CN107687492A - Shock absorber for vehicle of micro- porous metal fiber felt as damping element - Google Patents
Shock absorber for vehicle of micro- porous metal fiber felt as damping element Download PDFInfo
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- CN107687492A CN107687492A CN201611149250.7A CN201611149250A CN107687492A CN 107687492 A CN107687492 A CN 107687492A CN 201611149250 A CN201611149250 A CN 201611149250A CN 107687492 A CN107687492 A CN 107687492A
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- piston
- shock absorber
- micro
- disc
- fiber felt
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/06—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using both gas and liquid
- F16F9/08—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using both gas and liquid where gas is in a chamber with a flexible wall
- F16F9/084—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using both gas and liquid where gas is in a chamber with a flexible wall comprising a gas spring contained within a flexible wall, the wall not being in contact with the damping fluid, i.e. mounted externally on the damper cylinder
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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
- F16F9/34—Special valve constructions; Shape or construction of throttling passages
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/36—Special sealings, including sealings or guides for piston-rods
- F16F9/368—Sealings in pistons
Abstract
Shock absorber for vehicle of micro- porous metal fiber felt as damping element, highly viscous hydraulic oil is used inside the shock absorber, damping element uses micro- porous metal fiber felt rather than conventional hydraulic valve, hydraulic oil is forcibly split flowing by metallic fiber when being flowed in the micropore of metal fiber felt, intensive shear and interior friction occurs in the two interface zone, so as to produce effective damping action, vibrational energy can quickly and efficiently be absorbed, driver comfort is lifted, Figure of abstract is a kind of exemplar schematic figure of the invention.
Description
Technical field
The invention belongs to automobile using shock absorber field.
Technical background
In Hyundai Motor engineering, improved with the mesh benefit of consumption upgrading, to vehicle high ride, high-comfort requirement
More and more higher.When disturbing caused impact or vibration to be transmitted by wheel by ground in vehicle operation, suspension is one to vehicle body
Individual effective isolation mounting, the good shock absorber with suspension matching system, 90% or so vibrational energy damping can be fallen.
Automotive suspension, widely used at present is Hydraulic shock absorber, and the working media in shock absorber is certain hydraulic pressure
Oil, it should strictly be referred to as liquid turbulent flow damper.Liquid turbulent flow damper is technically rather ripe so far
A kind of shock absorber.To be made comparisons from resistance and in terms of absorbing energy, it is in light weight, profile is small, can obtain more stable resistance,
And operating rate and the functional relation of resistance can be determined on demand.
As shown in Figure of description 1, critical piece includes the schematic diagram of traditional two-way function Hydraulic shock absorber：It is living
Stopper rod 1, upper oil chamber 2, flowing valve 3, bottom oil pocket 4, the recuperation valve 5 and compression valve 6, shoe cream room on bottom valve being distributed on piston
7th, the rebound valve 8 on piston, oil sealing 9.During shock absorber upper and lower ends relative motion, hydraulic oil flows through certain passage production of valve
Raw throttling action, forms damping force, to realize the damping characteristic of shock absorber by the pressure difference at valve both ends.
Two-way function Hydraulic shock absorber operation principle is described as follows：In compression travel, refer to automotive wheel and shift near car
Body, shock absorber is compressed, and now shock absorber inner carrier moves down, the volume reducing of piston lower chambers, oil pressure rise, fluid stream
The oil-in chamber 2 (epicoele) of upper piston area is flowed to through flowing valve 3.Upper oil chamber 2 has accounted for a part of space by piston rod 1, thus
The increased volume of epicoele is less than the volume that cavity of resorption reduces, and a part of fluid then just pushes compression valve 6 open, flows back to shoe cream room 7, these
Valve forms the damping force of the compressed motion of suspension to the throttling action of oil.For shock absorber in extension stroke, wheel is equivalent to remote
Vehicle body, the piston of shock absorber Tensile at this moment shock absorber are moved up, and piston upper chamber oil pressure rise, flowing valve 3 is closed, upper intracavitary
Fluid push rebound valve 8 open and flow into cavity of resorption 4, due to the presence of piston rod, the fluid come from epicoele stream is not enough to increase full of cavity of resorption
The volume added, cavity of resorption is promoted to produce certain vacuum, at this moment the fluid in shoe cream room 7, which pushes recuperation valve 5 open and flows into cavity of resorption 4, is carried out
Supplement, due to these valves throttling action to being suspended in stretching exercise when play damping action.
