CN107740866A - A kind of staged device for sealing magnetic fluid - Google Patents
A kind of staged device for sealing magnetic fluid Download PDFInfo
- Publication number
- CN107740866A CN107740866A CN201711069856.4A CN201711069856A CN107740866A CN 107740866 A CN107740866 A CN 107740866A CN 201711069856 A CN201711069856 A CN 201711069856A CN 107740866 A CN107740866 A CN 107740866A
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- Prior art keywords
- pole shoe
- periphery
- magnet ring
- magnetic fluid
- ring
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/40—Sealings between relatively-moving surfaces by means of fluid
- F16J15/43—Sealings between relatively-moving surfaces by means of fluid kept in sealing position by magnetic force
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
Abstract
The present invention is intended to provide a kind of staged device for sealing magnetic fluid, including multi-diameter shaft, shell, left pole shoe, right pole shoe, middle pole shoe, magnet ring, described multi-diameter shaft are set within shell；Described multi-diameter shaft includes multiple secondary axles, and the diameter of described multiple secondary axles prolongs axially to be sequentially reduced to the left；Described middle pole shoe sets more than one group；Described left pole shoe, middle pole shoe, right pole shoe are spaced on the inwall for being installed on shell successively according to order from left to right, described left pole shoe, middle pole shoe, right pole shoe correspond to the periphery of each secondary axle respectively, gap is left between secondary axle periphery, magnetic fluid is located in the gap；Described magnet ring is located between each pole shoe.The present invention can realize sealing under the special operation conditions such as high-speed overload.
Description
Technical field
The invention belongs to sealing field of mechanical engineering, and in particular to a kind of staged device for sealing magnetic fluid.
Background technology
When Magneticfluid Seal Technique is applied in major diameter, high speed and heavily loaded sealed environment, the magnetic fluid in seal clearance
Often failed because seal clearance is excessive, therefore the pressure-resistant performance for improving wide arc gap magnet fluid sealing is the focus of current research
One of problem.
One of the method for improving the pressure-resistant performance of magnet fluid sealing under wide arc gap be by improving magnetic fluid sealing structure, it is such as right
Than the sealing device and the (Publication No. of documents 2 described in document 1 (Publication No. CN201513565U patent)
CN202418592U patent) described in sealing device.Although two kinds of relatively common magnetic currents of sealing device described in document above
Body sealing property is greatly improved, but its sealing property does not reach the high sealing performance of the special operation conditions such as high-speed overload still
It is required that.
Magnet fluid sealing is to produce magnetic field force in seal clearance using permanent magnet magnetic fluid is secured firmly between sealing
In gap, the pressure difference of both sides is resisted, so as to reach the effect of sealing.
The content of the invention
, can not be real so as to solve existing sealing device it is an object of the invention to provide a kind of staged device for sealing magnetic fluid
The problem of the special operation condition high sealing performance requirement such as existing high-speed overload so that the Sealing Technology is successfully applied to the spies such as high-speed overload
Under different operating mode.
Technical scheme is as follows：
A kind of staged device for sealing magnetic fluid, including multi-diameter shaft, shell, left pole shoe, right pole shoe, middle pole shoe, magnet ring,
Described multi-diameter shaft is set within shell；
Described multi-diameter shaft includes multiple secondary axles, and the diameter of described multiple secondary axles prolongs axially to be sequentially reduced to the left；
Described middle pole shoe sets more than one group；Described left pole shoe, middle pole shoe, right pole shoe are according to order from left to right
Interval is installed on the inwall of shell successively, and described left pole shoe, middle pole shoe, right pole shoe correspond to the outer of each secondary axle respectively
Gap is left between disc, with secondary axle periphery, magnetic fluid is located in the gap；
Relative spacing ring is respectively equipped with the corresponding middle pole shoe of described left pole shoe, described left pole shoe is corresponding
Middle pole shoe between be provided with magnet ring, the periphery of the magnet ring at this and between left pole shoe, middle pole shoe
The inner headed face contact of spacing ring, two end faces of the magnet ring at this respectively with the right side of left pole shoe and a left side for middle pole shoe
End contact；
Relative spacing ring is respectively equipped between described middle pole shoe, magnet ring is provided between described middle pole shoe, should
The periphery of the magnet ring at place contacts with the inner headed face of the spacing ring between middle pole shoe, and two of the magnet ring at this
The individual end face end contact with the middle pole shoe of its both sides respectively；
Relative spacing ring is respectively equipped with the corresponding middle pole shoe of described right pole shoe, during described right pole shoe is corresponding
Between be provided with magnet ring between pole shoe, the periphery of the magnet ring at this and spacing between middle pole shoe and right pole shoe
The inner headed face contact of ring, two end faces of the magnet ring at this respectively with the left side of right pole shoe and the right side of middle pole shoe
Contact.
