CN106594290B - A kind of magnetic fluid seal device suitable for high linear speed rotation operating mode - Google Patents
A kind of magnetic fluid seal device suitable for high linear speed rotation operating mode Download PDFInfo
- Publication number
- CN106594290B CN106594290B CN201611129407.XA CN201611129407A CN106594290B CN 106594290 B CN106594290 B CN 106594290B CN 201611129407 A CN201611129407 A CN 201611129407A CN 106594290 B CN106594290 B CN 106594290B
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- China
- Prior art keywords
- pole shoe
- sealing ring
- sealing
- magnetism
- shaft
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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
-
- 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
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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
A kind of magnetic fluid seal device suitable for high linear speed rotation operating mode, belongs to sealing field of mechanical engineering, the sealing especially suitable for high linear speed rotation operating mode.Existing magnetic liquid centrifugal sealing structure can be solved when shaft start-up course centerline velocities are relatively low, voltage endurance capability deficiency, the problem of reliability is relatively low.The device is made of shaft (1), shell (2), left bearing (3), the first magnetism-isolating loop (4 1), the first pole shoe (5 1), the first sealing ring (6 1), first permanent magnet (7 1) etc..When the low linear velocity rotation of shaft (1), the present invention plays sealing function by axial magnetic fluid sealing component, in the case of axial space abundance, the axial magnetic fluid sealing number of teeth can be increased, improve voltage endurance capability, so as to improve the reliability of sealing, solve the problems, such as that existing magnetic liquid centrifugal sealing structure voltage endurance capability in shaft start-up course is insufficient.
Description
Technical field
The invention belongs to sealing field of mechanical engineering, rotates operating mode especially suitable for high linear speed.
Background technology
Magnetic fluid sealing with its zero leakage, without solid friction, without excellent specific properties such as mechanical friction, the small, long lifespans of energy consumption
Obtain in numerous high-tech areas such as aerospace, electronic technology, mechanical chemical industry, energy metallurgy and make extensively without alternative
With the application of the low linear velocity rotation occasion relative maturity in each field, to the rotating sealing direction of high linear speed
Development.Being become higher as the shaft diameter of axle becomes larger with rotating speed, the linear velocity of sealing position is higher, and the centrifugal force that magnetic liquid is received is bigger,
Existing magnetic liquid centrifugal sealing structure can be rotated the big centrifugal force of generation using high linear speed and be sealed, but work as linear velocity
Relatively low, the centrifugal force that magnetic liquid is received is small, seals by radially-arranged sealing tooth.Therefore, if radial space is limited
System, the sealing number of teeth amount of centrifugal seal is few, and when shaft start-up course centerline velocities are relatively low, magnetic fluid sealing voltage endurance capability is not
Foot.
The content of the invention
The technical problem to be solved in the invention is that existing magnetic liquid centrifugal sealing structure is restricted in radial space
In the case of, the sealing number of teeth of centrifugal seal is few, when shaft start-up course centerline velocities are relatively low, magnetic fluid sealing voltage endurance capability
Deficiency.It is therefore proposed that a kind of magnetic fluid seal device suitable for high linear speed rotation operating mode.
