CN101319698A - Damp-controllable magneto-rheological damper - Google Patents

Damp-controllable magneto-rheological damper Download PDF

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Publication number
CN101319698A
CN101319698A CNA2008100201429A CN200810020142A CN101319698A CN 101319698 A CN101319698 A CN 101319698A CN A2008100201429 A CNA2008100201429 A CN A2008100201429A CN 200810020142 A CN200810020142 A CN 200810020142A CN 101319698 A CN101319698 A CN 101319698A
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CN
China
Prior art keywords
piston
damper
damp
discoideus
communicated
Prior art date
Application number
CNA2008100201429A
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Chinese (zh)
Inventor
龚兴龙
郭朝阳
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中国科学技术大学
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Application filed by 中国科学技术大学 filed Critical 中国科学技术大学
Priority to CNA2008100201429A priority Critical patent/CN101319698A/en
Publication of CN101319698A publication Critical patent/CN101319698A/en

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Abstract

The invention relates to a damping adjustable magneto-rheological damper. The damper is capable of settling the problems that the area of the damping channel of existing magneto-rheological dampers is small, and the produced damping force is weak. A magneto-rheological fluid channel is added in the piston, namely, more than two disk-shape cavities are arranged at the middle part inside the piston in a parallel manner; a damping channel is arranged on the piston in axial direction; the middle part of the top of the disk-shape cavity is communicated with the damping channel, and the upper end of the damping channel is communicated with an outlet, and the outlet is arranged on the piston rod in an axial direction and communicated with an upper working space; the middle part of the lower disc-shape cavity bottom is communicated with an inlet channel. A connecting tube is arranged between more than two disc-shape cavities respectively for intercommunication. The damping force of the damper has a wide range of variation; the magnetic field strength is taken full advantage of; the chain area of the magneto-rheological fluid is increased; and the variation scope of the damping force of the damper is increased. The outlet and the inlet adopt different designs, different compression and return damping forces can be produced to meet different requirements; an extra spring can bear the static load and has damping function.

Description

The MR damper of damp-controllable
Technical field
The present invention relates to a kind of damper that utilizes magnetic converting technique.
Background technique
In recent decades, utilize the controllable damper development of magnetorheological or electro-rheological technology more and more rapider, magnetorheological or electro-rheological fluid damper is more and more wider in the application in vibration control field, its controlled damping performance is in Vehicle Engineering, space flight and aviation, civil engineering, sports equipment etc. have important effect.
The proportion additive seldom in total component that the main composition of magnetic flow liquid is divided into soft magnetic particles, mother liquor and adds in order to prevent the magnetic-particle sedimentation.Its essential characteristic is can change semisolid into from free fluid at moment (Millisecond) under the effect of outside magnetic field, present controlled yield strength, and this variation is reversible.MR damper is utilized the rheological properties of magnetic flow liquid, on damper, be provided with the damp channel in magnetic field, when damper piston and cylinder body generation relative movement, then can push the magnetic flow liquid in the cylinder body, it be flow through, from damp channel when not having the action of a magnetic field in the damp channel, magnetic flow liquid is a viscous fluid, if damp channel is applied magnetic field, sclerosis takes place the magnetic flow liquid in the damp channel becomes visco-plastic body, causes the damping force of piston motion to increase.Regulate magnetic intensity and can change the yield strength of magnetic flow liquid, thereby regulate the size of the damping force of damper.
The MR damper that invention is at present used, no matter be shearing, extruding type still be the valve formula, the damp channel of magnetic flow liquid mainly contain electromagnetic coil inside and between electromagnetic coil and cylinder body two kinds of forms.Patent CN1187205C, CN2525303Y etc., damp channel require the damp channel diameter as far as possible little between electromagnetic coil and cylinder body, could obtain bigger damping force, but the more little then manufacture cost of the diameter of damp channel is just high more.The damp channel of damper is necessary for ferromagnetic substance and makes, otherwise the magnetic circuit of damp channel can not be closed, and damper just can not be worked.U. S. Patent Pat.6019201 etc., damp channel is in electromagnetic coil inside, but magnetic direction can not keep vertical with the flow direction of magnetic flow liquid.Can produce maximum damping force when the flow direction of magnetic flow liquid is vertical with magnetic direction.U. S. Patent Pat.6510929B1 has guaranteed the vertical of magnetic flow liquid and magnetic direction, but inner magnetic flow liquid chaining area is less, can not produce big damping force.
Summary of the invention:
Little at existing MR damper damp channel area, produce the deficiency of the little technology of damping force, the object of the present invention is to provide and a kind ofly allow large-area magnetic flow liquid chaining, produce big damping force and in Piston Compression and recuperation, produce different damping power, satisfy the MR damper of the damp-controllable of different vibration damping requirements.
The technical solution that realizes above-mentioned purpose is as follows:
The MR damper of damp-controllable comprises hydraulic cylinder 3, be provided with piston 6 in the hydraulic cylinder 3, piston 6 is connecting piston rod 2, be provided with electromagnetic coil 10 in the piston 6 interlayer sidewalls, the hydraulic cylinder inside of piston rod 2 one sides is last active chamber 5, and the hydraulic cylinder of piston opposite side is inner to be following active chamber 7.
The middle part is provided with parallel discoideus cavity more than two in the piston 6 corresponding with electromagnetic coil 10, and two discoideus cavitys are all perpendicular to piston rod 2; Piston rod 2 axially middle part is provided with damp channel 13, the discoideus cavity crown center that is positioned at the top is being communicated with damp channel 13, damp channel 13 upper ends are being communicated with and are exporting 14, outlet 14 is positioned at piston rod radially, and be communicated with and going up active chamber 5, the discoideus cavity bottom intermediate connection that is positioned at the below inlet passage 15, and the another port of inlet passage 15 is positioned at active chamber 7 down; Be communicated with by the connection siphunculus more than four 11 respectively between the discoideus cavity corresponding surface more than two;
Be provided with mobile piston 18 and inner spring 19 successively in the hydraulic cylinder of described active chamber 7 bottoms down;
Hydraulic cylinder 3 outer cover are provided with spring 20.
Describedly be positioned at the outlet 14 that piston rod directly makes progress and be radial cross outlet.
Describedly connect the circumferential edges that siphunculus 11 is distributed in discoideus cavity more than four.
The skirt section of described mobile piston 18 is provided with above together seal ring 17.
The overhanging end of described piston rod 2 is provided with circular baffle plate 21, and active chamber 7 lower ends are provided with circular fixedly connected 9 under the hydraulic cylinder, is set in spring 20 on the hydraulic cylinder 3 between baffle plate 21 and fixedly connected 9.
Plural discoideus cavity in the said structure, inlet passage 15, the connecting passage 11 with the piston rod line parallel, damp channel 13 and radial outlet 14 constitute the magnetic flow liquid passage.
As shown in Figure 5, two tabular area of space that magnetic rheology effect mainly occurs in the magnetic flow liquid passage are discoideus cavity 12 in upper strata and following discoideus cavity 16, the one-level magnetic rheology effect occurs in discoideus cavity 12 zones, and the magnetic rheology effect of secondary occurs in down discoideus cavity 16 zones.Dash area is the magnetorheological fluid damp passage, magnetic direction just with one-level under discoideus cavity 12 and the secondary flow direction of the magnetic flow liquid in the discoideus cavity 16 vertical, and flow direction is also vertical with magnetic field in inlet passage 15 and the damp channel 13, has increased the generation area of magnetic rheology effect greatly.When piston motion, the magnetic flow liquid in the extruding active chamber is by damp channel, and under the effect of externally-applied magnetic field, the yield strength of magnetic flow liquid increases, and the pressure reduction at piston two ends is increased and the damping force increase.The spring 20 that adds can bear static load and damping effect is arranged, and prevents the inefficacy of MR damper.Also can not add outer spring 20, only rely on the damping force work of the damp channel generation of piston.The design of radial outlet 14 and connecting passage 11 as Fig. 3, shown in 4, even under the situation of no externally-applied magnetic field and spring 20, also can produce certain damping force, prevents that damper lost efficacy.And the different designs of inlet passage 15 and radial outlet 14 allows to produce different compressions and replys damping force, can meet specific requirement, and has increased the flexibility of damper.Damper of the present invention can comprise one or more clutch release slave cylinders, and its inner piston can also be taked multistage form, and the outer electromagnetic coil that twines of piston also can adopt multistage form, and the dull and stereotyped space of the magnetic flow liquid passage of internal piston also can increase to a plurality of by two.
