CN105003589A - Magnetorheological damper with built-in magnetorheological valve for damping performance control - Google Patents
Magnetorheological damper with built-in magnetorheological valve for damping performance control Download PDFInfo
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- CN105003589A CN105003589A CN201510474450.9A CN201510474450A CN105003589A CN 105003589 A CN105003589 A CN 105003589A CN 201510474450 A CN201510474450 A CN 201510474450A CN 105003589 A CN105003589 A CN 105003589A
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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
- F16F9/10—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using liquid only; using a fluid of which the nature is immaterial
- F16F9/14—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect
- F16F9/16—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts
- F16F9/18—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts with a closed cylinder and a piston separating two or more working spaces therein
- F16F9/182—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts with a closed cylinder and a piston separating two or more working spaces therein comprising a hollow piston rod
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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
- F16F9/10—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using liquid only; using a fluid of which the nature is immaterial
- F16F9/14—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect
- F16F9/16—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts
- F16F9/18—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts with a closed cylinder and a piston separating two or more working spaces therein
- F16F9/19—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts with a closed cylinder and a piston separating two or more working spaces therein with a single cylinder and of single-tube type
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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
- F16F9/3207—Constructional features
- F16F9/3214—Constructional features of pistons
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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
- F16F9/3207—Constructional features
- F16F9/3221—Constructional features of piston rods
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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
- F16F9/3207—Constructional features
- F16F9/3235—Constructional features of cylinders
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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
- F16F9/53—Means for adjusting damping characteristics by varying fluid viscosity, e.g. electromagnetically
- F16F9/535—Magnetorheological [MR] fluid dampers
- F16F9/537—Magnetorheological [MR] fluid dampers specially adapted valves therefor
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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 magnetorheological damper with a built-in magnetorheological valve for damping performance control, which mainly comprises a piston rod, a piston cylinder, a damper cylinder body, a valve core, a floating piston, end covers, lifting lugs and the like. The piston rod, the damper cylinder body, the valve core, an excitation coil, cylinder liquid flow passages, and U-type liquid flow passages form the built-in magnetorheological valve. When the excitation coil is conductive, flowability of magnetorheological liquid inside effective damping gaps of the cylinder liquid flow passages and the U-type liquid flow passages is reduced due to electromagnetic effects, a pressure difference is formed between a first magnetorheological liquid accommodating cavity and a second magnetorheological liquid accommodating cavity, a damping force applied to the right end surface of the piston head changes, and the purpose that the magnetorheological valve controls the damping performance of the magnetorheological damper is realized. Due to the U-type liquid flow passages, the damping length is effectively increased, and the damping force adjustable range is increased. The magnetorheological damper is particularly suitable for being applied to a shock absorption system for a railway, a train, a bridge and the like, and has the advantages of large adjustment range, compact structure and small size.
Description
Technical field
The present invention relates to a kind of MR damper, particularly relate to the MR damper that a kind of built-in magnetorheological valve carries out damping capacity control.
Background technique
MR damper is a kind of Novel intelligent damper part be widely used in semi-active control aystem.The feature that its Millisecond speed of response, large control range and large damping force export, makes it become half outstanding active actuators part of industrial application.Current MR damper obtains extensive use in vibration damping of the vibration damping vibration prevention system of building and bridge, rail vehicles and automobile suspension system etc.
MR damper is mainly used to the vibration that control system device produces, and meets various kinds of equipment to the usage requirement under different operating mode and varying environment.Therefore the performance of MR damper directly has influence on static and dynamic performance and the functional reliability of various system, is the core cell in vibration insulating system.
Conventional MR damper is generally made up of piston, piston rod, cylinder body and the field coil be wrapped in piston winding slot.During work, by applying a certain size electric current to drive coil, produce magnetic field and the yield strength of the magnetic flow liquid flowed through in liquid chunnel is changed, thus dynamically change output damping force.
Existing MR damper great majority adopt circular ring type liquid flowing channel structure, and liquid flowing resistance passage is mainly arranged on coil inside or between coil and sleeve, and the piston of winding around is generally fixedly connected with piston rod.The boundary dimension of this kind of damper is all larger, and damping force adjustable extent is also narrow.