There are four big shortcomings in traditional two-way function Hydraulic shock absorber, first, the structure of piston valve and bottom valve is very multiple
It is miscellaneous, the bad guarantee of uniformity of product；Second, throttling action of the damping action mainly by valve block, valve when piston moves back and forth every time
Although the orifice size of piece part is smaller, caused interior friction energy-absorbing effect is limited, can provide larger opposition,
It is that the speed to consume energy is inadequate；Third, in the presence of the high speed distortion phenomenon being explained in detail below；Fourth, in order to form certain damping action, lead to
The internal pressure of normal traditional two-way function Hydraulic shock absorber designs easily causes piston rod in 3-5MPa, too high internal pressure
Frictional force is big between oil sealing, easily causes piston rod to wear and produce oil leakage phenomenon, the restricted lifetime of shock absorber.
Figure of description 2 is a kind of structure of the typical piston valve of currently used two-way function Hydraulic shock absorber,
It comprises at least 12 parts, including circulation valve spring 1, flowing valve throttle valve plate 2, piston 3, piston ring 4, rebound valve choke valve
Piece 5, adjust pad 6, packing ring 7, valve spring retainer 8 is upheld, spacer sleeve 9, pad 10, upholds valve spring 11, piston unt 12；Fig. 3
For the structure of common bottom valve, it comprises at least 9 parts, including compensation valve spring retainer 1, compensates valve spring 2, recuperation valve valve block
3, foot valve seat 4, compression valve throttle valve plate 5, pad 6, adjust pad 7, compression valve valve block 8, valve rod 9.Generally to upholding valve spring
Rigidity and Prestress design be more than compression valve, under the effect of same pressure, the passage in rebound valve and corresponding normal open gap
Section product summation is less than compression valve and corresponding normal open gap passage sectional area summation, and this causes caused by the extension stroke of shock absorber
Damping force is more than the damping force of compression travel, reaches the requirement of rapid vibration damping.
Figure of description 3 is a kind of structure of the bottom valve of typical currently used two-way function Hydraulic shock absorber,
It comprises at least 9 parts, including compensation valve spring retainer 1, compensates valve spring 2, recuperation valve valve block 3, foot valve seat 4, compression valve section
Flow valve block 5, pad 6, adjust pad 7, compression valve valve block 8, valve rod 9.Two big valve system parts are numerous, homogeneity of product and reliable
Property difficult management.
Traditional double-cylinder type hydraulic buffer is being restored stroke latter stage, and piston is at the top of shock absorber working chamber, now, stream
The working solution for entering cavity of resorption is not enough to be full of shock absorber cavity of resorption, at subsequent compression stroke initial stage, piston will " null " one segment distance,
Show on indicator card to be idle running.The compensation of cavity of resorption working solution is completed by the recuperation valve opened up on bottom valve, because hydraulic pressure subtracts
The structure of device of shaking is limited, and the aperture of recuperation valve has a threshold value, and the maximum stream flow of compensation is also certain.Absorber
In stroke, cavity of resorption requires that the flow of compensation is increased with the increase of shock absorber operating rate.Therefore, when speed increases to
When to a certain degree, the phenomenon of recuperation valve repairing deficiency will occur, compression travel idle running is finally occurred, this is referred to as shock absorber
Distort at a high speed.How sensitive no matter recuperation valve, be designed to by two-way function Hydraulic shock absorber, and all there is a critical speed
Degree：When shock absorber operating rate is higher than this critical speed, shock absorber external characteristics will be distorted, and this is general liquid-springing
The defects of device is intrinsic, if wanting to avoid this high speed distortion from occurring, inflatable vibration damper can be used, to improve the pressure in shoe cream room
Power, certain back pressure is formed, increase the pressure difference of oil storage cylinder and working cylinder cavity of resorption, the compensation ability of recuperation valve is improved, so as to carry
Higher critical velocity, make shock absorber that there is higher anti-distortion ability, the working solution in inflatable vibration damper is made in the gas of preliminary filling
Under, the compensation ability of recuperation valve is improved, so as to improve critical speed, even if shock absorber is made by stretching drastically and compression
With working solution will not also produce " emulsification " and " cavitation " phenomenon, be advantageous to eliminate the defects of general hydraulic buffer is intrinsic, vibration damping
The operating noise of device, the service behaviour of shock absorber is set more to stablize, comfortableness has obtained sufficient raising under high frequency state.
When vehicle continuously drives on worse road surface, inflatable vibration damper has excellent damping power than hydraulic vibration absorber
Continuation and high speed characteristics.Because shock absorber oil is easy to that foamed phenomenon occurs under continuous or high speed operation, so that
Idle running is produced when shock absorber works causes resistance discontinuous (this phenomenon is particularly acute in compression travel), after being filled with low-pressure nitrogen
Foamed phenomenon is essentially eliminated, so as to also eliminate the need for the idle running and non-continuous event of resistance, it is comfortable to improve vehicle carriage
With the handling stability of high speed." whooshing " sound caused by the shock absorber oil flow at high speed of shock absorber work is reduced in addition, so as to reduce
The noise of vehicle.Inflatable vibration damper can be shaken than common liquid device service life it is long because resistance continuation is guaranteed,
Particularly vehicle reduces shock absorber work idle running, reduced to a certain extent to vehicle when being travelled on worse road surface,
The particularly impact of suspension part, the life-span of shock absorber in itself is not only improved, and also improve the use of the other parts of suspension
Life-span.Due to reducing a set of valve system using floating floating plug, make structure greatly simplified, number of components about reduces 15%.
Figure of description 4 is a kind of typical inflatable vibration damper, wherein 1 is piston rod, 2 be cylinder, and 3 be compression spiral shell
Mother, 4 be rebound valve, and 5 be the O-ring seal of floating piston, and 6 be air bag, and 7 be floating piston, and 8 be cavity of resorption, and 10 be epicoele, and 11 are
Oil sealing assembly.Gas-filled shock absorber shortcoming is high to sealing requirements, therefore the difficulty for manufacturing gas-filled shock absorber is：Shock absorber
Inflation method and be inflate rear shock absorber resistance control, sealing and the guarantee in life-span.Need using special aerating device and
Technique, the seal of design specialized are to ensure the combination property of shock absorber after inflation.Special charger needs professional shock absorber
Equipment manufacturer manufactures.The shortcomings that other gas-filled shock absorber is the complicated of piston valve.
The hydraulic oil viscosity of traditional shock absorber is low, with the orifice size of valve block is limited, interior friction caused by throttling action
Effect deficiency, damping action caused by each reciprocating motion of piston or the absorption deficiency to vibrational energy.
