CN103423365A - Membrane type magneto-rheological damper and system - Google Patents
Membrane type magneto-rheological damper and system Download PDFInfo
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- CN103423365A CN103423365A CN2013103488652A CN201310348865A CN103423365A CN 103423365 A CN103423365 A CN 103423365A CN 2013103488652 A CN2013103488652 A CN 2013103488652A CN 201310348865 A CN201310348865 A CN 201310348865A CN 103423365 A CN103423365 A CN 103423365A
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Abstract
The invention discloses a membrane type magneto-rheological damper and system. The damper comprises a cylinder body and a damping assembly, wherein the damping assembly comprises damping plates and damping membranes, the damping plates are located in the cylinder body and arranged in parallel in the axial direction of the cylinder body, each damping membrane is located around each damping plate and connected between each damping plate and the cylinder body in a sealed mode, a damping cavity is commonly defined by the damping plates, the damping membranes and the cylinder body, and magneto-rheological media are filled into the damping cavity. The damping membranes are made of flexible materials or/and elastic materials, and the damping assembly is provided with a damping rod which extends out of the cylinder body in the axial direction of the cylinder body. The damper further comprises an electromagnet used for controlling the magneto-rheological media, and a control circuit of the electromagnet. The membrane type magneto-rheological damper and system are light in weight and small in inertia, the pulling-back action of the membranes is used and combined with the flexible deformation of the magneto-rheological media in joints of the damping membranes and the damping plates, the coefficient of the flexible deformation is adjustable, therefore, the damping assembly can flexibly react to high-frequency and small-amplitude vibration, the membrane type magneto-rheological damper and system are suitable for detection, production and operation places with high requirements for accuracy, and detection accuracy and operation stability are ensured.
Description
Technical field
The present invention relates to a kind of magnetorheological damping equipment, particularly a kind of MR damper machine system that can guarantee that surveying instrument is not disturbed by extraneous high frequency small amplitude motion.
Background technique
MR damper is a kind of intelligent vibration damping device, existing bar-type magneto-rheological damper adopts piston and housing structure more, piston wherein mostly is the cylindrical consisted of magnetic conductive metal, and adjust the damping force of its output by the viscosity of magnetorheological medium in changing between piston and cylinder body, the MR damper that this class adopts the cylindrical piston structure because of the quality of piston the gap between large and piston and cylinder body less, there is larger motional inertia and be difficult to be applicable to the damping vibration attenuation demand of the vibration occasion of the little amplitude of high frequency; Particularly for high-precision surveying instrument etc., the occasion higher concerning required precision, need to eliminate the interference that dither causes it, otherwise can affect its testing result and running state.
Therefore, need a kind of damper of carrying out effective damping of the vibration to the little amplitude of high frequency that can be pointed, be applicable to the detection higher to required precision, production run occasion, guarantee testing precision and traveling comfort.
Summary of the invention
In view of this, purpose of the present invention provides a kind of membrane type MR damper and system, effective damping is carried out in the vibration to the little amplitude of high frequency that can be pointed, is applicable to the detection higher to required precision, production run occasion, guarantees testing precision and traveling comfort.
Membrane type MR damper of the present invention, comprise cylinder body and the damper assembly that is positioned at cylinder body, described damper assembly comprises in cylinder body along Boring mill to the damping plate be set up in parallel and be sealedly attached to the damped diaphragm between damping plate and cylinder body around damping plate, jointly surround damping cavity between described damping plate, damped diaphragm and cylinder body, fill magnetorheological medium in described damping cavity; Described damped diaphragm is flexibility or/and elastic material is made; Described damper assembly is provided with along Boring mill and also at least at axial restraint, connects the damper rod of damping plate to stretching out cylinder body;
Damper also comprises electromagnet and the control circuit thereof for controlling magnetorheological medium.
Further, described cylinder body two ends vertically is fixed with respectively end cap, and described damper rod stretches out end cap vertically and the end cap that stretches out with it is slidably matched;
Further, described damper assembly also comprises the damping compensation air bag, and described damper rod is one and stretches out one of them end cap of cylinder body; Described damping compensation air bag is pressed between another end cap and the damping plate adjacent with this end cap of cylinder body;
Further, described electromagnet be fixed in cylinder body around, described cylinder body and end cap thereof, damping plate and damper rod are made by the non-magnetic material;
Further, described damping plate and damped diaphragm are two, and the axial spacing between two damping plates is less than 1/2nd of damped diaphragm external diameter;
Further, described damped diaphragm by flexibility or/and the elasticity macromolecular material make;
Further, be provided with self-lubricating plain bearing between described damper rod and its end cap stretched out.
