CN101975278B - Self-healing seal device based on magnetorheological rubber and magnetorheological grease and reciprocating mechanism - Google Patents
Self-healing seal device based on magnetorheological rubber and magnetorheological grease and reciprocating mechanism Download PDFInfo
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- CN101975278B CN101975278B CN2010105310059A CN201010531005A CN101975278B CN 101975278 B CN101975278 B CN 101975278B CN 2010105310059 A CN2010105310059 A CN 2010105310059A CN 201010531005 A CN201010531005 A CN 201010531005A CN 101975278 B CN101975278 B CN 101975278B
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Abstract
The invention relates to a self-healing seal device based on magnetorheological rubber and magnetorheological grease and a reciprocating mechanism. The self-healing seal device comprises a multilevel rubber seal and a multilevel magnetic seal, wherein the multilevel rubber seal comprises an upper skeleton magnetic pole, a lower skeleton magnetic pole, magnetorheological rubber with a lip, magnetorheological rubber with two lips and a permanent magnet; the permanent magnet is arranged between the upper skeleton magnetic pole and the lower skeleton magnetic pole; the magnetorheological rubber with a lip is arranged on one surface of the upper skeleton magnetic pole far from the lower skeleton magnetic pole; the magnetorheological rubber with two lips is arranged on one surface of the lower skeleton magnetic pole far from the upper skeleton magnetic pole, seal cavities are formed among the lower skeleton magnetic pole, the upper skeleton magnetic pole, the permanent magnet, the magnetorheological rubber and a movable axis, and the magnetorheological grease is filled into the seal cavities. Because the traditional rubber is replaced by the magnetorheological rubber, by using the long-period absorption effect of the movable axis by the magnetorheological rubber under the action of a magnetic field, a gap caused by the abrasion between the magnetorheological rubber and the movable axis and the failure for the elastic deterioration of the magnetorheological rubber can be compensated, and the self-healing seal function of the magnetorheological rubber is realized.
Description
Technical field
The present invention relates to a kind of mechanical engineering seal arrangement; Particularly seal about a kind of suspension damper reciprocator that is used for high-speed track vehicle and heavy ground wheeled vehicle, and the self-healing seal arrangement and the reciprocator based on magnetorheological rubber and magneto-rheological grease of the rotating machinery sealing in ship propeller, lifting airscrew, wind-power electricity generation equipment and the high-vacuum apparatus.
Background technique
At present, Sealing mainly comprises rubber seal and magnetic fluid sealing spare, is used for sealing in the annular gap between axle and housing.Rubber seal normally is bonded at rubber heat on the metal ring, because rubber has advantages such as higher elasticity macromolecular material character and wider temperature range, thereby in static seal, is widely used.But for motive sealing; Especially have in the reciprocator and rotating machinery of relative movement between travel axis (reciprocating shaft or running shaft) and the housing; The high temperature, the high pressure that exist in relative to-and-fro motion or the rotary movement between travel axis and the housing cause the caulking gum elastic performance deterioration on the rubber seal easily; And the fretting wear between travel axis and the rubber seal causes seal clearance to increase, more than two factor acting in conjunction meetings bring out seal leakage.
Like Chinese patent: reciprocating seal part (application number 03824141.2; Applying date 2003.9.19); A plurality of projections of in axial direction extending are set on the sliding contact surface of sealed lip, suppress the increase of the frictional force of generation between sealing lip and the axle, improve the frictional force characteristic of Sealing with this.Yet in high-speed track vehicle (intercity bullet train, city railway vehicle) and heavy ground wheeled vehicle (armored vehicle, heavy-duty car) suspension (suspension) vibration damper; This reciprocating seal part also exists huge pressure reduction unavoidably to make the shock absorber oil in the housing leak through seal clearance except easy abrasion at the Sealing two ends.
