CN108468745A - A kind of damper piston valve arrangement - Google Patents
A kind of damper piston valve arrangement Download PDFInfo
- Publication number
- CN108468745A CN108468745A CN201810238867.9A CN201810238867A CN108468745A CN 108468745 A CN108468745 A CN 108468745A CN 201810238867 A CN201810238867 A CN 201810238867A CN 108468745 A CN108468745 A CN 108468745A
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- CN
- China
- Prior art keywords
- spool
- piston valve
- covering body
- piston rod
- damper
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
- F16F9/3405—Throttling passages in or on piston body, e.g. slots
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Fluid-Damping Devices (AREA)
Abstract
The invention discloses a kind of damper piston valve arrangements in damper field, it include the piston rod being made of coaxial major diameter section and axle journal section, piston rod cervical part of esophagus is equipped with piston valve, piston valve includes the spool being set on piston rod cervical part of esophagus, spool is made of porous material, spool is equipped with several through holes being mutually communicated, it can be connected to the oil pocket being located above and below spool by through hole, spool is equipped with the covering body of cladding spool, and the upper side and lower side of covering body is equipped with several through holes for axially penetrating through covering body.Porous material is applied to the valve core structure of damper piston valve by the present invention, using irregular porosity micro-structure inside porous material, is made to generate energy dissipation when being flowed through these porosity micro-structures by the fluid oppressed, is generated damping force；Using a large amount of pore structures of porous material surface, increase the contact area with upper lower oil cavitie, under high-speed working condition, avoid damper working characteristics from being distorted and fluid generation air pocket.
Description
Technical field
The invention belongs to damper field, more particularly to a kind of damper piston valve arrangement.
Background technology
Damper is usually in a motor vehicle the form of hydraulic mechanical type buffer, and is used especially in corresponding machine herein
Between the corresponding vehicle frame and vehicle bridge of motor-car.Then, on the one hand damper is used to prevent vehicle frame by runway at this location
Excitation in the case of, or waving in determining transport condition and vibrate, and on the other hand for realizing rapid decay
The vibration of wheel encouraged by runway.In the case that last-mentioned, it is thus always ensured that the road surface adhesion of the wheel.
In the prior art, there are a kind of damper and the piston valve for damper, number of patent application：
201480074437 .8；The applying date：2014 .12 .17；Publication No.：CN 105940238 A；Date of publication：2016.09.14；
Its structure includes piston rod, which is transitioned into the case where being configured with the backstop shaft shoulder in piston rod axle journal and in the work
Piston valve is guided at stopper rod axle journal, the backstop shaft shoulder of the piston valve against piston rod is pre-tightened, in an axial direction in the backstop shaft shoulder and work
Compensating plate is provided between plug valve, the compensating plate is compared to the component directly immediately of piston rod and/or piston valve by having more
The material of low yield limit is made.The compensating plate shape-ordinatedly clings at the backstop shaft shoulder and also clings to work when necessary
At the component directly immediately of plug valve.Therefore, the form tolerance that the compensating plate compensation backstop shaft shoulder is generated in production, it is caused
Angular deviation, to reduce cushion effect dispersion degree.The device produces fluid in damper using the hole in piston valve body, crack structure
Raw throttle effect forms damping force in turn, and is used for cylinder type damper.
But the device has the following deficiencies：For the device structurally, part is more, assembly relation is complicated, and
Complicated, the manufacture not easy to be processed of piston valve core；Meanwhile the damper will produce hole at high speeds, be transported in piston rod
Turn to when damping force will appear idle running, therefore, damping force can not be provided under these special operation conditions, effectiveness in vibration suppression will be caused to become
Difference；It is damping force caused by its valve core structure and fluid coupling to influence the most important factor of resistance of shock absorber characteristic, with
Toward damper flow through choke pressure caused by throttling pore and throttle chink using wherein fluid, make damper that there is throttling
Damping force, in order to promote damping force effect, throttling pore is typically small with throttle chink, and at high speeds, fluid is from high pressure
When cavity is moved by these throttling pores, throttle chink to low pressure volumes, it may appear that repairing not in time the problem of, so as to cause
Damper working characteristics is distorted, to influence effectiveness in vibration suppression, simultaneously as throttling pore is smaller with throttle chink, fluid
Speed when flowing through herein, causes oil liquid pressure to decline to a great extent, this will produce cavitation, and then cavitate, and influences to subtract
It shakes device service life.
