CN103925370A - Magnetic liquid sealing device using magnetic grease - Google Patents
Magnetic liquid sealing device using magnetic grease Download PDFInfo
- Publication number
- CN103925370A CN103925370A CN201410177514.4A CN201410177514A CN103925370A CN 103925370 A CN103925370 A CN 103925370A CN 201410177514 A CN201410177514 A CN 201410177514A CN 103925370 A CN103925370 A CN 103925370A
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- pole shoe
- magnetic
- utmost point
- seal ring
- point tooth
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- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
Abstract
The invention provides a magnetic liquid sealing device using magnetic grease and belongs to the field of mechanical engineering sealing. The magnetic liquid sealing device solves the problem of liquid leakage when an existing magnetic liquid sealing device is used for sealing liquid in a high-pressure and high-liner-speed environment. The magnetic liquid sealing device comprises a shell (1), a left pole shoe (2), a permanent magnet (3), a right pole shoe (4), an end cover (5), screws (6), a right sealing ring (7), a left sealing ring (8) and other parts. According to the magnetic liquid sealing device, magnetic liquid is injected into the space between pole teeth b and a rotary shaft, and the magnetic grease is injected into the space between pole teeth a and the rotary shaft; because the magnetic grease has the advantages of being large in viscosity and not prone to being mixed with sealed media, the problem of the liquid leakage when the liquid is sealed in the high-pressure and high-liner-speed environment.
Description
Technical field
The invention belongs to sealing field of mechanical engineering.
Background technique
Magnetic fluid sealing technology is because it has zero leakage, nothing wearing and tearing, and the life-span is long, and advantages of simple structure and simple is used by increasing industry gradually.Existing magnetic liquid rotating sealing device typical structure as publication number be as described in the patent application that is CN202091519U of CN102518811A and publication number, can only be at the environment lower seal liquid medium of low pressure, low linear velocity, under the environment of high pressure, high linear speed, the life-span is short, application area has larger narrow limitation, especially when aerospace field seals pH value liquid.
Summary of the invention
The technical issues that need to address of the present invention are, existing magnetic liquid rotating sealing device can only be at the environment lower seal liquid medium of low pressure, low linear velocity, under the environment of high pressure, high linear speed, the life-span is short, application area has larger narrow limitation, especially when aerospace field seals pH value liquid.Therefore a kind of magnetic fluid seal device that adds magnetic fat is provided.
The technical solution adopted for the present invention to solve the technical problems is:
Add the magnetic fluid seal device of magnetic fat, form this device and comprise:
Shell, left pole shoe, permanent magnet, right pole shoe, end cap, screw, right seal ring, left seal ring.
Form the connection between the each several part of this device:
Described left seal ring is arranged in the groove on left pole shoe cylindrical, forms the left pole shoe with seal ring, and right seal ring is arranged in the groove on right pole shoe cylindrical, forms the right pole shoe with seal ring;
Described permanent magnet is arranged on the right side of the left pole shoe with seal ring, the described right side that is arranged on permanent magnet with the right pole shoe of seal ring, between the left side of permanent magnet and the right side of left pole shoe, the right side of permanent magnet and the left side of right pole shoe by gluing connection, magnetic fat is injected at utmost point tooth a place at pole shoe, magnetic liquid is injected at utmost point tooth b place at pole shoe, forms black box;
Described black box is installed boss right side in the enclosure;
Described end cap is arranged on the right side of right pole shoe, end cap and shell is fixed with being threaded on shell right side by screw, makes the each part axial of enclosure location;
The width la of the utmost point tooth a of described left and right pole shoe is greater than the width lb of utmost point tooth b, and wherein lb can design according to general magnetic fluid seal device, la ≈ 1.5～20lb;
The monolateral gap ha of the utmost point tooth a of described left and right pole shoe and rotating shaft is greater than utmost point tooth b and the monolateral gap hb of rotating shaft, and wherein hb can design according to general magnetic fluid seal device, ha ≈ 1.5～20hb;
A described left side (right side) the total utmost point number of teeth of pole shoe is N, and the quantity of wide utmost point tooth a is N
1, the quantity of thin utmost point tooth b is N
2, wherein: N=N
1+ N
2, N1/N2=0.1～9.
The present invention compares had beneficial effect with prior art:
By inject magnetic liquid between utmost point tooth b place and rotating shaft, between utmost point tooth a place and rotating shaft, inject magnetic fat, utilize magnetic fat viscosity larger, be difficult for and the advantage of sealed medium blending, solved the problem of the lost of life existing at the environment lower seal liquid of high pressure, high linear speed.
Brief description of the drawings
Fig. 1 adds the magnetic fluid seal device structural drawing of magnetic fat.
