CN105715731A - Two-freedom-degree shearing type magnetorheological fluid damper - Google Patents
Two-freedom-degree shearing type magnetorheological fluid damper Download PDFInfo
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- CN105715731A CN105715731A CN201610197296.XA CN201610197296A CN105715731A CN 105715731 A CN105715731 A CN 105715731A CN 201610197296 A CN201610197296 A CN 201610197296A CN 105715731 A CN105715731 A CN 105715731A
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- piston
- cylinder barrel
- mounting groove
- magnetorheological fluid
- ring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/36—Special sealings, including sealings or guides for piston-rods
- F16F9/368—Sealings in pistons
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/53—Means for adjusting damping characteristics by varying fluid viscosity, e.g. electromagnetically
- F16F9/535—Magnetorheological [MR] fluid dampers
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Fluid-Damping Devices (AREA)
Abstract
The invention discloses a two-freedom-degree shearing type magnetorheological fluid damper. The two-freedom-degree shearing type magnetorheological fluid damper comprises a cylinder body, a piston, a guiding ring, a coil, a sealing ring and a snap spring for a shaft; a cylinder barrel is hollow and internally provided with magnetorheological fluid; the axis of the piston is horizontally arranged and penetrates the cylinder body; the piston is provided with an annular installing groove for the guiding ring, an annular installing groove for the coil, an annular installing groove for the sealing ring and an annular installing groove for the snap spring for the shaft. The coil is installed in the annular installing groove for the coil and fixedly connected to the piston in a sleeving manner. The two-freedom-degree shearing type magnetorheological fluid damper can guarantee the axial movement precision of the piston and the cylinder barrel and can also guarantee the relative rotation precision of the piston and the cylinder barrel, and meanwhile because of the rotational motion of the piston and the cylinder barrel, sedimentation of magnetic particles of the magnetorheological fluid is prevented.
Description
Technical field
The invention belongs to machining vibration suppression technical field, more particularly, to the shear-type magnetorheological fluid damper of a kind of two-freedom.
Background technology
Magnetic rheological liquid damper is the damping continuously adjustabe device utilizing magnetic rheology effect to manufacture, and wherein working solution is magnetic flow liquid.The suspension that magnetic flow liquid is made up of magnetizable particles, base fluid and additive, when without externally-applied magnetic field effect, the magnetizable particles in magnetic flow liquid is randomly distributed in base fluid, has good mobility；When being subject to externally-applied magnetic field effect, magnetizable particles will be arranged in chain structure along the magnetic line of force, its surrender shear stress increases rapidly, class solid state is rapidly gone to from fluid state, the size of yield stress is relevant with the power of externally-applied magnetic field, after magnetic field removes, good mobility can be replied rapidly again.
Magnetic rheological liquid damper on the market all adopts the structure of shearing-valve type at present, as Chinese patent CN201210292603.4 discloses a kind of double; two rod magnetic rheological liquid damper and seals structure, it includes cylinder body, end cap, piston, Tetrafluoro spacer and the copper backing of sealing it is respectively provided with between cylinder body two ends and the piston rod of piston, if producing relative rotary motion between piston and cylinder body, running accuracy then can be made to can not be guaranteed, and vibration and shake can be relatively larger.It is thus impossible to determine that the vibration of thin-walled disk-like accessory that this structural damping device is applicable in turnery processing is drawn up.
Additionally, above-mentioned this kind of magnetic rheological liquid damper, on piston only less at the shaft shoulder of coil both sides and the radial clearance of cylinder body, other position is relatively larger with the radial clearance of cylinder body, and when such piston moves axially, magnetic flow liquid is just relatively larger to the resistance of magnetic flow liquid, therefore, the minimum damping force of this kind of magnetic rheological liquid damper is about 300N, owing to damping force is too big, it is difficult to meet the accurately machined damping requirement of machining.
Summary of the invention
Disadvantages described above or Improvement requirement for prior art, the invention provides the shear-type magnetorheological fluid damper of a kind of two-freedom, it can guarantee that the relative rotating accuracy of piston and cylinder barrel, simultaneously because the gyration of piston and cylinder barrel, this prevents again the sedimentation of magnetic flow liquid magnetic particle.
