CN101776146A - Large-diameter large-gap magnetic liquid static seal structure - Google Patents
Large-diameter large-gap magnetic liquid static seal structure Download PDFInfo
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- CN101776146A CN101776146A CN 201010116887 CN201010116887A CN101776146A CN 101776146 A CN101776146 A CN 101776146A CN 201010116887 CN201010116887 CN 201010116887 CN 201010116887 A CN201010116887 A CN 201010116887A CN 101776146 A CN101776146 A CN 101776146A
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Abstract
The invention discloses a large-diameter large-gap magnetic liquid static seal structure comprising a housing (2), a seal assembly, magnetic liquid and a chassis (12), wherein the housing is made of a nonmagnetic material and is welded and connected with a seal body (1); the seal assembly is arranged in the groove of the housing; the magnetic liquid is filled on the inner ring surface of an annular permanent magnet (6); a gasket (10) is arranged between a chassis and the housing; the chassis, the gasket and the housing are tightly fixed by bolts (11) to ensure the seal gap by adjusting the thickness of the gasket; on the chassis, an inner seal tooth (4) and an outer seal tooth (9) are manufactured; the parameters of the tooth profile of the seal tooth are as follows: tooth width is 1 mm, tooth height is 3 mm, and groove width is 3 mm. The seal assembly is formed by splicing an annular inner pole shoe (5) embedded into an O-shaped seal ring, an annular permanent magnet and an annular outer pole shoe (7) embedded into the O-shaped seal ring in sequence. The invention solves the problem of the static pressure sealing of magnetic liquid of which the seal shaft diameter is more than 300 mm and the seal gap exceeds 1 mm.
Description
Technical field
The invention belongs to the mechanical engineering technical field of sealing technology, be specially adapted to the magnetic liquid standstill seal under the large-diameter large-gap condition.
Background technique
Seal clearance is generally 0.05-0.15mm in the magnetic liquid sealing structure under the usual conditions, and maximum is no more than 0.25mm.But in metallurgy industry, aviation, navigation field, need the sealing diameter of axle greater than 300mm, seal clearance seals above the effective pressure to gas under the 1mm condition, and requires sealed body and sealing configuration to dismantle easily, and can adjust seal clearance.And traditional employing gasket seal can bring problems such as assembling difficulty, distortion inequality and sealing effect difference, the sealing of other form also can run into difficult problems such as complicated in mechanical structure or sealing components and parts processing difficulties.
Summary of the invention
Technical problem to be solved by this invention is, need to seal the diameter of axle greater than 300mm in some special sealing occasion in military project and the industrial production, seal clearance surpasses the static pressure sealing of 1mm, and a kind of magnetic liquid static seal structure that is used under the large-diameter large-gap condition is provided.
Technological scheme of the present invention:
A kind of large-diameter large-gap magnetic liquid static seal structure, this structure comprises: shell, black box, magnetic liquid, chassis.
Shell is made by nonmagnetic substance, is welded to connect with seal body; Black box is placed in the groove of shell, on the inner ring surface of annular permanent magnet, injects magnetic liquid; Be lined with pad between chassis and shell, chassis, pad and shell tightened together, guarantee seal clearance by the thickness of adjusting pad with screw.
On the chassis, apart from center line r
1And r
2Sealing tooth and external sealed tooth in the place begins to make, the tooth profile parameter of sealing tooth is: facewidth 1mm, tooth depth 3mm, groove width 3mm.
Effect of the present invention is, owing to seal tooth and external sealed tooth on the chassis, making and guarantee seal clearance by the thickness of adjusting pad, thereby realized the magnetic liquid static seal under the large-diameter large-gap condition, and be convenient to processing, assembling simply, long service life has been widened the using scope of magnetic liquid in sealing.
Description of drawings
Fig. 1 large-diameter large-gap magnetic liquid static seal structure plan view.
The attached view of Fig. 2 large-diameter large-gap magnetic liquid static seal structure.
Fig. 3 chassis sectional drawing.
The A of Fig. 4 Fig. 3 and the partial enlarged drawing of B.