Preferably, the quantity of described secondary axle is 2-10.
Preferably, described secondary axle includes primary axis, two level axle and three-level axle, described primary axis, two level axle and three
Level axle prolongs axially to be set gradually from right to left, and the diameter of primary axis, two level axle and three-level axle is sequentially reduced；
The position of the periphery of primary axis is corresponded on the inwall of described shell a right pole shoe, right pole shoe and primary axis periphery it
Between leave gap, magnetic fluid is located in the gap, and right pole shoe left end face is provided with spacing ring；
The position that the periphery of three-level axle is corresponded on the inwall of described shell is provided with left pole shoe, and left pole shoe and three-level axle are cylindrical
Gap is left between face, magnetic fluid is located in the gap, and left pole shoe its right end face is provided with spacing ring；
The position that the periphery of two level axle is corresponded on the inwall of described shell is provided with middle pole shoe, the middle pole shoe and two level
Gap is left between axle periphery, magnetic fluid is located in the gap, and the middle pole shoe two side ends face is provided with spacing ring, and its right side limits
Position ring is corresponding with the spacing ring of right pole shoe, relative with the spacing ring of left pole shoe positioned at same radial height, its left side spacing ring
Should, positioned at same radial height；
Magnet ring is provided between described right pole shoe and middle pole shoe, the periphery of the magnet ring at this is with being located at dynode
The inner headed face of spacing ring between boots and right pole shoe contacts, two end faces of the magnet ring at this left end with right pole shoe respectively
Face and the contact of the right side of middle pole shoe；
It is provided with magnet ring between described left pole shoe, middle pole shoe, the periphery of the magnet ring at this and is located at dynode
The inner headed face of spacing ring between boots and left pole shoe contacts, two end faces of the magnet ring at this right-hand member with left pole shoe respectively
Face and the contact of the left side of middle pole shoe.
Preferably, on direction from left to right, the radial height of each magnet ring is incremented by successively.
Preferably, in addition to left magnetism-isolating loop and right magnetism-isolating loop；Described left magnetism-isolating loop is located at the left side of left pole shoe, is close to outer
The inwall of shell is set；Described right magnetism-isolating loop is located at the right side of right pole shoe, and the inwall for being close to shell is set.
Preferably, in addition to left bearing and right bearing, described left bearing are located at the left side of left magnetism-isolating loop, are set in ladder
On axle；Described right bearing is located at the right side of right magnetism-isolating loop, is set on multi-diameter shaft.
Preferably, groove, described groove are respectively equipped with the periphery of described left pole shoe, middle pole shoe, right pole shoe
Provided with sealing ring.
The present invention is stepped by ladder shaft design, and by the Design of Permanent Magnet between pole shoe and pole shoe, is realized
Staged magnet fluid sealing；Sealing device of the present invention, using more pole shoe independent designs, reduce the difficulty that assembling positions；It is preferred that
The structure of three-level secondary axle, the complexity of structure is reduced while sealing effectiveness is ensured；Permanent magnet is embedded in pole shoe simultaneously
Between in the limited block that is formed, the length of magnetic loop is reduced in gap while reducing taken up space above limited block again, increases
Magnetic field intensity in big seal clearance, greatly reduces the loss of the magnetic fluid in seal failure；Also, direction from left to right
On, the radial height of each magnet ring is incremented by successively so that the magnet fluid sealing formed in seal clearance is more reliable, realizes magnetic
The stability of source device, the voltage endurance capability of magnet fluid sealing under the conditions of wide arc gap is improved, expand its range of safety operation.
Brief description of the drawings
Fig. 1 is the structural representation of sealing device of the present invention；
Each sequence number sign and corresponding title are as follows in figure：
1- multi-diameter shafts 1,2- shells, the left pole shoes of 3-, the right pole shoes of 4-, pole shoe among 5-, 6- magnet rings, 7- spacing rings, a 8- left sides every
Magnet ring, the right magnetism-isolating loops of 9-, 10- left bearings, 11- right bearings, 12- grooves, 13- sealing rings；101- primary axis, 102- two level axles,
103- three-level axles.