Magnetic fluid sealing spare is the encapsulating method that adopts the annular gap between local high magnetic fields and magnetic liquid shutoff axle and the housing, is applicable to the motive sealing that has relative movement between axle and the housing.In solving low differential pressure and the slow-speed of revolution sealing problem that pressure reduction is not more than 0.3 MPa, obtained the important techniques progress based on the magnetic fluid sealing spare of magnetic liquid.Like Chinese patent: a kind of magnetic fluid seal device (application number 200610052794.1; Applying date 2006.8.1); In order to increase the useful flux on the seal clearance path; This application is formed the magnetic pole circle alternately with several pole shoe ring and permanent-magnetic clamp, and the polarity of adjacent and close permanent-magnetic clamp is opposite, filling magnetic liquid in seal clearance.Above-mentioned magnetic fluid seal device can improve in the seal clearance power distribute alternately field gradients and amplitude of variation, but structure is very complicated, and parts are more.And for the motive sealing problem under High Pressure Difference and the high rotating speed environment, because the low shear strength of magnetic liquid and the centrifugal action of high speed rotating can cause magnetic seal to be easy to occur leaking.Simultaneously, for the travel axis that moves reciprocatingly, the surface microscopic ripple of travel axis can carry some magnetic liquids, and long-term to-and-fro motion meeting causes seal failure because of the minimizing of magnetic liquid capacity.
Therefore, traditional simple rubber seal and magnetic seal technology can not satisfy the high movement velocity in the motive sealing, big pressure reduction and requirement reliably and with long-term.
Summary of the invention
The present invention is directed to existing rubbery sealed body and produce seal clearance because of factors such as ageing of rubber and wearing and tearing; Seal failure that causes and leakage problem; And the magnetic seal body is owing to low seal failure that causes of magnetic liquid shear strength and leakage problem; Proposed a kind ofly not only can under the environment of High Pressure Difference, high motion speed, realize motive sealing reliably and with long-term; And has a combination self-healing sealing function; Can be effectively the aging and wearing and tearing of rubber seal be compensated, can effectively solve in the reciprocator the self-healing seal arrangement that carries Problem of Failure of magnetic liquid in the magnetic fluid sealing spare based on magnetorheological rubber and magneto-rheological grease effect, and the reciprocator that uses this self-healing seal arrangement.
Technological scheme of the present invention is following:
A kind of self-healing seal arrangement; It is characterized in that: it comprises upper skeleton magnetic pole, lower skeleton magnetic pole, the first magnetorheological rubber, second magnetorheological rubber and the permanent magnet; Said upper skeleton magnetic pole, lower skeleton magnetic pole, the first magnetorheological rubber, the second magnetorheological rubber are ring and coaxial setting, and said permanent magnet is arranged between upper skeleton magnetic pole and the lower skeleton magnetic pole; The said first magnetorheological rubber is arranged on the one side away from said lower skeleton magnetic pole of said upper skeleton magnetic pole; The said second magnetorheological rubber is arranged on the one side away from the upper skeleton magnetic pole of lower skeleton magnetic pole; The inner edge and the travel axis of the said first magnetorheological rubber and the second magnetorheological rubber join; Form Seal cage between said lower skeleton magnetic pole, upper skeleton magnetic pole, permanent magnet, magnetorheological rubber and the travel axis, fill magneto-rheological grease in the said Seal cage.
Magnetorheological rubber body is filled the slit between upper skeleton magnetic pole and the lower skeleton magnetic pole, and said self-healing seal arrangement is encapsulated.
The said first magnetorheological rubber is the magnetorheological rubber with one lip, and the said second magnetorheological rubber is the magnetorheological rubber of band twice lip, and said lip extends to said travel axis direction by the inner edge of magnetorheological rubber.
On the outer rim of the magnetorheological rubber of said band twice lip a holddown spring is set.
The magnetic pole spur of extending to the travel axis direction is set on the inner edge of said lower skeleton magnetic pole and upper skeleton magnetic pole.
A kind of reciprocator that uses the self-healing seal arrangement; It is characterized in that: it also comprises inner chamber and travel axis; Wherein said inner chamber is a seal chamber; Said self-healing seal arrangement is arranged on the connection part of said inner chamber and travel axis, and the end with the magnetorheological rubber of one lip in the said self-healing seal arrangement is installed in the said inner chamber outside, and it is inboard that an end of the magnetorheological rubber of band twice lip is installed in said inner chamber; Said travel axis is a magnet case.
The travel axis surface is carried out MICRO-CRACK CHROMIUM PLATING and is handled.
The particulate of magneto-rheological grease can not be embedded in the said microscopic crack.
Technique effect of the present invention is following:
Self-healing seal arrangement of the present invention comprises multistage rubber seal and the multistage magnetic seal of being made up of upper skeleton magnetic pole, lower skeleton magnetic pole, the first magnetorheological rubber, the second magnetorheological rubber and permanent magnet.Wherein permanent magnet is arranged between upper skeleton magnetic pole and the lower skeleton magnetic pole; The first magnetorheological rubber is arranged on the one side away from the lower skeleton magnetic pole of upper skeleton magnetic pole; The second magnetorheological rubber is arranged on the one side away from the upper skeleton magnetic pole of lower skeleton magnetic pole; Form Seal cage between lower skeleton magnetic pole, upper skeleton magnetic pole, permanent magnet, magnetorheological rubber and the travel axis, fill magneto-rheological grease in the Seal cage.The present invention is owing to replace traditional rubber with magnetorheological rubber; Utilize magnetorheological rubber long-term adsorption effect to travel axis under the action of a magnetic field; Can compensate between magnetorheological rubber and the travel axis because the inefficacy that space that wearing and tearing are caused and magnetorheological rubber elasticity deterioration cause realizes magnetorheological rubber self-healing sealing function.
Self-healing seal arrangement of the present invention two ends are provided with the sealing of twice magneto-rheological grease altogether; Be arranged on together between the magnetic pole spur of lower skeleton magnetic pole and upper skeleton magnetic pole; Another road is arranged between magnetic pole spur and the rubber lip; Because magneto-rheological grease has very high shear yield strength, can be because of pressure reduction does not take place greatly to flow, so self-healing seal arrangement of the present invention can be realized big pressure reduction sealing.And the high shear strength of magneto-rheological grease compares with the traditional magnetic liquid phase under the high speed rotating condition, is not prone to leakage.The aggregation of magneto-rheological grease also makes magneto-rheological grease lip on lip and magneto-rheological grease under the magneto-rheological grease of magnetic pole spur place formation assemble simultaneously, makes the sealing of self-healing seal arrangement have self-healing property.
Reciprocating rotary mechanism of the present invention also carries out MICRO-CRACK CHROMIUM PLATING with the travel axis surface and handles strict controlled motion axle configuration of surface except that using the self-healing seal arrangement.Under the scraping action of magnetorheological rubber; Magnetizable magneto-rheological grease particulate can not carry by the surperficial small ripple of passive movement axle; Simultaneously, the grease in the magneto-rheological grease is retained in the minimizing of can not volatilizing in the small ripple of reciprocating shaft, occupies the microscopic crack space; In use can not carried yet, solved traditional magnetic liquid and in use carried a difficult problem that causes seal failure.The grease that is retained in simultaneously in the small ripple of reciprocating shaft can play lubricated effect to magnetorheological rubber, thereby reduces the wearing and tearing of magnetorheological rubber, improves the working life of combination seal.
In addition; That end that reciprocating rotary mechanism is installed in the vibration damper exocoel is provided with the magnetorheological rubber seal with one lip; That end that is installed in the vibration damper inner chamber is provided with the magnetorheological rubber seal of band twice lip, the big pressure reduction problem of exocoel in can helping like this to solve.
Description of drawings:
Fig. 1 be among the present invention when travel axis moves reciprocatingly with respect to housing the cross-sectional schematic of self-healing seal arrangement
Fig. 2 be among the present invention when travel axis rotates with respect to housing the cross-sectional schematic of self-healing seal arrangement
Fig. 3 is the partial structurtes schematic representation of self-healing seal arrangement of the present invention
Fig. 4 is crizzle chromium plating handling principle figure of the present invention
Wherein, The magnetorheological rubber body of 1-; 2-lower skeleton magnetic pole; The 3-holddown spring; Lip under the magnetorheological rubber of 4-second road; Lip under the magnetorheological rubber of 5-first road; Lip on the magnetorheological rubber of 6-; Lip under the 7-magneto-rheological grease; The magnetorheological rubber of 8-band twice lip; The 9-permanent magnet; The 12-magnetic flux; Lip on the 13-magneto-rheological grease; The 14-travel axis; The 15-Seal cage; 16-is with the magnetorheological rubber of one lip; 18-upper skeleton magnetic pole; The 20-rubber lip; The scraping of 21-rubber; 22-magneto-rheological grease particulate; The 23-configuration of surface; 24-magneto-rheological grease grease.
Embodiment:
Below in conjunction with accompanying drawing structure of the present invention is described further.
Like Fig. 1, shown in Figure 2; In order to improve sealing reliability; Can adopt multistage rubber seal and multistage magnetic seal; Thereby self-healing seal arrangement of the present invention comprises around the movement axle 14, and the magnetorheological rubber 8 of the magnetorheological rubber body 1 of extending along travel axis 14 radial direction, lower skeleton magnetic pole 2, holddown spring 3, band twice lip, permanent magnet 9, with the magnetorheological rubber 16 and the upper skeleton magnetic pole 18 of one lip.Wherein, lower skeleton magnetic pole 2 all has the magnetic pole spur of extending to travel axis 14 directions with upper skeleton magnetic pole 18, and lower skeleton magnetic pole 2 and upper skeleton magnetic pole 18 setting at interval, forms the framework of an annular.Magnetorheological rubber body 1 is filled in the slit between lower skeleton magnetic pole 2 and the upper skeleton magnetic pole 18, and at the outside coating that forms of framework that lower skeleton magnetic pole 2 and upper skeleton magnetic pole 18 form, is used to protect whole self-healing seal arrangement.Permanent magnet 9 is in the annulus between lower skeleton magnetic pole 2 and the upper skeleton magnetic pole 18, and is fixed near travel axis 14 1 sides.
Be arranged on the one side away from lower skeleton magnetic pole 2 of upper skeleton magnetic pole 18 with the magnetorheological rubber 16 of one lip, under the effect of externally-applied magnetic field, be adsorbed near travel axis 14 1 sides; Lip 6 on the one magnetorheological rubber that joins with travel axis 14 is set on the inner edge with the magnetorheological rubber 16 of one lip.The magnetorheological rubber 8 of band twice lip is arranged on the one side away from upper skeleton magnetic pole 18 of lower skeleton magnetic pole 2, under the effect of externally-applied magnetic field, is adsorbed near travel axis 14 1 sides; Lip 5 under lip 4 and magnetorheological rubber first road under magnetorheological rubber second road that setting and travel axis 14 join on the inner edge of the magnetorheological rubber 8 of band twice lip.On the outer rim of magnetorheological rubber 8 away from travel axis 14 of band twice lip, holddown spring 3 is set, makes the magnetorheological rubber 8 of band twice lip fit tightly with travel axis 14.
Between lower skeleton magnetic pole 2, upper skeleton magnetic pole 18, permanent magnet 9, magnetorheological rubber 16, the magnetorheological rubber 8 of being with the twice lip and travel axis 14, fill magneto-rheological grease in the formed Seal cage 15 with one lip.The magnet case of lower skeleton magnetic pole 2, upper skeleton magnetic pole 18 for processing by No. ten low carbon steel; Travel axis 14 magnet case for being processed by two No. ten low carbon steel, the magnetorheological rubber 8 of magnetorheological rubber body 1, band twice lip is with the magnet case of magnetorheological rubber 16 for being made up of high molecular polymer and magnetizable particles with lip.The magnetorheological rubber 8 of permanent magnet 9, magnetorheological rubber body 1, lower skeleton magnetic pole 2, band twice lip, magneto-rheological grease, travel axis 14, upper skeleton magnetic pole 18, with the magnetorheological rubber 16 common magnetic circuits that constitute whole self-healing seal arrangement magnetic field of one lip, magnetic flux 12 through providing in the magnetic circuit by permanent magnet 9.
With the magnetorheological rubber 16 of one lip under the effect of magnetic flux 12; Travel axis 14 to magnetic conductivity has the magnetic suction-operated; Under the acting in conjunction of magnetic adsorptive power and magnetorheological rubber elasticity; Magnetorheological rubber 16 with one lip tightly is adsorbed on the travel axis 14, and lip 6 places form together magnetorheological rubber self-healing sealing on magnetorheological rubber.The magnetorheological rubber 8 of band twice lip is under the effect of magnetic flux 12; Travel axis 14 to magnetic conductivity has the magnetic suction-operated; Under the acting in conjunction of magnetic adsorptive power, magnetorheological rubber elasticity and holddown spring 3; The magnetorheological rubber 8 of band twice lip tightly is adsorbed on the travel axis 14, and lip 5 places form magnetorheological rubber self-healing sealing under lip under magnetorheological rubber second road 4 and magnetorheological rubber first road.In the sealing for the reciprocator in the vibration damper; Because pressure is up to tens of kPas in the shock absorber sealing inner chamber; So an end of the magnetorheological rubber 16 of one lip of band of self-healing seal arrangement is installed in the vibration damper exocoel; One end of the magnetorheological rubber 8 of being with the twice lip is installed in the vibration damper inner chamber, so just can solves vibration damper inner chamber and the big problem of exocoel pressure reduction.
As shown in Figure 3; Magneto-rheological grease in the Seal cage 15 forms lip 13 on the magneto-rheological grease at the magnetic pole spur place near upper skeleton magnetic pole 18; Magnetic pole spur place near lower skeleton magnetic pole 2 forms lip 7 under the magneto-rheological grease; Because it is very little with 2 the magnetic pole spur place vertical area that passes of the magnetic line of force at last lower skeleton magnetic pole 18; The Magnetic flux density at magnetic pole spur place is very big, thereby the magneto-rheological grease that is filled in the Seal cage 15 accumulates in the magnetic pole spur place of upper skeleton magnetic pole 18 and lower skeleton magnetic pole 2 down in 12 effects of the magnetic flux of permanent magnet 9, forms on the magneto-rheological grease that lip 7 twice magneto-rheological greases seal under the lip 13 and magneto-rheological grease.
As shown in Figure 4, in order to solve in reciprocator, the small ripple of travel axis 14 carries magnetic liquid, and the problem that causes the magnetic liquid capacity to reduce is carried out crizzle chromium plating to the surface of travel axis 14 among the present invention and handled.Because the composition in the magneto-rheological grease is mainly by magneto-rheological grease particulate 22 and magneto-rheological grease grease 24, if thereby the microscopic dimensions of the configuration of surface 23 of strict controlled motion axle 14, magneto-rheological grease particulate 22 can not be embedded in the microscopic crack of configuration of surface 23.When travel axis 14 moved back and forth, the magnetorheological rubber 8 of band twice lip was retained in the Seal cage 15 the magneto-rheological grease particulate 22 that is suspended in the magneto-rheological grease with the scraping action with the rubber lip 20 of the magnetorheological rubber 16 of lip.And magneto-rheological grease grease 24 has been embedded in the microscopic crack of configuration of surface 23, and can remain on for a long time in the microscopic crack and the magnetorheological rubber 8 of band twice lip is played lubricated effect with the magnetorheological rubber 16 with lip.
Should be pointed out that the above embodiment can make those skilled in the art more fully understand the invention, but do not limit the present invention in any way creation.Therefore; Although this specification has carried out detailed explanation with reference to accompanying drawing and embodiment to the invention,, those skilled in the art are to be understood that; Still can make amendment or be equal to replacement the invention; In a word, all do not break away from the technological scheme and the improvement thereof of the spirit and the scope of the invention, and it all should be encompassed in the middle of the protection domain of the invention patent.
Claims (8)
1. self-healing seal arrangement; It is characterized in that: said self-healing seal arrangement comprises upper skeleton magnetic pole, lower skeleton magnetic pole, the first magnetorheological rubber, second magnetorheological rubber and the permanent magnet; Said upper skeleton magnetic pole, lower skeleton magnetic pole, the first magnetorheological rubber, the second magnetorheological rubber are ring and coaxial setting, and said permanent magnet is arranged between upper skeleton magnetic pole and the lower skeleton magnetic pole; The said first magnetorheological rubber is arranged on the one side away from said lower skeleton magnetic pole of said upper skeleton magnetic pole; The said second magnetorheological rubber is arranged on the one side away from the upper skeleton magnetic pole of lower skeleton magnetic pole; The inner edge and the travel axis of the said first magnetorheological rubber and the second magnetorheological rubber join; Form Seal cage between said lower skeleton magnetic pole, upper skeleton magnetic pole, permanent magnet, the first magnetorheological rubber, the second magnetorheological rubber and the travel axis, fill magneto-rheological grease in the said Seal cage.