In Fig. 1: shell 1, left pole shoe 2, permanent magnet 3, right pole shoe 4, end cap 5, screw 6, right seal ring 7, left seal ring 8.
Embodiment
Taking accompanying drawing as embodiment, the invention will be further described:
Add the magnetic fluid seal device of magnetic fat, as Fig. 1, sealing device comprises: shell 1, left pole shoe 2, permanent magnet 3, right pole shoe 4, end cap 5, screw 6, right seal ring 7, left seal ring 8.
Form the connection between the each several part of this device:
Described left seal ring 8 is arranged in the groove on left pole shoe 2 cylindricals, forms the left pole shoe with seal ring, and right seal ring 7 is arranged in the groove on right pole shoe 4 cylindricals, forms the right pole shoe with seal ring;
Described permanent magnet 3 is arranged on the right side of the left pole shoe with seal ring, the described right side that is arranged on permanent magnet 3 with the right pole shoe of seal ring, between the right side of the left side of permanent magnet 3 and left pole shoe 2, the right side of permanent magnet 3 and the left side of right pole shoe 4 by gluing connection, magnetic fat is injected at utmost point tooth a place at pole shoe, magnetic liquid is injected at utmost point tooth b place at pole shoe, forms black box;
Described black box is arranged on the boss right side in shell 1;
Described end cap 5 is arranged on the right side of right pole shoe 4, end cap 5 and shell 1 is fixed with being threaded on shell 1 right side by screw 6, makes the each part axial of enclosure location;
The width la of described left and right pole shoe utmost point tooth a is greater than the width lb of utmost point tooth b, and wherein lb can design according to general magnetic fluid seal device, la ≈ 1.5～20lb;
Described left and right pole shoe utmost point tooth a and the monolateral gap ha of rotating shaft are greater than utmost point tooth b and the monolateral gap hb of rotating shaft, and wherein hb can design according to general magnetic fluid seal device, ha ≈ 1.5～20hb;
A described left side (right side) the total utmost point number of teeth of pole shoe is N, and the quantity of wide utmost point tooth a is N
1, the quantity of thin utmost point tooth b is N
2, wherein: N=N
1+ N
2, N1/N2=0.1～9.
Shell 1 and end cap 5 are selected non-magnetic material, as stainless steel or aluminium product;
Left pole shoe 2 and right pole shoe 4 are selected the material that magnetic property is good, as electrical pure iron;
Permanent magnet 3 is selected rubidium iron boron;
The kind of magnetic liquid is according to the magnetic liquid of the different base fluids of the different choice of sealing medium.
Claims (1)
1. add the magnetic fluid seal device of magnetic fat, form this device and comprise:
Shell (1), left pole shoe (2), permanent magnet (3), right pole shoe (4), end cap (5), screw (6), right seal ring (7), left seal ring (8);
Form the connection between the each several part of this device:
Described left seal ring (8) is arranged in the groove on left pole shoe (2) cylindrical, the left pole shoe of formation with seal ring, right seal ring (7) is arranged in the groove on right pole shoe (4) cylindrical, forms the right pole shoe with seal ring;
Described permanent magnet (3) is arranged on the right side of the left pole shoe with seal ring, the described right side that is arranged on permanent magnet (3) with the right pole shoe of seal ring, between the right side of the left side of permanent magnet (3) and left pole shoe (2), the right side of permanent magnet (3) and the left side of right pole shoe (4) by gluing connection, magnetic fat is injected at utmost point tooth a place at pole shoe, magnetic liquid is injected at utmost point tooth b place at pole shoe, forms black box;
Described black box is arranged on the boss right side in shell (1);
Described end cap (5) is arranged on the right side of right pole shoe (4), by screw (6) and being threaded fixing to end cap (5) and shell (1) on shell (1) right side, make the each part axial of enclosure location;
It is characterized in that:
The width la of the utmost point tooth a of described left and right pole shoe is greater than the width lb of utmost point tooth b;
The monolateral gap ha of the utmost point tooth a of described left and right pole shoe and rotating shaft is greater than utmost point tooth b and the monolateral gap hb of rotating shaft;
