CN103322199B - Hazardous gas magnetic fluid seal device - Google Patents
Hazardous gas magnetic fluid seal device Download PDFInfo
- Publication number
- CN103322199B CN103322199B CN201310280680.2A CN201310280680A CN103322199B CN 103322199 B CN103322199 B CN 103322199B CN 201310280680 A CN201310280680 A CN 201310280680A CN 103322199 B CN103322199 B CN 103322199B
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- CN
- China
- Prior art keywords
- pole shoe
- baffle ring
- seal
- gas
- shaft
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
Abstract
Hazardous gas magnetic fluid seal device, belongs to sealing field of mechanical engineering.Solve the micro-leakage that existing sealing cannot detect hazardous gas before seal failure, when the gas that faces a danger is as hydrogen, the problem of explosion caused danger may be had.This device is loaded successively in shell left pole shoe, annular permanent magnet, right pole shoe; Baffle ring is connected and fixed by stud, pad one, pad two, pad three and nut and gas transducer, loads in housing; With screw, end cap and housing are linked together, realize axial restraint; Magnetic liquid is injected into the endoporus of permanent magnet, left pole shoe and right pole shoe circumferentially; In the endoporus formed after left pole shoe described in seal shaft is loaded, permanent magnet, right pole shoe, baffle ring assembling.Described seal shaft is multidiameter shaft.Baffle ring has shoulder hole, and shoulder hole boss circumferentially evenly has N number of through hole.Described gas transducer is connected on baffle ring.<!--1-->
Description
Technical field
The invention belongs to sealing field of mechanical engineering.
Background technique
Magnetic fluid sealing technology have cannot measure with state-of-the-art detecting instrument leak-down rate, without solid friction, the feature such as the life-span is long, structure is simple, in some particular application as hazardous gas seal aspect has other to seal irreplaceable effect.Existing magnetic liquid rotary seal method is if publication number is for as described in the patent application of CN102537366A.The fail-ure criterion of existing magnetic fluid sealing hears that seal arrangement sends gas and breaks through the sound of magnetic liquid and see that the liquid that is magnetic flows out for foundation from seal arrangement.But according to the failure mechanism of magnetic liquid, before magnetic fluid seal device just failure damage occurs, first magnetic fluid sealing place forms needle-like small hole leaking, now, can't hear the sound that gas breaks through magnetic liquid, also do not observe magnetic liquid and flow out.Therefore existing seal arrangement accurately can not judge whether the hazardous gas that magnetic liquid seals micro-leakage occurs, and when the gas that faces a danger is as hydrogen, if can not judge in time, whether gas leaks, then may have explosion caused danger.
Summary of the invention
The technical issues that need to address of the present invention are, existing seal arrangement accurately can not judge whether magnetic fluid sealing micro-leakage occurs, and when the gas that faces a danger is as hydrogen, if can not judge gases did escape in time, then may have explosion caused danger.
The technical solution adopted for the present invention to solve the technical problems is:
Hazardous gas magnetic fluid seal device, the connection between each several part forming this device:
This device the first rubber seal is embedded in the Baltimore groove on left pole shoe excircle, the second rubber seal embedded in the Baltimore groove on right pole shoe excircle.
Successively described left pole shoe, permanent magnet, right pole shoe are loaded in housing.
On the left of the boss N number of gas transducer being arranged on baffle ring shoulder hole, circumferentially equally distributed.
Gas transducer selects different Placements from the connection of baffle ring according to the different of sensor model number.
Described baffle ring is loaded in housing.
End cap is close to the right side of baffle ring, end cap and housing is linked together, realize axial restraint with screw;
Magnetic liquid is injected into the endoporus of permanent magnet, left pole shoe and right pole shoe circumferentially.
In the endoporus formed after left pole shoe described in seal shaft is loaded, permanent magnet, right pole shoe, baffle ring assembling.
Described baffle ring has shoulder hole.
Described gas transducer corresponds to sealed gas, and for example, if the gas of sealing is hydrogen, then gas transducer is hydrogen gas sensor, as 4H2-1000 type hydrogen gas sensor.
The lighting outlet of described gas transducer is from outside the through hole ejector end cap, and lighting outlet is connected with sensor alarm system, and when gas transducer detects hazardous gas spillage, the warning device in alarm system then sounds the alarm.