Among the figure, seal body 1, shell 2, O-ring seals 3, interior sealing tooth 4, interior pole shoe 5, permanent magnet 6, outer pole shoe 7, O-ring seals 8, external sealed tooth 9, pad 10, screw 11, chassis 12.
Embodiment
With the accompanying drawing is that the invention will be further described for embodiment:
A kind of large-diameter large-gap magnetic liquid static seal structure is seen Fig. 1,2.This structure comprises: shell 2, black box, magnetic liquid, chassis 12.
Shell 2 is made by nonmagnetic substance, is welded to connect with seal body 1; Black box is placed in the groove of shell 2, on the inner ring surface of annular permanent magnet 6, injects magnetic liquid; 2 on chassis 12 and shell are lined with pad 10, with screw 11 chassis 12, pad 10 and shell 2 are tightened together, and regulate the thickness of adjusting pad 10 and guarantee seal clearance;
On chassis 12, apart from center line r
1And r
2Sealing tooth 4 and external sealed tooth 9 in the place begins to make.The sealing tooth be shaped as rectangle, each tooth measure-alike, the tooth profile parameter of sealing tooth is: facewidth 1mm, tooth depth 3mm, groove width 3mm, see Fig. 3,4.
Black box comprises: O-ring seals 3 is embedded in the groove of pole shoe 5 in the annular, form the outer pole shoe 5 of annular that embeds O-ring seals; O-ring seals 8 is embedded in the groove of the outer pole shoe 7 of annular, form the outer pole shoe 7 of annular that embeds O-ring seals.
Annular permanent magnet 6 is clipped on the step of interior pole shoe 5 of the annular that embeds O-ring seals and the outer pole shoe 7 of annular that embeds O-ring seals, bonds together, and constitutes black box.
Being welded to connect of 2 on body 1 and shell wants accurate, guarantees that sealed medium is not from weld leakage.
The interior sealing tooth 4 that pole shoe 5 is aimed on the chassis 12 in the annular, the external sealed tooth 9 that the outer pole shoe 7 of annular is aimed on the chassis 12.Thickness 0.1～the 5mm of pad 10 is adjusted by pad 10 in the gap that interior pole shoe 5 of annular and the outer pole shoe 7 of annular and sealing tooth are 4.
Shell 2, pad 10, screw 11 are all made by nonmagnetic substance, as stainless steel etc.
Select neodymium iron boron for use under annular permanent magnet 6 normal temperature, temperature is selected SmCo for use in time more than 300 ℃, and temperature is aluminium nickel cobalt in the time of 400 ℃.
The material of pole shoe 5, the outer pole shoe 7 of annular is an electrical pure iron in the annular.
The material of pad 10 is a brass.
Select kerosene or hydrocarbon or diester class base load liquid for use during the general vacuum seal of magnetic liquid, select fluorocarbon radical base load liquid during acid resistant alkali for use, select high-quality burning oil or silicate lipid or diester class base load liquid under the low temperature for use.
Use-case: annular permanent magnet 6 neutral position diameters are the sealing configuration of the shell body device design of 390mm, the interior external sealed number of teeth on its chassis is respectively 4, seal clearance is 1.5mm, sealing tooth tooth depth 3mm, facewidth 1mm, spacewidth 3mm uses the ester group Fe 3 O 4 magnetic liquid of saturation magnetization as 358Gs, permanent magnet is selected NdFeB material for use, and pressure resistance can reach 0.0252MPa.
Claims (2)
1. large-diameter large-gap magnetic liquid static seal structure, this structure comprises: shell, black box, magnetic liquid, chassis; It is characterized in that:
Shell (2) is made by nonmagnetic substance, is welded to connect with seal body (1); Black box is placed in the groove of shell (2), on the inner ring surface of annular permanent magnet (6), injects magnetic liquid; Be lined with pad (10) between chassis (12) and shell (2), chassis (12), pad (10) and shell (2) tightened together, guarantee seal clearance by the thickness of adjusting pad with screw (11);
On chassis (12), apart from center line r
1And r
2Sealing tooth (4) and external sealed tooth (9) in the place begins to make, the tooth profile parameter of sealing tooth is: facewidth 1mm, tooth depth 3mm, groove width 3mm.
