CN207554682U - Built-in range sensor carries out the integrated-type MR damper of displacement detecting - Google Patents
Built-in range sensor carries out the integrated-type MR damper of displacement detecting Download PDFInfo
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- CN207554682U CN207554682U CN201721736459.3U CN201721736459U CN207554682U CN 207554682 U CN207554682 U CN 207554682U CN 201721736459 U CN201721736459 U CN 201721736459U CN 207554682 U CN207554682 U CN 207554682U
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- end cap
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Abstract
The utility model discloses the integrated-type MR dampers that a kind of built-in range sensor carries out displacement detecting, are mainly made of piston rod, dust cover, capacitive distance sensor I, capacitive distance sensor II, damper cylinder barrel, piston head, magnet exciting coil and end cap etc..Capacitive distance sensor I is placed in capacitive distance sensor II in dust cover, and is rigidly connected with damper left end cap.During external vibration, with damper cylinder barrel relative motion occurs for dust cover, and the radial clearance between dust cover outer inclined-plane and two capacitive distance sensors changes, so as to generate the proportional output signal corresponding to piston head displacement.The electric current of magnet exciting coil is adjusted according to obtained piston head displacement information, so as to achieve the purpose that optimal damping effect, improve damping effect and energy saving.The utility model is compact-sized, small, high sensitivity, antipollution and strong antijamming capability, in the semi-active control aystem severe especially suitable for working environment.
Description
Technical field
The utility model is related to a kind of MR dampers more particularly to a kind of built-in range sensor to carry out displacement detecting
Integrated-type MR damper.
Background technology
MR damper is a kind of novel semi-active damper device based on magnetorheological fluid controllable characteristics, which can be with
Resistance is generated to movement, and for the energy of dissipation movement, fast response time, simple in structure, body are possessed in its working range
Product is small, is easy to control and low power consumption and other advantages, is a kind of ideal vibration isolation earthquake-proof device, in the industries such as building, machinery, military project tool
Have wide application prospects.
Conventional springs damper is used for the place of various vibration dampings, but with requirement of the people for effectiveness in vibration suppression, spring
The effectiveness in vibration suppression that damper is played cannot be gradually satisfied with by people.The appearance of magnetorheological fluid promotes MR damper
Development, the outstanding representation in terms of vibration damping obtain industry favorable comment.When MR damper is applied to various occasions, work
As when every test data for measuring be optimal damping device working performance, research damper self-characteristic provide well according to
According to.When controlled device is vibrated, the Relative Vibration between controlled device main body and supporting body that controller is detected according to sensor
Situation makes corresponding analysis and decision, and generates the current driver that a control voltage acts on MR damper, passes through
Current driver loads the magnetic field intensity of a drive current adjustment magnet exciting coil to magnet exciting coil, so as to change within the Millisecond time
Become the yield stress size for the magnetorheological fluid being located in damper damp channel, adjust the damping of MR damper, realization pair
The semi-active damper vibration damping of controlled device vibration.In the semi-active damper damping control system of this closed loop, one important
Output quantity is exactly the moving displacement of MR damper piston head.
In existing half Active vibration-reducing system based on MR damper, MR damper piston head moving displacement is realized
The detection of information is mainly realized using the displacement sensor individually detached with MR damper.It is this by MR damper
The design detached with displacement sensor is easy to cause that sensor accuracy is not high, while can increase the volume of control system；And it senses
Device is directly exposed to be highly susceptible to external environment among external environment（Such as infiltration of mechanical collision, permeability, electromagnetic wave）It is dry
It disturbs and is even destroyed, so as to influence the global reliability of vibration control system and stability, shorten the service life of system.
Invention content
In order to solve the problems, such as background technology, the utility model proposes a kind of built-in range sensors to carry out displacement
The integrated-type MR damper of detection.Capacitive distance sensor is integrated with MR damper.Controlled device
During vibration, the piston head and damper cylinder barrel of damper generate relative motion.When magnet exciting coil is powered, magnetorheological fluid flows through liquid stream
It during channel, is influenced by magnetic current, the shear yield strength after rheology increases, and forms controllable damping force, hinders piston head movement, reaches
To vibration damping purpose.When piston head moves, moving displacement information is converted to two via the bevel edge equal proportion of dust cover inner top side
The minor change of radial clearance between a capacitive distance sensor and dust cover.Two capacitive distance sensor detections are with preventing
Radial clearance size between dust hood simultaneously exports sensing output signal, this signal takes mean value after equal proportion amplification again, you can obtains
The moving displacement information of piston head.According to obtained piston head moving displacement information, field coil current size is adjusted in due course, from
And the damping force control for being optimal, make damping force more compliant, energy expenditure is reduced while improving damping effect.
