CN2473397Y - Magnetic fluid seal driving device for driving shaft - Google Patents
Magnetic fluid seal driving device for driving shaft Download PDFInfo
- Publication number
- CN2473397Y CN2473397Y CN 01235001 CN01235001U CN2473397Y CN 2473397 Y CN2473397 Y CN 2473397Y CN 01235001 CN01235001 CN 01235001 CN 01235001 U CN01235001 U CN 01235001U CN 2473397 Y CN2473397 Y CN 2473397Y
- Authority
- CN
- China
- Prior art keywords
- transmission shaft
- magnetic
- fluid sealing
- magnetic liquid
- magnetic fluid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model relates to a magnetic fluid sealing transmission device used for the transmission shaft, which consists of a transmission shaft, a supporting casing and a magnetic fluid. The utility model is characterized in that: the two sides of upper and lower of the magnetic fluid are respectively provided with a magnetic liquid warehouse around the transmission shaft, and the magnetic liquid warehouse is formed by a frame oil seal, a single level magnetic core component and a throat ring. The throat ring arranged near to the magnetic liquid sealing component is provided with a throat groove. The magnetic fluid sealing transmission device is in particular used for the using of the transmission shaft doing fro-and-to motion or synchronous rotating, which can effectively ensure the sealing performance.
Description
The utility model relates to a kind of transmission shaft magnet fluid sealing transmission device, belongs to the magnetic fluid sealing structure class of sealing component class.
Magnetic fluid sealing structure becomes the main separation structure of vacuum equipment transmission shaft sealing because its structural advantage replaces the contact-type rubber seal gradually.But being seen all kinds of transmission shaft magnetic fluid sealing structures all belong to the sealing of single location at present, promptly only are suitable for the rotary seal of transmission shaft; If a certain drive mechanism had both needed axially to rotatablely move, when needing again to do the radial displacement campaign simultaneously; This existing transmission shaft magnetic fluid sealed transmission structure can manifest certain defective again.Promptly in transmission shaft radial motion process, can make original attached magnetic liquid that is stored in the magnet fluid sealing assembly, expand up and down, thereby can cause the loss of magnetic liquid in the magnet fluid sealing assembly, finally cause magnet fluid sealing to lose efficacy along with the upper and lower displacement of transmission shaft.
The purpose of the present utility model: aim to provide no matter a kind of transmission shaft that is implemented in is radial motion, or make the magnet fluid sealing transmission device that the radial displacement campaign all has reliable sealing simultaneously.
This transmission shaft magnet fluid sealing transmission device, form by transmission shaft (1), support housing (2) and magnet fluid sealing assembly (3), it is characterized in that the portion of both sides up and down of described magnet fluid sealing assembly (3) respectively is provided with a magnetic liquid tank around transmission shaft (1) (4).
Described magnetic liquid tank (4) is made up of outside framework oil seal (10), single-stage magnetic core piece (9), restrictor ring (8); This restrictor ring (8) is pressed close to magnet fluid sealing assembly (3) and is located, and outside framework oil seal (10) is then adjacent with sliding bearing.
This axle magnet fluid sealing transmission device that can adapt to drive shaft reciprocates or realize simultaneously rotatablely moving according to above conceptual design, owing to designed this magnetic liquid tank device, so no matter be that transmission shaft is implemented independent radial motion, still rotation and displacement compound motion, magnetic liquid in its magnet fluid sealing assembly pole shoe can radially not surmount magnetic liquid tank interface up and down along transmission shaft, thereby can guarantee more effectively that the height of this magnetic fluid transmission seal is reliable.
Accompanying drawing is a structural representation of the present utility model.Among the figure: 1. transmission shaft 2. support housings 3. magnet fluid sealing assemblies 4. magnetic liquid tanks 5. sliding bearings 6. pole shoes 7. permanent magnets 8. restrictor rings 9. single-stage magnetic parts 10. outside framework oil seals.
Further describe the utility model below in conjunction with accompanying drawing, and provide embodiment.
This transmission shaft magnet fluid sealing transmission device as shown in the figure, it is that a kind of innovation with the magnet fluid sealing transmission device improves to existing transmission shaft.Consider the magnetic fluid sealing structure of existing apparatus,, but also must do radial motion up and down in case transmission shaft (1) is not only done the spinning campaign.When radial motion up and down, the magnetic liquid of being located in the magnet fluid sealing assembly (3) can be along with the upper and lower displacement of transmission shaft, because magnetic suction-operated and, upwards take the interval L of magnet fluid sealing downwards out of.And just because of the taking out of of this magnetic liquid, and the magnetic liquid of magnet fluid sealing section is reduced, finally cause whole device to lose sealing.