For achieving the above object, it is proposed, according to the invention, provide the shear-type magnetorheological fluid damper of a kind of two-freedom, it is characterised in that include cylinder body, piston, guide ring, coil, sealing ring and axle jump ring, wherein,
Described cylinder body includes cylinder barrel and two end caps, described cylinder barrel hollow, is provided with magnetic flow liquid in it, and said two end cap is separately mounted to the two ends, left and right of described cylinder barrel；
The axis horizontal of described piston is arranged and it runs through described cylinder body, and described piston is provided with guide ring annular mounting groove, coils loop mounting groove, sealing ring annular mounting groove and axle jump ring annular mounting groove；
The quantity of described guide ring is two, the quantity of described guide ring annular mounting groove should be two mutually, each guide ring is separately mounted to guide ring annular mounting groove place described in one and fixedly sleeved on described piston, the lateral wall of each guide ring all with the contact internal walls of described cylinder barrel, for supporting described piston and making cylinder barrel and piston to relatively rotate；Additionally, each described guide ring all adopts politef to make；
Described coil is arranged on described coils loop mounting groove place and fixedly sleeved on described piston, there is gap and between itself and the inwall of described cylinder barrel between two guide rings；
The quantity of described sealing ring is two, the quantity relative set of described sealing ring annular mounting groove is two, each sealing ring is separately mounted to sealing ring annular mounting groove place described in one and fixedly sleeved on described piston, the lateral wall of each sealing ring all with the contact internal walls of described cylinder barrel, for the magnetic flow liquid sealed in described cylinder barrel；
Described coil and two guide rings are respectively positioned between the two sealing ring；
The quantity of described axle jump ring is two, the quantity relative set of described axle jump ring annular mounting groove is two, each axle jump ring is separately mounted to axle jump ring annular mounting groove place described in one and fixedly sleeved on described piston, described cylinder body, coil, two guide rings and two sealing rings are respectively positioned between the two axle jump ring, and the spacing of two described axle jump rings is more than the left and right length of described cylinder body, so that described cylinder body can move along left and right directions.
Preferably, each described end cap is being provided with annular groove on the side of described cylinder barrel, and the left and right sides of described cylinder barrel is provided with annular boss in the position corresponding to described annular groove, and described annular boss stretches in described annular groove.
Preferably, the left side of described cylinder barrel is provided with pressing plate, for fixing part to be processed.
Preferably, the right-hand member of described piston is installed with the fixing seat of piston, is fixed on lathe for by described piston.
Preferably, described piston is positioned at the position of described cylinder barrel and there is radial spacing with described inner wall of cylinder, and the maximum of this radial spacing is 1.4mm.
Preferably, the maximum damping force of described magnetic rheological liquid damper is 100N.
In general, by the contemplated above technical scheme of the present invention compared with prior art, it is possible to obtain following beneficial effect:
1) in actual use, cylinder body is directly fixed by pressing plate and workpiece, piston and lathe are fixed, owing to adding guide ring between piston and cylinder barrel, so both can guarantee that the axially-movable precision of piston and cylinder barrel, can guarantee that again the relative rotating accuracy of piston and cylinder barrel, simultaneously because the gyration of piston and cylinder barrel, this prevents again the sedimentation of magnetic flow liquid magnetic particle.
2) devising annular boss in face, cylinder barrel rear and front end, devise annular groove at end cap end face and coordinate with annular boss, improve the rotating accuracy of antivibrator moving component, still further aspect improves the sealing property of end cap.
3) adopting the design of two axle jump ring restriction antivibrator strokes outside cylinder body, assembling easily, conveniently adjusts the size of stroke.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention.
Detailed description of the invention
In order to make the purpose of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein is only in order to explain the present invention, is not intended to limit the present invention.As long as just can be mutually combined additionally, technical characteristic involved in each embodiment of invention described below does not constitute conflict each other.