The technical solution adopted by the present invention to solve the technical problems is：
A kind of magnetic fluid seal device suitable for high linear speed rotation operating mode, forming the device includes：
Shaft, shell, left bearing, the first magnetism-isolating loop, the first pole shoe, the first sealing ring, the first permanent magnet, the second pole shoe,
Second sealing ring, the second permanent magnet, the (n-1)th pole shoe, the (n-1)th sealing ring, the (n-1)th permanent magnet, the n-th pole shoe, the n-th sealing ring,
Two magnetism-isolating loops, right bearing, the 3rd magnetism-isolating loop, left sealing ring, left pole shoe, permanent magnet, right sealing ring, right pole shoe, the 4th magnetism-isolating loop,
Turntable, end cap, the second magnetic liquid, screw, right clamp spring, the first magnetic liquid, left clamp spring；
Form the connection between each several part of the device：
The left bearing is installed on the right side of the shaft shaft shoulder, and the left clamp spring is installed in the left jump-ring slot of shaft,
Form runner assembly；First sealing ring is installed in the periphery groove of the first pole shoe, forms the first pole with sealing ring
Boots；Second sealing ring is installed in the periphery groove of the second pole shoe, forms the second pole shoe with sealing ring；And so on
It is installed on to (n-1)th sealing ring in the periphery groove of the (n-1)th pole shoe, forms the (n-1)th pole shoe with sealing ring；Described
N sealing rings are installed in the periphery groove of the n-th pole shoe, form the n-th pole shoe with sealing ring；The left sealing ring is installed on a left side
In the periphery groove of pole shoe, the left pole shoe with sealing ring is formed；The right sealing ring is installed on the periphery groove of right pole shoe
It is interior, form the right pole shoe with sealing ring；
The runner assembly, the first magnetism-isolating loop, the first pole shoe with sealing ring, the first permanent magnet, second with sealing ring
Pole shoe, the second permanent magnet, the (n-1)th pole shoe with sealing ring, the (n-1)th permanent magnet, the n-th pole shoe with sealing ring, the second magnetism-isolating loop
It is sequentially loaded into shell, first magnetic liquid is injected into the gap of pole shoe and shaft, and the right bearing is installed on second
The right side of magnetism-isolating loop, the right clamp spring are installed in the right jump-ring slot of shaft, complete to have been charged into the axial direction of the part in shell
Positioning, forms axial magnetic fluid sealing component；
3rd magnetism-isolating loop, left pole shoe, permanent magnet with sealing ring are sequentially loaded into shell, and the turntable passes through screw
It is fixed on the ladder end face of shaft, right pole shoe, the 4th magnetism-isolating loop with sealing ring are sequentially loaded into shell, and described second is magnetic
Liquid is injected into the gap that pole shoe is formed with turntable, and the end cap compresses the right side of the 4th magnetism-isolating loop, and end cap leads to shell
The connection that is screwed is crossed, completes the axially position of part in shell；
The right side of the left pole shoe and the left side of turntable form angle α, and 0≤α≤10 °；A left side for the right pole shoe
End face and the right side of turntable form angle β, and 0≤β≤10 °；Pole shoe is set to increase with the gap that turntable is formed with radius and subtract
It is small, the magnetic field intensity in gap is strengthened with the increase of radius, when turntable does not turn, the second magnetic liquid is still attracted to
The relatively large position of magnetic field intensity in gap；
When the low linear velocity rotation of shaft, sealing function is played by axial magnetic fluid sealing component, when the high line of shaft
When speed rotates, the first magnetic liquid is thrown off seal clearance by centrifugal force effect, axial magnetic fluid sealing failure, by turning
The huge centrifugal force that disk drives the rotation of the second magnetic liquid to produce plays sealing function；
Whole pole shoes, turntable are made of magnetic conductive material, such as 2Cr13；
Whole permanent magnets are made of high energy product permanent-magnet material, and magnetizing direction is axial charging；
Shaft can be made of permeability magnetic material, or be made of non-magnet material and put on the axle sleeve made of permeability magnetic material；
Whole magnetism-isolating loops, shell are made of non-permeable material, such as stainless steel and aluminium type material；
The present invention compares possessed beneficial effect with prior art：
(1) when the low linear velocity rotation of shaft, the present invention plays sealing function by axial magnetic fluid sealing component,
In the case of axial space abundance, the axial magnetic fluid sealing number of teeth can be increased, voltage endurance capability is improved, so as to improve the reliable of sealing
Property, solve the problems, such as that existing magnetic liquid centrifugal sealing structure voltage endurance capability in the case where low linear velocity rotates operating mode is insufficient；
(2) reduce since the gap that pole shoe and turntable are formed increases with radius, make the magnetic field intensity in gap with radius
Increase and strengthen, magnetic liquid can be more reliably attracted in the gap that pole shoe and turntable are formed；
(3) when the low linear velocity rotation of shaft, the present invention plays sealing function by axial magnetic fluid sealing component, institute
Can be reduced the radial dimension of turntable without sealing tooth, so as to reduce the radial dimension of sealing device, can fit on turntable
The occasion being limited for radial dimension.