2. large-diameter large-gap magnetic liquid static seal structure according to claim 1, it is characterized in that: black box comprises: the outer pole shoe of annular (7) of pole shoe (5), annular permanent magnet (6), embedding O-ring seals bonds together in proper order in the annular of embedding O-ring seals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101168872A CN101776146B (en) | 2010-03-02 | 2010-03-02 | Large-diameter large-gap magnetic liquid static seal structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101168872A CN101776146B (en) | 2010-03-02 | 2010-03-02 | Large-diameter large-gap magnetic liquid static seal structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101776146A true CN101776146A (en) | 2010-07-14 |
| CN101776146B CN101776146B (en) | 2012-02-01 |
Family
ID=42512687
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010101168872A Expired - Fee Related CN101776146B (en) | 2010-03-02 | 2010-03-02 | Large-diameter large-gap magnetic liquid static seal structure |
Country Status (1)
| Country | Link |
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| CN (1) | CN101776146B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102425672A (en) * | 2011-08-19 | 2012-04-25 | 北京交通大学 | Split magnetic liquid sealing device |
| CN103925362A (en) * | 2014-04-16 | 2014-07-16 | 上海威尔泰仪器仪表有限公司 | Static sealing structure for electronic device |
| CN105221753A (en) * | 2015-09-09 | 2016-01-06 | 北京交通大学 | Radial magnetic liquid rotating sealing device |
| CN109812831A (en) * | 2019-03-11 | 2019-05-28 | 西安西热节能技术有限公司 | A kind of magnetic suspension support structure of air preheater diaphragm seal |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03213775A (en) * | 1990-01-17 | 1991-09-19 | Hitachi Ltd | Vacuum seal |
| CN2447583Y (en) * | 2000-11-03 | 2001-09-12 | 罗喜梅 | Magnetofluid sealing device for vacuum equipment driving shaft capable of forced cooling |
| CN1540191A (en) * | 2003-10-24 | 2004-10-27 | 北京交通大学 | Magnetic liquid gasket type seal set in use for flange with super large diameter |
-
2010
- 2010-03-02 CN CN2010101168872A patent/CN101776146B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03213775A (en) * | 1990-01-17 | 1991-09-19 | Hitachi Ltd | Vacuum seal |
| CN2447583Y (en) * | 2000-11-03 | 2001-09-12 | 罗喜梅 | Magnetofluid sealing device for vacuum equipment driving shaft capable of forced cooling |
| CN1540191A (en) * | 2003-10-24 | 2004-10-27 | 北京交通大学 | Magnetic liquid gasket type seal set in use for flange with super large diameter |
Non-Patent Citations (2)
| Title |
|---|
| 《流体密封技术》 20060630 韩建勇，等 磁流体密封 哈尔滨地图出版社 159-182 1-2 , 1 * |
| 《真空科学与技术学报》 20080430 何新智，等 大直径法兰磁性液体静密封的实验研究 179-181 1-2 第28卷, 第2期 2 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102425672A (en) * | 2011-08-19 | 2012-04-25 | 北京交通大学 | Split magnetic liquid sealing device |
| CN102425672B (en) * | 2011-08-19 | 2014-04-09 | 北京交通大学 | Split magnetic liquid sealing device |
| CN103925362A (en) * | 2014-04-16 | 2014-07-16 | 上海威尔泰仪器仪表有限公司 | Static sealing structure for electronic device |
| CN103925362B (en) * | 2014-04-16 | 2017-01-18 | 上海威尔泰仪器仪表有限公司 | Static sealing structure for electronic device |
| CN105221753A (en) * | 2015-09-09 | 2016-01-06 | 北京交通大学 | Radial magnetic liquid rotating sealing device |
| CN105221753B (en) * | 2015-09-09 | 2017-04-05 | 北京交通大学 | Radial direction magnetic liquid rotating sealing device |
| CN109812831A (en) * | 2019-03-11 | 2019-05-28 | 西安西热节能技术有限公司 | A kind of magnetic suspension support structure of air preheater diaphragm seal |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101776146B (en) | 2012-02-01 |
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Granted publication date: 20120201 Termination date: 20210302 |
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