During MR damper structural design, the flow direction of magnetic flow liquid in effective damping gap first should be made mutually vertical with magnetic direction; Next is that the liquid chunnel making magnetic flow liquid in MR damper inside as far as possible lengthens.The circular ring type liquid flow damping passage of what at present designed MR damper adopted mostly is single field coil, and be the damping force adjustable extent being improved MR damper by following two kinds of methods.One is under identical input current, improves the magnetic induction intensity in effective damping gap as far as possible in magnetic flow liquid saturation range.Conventional method is the damping clearance width reducing MR damper, but is long placed in not with when again enabling due to magnetic flow liquid, easily occurs particle precipitation thus blocks damping clearance, causing MR damper to lose efficacy.Second is exactly improve effective damping gap length, but significantly can increase the volume of MR damper like this, and take more installation and usage space, manufacture cost is corresponding increase also.
Based on this, in actual design process, want to increase the magnetic induction intensity in effective damping gap simultaneously and improve the length in effective damping gap more difficult.Therefore, design a kind of stable performance and the MR damper of structure relative compact, the damping force that MR damper is exported is larger, damping force control range is wider, and being the problem that the industry needs solution badly, is also the prerequisite widening MR damper commercial Application further.
Summary of the invention
In order to overcome in background technique Problems existing and meet MR damper actual operation requirements, the present invention proposes the MR damper that a kind of built-in magnetorheological valve carries out damping capacity control.The piston cylinder of this MR damper, damper cylinder body, spool, field coil and cylinder body liquid chunnel and U-shaped liquid chunnel form built-in magnetic rheological valve, and the liquid chunnel of this built-in magnetic rheological valve is made up of jointly cylinder body liquid chunnel and U-shaped liquid chunnel.When being energized to field coil, a certain size magnetic field will be produced in cylinder body liquid chunnel and U-shaped liquid chunnel effective damping gap, the magnetic flow liquid viscosity flowing through effective damping gap increases, yield stress strengthens, thus mineralization pressure is poor between magnetic flow liquid cavity volume I and magnetic flow liquid cavity volume II, by controlling to apply effective control that size of current can realize damping force.This structural design make use of the trend of the magnetic line of force fully, under the prerequisite not reducing damping clearance width, increase effective damping length and shearing area, ensure that damper can export enough large damping force, can not result in blockage because damping clearance is too narrow simultaneously.In addition, the field coil of this MR damper is wrapped on built-in magnetorheological valve core, avoids traditional MR damper field coil and is wrapped on piston head and causes the deficiency that damping force adjustable extent is little.Adopt that the damping force dynamic adjustments scope of this MR damper is large, compact structure and volume is little, be specially adapted to railway, automobile, the isostructural vibration damping vibration prevention system of bridge.
The technical solution adopted for the present invention to solve the technical problems comprises: it is characterized in that comprising: left hanger (1), piston rod (2), piston cylinder (3), left end cap (4), screw I (5), field coil (6), damper cylinder body (7), floating piston (8), right end cap (9), right hanger (10), screw II (11), pressurized air cavity volume (12), magnetic flow liquid cavity volume I (13), cylinder body liquid chunnel (14), spool (15), U-shaped liquid chunnel (16), magnetic flow liquid cavity volume II (17), piston head (18), gas cavity volume I (19) and gas cavity volume II (20), left end and the right-hand member of piston rod (2) are processed with outside thread respectively, piston rod (2) left end is fixedly connected with by screw thread with left hanger (1), and piston rod (2) right-hand member is fixedly connected with by screw thread with piston head (18), piston rod (2) and piston cylinder (3) Spielpassung, piston rod (2) and piston cylinder (3) are sealed by seal ring, piston head (18) and piston cylinder (3) Spielpassung, piston head (18) and piston cylinder (3) are sealed by seal ring, piston cylinder (3) right part outer surface and intermediate portion outer surface are processed with two sections of outside threads, piston cylinder (3) is fixedly connected with by screw thread with left end cap (4), is sealed between piston cylinder (3) and left end cap (4) by seal ring, piston cylinder (3) right part is fixedly connected with by screw thread with damper cylinder body (7), left end cap (4) is fixedly connected with by screw I (5) with damper cylinder body (7), is sealed between left