CN205663889U - Tandem type terminal surface formula magnetic fluid seal device - Google Patents
Tandem type terminal surface formula magnetic fluid seal device Download PDFInfo
- Publication number
- CN205663889U CN205663889U CN201620482851.9U CN201620482851U CN205663889U CN 205663889 U CN205663889 U CN 205663889U CN 201620482851 U CN201620482851 U CN 201620482851U CN 205663889 U CN205663889 U CN 205663889U
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- Prior art keywords
- ring
- pole shoe
- magnetism
- magnetic fluid
- axle
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Abstract
The utility model relates to a mechanical engineering field of sealing specifically indicates a tandem type terminal surface formula magnetic fluid seal device, including shell, left end terminal ring, right pole shoe ring, permanent magnet, left end terminal ring install on the outer wall of axle left end, the right pole shoe ring install after left end terminal ring spool the outer wall on, the axial of the right -hand member face edge axle of left side end terminal ring is equipped with the annular groove more than two, has the permanent magnet in the annular groove, and the polarity of the permanent magnet in the adjacent two rings connected in star is opposite, be provided with the utmost point tooth unanimous with annular groove quantity on the left end face of right pole shoe ring, the axial setting of axle is followed to utmost point tooth, corresponds the position of annular groove, be provided with the sealing medium between permanent magnet and the utmost point tooth. The utility model discloses simple structure, the leakage efficiency is high.
Description
Technical field
This utility model belongs to sealing field of mechanical engineering, is specifically related to a kind of tandem type end-surface type magnetic fluid seal
Device.
Background technology
Along with economical growing, sealing property is required more and more higher by the association area such as industrial equipment, and traditional is close
Envelope mode has been difficult to meet the seal request of some special occasions, and the development of magnetic fluid technique has promoted Magneticfluid Seal Technique
Development, Magneticfluid Seal Technique just plays an increasingly important role in field of sealing technology.Magnetic fluid seal is to use local
High-intensity magnetic field and a kind of advanced dynamic sealing method of magnetic fluid closure seal clearance, existing magnetic fluid seal typically uses suit
Structure, is mainly made up of parts such as pole shoe ring, permanent magnet, magnetic conductive axis or magnetic guiding loops, and its magnetism-collected structure sealing structure is main
By single-side pole teeth, to flute profile magnetic fluid movable sealing structure, Multi-level sealing structure, centrifugal magnetic fluid seal knot
Structure.Existing these seal structure, and its sealing ring is all to offer pole tooth in pole shoe ring or permanent magnet, makes between pole tooth and rotating shaft
Forming seal clearance, and rotating shaft can produce circular runout in rotation process, the bias of rotating shaft can change ring packing gap
Symmetry, if the offset of rotating shaft is excessive, it is also possible to generation rigid contact between rotating shaft and sealing pole tooth can be caused to cause just
Property abrasion, make ring packing gap radial dimension significantly increase, owing to magnetic fluid shaft seal pressure-bearing value is big to ring packing gap
Little the most sensitive, if ring packing gap increase 0.1mm can make magnetic fluid shaft seal pressure-bearing value reduce by more than 10%, therefore,
The a little increase in ring packing gap may result in being decreased obviously of magnetic fluid shaft seal pressure-bearing value, is unfavorable for that sealing device seals
The stability of performance.The most existing sealing device permanent magnet is longer to the magnetic circuit of seal clearance, causes magnetic in seal clearance
The magnetic field force that fluid is subject to is not strong, and when there is seal failure, magnetic fluid loss amount is big.
Summary of the invention
This utility model aims to solve the problem that in prior art, magnetic fluid seal voltage endurance capability is low, magnetic fluid during seal failure
The problem that leakage rate is big, it is provided that a kind of voltage endurance capability is high, the tandem type end-surface type magnetic fluid seal device that leakage efficiency is high.
The technical solution of the utility model is as follows:
A kind of tandem type end-surface type magnetic fluid seal device, including shell, left pole shoe ring, right pole shoe ring, permanent magnet；
Described left pole shoe ring is installed on the outer wall of the left front end of axle, after described right pole shoe ring is installed on left pole shoe ring
Axle outer wall on；
The right side of described left pole shoe ring is along the plural annular groove that is axially arranged with of axle, described annular groove
Inside there are permanent magnet, the opposite polarity of the described permanent magnet in adjacent two annular groove；The left end of described right pole shoe ring
The pole tooth consistent with annular groove quantity it is provided with on face, axially arranged along axle of described pole tooth, the position of corresponding annular groove
Put；It is provided with sealing medium between described permanent magnet and pole tooth.