With reference to Fig. 1, a kind of shear-type magnetorheological fluid damper of two-freedom, including cylinder body, piston 2, guide ring 8, coil 6, sealing ring 9 and axle jump ring 4, wherein, described cylinder body includes cylinder barrel 7 and two end caps 5, described cylinder barrel 7 hollow, is provided with magnetic flow liquid (having liquid injection hole on cylinder barrel 7, for the injection of magnetic flow liquid) in it；Said two end cap 5 is separately mounted to the two ends, left and right of described cylinder barrel 7；The axis horizontal of described piston 2 is arranged and it runs through described cylinder body (two end cap 5 traverse), and described piston 2 is provided with guide ring annular mounting groove, coils loop mounting groove, sealing ring annular mounting groove and axle jump ring annular mounting groove；The quantity of described guide ring 8 is two, the quantity of described guide ring annular mounting groove should be two mutually, each guide ring 8 is separately mounted to guide ring annular mounting groove place described in one and fixedly sleeved on described piston 2, the lateral wall of each guide ring 8 all with the contact internal walls of described cylinder barrel 7, for supporting described piston 2 and making cylinder barrel 7 and piston 2 to relatively rotate；Additionally, each described guide ring 8 all adopts politef to make；Described coil 6 is arranged on described coils loop mounting groove place and fixedly sleeved on described piston 2, there is gap and between itself and the inwall of described cylinder barrel 7 between two guide rings 8；The quantity of described sealing ring 9 is two, the quantity relative set of described sealing ring annular mounting groove is two, each sealing ring 9 is separately mounted to sealing ring annular mounting groove place described in one and fixedly sleeved on described piston 2, the lateral wall of each sealing ring 9 all with the contact internal walls of described cylinder barrel 7, for the magnetic flow liquid sealed in described cylinder barrel 7；
Between piston 2 and cylinder barrel 7, the guide ring 8 with polytetrafluoroethylmaterial material supports, therefore they exist two degree of freedom motion, one be vertically side rectilinear motion, another one is the relative gyration of two parts.
Described coil 6 and two guide rings 8 are respectively positioned between the two sealing ring 9, and the end of a thread welding flexible circuit conductor of its coil 6 is drawn from the centre bore in piston 2；
The quantity of described axle jump ring 4 is two, the quantity relative set of described axle jump ring annular mounting groove is two, each axle jump ring 4 is separately mounted to axle jump ring annular mounting groove place described in one and fixedly sleeved on described piston 2, described cylinder body, 6, two guide rings 8 of coil and two sealing rings 9 are respectively positioned between the two axle jump ring 4, and the spacing of two described axle jump rings 4 is more than the left and right length of described cylinder body, so that described cylinder barrel 7 can move along left and right directions.Axle jump ring 4 is positioned at the outside of cylinder body, its stroke being used for limiting cylinder body, and the adjustment of cylinder body stroke can pass through to change the position of axle jump ring annular mounting groove, and then changes the axle installation site of jump ring 4, or the gauge changing axle jump ring 4 completes.
Further, each described end cap 5 is being provided with annular groove on the side of described cylinder barrel, and the left and right sides of described cylinder barrel 7 is provided with annular boss in the position corresponding to described annular groove, and described annular boss stretches in described annular groove.Each end cap 5 is arranged on cylinder barrel 7 respectively through four bolts 10, is coordinated by the annular boss of the annular groove of end cap 5 end face and cylinder barrel 7 end face, guarantees their axle center conllinear.
Further, the left side of described cylinder barrel is provided with pressing plate 11, for fixing part to be processed.The front end face of cylinder barrel 7 has the hole installing pressing plate 11, by pressing plate 11, the front end face of cylinder body is arranged on by workpiece to be processed endoporus, in vibration control process, cylinder body can rotate together along with workpiece to be processed, and workpiece to be processed can produce an axial damping force simultaneously.
Further, the right-hand member of described piston 2 is installed with the fixing seat of piston, is fixed on lathe for by described piston 2.The fixing seat of piston includes piston clamped seat 1 and piston clamping lid 3, and both are matched for clamping tightly piston 2, and can be fixed on lathe.
Further, described piston 2 is positioned at the position of described cylinder barrel 7 and there is radial spacing with described cylinder barrel 7 inwall, and the maximum of this radial spacing is 1.4mm.Such spacing is arranged, can so that magnetic flow liquid be distributed in the gap between piston and cylinder barrel 7, piston is when being axially moveable, it will not be subject to the very big resistance of magnetic flow liquid as existing magnetic rheological liquid damper, and the comparison of resistance that is affected by magnetic flow liquid is little, accurately machined requirement therefore can be met.