Invention content
The object of the present invention is to provide a kind of damper piston valve arrangements, and porous material is applied to damper piston valve
Valve core structure makes to be flowed through the micro- knot of these holes by the fluid oppressed using irregular porosity micro-structure inside porous material
Energy dissipation is generated when structure, to generate damping force；Meanwhile using a large amount of pore structures of porous material surface, increase and upper and lower
The contact area of oil pocket avoids that damper working characteristics is distorted and air pocket occurs for fluid under high-speed working condition
Possibility enhances effectiveness in vibration suppression.
The object of the present invention is achieved like this：A kind of damper piston valve arrangement includes by coaxial major diameter section and axis
The piston rod of cervical part of esophagus composition, piston rod cervical part of esophagus are equipped with piston valve, and the piston valve includes being set on piston rod cervical part of esophagus
Spool, spool is made of porous material, and spool is equipped with several through holes being mutually communicated, and can be connected to point by through hole
Oil pocket that Wei Yu be above and below spool, spool are equipped with the covering body of cladding spool, the upper side and lower side of the covering body
It is equipped with several through holes for axially penetrating through covering body.
When the present invention works, piston rod band movable valve plug moves up and down, and passes through passing through on the through hole and covering body on spool
It perforates, the oil pocket above and below spool can interconnect.Compared with prior art, the beneficial effects of the present invention are：Nothing
Spool made of sequence porous material, from table to it is inner all have largely be mutually communicated and chaotic micro-pore and cavity, work as oil
Liquid constantly can be split and merge when passing through these micro-structures, to form turbulent flow in valve core inside；When fluid is from porous material
After expecting the oil pocket above and below the micro-pore entrance on surface, fluid particle is further mutually collided, is mixed during the motion
Pulsation is mixed, whirlpool is formed, to form turbulent flow inside fluid, these turbulent flows formed by fluid during piston motion
By the kinetic energy of great consumption piston, and damping force is provided for damper；Spool and covering body made of porous material and oil
The interface of liquid is there are large quantity micropore gap, and fluid be free to enter spool from oil pocket, and vice versa, this makes piston
Valve is under high-speed motion working condition, by the oil liquid pressure gradient and speed of piston valve and fluid interface that porous material makes
Gradient is much smaller than conventional piston valve, this is conducive to the generation for reducing cavitation, to improve damper in high-speed motion
Stability and reliability；After the piston valve construction made using porous material is applied to damper, exist since it is internal a large amount of
The micro-pore and cavity being mutually communicated, this allows the fluid in damper upper and lower cavities rapidly to pass through work according to pressure difference
Plug valve, to reduce the pressure difference of upper lower oil cavitie, so as to effectively avoid by the excessive idle running phenomenon brought of pressure difference, Jin Erti
The stability and reliability of high damper at runtime；Using porous material as spool, piston valve zero can greatly be reduced
The quantity of component, to simplify the process of processing and manufacturing damper.
As a further improvement on the present invention, the porous material is metal-rubber, metal polyporous material, open-cell foam aluminium
Or porous ceramic film material.Porous material from table to it is inner all have largely be mutually communicated and chaotic micro-pore and cavity.
As a further improvement on the present invention, the spool is combined by one or more in above-mentioned porous material.
As a further improvement on the present invention, the covering body is made of upper cover plate and annular body, and annular body is arranged
In spool periphery, upper cover plate is located at spool upper end, and the lower cover of filling covering body opening is correspondingly provided with below spool.Covering body will
Spool envelopes, and can protect spool, and the structure of covering body and lower cover is convenient for assembling and manufacture；Valve core inside hole, cavity
In the fluid that enters in oil pocket or oil pocket of fluid when entering valve core inside hole, be required for by running through on covering body
Hole further decreases the oil liquid pressure gradient and velocity gradient of piston valve and fluid interface, improves damper in high-speed motion
When stability and reliability.