Tandem type end-surface type magnetic fluid seal device described in the utility model also includes jump ring, magnetism-isolating loop, bearing, determines
Position ring, described jump ring is for axially positioning left pole shoe and right pole shoe；Bearing is installed on the right side of right pole shoe ring successively
Axle on, described bearing arranges two, arranges locating ring between two bearings.
Described magnetism-isolating loop includes that interior magnetism-isolating loop and outer magnetism-isolating loop, described interior magnetism-isolating loop are installed on axle, outer magnetism-isolating loop
Be installed on the inwall of shell, between outer wall and the inwall of outer magnetism-isolating loop of interior magnetism-isolating loop, leave gap, interior magnetism-isolating loop with outward every
The axial length of magnet ring is equal.
Described locating ring includes that inner position ring and outer positioning ring, described inner position ring are installed on axle, outer positioning ring
It is installed on the inwall of shell, between outer wall and the inwall of outer positioning ring of inner position ring, there is gap, inner position ring and outer fixed
The axial length of position ring is equal.
Described permanent magnet is axial charging type permanent magnet.
In described left pole shoe ring, the number of annular groove is 2-6, and the axial depth of annular groove is 0.7-30mm, footpath
It is 0.2-5mm to height.
The axial length of the described pole tooth in right pole shoe ring is 0.2-3mm, and radial height is 0.2-5mm.
The described distance between tooth left side, pole and permanent magnet right side is 0.1-3mm.
The installation process of tandem type end-surface type magnetic fluid seal device described in the utility model is as follows: by right pole shoe ring
It is obedient to left side with two jump rings by sequence from right to left to be mounted on an axle, permanent magnet is separately mounted to left pole shoe ring right side
In annular groove, rubber ring is arranged in the groove of left pole shoe ring left side, the left side of the pole tooth of right pole shoe ring is noted
Enter magnetic fluid, then will be mounted on an axle from left side with the left pole shoe ring of permanent magnet and sealing ring, make permanent magnet right side and
The left side of pole tooth coordinates；Interior magnetism-isolating loop and outer magnetism-isolating loop are arranged on the right side of right pole shoe ring from the right side of axle, every magnetic
The right side of ring is positioned at bearing, outer positioning ring and the inner position ring in left side successively by order from left to right, is positioned at right side
Bearing；Being mounted on an axle by shell, make shell cover the part on axle, the inwall on the left of shell compresses the left end of left pole shoe ring
Face, the compression of threadeding finally by end cap and shell is positioned at the outer ring of bearing on right side.
This utility model installs opposite polarity axial charging type permanent magnet in the groove of left pole shoe ring right side, and makes
Permanent magnet matches with the pole tooth in right pole shoe ring, forms in-line end face seal, at the seal clearance of permanent magnet Yu pole tooth
Middle injection magnetic fluid, the magnetic circuit of this sealing structure permanent magnet is short, and the magnetic field force that magnetic fluid is subject to is strong, substantially increases sealing
The voltage endurance capability of device, the loss amount of magnetic fluid when reducing seal failure；This utility model is on the right side of left pole shoe ring and has
The left side of pole shoe ring is respectively provided with jump ring, utilizes jump ring axially to position left pole shoe ring and right pole shoe ring, be prevented effectively from because of
Pole shoe ring moves axially and causes seal clearance to change, and causes sealing property to reduce or the situation of seal failure；This reality
With the radial seal structure of novel employing end-surface type, it is prevented effectively from the impact turning shaft run-out to seal clearance size, makes
The sealing property of magnet fluid sealing is more reliable；Sealing device described in the utility model, simple in construction, it is easy to dismounting.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of tandem type end-surface type magnetic fluid seal device described in the utility model
In figure, each sequence number indicates and the structure title of correspondence is as follows: 1-axle, 2-shell, 3-groove, the left pole shoe ring of 4-, 5-ring
Connected in star, 6-permanent magnet, 7-pole tooth, the right pole shoe ring of 8-, the outer magnetism-isolating loop of 9-, magnetism-isolating loop in 10-, 11-outer positioning ring, 12-is decided at the higher level but not officially announced
Position ring, 13-bearing, 14-end cap, 15-jump ring.
Detailed description of the invention
The utility model is described in further detail with embodiment below in conjunction with the accompanying drawings.