Described end cap has N number of through hole, and its quantity is equal with sensor number, for by outside sensor lighting outlet ejector.
During assembling, the axis of gas transducer is between the top circle and seal shaft excircle of right pole shoe pole tooth.
Described seal shaft is multidiameter shaft, and during assembling, the ladder anchor ring of seal shaft aligns with the right side of right pole shoe.
The present invention compares had beneficial effect with prior art:
Before sealing was lost efficacy, first there is needle-like aperture in magnetic liquid O type circle, the hazardous gas of seldom amount is had to start to spill, now N number of gas transducer can detect hazardous gas spillage, alarm system gives the alarm, then stop immediately making gas transducer the leakage of hazardous gas no longer be detected to pressurizeing in Seal cage and reducing pressure.
The present invention utilizes gas transducer can detect the micro-leakage of hazardous gas before seal failure, thus can stop in time pressurizeing in Seal cage, avoids hazardous gas such as hydrogen and leaks the explosion risk that may cause in a large number.
Accompanying drawing explanation
Fig. 1 magnetic fluid sealing erection drawing.
A-A partial sectional view in Fig. 2 Fig. 1.
The bonding enlarged view in I local in Fig. 3 Fig. 1.
The enlarged view that is threaded of I local in Fig. 4 Fig. 1.
II partial enlarged drawing in Fig. 5 Fig. 1.
In figure: shell 1, left pole shoe 2, permanent magnet 3, right pole shoe 4, baffle ring 5, end cap 6, screw 7, sensor lighting outlet 8, gas transducer 9, second rubber seal 10, first rubber seal 11, seal shaft 12, stud 13, nut 14, through hole 15.
Embodiment
Hazardous gas magnetic fluid seal device, as shown in Figure 1, Figure 2, Figure 3 and Figure 4, the connection between each several part forming this device:
This device the first rubber seal 11 is embedded in the Baltimore groove on left pole shoe 2 excircle, the second rubber seal 10 embedded in the Baltimore groove on right pole shoe 4 excircle.
Successively described left pole shoe 2, permanent magnet 3, right pole shoe 4 are loaded in housing 1.
N number of gas transducer 9 is arranged on the left of the boss of baffle ring 5 shoulder hole, circumferentially equally distributed.
Described baffle ring 5 is loaded in housing 1.
Gas transducer 9 selects different Placements from the connection of baffle ring 5 according to selected the different of gas transducer 9 model, as adopted the connection scheme in Fig. 3, is namely directly bonded on baffle ring 5 with metal-to-metal adhesive by gas transducer 9; Or the connection scheme in employing Fig. 4, namely with stud 13, nut 14, gas transducer 9 is fastened on baffle ring 5.
Described baffle ring 5 is loaded in housing 1.
End cap 6 is close to the right side of baffle ring 5, end cap 6 and housing 1 is linked together, realize axial restraint with screw 7.
Magnetic liquid is injected into the endoporus of permanent magnet 3, left pole shoe 2 and right pole shoe 4 circumferentially.
Seal shaft 12 is loaded described left pole shoe 2, permanent magnet 3, right pole shoe 4, baffle ring 5 assemble in the endoporus of rear formation.
Described baffle ring 5 has shoulder hole.
Number N=3 ~ 6 of gas transducer, get its end value or the integer value in the middle of it.
Described gas transducer 9 corresponds to sealed gas, and for example, if the gas of sealing is hydrogen, then gas transducer 9 is hydrogen gas sensor, as 4H2-1000 type hydrogen gas sensor.
The lighting outlet 8 of described gas transducer 9 is from outside through hole 15 ejector on end cap 6, and lighting outlet 8 is connected with sensor alarm system, and when gas transducer detects hazardous gas spillage, the warning device in alarm system then sounds the alarm.
Described end cap 6 has N number of through hole, and its quantity is equal with sensor number, for by outside sensor lighting outlet 8 ejector.
During assembling, the axis of gas transducer 9 is between the top circle and seal shaft 12 excircle of right pole shoe 4 pole tooth.
Described seal shaft 12 is multidiameter shaft, and the first diameter D1 22 ~ 25mm larger than Second bobbin diameter D2 of seal shaft 12, during assembling, the ladder anchor ring of seal shaft 12 aligns with the right side of right pole shoe 4.