2. a kind of self-healing seal arrangement as claimed in claim 1 is characterized in that: magnetorheological rubber body is filled the slit between upper skeleton magnetic pole and the lower skeleton magnetic pole, and said self-healing seal arrangement is encapsulated.
3. a kind of self-healing seal arrangement as claimed in claim 1; It is characterized in that: the said first magnetorheological rubber is the magnetorheological rubber with one lip; The said second magnetorheological rubber is the magnetorheological rubber of band twice lip, and said lip extends to said travel axis direction by the inner edge of magnetorheological rubber.
4. a kind of self-healing seal arrangement as claimed in claim 3 is characterized in that: on the outer rim of the magnetorheological rubber of said band twice lip a holddown spring is set.
5. like claim 1 or 2 or 3 or 4 described a kind of self-healing seal arrangements, it is characterized in that: the magnetic pole spur of extending to the travel axis direction is set on the inner edge of said lower skeleton magnetic pole and upper skeleton magnetic pole.
6. the reciprocator of the described self-healing seal arrangement of one of a use such as claim 1～5; It is characterized in that: said reciprocator also comprises inner chamber; Wherein said inner chamber is a seal chamber; Said self-healing seal arrangement is arranged on the connection part of said inner chamber and travel axis, and the end with the magnetorheological rubber of one lip in the said self-healing seal arrangement is installed in the said inner chamber outside, and it is inboard that an end of the magnetorheological rubber of band twice lip is installed in said inner chamber; Said travel axis is a magnet case.
7. a kind of reciprocator as claimed in claim 6 is characterized in that: the travel axis surface is carried out MICRO-CRACK CHROMIUM PLATING and is handled.
8. a kind of reciprocator as claimed in claim 7 is characterized in that: the particulate of magneto-rheological grease can not be embedded in the said microscopic crack.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105310059A CN101975278B (en) | 2010-11-04 | 2010-11-04 | Self-healing seal device based on magnetorheological rubber and magnetorheological grease and reciprocating mechanism |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105310059A CN101975278B (en) | 2010-11-04 | 2010-11-04 | Self-healing seal device based on magnetorheological rubber and magnetorheological grease and reciprocating mechanism |
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| Publication Number | Publication Date |
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| CN101975278A CN101975278A (en) | 2011-02-16 |
| CN101975278B true CN101975278B (en) | 2012-12-26 |
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| CN2010105310059A Expired - Fee Related CN101975278B (en) | 2010-11-04 | 2010-11-04 | Self-healing seal device based on magnetorheological rubber and magnetorheological grease and reciprocating mechanism |
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| CN (1) | CN101975278B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024003073A1 (en) * | 2022-06-27 | 2024-01-04 | Inventus Engineering Gmbh | Apparatus having a magnetorheological braking device |
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| CN104482218B (en) * | 2014-12-11 | 2016-08-17 | 重庆大学 | Self-healing seal device based on mangneto deformable rubber |
| CN106041729B (en) * | 2016-06-07 | 2018-07-10 | 广东工业大学 | Magnetorheological plane polishing multi-stage vacuum adsorbent equipment and its processing method |
| CN107631878B (en) * | 2017-10-17 | 2024-01-05 | 苏州苏净船用机械有限公司 | Detection equipment for shaft seal test |
| CN108581677A (en) * | 2018-04-17 | 2018-09-28 | 浙江工贸职业技术学院 | A kind of grinding machine of double abrasive wheel structure |
| CN108612850B (en) * | 2018-05-08 | 2020-07-28 | 清华大学 | Magnetic fluid-lip seal composite seal |
| CN110701096B (en) * | 2019-10-22 | 2020-12-25 | 嘉兴一舟泵阀科技有限公司 | Water pump |
| CN112678304A (en) * | 2020-12-13 | 2021-04-20 | 宜昌华悦光电科技有限公司 | Vacuum packaging equipment for optical lens with failure alarm function |
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| JPS60172776A (en) * | 1984-02-17 | 1985-09-06 | Nippon Fueroo Furuideikusu Kk | Seal device for rotary shaft, utilizing magnetic fluid |
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