As a further improvement on the present invention, through-hole, annular sleeve are coaxially provided on the upper cover plate, spool and lower cover
The periphery of body is equipped with sealing ring.Sealing ring is contacted with the barrel of damper, and the sealing ring is for sealing between covering body and barrel
Gap, make fluid in damper that can only pass through the upper lower oil cavitie of through hole disengaging on spool.
In order to enable the fluid in oil pocket is easier to enter spool, the fluid of valve core inside is easier to enter oil pocket, described
Through hole is equipped on upper cover plate and lower cover, the aperture of part through hole is more than the aperture of the through hole on spool.In oil pocket
Fluid the through hole in spool is entered by the through hole on covering body, the aperture of through hole is more than the aperture of through hole, more
Add and is easily accessible.
As a further improvement on the present invention, skeleton structure, skeleton structure packet are equipped on the upper cover plate and lower cover
Coaxial inner ring and outer ring is included, several reinforcing ribs being circumferentially evenly spaced on, reinforcing rib connection are equipped between inner ring and outer ring
Inner ring and outer ring.Skeleton structure can ensure spool being more stably mounted in covering body.
As a further improvement on the present invention, the piston rod major diameter section is equipped with convex shoulder, piston close to one end of covering body
The top and bottom of bar axle journal section are equipped with screw thread, and gasket is arranged between covering body and convex shoulder on piston rod cervical part of esophagus
One, it is located at below covering body on piston rod cervical part of esophagus and is arranged with gasket two, piston rod cervical part of esophagus lower end is equipped with fastening nut.Fastening
Covering body and spool are firmly secured on the convex shoulder of piston rod by nut, and structure is more secured.
Description of the drawings
Fig. 1 is the structural diagram of the present invention.
Fig. 2 is the vertical view of covering body.
Fig. 3 is the vertical view of bottom plate.
Wherein, 1 piston rod major diameter section, 2 convex shoulders, 3 piston rod cervicals part of esophagus, 4 gaskets one, 5 covering bodies, 501 upper cover plates, 502
Body, 6 spools, 7 lower covers, 8 sealing rings, 9 gaskets two, 10 fastening nuts, 11 outer rings, 12 reinforcing ribs, 13 inner rings.
Specific implementation mode
As shown in Figs. 1-3, it is a kind of damper piston valve arrangement, includes the work being made of coaxial major diameter section and axle journal section
Stopper rod, piston rod cervical part of esophagus 1 are equipped with piston valve, and the piston valve includes the spool 6 being set on piston rod cervical part of esophagus 3, valve
Core 6 is made of porous material, and spool 6 is equipped with several through holes being mutually communicated, and can be connected to and is located at by through hole
Oil pocket above and below spool 6, spool 6 are equipped with the covering body 5 of cladding spool 6, and the upper side and lower side of covering body 5 is equipped with
Several through holes for axially penetrating through covering body 5.The porous material be metal-rubber, metal polyporous material, open-cell foam aluminium or
Porous ceramic film material.Spool 6 is combined by one or more in above-mentioned porous material.Covering body 5 is by upper cover plate 501 and ring
Shape body 502 forms, and annular body 502 is set in 6 periphery of spool, and upper cover plate 501 is located at 6 upper end of spool, and 6 lower section of spool is corresponding
The lower cover 7 being open equipped with filling covering body 5.It is coaxially provided with through-hole, annular sleeve on upper cover plate 501, spool 6 and lower cover 7
The periphery of body 502 is equipped with sealing ring 8.Through hole is equipped on upper cover plate 501 and lower cover 7, the aperture of part through hole is more than
The aperture of through hole on spool 6.It is equipped with skeleton structure on upper cover plate 501 and lower cover 7, skeleton structure includes coaxial interior
Circle 13 and outer ring 11, are equipped with several reinforcing ribs 12 being circumferentially evenly spaced between inner ring 13 and outer ring 11, reinforcing rib 12 connects
Connect inner ring 13 and outer ring 11.Piston rod major diameter section 1 is equipped with convex shoulder 2, the upper end of piston rod cervical part of esophagus 3 close to one end of covering body 5
It is equipped with screw thread with lower end, gasket 1, piston rod are arranged between covering body 5 and convex shoulder 2 on piston rod cervical part of esophagus 3
It is located at 5 lower section of covering body on cervical part of esophagus 3 and is arranged with gasket 29,3 lower end of piston rod cervical part of esophagus is equipped with fastening nut 10.