The material selection electrical pure iron of left pole shoe 2 and right pole shoe 4.
Shell 1, screw 7, baffle ring 5 and end cap 6 all adopt nonmagnetic substance such as stainless steel to make.
Permanent magnet 3 selects Rb-Fe-B material.
The kind of magnetic liquid, according to the magnetic liquid of sealing gas base load liquid different from the different choice of ambient temperature, can select Kerosene-Base Magnetic Fluid or machine oil based magnetic liquid usually.
Claims (2)
1. hazardous gas magnetic fluid seal device, the connection between each several part forming this device:
This device embeds in the Baltimore groove on left pole shoe (2) excircle by the first rubber seal (11), the second rubber seal (10) embedded in the Baltimore groove on right pole shoe (4) excircle;
Successively described left pole shoe (2), permanent magnet (3), right pole shoe (4) are loaded in housing (1);
Baffle ring (5) is loaded in housing (1);
End cap (6) is close to the right side of baffle ring (5), end cap (6) and housing (1) is linked together, realize axial restraint with screw (7);
Magnetic liquid is injected into the endoporus of permanent magnet (3), left pole shoe (2) and right pole shoe (4) circumferentially;
In the endoporus formed after left pole shoe (2) described in seal shaft (12) is loaded, permanent magnet (3), right pole shoe (4), baffle ring (5) assembling;
It is characterized in that:
Described baffle ring (5) has shoulder hole;
N number of gas transducer (9) is arranged on the left of the boss of baffle ring (5) shoulder hole, circumferentially equally distributed;
Gas transducer (9) selects different Placements from the connection of baffle ring (5) according to the different of selected gas transducer (9) model;
During assembling, the axis of described gas transducer (9) is between the top circle and seal shaft (12) excircle of right pole shoe (4) pole tooth;
Described seal shaft (12) is multidiameter shaft, and during assembling, the ladder anchor ring of seal shaft (12) aligns with the right side of right pole shoe (4).
2. hazardous gas magnetic fluid seal device according to claim 1, is characterized in that:
Number N=3 ~ 6 of described gas transducer (9);
Described seal shaft (12) is multidiameter shaft, its first diameter D1 22 ~ 25mm larger than Second bobbin diameter D2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310280680.2A CN103322199B (en) | 2013-07-05 | 2013-07-05 | Hazardous gas magnetic fluid seal device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310280680.2A CN103322199B (en) | 2013-07-05 | 2013-07-05 | Hazardous gas magnetic fluid seal device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103322199A CN103322199A (en) | 2013-09-25 |
| CN103322199B true CN103322199B (en) | 2015-11-18 |
Family
ID=49191134
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310280680.2A Expired - Fee Related CN103322199B (en) | 2013-07-05 | 2013-07-05 | Hazardous gas magnetic fluid seal device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103322199B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1546890A (en) * | 2003-12-10 | 2004-11-17 | 北京交通大学 | Sealing device with uniformly distributed magnetic liquid |
| CN2660238Y (en) * | 2003-12-12 | 2004-12-01 | 北京交通大学 | Magnetic liquid sealing device of reducing radial space size |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60172776A (en) * | 1984-02-17 | 1985-09-06 | Nippon Fueroo Furuideikusu Kk | Seal device for rotary shaft, utilizing magnetic fluid |
| JP2000205417A (en) * | 1999-01-11 | 2000-07-25 | Ntn Corp | Magnetic fluid seal and vacuum spindle device using the same |
| US20100230901A1 (en) * | 2009-03-12 | 2010-09-16 | Ferrotec (Uk), Ltd. | Magnetic fluid rotary feedthrough with sensing and communication capability |
| US8531195B2 (en) * | 2010-08-26 | 2013-09-10 | Ferrotec (Usa) Corporation | Failure indicator seal for a rotary feedthrough |
-
2013
- 2013-07-05 CN CN201310280680.2A patent/CN103322199B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1546890A (en) * | 2003-12-10 | 2004-11-17 | 北京交通大学 | Sealing device with uniformly distributed magnetic liquid |
| CN2660238Y (en) * | 2003-12-12 | 2004-12-01 | 北京交通大学 | Magnetic liquid sealing device of reducing radial space size |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103322199A (en) | 2013-09-25 |
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Legal Events
| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151118 Termination date: 20200705 |