The content of the invention
Above weak point based on prior art and product, it is fine that the present invention proposes a kind of micro- porous metals of new use
Tie up shock absorber for vehicle of the felt as damping element and using high viscosity hydraulic pressure oil medium.It is described in detail below：
The shock absorber for vehicle structural principle of the present invention is as shown in Figure of description 5, it is characterised in that the shock absorber mainly wraps
Include following parts：Cylinder 1, top Oil sealing assembly 2, clamping element 3, it is fixed on cylinder top and plays the micro- more of damping action
Mesoporous metal fibrofelt disc 4, pad 5, piston rod 6, the piston 7 being connected on piston rod, it is fixed on cylinder bottom and plays damping work
Micro- porous metal fiber felt disc 8, positioned at cylinder bottom and it is located at below disc 8, can move up and down and plays oil
The elasticity member that the floating piston 9 of envelope effect, the air bag for playing back pressure effect being connected with floating piston 9 or metal spring make
Part 10, the clamping element 11 of fixed disc 8, the clamping element 12 of fixed piston 7, upper opening is between Oil sealing assembly 2 and compresses
Between element 3, tubular type linker 13 of the lower openings between floating piston 9 and clamping element 11；With the position of upper-part
Relation refers to Figure of description 5；In compression travel, piston rod 6 moves downward with piston 7 in cylinder, in the oil pocket of bottom
Hydraulic oil flow downwardly through disc 8 in the case where the pressure of piston 7 chases after effect, a part of hydraulic oil is through practicing logical device 13 into the oil pocket on top
Flowing, disc 4, the oil pocket into upper piston area for then flowing through top, another part hydraulic oil compressing floating piston are transported downwards
Volume dynamic, to concede corresponding to the piston rod that top newly enters in cylinder；When restoring stroke, piston rod 6 exists with piston 7
Moved upwards in cylinder, the hydraulic oil in upper oil chamber flows up through disc 4 under the contention effect of piston 7, then the company of flowing through
Logical device 13 enters the oil pocket of bottom, and floating piston 9 moves upwards under the back pressure effect of lower airbag or metal spring, so as to mend
Repay the volume corresponding to the piston rod gone out out of cylinder；The minimum aperture of micro- porous metal fiber felt employed in disc 4 and 8
Footpath between 10~80 microns, porosity between 55~85%, metallic fiber thickness direction the number of plies more than 5 layers 200 layers with
Under, it is in colloid or the hydraulic oil of lubricating grease state that the hydraulic oil inside the shock absorber, which uses highly viscous, is preferably taken the photograph -30~80
Dynamic viscosity under family name's degree is between 0.15-20Pa*S；Hydraulic oil is strong by metallic fiber when being flowed in the micropore of metal fiber felt
The constantly segmentation flowing of property processed ground, hydraulic oil and numerous metallic fibers the interface zone of the two occur strong effective shearing and
Interior friction, so as to produce effective damping action, vibrational energy can be quickly and efficiently absorbed, lifts driver comfort.
Be described further below, in order to prevent move back and forth when metal fiber felt disc be stressed after deform, the present invention
Shock absorber inside micro- porous metal fiber felt disc both sides up and down using the protective layer for having eurypyloue high intensity, protect
Metal web of the sheath preferably using thickness between rigid expanded metal and/or the 20-80 mesh of 3-9 millimeters, to metal
Fibrofelt realizes pressuring action, ensure that effective shear action of the fiber to hydraulic oil.
Enough interior rubbing actions are formed in order to reach, micro- porous metal fiber felt disc inside the device that shakes of the invention
It is preferred that using 8-40 layers, 160-400 mesh weaving metallic fibers stratum reticulare it is folded be pressed together after be prepared, can be in compression
Under the conditions of the metallic fiber of the different numbers of plies is connected to become by an entirety using vacuum-sintering or electric resistance welding；The very few number of plies and mistake
Big aperture can cause effective shear action of metallic fiber and hydraulic oil insufficient, and the excessive number of plies and too small aperture can cause
Resistance is too big, piston moved downward slowly, and the impact sense to vehicle body and driver increases.
Under oil-free dry state, the air permeability G4 of micro- porous metal fiber felt used by the disc 4 of shock absorber of the invention
It is preferably between 40~1000L/ (min*dm2) (testing standard is according to ISO 4022), micro- porous metal fiber used by disc 8
The air permeability G8 of felt is between 80~2000L/ (min*dm2), in order that the resistance for restoring stroke is more than the resistance of compression travel,
It is preferred that the air permeability G4 ＜ G8 of micro- porous metal fiber felt.It is in glue that hydraulic oil inside the shock absorber of the present invention, which uses highly viscous,
The hydraulic oil of body or lubricating grease state, preferably the dynamic viscosity under -30~80 degrees Celsius is between 0.15-20Pa*S；Traditional
The viscosity of hydraulic oil is generally less than 0.03Pa*S, resistance when too small viscosity easily causes to flow in the micropore of metal fiber felt
Buddhist nun acts on deficiency, is caused using highly viscous hydraulic oil by metallic fiber forcibly constantly segmentation flowing, highly viscous hydraulic pressure
Oil means that the molecular weight in oil product is slightly higher, curling, winding effect it is stronger, macromolecule hydraulic oil with numerous metallic fibers
Strong effective shearing and interior friction occurs in the interface zone of the two, so as to produce effective damping action, passes through tune
The fiber composition structure of whole metal fiber felt, for example, using the metallic fiber stacking of different meshes, using the different numbers of plies, can be with
Regulation optimizes aperture and the porosity of micro- porous metal fiber felt, corresponding so as to obtain different air permeabilities or damping size
The purpose of the present invention can be reached by the viscosity combinations of optimizing regulation hydraulic oil, such as when using the micro- porous of lower drag
When metal fiber felt is as damping material, the hydraulic oil of larger viscosity can be used；Otherwise when the metal using higher drag is fine
When tieing up felt as damping material, the hydraulic oil of relative low viscosity can be used.It is of the invention in order to further enhance damping action
Piston 7 inside shock absorber can use micro- porous metal fiber felt disc with damping action to make, employed in piston 7
Micro- its dry state of porous metal fiber felt under air permeability G7 preferably its value=0.1~0.5*G4, i.e. its drag effect is more than it
Two upper and lower fibrofelts.In order to prevent being revealed at shock absorber packing gland, the pressure inside shock absorber of the invention is preferably controlled in
Below 2.5MPa, more preferably shock absorber internal pressure is controlled in below 1.5MPa by optimization piston diameter.
Brief description of the drawings
Accompanying drawing 1 show the schematic diagram of the two-way function Hydraulic shock absorber of current main flow, and critical piece includes：Piston
Bar 1, upper oil chamber 2, the flowing valve 3, bottom oil pocket 4, the recuperation valve 5 on bottom valve and the compression valve 6 that are distributed on piston, shoe cream room 7,
Rebound valve 8, oil sealing 9 on piston.
Accompanying drawing 2 is a kind of structure of the typical piston valve of currently used two-way function Hydraulic shock absorber, and it is at least
Including 12 parts, including circulation valve spring 1, flowing valve throttle valve plate 2, piston 3, piston ring 4, rebound valve throttle valve plate 5, adjust
Whole pad 6, packing ring 7, valve spring retainer 8 is upheld, spacer sleeve 9, pad 10, upholds valve spring 11, piston unt 12.
Accompanying drawing 3 is a kind of structure of the common bottom valve of currently used two-way function Hydraulic shock absorber, and it is at least
Including 9 parts, including compensation valve spring retainer 1, valve spring 2, recuperation valve valve block 3, foot valve seat 4, compression valve throttle valve plate are compensated
5, pad 6, adjust pad 7, compression valve valve block 8, valve rod 9.
Accompanying drawing 4 is a kind of typical inflatable vibration damper, wherein 1 is piston rod, 2 be cylinder, and 3 be clamp nut, and 4 be to stretch
Valve is opened, 5 be the O-ring seal of floating piston, and 6 be air bag, and 7 be floating piston, and 8 be cavity of resorption, and 10 be epicoele, and 11 be oil sealing group
Part.
Accompanying drawing 5 is exemplar schematic figure of the invention, and the shock absorber mainly includes following parts：Cylinder 1, top oil sealing
Component 2, clamping element 3, it is fixed on micro- porous metal fiber felt disc 4 that damping action is played on cylinder top, pad 5, piston
Bar 6, the piston 7 being connected on piston rod, it is fixed on micro- porous metal fiber felt disc 8 that damping action is played in cylinder bottom, position
In cylinder bottom and it is located at below disc 8, can move up and down and plays the floating piston 9 of oil sealing effect, with floating piston 9
The flexible member 10 that the air bag for playing back pressure effect or metal spring being connected make, the clamping element 11 of fixed disc 8, Gu
The clamping element 12 of fixed piston 7, upper opening is between Oil sealing assembly 2 and clamping element 3, lower openings are between floating piston
Tubular type linker 13 between 9 and clamping element 11.
Specific embodiment
A kind of shock absorber of the principle of the invention, mainly including following parts：The steel cylinder body 1 of 70 millimeters of diameter, on
Portion's Oil sealing assembly 2, clamping element 3, it is fixed on micro- porous metal fiber felt disc 4 that damping action is played on cylinder top, its hole
Gap rate 75%, minimum-value aperture 25-30 microns, vacuum-sintering system after metal fiber felt is compressed using the stainless (steel) wire of 25 layer of 320 mesh
Into the stephanoporate steel plate that 3 millimeters of thickness is respectively adopted in upper and lower ends face prepares rigid course, and inner circle is adopted with piston rod adjacent parts
It is being machined after being welded with the steel pipe of 5 millimeters of wall thickness with metal fiber felt, metal fiber felt is at room temperature used by disc 4
It is 330-400L/ (min*dm without the air permeability under oil condition2) (testing standard is according to ISO 4022)；Hydraulic pressure inside shock absorber
Oil uses the highly viscous hydraulic oil in colloidal state, and the dynamic viscosity under -30~80 degrees Celsius is between 1.5-10Pa*S；It is living
A diameter of 25 millimeters of stopper rod 6；The external diameter for the piston 7 being connected on piston rod is 63 millimeters, and piston uses metal fiber felt disk
Piece, the stephanoporate steel plate that 4 millimeters of thickness is respectively adopted in upper and lower ends face prepares rigid course, cylindrical position is mutually slided with cylinder inboard wall
The position of dynamic friction is machined again after being welded using the steel pipe of 5 millimeters of wall thickness with metal fiber felt, and the metal of intermediate course is fine
Tie up felt its porosity 65-70%, minimum-value aperture 15-20 microns, after metal fiber felt is compressed using the stainless (steel) wire of 35 layer of 400 mesh
Vacuum-sintering is made, and is at room temperature 80-160L/ (min*dm without the air permeability under oil condition2) (testing standard is according to ISO
4022)；It is fixed on micro- porous metal fiber felt disc 8 that damping action is played in cylinder bottom, its porosity 80%, minimum-value aperture
60-65 microns, metal fiber felt is made of vacuum-sintering after the stainless (steel) wire compression of 15 layer of 200 mesh, at room temperature without oil condition
Under air permeability be 800-900L/ (min*dm2) (testing standard is according to ISO 4022), thickness 3 is respectively adopted in upper and lower ends face
The stephanoporate steel plate of millimeter prepares rigid course；Positioned at cylinder bottom and it is located at below disc 8, can move up and down and plays
The floating piston 9 of oil sealing effect, the flexible member 10 for playing back pressure effect being connected with floating piston 9 use metal spring system
Make, 5 millimeters of the internal diameter of tubular type linker 13.
Claims (4)
1. shock absorber for vehicle of micro- porous metal fiber felt as damping element, it is characterised in that the shock absorber mainly include with
Lower parts：Cylinder 1, top Oil sealing assembly 2, clamping element 3, it is fixed on micro- porous gold that damping action is played on cylinder top
Belong to fibrofelt disc 4, pad 5, piston rod 6, the piston 7 being connected on piston rod, be fixed on cylinder bottom and play damping action
Micro- porous metal fiber felt disc 8, positioned at cylinder bottom and it is located at below disc 8, can move up and down and plays oil sealing work
The flexible member that floating piston 9, the air bag for playing back pressure effect being connected with floating piston 9 or metal spring make
10, the clamping element 11 of fixed disc 8, the clamping element 12 of fixed piston 7, upper opening is between Oil sealing assembly 2 and compresses member
Between part 3, tubular type linker 13 of the lower openings between floating piston 9 and clamping element 11；Closed with the position of upper-part
Figure of description 5 is referred in system；In compression travel, piston rod 6 moves downward with piston 7 in cylinder, in the oil pocket of bottom
Hydraulic oil flows downwardly through disc 8 under the contention effect of piston 7, and a part of hydraulic oil flows through practicing logical device 13 into the oil pocket on top
Dynamic, then to flow through top disc 4, the oil pocket into upper piston area, another part hydraulic oil compressing floating piston moves downward,
To concede top newly into the volume corresponding to the piston rod in cylinder；When restoring stroke, piston rod 6 is with piston 7 in cylinder
Move upwards in vivo, the hydraulic oil in upper oil chamber flows up through disc 4 under the contention effect of piston 7, then flows through connection
Device 13 enters the oil pocket of bottom, and floating piston 9 moves upwards under the back pressure effect of lower airbag or metal spring, so as to compensate
The volume corresponding to piston rod gone out out of cylinder；The minimum-value aperture of micro- porous metal fiber felt employed in disc 4 and 8
Between 10~80 microns, porosity between 55~85%, metallic fiber thickness direction the number of plies less than 200 layers more than 5 layers,
Hydraulic oil inside the shock absorber using highly viscous in colloid or the hydraulic oil of lubricating grease state, it is preferably Celsius -30~80
Dynamic viscosity under degree is between 0.15-20Pa*S；By metal when highly viscous hydraulic oil flows in the micropore of metal fiber felt
With numerous metallic fibers in the interface zone of the two strongly effective occurs for fiber forcibly constantly segmentation flowing, hydraulic oil
Shearing and interior friction, so as to produce effective damping action, vibrational energy can be quickly and efficiently absorbed, lifts driving comfort
Property.
2. shock absorber according to claim 1, it is characterised in that micro- porous metal fiber felt disc inside the shock absorber
The eurypyloue high intensity in both sides up and down protective layer, protective layer using thickness between 3-9 millimeters expanded metal and/or
The metal web of 20-80 mesh, micro- porous metal fiber felt disc inside the shock absorber is preferably using 8-40 layers, 160-400
Purpose weaving metallic fibers stratum reticulare is folded be pressed together after be prepared.
3. shock absorber according to claim 1, it is characterised in that under oil-free dry state, disc 4 is adopted inside the shock absorber
The air permeability G4 of micro- porous metal fiber felt is between 40~1000L/ (min*dm2), micro- porous metals used by disc 8
The air permeability G8 of fibrofelt is between 80~2000L/ (min*dm2), G4 ＜ G8.
4. shock absorber according to claim 1, it is characterised in that the piston 7 inside the shock absorber is made using with damping
Micro- porous metal fiber felt disc makes, the air permeability under micro- its dry state of porous metal fiber felt employed in piston 7
G7=0.1~0.5*G4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611149250.7A CN107687492B (en) | 2016-12-14 | 2016-12-14 | Shock absorber for vehicle of micro- porous metal fiber felt as damping element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611149250.7A CN107687492B (en) | 2016-12-14 | 2016-12-14 | Shock absorber for vehicle of micro- porous metal fiber felt as damping element |
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| Publication Number | Publication Date |
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| CN107687492A true CN107687492A (en) | 2018-02-13 |
| CN107687492B CN107687492B (en) | 2018-08-14 |
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| CN201611149250.7A Expired - Fee Related CN107687492B (en) | 2016-12-14 | 2016-12-14 | Shock absorber for vehicle of micro- porous metal fiber felt as damping element |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108412948A (en) * | 2018-03-02 | 2018-08-17 | 深圳市贝优通新能源技术开发有限公司 | A kind of safe and reliable type shock mitigation system for new-energy automobile |
| CN108468745A (en) * | 2018-03-22 | 2018-08-31 | 扬州大学 | A kind of damper piston valve arrangement |
| CN109340295A (en) * | 2018-12-12 | 2019-02-15 | 河海大学常州校区 | A kind of hydraulic damper of the auxiliary fuel tank with air bag |
| CN109340294A (en) * | 2018-12-12 | 2019-02-15 | 河海大学常州校区 | A kind of hydraulic damper of the auxiliary fuel tank with air bag |
| CN109538680A (en) * | 2018-11-27 | 2019-03-29 | 北京久硕新材科技发展有限公司 | Monotubular shock absorber of the gradient porous metal material with three-dimensional group hole as damping element |
| CN109667873A (en) * | 2018-12-21 | 2019-04-23 | 北京久硕新材科技发展有限公司 | Using the damper of the double dampings of cascade double-piston and using the vehicle of the damper |
| CN111173878A (en) * | 2020-01-22 | 2020-05-19 | 西北工业大学 | Self-adaptive viscous damper with self-resetting function |
| CN111895028A (en) * | 2020-07-09 | 2020-11-06 | 西安交通大学 | Shock absorber based on composite damping mechanism |
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| RU2006716C1 (en) * | 1991-08-07 | 1994-01-30 | Валентин Николаевич Власов | Aneroid device for valves |
| US6883649B2 (en) * | 2003-03-21 | 2005-04-26 | Delphi Technologies, Inc. | Closing system for a magneto-rheological damper |
| CN2617985Y (en) * | 2003-05-15 | 2004-05-26 | 哈尔滨工业大学 | Porous fluid meta rubber power damper |
| DE102011076200A1 (en) * | 2011-05-20 | 2012-11-22 | Bayerische Motoren Werke Aktiengesellschaft | Oil-filled two pipe-telescopic vibration damper for use in motor car, has piston displaceable in cylinder, and outer pipe connected with fastening element in force-fit and/or form-fit manner over fiber composite material of fastening device |
| CN202716873U (en) * | 2012-02-17 | 2013-02-06 | 大同市唯实机电设备有限公司 | Shock absorber for coal mine electric locomotive |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108412948A (en) * | 2018-03-02 | 2018-08-17 | 深圳市贝优通新能源技术开发有限公司 | A kind of safe and reliable type shock mitigation system for new-energy automobile |
| CN108412948B (en) * | 2018-03-02 | 2020-03-20 | 湖南省康德佳林业科技有限责任公司 | Safe and reliable damping system for new energy automobile |
| CN108468745A (en) * | 2018-03-22 | 2018-08-31 | 扬州大学 | A kind of damper piston valve arrangement |
| CN109538680A (en) * | 2018-11-27 | 2019-03-29 | 北京久硕新材科技发展有限公司 | Monotubular shock absorber of the gradient porous metal material with three-dimensional group hole as damping element |
| CN109340295A (en) * | 2018-12-12 | 2019-02-15 | 河海大学常州校区 | A kind of hydraulic damper of the auxiliary fuel tank with air bag |
| CN109340294A (en) * | 2018-12-12 | 2019-02-15 | 河海大学常州校区 | A kind of hydraulic damper of the auxiliary fuel tank with air bag |
| CN109667873A (en) * | 2018-12-21 | 2019-04-23 | 北京久硕新材科技发展有限公司 | Using the damper of the double dampings of cascade double-piston and using the vehicle of the damper |
| CN109667873B (en) * | 2018-12-21 | 2021-07-16 | 北京久硕新材科技发展有限公司 | Shock absorber adopting cascade double-piston double-damping |
| CN111173878A (en) * | 2020-01-22 | 2020-05-19 | 西北工业大学 | Self-adaptive viscous damper with self-resetting function |
| CN111895028A (en) * | 2020-07-09 | 2020-11-06 | 西安交通大学 | Shock absorber based on composite damping mechanism |
| CN111895028B (en) * | 2020-07-09 | 2021-10-08 | 西安交通大学 | Shock absorber based on composite damping mechanism |
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