The invention also discloses a kind of damped system of utilizing the anti-external interference of membrane type MR damper assurance device, comprising:
The membrane type MR damper, for passing through the steady support device of damper rod;
Infrastructure device, for settling the membrane type MR damper.
Further, also comprise:
The vibration parameters pick-up transducers, for gathering the vibration parameters of infrastructure device;
Central processing unit (CPU), send control command for the vibration parameters that receives the vibration parameters pick-up transducers and according to dry vibration parameters numerical value to the control circuit of electromagnet, for regulating the working state of magnetorheological medium;
Further, the membrane type MR damper is four formation to the making of surveying instrument, and described device comprises detecting instrument or running gear.
Beneficial effect of the present invention: membrane type MR damper of the present invention and system, employing is by damping plate, " piston " structure that damped diaphragm surrounds, total quality is lighter, inertia is less, utilize the effect of pulling back the change of scratching in damped diaphragm and damping plate junction in conjunction with magnetorheological medium of diaphragm, and the coefficient of scratching change is adjustable, make damper assembly of the present invention there is reaction flexibly for the high frequency small amplitude motion, effective damping is carried out in the vibration to the little amplitude of high frequency that can be pointed, be applicable to the detection higher to required precision, the production run occasion, guarantee testing precision and traveling comfort.
The accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described.
Fig. 1 is structural representation of the present invention;
Fig. 2 is damped system structural representation of the present invention.
Embodiment
Fig. 1 is structural representation of the present invention, Fig. 2 is damped system structural representation of the present invention, as shown in the figure: the membrane type MR damper of the present embodiment, comprise cylinder body 4 and the damper assembly that is positioned at cylinder body 4, described damper assembly comprises and is sealedly attached to the damped diaphragm between damping plate and cylinder body at the interior damping plate axially be set up in parallel along cylinder body 48 of cylinder body 4 with around damping plate 8, jointly surround damping cavity between described damping plate, damped diaphragm and cylinder body 4, fill magnetorheological medium 9 in described damping cavity; Described damped diaphragm is flexibility or/and elastic material is made; Described damper assembly is provided with along cylinder body 4 and axially stretches out cylinder body 4 and at least at axial restraint, connect the damper rod 1 of damping plate, that is to say, damper rod 1 can be fixedly connected with vertically with arbitrary damping plate, certainly, also can be fixedly connected with arbitrary damping plate wherein; Described damper rod 1 is generally used for and connects the equipment higher to required precision, to reduce the impact of vibration on equipment;
Damper also comprises electromagnet 10 and the control circuit 12 thereof for controlling magnetorheological medium.
The general cylindrical structural that adopts of cylinder body 4, be easy to the maintenance in manufacture and later stage; Due to magnetorheological medium between damped diaphragm and damping plate in can scratch vertically change may, utilize this to scratch and become and, in conjunction with the effect of pullling of damped diaphragm, can vibrate to external world and make the reaction of damping flexibly; Damped diaphragm and damping plate and inboard wall of cylinder block form a fixed connection and seal, and this is fixedly connected with any mechanical connection manner that can adopt prior art, comprise that bonding, flange add to hold connection etc., all can realize goal of the invention.
In the present embodiment, described cylinder body 4 two ends vertically is fixed with respectively end cap (upper end cap 3 shown in figure and lower end cap 5), and described damper rod 1 stretches out end cap vertically and the end cap that stretches out with it is slidably matched; There is integrity preferably.
In the present embodiment, described damper assembly also comprises damping compensation air bag 6, is marked with gas in air bag; Described damper rod 1 is one and stretches out one of them end cap (in figure for upper end cap 3) of cylinder body 4; Described damping compensation air bag 6 is pressed between another end cap (lower end cap 5) and the damping plate 8 adjacent with this end cap of cylinder body 4; Compensate damping action by air bag, prevent due to damper assembly under larger frequency vibration due to inertia cause inharmonious, and there is buffering for greater impact power; Certainly, compensation air bag 6 is not set and still can realizes goal of the invention, just for greater impact, can't realize buffering, can not guarantee preferably damping.
As shown in the figure, damper rod 1 is fixedly connected with vertically and passes whole damping plates (as shown being two) and is fixedly connected with compensation air bag 6, makes the present invention have integrity, standard preferably; Damper rod 1 coaxially arranges with damping plate and cylinder body, does not repeat them here.
In the present embodiment, described electromagnet 10 be fixed in cylinder body 4 around, described cylinder body 4 and end cap thereof (upper end cap 3 and lower end cap 5), damping plate 8(damping plate are all used same reference character) and damper rod 1 by the non-magnetic material, make; Simple and compact for structure, integrity is strong, has higher working efficiency.
