shaft and the sealed cavity affects the working condition of the sealed cavity.
In the prior art, a dynamic sealing device is generally adopted for sealing between a rotating shaft and a sealed cavity. The traditional dynamic sealing device mainly depends on the compression amount of a spring to ensure the sealing between a rotating shaft and a closed cavity. However, the spring is easily excited by the rotating shaft, or metal fatigue is easily generated, so that the spring loses elasticity, the compression amount of the spring cannot be ensured, and further, a sealing gap is enlarged to form leakage.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a magnetic force sealing device can alleviate the problem that current adoption spring seal exists.
The utility model provides a magnetic force sealing device, include: a stationary ring 10 and a moving ring 20; the static ring 10 comprises a static seal shell 11, a magnetic static ring 12 and a first seal ring 13; the movable ring 20 comprises a graphite ring 21, a magnetic metal seat 22 and a second sealing ring 23; wherein the content of the first and second substances,
the static ring 10 is sleeved between the through hole of the closed cavity and the rotating shaft, and the mounting edge of the static sealing shell 11 is fixed on the outer side of the closed cavity; the magnetic static ring 12 is sleeved and fixed on the inner side of the static sealing shell 11, a first sealing ring mounting groove is formed in the outer ring of the static sealing shell 11, and the first sealing ring 13 is arranged in the first sealing ring mounting groove;
the rotating ring 20 is arranged in the closed cavity, and the rotating ring 20 is sleeved on the rotating shaft and rotates along with the rotating shaft; the graphite ring 21 is arranged between the magnetic stationary ring 12 and the magnetic metal seat 22, and no gap is formed between the graphite ring 21 and the magnetic stationary ring 12 under the magnetic force action of the magnetic stationary ring 12 on the magnetic metal seat 22;
the inner ring of the end of the magnetic metal seat 22 far away from the graphite ring 21 is provided with a second sealing ring mounting groove, and a second sealing ring 23 is arranged in the second sealing ring mounting groove.
Optionally, one end of the magnetic metal seat 22 close to the graphite ring 21 is sleeved outside the graphite ring 21. Which may be used to prevent the graphite ring 21 from moving radially along the axis of rotation.
Alternatively, the magnetic metal seat 22 is not in contact with the stationary ring 10.
Optionally, the graphite ring 21 is not in contact with the static seal housing 11.
Optionally, the mounting edge of the static seal housing 11 is fixed to the outer side of the sealed cavity by a bolt.
Optionally, the smoothness and flatness of the contact surface between the graphite ring 21 and the magnetic stationary ring 12 meet the preset requirements.
Optionally, a limit ring is disposed at an end of the static seal housing 11 away from the mounting edge to prevent the magnetic static ring 12 from moving axially along the rotating shaft.
The utility model provides a magnetic sealing device compares with traditional spring-loaded mechanical seal, and the contact load between magnetic sealing's quiet ring and rotating ring fitting surface is less, has better maintainability and durability. In addition, the magnetic sealing device is not influenced by vibration, deflection and the like, and has better sealing effect.
Drawings
Fig. 1 is a schematic structural view of a magnetic sealing device provided by the present invention;
description of reference numerals:
10-stationary ring; 20-moving ring;
11-static seal housing; 21-a graphite ring;
12-a magnetic stationary ring; 22-a magnetic metal base;
13-a first sealing ring; 23-second sealing ring.
Detailed Description
Fig. 1 is a schematic structural view of the magnetic sealing device provided by the present invention. Referring to fig. 1, the present invention provides a magnetic sealing device, which comprises two parts.
The first part is a stationary ring 10, which includes a magnetic stationary ring 12 and a stationary seal housing 11. The stationary ring 10 is arranged in the closed cavity and sleeved on the rotating shaft. Wherein, the magnetic stationary ring 12 has smooth surface, good thermal stability, strong wear resistance and strong magnetic force; the static seal shell 11 is fixed on the shell of the closed cavity, and the magnetic static ring 12 is sleeved in the static seal shell 11 and is in interference fit with the static seal shell 11. The magnetic stationary ring 12 is clearance fitted to the rotating shaft.