Between utmost point tooth b and rotating shaft, inject magnetic liquid, between utmost point tooth a and rotating shaft, inject magnetic fat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410177514.4A CN103925370B (en) | 2014-04-29 | 2014-04-29 | Add the magnetic fluid seal device of magnetic fat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410177514.4A CN103925370B (en) | 2014-04-29 | 2014-04-29 | Add the magnetic fluid seal device of magnetic fat |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103925370A true CN103925370A (en) | 2014-07-16 |
| CN103925370B CN103925370B (en) | 2016-01-20 |
Family
ID=51143690
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410177514.4A Expired - Fee Related CN103925370B (en) | 2014-04-29 | 2014-04-29 | Add the magnetic fluid seal device of magnetic fat |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103925370B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108869752A (en) * | 2018-08-13 | 2018-11-23 | 广西科技大学 | A kind of change tooth change gap hybrid magnetic fluid seal structure for hydraulic cylinder |
| CN110939739A (en) * | 2019-12-16 | 2020-03-31 | 清华大学 | Magnetic powder and magnetic liquid combined sealing device |
| CN112387225A (en) * | 2020-10-30 | 2021-02-23 | 清华大学 | Composite magnetic medium sealing device for reaction kettle |
| CN113639047A (en) * | 2020-12-28 | 2021-11-12 | 清华大学 | Magnetic liquid sealing device |
| CN113833858A (en) * | 2021-11-02 | 2021-12-24 | 北京交通大学 | Magnetic powder sealing liquid device with fluid dynamic pressure reverse conveying function |
| CN113839510A (en) * | 2021-09-26 | 2021-12-24 | 佛山德玛特智能装备科技有限公司 | Sealing structure and motor |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55152962A (en) * | 1979-05-14 | 1980-11-28 | Fuji Electric Co Ltd | Magnetic fluid seal device |
| CN2603249Y (en) * | 2002-03-23 | 2004-02-11 | 李名民 | Magnetic fluid sealing structure for transmission shaft |
| CN2620799Y (en) * | 2003-06-25 | 2004-06-16 | 成都环想科技发展有限责任公司 | Magnetic liquid sealing device with magnetic liquid tank for sealing oil |
| CN102537366A (en) * | 2012-01-05 | 2012-07-04 | 北京交通大学 | Sealing method for split type magnetic liquid sealing device |
| CN203098804U (en) * | 2013-02-05 | 2013-07-31 | 易杨直 | Electric locomotive gear box magnetic fluid sealing device |
-
2014
- 2014-04-29 CN CN201410177514.4A patent/CN103925370B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55152962A (en) * | 1979-05-14 | 1980-11-28 | Fuji Electric Co Ltd | Magnetic fluid seal device |
| CN2603249Y (en) * | 2002-03-23 | 2004-02-11 | 李名民 | Magnetic fluid sealing structure for transmission shaft |
| CN2620799Y (en) * | 2003-06-25 | 2004-06-16 | 成都环想科技发展有限责任公司 | Magnetic liquid sealing device with magnetic liquid tank for sealing oil |
| CN102537366A (en) * | 2012-01-05 | 2012-07-04 | 北京交通大学 | Sealing method for split type magnetic liquid sealing device |
| CN203098804U (en) * | 2013-02-05 | 2013-07-31 | 易杨直 | Electric locomotive gear box magnetic fluid sealing device |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108869752A (en) * | 2018-08-13 | 2018-11-23 | 广西科技大学 | A kind of change tooth change gap hybrid magnetic fluid seal structure for hydraulic cylinder |
| CN108869752B (en) * | 2018-08-13 | 2020-05-19 | 广西科技大学 | Tooth-variable and gap-variable mixed type magnetic fluid sealing structure for hydraulic cylinder |
| CN110939739A (en) * | 2019-12-16 | 2020-03-31 | 清华大学 | Magnetic powder and magnetic liquid combined sealing device |
| CN110939739B (en) * | 2019-12-16 | 2020-08-21 | 清华大学 | Magnetic powder and magnetic liquid combined sealing device |
| CN112387225A (en) * | 2020-10-30 | 2021-02-23 | 清华大学 | Composite magnetic medium sealing device for reaction kettle |
| CN112387225B (en) * | 2020-10-30 | 2021-09-07 | 清华大学 | Composite magnetic medium sealing device for reaction kettle |
| CN113639047A (en) * | 2020-12-28 | 2021-11-12 | 清华大学 | Magnetic liquid sealing device |
| CN113639047B (en) * | 2020-12-28 | 2022-07-05 | 清华大学 | Magnetic liquid sealing device |
| CN113839510A (en) * | 2021-09-26 | 2021-12-24 | 佛山德玛特智能装备科技有限公司 | Sealing structure and motor |
| CN113833858A (en) * | 2021-11-02 | 2021-12-24 | 北京交通大学 | Magnetic powder sealing liquid device with fluid dynamic pressure reverse conveying function |
| CN113833858B (en) * | 2021-11-02 | 2024-01-30 | 北京交通大学 | Magnetic powder sealing liquid device with fluid dynamic pressure feedback |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103925370B (en) | 2016-01-20 |
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Granted publication date: 20160120 Termination date: 20200429 |
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| CF01 | Termination of patent right due to non-payment of annual fee |