Embodiment
The invention will be further described below in conjunction with the accompanying drawings.
As shown in figure 1, the staged device for sealing magnetic fluid that the present embodiment provides, including multi-diameter shaft 1, shell 2, left pole shoe
3rd, right pole shoe 4, middle pole shoe 5, magnet ring 6, described multi-diameter shaft 1 are set within shell 2；
Described multi-diameter shaft 1 includes multiple secondary axles, and the diameter of described multiple secondary axles prolongs axially to be sequentially reduced to the left；
Described middle pole shoe 5 sets more than one group；Described left pole shoe 3, middle pole shoe 5, right pole shoe 4 are according to from left to right
Interval is installed on the inwall of shell 2 order successively, and described left pole shoe 3, middle pole shoe 5, right pole shoe 4 correspond to each time respectively
The periphery of level axle, leaves gap, magnetic fluid is located in the gap between secondary axle periphery；
Be respectively equipped with relative spacing ring 7 on the corresponding middle pole shoe 5 of described left pole shoe 3, described left pole shoe 3 and its
Magnet ring 6 is provided between corresponding middle pole shoe 5, the periphery of the magnet ring 6 at this is with being located at left pole shoe 3, dynode
The inner headed face contact of spacing ring 7 between boots 5, two end faces of the magnet ring 6 at this respectively with the right side of left pole shoe 3 and
The left side contact of middle pole shoe 5；
Relative spacing ring 7 is respectively equipped between described middle pole shoe 5, magnet ring is provided between described middle pole shoe 5
6, the periphery of the magnet ring 6 at this contacts with the inner headed face of the spacing ring 7 between middle pole shoe 5, the permanent magnetism at this
Two end faces of body ring 6 end contact with the middle pole shoe 5 of its both sides respectively；
Relative spacing ring 7 is respectively equipped with the corresponding middle pole shoe 5 of described right pole shoe 4, described right pole shoe 4 is right with it
Magnet ring 6 should be provided between middle pole shoe 5, the periphery of the magnet ring 6 at this is with being located at middle pole shoe 5 and right pole shoe 4
Between spacing ring 7 inner headed face contact, two end faces of the magnet ring 6 at this respectively with the left side of right pole shoe 4 and in
Between pole shoe 5 right side contact；
Described secondary axle includes primary axis 101, two level axle 102 and three-level axle 103, described primary axis 101, two level axle 102
Prolong with three-level axle 103 and axially set gradually from right to left, the diameter of primary axis 101, two level axle 102 and three-level axle 103 subtracts successively
It is small；
There are right pole shoe 4, right pole shoe 4 and primary axis in the position for the periphery for corresponding to primary axis 101 on the inwall of described shell 2
Gap is left between 101 peripheries, magnetic fluid is located in the gap, and the right left end face of pole shoe 4 is provided with spacing ring 7；
The position for the periphery for corresponding to three-level axle 103 on the inwall of described shell 2 is provided with left pole shoe 3, left pole shoe 3 and three-level
Gap is left between the periphery of axle 103, magnetic fluid is located in the gap, and the left its right end face of pole shoe 3 is provided with spacing ring 7；
The position for the periphery for corresponding to two level axle 102 on the inwall of described shell 2 is provided with middle pole shoe 5, the middle pole shoe 5
Gap is left between the periphery of two level axle 102, magnetic fluid is located in the gap, and the middle both sides end face of pole shoe 5 is provided with spacing
Ring 7, its right side spacing ring 7 is corresponding with the spacing ring 7 of right pole shoe 4, positioned at same radial height, its left side spacing ring 7 and a left side
The spacing ring 7 of pole shoe 3 is corresponding, positioned at same radial height；
It is provided with magnet ring 6 between described right pole shoe 4 and middle pole shoe 5, the periphery of the magnet ring 6 at this and is located at
Between the inner headed face of spacing ring 7 between pole shoe 5 and right pole shoe 4 contact, two end faces of the magnet ring 6 at this respectively with right pole
The left side of boots 4 and the contact of the right side of middle pole shoe 5；
It is provided with magnet ring 6 between described left pole shoe 3, middle pole shoe 5, the periphery of the magnet ring 6 at this and is located at
Between the inner headed face of spacing ring 7 between pole shoe 5 and left pole shoe 3 contact, two end faces of the magnet ring 6 at this respectively with left pole
The right side of boots 3 and the contact of the left side of middle pole shoe 5；
On direction from left to right, the radial height of each magnet ring 6 is incremented by successively；
Also include left magnetism-isolating loop 8 and right magnetism-isolating loop 9；Described left magnetism-isolating loop 8 is located at the left side of left pole shoe 3, is close to the interior of shell 2
Wall is set；Described right magnetism-isolating loop 9 is located at the right side of right pole shoe 4, and the inwall for being close to shell 2 is set；
Also include left bearing 10 and right bearing 11, described left bearing 10 is located at the left side of left magnetism-isolating loop 8, is set in multi-diameter shaft 1
On；Described right bearing 11 is located at the right side of right magnetism-isolating loop 9, is set on multi-diameter shaft 1；
Described left pole shoe 3, middle pole shoe 5, right pole shoe 4 periphery on be respectively equipped with groove 12, described groove 12 is provided with
Sealing ring 13.
Claims (7)
1. a kind of staged device for sealing magnetic fluid, including multi-diameter shaft（1）, shell（2）, left pole shoe（3）, right pole shoe（4）, it is middle
Pole shoe（5）, magnet ring（6）, described multi-diameter shaft（1）It is set in shell（2）Within, it is characterised in that：
Described multi-diameter shaft（1）Including multiple secondary axles, the diameter of described multiple secondary axles prolongs axially to be sequentially reduced to the left；
Described middle pole shoe（5）Set more than one group；Described left pole shoe（3）, middle pole shoe（5）, right pole shoe（4）According to from
Left-to-right order is spaced successively is installed on shell（2）Inwall on, described left pole shoe（3）, middle pole shoe（5）, right pole shoe
（4）The periphery of each secondary axle is corresponded to respectively, gap is left between secondary axle periphery, and magnetic fluid is located in the gap；
Described left pole shoe（3）Corresponding middle pole shoe（5）On be respectively equipped with relative spacing ring（7）, described left pole
Boots（3）Corresponding middle pole shoe（5）Between be provided with magnet ring（6）, the magnet ring at this（6）Periphery with being located at
Left pole shoe（3）, middle pole shoe（5）Between spacing ring（7）Inner headed face contact, the magnet ring at this（6）Two end faces
Respectively with left pole shoe（3）Right side and middle pole shoe（5）Left side contact；
Described middle pole shoe（5）Between be respectively equipped with relative spacing ring（7）, described middle pole shoe（5）Between be provided with forever
Magnet ring（6）, the magnet ring at this（6）Periphery and be located at middle pole shoe（5）Between spacing ring（7）Inner headed face connect
Touch, the magnet ring at this（6）Two end faces middle pole shoe with its both sides respectively（5）End contact；
Described right pole shoe（4）Corresponding middle pole shoe（5）On be respectively equipped with relative spacing ring（7）, described right pole shoe
（4）Corresponding middle pole shoe（5）Between be provided with magnet ring（6）, the magnet ring at this（6）Periphery with positioned at centre
Pole shoe（5）With right pole shoe（4）Between spacing ring（7）Inner headed face contact, the magnet ring at this（6）Two end faces difference
With right pole shoe（4）Left side and middle pole shoe（5）Right side contact.
2. staged device for sealing magnetic fluid as claimed in claim 1, it is characterised in that：The quantity of described secondary axle is 2-
10.