The present invention has the advantage of several respects compared with prior art:
1, the damping force excursion of damper of the present invention is big: the design by the upper and lower discoideus cavity of internal piston, made full use of magnetic intensity, and increased the chaining zone of magnetic flow liquid, increased the excursion of damper controllable damping force;
2, flexible design, applied widely: the different designs of channel outlet part and inlet part, can produce different compressions and reply damping force, can satisfy different requirements;
3, structural stability, energy consumption reduces, and low cost of manufacture can be used Nonferromugnetic material, or even plastics.
4, have automatic protection functions, the spring that hydraulic cylinder is outside sheathed, damper works in the time of can preventing the magnetic flow liquid inefficacy.
Description of drawings
Fig. 1 is a structural representation of the present invention,
Fig. 2 is the partial enlarged drawing of hydraulic cylinder and piston,
Fig. 3 is the A-A sectional view of Fig. 2,
Fig. 4 is the B-B sectional view of Fig. 2,
Fig. 5 is a damping magnetic flow liquid damp channel enlarged view.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further described by embodiment.
Embodiment:
Referring to Fig. 1, the MR damper of damp-controllable comprises hydraulic cylinder 3, be provided with plunger 6 in the hydraulic cylinder 3, piston 6 is connecting piston rod 2, piston 6 is divided into two parts with the hydraulic cylinder 3 of damper: go up active chamber (answer chamber) 5 and following active chamber (compression chamber) 7, adorn an amount of magnetic flow liquid in the active chamber.Be provided with electromagnetic coil 10 in the piston 6 interlayer sidewalls, electromagnetic coil 10 is connected on the outside power supply by two leads 4, changes the size of MR damper damping force by the size of control foreign current.
By Fig. 2, Fig. 3 and Fig. 4 as seen, the middle part is provided with parallel last discoideus cavity 12 and discoideus cavity 16 down in the piston 6 corresponding with electromagnetic coil 10, and goes up discoideus cavity 12 and following discoideus cavity 16 all perpendicular to piston rod 2; Piston rod 2 axially middle part is provided with damp channel 13, go up discoideus cavity 12 crown centers and be communicated with damp channel 13, damp channel 13 upper ends are being communicated with and are exporting 14, outlet 14 is positioned at piston rod radially, and be communicated with and going up active chamber 5, discoideus cavity 16 bottom intermediate connections inlet passage 15 down, and the another port of inlet passage 15 is positioned at active chamber 7 down; Go up discoideus cavity 12 and connect siphunculus 11 connections by six respectively between discoideus cavity 16 corresponding surfaces down, six connect the circumferential edges that siphunculus 11 are distributed in discoideus cavity.
Go up discoideus cavity 12, following discoideus cavity 16, inlet passage 15, connecting passage 11, damp channel 13 and radial outlet 14 and constitute the magnetic flow liquid passages with the piston rod line parallel.
The damping force of magnetic flow liquid produces in the magnetic flow liquid passage, as shown in Figure 5.Piston 6 is reciprocating in active chamber, the extruding magnetic flow liquid is by the magnetic flow liquid passage, magnetic flow liquid is by under discoideus cavity 12 and the secondary on the one-level during discoideus cavity 16, the direction of externally-applied magnetic field is vertical with the flow direction of liquid just, magnetic flow liquid adheres to chaining, hinders the mobile generation damping force of magnetic flow liquid, and big area of space guarantees the generation of large-area magnetic flow liquid effect, the magnetic induction intensity of electromagnetic coil inside is also maximum, has all guaranteed the generation of big controllable damping force.The design of magnetic circuit and damp channel can guarantee that damper uses ferromagnetism or Nonferromugnetic material, or even plastics, has reduced the requirement of material.
The radial cross of damper exports 14 parts as shown in Figure 3, and outlet 14 is radially dispersed from the piston rod center, and the number of outlet can be according to different requirement designs.Connecting passage 11 as shown in Figure 4, connecting passage 11 distributes vertically, the edge near piston of should trying one's best, number also can design as required.The design of export and import different geometrical size and number can produce different compressions and reply damping force, satisfies the requirement of certain damping force needs.Under the situation that adds field failure and no outer spring, by different designs, can produce certain damping force to exit portion and inlet part, prevent damper total failure, guarantee certain damping effect.
Be provided with mobile piston 18 and inner spring 19 successively in the hydraulic cylinder of following active chamber 7 bottoms; Bottom active chamber 7 is moved piston 18 with compensated cavity 8 and separates, two seals circle 17 is equipped with in the skirt section of mobile piston 18, prevent that the magnetic flow liquid in the active chamber from the time flowing in the compensated cavity in work, compensated cavity 8 is the volumes that enter active chamber during for 2 compressions of compensating piston bar.Inner spring 19 in the compensated cavity can support mobile piston 18, and inner spring 19 can not installed yet, inner dress pressurized gas.Seal ring should be installed in piston rod and cylinder body contacting point, prevents the leakage of magnetic flow liquid.
Hydraulic cylinder 3 outer cover are equipped with spring 20.Be installed with circular baffle plate 21 on the overhanging end of piston rod 2, following active chamber 7 lower ends of hydraulic cylinder are equipped with circular fixedly connected 9, be sleeved on spring 20 on the hydraulic cylinder 3 between baffle plate 21 and fixedly connected 9, can carry static load and damping effect is arranged, guarantee the proper functioning of MR damper.Flexible jumper 1 fixedly connected the overhanging end of piston rod 2, flexible jumper 1 is rotary, connects on external devices by it, fixed connector 9 can be fixed together with external equipment.

Claims (6)

1, the MR damper of damp-controllable, comprise hydraulic cylinder (3), be provided with piston (6) in the hydraulic cylinder (3), piston (6) is connecting piston rod (2), be provided with electromagnetic coil (10) in piston (6) the interlayer sidewall, the hydraulic cylinder inside of piston rod (2) one sides is last active chamber (5), and the hydraulic cylinder of piston opposite side is inner to be following active chamber (7), it is characterized in that:
The middle part is provided with parallel discoideus cavity more than two in the piston (6) corresponding with electromagnetic coil (10), and two discoideus cavitys are all perpendicular to piston rod (2); Piston rod (2) axially middle part is provided with damp channel (13), the discoideus cavity crown center that is positioned at the top is being communicated with damp channel (13), damp channel (13) upper end is being communicated with outlet (14), outlet (14) is positioned at piston rod radially, and be communicated with and going up active chamber (5), the discoideus cavity bottom intermediate connection that is positioned at the below inlet passage (15), and the another port of inlet passage (15) is positioned at active chamber (7) down; Be communicated with by connecting siphunculus (11) more than four respectively between the discoideus cavity corresponding surface more than two;
Be provided with mobile piston (18) and inner spring (19) successively in the hydraulic cylinder of described active chamber (7) bottom down;
Hydraulic cylinder (3) outer cover is provided with spring (20).
2, the MR damper of damp-controllable according to claim 1, it is characterized in that: the middle part is provided with parallel last discoideus cavity (12) and discoideus cavity (16) down in the piston (6) corresponding with electromagnetic coil (10), and upward discoideus cavity (12) and following discoideus cavity (16) all perpendicular to piston rod (2); Go up discoideus cavity (12) crown center and be communicated with damp channel (13), discoideus cavity (16) bottom intermediate connection inlet passage (15) down, goes up discoideus cavity (12) and connect siphunculus (11) by six respectively between discoideus cavity (16) corresponding surface down to be communicated with.
3, the MR damper of damp-controllable according to claim 1 is characterized in that: describedly be positioned at the outlet (14) that piston rod directly makes progress and be radial cross outlet.
4, the MR damper of damp-controllable according to claim 1 is characterized in that: describedly connect the circumferential edges that siphunculus (11) is distributed in discoideus cavity more than four.
5, the MR damper of damp-controllable according to claim 1 is characterized in that: the skirt section of described mobile piston (18) is provided with above together seal ring (17).
6, the MR damper of damp-controllable according to claim 1, it is characterized in that: the overhanging end of described piston rod (2) is provided with circular baffle plate (21), following active chamber (7) lower end of hydraulic cylinder is provided with circular fixedly connected (9), and the spring (20) that is set on the hydraulic cylinder (3) is positioned between baffle plate (21) and fixedly connected (9).
CNA2008100201429A 2008-03-27 2008-03-27 Damp-controllable magneto-rheological damper CN101319698A (en)

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Application Number Priority Date Filing Date Title
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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102162499A (en) * 2011-03-04 2011-08-24 海尔集团公司 Variable damping shock absorber and drum washing machine using shock absorber
CN102588497A (en) * 2011-12-12 2012-07-18 山东大学 Electromagnetism and magnetorheological fluid mixed shock absorber
CN102582543A (en) * 2012-02-19 2012-07-18 重庆大学 Archimedes spiral channel based controllable magneto-rheological grease buffer
CN102889332A (en) * 2012-10-25 2013-01-23 株洲时代新材料科技股份有限公司 Magnetorheological damper for automotive suspension
CN103148157A (en) * 2012-07-19 2013-06-12 吉林大学 Multistage extrusion-type magneto-rheological damper
CN103174789A (en) * 2013-04-03 2013-06-26 山东理工大学 Designing method of magneto-rheological absorber damping channel width based on characteristic requirements
CN108331877A (en) * 2018-01-22 2018-07-27 哈尔滨工程大学 Shear-type magnetorheological fluid damper based on quadrupole magnetic core Yu foam metal liner
CN109532590A (en) * 2018-12-06 2019-03-29 深圳朗昇贸易有限公司 A kind of safety chair seats of car
CN109551474A (en) * 2018-11-20 2019-04-02 福州大学 A kind of robot list leg hydraulic actuator based on the control of magnetorheological dynamic rate

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102162499A (en) * 2011-03-04 2011-08-24 海尔集团公司 Variable damping shock absorber and drum washing machine using shock absorber
CN102162499B (en) * 2011-03-04 2016-03-30 海尔集团公司 A kind of damping changing impact damper and use the roller washing machine of this vibration damper
CN102588497A (en) * 2011-12-12 2012-07-18 山东大学 Electromagnetism and magnetorheological fluid mixed shock absorber
CN102582543A (en) * 2012-02-19 2012-07-18 重庆大学 Archimedes spiral channel based controllable magneto-rheological grease buffer
CN103148157A (en) * 2012-07-19 2013-06-12 吉林大学 Multistage extrusion-type magneto-rheological damper
CN103148157B (en) * 2012-07-19 2016-05-18 吉林大学 Multistage squash type MR damper
CN102889332A (en) * 2012-10-25 2013-01-23 株洲时代新材料科技股份有限公司 Magnetorheological damper for automotive suspension
CN102889332B (en) * 2012-10-25 2015-08-05 株洲时代新材料科技股份有限公司 A kind of magnetorheological damper for automotive suspension
CN103174789A (en) * 2013-04-03 2013-06-26 山东理工大学 Designing method of magneto-rheological absorber damping channel width based on characteristic requirements
CN108331877A (en) * 2018-01-22 2018-07-27 哈尔滨工程大学 Shear-type magnetorheological fluid damper based on quadrupole magnetic core Yu foam metal liner
CN109551474A (en) * 2018-11-20 2019-04-02 福州大学 A kind of robot list leg hydraulic actuator based on the control of magnetorheological dynamic rate
CN109532590A (en) * 2018-12-06 2019-03-29 深圳朗昇贸易有限公司 A kind of safety chair seats of car

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