CN209026206U - A kind of vacuum device for sealing magnetic fluid - Google Patents
A kind of vacuum device for sealing magnetic fluid Download PDFInfo
- Publication number
- CN209026206U CN209026206U CN201821727653.XU CN201821727653U CN209026206U CN 209026206 U CN209026206 U CN 209026206U CN 201821727653 U CN201821727653 U CN 201821727653U CN 209026206 U CN209026206 U CN 209026206U
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- shaft
- mounting base
- toroidal magnet
- circular groove
- tube body
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- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
Abstract
The utility model discloses a kind of vacuum device for sealing magnetic fluid, including mounting base, tube body, shaft, toroidal magnet, magnetic fluid and bearing, mounting base right side is equipped with circular groove, circular groove left side is equipped with the through-hole passed through for shaft activity, circular groove is coaxial with through-hole, toroidal magnet is set between circular groove and shaft, mounting base and shaft are permeability magnetic material, mounting base and shaft are used to form closed magnetic path, the N-S extreme direction of toroidal magnet is radially arranged, between toroidal magnet and circular groove internal circular surfaces, between toroidal magnet and shaft, gap is all had between through-hole and shaft, magnetic fluid is placed in each gap, it is docked with mounting base right end tube body left end, tube body is set in outside shaft and between the two by bearing rotary and connects；The utility model eliminates sealing ring, avoids high temperature to the adverse effect of sealing ring, to improve whole leakproofness reliability.
Description
Technical field
The utility model belongs to vacuum sealing technology field, is specifically related to a kind of vacuum device for sealing magnetic fluid.
Background technique
Magneticfluid Seal Technique is developed on the basis of magnetic fluid, when the gap in magnetic fluid injection magnetic field
When, it can be full of entire gap, be formed a kind of " O-ring seal of liquid ", and the function of device for sealing magnetic fluid is rotation
Movement is transmitted in sealing container, is usually used in vacuum sealing；In the prior art, as shown in Figure 1, magnetic fluid seal driving device one
As include shaft 1, shell 2, toroidal magnet 3, magnetic pole 4 and sealing ring 5, wherein one end of shaft 1 is located at vacuum environment, another
End is located at atmospheric environment, is used for transmission power；Completely cut off vacuum environment by shell 2；Toroidal magnet 3 generates magnetic field, toroidal magnet 3
The left and right sides is respectively arranged with a magnetic pole 4, and magnetic pole 4 uses permeability magnetic material, magnetic fluid 6 is provided between magnetic pole 4 and shaft 1,
It realizes the dynamic sealing isolation of vacuum environment and atmospheric environment, and realizes static seal using rubber seal 5；Meanwhile in shell 2
Both ends setting guarantees the bearing 7 that shaft 1 rotates；But the high temperature that ultrahigh vacuum equipment is both needed to carry out 400 DEG C or so for a long time dries
Roasting degasification, this high temperature are easy that rubber seal 5 is made to generate residual deformation, accelerate 5 aging of rubber seal, influence leakproofness
Energy.
Summary of the invention
In view of this, the purpose of this utility model is to provide a kind of vacuum device for sealing magnetic fluid, using by magnetic conduction material
The mounting base of material only need to eliminate sealing ring by magnet fluid sealing between mounting base and shaft, avoid high temperature to close
The adverse effect of seal.
In order to achieve the above object, a kind of vacuum device for sealing magnetic fluid of the utility model, including mounting base, tube body, turn
Axis, toroidal magnet, magnetic fluid and bearing, the mounting base right side are equipped with circular groove, and circular groove left side is equipped with and is used for
The through-hole that shaft activity passes through, circular groove is coaxial with through-hole, and toroidal magnet, mounting base are set between circular groove and shaft
It is permeability magnetic material with shaft, mounting base and shaft are used to form closed magnetic path, the N-S extreme direction of toroidal magnet radially cloth
It sets, between toroidal magnet and circular groove internal circular surfaces, between toroidal magnet and shaft, between being all had between through-hole and shaft
Gap is placed with magnetic fluid in each gap, and tube body left end is docked with mounting base right end, tube body be set in outside shaft and the two it
Between pass through bearing rotary connect.