Brief description of the drawings
Fig. 1 magnetic fluid seal device structure charts.
Fig. 2 A positions enlarged drawing.
In Fig. 1：Shaft 1, shell 2, left bearing 3, the first magnetism-isolating loop 4-1, the first pole shoe 5-1, the first sealing ring 6-1,
It is one permanent magnet 7-1, the second pole shoe 5-2, the second sealing ring 6-2, the second permanent magnet 7-2, the (n-1)th pole shoe 5- (n-1), (n-1)th close
Seal 6- (n-1), the (n-1)th permanent magnet 7- (n-1), the n-th pole shoe 5-n, the n-th sealing ring 6-n, the second magnetism-isolating loop 4-2, right bearing 8,
3rd magnetism-isolating loop 4-3, left sealing ring 9, left pole shoe 10, permanent magnet 11, right sealing ring 12, right pole shoe 13, the 4th magnetism-isolating loop 4-4,
Turntable 14, end cap 15, the second magnetic liquid 16, screw 17, right clamp spring 18, the first magnetic liquid 19, left clamp spring 20.
Embodiment
Using attached drawing as embodiment, the invention will be further described：
A kind of magnetic fluid seal device suitable for high linear speed rotation operating mode, such as Fig. 1, the sealing device include：Turn
Axis 1, shell 2, left bearing 3, the first magnetism-isolating loop 4-1, the first pole shoe 5-1, the first sealing ring 6-1, the first permanent magnet 7-1, second
Pole shoe 5-2, the second sealing ring 6-2, the second permanent magnet 7-2, the (n-1)th pole shoe 5- (n-1), the (n-1)th sealing ring 6- (n-1), (n-1)th
Permanent magnet 7- (n-1), the n-th pole shoe 5-n, the n-th sealing ring 6-n, the second magnetism-isolating loop 4-2, right bearing 8, the 3rd magnetism-isolating loop 4-3, a left side
Sealing ring 9, left pole shoe 10, permanent magnet 11, right sealing ring 12, right pole shoe 13, the 4th magnetism-isolating loop 4-4, turntable 14, end cap 15,
Two magnetic liquids 16, screw 17, right clamp spring 18, the first magnetic liquid 19, left clamp spring 20；
Form the connection between each several part of the device：
The left bearing 3 is installed on the right side of 1 shaft shoulder of shaft, and the left clamp spring 20 is installed on the left clamp spring of shaft 1
In groove, runner assembly is formed；The first sealing ring 6-1 forms band sealing in the periphery groove of the first pole shoe 5-1
First pole shoe of circle；The second sealing ring 6-2 is formed with sealing ring in the periphery groove of the second pole shoe 5-2
Second pole shoe；And so on to the (n-1)th sealing ring 6- (n-1) be installed on the (n-1)th pole shoe 5- (n-1) periphery groove
It is interior, form the (n-1)th pole shoe with sealing ring；The n-th sealing ring 6-n is in the periphery groove of the n-th pole shoe 5-n, shape
Into the n-th pole shoe with sealing ring；The left sealing ring 9 is installed in the periphery groove of left pole shoe 10, is formed with sealing ring
Left pole shoe；The right sealing ring 12 is installed in the periphery groove of right pole shoe 13, forms the right pole shoe with sealing ring；
The runner assembly, the first magnetism-isolating loop 4-1, the first pole shoe with sealing ring, the first permanent magnet 7-1, band sealing ring
The second pole shoe, the second permanent magnet 7-2, the (n-1)th pole shoe with sealing ring, the (n-1)th permanent magnet 7- (n-1), n-th with sealing ring
Pole shoe, the second magnetism-isolating loop 4-2 are sequentially loaded into shell, and first magnetic liquid 19 is injected into the gap of pole shoe and shaft 1,
The right bearing 8 is installed on the right side of the second magnetism-isolating loop 4-2, and the right clamp spring 18 is completed in the right jump-ring slot of shaft 1
The axially position of the part in shell 2 is had been charged into, forms axial magnetic fluid sealing component；
The 3rd magnetism-isolating loop 4-3, the left pole shoe with sealing ring, permanent magnet 11 are sequentially loaded into shell 2, the turntable 10
It is fixed on by screw 17 on the ladder end face of shaft 1, right pole shoe, the 4th magnetism-isolating loop 4-4 with sealing ring are sequentially loaded into shell 2
Interior, second magnetic liquid 16 is injected into the gap that pole shoe is formed with turntable 14, and the end cap 15 compresses the 4th magnetism-isolating loop
The right side of 4-4, end cap 15 are threadably secured with shell 2 and are connected, and complete the axially position of part in shell；