Embodiment 1
As it is shown in figure 1, a kind of tandem type end-surface type magnetic fluid seal device, including shell 2, left pole shoe ring 4, right pole shoe
Ring 8, permanent magnet 6；
Described left pole shoe ring 4 is installed on the outer wall of the left front end of axle 1, and described right pole shoe ring 8 is installed on left pole shoe ring 4
On the outer wall of axle 1 afterwards；
The right side of described left pole shoe ring 4 is along two annular grooves 5 that are axially arranged with of axle 1, in described annular groove 5
There are permanent magnet 6, the opposite polarity of the described permanent magnet 6 in adjacent two annular groove 5；A left side for described right pole shoe ring 8
Being provided with the pole tooth 7 consistent with annular groove 5 quantity on end face, axially arranged along axle 1 of described pole tooth 7, corresponding annular is recessed
The position of groove 5；Be provided with sealing medium between described permanent magnet 6 and pole tooth 7, described permanent magnet 6 be axial charging type forever
Magnet.
Tandem type end-surface type magnetic fluid seal device described in the utility model also includes jump ring 15, magnetism-isolating loop, bearing
13, locating ring, described jump ring 15 is for axially positioning left pole shoe 4 and right pole shoe 8；Described magnetism-isolating loop, bearing 13
On the axle 1 on the right side being installed on right pole shoe ring 8 successively, described bearing 13 arranges two, arranges location between two bearings 13
Ring.
Described magnetism-isolating loop includes that interior magnetism-isolating loop 10 and outer magnetism-isolating loop 9, described interior magnetism-isolating loop 10 are installed on axle, outward every
Magnet ring 9 is installed on the inwall of shell 2, leaves gap between outer wall and the inwall of outer magnetism-isolating loop 9 of interior magnetism-isolating loop 10, interior every magnetic
Ring 10 is equal with the axial length of outer magnetism-isolating loop 9.
Described locating ring includes that inner position ring 12 and outer positioning ring 11, described inner position ring 12 are installed on axle, outward
Locating ring 11 is installed on the inwall of shell 2, there is gap between outer wall and the inwall of outer positioning ring 11 of inner position ring 12, interior
The axial length of locating ring 12 and outer positioning ring 11 is equal.
In described left pole shoe ring 4, the number of annular groove 5 is 2, and the axial depth of annular groove 5 is 0.7mm, radially
It is highly 0.2mm.
The axial length of the described pole tooth 7 in right pole shoe ring 8 is 0.2mm, and radial height is 0.2mm.
Distance between described pole tooth 7 left side and permanent magnet 6 right side is 0.1mm.
The installation process of the tandem type end-surface type magnetic fluid seal device described in the present embodiment is as follows: by right pole shoe ring 8
It is obedient to left side with two jump rings 15 by sequence from right to left to be arranged on axle 1, permanent magnet 6 is separately mounted to left pole shoe ring 4 right
In the annular groove 5 of end face, rubber ring is arranged in the groove 3 of left pole shoe ring 4 left side, at the pole tooth 7 of right pole shoe ring 8
Inject magnetic fluid on left side, then by being arranged on axle 1 from left side with the left pole shoe ring 4 of permanent magnet 6 and sealing ring, make forever
The left side of magnet 6 right side and pole tooth 7 coordinates；Interior magnetism-isolating loop 10 and outer magnetism-isolating loop 9 are arranged on right pole shoe from the right side of axle 1
On the right side of ring 8, it is positioned at the bearing 13 in left side, outer positioning ring 11 on the right side of magnetism-isolating loop successively by order from left to right
With inner position ring 12, be positioned at right side bearing 13；Shell 2 is arranged on axle 1, makes shell 2 cover the part on axle 1, shell 2
The inwall in left side compresses the left side of left pole shoe ring 4, is positioned at right side finally by end cap 14 with the compression of threadeding of shell 2
The outer ring of bearing 13.
Embodiment 2
As it is shown in figure 1, a kind of tandem type end-surface type magnetic fluid seal device, including shell 2, left pole shoe ring 4, right pole shoe
Ring 8, permanent magnet 6；
Described left pole shoe ring 4 is installed on the outer wall of the left front end of axle 1, and described right pole shoe ring 8 is installed on left pole shoe ring 4
On the outer wall of axle 1 afterwards；
The right side of described left pole shoe ring 4 is along three annular grooves 5 that are axially arranged with of axle 1, in described annular groove 5
There are permanent magnet 6, the opposite polarity of the described permanent magnet 6 in adjacent two annular groove 5；A left side for described right pole shoe ring 8
Being provided with the pole tooth 7 consistent with annular groove 5 quantity on end face, axially arranged along axle 1 of described pole tooth 7, corresponding annular is recessed
The position of groove 5；Be provided with sealing medium between described permanent magnet 6 and pole tooth 7, described permanent magnet 6 be axial charging type forever
Magnet.