It further, further include connector, connector left end is connect with mounting base, and connector right end is connect with tube body, described
Circular groove right end is equipped with ring-shaped step slot and the two is coaxial, and toroidal magnet is clamped in ring-shaped step slot left side and tube body left end
Between face.
Further, the bearing is one, and the inner ring and outer ring with relative rotation, inner ring fixing sleeve is loaded on outside shaft
Portion, outer ring fixing sleeve are loaded on tubular body.
Further, magnetic shield is additionally provided between the toroidal magnet and bearing, tube body and magnetic shield are non-magnetic material
Material.
The utility model has the beneficial effects that:
1. a kind of vacuum device for sealing magnetic fluid of the utility model eliminates sealing ring, high temperature is avoided to sealing ring not
Benefit influences, to improve whole leakproofness reliability；Since mounting base is permeability magnetic material, only needed between mounting base and shaft
Pass through magnet fluid sealing；In addition, the N-S extreme direction due to toroidal magnet is radially arranged, so that closed magnetic path edge turns
Axis is radially arranged, is conducive to shorten whole axial dimension, therefore, the utility model is particularly suitable for the narrow peace of axial dimension
Fill space.
2. a kind of vacuum device for sealing magnetic fluid of the utility model is conducive to further shorten whole axial dimension；Due to
Closed magnetic path radially arranges that whole axial dimension is reduced along shaft, on this basis, only installs a bearing, can also
To guarantee that shaft rotates；I.e. by reducing the number of bearing, further shorten whole axial dimension.
3. a kind of vacuum device for sealing magnetic fluid of the utility model avoids bearing from being magnetized, here, between magnet and bearing
It is disposed with magnetic shield, tube body and magnetic shield are non-magnet material, can be avoided bearing and are magnetized.
Detailed description of the invention
In order to keep the purpose of this utility model, technical scheme and beneficial effects clearer, the utility model provides as follows
Attached drawing is illustrated:
Fig. 1 is the front section view of magnetic fluid seal driving device in the prior art；
Fig. 2 is a kind of front section view of vacuum device for sealing magnetic fluid of the utility model；
Fig. 3 is the structural schematic diagram of mounting base described in a kind of vacuum device for sealing magnetic fluid of the utility model.
Appended drawing reference: 1- shaft；2- shell；3- toroidal magnet；4- magnetic pole；5- sealing ring；6- magnetic fluid；7- bearing；8-
Tube body；9- mounting base；10- connector；11- magnetic shield；91- circular groove；92- through-hole.
Specific embodiment
Below in conjunction with attached drawing, the preferred embodiment of the utility model is described in detail.
As shown in Figure 2 to Figure 3；A kind of vacuum device for sealing magnetic fluid of the utility model, including mounting base 9, tube body 8, turn
Axis 1, toroidal magnet 3, magnetic fluid 6 and bearing 7；9 right side of mounting base is equipped with circular groove 91, and 91 left side of circular groove is equipped with
For the through-hole 92 that 1 activity of shaft passes through, circular groove 91 and through-hole 92 are coaxial；It is set between circular groove 91 and shaft 1
Toroidal magnet 3, mounting base 9 and shaft 1 are permeability magnetic material, and mounting base 9 and shaft 1 are used to form closed magnetic path；Toroidal magnet 3
N-S extreme direction radially arrange so that closed magnetic path is conducive to shorten whole axial dimension along the radial arrangement of shaft 1；
Have between 91 internal circular surfaces of toroidal magnet 3 and circular groove, between toroidal magnet 3 and shaft 1, between through-hole 92 and shaft 1
There is gap, is placed with magnetic fluid 6 in each gap；8 left end of tube body is docked with 9 right end of mounting base, and tube body 8 is set in outside shaft 1
Portion and between the two by bearing 7 rotation connection.