Further, the maximum damping force of described magnetic rheological liquid damper is 100N.When part to be processed is carried out polish by lathe, if damping force is bigger as existing magnetic rheological liquid damper, then not reaching the effect of damping, therefore the damping force design of this magnetic rheological liquid damper is smaller, can meet the accurately machined requirement of machining.The adjustment of this damping force size can regulate by changing the parameters such as the number of turn of piston and the radial spacing of cylinder barrel, coil.
The present invention adds guide ring 8 in coil 6 both sides, its role is to improve cylinder barrel 7 and piston 2 precision in relative rotation, also can improve the precision of cylinder barrel 7 axially-movable, relatively rotate owing to existing between cylinder barrel 7 and piston 2, this again improves the stability of magnetic particle in magnetic flow liquid.Having separately designed annular groove and annular boss at end cap 5 end face and cylinder barrel 7 end face, this improves the axiality of magnetic rheological liquid damper on the one hand, improves the sealing property of end on the other hand.The present invention adopts shearing structure (maximum damping force about 100N), simple in construction, compact, easy to loading and unloading, stroke are conveniently adjusted, the structure (minimum about damping force 300N) of relatively current shearing-valve type on the market, the damping force produced is less, can meet the requirement of little damping force in workpiece finishing passes.
When not giving the situation of coil 6 energising, magnetic rheological liquid damper is the same with principle with common hydraulic damper working method；When to coil 6 be energized after, the damping force size of magnetic rheological liquid damper can along with in coil 6 electric current size change and change, this process is continuous reversible.
The assembling process of the present invention is as follows:
First coiling on the piston 26, at the wire that line end welding is softer, passed from the hollow position of piston 2 by wire, coil 6 is coated AB glue and is fixed and encapsulation process after winding；Then guide ring 8 and sealing ring 9 are installed, then end cap 5 is arranged on cylinder barrel 7, after completing above-mentioned installation, piston 2 is loaded in cylinder barrel 7；Axle jump ring 4 is finally installed, and by syringe, magnetic flow liquid is circulated in cylinder barrel 7 from liquid injection hole cylinder barrel 7, then again liquid injection hole is blocked sealing.
Those skilled in the art will readily understand; the foregoing is only presently preferred embodiments of the present invention; not in order to limit the present invention, all any amendment, equivalent replacement and improvement etc. made within the spirit and principles in the present invention, should be included within protection scope of the present invention.
Claims (6)
1. the shear-type magnetorheological fluid damper of a two-freedom, it is characterised in that include cylinder body, piston, guide ring, coil, sealing ring and axle jump ring, wherein,
Described cylinder body includes cylinder barrel and two end caps, described cylinder barrel hollow, is provided with magnetic flow liquid in it, and said two end cap is separately mounted to the two ends, left and right of described cylinder barrel；
The axis horizontal of described piston is arranged and it runs through described cylinder body, and described piston is provided with guide ring annular mounting groove, coils loop mounting groove, sealing ring annular mounting groove and axle jump ring annular mounting groove；
The quantity of described guide ring is two, the quantity of described guide ring annular mounting groove should be two mutually, each guide ring is separately mounted to guide ring annular mounting groove place described in one and fixedly sleeved on described piston, the lateral wall of each guide ring all with the contact internal walls of described cylinder barrel, for supporting described piston and making cylinder barrel and piston to relatively rotate；Additionally, each described guide ring all adopts politef to make；
Described coil is arranged on described coils loop mounting groove place and fixedly sleeved on described piston, there is gap and between itself and the inwall of described cylinder barrel between two guide rings；
The quantity of described sealing ring is two, the quantity relative set of described sealing ring annular mounting groove is two, each sealing ring is separately mounted to sealing ring annular mounting groove place described in one and fixedly sleeved on described piston, the lateral wall of each sealing ring all with the contact internal walls of described cylinder barrel, for the magnetic flow liquid sealed in described cylinder barrel；
Described coil and two guide rings are respectively positioned between the two sealing ring；
The quantity of described axle jump ring is two, the quantity relative set of described axle jump ring annular mounting groove is two, each axle jump ring is separately mounted to axle jump ring annular mounting groove place described in one and fixedly sleeved on described piston, described cylinder body, coil, two guide rings and two sealing rings are respectively positioned between the two axle jump ring, and the spacing of two described axle jump rings is more than the left and right length of described cylinder body, so that described cylinder body can move along left and right directions.