The stationary ring 10 further comprises a first sealing ring 13, which is used for ensuring the sealing performance between the stationary ring 10 and the closed cavity and preventing leakage.
The second part is a moving ring 20, which comprises a graphite ring 21 and a magnetic metal seat 22, wherein the graphite ring 21 has excellent wear resistance and lubricity, and optionally, the moving ring is embedded in the magnetic metal seat 22 and sleeved on the rotating shaft.
The rotating ring 20 further comprises a second sealing ring 23, which is used for ensuring the sealing performance between the rotating ring 20 and the rotating shaft and preventing leakage.
The tightness between the stationary ring 10 and the moving ring 20 is achieved by means of the magnetic attraction of the magnetic stationary ring 12 to the magnetic metal seat 22.
The magnetic sealing device is simple in structure and complete in function, the traditional spring elasticity is replaced by the magnetic attraction force to ensure the attachment of the sealing surface, and the sealing failure caused by the fatigue of the spring is avoided.
Claims (7)
1. A magnetic seal apparatus, comprising: a stationary ring (10) and a moving ring (20); the static ring (10) comprises a static sealing shell (11), a magnetic static ring (12) and a first sealing ring (13); the moving ring (20) comprises a graphite ring (21), a magnetic metal seat (22) and a second sealing ring (23); wherein the content of the first and second substances,
the static ring (10) is sleeved between the through hole of the closed cavity and the rotating shaft, and the mounting edge of the static sealing shell (11) is fixed on the outer side of the closed cavity; the magnetic static ring (12) is sleeved and fixed on the inner side of the static sealing shell (11), a first sealing ring mounting groove is formed in the outer ring of the static sealing shell (11), and the first sealing ring (13) is arranged in the first sealing ring mounting groove;
the rotating ring (20) is arranged in the closed cavity, and the rotating ring (20) is sleeved on the rotating shaft and rotates along with the rotating shaft; the graphite ring (21) is arranged between the magnetic static ring (12) and the magnetic metal seat (22), and no gap exists between the graphite ring (21) and the magnetic static ring (12) under the magnetic action of the magnetic static ring (12) on the magnetic metal seat (22);
the inner ring of one end, far away from the graphite ring (21), of the magnetic metal seat (22) is provided with a second sealing ring installation groove, and the second sealing ring (23) is arranged in the second sealing ring installation groove.
2. The magnetic seal device according to claim 1, characterized in that the magnetic metal seat (22) is fitted around the graphite ring (21) near an end of the graphite ring (21).
3. The magnetic seal of claim 2, wherein the magnetic metal seat (22) is not in contact with the stationary ring (10).
4. A magnetic seal according to claim 3 characterised in that the graphite ring (21) is not in contact with the static seal housing (11).
5. The magnetic seal according to claim 4, characterized in that the mounting edge of the static seal housing (11) is bolted to the outside of the closed chamber.
6. The magnetic seal device according to claim 5, characterized in that the smoothness and flatness of the contact surface of the graphite ring (21) and the magnetic stationary ring (12) meet predetermined requirements.
7. The magnetic sealing device according to claim 6, characterized in that the end of the static sealing shell (11) far away from the mounting edge is provided with a stop collar to prevent the magnetic static ring (12) from moving axially along the rotating shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020713811.7U CN212203123U (en) | 2020-04-30 | 2020-04-30 | Magnetic sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020713811.7U CN212203123U (en) | 2020-04-30 | 2020-04-30 | Magnetic sealing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212203123U true CN212203123U (en) | 2020-12-22 |
Family
ID=73831482
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020713811.7U Active CN212203123U (en) | 2020-04-30 | 2020-04-30 | Magnetic sealing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212203123U (en) |
-
2020
- 2020-04-30 CN CN202020713811.7U patent/CN212203123U/en active Active
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Legal Events
| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant |