CN203670592U - Impact-resisting magneto-rheological buffer - Google Patents
Impact-resisting magneto-rheological buffer Download PDFInfo
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- CN203670592U CN203670592U CN201420001952.0U CN201420001952U CN203670592U CN 203670592 U CN203670592 U CN 203670592U CN 201420001952 U CN201420001952 U CN 201420001952U CN 203670592 U CN203670592 U CN 203670592U
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Abstract
The utility model discloses an impact-resisting magneto-rheological buffer, and the buffer comprises a piston rod and a cylinder barrel. Two ends of the cylinder barrel are respectively provided with a sealing end seat and sealing end cover, thereby forming a sealed cavity. The sealed cavity is filled with magneto-rheological liquid. A concave cavity opening of the piston rod is provided with a piston damping ring which cooperates with the cylinder barrel in a clearance fit manner. The sealed cavity of the cylinder barrel is divided into two independent cavities. The sealing end seat is fixedly connected with a damping rod which extends along an axial direction. The inner side of the piston damping ring is provided with a pole tooth ring which forms, along with the peripheral surface of the damping rod, a magneto-rheological gap. The damping rod is sequentially provided with an initial segment coil group, a top speed segment coil group, and a damping segment coil group. The leading-out wires of all the coil groups are electrically connected with a power system. The buffer provided by the utility model is very suitable for an impact occasion which needs quick response.
Description
Technical field
The utility model relates to buffer field, particularly a kind of shock-resistant magneto-rheological.
Background technique
Buffer is a kind of mechanical device in various industrial field extensive uses, and particularly extensive use in equipment under the high-strength impact environment such as high precision electronic equipment, Aero-Space, armament systems, to reduce the overbump to structure and to suppress mesomerism.Buffer is of great significance the stability and the unfailing performance tool that guarantee system works.
Magneto-rheological is a kind of novel half active controllable buffer take magnetic flow liquid as working medium.Magnetic flow liquid is that a kind of ferromagnetic particle is suspended in a kind of intellectual material in carrying object equably.Rheological properties (viscosity, yield stress) rapidly can occur magnetic flow liquid under magnetic fields changes, and this variation is reversible.Magneto-rheological take magnetic flow liquid as working medium has that power is little, operating temperature range is wide, can realize the advantages such as the real-time continuous control of damping force, therefore in Vehicle damper, structural seismic and various instrument and equipment, all be widely used.
Due to all narrow limitation, common hydraulic bjuffer all exists impact force peak value excessive, there is no platform effect, belongs to passive buffer.And traditional magneto-rheological has adopted using acceleration transducer as feedback signal as closed loop control link, unicoil is imposed to transient current to set up field form, this working method is due to factors such as coil self induction reactance and sensor response times, cause magneto-rheological to exist the problems such as serious hysteresis time response, the impact occasion of response fast of can not satisfying the demand well.
Summary of the invention
The purpose of this utility model is for the deficiencies in the prior art, a kind of shock-resistant magneto-rheological is provided, this shock-resistant magneto-rheological is particularly suitable for requiring the impact occasion of response fast, as being applied in the high-strength impact such as Aero-Space, armament systems environmental area, to reduce the overbump to structure and to suppress mesomerism.
The technical solution of the utility model is: a kind of shock-resistant magneto-rheological, comprise piston rod and cylinder barrel, the two ends of described cylinder barrel are respectively equipped with sealed end seat and end cover, form closed cavity, in this closed cavity, be full of magnetic flow liquid, described piston rod is provided with cavity, in this cavity, be provided with return spring, the cavity mouth of described piston rod is provided with piston damping ring, with cylinder barrel Spielpassung, the closed cavity of cylinder barrel is separated into two separate cavitys, described piston damping is equipped with multiple through holes, for being communicated with the first cavity and second cavity of cylinder barrel, on described sealed end seat, be fixedly connected with a damper rod extending vertically, the extending end of described damper rod stretches in the cavity of piston rod through piston damping ring, be fixedly connected with the guide way in cavity through return spring, to return spring axial limiting, the positioning boss being provided with by piston rod cavity mouth, make the axial motion of piston rod be converted to the elastic force of return spring, described piston damping ring inner side is provided with utmost point ring gear, form magnetorheological gap with the outer circumferential face of damper rod, described damper rod is provided with the initial segment coil groups vertically successively, very fast section of coil groups, decay section coil groups, described the initial segment coil groups, very fast section of coil groups, decay section coil groups is all at least one, described damper rod is provided with extraction channel, the lighting outlet of each coil groups is drawn by the extraction channel of damper rod.