In the present embodiment, described damping plate 8(damping plate is all used same reference character) and damped diaphragm 7(damped diaphragm all use same reference character) be two, the axial spacing between two damping plates 8 is less than 1/2nd of damped diaphragm 7 external diameters; Formation is similar to the thin slice piston structure, not only reduces inertia, can also increase the vibration frequency under equal conditions, further improves the damping to dither.
In the present embodiment, described damped diaphragm 7 by flexibility or/and the elasticity macromolecular material make; There is higher intensity and sealing preferably, guarantee the smooth and easy operation of long period of the present invention.
In the present embodiment, between described damper rod 1 and its end cap stretched out, be provided with self-lubricating plain bearing 2, there is self lubricity, guarantee that the to-and-fro motion of damper rod is comparatively smooth and easy, increase work efficiency, further increase damping.
In the present invention, vibration source is fixed on the vertical direction of damper rod 1, when vibration source generation high frequency small amplitude motion, damper rod just can drive two damped diaphragms 7 and moves up and down fast in cylinder body: when electromagnet 10 is not switched on, do not have electromagnetic field to pass through the magnetorheological medium 9 in cylinder body 4, therefore, the viscosity of the magnetorheological medium 9 between two damped diaphragms 7 on damper rod 1 is low being in a liquid state, when vibration source drives two damped diaphragms 7 cylinder body 1 is interior while moving up and down fast by damper rod 1, radial outside because of dotted line in the magnetorheological medium 9(Fig. 1 between two damped diaphragms 7) be the liquid state that viscosity is lower, liquid magnetorheological medium can the space between two damped diaphragms in free-flow and damping force when two damped diaphragms are moved up and down fast is less, after external electromagnet energising by the electromagnetic field produced, this electromagnetic field makes the viscosity of the magnetorheological medium in cylinder body higher, when vibration source drives two damped diaphragms and moves up and down fast in cylinder body by damper rod, because the higher semisolid (or class is solid-state) that is of viscosity of the magnetorheological medium between two damped diaphragms on damper rod now is difficult to free-flow in the space between two damped diaphragms, like this, the magnetorheological medium that two damped diaphragms that move up and down fast will drive between two damped diaphragms produces mass motion and has formed " semisolid piston ", should " semisolid piston ", with the magnetorheological medium of peripheral (that is: in the ring damping membrane), relative " friction " motion will occur, thereby damping force when two damped diaphragms are moved up and down fast in cylinder body is higher, adjustment enters the size of current of external electromagnet, can regulate the viscosity of magnetorheological medium in cylinder body, thereby the damping force of membrane type MR damper is adjusted.
The invention also discloses a kind of damped system of utilizing the anti-external interference of membrane type MR damper assurance device, as shown in the figure: comprising:
Membrane type MR damper 15, for passing through the steady support device of damper rod;
Infrastructure device generally comprises inspection vehicle, monitor station, work car, worktable etc.
In the present embodiment, also comprise:
Vibration parameters pick-up transducers 16, for gathering the vibration parameters of infrastructure device 14;
Central processing unit (CPU) 17, send control command for the vibration parameters that receives the vibration parameters pick-up transducers and according to dry vibration parameters numerical value to the control circuit of electromagnet, for regulating the working state of magnetorheological medium; Adjust the magnetic intensity of electromagnet according to the Vibration Condition of infrastructure device, can be pointed carry out damping.
In the present embodiment, the membrane type MR damper is four formation to the making of surveying instrument, and described device comprises detecting instrument or running gear; Form comparatively stable support.
As shown in the figure: the damper rod of four membrane type MR damper is fixedly supported to the bottom of precision type instrument 13, and the bottom of cylinder body 4 and infrastructure device 14 are fixing, and electromagnet 10 is connected with control power supply 12 by connecting line 11; To produce dither when infrastructure device 14 operation, dither will affect the measuring accuracy of precision type instrument 13, by adjusting (can by central processing unit (CPU) or according to the fixedly vibration of equipment and manual tune) control circuit 12 is to the size of electromagnet 10 output currents, can regulate the viscosity of the interior magnetorheological medium 9 of cylinder body 4, adjust damping force of the present invention, thereby make to be placed in the vibration that the precision type instrument 13 on infrastructure device 14 is subject to, obtain effective damping.
Finally explanation is, above embodiment is only unrestricted in order to technological scheme of the present invention to be described, although with reference to preferred embodiment, the present invention is had been described in detail, those of ordinary skill in the art is to be understood that, can modify or be equal to replacement technological scheme of the present invention, and not breaking away from aim and the scope of technical solution of the present invention, it all should be encompassed in the middle of claim scope of the present invention.