When the present apparatus works, piston rod band movable valve plug 6 moves up and down, by the through hole and covering body 5 on spool 6
Through hole, the oil pocket above and below spool 6 can interconnect.The advantages of present apparatus, is：Made of unordered porous material
Spool, from table to it is inner all have largely be mutually communicated and chaotic through hole and cavity, when fluid passes through these through holes
Constantly it can be split and merge, to form turbulent flow in valve core inside；When fluid from the micro-pore of porous material surface into
After oil pocket above and below entering, further mutually collision, blending and the pulsation during the motion of fluid particle forms whirlpool,
To form turbulent flow inside fluid, these turbulent flows formed by fluid during piston motion will greatly consume piston
Kinetic energy, and provide damping force for damper；The interface of spool and covering body and fluid made of porous material exists a large amount of
Micro-pore, fluid be free to enter spool from oil pocket, and vice versa, this makes piston valve in high-speed motion operating mode item
Under part, the piston valve and the oil liquid pressure gradient and velocity gradient of fluid interface that are made by porous material are much smaller than conventional piston
Valve, this is conducive to the generation for reducing cavitation, to improve stability and reliability of the damper in high-speed motion；It utilizes
After the piston valve construction that porous material makes is applied to damper, exist since it is internal the micro-pore being largely mutually communicated and
Cavity, this allows the fluid in damper upper and lower cavities rapidly to pass through piston valve according to pressure difference, to reduce oil up and down
The pressure difference of chamber so as to effectively avoid by the excessive idle running phenomenon brought of pressure difference, and then improves damper at runtime
Stability and reliability；Using porous material as spool, the quantity of piston valve parts can greatly be reduced, to simplify
Fabricate the process of damper.
The invention is not limited in above-described embodiments, on the basis of technical solution disclosed by the invention, the skill of this field
For art personnel according to disclosed technology contents, one can be made to some of which technical characteristic by not needing performing creative labour
A little to replace and deform, these are replaced and deformation is within the scope of the invention.
Claims (8)
1. a kind of damper piston valve arrangement includes the piston rod being made of coaxial major diameter section and axle journal section, piston rod axle journal
Section is equipped with piston valve, which is characterized in that the piston valve includes the spool being set on piston rod cervical part of esophagus, and spool is using more
Porous materials are made, and spool is equipped with several through holes being mutually communicated, can be connected to by through hole be located above spool and
The oil pocket of lower section, spool are equipped with the covering body of cladding spool, and the upper side and lower side of the covering body is equipped with several axial directions and passes through
Wear the through hole of covering body.
2. a kind of damper piston valve arrangement according to claim 1, which is characterized in that the porous material is metal rubber
Glue, metal polyporous material, open-cell foam aluminium or porous ceramic film material.
3. a kind of damper piston valve arrangement according to claim 2, which is characterized in that the spool is by above-mentioned porous material
One or more in material are combined.
4. a kind of damper piston valve arrangement according to claim 1-3 any one, which is characterized in that the covering body
It is made of upper cover plate and annular body, annular body is set in spool periphery, and upper cover plate is located at spool upper end, is corresponded to below spool
Lower cover equipped with filling covering body opening.
5. a kind of damper piston valve arrangement according to claim 4, which is characterized in that the upper cover plate, spool and under
Through-hole is coaxially provided on cover board, the periphery of annular body is equipped with sealing ring.