Between each adjacent windings group, magnetic field polarity is identical.
Described the initial segment coil groups, very fast section of coil groups and the section coil groups that decays, more than at least 2 coil of difference serial or parallel connection in its coil groups, and between adjacent windings, magnetic field polarity is contrary.
Described piston rod and piston damping ring are one-body molded, form one section of conical section, in the peripheral wall of this conical section, through hole are set.
Described piston damping ring inner side is provided with two groups of utmost point ring gears, and two groups of utmost point ring gears are arranged side by side vertically.
The fixed end of described damper rod and sealed end seat is spherical; form univesal sphere hinge by hold-down ring and sealed end seat; the extending end of described damper rod and one end of guide way are bolted; the described guide way the other end is hemisphere face; and leave spacing between at the bottom of the cavity of piston rod; forming overshoot protection chamber, is that hemisphere concave surface matches with the hemisphere face of guide way at the bottom of the cavity of described piston rod.
Described piston damping ring, damper rod all adopt ferromagnetic substance to make.
The utility model compared with prior art, its remarkable advantage is: (1) is owing to having adopted multi-coil segmentation preset current controlling method, eliminate the hysteresis quality that sensing system response time brings, make the utility model be particularly suitable for requiring the impact occasion of response fast, as being applied in the high-strength impact such as Aero-Space, armament systems environmental area, to reduce the overbump to structure and to suppress mesomerism.(2) owing to having adopted multi-coil segmentation preset current controlling method, can impact loading process cushion stage by stage, the impact force peak value of having avoided ordinary buffer device to occur, impact power reaches the effect in peak clipping Pinggu, to protect better structural safety.(3) owing to having adopted multi-coil segmentation preset current controlling method, can impact loading process cushion stage by stage, be conducive to shorten buffer displacement.(4) owing to having adopted the multi-coil segmentation preset current can be preset in advance according to load capacity size cases, so the impulsive load of different equivalents is had to certain adaptive feature.(5) owing to adopting the structures such as damping piston ring, damper rod and cylinder barrel, there is no volume compensation structure, reduced whole buffer boundary dimension and reliability.(6) without device or the systems such as the acceleration transducer in traditional magneto-rheological are set, equipment and Software for Design cost have been greatly reduced.
Accompanying drawing explanation
Fig. 1 is the structural representation of shock-resistant magneto-rheological of the present utility model;
Fig. 2 is the structural representation of piston damping ring of the present utility model and piston rod;
Fig. 3 is the structural representation of damper rod of the present utility model;
Fig. 4 is curve image between impact force and the buffer displacement of ordinary buffer device and the curve image between impact force and the buffer displacement of shock-resistant magneto-rheological of the present utility model;
Image between coil groups field current and the buffer displacement of Fig. 5 shock-resistant magneto-rheological of the present utility model.
In accompanying drawing, 1 is cylinder barrel, and 1a is the first cavity, and 1b is the second cavity, 2 is sealed end seat, and 3 is end cover, and 4 is piston rod, and 4a is cavity, 5 is piston damping ring, and 5a is utmost point ring gear, and 5b is through hole, 6 is damper rod, and 7 is return spring, and 8 is guide way, 9 is hold-down ring, and 10 is the initial segment coil groups, and 11 is very fast section of coil groups, 12 is decay section coil groups, and 13 is lighting outlet, and 14 is Sealing.
Embodiment
Referring to Fig. 1 to Fig. 3, a kind of shock-resistant magneto-rheological, comprises piston rod 4 and cylinder barrel 1, and the two ends of described cylinder barrel 1 are respectively equipped with sealed end seat 2 and end cover 3, forms closed cavity, in this closed cavity, is full of magnetic flow liquid.Described sealed end seat 2, end cover 3 weld with the two ends of cylinder barrel 1 respectively.Described sealed end seat 2, end cover 3 are respectively and between cylinder barrel 1, be provided with Sealing 14.Described piston rod 4 is provided with cavity 4a, in this cavity 4a, is provided with return spring 7, and the cavity 4a mouth of described piston rod 4 is provided with piston damping ring 5, with cylinder barrel 1 Spielpassung, the closed cavity of cylinder barrel 1 is separated into two separate cavitys.Between described piston damping ring 5 and cylinder barrel 1, be provided with Sealing.End cover 3 Spielpassung of described piston rod 4 and cylinder barrel 1, seal by Sealing.Described piston damping ring 5 is provided with multiple through hole 5b, for being communicated with the first cavity 1a and the second cavity 1b of cylinder barrel 1.Described piston rod 4 is one-body molded with piston damping ring 5, forms one section of conical section, and through hole 5b is set in the peripheral wall of this conical section.Described through hole 5b is 4～6.On described sealed end seat 2, be fixedly connected with a damper rod 6 extending vertically, the extending end of described damper rod 6 stretches in the cavity 4a of piston rod 4 through piston damping ring 5, be fixedly connected with the guide way 8 in cavity 4a through return spring 7, to return spring 7 axial limitings, the positioning boss being provided with by piston rod 4 cavity 4a mouths, makes the axial motion of piston rod 4 be converted to the elastic force of return spring 7.Described damper rod 6 is spherical with the fixed end of sealed end seat 2, forms univesal sphere hinge by hold-down ring 9 and sealed end seat 2, guarantees that magnetorheological gap remains that surrounding is even in the course of the work.One end of the extending end of described damper rod 6 and guide way 8 is bolted; described guide way 8 the other ends are hemisphere face; and between at the bottom of the cavity 4a of piston rod 4, leaving spacing, form overshoot protection chamber, is that hemisphere concave surface matches with the hemisphere face of guide way 8 at the bottom of the cavity 4a of described piston rod 4.Described piston damping ring 5 inner sides are provided with utmost point ring gear 5a, and the utmost point ring gear 5a of piston damping ring 5 and the outer circumferential face of damper rod 6 form magnetorheological gap.Described piston damping ring 5 inner sides are provided with two groups of utmost point ring gear 5a, and two groups of utmost point ring gear 5a are arranged side by side vertically.Described utmost point ring gear is stepped tooth.Described damper rod 6 is provided with the initial segment coil groups 10, very fast section of coil groups 11, a decay section coil groups 12 vertically successively.Described the initial segment coil groups, very fast section of coil groups, decay section coil groups are all at least one.Each coil groups is inlaid in respectively on damper rod 6, and the outer surface of coil groups and the outer surface of damper rod are flushed.Described the initial segment coil groups 10, very fast section of coil groups 11, decay section coil groups 12 from left to right distribute according to the rule of the impact force of ordinary buffer device and buffer displacement successively.As Fig. 4, according to the rule of the impact force F of ordinary buffer device and buffer displacement S, buffer displacement S is divided into the initial segment S1, very fast section of S2, decay section S3 successively.Described the initial segment S1 accounts for 5 ﹪～10 ﹪ of buffer displacement S, and very fast section of S2 accounts for 15 ﹪～35 ﹪ of buffer displacement S, and decay section S3 accounts for 55 ﹪～80 ﹪ of buffer displacement S.The present embodiment can adopt described the initial segment S1 to account for 10 ﹪ of buffer displacement S, and very fast section of S2 accounts for 35 ﹪ of buffer displacement S, and decay section S3 accounts for 55 ﹪ of buffer displacement S.In the initial segment S1, very fast section of S2, decay section S3, at least one coil groups is set respectively.The coil groups that is arranged in the initial segment is the initial segment coil groups, and the coil groups that is arranged in very fast section is very fast section of coil groups, and the coil groups that is arranged in decay section is decay section coil groups.The number that described the initial segment coil groups 10 is arranged in the initial segment is at least one.Described very fast section of coil groups 11 is arranged in the number of very fast section and is at least one.The number that described decay section coil groups is arranged in decay section is at least one.The number of described the initial segment coil groups 10, very fast section of coil groups 11, decay section coil groups 12 can be determined according to actual needs.The described the initial segment coil groups 10 of the present embodiment is one, and very fast section of coil groups 11 is one, and decay section coil groups 12 is four.Described the initial segment coil groups 10, very fast section of coil groups 11, decay section coil groups 12 respectively correspondence are distributed in the initial segment S1, very fast section of S2, decay section S3, form magnetorheological gap respectively with the utmost point ring gear 5a that moves to the piston damping ring 5 in the initial segment, very fast section, decay section.Between each adjacent windings group, magnetic field polarity is identical.Guarantee to have at least a coil groups magnetic pole to overlap with piston damping ring 5 utmost point ring gear 5a in ballistic motion process, to guarantee the unimpeded of magnetorheological gap magnetic circuit simultaneously.As long as guarantee that the two ratio of the magnetic pole distance of each coil groups and piston damping ring spacing is
be less than 1irrational number, can guarantee to have at least a coil groups magnetic pole to overlap with piston damping ring 5 utmost point ring gear 5a in ballistic motion process, makes magnetorheological gap magnetic circuit unimpeded.The piston damping ring spacing of the present embodiment is the axial spacing of two groups of utmost point ring gear 5a.Described the initial segment coil groups, very fast section of coil groups 11 and the section coil groups 12 that decays, more than at least 2 coil of difference serial or parallel connection in its coil groups, and magnetic field polarity is contrary between adjacent windings, to guarantee forming multiple magnetic pole pieces in coil groups, produce multiple effective magnetorheological gaps.Described piston damping ring 5 adopts ferromagnetic substance to make.Described damper rod 6 all adopts ferromagnetic substance to make.Described piston rod 4, employing ferromagnetic substance are made.Described damper rod 6 is provided with extraction channel, and the lighting outlet 13 of each coil groups is drawn with power-supply system and is electrically connected by the extraction channel of damper rod 6.Described power-supply system is multiple DC electrical source, respectively with the corresponding electrical connection one by one of each coil groups.The quantity of the DC electrical source of described power-supply system is identical with the quantity of coil groups.The DC electrical source of this power-supply system can adopt battery, also can adopt 220V is exchanged to the power regulator that is converted to different VDC.This power-supply system arranges according to actual needs.The control system that this power-supply system matches from traditional magneto-rheological is completely different, has greatly reduced the cost of equipment and Software for Design.This power-supply system can, by energising and the power-off of the each coil groups of manual control mode control, also can adopt energising and the power-off of the each coil groups of automatic control mode control.Automatically the mode of controlling can adopt the existing automatic control mode such as position limit switch, relay.
Referring to Fig. 4 and Fig. 5, adopt the method for the anti-overbump of this shock-resistant magneto-rheological, there are following steps:
1), after the power-supply system of buffer is electrically connected with the initial segment coil groups 10, very fast section of coil groups 11, a decay section coil groups 12 respectively, the power-supply system of buffer is exported respectively field current I1, I2, I3 to the initial segment coil groups, very fast section of coil groups, a decay section coil groups; The field current of each coil groups order is from big to small: the field current I2 of the very fast section of coil groups of excitation electricity I3> of the field current I1> decay section coil groups of the initial segment coil groups.The field current I2 of the field current I1 of the initial segment coil groups, the excitation electricity I3 of decay section coil groups 12, very fast section of coil groups 11 is according to actual conditions setting.The field current I2 of the very fast section of coil groups of the present embodiment is 55 ﹪～70 ﹪ of the field current I1 of the initial segment coil groups.The field current I3 of decay section coil groups is 70 ﹪～85 ﹪ of the field current of the initial segment coil groups.
2) in the time that piston rod 4 is subject to temporary impact to the right, piston damping ring 5 moves axially along the direction of impact force, magnetic flow liquid in the first cavity 1a of extruding cylinder barrel 1, force the magnetic flow liquid in the first cavity 1a of cylinder barrel 1 to flow to the second cavity 1b of cylinder barrel 1, in the time that piston damping ring 5 is positioned at the initial segment, magnetic flow liquid will be subject to the effect in the magnetic field that the initial segment coil groups 10 produces when the first cavity 1a of cylinder barrel 1 flows to the second cavity 1b of cylinder barrel 1 by the magnetorheological gap between piston damping ring 5 and damper rod 6, produce the initial segment damping force, make impact force F increase along precipitous curve, in the time that piston damping ring 5 moves to very fast section, magnetic flow liquid will be subject to the effect in the magnetic field that very fast section of coil groups 11 produce when the first cavity 1a of cylinder barrel 1 flows to the second cavity 1b of cylinder barrel 1 by the magnetorheological gap between piston damping ring 5 and damper rod 6, produce very fast section of damping force, make impact force F along smooth curve transition, avoided occurring impact force peak value, in the time that piston damping ring 5 moves to decay section, magnetic flow liquid will be subject to the effect in the magnetic field that decay section coil groups 12 produces when the first cavity 1a of cylinder barrel 1 flows to the second cavity 1b of cylinder barrel 1 by the magnetorheological gap between piston damping ring 5 and damper rod 6, produce decay section damping force, impact force F is declined along precipitous curve, reduced buffer displacement.Varying in size of the initial segment damping force, very fast section of damping force, decay section damping force, the impact force peak value of having avoided ordinary buffer device to occur.Meanwhile, the elastic force that return spring 7 produces also can produce buffer damping power.
3) after having impacted, each coil groups power-off, piston rod 4 relies on the elastic force of return spring 7 automatically to quickly recover to original position, magnetic flow liquid flows to the first cavity 1a of cylinder barrel 1 rapidly from the second cavity 1b of cylinder barrel 1, until the pressure difference of the second cavity 1b and the first cavity 1a is zero, complete once the buffering of anti-overbump, so repeat, can constantly reduce the overbump to structure and suppress mesomerism.
Referring to Fig. 2, draw through experiment, solid line is the curve image between impact force and the buffer displacement of ordinary buffer device, dotted line is the curve image between impact force and the buffer displacement of shock-resistant magneto-rheological of the present utility model, by contrast, under the temporary impact of same load equivalent, the utility model takes segmentation preset current to control to different coil groups, greatly reduce impact force, avoid occurring impact force peak value, impact force F is after the initial segment rises along precipitous curve, at very fast section of impact force F along the smooth decay section that curves into, decline along precipitous curve, reduce buffer displacement, impact force F is more stable, shock resistance successful improves, guarantee better stability and the reliability of system works, to protect better structural safety.
Claims (7)
1. a shock-resistant magneto-rheological, it is characterized in that: comprise piston rod and cylinder barrel, the two ends of described cylinder barrel are respectively equipped with sealed end seat and end cover, form closed cavity, in this closed cavity, be full of magnetic flow liquid, described piston rod is provided with cavity, in this cavity, be provided with return spring, the cavity mouth of described piston rod is provided with piston damping ring, with cylinder barrel Spielpassung, the closed cavity of cylinder barrel is separated into two separate cavitys, described piston damping is equipped with multiple through holes, for being communicated with the first cavity and second cavity of cylinder barrel, on described sealed end seat, be fixedly connected with a damper rod extending vertically, the extending end of described damper rod stretches in the cavity of piston rod through piston damping ring, be fixedly connected with the guide way in cavity through return spring, to return spring axial limiting, the positioning boss being provided with by piston rod cavity mouth, make the axial motion of piston rod be converted to the elastic force of return spring, described piston damping ring inner side is provided with utmost point ring gear, form magnetorheological gap with the outer circumferential face of damper rod, described damper rod is provided with the initial segment coil groups vertically successively, very fast section of coil groups, decay section coil groups, described the initial segment coil groups, very fast section of coil groups, decay section coil groups is all at least one, described damper rod is provided with extraction channel, the lighting outlet of each coil groups is drawn by the extraction channel of damper rod.
2. shock-resistant magneto-rheological according to claim 1, is characterized in that: between each adjacent windings group, magnetic field polarity is identical.
3. shock-resistant magneto-rheological according to claim 1, it is characterized in that: described the initial segment coil groups, very fast section of coil groups and the section coil groups that decays, more than at least 2 coil of difference serial or parallel connection in its coil groups, and between adjacent windings, magnetic field polarity is contrary.
4. shock-resistant magneto-rheological according to claim 1, is characterized in that: described piston rod and piston damping ring are one-body molded, forms one section of conical section, in the peripheral wall of this conical section, through hole is set.
5. shock-resistant magneto-rheological according to claim 1, is characterized in that: described piston damping ring inner side is provided with two groups of utmost point ring gears, and two groups of utmost point ring gears are arranged side by side vertically.
6. shock-resistant magneto-rheological according to claim 1; it is characterized in that: the fixed end of described damper rod and sealed end seat is spherical; form univesal sphere hinge by hold-down ring and sealed end seat; the extending end of described damper rod and one end of guide way are bolted; the described guide way the other end is hemisphere face; and between at the bottom of the cavity of piston rod, leaving spacing, form overshoot protection chamber, is that hemisphere concave surface matches with the hemisphere face of guide way at the bottom of the cavity of described piston rod.
7. shock-resistant magneto-rheological according to claim 1, is characterized in that: described piston damping ring, damper rod all adopt ferromagnetic substance to make.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420001952.0U CN203670592U (en) | 2014-01-03 | 2014-01-03 | Impact-resisting magneto-rheological buffer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420001952.0U CN203670592U (en) | 2014-01-03 | 2014-01-03 | Impact-resisting magneto-rheological buffer |
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| CN203670592U true CN203670592U (en) | 2014-06-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420001952.0U Expired - Fee Related CN203670592U (en) | 2014-01-03 | 2014-01-03 | Impact-resisting magneto-rheological buffer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104608941A (en) * | 2014-12-10 | 2015-05-13 | 重庆大学 | Magneto-rheological hinge recombination device with angle location and locking functions |
-
2014
- 2014-01-03 CN CN201420001952.0U patent/CN203670592U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104608941A (en) * | 2014-12-10 | 2015-05-13 | 重庆大学 | Magneto-rheological hinge recombination device with angle location and locking functions |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140625 Termination date: 20150103 |
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| EXPY | Termination of patent right or utility model |