Claims (10)
1. a membrane type MR damper, it is characterized in that: comprise cylinder body and the damper assembly that is positioned at cylinder body, described damper assembly comprises in cylinder body along Boring mill to the damping plate be set up in parallel and be sealedly attached to the damped diaphragm between damping plate and cylinder body around damping plate, jointly surround damping cavity between described damping plate, damped diaphragm and cylinder body, fill magnetorheological medium in described damping cavity; Described damped diaphragm is flexibility or/and elastic material is made; Described damper assembly is provided with along Boring mill to the damper rod that stretches out cylinder body;
Damper also comprises electromagnet and the control circuit thereof for controlling magnetorheological medium.
2. membrane type MR damper according to claim 1, it is characterized in that: described cylinder body two ends vertically is fixed with respectively end cap, and described damper rod stretches out end cap vertically and the end cap that stretches out with it is slidably matched.
3. membrane type MR damper according to claim 2, it is characterized in that: described damper assembly also comprises the damping compensation air bag, described damper rod is one and stretches out one of them end cap of cylinder body; Described damping compensation air bag is pressed between another end cap and the damping plate adjacent with this end cap of cylinder body.
4. membrane type MR damper according to claim 3 is characterized in that: described electromagnet be fixed in cylinder body around, described cylinder body and end cap thereof, damping plate and damper rod are made by the non-magnetic material.
5. membrane type MR damper according to claim 4 is characterized in that: described damped diaphragm by flexibility or/and the elasticity macromolecular material make.
6. membrane type MR damper according to claim 5, it is characterized in that: described damping plate and damped diaphragm are two, and the axial spacing between two damping plates is less than 1/2nd of damped diaphragm external diameter.
7. membrane type MR damper according to claim 6, is characterized in that: between described damper rod and its end cap stretched out, be provided with self-lubricating plain bearing.
8. a damped system of utilizing the anti-external interference of the arbitrary claim of claim 1 to 7 described membrane type MR damper assurance device is characterized in that: comprising:
The membrane type MR damper, for passing through the steady support device of damper rod;
Infrastructure device, for settling the membrane type MR damper.
9. damped system according to claim 8 is characterized in that: also comprise:
The vibration parameters pick-up transducers, for gathering the vibration parameters of infrastructure device;
Central processing unit (CPU), send control command for the vibration parameters that receives the vibration parameters pick-up transducers and according to dry vibration parameters numerical value to the control circuit of electromagnet, for regulating the working state of magnetorheological medium.
10. damped system according to claim 9 is characterized in that: the membrane type MR damper is four formation to the making of surveying instrument, and described device comprises detecting instrument or running gear.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310348865.2A CN103423365B (en) | 2013-08-12 | 2013-08-12 | Membrane type magneto-rheological damper and system |
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| CN201310348865.2A CN103423365B (en) | 2013-08-12 | 2013-08-12 | Membrane type magneto-rheological damper and system |
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| CN103423365B CN103423365B (en) | 2016-01-20 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104034455A (en) * | 2014-07-01 | 2014-09-10 | 重庆材料研究院有限公司 | Pressure sensor based on magnetorheological materials |
| CN105780958A (en) * | 2016-02-15 | 2016-07-20 | 沈阳建筑大学 | STF and MRF combination type anti-shock vibration attenuation energy dissipation damper |
| CN106222987A (en) * | 2016-08-25 | 2016-12-14 | 常州纳捷机电科技有限公司 | Shock-absorbing type template cutter |
| CN106678257A (en) * | 2017-01-24 | 2017-05-17 | 东南大学 | Volume compensation isolation type single rod magneto-rheological damper |
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| CN202851794U (en) * | 2012-09-20 | 2013-04-03 | 谭晓婧 | Single-output rod annular air bag vertical-type absorber |
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| JPH07190128A (en) * | 1993-12-28 | 1995-07-28 | Bridgestone Corp | Vibration control damper |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104034455A (en) * | 2014-07-01 | 2014-09-10 | 重庆材料研究院有限公司 | Pressure sensor based on magnetorheological materials |
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| CN105780958A (en) * | 2016-02-15 | 2016-07-20 | 沈阳建筑大学 | STF and MRF combination type anti-shock vibration attenuation energy dissipation damper |
| CN106222987A (en) * | 2016-08-25 | 2016-12-14 | 常州纳捷机电科技有限公司 | Shock-absorbing type template cutter |
| CN106678257A (en) * | 2017-01-24 | 2017-05-17 | 东南大学 | Volume compensation isolation type single rod magneto-rheological damper |
| CN106678257B (en) * | 2017-01-24 | 2018-07-06 | 东南大学 | A kind of volume compensation is isolated singly to go out pole magnetorheological damper |
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| CN103423365B (en) | 2016-01-20 |
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