2. the shear-type magnetorheological fluid damper of a kind of two-freedom according to claim 1, it is characterized in that, each described end cap is being provided with annular groove on the side of described cylinder barrel, the left and right sides of described cylinder barrel is provided with annular boss in the position corresponding to described annular groove, and described annular boss stretches in described annular groove.
3. the shear-type magnetorheological fluid damper of a kind of two-freedom according to claim 1, it is characterised in that the left side of described cylinder barrel is provided with pressing plate, for fixing part to be processed.
4. the shear-type magnetorheological fluid damper of a kind of two-freedom according to claim 1, it is characterised in that the right-hand member of described piston is installed with the fixing seat of piston, is fixed on lathe for by described piston.
5. the shear-type magnetorheological fluid damper of a kind of two-freedom according to claim 1, it is characterised in that described piston is positioned at the position of described cylinder barrel and there is radial spacing with described inner wall of cylinder, and the maximum of this radial spacing is 1.4mm.
6. the shear-type magnetorheological fluid damper of a kind of two-freedom according to claim 1, it is characterised in that the maximum damping force of described magnetic rheological liquid damper is 100N.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610197296.XA CN105715731B (en) | 2016-03-31 | 2016-03-31 | A kind of shear-type magnetorheological fluid damper of two-freedom |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610197296.XA CN105715731B (en) | 2016-03-31 | 2016-03-31 | A kind of shear-type magnetorheological fluid damper of two-freedom |
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| Publication Number | Publication Date |
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| CN105715731A true CN105715731A (en) | 2016-06-29 |
| CN105715731B CN105715731B (en) | 2017-07-18 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112496780A (en) * | 2020-10-12 | 2021-03-16 | 重庆文理学院 | Direct-drive rotary table of five-axis numerical control machine tool |
| CN112963489A (en) * | 2021-04-07 | 2021-06-15 | 重庆大学 | Multi-channel multi-degree-of-freedom magnetorheological damper based on porous composite material |
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| US20110215532A1 (en) * | 2010-03-08 | 2011-09-08 | Beijing Jiaotong University | Ferrofluid sealing apparatus for a reciprocating shaft |
| CN102182785A (en) * | 2011-03-18 | 2011-09-14 | 谭晓婧 | Magnetic steel piston type magneto-rheological damper with double ejection rods |
| JP4976862B2 (en) * | 2007-01-22 | 2012-07-18 | カヤバ工業株式会社 | Magnetorheological fluid shock absorber manufacturing method |
| CN102788110A (en) * | 2012-08-17 | 2012-11-21 | 上海应用技术学院 | Dual-rod magnetorheological fluid damper and seal structure thereof |
| CN105003585A (en) * | 2015-06-12 | 2015-10-28 | 重庆材料研究院有限公司 | Variable-section piston type magnetorheological vibration reducer |
| CN204805404U (en) * | 2015-03-26 | 2015-11-25 | 六盘水师范学院 | Magnetorheological suspensions gas -liquid buffer |
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2016
- 2016-03-31 CN CN201610197296.XA patent/CN105715731B/en not_active Expired - Fee Related
Patent Citations (6)
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| JP4976862B2 (en) * | 2007-01-22 | 2012-07-18 | カヤバ工業株式会社 | Magnetorheological fluid shock absorber manufacturing method |
| US20110215532A1 (en) * | 2010-03-08 | 2011-09-08 | Beijing Jiaotong University | Ferrofluid sealing apparatus for a reciprocating shaft |
| CN102182785A (en) * | 2011-03-18 | 2011-09-14 | 谭晓婧 | Magnetic steel piston type magneto-rheological damper with double ejection rods |
| CN102788110A (en) * | 2012-08-17 | 2012-11-21 | 上海应用技术学院 | Dual-rod magnetorheological fluid damper and seal structure thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112496780A (en) * | 2020-10-12 | 2021-03-16 | 重庆文理学院 | Direct-drive rotary table of five-axis numerical control machine tool |
| CN112963489A (en) * | 2021-04-07 | 2021-06-15 | 重庆大学 | Multi-channel multi-degree-of-freedom magnetorheological damper based on porous composite material |
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| CN105715731B (en) | 2017-07-18 |
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Granted publication date: 20170718 Termination date: 20180331 |