3. staged device for sealing magnetic fluid as claimed in claim 1, it is characterised in that：
Described secondary axle includes primary axis（101）, two level axle（102）With three-level axle（103）, described primary axis（101）, two
Level axle（102）With three-level axle（103）Prolong and axially set gradually from right to left, primary axis（101）, two level axle（102）With three-level axle
（103）Diameter be sequentially reduced；
Described shell（2）Inwall on correspond to primary axis（101）The position of periphery have right pole shoe（4）, right pole shoe（4）With
Primary axis（101）Gap is left between periphery, magnetic fluid is located in the gap, right pole shoe（4）Left end face is provided with spacing ring
（7）；
Described shell（2）Inwall on correspond to three-level axle（103）The position of periphery be provided with left pole shoe（3）, left pole shoe
（3）With three-level axle（103）Gap is left between periphery, magnetic fluid is located in the gap, left pole shoe（3）Its right end face is provided with limit
Position ring（7）；
Described shell（2）Inwall on correspond to two level axle（102）The position of periphery be provided with middle pole shoe（5）, in this
Between pole shoe（5）With two level axle（102）Gap is left between periphery, magnetic fluid is located in the gap, the middle pole shoe（5）Both sides
End face is provided with spacing ring（7）, its right side spacing ring（7）With right pole shoe（4）Spacing ring（7）It is corresponding, it is high positioned at same radial direction
Degree, its left side spacing ring（7）With left pole shoe（3）Spacing ring（7）It is corresponding, positioned at same radial height；
Described right pole shoe（4）With middle pole shoe（5）Between be provided with magnet ring（6）, the magnet ring at this（6）Periphery
With positioned at middle pole shoe（5）With right pole shoe（4）Between spacing ring（7）Inner headed face contact, the magnet ring at this（6）Two
Individual end face respectively with right pole shoe（4）Left side and middle pole shoe（5）Right side contact；
Described left pole shoe（3）, middle pole shoe（5）Between be provided with magnet ring（6）, the magnet ring at this（6）Periphery
With positioned at middle pole shoe（5）With left pole shoe（3）Between spacing ring（7）Inner headed face contact, the magnet ring at this（6）Two
Individual end face respectively with left pole shoe（3）Right side and middle pole shoe（5）Left side contact.
4. staged device for sealing magnetic fluid as claimed in claim 3, it is characterised in that：On direction from left to right, respectively
Individual magnet ring（6）Radial height it is incremented by successively.
5. staged device for sealing magnetic fluid as claimed in claim 3, it is characterised in that：Also include left magnetism-isolating loop（8）And the right side
Magnetism-isolating loop（9）；Described left magnetism-isolating loop（8）Located at left pole shoe（3）Left side, be close to shell（2）Inwall set；The described right side
Magnetism-isolating loop（9）Located at right pole shoe（4）Right side, be close to shell（2）Inwall set.
6. staged device for sealing magnetic fluid as claimed in claim 5, it is characterised in that：Also include left bearing（10）And right axle
Hold（11）, described left bearing（10）Located at left magnetism-isolating loop（6）Left side, be set in multi-diameter shaft（1）On；Described right bearing
（11）Located at right magnetism-isolating loop（7）Right side, be set in multi-diameter shaft（1）On.
7. cross staged device for sealing magnetic fluid as claimed in claim 1, it is characterised in that：Described left pole shoe（3）、
Middle pole shoe（5）, right pole shoe（4）Periphery on be respectively equipped with groove（12）, described groove（12）Provided with sealing ring（13）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711069856.4A CN107740866B (en) | 2017-11-03 | 2017-11-03 | Stepped magnetic fluid sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711069856.4A CN107740866B (en) | 2017-11-03 | 2017-11-03 | Stepped magnetic fluid sealing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107740866A true CN107740866A (en) | 2018-02-27 |
| CN107740866B CN107740866B (en) | 2023-05-02 |
Family
ID=61233302
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711069856.4A Active CN107740866B (en) | 2017-11-03 | 2017-11-03 | Stepped magnetic fluid sealing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107740866B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108843793A (en) * | 2018-09-03 | 2018-11-20 | 广西科技大学 | A kind of concave-convex type device for sealing magnetic fluid |
| CN109027254A (en) * | 2018-09-13 | 2018-12-18 | 广西科技大学 | A kind of embedded tandem type multi-diameter shaft device for sealing magnetic fluid of magnetic source |
| CN113357372A (en) * | 2021-07-13 | 2021-09-07 | 北京交通大学 | Multi-magnetic-source stepped shaft type magnetic fluid sealing device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108843793A (en) * | 2018-09-03 | 2018-11-20 | 广西科技大学 | A kind of concave-convex type device for sealing magnetic fluid |
| CN109027254A (en) * | 2018-09-13 | 2018-12-18 | 广西科技大学 | A kind of embedded tandem type multi-diameter shaft device for sealing magnetic fluid of magnetic source |
| CN113357372A (en) * | 2021-07-13 | 2021-09-07 | 北京交通大学 | Multi-magnetic-source stepped shaft type magnetic fluid sealing device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107740866B (en) | 2023-05-02 |
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