Tandem type end-surface type magnetic fluid seal device described in the utility model also includes jump ring 15, magnetism-isolating loop, bearing
13, locating ring, described jump ring 15 is for axially positioning left pole shoe 4 and right pole shoe 8；Described magnetism-isolating loop, bearing 13
On the axle 1 on the right side being installed on right pole shoe ring 8 successively, described bearing 13 arranges two, arranges location between two bearings 13
Ring.
Described magnetism-isolating loop includes that interior magnetism-isolating loop 10 and outer magnetism-isolating loop 9, described interior magnetism-isolating loop 10 are installed on axle, outward every
Magnet ring 9 is installed on the inwall of shell 2, leaves gap between outer wall and the inwall of outer magnetism-isolating loop 9 of interior magnetism-isolating loop 10, interior every magnetic
Ring 10 is equal with the axial length of outer magnetism-isolating loop 9.
Described locating ring includes that inner position ring 12 and outer positioning ring 11, described inner position ring 12 are installed on axle, outward
Locating ring 11 is installed on the inwall of shell 2, there is gap between outer wall and the inwall of outer positioning ring 11 of inner position ring 12, interior
The axial length of locating ring 12 and outer positioning ring 11 is equal.
In described left pole shoe ring 4, the number of annular groove 5 is 4, and the axial depth of annular groove 5 is 15mm, radially
It is highly 3mm.
The axial length of the described pole tooth 7 in right pole shoe ring 8 is 1.5mm, and radial height is 3mm.
Distance between described pole tooth 7 left side and permanent magnet 6 right side is 1.5mm.
The installation process of the tandem type end-surface type magnetic fluid seal device described in the present embodiment is with described in embodiment 1.
Embodiment 3
As it is shown in figure 1, a kind of tandem type end-surface type magnetic fluid seal device, including shell 2, left pole shoe ring 4, right pole shoe
Ring 8, permanent magnet 6；
Described left pole shoe ring 4 is installed on the outer wall of the left front end of axle 1, and described right pole shoe ring 8 is installed on left pole shoe ring 4
On the outer wall of axle 1 afterwards；
The right side of described left pole shoe ring 4 is along four annular grooves 5 that are axially arranged with of axle 1, in described annular groove 5
There are permanent magnet 6, the opposite polarity of the described permanent magnet 6 in adjacent two annular groove 5；A left side for described right pole shoe ring 8
Being provided with the pole tooth 7 consistent with annular groove 5 quantity on end face, axially arranged along axle 1 of described pole tooth 7, corresponding annular is recessed
The position of groove 5；Be provided with sealing medium between described permanent magnet 6 and pole tooth 7, described permanent magnet 6 be axial charging type forever
Magnet.
Tandem type end-surface type magnetic fluid seal device described in the utility model also includes jump ring 15, magnetism-isolating loop, bearing
13, locating ring, described jump ring 15 is for axially positioning left pole shoe 4 and right pole shoe 8；Described magnetism-isolating loop, bearing 13
On the axle 1 on the right side being installed on right pole shoe ring 8 successively, described bearing 13 arranges two, arranges location between two bearings 13
Ring.
Described magnetism-isolating loop includes that interior magnetism-isolating loop 10 and outer magnetism-isolating loop 9, described interior magnetism-isolating loop 10 are installed on axle, outward every
Magnet ring 9 is installed on the inwall of shell 2, leaves gap between outer wall and the inwall of outer magnetism-isolating loop 9 of interior magnetism-isolating loop 10, interior every magnetic
Ring 10 is equal with the axial length of outer magnetism-isolating loop 9.
Described locating ring includes that inner position ring 12 and outer positioning ring 11, described inner position ring 12 are installed on axle, outward
Locating ring 11 is installed on the inwall of shell 2, there is gap between outer wall and the inwall of outer positioning ring 11 of inner position ring 12, interior
The axial length of locating ring 12 and outer positioning ring 11 is equal.
In described left pole shoe ring 4, the number of annular groove 5 is 6, and the axial depth of annular groove 5 is 30mm, radially
It is highly 5mm.
The axial length of the described pole tooth 7 in right pole shoe ring 8 is 3mm, and radial height is 5mm.
Distance between described pole tooth 7 left side and permanent magnet 6 right side is 3mm.
The installation process of the tandem type end-surface type magnetic fluid seal device described in the present embodiment is with described in embodiment 1.
Claims (9)
1. a tandem type end-surface type magnetic fluid seal device, including shell (2), left pole shoe ring (4), right pole shoe ring (8), forever
Magnet (6)；It is characterized in that:
Described left pole shoe ring (4) is installed on the outer wall of axle (1) left front end, and described right pole shoe ring (8) is installed on left pole shoe
On the outer wall of the axle (1) after ring (4)；
The right side of described left pole shoe ring (4) is axially arranged with plural annular groove (5), described ring along axle (1)
Permanent magnet (6), the opposite polarity of the described permanent magnet (6) in adjacent two annular groove (5) is had in connected in star (5)；Institute
The pole tooth (7) consistent with annular groove (5) quantity, described pole tooth (7) edge it is provided with on the left side of the right pole shoe ring (8) stated
Axle (1) axially arranged, the position of corresponding annular groove (5)；It is provided with sealing between described permanent magnet (6) and pole tooth (7)
Medium.
2. tandem type end-surface type magnetic fluid seal device as claimed in claim 1, it is characterised in that: also include jump ring
(15), described jump ring (15) is for axially positioning left pole shoe ring (4) and right pole shoe ring (8).
3. tandem type end-surface type magnetic fluid seal device as claimed in claim 1, it is characterised in that: also include magnetism-isolating loop,
Bearing (13), locating ring, on the axle (1) on the right side that described magnetism-isolating loop, bearing (13) are installed on right pole shoe ring (8) successively, institute
The bearing (13) stated arranges two, arranges locating ring between two bearings (13).
4. tandem type end-surface type magnetic fluid seal device as claimed in claim 3, it is characterised in that: described magnetism-isolating loop bag
Including interior magnetism-isolating loop (10) and outer magnetism-isolating loop (9), described interior magnetism-isolating loop (10) is installed on axle, outside outer magnetism-isolating loop (9) is installed on
On the inwall of shell (2), between outer wall and the inwall of outer magnetism-isolating loop (9) of interior magnetism-isolating loop (10), leave gap, interior magnetism-isolating loop (10)
Equal with the axial length of outer magnetism-isolating loop (9).
5. tandem type end-surface type magnetic fluid seal device as claimed in claim 4, it is characterised in that: described locating ring bag
Including inner position ring (12) and outer positioning ring (11), described inner position ring (12) is installed on axle, and outer positioning ring (11) is installed on
On the inwall of shell (2), between outer wall and the inwall of outer positioning ring (11) of inner position ring (12), there is gap, inner position ring
And the axial length of outer positioning ring (11) is equal (12).
6. tandem type end-surface type magnetic fluid seal device as claimed in claim 1, it is characterised in that: described permanent magnet
(6) it is axial charging type permanent magnet.
7. tandem type end-surface type magnetic fluid seal device as claimed in claim 1, it is characterised in that: described left pole shoe ring
(4) number of upper annular groove (5) is 2-6, and the axial depth of annular groove (5) is 0.7-30mm, and radial height is 0.2-
5mm。
8. tandem type end-surface type magnetic fluid seal device as claimed in claim 6, it is characterised in that: described right pole shoe ring
(8) axial length of the pole tooth (7) on is 0.2-3mm, and radial height is 0.2-5mm.
9. tandem type end-surface type magnetic fluid seal device as claimed in claim 1, it is characterised in that: described pole tooth (7)
Distance between left side and permanent magnet (6) right side is 0.1-3mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620482851.9U CN205663889U (en) | 2016-05-25 | 2016-05-25 | Tandem type terminal surface formula magnetic fluid seal device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620482851.9U CN205663889U (en) | 2016-05-25 | 2016-05-25 | Tandem type terminal surface formula magnetic fluid seal device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205663889U true CN205663889U (en) | 2016-10-26 |
Family
ID=57160149
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620482851.9U Withdrawn - After Issue CN205663889U (en) | 2016-05-25 | 2016-05-25 | Tandem type terminal surface formula magnetic fluid seal device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205663889U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105822768A (en) * | 2016-05-25 | 2016-08-03 | 广西科技大学 | Series connection type end face type magnetic fluid sealing device |
-
2016
- 2016-05-25 CN CN201620482851.9U patent/CN205663889U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105822768A (en) * | 2016-05-25 | 2016-08-03 | 广西科技大学 | Series connection type end face type magnetic fluid sealing device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20161026 Effective date of abandoning: 20171205 |