Therefore, the inventor proposes a kind of new technological scheme and is: promptly set up a magnetic liquid tank (4) of being made up of outside framework oil seal (10), single-stage magnetic (9) and restrictor ring (8) in addition at the position up and down of the magnet fluid sealing assembly of being made up of permanent magnet, pole shoe and magnetic liquid (3).Restrictor ring (8) in the wherein said magnetic liquid tank (4) should be close to magnet fluid sealing assembly (3) about.
Owing to take above-mentioned this technical pattern, in case transmission shaft (1) is in displacement working state up and down reciprocatingly, though the magnetic liquid of magnet fluid sealing section L also can be adsorbed on transmission shaft (1) and go up with the axis body upper and lower displacement, in case but this magnetic liquid is when migrating to the position of magnetic liquid tank (4), because restrictor ring (8) and single-stage magnetic (9,) acting in conjunction, these magnetic liquid promptly can be adsorbed in the scope of reservoir area.And so a kind of significant phenomenon can occur: transmission shaft (1) is attracted to down the magnetic liquid of magnetic liquid tank (4) and gets back to magnet fluid sealing assembly parts (3) section with axle when top offset, and the magnetic liquid on this section top takes magnetic liquid tank (4) on having partly at this moment certainly; In case and transmission shaft (1) is when bottom offset, the magnetic liquid in the last magnetic liquid tank (4) also can be brought to magnetic seal section L, and the magnetic liquid of former magnetic seal section also can take down magnetic liquid tank (4) to by transmission shaft (1).Therefore the sealing that this at first reciprocal result is the magnet fluid sealing section can not overflowed seal section with magnetic liquid, finally can very guarantee the permanent effectively sealing of transmission shaft effectively, and this is the present invention's goal of the invention that will reach just also.
Claims (2)
1, a kind of transmission shaft magnet fluid sealing transmission device, form by transmission shaft (1), support housing (2) and magnet fluid sealing assembly (3), it is characterized in that described magnet fluid sealing assembly (3) respectively is provided with a magnetic liquid tank around transmission shaft (1) (4) in the position, both sides up and down.
2, a kind of transmission shaft device for sealing magnetic fluid according to claim 1, it is characterized in that described magnetic liquid tank (4) is made up of outside framework oil seal (10), single-stage magnetic core piece (9), restrictor ring (8), described restrictor ring (8) is located at magnet fluid sealing assembly (3) and locates, and outside framework oil seal (10) is then adjacent with sliding bearing (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01235001 CN2473397Y (en) | 2001-04-30 | 2001-04-30 | Magnetic fluid seal driving device for driving shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01235001 CN2473397Y (en) | 2001-04-30 | 2001-04-30 | Magnetic fluid seal driving device for driving shaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2473397Y true CN2473397Y (en) | 2002-01-23 |
Family
ID=33648250
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01235001 Expired - Fee Related CN2473397Y (en) | 2001-04-30 | 2001-04-30 | Magnetic fluid seal driving device for driving shaft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2473397Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104165231A (en) * | 2014-08-04 | 2014-11-26 | 北京交通大学 | Water cooling magnetic liquid sealing device with shaft sleeve provided with rotary joint |
| CN108679232A (en) * | 2018-07-04 | 2018-10-19 | 清华大学 | Adapt to the magnetic fluid seal device of junction axially and radially displacement |
| WO2020006700A1 (en) * | 2018-07-04 | 2020-01-09 | 清华大学 | Magnetic liquid sealing device adapted to axial and radial displacement at joint |
-
2001
- 2001-04-30 CN CN 01235001 patent/CN2473397Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104165231A (en) * | 2014-08-04 | 2014-11-26 | 北京交通大学 | Water cooling magnetic liquid sealing device with shaft sleeve provided with rotary joint |
| CN108679232A (en) * | 2018-07-04 | 2018-10-19 | 清华大学 | Adapt to the magnetic fluid seal device of junction axially and radially displacement |
| WO2020006700A1 (en) * | 2018-07-04 | 2020-01-09 | 清华大学 | Magnetic liquid sealing device adapted to axial and radial displacement at joint |
| US11215286B2 (en) | 2018-07-04 | 2022-01-04 | Tsinghua University | Magnetic liquid sealing device adapted to axial and radial displacements of connection |
| CN108679232B (en) * | 2018-07-04 | 2023-11-21 | 清华大学 | Magnetic liquid sealing device adapting to axial and radial displacement of joint |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |