CN105715731B - A kind of shear-type magnetorheological fluid damper of two-freedom - Google Patents
A kind of shear-type magnetorheological fluid damper of two-freedom Download PDFInfo
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- CN105715731B CN105715731B CN201610197296.XA CN201610197296A CN105715731B CN 105715731 B CN105715731 B CN 105715731B CN 201610197296 A CN201610197296 A CN 201610197296A CN 105715731 B CN105715731 B CN 105715731B
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- piston
- cylinder barrel
- mounting groove
- cylinder
- ring
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Classifications
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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 kind of shear-type magnetorheological fluid damper of two-freedom, including cylinder body, piston, guide ring, coil, sealing ring and axle jump ring, the cylinder barrel is hollow, is provided with magnetic flow liquid in it；The axis horizontal of the piston is set and it is provided with guide ring annular mounting groove, coils loop mounting groove, sealing ring annular mounting groove and axle jump ring annular mounting groove on the cylinder body, the piston；The coil is arranged at the coils loop mounting groove and fixedly sleeved on the piston.The present invention both can guarantee that the axial movement precision of piston and cylinder barrel, the relative rotating accuracy of piston and cylinder barrel be can guarantee that again, simultaneously because the gyration of piston and cylinder barrel, this prevents the sedimentation of magnetic flow liquid magnetic particle again.
Description
Technical field
The invention belongs to be machined vibration suppression technical field, more particularly, to a kind of the shearing of two-freedom
Magnetic rheological liquid damper.
Background technology
Magnetic rheological liquid damper is the damping continuously adjustabe device manufactured using magnetic rheology effect, and wherein working solution is magnetic current
Become liquid.The suspension that magnetic flow liquid is made up of magnetizable particles, base fluid and additive, when being acted on without externally-applied magnetic field, magnetic current
The magnetizable particles become in liquid are randomly distributed in base fluid, with good mobility；, can when being acted on by externally-applied magnetic field
Magnetized particles will be arranged in chain structure along the magnetic line of force, and it is surrendered shear stress and increased rapidly, is rapidly gone to from fluid state
Class solid state, the size of yield stress is strong and weak relevant with externally-applied magnetic field, after magnetic field is removed, and can reply good rapidly again
Mobility.
Magnetic rheological liquid damper on the market all uses the structure of shearing-valve type, such as Chinese patent at present
CN201210292603.4 discloses a kind of dual-rod magnetorheological fluid damper and seal structure thereof, and it includes cylinder body, end cap, work
Plug, is respectively provided with the Tetrafluoro spacer and copper backing of sealing, if piston and cylinder between cylinder body two ends and the piston rod of piston
Relative rotary motion is produced between body, then can make it that running accuracy cannot be guaranteed, vibrating and shake can be than larger.Therefore, no
It can determine that the vibration for the thin-walled disk-like accessory that the structural damping device is applicable in turnery processing is drawn up.
In addition, on above-mentioned this kind of magnetic rheological liquid damper, piston only between the shaft shoulder of coil both sides and the radial direction of cylinder body
Gap is smaller, and the radial clearance of other positions and cylinder body is than larger, and when such piston is moved axially, magnetic flow liquid is to magnetic flow liquid
Resistance just than larger, therefore, the minimum damping force of this kind of magnetic rheological liquid damper is about 300N, because damping force is too big, difficult
With the damping requirement for the finishing for meeting machining.
The content of the invention
For the disadvantages described above or Improvement requirement of prior art, the invention provides a kind of shearing magnetic current of two-freedom
Liquescent damper, it can guarantee that the relative rotating accuracy of piston and cylinder barrel, simultaneously because the gyration of piston and cylinder barrel, this is again
Prevent the sedimentation of magnetic flow liquid magnetic particle.
To achieve the above object, it is proposed, according to the invention, there is provided a kind of shear-type magnetorheological fluid damper of two-freedom, its
It is characterised by, including cylinder body, piston, guide ring, coil, sealing ring and axle jump ring, wherein,
The cylinder body includes cylinder barrel and two end caps, and the cylinder barrel is hollow, is provided with magnetic flow liquid, described two ends in it
Lid is separately mounted to the left and right ends of the cylinder barrel；
The axis horizontal of the piston is set and it is provided with guide ring annular peace on the cylinder body, the piston
Tankage, coils loop mounting groove, sealing ring annular mounting groove and axle jump ring annular mounting groove；
The quantity of the guide ring is two, and the quantity of the guide ring annular mounting groove mutually should be two, each to be oriented to
Ring is separately mounted at guide ring annular mounting groove and fixedly sleeved on the piston described in one, the outside of each guide ring
Inwall of the wall with the cylinder barrel is contacted, for supporting the piston and cylinder barrel is relatively rotated with piston；In addition, each
The guide ring is made of polytetrafluoroethylene (PTFE)；
The coil is arranged at the coils loop mounting groove and fixedly sleeved on the piston, itself and the cylinder
There is gap between the inwall of cylinder and between two guide rings；
The quantity of the sealing ring is two, and the quantity relative set of the sealing ring annular mounting groove is two, each
Sealing ring be separately mounted to it is at sealing ring annular mounting groove and fixedly sleeved on the piston described in one, each sealing ring
Inwall of the lateral wall with the cylinder barrel is contacted, for sealing the magnetic flow liquid in the cylinder barrel；
The coil and two guide rings are respectively positioned between the two sealing rings；
The quantity of the axle jump ring is two, and the quantity relative set of the axle jump ring annular mounting groove is two,
Each axle be separately mounted to jump ring it is at axle jump ring annular mounting groove and fixedly sleeved on the piston described in one, it is described
Cylinder body, coil, two guide rings and two sealing rings are respectively positioned between the two axle jump rings, and two axle jump rings
Spacing be more than the cylinder body left and right length so that the cylinder body can be moved along left and right directions.
Preferably, each end cap is being provided with annular groove on the side of the cylinder barrel, the cylinder barrel
The left and right sides is provided with annular boss in the position corresponding to the annular groove, and it is recessed that the annular boss stretches into the annular
In groove.
Preferably, pressing plate is provided with the left of the cylinder barrel, for fixed parts to be processed.
Preferably, the right-hand member of the piston is installed with piston fixed seat, for the piston is fixed into lathe
On.
Preferably, there is radial direction spacing in the position that the piston is located in the cylinder barrel, and should with the inner wall of cylinder
The maximum of radial direction spacing is 1.4mm.
Preferably, the maximum damping force of the magnetic rheological liquid damper is 100N.
In general, by the contemplated above technical scheme of the present invention compared with prior art, it can obtain down and show
Beneficial effect：
1) in actual use, cylinder body is directly fixed by pressing plate and workpiece, and piston is fixed with lathe, due in work
Guide ring is added between plug and cylinder barrel, the axial movement precision of piston and cylinder barrel had so both been can guarantee that, piston and cylinder is can guarantee that again
The relative rotating accuracy of cylinder, simultaneously because the gyration of piston and cylinder barrel, this prevents the heavy of magnetic flow liquid magnetic particle again
Drop.
2) annular boss is devised in cylinder barrel rear and front end face, devise annular groove in end cap end face matches somebody with somebody with annular boss
Close, improve the rotating accuracy of damper moving component, still further aspect improves the sealing property of end cap.
3) design of damper stroke is limited with jump ring using two axles outside cylinder body, assembling is easy, convenient adjustment stroke
Size.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.As long as in addition, technical characteristic involved in each embodiment of invention described below
Not constituting conflict each other can just be mutually combined.
Reference picture 1, a kind of shear-type magnetorheological fluid damper of two-freedom, including cylinder body, piston 2, guide ring 8, line
Circle 6, sealing ring 9 and axle jump ring 4, wherein, the cylinder body includes cylinder barrel 7 and two end caps 5, and the cylinder barrel 7 is hollow, sets in it
It is equipped with magnetic flow liquid (being provided with liquid injection hole on cylinder barrel 7, the injection for magnetic flow liquid)；Described two end caps 5 are separately mounted to
The left and right ends of the cylinder barrel 7；The axis horizontal of the piston 2 is set and it (wears through the cylinder body from two end cap 5
Cross), guide ring annular mounting groove, coils loop mounting groove, sealing ring annular mounting groove and axle card are provided with the piston 2
Spring annular mounting groove；The quantity of the guide ring 8 is two, and the quantity of the guide ring annular mounting groove mutually should be two, often
Individual guide ring 8 is separately mounted at guide ring annular mounting groove and fixedly sleeved on the piston 2 described in one, each guiding
Inwall of the lateral wall of ring 8 with the cylinder barrel 7 is contacted, for supporting the piston 2 and enabling cylinder barrel 7 relative with piston 2
Rotate；In addition, each guide ring 8 is made of polytetrafluoroethylene (PTFE)；The coil 6 is installed installed in the coils loop
At groove and fixedly sleeved on the piston 2, there is gap and positioned at two guiding in it between the inwall of the cylinder barrel 7
Between ring 8；The quantity of the sealing ring 9 is two, and the quantity relative set of the sealing ring annular mounting groove is two, each
Sealing ring 9 is separately mounted at sealing ring annular mounting groove and fixedly sleeved on the piston 2 described in one, each sealing ring
Inwall of 9 lateral wall with the cylinder barrel 7 is contacted, for sealing the magnetic flow liquid in the cylinder barrel 7；
Because the guide ring 8 for having polytetrafluoroethylmaterial material is supported between piston 2 and cylinder barrel 7, therefore they have two certainly
By the motion spent, one is linear motion square vertically, and another is the relative gyration of two parts.
The coil 6 and two guide rings 8 are respectively positioned between the two sealing rings 9, and the end of a thread welding of its coil 6 is soft to be led
Line is drawn from the centre bore in piston 2；
The quantity of the axle jump ring 4 is two, and the quantity relative set of the axle jump ring annular mounting groove is two,
Each axle jump ring 4 is separately mounted at axle jump ring annular mounting groove and fixedly sleeved on the piston 2 described in one, institute
Cylinder body, coil 6, two guide rings 8 and two sealing rings 9 are stated to be respectively positioned between the two axle jump rings 4, and two axles
It is more than the left and right length of the cylinder body with the spacing of jump ring 4, so that the cylinder barrel 7 can be moved along left and right directions.Axle jump ring 4
Positioned at the outside of cylinder body, it is used for the stroke for limiting cylinder body, and the adjustment of cylinder body stroke can be by changing axle jump ring annular peace
The position of tankage, and then change installation site of the axle with jump ring 4, or change axle is completed with the thickness of jump ring 4.
Further, each end cap 5 is being provided with annular groove, the cylinder barrel 7 on the side of the cylinder barrel
The left and right sides annular boss is provided with the position corresponding to the annular groove, the annular boss stretches into the annular
In groove.Each end cap 5 is arranged on cylinder barrel 7 by four bolts 10 respectively, passes through the annular groove and cylinder barrel of the end face of end cap 5
The annular boss of 7 end faces coordinates, conllinear come the axle center that ensures them.
Further, pressing plate 11 is provided with the left of the cylinder barrel, for fixed parts to be processed.The front end face of cylinder barrel 7
On be provided with the hole for installing pressing plate 11, the front end face of cylinder body is arranged on by workpiece to be processed endoporus by pressing plate 11, in vibration
In control process, cylinder body can together be rotated with workpiece to be processed, while the damping of an axial direction can be produced to workpiece to be processed
Power.
Further, the right-hand member of the piston 2 is installed with piston fixed seat, for the piston 2 is fixed into machine
On bed.Piston fixed seat includes piston clamped seat 1 and piston clamps branch lid 3, and both are matched for clamping tightly piston 2, and can consolidate
Determine onto lathe.
Further, there is radial direction spacing with the inwall of cylinder barrel 7 in the position that the piston 2 is located in the cylinder barrel 7, and
The maximum of the radial direction spacing is 1.4mm.Such spacing is set, can cause magnetic flow liquid be distributed in piston and cylinder barrel 7 it
Between gap in, piston is when being axially moveable, and it will not be as existing magnetic rheological liquid damper by magnetic flow liquid
Very big resistance, but it is small by the comparison of resistance of magnetic flow liquid, therefore the requirement of finishing can be met.
Further, the maximum damping force of the magnetic rheological liquid damper is 100N.Parts to be processed is carried out on lathe
During finishing, if the damping force as existing magnetic rheological liquid damper is larger, the effect of damping, therefore this magnetic are not reached
It is smaller that the damping force of rheology fluid damper is designed, and can meet the requirement of the finishing of machining.The damping force size
Regulation can be by changing piston and cylinder barrel the parameter such as radial direction spacing, the number of turn of coil adjust.
The present invention adds guide ring 8 in the both sides of coil 6, and its role is to improve the essence that cylinder barrel 7 and piston 2 are relatively rotated
Degree, can also improve the precision of the axial movement of cylinder barrel 7, be relatively rotated due to existing between cylinder barrel 7 and piston 2, this again improves magnetic
The stability of magnetic particle in rheology liquid.Annular groove and convex annular have been separately designed in the end face of end cap 5 and the end face of cylinder barrel 7
Platform, this aspect improves the axiality of magnetic rheological liquid damper, on the other hand improves the sealing property of end.The present invention is adopted
With shearing structure (maximum damping force 100N or so), simple in construction, compact, easy to loading and unloading, stroke is conveniently adjusted, with respect to mesh
The structure (minimum damping force 300N or so) of preceding shearing-valve type on the market, the damping force of generation is smaller, can meet workpiece finishing
During small damping force requirement.
In situation about not being powered to coil 6, magnetic rheological liquid damper and common hydraulic damper working method and
Principle is the same；After being powered to coil 6, the damping force size of magnetic rheological liquid damper can change with the size of electric current in coil 6
Become and change, the process is continuous reversible.
The assembling process of the present invention is as follows：
Coil 6 on the piston 2 first, softer wire is welded in line end, the hollow position of wire from piston 2 is worn
Go out, 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 pacified
On cylinder barrel 7, piston 2 is fitted into cylinder barrel 7 after completing above-mentioned installation；Last installation axle jump ring 4, and will by syringe
Magnetic flow liquid is circulated into cylinder barrel 7 from liquid injection hole on cylinder barrel 7, and liquid injection hole then is blocked into sealing again.
As it will be easily appreciated by one skilled in the art that the foregoing is only presently preferred embodiments of the present invention, it is not used to
The limitation present invention, any modification, equivalent and the improvement made within the spirit and principles of the invention etc., it all should include
Within protection scope of the present invention.
Claims (6)
1. a kind of shear-type magnetorheological fluid damper of two-freedom, it is characterised in that including cylinder body, piston, guide ring, line
Circle, sealing ring and axle jump ring, wherein,
The cylinder body includes cylinder barrel and two end caps, and the cylinder barrel is hollow, is provided with magnetic flow liquid, described two end caps point in it
Not An Zhuan the cylinder barrel left and right ends；
The axis horizontal of the piston is set and it is provided with guide ring annular installation on the cylinder body, the piston
Groove, coils loop mounting groove, sealing ring annular mounting groove and axle jump ring annular mounting groove；
The quantity of the guide ring is two, and the quantity of the guide ring annular mounting groove mutually should be two, each guide ring point
An Zhuan not be at guide ring annular mounting groove and fixedly sleeved on the piston described in one, the lateral wall of each guide ring is equal
Contacted with the inwall of the cylinder barrel, for supporting the piston and cylinder barrel is relatively rotated with piston；In addition, each described
Guide ring is made of polytetrafluoroethylene (PTFE)；
The coil is arranged at the coils loop mounting groove and fixedly sleeved on the piston, itself and the cylinder barrel
There is gap between inwall and between two guide rings；
The quantity of the sealing ring is two, and the quantity relative set of the sealing ring annular mounting groove is two, each sealing
Circle is separately mounted at sealing ring annular mounting groove and fixedly sleeved on the piston described in one, the outside of each sealing ring
Inwall of the wall with the cylinder barrel is contacted, for sealing the magnetic flow liquid in the cylinder barrel；
The coil and two guide rings are respectively positioned between the two sealing rings；
The quantity of the axle jump ring is two, and the quantity relative set of the axle jump ring annular mounting groove is two, each
Axle is separately mounted at axle jump ring annular mounting groove and fixedly sleeved on the piston described in one, the cylinder with jump ring
Body, coil, two guide rings and two sealing rings are respectively positioned between the two axle jump rings, and two axle jump rings
Spacing is more than the left and right length of the cylinder body, so that the cylinder body can be moved along left and right directions.
2. a kind of shear-type magnetorheological fluid damper of two-freedom according to claim 1, it is characterised in that Mei Gesuo
State end cap and be provided with annular groove on the side of the cylinder barrel, the left and right sides of the cylinder barrel is corresponding to the ring
The position of connected in star is provided with annular boss, and the annular boss is stretched into the annular groove.
3. a kind of shear-type magnetorheological fluid damper of two-freedom according to claim 1, it is characterised in that the cylinder
The left side of cylinder is provided with pressing plate, for fixed parts to be processed.
4. a kind of shear-type magnetorheological fluid damper of two-freedom according to claim 1, it is characterised in that the work
The right-hand member of plug is installed with piston fixed seat, for the piston is fixed on lathe.
5. a kind of shear-type magnetorheological fluid damper of two-freedom according to claim 1, it is characterised in that the work
There is radial direction spacing in the position that plug is located in the cylinder barrel, and the maximum of the radial direction spacing is with the inner wall of cylinder
1.4mm。
6. a kind of shear-type magnetorheological fluid damper of two-freedom according to claim 1, it is characterised in that the magnetic
The maximum damping force of rheology fluid 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 |
Applications Claiming Priority (1)
| 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 CN105715731A (en) | 2016-06-29 |
| CN105715731B true CN105715731B (en) | 2017-07-18 |
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| 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 |
| CN112963489B (en) * | 2021-04-07 | 2022-08-16 | 重庆大学 | Multi-channel multi-degree-of-freedom magnetorheological damper based on porous composite material |
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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 |
| CN101776151B (en) * | 2010-03-08 | 2011-08-03 | 北京交通大学 | Reciprocating shaft magnetic liquid sealing structure |
| CN102182785A (en) * | 2011-03-18 | 2011-09-14 | 谭晓婧 | Magnetic steel piston type magneto-rheological damper with double ejection rods |
| CN102788110B (en) * | 2012-08-17 | 2015-03-04 | 上海应用技术学院 | Seal structure of dual-rod magnetorheological fluid damper |
| CN204805404U (en) * | 2015-03-26 | 2015-11-25 | 六盘水师范学院 | Magnetorheological suspensions gas -liquid buffer |
| CN105003585B (en) * | 2015-06-12 | 2017-03-01 | 重庆材料研究院有限公司 | Variable cross-section piston magneto-rheological vibroshock |
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