end cap (4) and damper cylinder body (7) by seal ring, spool (15) left side is processed with four circular positioning convex, four circular groove transition fit of four circular positioning convex and left end cap (4) right side, spool (15) right side is processed with four circular positioning convex, four circular groove transition fit of four circular positioning convex and damper cylinder body (7) end cap left side, toroidal cavity is processed with in the middle of spool (15), field coil (6) uniform winding is in the groove of spool (15), its lead-in wire is derived by the fairlead in damper cylinder body (7) end cap, and magnetic flow liquid can be avoided to be overflowed by fairlead, floating piston (8) and damper cylinder body (7) Spielpassung, floating piston (8) and damper cylinder body (7) are sealed by seal ring, right end cap (9) is fixedly connected with by screw II (11) with damper cylinder body (7), right end cap (9) and damper cylinder body (7) are sealed by seal ring, right end cap (9) right-hand member is processed with outside thread, and right end cap (9) is fixedly connected with by screw thread with right hanger (10), cavity between damper cylinder body (7) and floating piston (8) forms magnetic flow liquid cavity volume I (13), damper cylinder body (7) internal surface intermediate portion forms damper cylinder body (7) end cap, and damper cylinder body (7) end cap is processed with the waist through hole groove that 4 circumferences are evenly arranged, and forms cylinder body liquid chunnel (14), damper cylinder body (7) end cap, cavity between piston head (18) and piston cylinder (3) form magnetic flow liquid cavity volume II (17), spool (15) outer surface and damper cylinder body (7) internal surface surround ring liquid chunnel I, spool (15) left side and left end cap (4) right side surround disc liquid chunnel II, spool (15) internal surface and piston cylinder (3) outer surface surround ring liquid chunnel III, the damping clearance width of three sections of liquid chunnels is 1mm, ring liquid chunnel I, disc liquid chunnel II and ring liquid chunnel III form U-shaped liquid chunnel (16), magnetic flow liquid is filled with in magnetic flow liquid cavity volume I (13), magnetic flow liquid cavity volume II (17), U-shaped liquid chunnel (16) and cylinder body liquid chunnel (14), magnetic flow liquid cavity volume I (13) is communicated with U-shaped liquid chunnel (16) by cylinder body liquid chunnel (14) with magnetic flow liquid cavity volume II (17), when piston head (18) side-to-side movement, the magnetic flow liquid in magnetic flow liquid cavity volume I (13) and magnetic flow liquid cavity volume II (17) is flowed by cylinder body liquid chunnel (14) and U-shaped liquid chunnel (16) left and right, piston cylinder (3), damper cylinder body (7), spool (15), field coil (6) and cylinder body liquid chunnel (14) and U-shaped liquid chunnel (16) form the built-in magnetic rheological valve of MR damper, when inputting a certain size electric current to field coil (6), due to electromagnetic effect, to produce in cylinder body liquid chunnel (14) with U-shaped liquid chunnel (16) and magnetic flow liquid flows vertical magnetic field, direction, magnetic flow liquid flowing property in cylinder body liquid chunnel (14) and U-shaped liquid chunnel (16) is reduced, thus mineralization pressure is poor between magnetic flow liquid cavity volume I (13) and magnetic flow liquid cavity volume II (17), and then the damping force generation respective change making suffered by piston head (18) right side, realize the object that magnetic rheological valve controls Damp Properties of Magnetorheological Damper, when outside physical dimension does not increase, U-shaped liquid chunnel (16) effectively increases relaxation length, thus increases damping force adjustable extent.Cavity between piston rod (2) outer surface, piston cylinder (3) internal surface and piston head (18) left side forms gas cavity volume I (19); Cavity between piston rod (2) middle circle connected in star and piston head (18) left side forms gas cavity volume II (20); Piston rod (2) right-hand member is processed with the manhole that 4 circumferences are evenly arranged, and during piston rod (2) side-to-side movement, gas cavity volume I (19) and gas cavity volume II (20) carry out gas compensation by manhole.Cavity between floating piston (8), damper cylinder body (7) and right end cap (9) forms pressurized air cavity volume (12); Pressurized gas is filled in pressurized air cavity volume (12); When piston rod (2) in axial direction moves, can there is respective change in the volume of magnetic flow liquid cavity volume I (13) and magnetic flow liquid cavity volume II (17), now floating piston (8) can be floated by the left and right of axial direction and realize volume compensation.Piston cylinder (3), damper cylinder body (7) and spool (15) are made up of low carbon steel permeability magnetic material; Left hanger (1), piston rod (2), left end cap (4), screw I (5), floating piston (8), right end cap (9), right hanger (10), screw II (11) and piston head (18) are made up of stainless steel non-magnet_conductible material.