The right side of the left pole shoe 10 forms angle α, and 0≤α≤10 ° with the left side of turntable 14；The right pole shoe
13 left side forms angle β, and 0≤β≤10 ° with the right side of turntable 14；Make pole shoe with the gap that turntable 14 is formed with half
Footpath increases and reduces, and the magnetic field intensity in gap is strengthened with the increase of radius, when turntable 14 does not turn, the second magnetic liquid
16 are still attracted to the relatively large position of magnetic field intensity in gap；
When 1 low linear velocity of shaft rotates, sealing function is played by axial magnetic fluid sealing component, when shaft 1 is high
When linear velocity rotates, the first magnetic liquid 19 is thrown off seal clearance by centrifugal force effect, and axial magnetic fluid sealing fails, according to
The huge centrifugal force for driving the rotation of the second magnetic liquid 16 to produce by turntable 14 plays sealing function；
Whole pole shoes, turntable 14 are made of magnetic conductive material, such as 2Cr13；
Whole permanent magnets are made of high energy product permanent-magnet material, and magnetizing direction is axial charging；
Shaft 1 can be made of permeability magnetic material, or be made of non-magnet material and put on the axle sleeve made of permeability magnetic material；
Whole magnetism-isolating loops, shell 2 are made of non-permeable material, such as stainless steel and aluminium type material；
When 1 low linear velocity of shaft rotates, sealing device plays sealing function by axial magnetic fluid sealing component,
In the case of axial space abundance, the axial magnetic fluid sealing number of teeth can be increased, voltage endurance capability is improved, so as to improve the reliable of sealing
Property, solve the problems, such as that existing magnetic liquid centrifugal sealing structure voltage endurance capability in the case where low linear velocity rotates operating mode is insufficient；Due to
Pole shoe increases with the gap that turntable 14 is formed and reduces with radius, the magnetic field intensity in gap is strengthened with the increase of radius,
Magnetic liquid can be more reliably attracted in the gap that pole shoe is formed with turntable 14；When 1 low linear velocity of shaft rotates, this
Invention plays sealing function by axial magnetic fluid sealing component, so can be reduced and turn without sealing tooth on turntable 14
The radial dimension of disk 14, so as to reduce the radial dimension of sealing device, is applicable to the occasion that radial dimension is limited.
Claims (3)
1. a kind of magnetic fluid seal device suitable for high linear speed rotation operating mode, it is characterised in that the sealing device includes：
Shaft (1), shell (2), left bearing (3), the first magnetism-isolating loop (4-1), the first pole shoe (5-1), the first sealing ring (6-1), first
Permanent magnet (7-1), the second pole shoe (5-2), the second sealing ring (6-2), the second permanent magnet (7-2), the (n-1)th pole shoe (5- (n-1)),
(n-1)th sealing ring (6- (n-1)), the (n-1)th permanent magnet (7- (n-1)), the n-th pole shoe (5-n), the n-th sealing ring (6-n), second every
Magnet ring (4-2), right bearing (8), the 3rd magnetism-isolating loop (4-3), left sealing ring (9), left pole shoe (10), permanent magnet (11), right sealing
Enclose (12), right pole shoe (13), the 4th magnetism-isolating loop (4-4), turntable (14), end cap (15), the second magnetic liquid (16), screw
(17), right clamp spring (18), the first magnetic liquid (19), left clamp spring (20)；
Form the connection between each several part of the device：
The left bearing (3) is installed on the right side of shaft (1) shaft shoulder, and the left clamp spring (20) is installed on a left side for shaft (1)
In jump-ring slot, runner assembly is formed；First sealing ring (6-1) is installed in the periphery groove of the first pole shoe (5-1), shape
Into the first pole shoe with sealing ring；Second sealing ring (6-2) is installed in the periphery groove of the second pole shoe (5-2), shape
Into the second pole shoe with sealing ring；And so on be installed on the (n-1)th pole shoe (5- (n- to (n-1)th sealing ring (6- (n-1))
1) in periphery groove), the (n-1)th pole shoe with sealing ring is formed；N-th sealing ring (6-n) is installed on the n-th pole shoe (5-
N) in periphery groove, the n-th pole shoe with sealing ring is formed；The left sealing ring (9) is installed on the cylindrical of left pole shoe (10)
In the groove of face, the left pole shoe with sealing ring is formed；The right sealing ring (12) is installed in the periphery groove of right pole shoe (13),
Form the right pole shoe with sealing ring；
The runner assembly, the first magnetism-isolating loop (4-1), the first pole shoe with sealing ring, the first permanent magnet (7-1), band sealing ring
The second pole shoe, the second permanent magnet (7-2), the (n-1)th pole shoe with sealing ring, the (n-1)th permanent magnet (7- (n-1)), band sealing ring
The n-th pole shoe, the second magnetism-isolating loop (4-2) be sequentially loaded into shell, first magnetic liquid (19) is injected into pole shoe and shaft
(1) in gap, the right bearing (8) is installed on the right side of the second magnetism-isolating loop (4-2), and the right clamp spring (18), which is installed on, to be turned
In the right jump-ring slot of axis (1), complete to have been charged into the axially position of the part in shell (2), form axial magnetic fluid sealing group
Part；
3rd magnetism-isolating loop (4-3), the left pole shoe with sealing ring, permanent magnet (11) are sequentially loaded into shell (2), the turntable
(10) be fixed on by screw (17) on the ladder end face of shaft (1), the right pole shoe with sealing ring, the 4th magnetism-isolating loop (4-4) according to
In secondary loading shell (2), second magnetic liquid (16) is injected into the gap that pole shoe is formed with turntable (14), the end cap
(15) right side of the 4th magnetism-isolating loop (4-4) is compressed, end cap (15) is threadably secured with shell (2) and is connected, and completes zero in shell
The axially position of part.
2. a kind of magnetic fluid seal device suitable for high linear speed rotation operating mode according to claim 1, its feature
It is：
The right side of the left pole shoe (10) forms angle α, and 0≤α≤10 ° with the left side of turntable (14)；The right pole shoe
(13) left side and the right side of turntable (14) form angle β, and 0≤β≤10 °.
3. a kind of magnetic fluid seal device suitable for high linear speed rotation operating mode according to claim 1, its feature
It is：
Whole pole shoes, turntable (14) are made of magnetic conductive material；
Whole permanent magnets are made of high energy product permanent-magnet material, and magnetizing direction is axial charging；
Whole magnetism-isolating loops, shell (2) are made of non-permeable material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611129407.XA CN106594290B (en) | 2016-12-09 | 2016-12-09 | A kind of magnetic fluid seal device suitable for high linear speed rotation operating mode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611129407.XA CN106594290B (en) | 2016-12-09 | 2016-12-09 | A kind of magnetic fluid seal device suitable for high linear speed rotation operating mode |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106594290A CN106594290A (en) | 2017-04-26 |
| CN106594290B true CN106594290B (en) | 2018-05-08 |
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ID=58597978
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611129407.XA Expired - Fee Related CN106594290B (en) | 2016-12-09 | 2016-12-09 | A kind of magnetic fluid seal device suitable for high linear speed rotation operating mode |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106594290B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109854752B (en) * | 2019-01-29 | 2024-02-09 | 清华大学 | Magnetic liquid rotary sealing device suitable for high-rotation-speed working condition |
| CN109780219B (en) * | 2019-03-08 | 2020-09-29 | 石家庄学院 | Split type shell structure, magnetic liquid sealing device and shell sealing method |
| CN112728104B (en) * | 2020-12-31 | 2022-03-04 | 清华大学 | Magnetic liquid sealing device with pole teeth filled with porous material |
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2016
- 2016-12-09 CN CN201611129407.XA patent/CN106594290B/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN106594290A (en) | 2017-04-26 |
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