Simultaneously as capacitive distance sensor is placed in inside dust cover, external environment can effectively avoid（Such as mechanical collision, permeability
Infiltration, electromagnetic wave etc.）It pollutes and interferes caused by sensor.
Technical solution includes used by the utility model solves its technical problem：It is left lifting lug (1), piston rod (2), dust-proof
Cover (3), capacitive distance sensor I (4), capacitive distance sensor II (5), damper left end cap (6), damper cylinder barrel
(7), piston head (8), magnet exciting coil (9), nut (10), floating piston (11), damper right end cap (12) and right lifting lug
(13)；The left end of piston rod (2) is machined with external screw thread, and left lifting lug (1) is connect with piston rod (2) left end by screw threads for fastening；It is anti-
Dust hood (3) left side is threaded through-hole, and dust cover (3) is connect with piston rod (2) left end by screw threads for fastening；Condenser type away from
It is connect from sensor I (4) bottom end with damper left end cap (6) annular convex platform by screw threads for fastening；Capacitive distance sensor II
(5) bottom end is connect with damper left end cap (6) annular convex platform by screw threads for fastening；Circle is machined among damper left end cap (6)
Shape through-hole, piston rod (2) coordinates with damper left end cap (6) circular through hole internal surface gaps, and passes through sealing ring and be sealed；
Damper left end cap (6) is fixedly connected with damper cylinder barrel (7) by screw, and is sealed by sealing ring；In piston head (8)
Portion is machined with circular through hole, piston rod (2) right end and piston head (8) inner circular through-hole inner surface clearance fit；Piston head (8)
Left end is contacted by piston rod (2) step and positioned；Piston head (8) right end is machined with external screw thread, and piston head (8) right end passes through nut
(10) fastening positioning；Piston head (8) outer surface is machined with toroidal cavity, and magnet exciting coil (9) is wrapped in groove；Floating piston
(11) coordinate with damper cylinder barrel (7) internal surface gaps, and pass through sealing ring and be sealed；Damper right end cap (12) and damping
Device cylinder barrel (7) is fixedly connected by screw, and is passed through sealing ring and be sealed；Damper right end cap (12) right end is machined with outer spiral shell
Line, right lifting lug (13) are connect with damper right end cap (12) by screw threads for fastening.Damper left end cap (6), damper cylinder barrel (7)
Cavity between piston head (8) left side forms magnetorheological fluid cavity volume I；Piston head (8) right side, damper cylinder barrel (7) and
Cavity between floating piston (11) forms magnetorheological fluid cavity volume II；Piston head (8) outer surface and damper cylinder barrel (7) inner surface
Gap forms magnetorheological fluid fluid course；Floating piston (11), damper cylinder barrel (7) and damper right end cap (12) left side it
Between cavity form compressed gas cavity volume III.Piston head (8) is made with damper cylinder barrel (7) of mild steel permeability magnetic material；Excitation
The magnetic line of force generated in coil (9) reaches damper cylinder barrel (7) by piston head (8) by the magnetorheological fluid in fluid course,
Using the magnetorheological fluid return piston head (8) in fluid course, closed magnetic circuit is formed.Capacitive distance sensor I (4) and electricity
The lead of appearance formula range sensor II (5) is exported by the fairlead in damper left end cap (6)；The lead of magnet exciting coil (9)
It is exported by the fairlead in piston rod (2).
The utility model has an advantageous effect in that compared with background technology：
（1）The utility model integrates capacitive distance sensor with MR damper.When piston head moves,
Moving displacement information is converted to two capacitive distance sensors and dust cover via the bevel edge equal proportion of dust cover inner top side
Between radial clearance minor change.Two capacitive distance sensors detect the radial clearance size between dust cover and export
Sensing output signal, this signal take mean value after equal proportion is amplified again, you can obtain the moving displacement information of piston head.According to obtaining
Piston head moving displacement information, in due course adjust field coil current size, so as to the damping force control for being optimal.
（2）Compared with traditional half Active vibration-reducing system, the vibration insulating system formed using the utility model can effectively improve resistance
The control accuracy of Buddhist nun's power improves damping effect, obtains optimal effectiveness in vibration suppression, reduces system energy consumption.
（3）Compared with traditional half Active vibration-reducing system, the vibration insulating system that is formed using the utility model, which can effectively reduce, is
It unites volume, when avoiding sensor and being directly exposed to external environment, by external environment（Such as mechanical collision, permeability infiltration, electromagnetism
Wave etc.）Interference even destroy, so as to improve the reliability of vibration control system and stability, extend the service life of system,
And further widen the application scenario of MR damper.
Description of the drawings
Fig. 1 is the structure diagram of the utility model.
Fig. 2 is partial schematic diagram of the utility model piston motion to detection structure during stroke left end.
Fig. 3 is partial schematic diagram of the utility model piston motion to detection structure during stroke right end.
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawings and examples：
Fig. 1 is the structure diagram of the utility model, mainly including left lifting lug 1, piston rod 2, dust cover 3, condenser type away from
From sensor I 4, capacitive distance sensor II 5, damper left end cap 6, damper cylinder barrel 7, piston head 8, magnet exciting coil 9, spiral shell
Mother 10, floating piston 11, damper right end cap 12 and right lifting lug 13.
Fig. 2 is partial schematic diagram when the utility model piston head moves to stroke right end, and capacitive distance passes at this time
The radial clearance of sensor and dust cover is minimum, i.e., attached shown in Fig. 2h min。
Fig. 3 is partial schematic diagram when the utility model piston head moves to stroke left end, and capacitive distance passes at this time
The radial clearance of sensor and dust cover is maximum, i.e., attached shown in Fig. 3h max。
The operation principle of the utility model is as follows：
As shown in Figure 1, Figure 2 and Figure 3, when damper works, magnet exciting coil generates magnetic after being powered in effective damping gap
, the magnetorheological fluid work in magnetic field range forms controllable damping force.The moving displacement of piston head opposing damper cylinder barrel simultaneously
Information is converted to capacitive distance sensor I, capacitive distance sensor II with preventing via the inclined-plane equal proportion on the inside of dust cover
The minor change of radial clearance between dust hood, capacitive distance sensor I and capacitive distance sensor II detection with and export
Sensing output signal, this signal take mean value to can obtain the displacement information of piston after equal proportion amplification again.
The moving displacement information of piston head byx=(x 1+x 2)/2tanαIt is calculated, whereinxFor piston head displacement,x 1For electricity
Its radial clearance between dust cover medial slope that appearance formula range sensor I detects,x 2For capacitive distance sensor
II its radial clearance between dust cover medial slope detected,αInclination angle for dust cover medial slope.
When damper moves to stroke left end, at this time capacitive distance sensor can detect with dust cover inclined-plane it
Between radial clearance minimum valueh min；When damper piston moves to stroke right end, capacitive distance sensor can be examined at this time
Measure the maximum value of the radial clearance between dust cover inclined-planeh max；x 1Withx 2Size exist alwaysh minWithh maxBetween change.Root
According to obtained piston head displacement information, the size of current of magnet exciting coil is adjusted in due course, so as to the damping force control for being optimal,
Damping can be made more compliant, so as to improve damping effect, while reduce system energy consumption.In addition, since sensor is placed in
Inside dust cover, external environment can effectively avoid（Such as infiltration of mechanical collision, permeability, electromagnetic wave）The pollution caused by sensor
And interference.