The present invention is compared with background technique, and the beneficial effect had is:
(1) piston cylinder of MR damper of the present invention, damper cylinder body, spool, field coil and cylinder body liquid chunnel and U-shaped liquid chunnel form built-in magnetic rheological valve, and the liquid chunnel of this built-in magnetic rheological valve is made up of jointly cylinder body liquid chunnel and U-shaped liquid chunnel.When being energized to field coil, a certain size magnetic field will be produced in cylinder body liquid chunnel and U-shaped liquid chunnel effective damping gap, the magnetic flow liquid viscosity flowing through effective damping gap increases, yield stress strengthens, thus mineralization pressure is poor between magnetic flow liquid cavity volume I and cavity volume II, by controlling to apply effective control that size of current can realize damping force.Under the prerequisite not reducing damping clearance width, this structural design increases effective damping length and shearing area, ensure that damper can export enough large damping force.
(2) compared with the MR damper be fixedly connected with the piston of traditional wound field coil and piston rod, the field coil of MR damper of the present invention is integrated on the spool of built-in magnetic rheological valve, separate with piston rod during design, this separate type design is under the prerequisite not increasing MR damper outside dimensions, adopt less field current just exportable larger controllable damping force, damping force dynamic adjustments scope is wider simultaneously, MR damper compact structure of the present invention and volume is little, be specially adapted to railway, automobile, the isostructural vibration damping vibration prevention system of bridge.
(3) MR damper of the present invention part used is except piston cylinder, damper cylinder body and spool are made up of low carbon steel permeability magnetic material, and remaining parts is made by non-magnet_conductible material.This design can effectively ensure the magnetic line of force as far as possible integrated distribution in effective damping gap, give full play to the effect of vertical magnetic field to magnetic flow liquid, improve the efficiency of MR damper, and effectively reduce the energy consumption of MR damper.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is damper housing structure schematic diagram of the present invention.
Fig. 3 is the A-A sectional drawing of Fig. 2 damper cylinder body.
Fig. 4 is inventive piston cylinder structure schematic diagram.
Fig. 5 is the B-B sectional drawing of Fig. 4 piston cylinder.
When Fig. 6 is Tensile of the present invention, magnetic flow liquid flows through the schematic diagram of liquid chunnel.
Fig. 7 is magnetic line of force distribution schematic diagram of the present invention.
Embodiment
Below in conjunction with drawings and Examples, the invention will be further described:
As shown in Figure 1, the present invention includes: left hanger 1, piston rod 2, piston cylinder 3, left end cap 4, screw I 5, field coil 6, damper cylinder body 7, floating piston 8, right end cap 9, right hanger 10, screw II 11, pressurized air cavity volume 12, magnetic flow liquid cavity volume I 13, cylinder body liquid chunnel 14, spool 15, U-shaped liquid chunnel 16, magnetic flow liquid cavity volume II 17, piston head 18, gas cavity volume I 19 and gas cavity volume II 20.
Fig. 2 is damper housing structure schematic diagram of the present invention, and in figure, 21 is damper cylinder body 7 end cap.
Fig. 3 is the A-A sectional drawing of Fig. 2 damper cylinder body, and in figure, 22 is waist through hole groove, and 23 is circular groove.Damper cylinder body 7 end cap is processed with the waist through hole groove 22 that 4 circumferences are evenly arranged, and forms cylinder body liquid chunnel 14.Spool 15 right side is processed with four circular positioning convex, and four circular groove 23 transition fit of four circular positioning convex and damper cylinder body 7 end cap left side, play the effect of axial restraint spool 15.
Fig. 4 is inventive piston cylinder structure schematic diagram.Piston cylinder 3 right part outer surface and intermediate portion outer surface are processed with two sections of outside threads; Piston cylinder 3 left part internal surface is processed with two toroidal cavities; Piston cylinder 3 right part is processed with 4 pass in and out U-shaped liquid chunnel 16 and magnetic flow liquid cavity volume II 17 liquid chunnel for magnetic flow liquid.
Fig. 5 is the B-B sectional drawing of Fig. 4 piston cylinder.In figure, 24 is the manhole that piston cylinder right part is axially evenly arranged, and 4 manholes form the liquid chunnel of the U-shaped liquid chunnel 16 of turnover and magnetic flow liquid cavity volume II 17.
When Fig. 6 is Tensile of the present invention, magnetic flow liquid flows through liquid chunnel schematic diagram.In figure, the magnetic flow liquid in magnetic flow liquid cavity volume I 13 flows through cylinder body liquid chunnel 14 and U-shaped liquid chunnel 16, is entered in magnetic flow liquid cavity volume II 17 by the manhole 24 of piston cylinder 3 right part.
Fig. 7 is magnetic line of force distribution schematic diagram of the present invention.Magnetic flow liquid in figure in cylinder body liquid chunnel 14 and U-shaped liquid chunnel 16 effective damping gap is subject to the effect of vertical magnetic field.
Working principle of the present invention is as follows:
As shown in Fig. 1, Fig. 6 and Fig. 7: piston rod drives piston head toward left movement, namely during MR damper Tensile, magnetic flow liquid in magnetic flow liquid cavity volume I flows through cylinder body liquid chunnel and U-shaped liquid chunnel, is entered in magnetic flow liquid cavity volume II by the manhole of piston cylinder right part.When being energized to field coil, due to magnetic fields, the magnetic flow liquid viscosity in cylinder body liquid chunnel and U-shaped liquid chunnel effective damping gap can increase, and yield stress strengthens.When magnetic flow liquid flows through effective damping gap, just must overcome the intermolecular power of this catenation, thus the resistance causing magnetic flow liquid to flow through liquid chunnel increases, and can slow down or stop the flowing of liquid, and make magnetic flow liquid cavity volume I and magnetic flow liquid cavity volume II produce pressure difference.By regulating size of current in field coil, the yield stress of magnetic flow liquid can be changed, to reach the object exporting damping force size needed for control piston end surface.
Otherwise, piston rod drives piston head to turn right motion, namely MR damper by compression time, the magnetic flow liquid now in magnetic flow liquid cavity volume II flows through cylinder body liquid chunnel and U-shaped liquid chunnel, is entered in magnetic flow liquid cavity volume I by the manhole of piston cylinder right part.By regulating size of current in field coil, same adjusting piston end surface exports damping force size.
Claims (5)
1. a built-in magnetorheological valve carries out the MR damper of damping capacity control, it is characterized in that comprising: left hanger (1), piston rod (2), piston cylinder (3), left end cap (4), screw I (5), field coil (6), damper cylinder body (7), floating piston (8), right end cap (9), right hanger (10), screw II (11), pressurized air cavity volume (12), magnetic flow liquid cavity volume I (13), cylinder body liquid chunnel (14), spool (15), U-shaped liquid chunnel (16), magnetic flow liquid cavity volume II (17), piston head (18), gas cavity volume I (19) and gas cavity volume II (20), left end and the right-hand member of piston rod (2) are processed with outside thread respectively, piston rod (2) left end is fixedly connected with by screw thread with left hanger (1), and piston rod (2) right-hand member is fixedly connected with by screw thread with piston head (18), piston rod (2) and piston cylinder (3) Spielpassung, piston rod (2) and piston cylinder (3) are sealed by seal ring, piston head (18) and piston cylinder (3) Spielpassung, piston head (18) and piston cylinder (3) are sealed by seal ring, piston cylinder (3) right part outer surface and intermediate portion outer surface are processed with two sections of outside threads, piston cylinder (3) is fixedly connected with by screw thread with left end cap (4), is sealed between piston cylinder (3) and left end cap (4) by seal ring, piston cylinder (3) right part is fixedly connected with by screw thread with damper cylinder body (7), left end cap (4) is fixedly connected with by screw I (5) with damper cylinder body (7), is sealed between left end cap (4) and damper cylinder body (7) by seal ring, spool (15) left side is processed with four circular positioning convex, four circular groove transition fit of four circular positioning convex and left end cap (4) right side, spool (15) right side is processed with four circular positioning convex, four circular groove transition fit of four circular positioning convex and damper cylinder body (7) end cap left side, be processed with toroidal cavity in the middle of spool (15), field coil (6) uniform winding is in the groove of spool (15), and its lead-in wire is derived by the fairlead in damper cylinder body (7) end cap, floating piston (8) and damper cylinder body (7) Spielpassung, floating piston (8) and damper cylinder body (7) are sealed by seal ring, right end cap (9) is fixedly connected with by screw II (11) with damper cylinder body (7), right end cap (9) and damper cylinder body (7) are sealed by seal ring, right end cap (9) right-hand member is processed with outside thread, and right end cap (9) is fixedly connected with by screw thread with right hanger (10), cavity between damper cylinder body (7) and floating piston (8) forms magnetic flow liquid cavity volume I (13), damper cylinder body (7) internal surface intermediate portion forms damper cylinder body (7) end cap, and damper cylinder body (7) end cap is processed with the waist through hole groove that 4 circumferences are evenly arranged, and forms cylinder body liquid chunnel (14), damper cylinder body (7) end cap, cavity between piston head (18) and piston cylinder (3) form magnetic flow liquid cavity volume II (17), spool (15) outer surface and damper cylinder body (7) internal surface surround ring liquid chunnel I, spool (15) left side and left end cap (4) right side surround disc liquid chunnel II, spool (15) internal surface and piston cylinder (3) outer surface surround ring liquid chunnel III, the damping clearance width of three sections of liquid chunnels is 1mm, ring liquid chunnel I, disc liquid chunnel II and ring liquid chunnel III form U-shaped liquid chunnel (16), magnetic flow liquid is filled with in magnetic flow liquid cavity volume I (13), magnetic flow liquid cavity volume II (17), U-shaped liquid chunnel (16) and cylinder body liquid chunnel (14), magnetic flow liquid cavity volume I (13) is communicated with U-shaped liquid chunnel (16) by cylinder body liquid chunnel (14) with magnetic flow liquid cavity volume II (17), when piston head (18) side-to-side movement, the magnetic flow liquid in magnetic flow liquid cavity volume I (13) and magnetic flow liquid cavity volume II (17) is flowed by cylinder body liquid chunnel (14) and U-shaped liquid chunnel (16) left and right, piston cylinder (3), damper cylinder body (7), spool (15), field coil (6) and cylinder body liquid chunnel (14) and U-shaped liquid chunnel (16) form the built-in magnetic rheological valve of MR damper, when inputting a certain size electric current to field coil (6), due to electromagnetic effect, to produce in cylinder body liquid chunnel (14) with U-shaped liquid chunnel (16) and magnetic flow liquid flows vertical magnetic field, direction, magnetic flow liquid flowing property in cylinder body liquid chunnel (14) and U-shaped liquid chunnel (16) is reduced, thus mineralization pressure is poor between magnetic flow liquid cavity volume I (13) and magnetic flow liquid cavity volume II (17), and then the damping force generation respective change making suffered by piston head (18) right side, realize the object that magnetic rheological valve controls Damp Properties of Magnetorheological Damper, when outside physical dimension does not increase, U-shaped liquid chunnel (16) effectively increases relaxation length, thus increases damping force adjustable extent.