Here, magnet material uses neodymium iron boron, and radiation is carried out to it and is magnetized, arranges that its N-S extreme direction radially；Make
Used time docks mounting base 9 with vacuum equipment, i.e. the setting of mounting base 9 is arranged in vacuum environment side, tube body 8 in atmospheric environment side；
In closed magnetic path, magnetic fluid 6 is strapped in gap by the magnetic line of force, and gas is avoided to penetrate into, to reach stable sealing effect.
For the ease of the installation of toroidal magnet 3, present embodiment further includes connector 10,10 left end of connector and mounting base
9 connections, 10 right end of connector are connect with tube body 8, and 91 right end of circular groove is equipped with ring-shaped step slot and the two is coaxial, annular
Magnet 3 is clamped between 8 left side of ring-shaped step slot left side and tube body.
Preferably, bearing 7 is one, and the inner ring and outer ring with relative rotation, inner ring fixing sleeve is loaded on outside shaft 1
Portion, outer ring fixing sleeve is loaded on inside tube body 8.
Since closed magnetic path is along the radial arrangement of shaft 1, the axial dimension of present embodiment entirety is reduced；It is basic herein
On, present embodiment only installs a bearing 7, by reducing the number of bearing 7, further shortens whole axial dimension, makes
It obtains present embodiment and is particularly suitable for the especially narrow installation space of axial dimension.
Preferably, magnetic shield 11 is additionally provided between toroidal magnet 3 and bearing 7, tube body 8 and magnetic shield 11 are non-magnetic
Material.Bearing 7 is protected, it is avoided to be magnetized.
Finally, it is stated that preferred embodiment above is merely intended for describing the technical solutions of the present application, but not for limiting the present application, to the greatest extent
Pipe has been described in detail the utility model by above preferred embodiment, but those skilled in the art should manage
Solution, can make various changes, without departing from the utility model claims book institute to it in the form and details
The range of restriction.
Claims (4)
1. a kind of vacuum device for sealing magnetic fluid, it is characterised in that: including mounting base, tube body, shaft, toroidal magnet, magnetic fluid
And bearing, the mounting base right side are equipped with circular groove, circular groove left side is equipped with the through-hole passed through for shaft activity,
Circular groove is coaxial with through-hole, and toroidal magnet is set between circular groove and shaft, and mounting base and shaft are permeability magnetic material,
Mounting base and shaft are used to form closed magnetic path, and the N-S extreme direction of toroidal magnet radially arranges that toroidal magnet is recessed with circle
Between slot internal circular surfaces, between toroidal magnet and shaft, gap is all had between through-hole and shaft, be placed with magnetic in each gap
Fluid, tube body left end are docked with mounting base right end, and tube body is set in outside shaft and between the two by bearing rotary and connects.
2. a kind of vacuum device for sealing magnetic fluid as described in claim 1, it is characterised in that: further include connector, connector
Left end is connect with mounting base, and connector right end is connect with tube body, and the circular groove right end is equipped with ring-shaped step slot and the two is same
Axis, toroidal magnet are clamped between ring-shaped step slot left side and tube body left side.
3. a kind of vacuum device for sealing magnetic fluid as described in claim 1, it is characterised in that: the bearing is one, tool
There is the inner ring and outer ring of relative rotation, for inner ring fixing sleeve loaded on outside shaft, outer ring fixing sleeve is loaded on tubular body.
4. a kind of vacuum device for sealing magnetic fluid as claimed in claim 3, it is characterised in that: the toroidal magnet and bearing it
Between be additionally provided with magnetic shield, tube body and magnetic shield are non-magnet material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821727653.XU CN209026206U (en) | 2018-10-24 | 2018-10-24 | A kind of vacuum device for sealing magnetic fluid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821727653.XU CN209026206U (en) | 2018-10-24 | 2018-10-24 | A kind of vacuum device for sealing magnetic fluid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209026206U true CN209026206U (en) | 2019-06-25 |
Family
ID=66908150
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821727653.XU Active CN209026206U (en) | 2018-10-24 | 2018-10-24 | A kind of vacuum device for sealing magnetic fluid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209026206U (en) |
-
2018
- 2018-10-24 CN CN201821727653.XU patent/CN209026206U/en active Active
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