Claims (4)
1. a kind of built-in range sensor carries out the integrated-type MR damper of displacement detecting, it is characterised in that including：It hangs on a left side
Ear (1), piston rod (2), dust cover (3), capacitive distance sensor I (4), capacitive distance sensor II (5), damper are left
End cap (6), damper cylinder barrel (7), piston head (8), magnet exciting coil (9), nut (10), floating piston (11), damper right end
Cover (12) and right lifting lug (13)；The left end of piston rod (2) is machined with external screw thread, and left lifting lug (1) passes through with piston rod (2) left end
Screw threads for fastening connects；Dust cover (3) left side is threaded through-hole, and dust cover (3) and piston rod (2) left end are tight by screw thread
It is solidly connected；Capacitive distance sensor I (4) bottom end is connect with damper left end cap (6) annular convex platform by screw threads for fastening；Capacitance
Formula range sensor II (5) bottom end is connect with damper left end cap (6) annular convex platform by screw threads for fastening；Damper left end cap
(6) intermediate to be machined with circular through hole, piston rod (2) coordinates with damper left end cap (6) circular through hole internal surface gaps, and passes through
Sealing ring is sealed；Damper left end cap (6) is fixedly connected, and it is close to pass through sealing ring with damper cylinder barrel (7) by screw
Envelope；Circular through hole, piston rod (2) right end and piston head (8) inner circular through-hole inner surface gap are machined with inside piston head (8)
Cooperation；Piston head (8) left end is contacted by piston rod (2) step and positioned；Piston head (8) right end is machined with external screw thread, piston head
(8) right end is fastened by nut (10) and positioned；Piston head (8) outer surface is machined with toroidal cavity, and magnet exciting coil (9) is wrapped in
In groove；Floating piston (11) coordinates with damper cylinder barrel (7) internal surface gaps, and passes through sealing ring and be sealed；Damper
Right end cap (12) is fixedly connected, and pass through sealing ring and be sealed with damper cylinder barrel (7) by screw；Damper right end cap
(12) right end is machined with external screw thread, and right lifting lug (13) is connect with damper right end cap (12) by screw threads for fastening.
2. a kind of built-in range sensor according to claim 1 carries out the integrated-type MR damper of displacement detecting,
It is characterized in that：Cavity between damper left end cap (6), damper cylinder barrel (7) and piston head (8) left side forms magnetorheological
Liquid cavity volume I；Cavity between piston head (8) right side, damper cylinder barrel (7) and floating piston (11) forms magnetorheological fluid cavity volume
Ⅱ；Piston head (8) outer surface forms magnetorheological fluid fluid course with damper cylinder barrel (7) internal surface gaps；Floating piston (11),
Cavity between damper cylinder barrel (7) and damper right end cap (12) left side forms compressed gas cavity volume III.
3. a kind of built-in range sensor according to claim 1 carries out the integrated-type MR damper of displacement detecting,
It is characterized in that：Piston head (8) is made with damper cylinder barrel (7) of mild steel permeability magnetic material；The magnetic generated in magnet exciting coil (9)
The line of force reaches damper cylinder barrel (7), using in fluid course by piston head (8) by the magnetorheological fluid in fluid course
Magnetorheological fluid return piston head (8), formed closed magnetic circuit.
4. a kind of built-in range sensor according to claim 1 carries out the integrated-type MR damper of displacement detecting,
It is characterized in that：The lead of capacitive distance sensor I (4) and capacitive distance sensor II (5) passes through damper left end cap
(6) the fairlead export in；The lead of magnet exciting coil (9) is exported by the fairlead in piston rod (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721736459.3U CN207554682U (en) | 2017-12-13 | 2017-12-13 | Built-in range sensor carries out the integrated-type MR damper of displacement detecting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721736459.3U CN207554682U (en) | 2017-12-13 | 2017-12-13 | Built-in range sensor carries out the integrated-type MR damper of displacement detecting |
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| Publication Number | Publication Date |
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| CN207554682U true CN207554682U (en) | 2018-06-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201721736459.3U Active CN207554682U (en) | 2017-12-13 | 2017-12-13 | Built-in range sensor carries out the integrated-type MR damper of displacement detecting |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109340298A (en) * | 2018-11-16 | 2019-02-15 | 重庆大学 | Cubage compensation structure built in damper piston |
| CN113984194A (en) * | 2021-10-29 | 2022-01-28 | 西南交通大学 | Cable-stay bridge cable vibration monitoring devices and system |
-
2017
- 2017-12-13 CN CN201721736459.3U patent/CN207554682U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109340298A (en) * | 2018-11-16 | 2019-02-15 | 重庆大学 | Cubage compensation structure built in damper piston |
| CN109340298B (en) * | 2018-11-16 | 2019-12-10 | 重庆大学 | Piston built-in volume compensation structure for damper |
| CN113984194A (en) * | 2021-10-29 | 2022-01-28 | 西南交通大学 | Cable-stay bridge cable vibration monitoring devices and system |
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