2. described a kind of built-in magnetorheological valve according to claim 1 carries out the MR damper of damping capacity control, it is characterized in that: the cavity between piston rod (2) outer surface, piston cylinder (3) internal surface and piston head (18) left side forms gas cavity volume I (19); Cavity between piston rod (2) middle circle connected in star and piston head (18) left side forms gas cavity volume II (20); Piston rod (2) right-hand member is processed with the manhole that 4 circumferences are evenly arranged, and during piston rod (2) side-to-side movement, gas cavity volume I (19) and gas cavity volume II (20) carry out gas compensation by manhole.
3. a kind of built-in magnetorheological valve according to claim 1 carries out the MR damper of damping capacity control, it is characterized in that: the cavity between floating piston (8), damper cylinder body (7) and right end cap (9) forms pressurized air cavity volume (12); Pressurized gas is filled in pressurized air cavity volume (12); When piston rod (2) in axial direction moves, can there is respective change in the volume of magnetic flow liquid cavity volume I (13) and magnetic flow liquid cavity volume II (17), now floating piston (8) can be floated by the left and right of axial direction and realize volume compensation.
4. a kind of built-in magnetorheological valve according to claim 1 carries out the MR damper of damping capacity control, it is characterized in that: piston cylinder (3), damper cylinder body (7) and spool (15) are made up of low carbon steel permeability magnetic material; Left hanger (1), piston rod (2), left end cap (4), screw I (5), floating piston (8), right end cap (9), right hanger (10), screw II (11) and piston head (18) are made up of stainless steel non-magnet_conductible material.
5. a kind of built-in magnetorheological valve according to claim 1 carries out the MR damper of damping capacity control, it is characterized in that: the lead-in wire of field coil (6) is derived by the fairlead in damper cylinder body (7) end cap, and magnetic flow liquid can be avoided to be overflowed by fairlead.
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| CN109236936A (en) * | 2018-11-11 | 2019-01-18 | 华东交通大学 | A kind of MR damper being sealed using elastic metallic bellows |
| CN109822615A (en) * | 2019-03-28 | 2019-05-31 | 重庆大学 | The magnetorheological damping joint arrangement of controllable damping and rigidity |
| CN109991016A (en) * | 2019-03-07 | 2019-07-09 | 江苏大学 | A kind of magnetorheological damping automobile roller test stand and its control method |
| CN110847408A (en) * | 2019-12-04 | 2020-02-28 | 武汉理工大学 | Rotary device for actively controlling structural vibration |
| CN114151582A (en) * | 2021-12-10 | 2022-03-08 | 福州大学 | Magnetorheological fluid array valve device and control method thereof |
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| CN114791027A (en) * | 2021-10-11 | 2022-07-26 | 广西科技大学 | Damping clearance adjustable embeds hydraulic valve formula attenuator |
| CN114791026B (en) * | 2021-10-11 | 2023-05-05 | 广西科技大学 | Mixed valve type magneto-rheological damper |
| CN114791027B (en) * | 2021-10-11 | 2023-05-12 | 广西科技大学 | Built-in hydraulic valve type damper with adjustable damping gap |
| CN114251406A (en) * | 2021-11-18 | 2022-03-29 | 广西科技大学 | Rotary piston rod type anti-precipitation magnetorheological damper |
| CN114251406B (en) * | 2021-11-18 | 2024-03-15 | 广西科技大学 | Rotary piston rod type anti-sedimentation magnetorheological damper |
| CN114151582B (en) * | 2021-12-10 | 2023-09-29 | 福州大学 | Magnetorheological fluid array valve device and control method thereof |
| CN114151582A (en) * | 2021-12-10 | 2022-03-08 | 福州大学 | Magnetorheological fluid array valve device and control method thereof |
| WO2023226085A1 (en) * | 2022-05-27 | 2023-11-30 | 深圳市朝上科技有限责任公司 | Magnetorheological damper having toothed flow channel |
| CN115324982A (en) * | 2022-08-26 | 2022-11-11 | 中国人民解放军海军工程大学 | Self-adaptive hydraulic muffler device |
| CN115324982B (en) * | 2022-08-26 | 2024-03-26 | 中国人民解放军海军工程大学 | Self-adaptive hydraulic silencing device |
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