CN104847830A - General type composite gap magneto-rheological damping unit and magneto-rheological valve - Google Patents
General type composite gap magneto-rheological damping unit and magneto-rheological valve Download PDFInfo
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- CN104847830A CN104847830A CN201510140333.9A CN201510140333A CN104847830A CN 104847830 A CN104847830 A CN 104847830A CN 201510140333 A CN201510140333 A CN 201510140333A CN 104847830 A CN104847830 A CN 104847830A
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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
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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
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K13/00—Other constructional types of cut-off apparatus; Arrangements for cutting-off
- F16K13/08—Arrangements for cutting-off not used
- F16K13/10—Arrangements for cutting-off not used by means of liquid or granular medium
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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
- F16F2224/00—Materials; Material properties
- F16F2224/04—Fluids
- F16F2224/045—Fluids magnetorheological
Abstract
The invention relates to a general type composite gap magneto-rheological damping unit. The magneto-rheological damping unit comprises a winding sleeve, a valve element, a coil, a connecting pin and the like. According to the magneto-rheological damping unit, on the basis of the design of a magnetic conductive circular ring, the coinciding degree of a magnetic field and a disc-shaped liquid flow passage is increased, passive damping is lowered, and the system response speed is increased. The optimized structural size of the magneto-rheological damping unit is obtained through a non-dimensional analysis optimization method, and the inlet and outlet pressure drop adjusting range of the damping unit is enlarged. Meanwhile, the arrangement of high magnetic conductive materials and non-magnetic conductive materials, flux leakage is reduced, and the utilization rate of a magnetic field is increased. The damping unit can be applied to the fields of magneto-rheological valves, magneto-rheological damping vibration reducers and the like, and is wide in application range, compact in structure, good in performance and high in practicability.
Description
Technical field
The present invention relates to magnetic rheological liquid and hydraulic control and magnetorheological damping CHANNEL OPTIMIZATION design field, relate more specifically to a kind of versatility high, there is compostie damp gap, the optimized magnetorheological hydraulic control unit of damping capacity, this damping control unit can be used for pressure drop in the fields such as machinery, vehicle, building, Aero-Space and flow control.
Background technique
Magnetic flow liquid is a kind of novel intelligent material.Magnetic flow liquid, under magnetic fields, moment can change Bingham semi-solid state into from the good Newtonian fluid of flowing, and this change is continuous, controlled, reversible.Based on the good characteristic of magnetic flow liquid, large quantifier elimination is carried out to its application both at home and abroad.These researchs focus mostly in MR damper and magnetic rheological valve, and critical component wherein, be exactly a kind of damping control unit, magnetorheological damping control unit can be classified as.Utilize the magnetic rheological valve that magnetic flow liquid effect designs, come the magnetic field of controlled loading in magnetic flow liquid by the electric current changing field coil, with the flow characteristic of alter, form pressure reduction, thus change flow or damping force is provided.Compare conventional hydraulic valve, magnetic rheological valve has fast response time, is easy to control, the advantage such as have wider pressure drop and damp adjustable range is wide.In addition, due to the mechanical part without movement in magnetorheological fluid valve, therefore structure is simple, and noise is low, and energy consumption is little, wear-resistant, and working stability is reliable.Magnetic rheological valve is now widely used.
A core topic of the research of current magnetic rheological valve improves the adjustable extent of inlet outlet pressure differential.And this scope is relevant with the factor of two aspects.The first, the magnetic induction intensity in damping clearance; The second, magnetic flow liquid is in the length of the liquid chunnel of magnetic rheological valve inside.Therefore, in magnetorheological structural design, first want it is considered that the flow direction of magnetic flow liquid in magnetic rheological valve damping clearance must be vertical with magnetic direction; Next increases the liquid chunnel of magnetic flow liquid in magnetic rheological valve inside as far as possible.Generally, can start with from following two aspects and improve the adjustable extent of magnetic rheological valve inlet and outlet pressure difference.One is improve the magnetic induction intensity in damping clearance, and conventional method is the damping clearance width reducing magnetic rheological valve.But this method has the restrictive condition of itself: when magnetic flow liquid is long placed in non-use, when again enabling, easily there is particle precipitation thus blocking damping clearance, cause magnetic rheological valve to lose efficacy.Improve the length of damping clearance on the other hand, but this method can be subject to the condition restrictions such as the physical dimension of installing space and valve itself and be difficult to realize.Therefore, design a kind of stable performance and the magnetic rheological valve of structure relative compact, make that the inlet outlet pressure differential of magnetic rheological valve is larger, pressure control range is wider, is the problem that the industry needs solution badly.
In recent years, the design and devdlop of magnetic rheological valve obtains certain development.As Chinese patent 200810065763.9 (a kind of magnetic rheological valve of non-rectilinear fluid course) and Chinese patent 200810065316.3 (a kind of magnetic rheological valve of spiral flow passage) increase magnetic flow liquid to flow the length in path by arranging non-linear liquid chunnel or spiral flow passage on the corresponding end face of magnetic rheological valve positioning disk and magnetic conductive disk.But ignore magnetic intensity and the impact of magnetic induction line distribution on magnetic rheology effect, its effective damping gap is in the both sides of field coil, well do not utilize distribution and the trend of the magnetic line of force, in fact the adjustable extent of valve inlet outlet pressure differential cannot effectively be improved, damping clearance part is away from field coil in addition, can reduce magnetic induction intensity causes the response time slack-off, the harmful effects such as unstable properties.Chinese patent 200410022657.4 (having the magnetic rheoliquid controlling valve of two kinds of liquid flowing resistance passages) adopts ring and disc liquid flowing resistance passage simultaneously.Add the shearing area of liquid flowing resistance passage, under the effect of little exciting current, liquid flowing resistance just starts change, the control range of magnetic flow liquid flow is expanded, but the ring liquid chunnel in this valve arrangement does not make full use of coil magnetic field, reduce pressure reduction regulation range, the contact ratio of disc liquid chunnel and magnetic induction line is less, adds the passive damping of liquid chunnel, extend system response time, greatly reduce the effect that damping unit should play.
Summary of the invention
Patent of the present invention provides a kind of elementary cell and the parameter optimization design method with the magneto-rheological fluid control in compostie damp gap, compound clearance magnetorheological fluid damp unit according to the parameter optimization method design provided can be widely used in the field such as magnetorheological control valve and magnetorheological damping vibration damper, realizes the pressure drop to magnetic flow liquid and the height response of flow, gently noise, reliable and stable control.
The technical solution adopted for the present invention to solve the technical problems is as follows: a kind of universal compound clearance magnetorheological damping unit, and described damping unit comprises coiling sleeve, spool, coil, connecting pin, non-magnetic pad, upper magnetic conduction annulus, lower magnetic conduction annulus, upper magnetic conduction disk, lower magnetic conduction disk, cylinder body; Spool, coiling sleeve, coil, cylinder body are coaxially installed from inside to outside successively; Coiling sleeve is coaxially arranged on spool outside, and upper magnetic conduction disk, lower magnetic conduction disk are arranged on the two ends of spool respectively by connecting pin, be all lined with non-magnetic pad between upper magnetic conduction disk and spool, between lower magnetic conduction disk and spool, forms disc liquid chunnel; Upper magnetic conduction annulus is coaxially arranged on magnetic conduction disk outer portion, lower magnetic conduction annulus is coaxially arranged on lower magnetic conduction disk outer portion, between upper magnetic conduction annulus and upper magnetic conduction disk, forms ring liquid chunnel respectively between lower magnetic conduction annulus and lower magnetic conduction disk; Coil is around on coiling sleeve; Upper magnetic conduction disk end and lower magnetic conduction disk end are provided with screw thread; Described center spool is provided with cylindrical shape liquid chunnel, and ring liquid chunnel, disc liquid chunnel, cylindrical shape liquid chunnel are communicated with successively, formed complete Yuan Huan ?Yuan Pan ?cylindrical shape compostie damp gap; The side of cylinder body has fairlead, and the wire of coil is drawn from described fairlead; Cylinder interior arranges shoulder hole, and shoulder hole forms step with upper magnetic conduction annulus and coordinates; The width t of ring liquid chunnel
abe 0.02 ~ 0.15 with the scope of the ratio of outer surface of cylinder block radius R; The width t of disc liquid chunnel
rbe 0.02 ~ 0.15 with the scope of the ratio of outer surface of cylinder block radius R; Spool thickness R
cbe 0.25 ~ 0.7 with the scope of the ratio of outer surface of cylinder block radius R; Magnetic conduction disc thickness L
aand the scope of the ratio of the distance L between upper magnetic conduction annulus upper surface and lower magnetic conduction annulus lower surface is 0.1 ~ 0.4; Cylinder body thickness t
hbe 0.1 ~ 0.4 with the scope of the ratio of outer surface of cylinder block radius R.
Further, described upper magnetic conduction disk, lower magnetic conduction disk are equipped with chamfering in ring liquid chunnel ingress.
Further, described coiling sleeve, connecting pin, non-magnetic pad adopt non-magnet material, and upper magnetic conduction annulus, lower magnetic conduction annulus, upper magnetic conduction disk, lower magnetic conduction disk, cylinder body all adopt the permeability magnetic material with high permeability, high saturated magnetic induction characteristic.
Further, this is applied as: described damping unit is applied to hydrovalve and hydraulic damping vibration damper.
Apply a magnetic rheological valve for universal compound clearance magnetorheological damping unit, described magnetic rheological valve comprises above-mentioned damping unit, upper connecting ring, lower connecting ring, upper end cap, lower end cap, cylinder body seal circle, magnetic conduction annulus seal ring, end bracket enclosed circle;
Upper end cap, lower end cap are arranged on the two ends of cylinder body, upper end cap and cylinder body, are provided with end bracket enclosed circle between lower end cap and cylinder body, and upper connecting ring and lower connecting ring are arranged on the two ends of described damping unit respectively; Upper magnetic conduction disk and upper connecting ring, lower magnetic conduction disk and lower connecting ring are all threaded connection, and are provided with magnetic conduction annulus seal ring between upper connecting ring and upper magnetic conduction annulus, between lower connecting ring and lower magnetic conduction annulus; Cylinder body and upper connecting ring and lower connecting ring transition fit, be all furnished with cylinder body seal circle between cylinder body and upper connecting ring, between cylinder body and lower connecting ring;
Upper connecting ring, lower connecting ring arrange equally distributed at least 1 pod apertures, and pod apertures communicates with ring liquid chunnel; Upper end cap, lower end cap center are provided with through hole, and through-hole wall is provided with internal thread, and hydraulic tubing and through hole are threaded connection, and upper connecting ring, lower connecting ring, upper end cap, lower end cap are non-magnet material.
The present invention is compared with technical background, and the beneficial effect had has:
1. the present invention adopt the Yuan Huan after parameter optimization ?Yuan Pan ?cylindrical shape composite fluid flow passage.On the basis of existing technology, by mathematical modeling, Finite Element Simulation Analysis and majorized function optimization, determine suitable dimensionless design parameter, make magnetic rheoliquid controlling valve or damping shock absorber to the pressure drop of magnetic flow liquid or the control range of flow wider.
2. the present invention adds magnetic conduction annulus on the basis of existing technology, make damping unit structural type compacter on the one hand, decrease passive damping runner section, make system response time shorter, be conducive to the adjusting function improving damping unit, easily by changing the size of magnetic conduction disk and magnetic conduction annulus to change position and the size of liquid chunnel, thus optimal effectiveness can be reached on the other hand according to real needs.
3. cylinder body of the present invention adopts shoulder hole structure, ensure that location is convenient accurate, plays axially locating effect, be convenient to assembling.
4. the present invention can be widely used in, in hydrovalve and hydraulic damping vibration damper, improve the versatility of magnetorheological fluid damp unit.By the unit-modularized design of magnetorheological damping, in hydrovalve and damping shock absorber field, without the need to redesigning, can assemble on request with external hydraulic valve module or damping shock absorber module, improve production work efficiency.
5. what the present invention adopted permeability magnetic material and non-magnet material coordinates with poly-magnetic further, as connecting ring, coiling sleeve, connecting pin, pad adopt non-magnet material, magnetic conduction disk, magnetic conduction annulus, cylinder body, spool adopt permeability magnetic material, ensure that magnetic field is distributed in liquid chunnel as much as possible, improve magnetic field utilization ratio, make magnetorheological damping cell operation effect more remarkable.
6. the present invention can increase according to demand around magnetic sleeve and field coil group number.Often increase by one group, by increase by 1 section of annular fluid flow gap and 2 sections of radial fluid flow gap, form multistage pressure reduction controlled, add inlet outlet pressure differential regulation range, make application area of the present invention more wide.
Accompanying drawing explanation
Fig. 1 is compostie damp gap damping unit structural representation;
Fig. 2 is the magnetic circuit generation schematic diagram of compostie damp gap element;
Fig. 3 is the magnetic induction line distribution schematic diagram that finite element analysis obtains;
Fig. 4 is application example of the present invention---the structural representation of magnetorheological control valve;
Fig. 5 is application example of the present invention---the structure extension schematic diagram of magnetorheological control valve;
Fig. 6 is application example of the present invention---magnetorheological damping shock absorber structure schematic diagram;
Fig. 7 is the physical dimension figure of all parts of damping unit;
Coiling sleeve 1, spool 2, coil 3, connecting pin 4, non-magnetic pad 5, upper magnetic conduction annulus 6a, lower magnetic conduction annulus 6b, upper magnetic conduction disk 7a, lower magnetic conduction disk 7b, ring liquid chunnel 8, disc liquid chunnel 9, cylindrical shape liquid chunnel 10, cylinder body 11, upper connecting ring 12a, lower connecting ring 12b, upper end cap 13a, lower end cap 13b, cylinder body seal circle 14, magnetic conduction annulus seal ring 15, end bracket enclosed circle 16, piston rod 17, damper cylinder body 18, dynamic seal ring 20, connect end cap 21, rod seal circle 22, damper cylinder body seal circle 23, bearing 24 and attenuator end cap seal ring 25.
Embodiment
As described in Figure 1, a kind of universal compound clearance magnetorheological damping unit, described damping unit comprises coiling sleeve 1, spool 2, coil 3, connecting pin 4, non-magnetic pad 5, upper magnetic conduction annulus 6a, lower magnetic conduction annulus 6b, upper magnetic conduction disk 7a, lower magnetic conduction disk 7b, cylinder body 11; Spool 2, coiling sleeve 1, coil 3, cylinder body 11 are coaxially installed from inside to outside successively; It is outside that coiling sleeve 1 is coaxially arranged on spool 2 by transition fit, upper magnetic conduction disk 7a, lower magnetic conduction disk 7b are arranged on the two ends of spool 2 respectively by connecting pin 4, non-magnetic pad 5 is all lined with between upper magnetic conduction disk 7a and spool 2, between lower magnetic conduction disk 7b and spool 2, form disc liquid chunnel 9, by the size of the Assurance of Size disc liquid chunnel 9 of non-magnetic pad 5; It is outside that upper magnetic conduction annulus 6a is coaxially arranged on that magnetic conduction disk 7a is outside, lower magnetic conduction annulus 6b is coaxially arranged on lower magnetic conduction disk 7b, from fluid mechanics, damping pressure drop and flow equation fundamental formular as follows:
As shown from the above formula, when outside is measure-alike, the present invention, owing to increasing magnetic conduction annulus, decreases
value, thus decrease the passive pressure drop Δ P of disc liquid chunnel
r, η, namely reduce the damping of system, in the system works starting stage, or during high frequency response, substantially increase system response time.Therefore, the technical program is compared with previous patent, the magnetic conduction annulus that the basis in annulus-disk compostie damp gap increases, make the dimensional parameters of the position of ring runner and disc-shaped runner more reasonable, while guarantee damping pressure drop performance, make structure compacter, decrease the passive pressure drop part of disc liquid chunnel, improve system response time.
Between upper magnetic conduction annulus 6a and upper magnetic conduction disk 7a, ring liquid chunnel 8 is formed respectively between lower magnetic conduction annulus 6b and lower magnetic conduction disk 7b, the width of ring liquid chunnel 8 and disc liquid chunnel 9 can equal also can be unequal, 0.02 ~ 0.15 is with the scope of the ratio of cylinder body 11 outer surface radius R, upper magnetic conduction annulus 6a and upper magnetic conduction disk 7a, lower magnetic conduction annulus 6b coordinates with lower magnetic conduction disk 7b's the position determining ring liquid chunnel 8, improve magnetic field utilization ratio, increase the shearing force of magnetic field to magnetic flow liquid in ring runner, give full play to magnetic rheology effect, coil 3, around on coiling sleeve 1, when passing into field current, produces magnetic field in described damping unit, forms magnetic conductive loop, makes the magnetic flow liquid in runner produce magnetic rheology effect, produces pressure drop and reach damping, upper magnetic conduction disk 7a end and lower magnetic conduction disk 7b end are provided with outside thread, directly can be fixedly connected with by screw thread with external hydraulic valve cell or damper elements, in addition, upper magnetic conduction disk 7a, lower magnetic conduction disk 7b are equipped with chamfering in ring liquid chunnel 8 ingress, in case fluid stopping road internal drop sudden change, avoid turbulent flow, described spool 2 center is provided with cylindrical shape liquid chunnel 10, and ring liquid chunnel 8, disc liquid chunnel 9, cylindrical shape liquid chunnel 10 are communicated with successively, formed complete Yuan Huan ?Yuan Pan ?cylindrical shape compostie damp gap, the side of cylinder body 11 has fairlead, and the wire of coil 3 is drawn from described fairlead, cylinder body 11 inside arranges shoulder hole, and shoulder hole forms step with upper magnetic conduction annulus 6a and coordinates, and ensures that location is convenient accurate, plays axially locating effect, be convenient to assembling, the physical dimension of described unit as shown in Figure 7, the width t of ring liquid chunnel
abe 0.02 ~ 0.15 with the scope of the ratio of cylinder body 11 outer surface radius R, the width t of disc liquid chunnel
rbe 0.02 ~ 0.15 with the scope of the ratio of cylinder body 11 outer surface radius R, spool thickness R
cbe 0.25 ~ 0.7 with the scope of the ratio of cylinder body 11 outer surface radius R, magnetic conduction disc thickness L
aand the scope of the ratio of the distance L between upper magnetic conduction annulus 6a upper surface and lower magnetic conduction annulus 6b lower surface is 0.1 ~ 0.4, cylinder body thickness t
hbe 0.1 ~ 0.4 with the scope of the ratio of cylinder body 11 outer surface radius R.According to the requirement of applications environment and performance requirement or constraint, the optimal design of limited performance and structure is carried out in above-mentioned dimensional range, export the optimal design parameter of magnetorheological damping unit and the performance index after optimizing, be called Parameter sensitivity curve, on Parameter sensitivity curve, determine each physical dimension occurrence of magnetorheological optimum cell according to applied environment and performance requirement.Therefore, compared with previous patent, described damping unit is by meeting the impact of the performance such as application demand and the lower quantitative analysis physical dimension relative damping pressure drop of environmental applications restriction, optimize physical dimension, reach compact structure, reliability is high, response is fast, the optimized actual effect of damping capacity.
Fig. 2 and Fig. 3, is respectively magnetic circuit generation figure of the present invention and magnetic induction line distribution map.Closed dotted line as shown in Figure 2, through spool 2, disc liquid chunnel 9, upper magnetic conduction disk 7a, lower magnetic conduction disk 7b, ring liquid chunnel 8, upper magnetic conduction annulus 6a, lower magnetic conduction annulus 6b and cylinder body 11.Wherein, spool 2, upper magnetic conduction annulus 6a, lower magnetic conduction annulus 6b, upper magnetic conduction disk 7a, lower magnetic conduction disk 7b, cylinder body 11 all adopt permeability magnetic material.And connecting pin 4, pad 5, coiling sleeve 1 adopt non-magnet material poly-magnetic further, guarantee that magnetic line of force direction and liquid chunnel are mutually vertical, make the magnetic intensity in compound clearance reach maximum, give full play to magnetic rheology effect.Through Finite Element Simulation Analysis, use the magnetic induction line distribution of the present invention program as shown in Figure 3, magnetic induction line is all orthogonal with runner at ring liquid chunnel place and dish type liquid chunnel place.
As shown in Figure 4, apply a magnetic rheological valve for universal compound clearance magnetorheological damping unit, described magnetic rheological valve comprises above-mentioned damping unit, upper connecting ring 12a, lower connecting ring 12b, upper end cap 13a, lower end cap 13b, cylinder body seal circle 14, magnetic conduction annulus seal ring 15, end bracket enclosed circle 16; Upper end cap 13a, lower end cap 13b are threaded connection the two ends being arranged on cylinder body 11, and ensure that axially locating is accurate by the step contact arranged, and are convenient to assembling.Upper end cap 13a and cylinder body 11, be provided with end bracket enclosed circle 16 between lower end cap 13b and cylinder body 11, upper connecting ring 12a and lower connecting ring 12b is arranged on the two ends of described damping unit respectively; Upper magnetic conduction disk 7a and upper connecting ring 12a, lower magnetic conduction disk 7b and lower connecting ring 12b are all threaded connection, and are connected by connecting pin 4 with spool 2.Magnetic conduction annulus seal ring 15 is provided with between upper connecting ring 12a and upper magnetic conduction annulus 6a, between lower connecting ring 12b and lower magnetic conduction annulus 6b; Cylinder body 11 and upper connecting ring 12a and lower connecting ring 12b transition fit, all arrange cylinder body seal circle 14 between cylinder body 11 and upper connecting ring 12a, between cylinder body 11 and lower connecting ring 12b; Upper connecting ring 12a, lower connecting ring 12b is each is evenly provided with pod apertures, and pod apertures communicates with ring liquid chunnel 8, and during work, magnetic flow liquid flows in damp channel from end cap ingress through pod apertures; Upper end cap 13a, lower end cap 13b center are provided with through hole, through-hole wall is provided with internal thread, be threaded connection with the pipe joint in hydraulic tubing, upper connecting ring 12a, lower connecting ring 12b, upper end cap 13a, lower end cap 13b, be non-magnet material, coordinate with described damping unit, poly-magnetic further, makes magnetic conductive loop produce in the route of setting.The side of cylinder body 11 has fairlead, and the wire of coil 3 is drawn from described fairlead, and uses sealant sealing.
During use, magnetic flow liquid enters magnetic rheological valve from A mouth, on lower connecting ring, equally distributed pod apertures enters the ring liquid chunnel formed by magnetic conduction disk and magnetic conduction annulus, enter the disc liquid chunnel formed by magnetic conduction disk and spool again, flow into the center hole of spool, then flow into the corresponding composite fluid flow passage of the spool the other end by center hole.This valve arrangement is non-symmetry structure, but has bidirectional control valve function, can change the direction flowing to and flow out, not affect working effect.When damping unit coil not loading current time, magnetic flow liquid flowing is wherein laminar flow, and fluid is Newtonian fluid, and the pressure drop now produced is null field pressure drop, also referred to as passive damping pressure drop.When coil loading current, ring and radial fluid flow gap are all subject to Magnetic control, and the magnetic flow liquid in damping flow channel becomes Bingham fluid in very short time, produce pressure drop, reach flow and pressure drop control.The damping pressure drop that this valve provides is made up of passive damping and active damping two-part.Cylindrical shape liquid chunnel is substantially not affected by magnetic fields, mainly provides passive damping.
Fig. 5 shows the one two loop construction expanded application example of above-mentioned magnetic rheological valve, the magnetic rheological valve of this expansion has two field coils simultaneously, forms three groups of 9 effective magnetorheological damping gaps, forms two-stage pressure-regulating, make magnetic rheological valve inlet outlet pressure differential regulation range wider, control more flexible.The magnetic flow liquid pressure control valve of this structure extension adds 1 magnetic conduction annulus, 1 magnetic conduction disk, 1 spool, 1 group around magnetic sleeve and field coil.Ring liquid chunnel 8a is formed between magnetic conduction disk 7a and magnetic conduction annulus 6a, disc liquid chunnel 9a is formed between magnetic conduction disk 7a and spool 2a, pass through not magnetic conduction pad between magnetic conduction disk 7a and spool 2a and ensure the size of disc liquid chunnel 9a, in the middle of spool 2a, form cylindrical flow channel 10a.Similarly, all the other 6 sections of damping clearances can be obtained.In addition, according to user demand, the number of magnetic conduction disk, magnetic conduction annulus can be increased.Often increase by one group, by increase by 1 section of annular fluid flow gap and 2 sections of radial fluid flow gap.
Fig. 6 shows a kind of application example---magnetorheological damping vibration damper of the present invention.Except damping unit part, also comprise piston rod 17, damper cylinder body 18, dynamic seal ring 20, connection end cap 21, rod seal circle 22, damper cylinder body seal circle 23, bearing 24 and attenuator end cap seal ring 25.For the ease of installing, cylinder body 11 lower end arranges internal thread, and changes outer step structure into concave inward structure and coordinate with dynamic seal ring.Connect end cap 21, piston rod 17, attenuator end cap seal ring 25, rod seal circle 22, damping unit composition damping shock absorber piston.Connect the lower end that end cap 21 is arranged on cylinder body 11, connect between end cap 21 and lower magnetic conduction annulus 6b and be provided with attenuator end cap seal ring 25; Piston rod 17 is arranged on the upper end of cylinder body 11, is provided with rod seal circle 22 between piston rod 17 and cylinder body 11; Piston rod 17 is threaded connection with the upper magnetic conduction disk 7a in damping unit, and has coaxial center through hole.Piston rod 17 is stretched out from cylinder body upper end by the damper cylinder body seal circle 23 of damper cylinder body 18 upper end and bearing 24, in damper cylinder body 18, be filled with magnetic flow liquid.Cylinder body 11 be connected end cap 21 and be threaded connection, being coordinated by precise transition with piston rod 17 and seal with rod seal circle 22, cylinder body 11 external diameter is less than damper cylinder body 18 internal diameter and leaves certain interval, by dynamic seal ring 20 slipper seal.
Damper cylinder body 18, piston rod 17 be connected end cap 21 and be made up of non-magnet material, with poly-magnetic further, the magnetic circuit produced by coil is passed through in the path of setting.Arrange an aperture in poppet shaft to middle to be communicated with center spool hole, wire is drawn from center hole, sealer is adopted to be sealed by hole D again, be immersed in the part wire wrapped with insulation in magnetic flow liquid, by magnetic conduction disc centre hole E and piston rod center hole F, wire is drawn, be connected with external control devices.
Claims (5)
1. a universal compound clearance magnetorheological damping unit, is characterized in that: described damping unit comprises coiling sleeve (1), spool (2), coil (3), connecting pin (4), non-magnetic pad (5), upper magnetic conduction annulus (6a), lower magnetic conduction annulus (6b), upper magnetic conduction disk (7a), lower magnetic conduction disk (7b), cylinder body (11) etc.; Spool (2), coiling sleeve (1), coil (3), cylinder body (11) are coaxially installed from inside to outside successively; It is outside that coiling sleeve (1) is coaxially arranged on spool (2).Upper magnetic conduction disk (7a), lower magnetic conduction disk (7b) are arranged on the two ends of spool (2) respectively by connecting pin (4), between upper magnetic conduction disk (7a) and spool (2), between lower magnetic conduction disk (7b) and spool (2), be all lined with non-magnetic pad (5), form disc liquid chunnel (9); It is outside that upper magnetic conduction annulus (6a) is coaxially arranged on magnetic conduction disk (7a) outside, lower magnetic conduction annulus (6b) is coaxially arranged on lower magnetic conduction disk (7b), between upper magnetic conduction annulus (6a) and upper magnetic conduction disk (7a), forms ring liquid chunnel (8) respectively between lower magnetic conduction annulus (6b) and lower magnetic conduction disk (7b).Coil (3) is around on coiling sleeve (1); Upper magnetic conduction disk (7a) end and lower magnetic conduction disk (7b) end are provided with screw thread; Described spool (2) center is provided with cylindrical shape liquid chunnel (10), ring liquid chunnel (8), disc liquid chunnel (9), cylindrical shape liquid chunnel (10) are communicated with successively, form complete annulus-disk-cylindrical shape compostie damp gap.The side of cylinder body (11) has fairlead, and the wire of coil (3) is drawn from described fairlead; Cylinder body (11) inside arranges shoulder hole, and shoulder hole forms step with upper magnetic conduction annulus (6a) and coordinates; The width t of ring liquid chunnel
a0.02 ~ 0.15 is about with the scope of the ratio of cylinder body (11) outer surface radius R; The width t of disc liquid chunnel
r0.02 ~ 0.15 is about with the scope of the ratio of cylinder body (11) outer surface radius R; Spool thickness R
c0.25 ~ 0.7 is about with the scope of the ratio of cylinder body (11) outer surface radius R; Magnetic conduction disc thickness L
aand the scope of the ratio of the distance L between upper magnetic conduction annulus (6a) upper surface and lower magnetic conduction annulus (6b) lower surface is about 0.1 ~ 0.4; Cylinder body thickness t
h0.1 ~ 0.4 is about with the scope of the ratio of cylinder body (11) outer surface radius R.
2. damping unit according to claim 1, is characterized in that, described upper magnetic conduction disk (7a), lower magnetic conduction disk (7b) are equipped with chamfering in ring liquid chunnel (8) ingress.
3. damping unit according to claim 1, it is characterized in that, described coiling sleeve (1), connecting pin (4), non-magnetic pad (5) adopt non-magnet material, and upper magnetic conduction annulus (6a), lower magnetic conduction annulus (6b), upper magnetic conduction disk (7a), lower magnetic conduction disk (7b), cylinder body (11) all adopt permeability magnetic material.
4. an application for damping unit according to claim 1, is characterized in that, this is applied as: described damping unit is applied to hydrovalve and hydraulic damping vibration damper.
5. the magnetic rheological valve of the universal compound clearance magnetorheological damping unit of application, it is characterized in that, described magnetic rheological valve comprises damping unit according to claim 1, upper connecting ring (12a), lower connecting ring (12b), upper end cap (13a), lower end cap (13b), cylinder body seal circle (14), magnetic conduction annulus seal ring (15), end bracket enclosed circle (16);
Upper end cap (13a), lower end cap (13b) are arranged on the two ends of cylinder body (11), upper end cap (13a) and cylinder body (11), be provided with end bracket enclosed circle (16) between lower end cap (13b) and cylinder body (11), upper connecting ring (12a) and lower connecting ring (12b) are arranged on the two ends of described damping unit respectively; Upper magnetic conduction disk (7a) is all threaded connection with lower connecting ring (12b) with upper connecting ring (12a), lower magnetic conduction disk (7b), is provided with magnetic conduction annulus seal ring (15) between upper connecting ring (12a) and upper magnetic conduction annulus (6a), between lower connecting ring (12b) and lower magnetic conduction annulus (6b); Cylinder body (11) and upper connecting ring (12a) and lower connecting ring (12b) transition fit, be all furnished with cylinder body seal circle (14) between cylinder body (11) and upper connecting ring (12a), between cylinder body (11) and lower connecting ring (12b);
Upper connecting ring (12a), lower connecting ring (12b) are provided with equally distributed at least 1 pod apertures, and pod apertures communicates with ring liquid chunnel (8); Upper end cap (13a), lower end cap (13b) center are provided with through hole, through-hole wall is provided with internal thread, hydraulic tubing and through hole are threaded connection, and upper connecting ring (12a), lower connecting ring (12b), upper end cap (13a), lower end cap (13b) are non-magnet material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN105280327A (en) * | 2015-11-18 | 2016-01-27 | 中国计量科学研究院 | Solenoid |
| CN108922264A (en) * | 2018-08-30 | 2018-11-30 | 安徽工程大学 | English learning machine |
| CN109826903A (en) * | 2019-02-13 | 2019-05-31 | 杨泽达 | Set channel MR damper in a kind of bottom of band sedimentation Active dispersion devices |
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| CN1521409A (en) * | 2003-01-27 | 2004-08-18 | 玲 邱 | Method and apparatus for circulating magnetic rheid non-linearly in magnetic gap space |
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| CN108922264A (en) * | 2018-08-30 | 2018-11-30 | 安徽工程大学 | English learning machine |
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| CN109826903A (en) * | 2019-02-13 | 2019-05-31 | 杨泽达 | Set channel MR damper in a kind of bottom of band sedimentation Active dispersion devices |
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|---|---|
| CN104847830B (en) | 2017-03-01 |
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