6. a kind of damper piston valve arrangement according to claim 4, which is characterized in that on the upper cover plate and lower cover
It is equipped with through hole, the aperture of part through hole is more than the aperture of the through hole on spool.
7. a kind of damper piston valve arrangement according to claim 4, which is characterized in that on the upper cover plate and lower cover
Be equipped with skeleton structure, skeleton structure includes coaxial inner ring and outer ring, be equipped between inner ring and outer ring several circumferential directions it is uniform between
Every the reinforcing rib of distribution, reinforcing rib connects inner ring and outer ring.
8. a kind of damper piston valve arrangement according to claim 1-3 any one, which is characterized in that the piston rod
Major diameter section is equipped with convex shoulder close to one end of covering body, and the top and bottom of piston rod cervical part of esophagus are equipped with screw thread, piston rod axle journal
Gasket one is arranged in section between covering body and convex shoulder, is located on piston rod cervical part of esophagus below covering body and is arranged with gasket
Two, piston rod cervical part of esophagus lower end is equipped with fastening nut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810238867.9A CN108468745A (en) | 2018-03-22 | 2018-03-22 | A kind of damper piston valve arrangement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810238867.9A CN108468745A (en) | 2018-03-22 | 2018-03-22 | A kind of damper piston valve arrangement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108468745A true CN108468745A (en) | 2018-08-31 |
Family
ID=63264672
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810238867.9A Pending CN108468745A (en) | 2018-03-22 | 2018-03-22 | A kind of damper piston valve arrangement |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108468745A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112377551A (en) * | 2020-11-05 | 2021-02-19 | 扬州大学 | Automobile energy feedback type shock absorber with road condition recognition function and control system |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB750522A (en) * | 1953-10-27 | 1956-06-20 | Norman Ernest Butcher | Improvements in or relating to shock absorbing devices |
| DE19511628C2 (en) * | 1995-03-30 | 2001-05-17 | Walter Hunger | Method for coating a tread of a piston rod of a hydraulic piston-cylinder unit |
| WO2007149393A2 (en) * | 2006-06-16 | 2007-12-27 | University Of Maryland | System and method for magnetorheological-fluid damping utilizing porous media |
| 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 |
| CN103154560A (en) * | 2010-09-29 | 2013-06-12 | 丰田自动车株式会社 | Colloidal damper |
| CN203239825U (en) * | 2013-05-16 | 2013-10-16 | 哈尔滨工业大学 | Viscous fluid damper based on multi-hole throttling |
| CN206617493U (en) * | 2017-04-05 | 2017-11-07 | 长沙理工大学 | A kind of spring colloid damper |
| US20170335917A1 (en) * | 2015-11-12 | 2017-11-23 | Ronald Scott Bandy | Shock Absorber with Gas Permeable Internal Floating Piston |
| CN107687492A (en) * | 2016-12-14 | 2018-02-13 | 北京久硕新材科技发展有限公司 | Shock absorber for vehicle of micro- porous metal fiber felt as damping element |
-
2018
- 2018-03-22 CN CN201810238867.9A patent/CN108468745A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB750522A (en) * | 1953-10-27 | 1956-06-20 | Norman Ernest Butcher | Improvements in or relating to shock absorbing devices |
| DE19511628C2 (en) * | 1995-03-30 | 2001-05-17 | Walter Hunger | Method for coating a tread of a piston rod of a hydraulic piston-cylinder unit |
| WO2007149393A2 (en) * | 2006-06-16 | 2007-12-27 | University Of Maryland | System and method for magnetorheological-fluid damping utilizing porous media |
| CN103154560A (en) * | 2010-09-29 | 2013-06-12 | 丰田自动车株式会社 | Colloidal damper |
| 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 |
| CN203239825U (en) * | 2013-05-16 | 2013-10-16 | 哈尔滨工业大学 | Viscous fluid damper based on multi-hole throttling |
| US20170335917A1 (en) * | 2015-11-12 | 2017-11-23 | Ronald Scott Bandy | Shock Absorber with Gas Permeable Internal Floating Piston |
| CN107687492A (en) * | 2016-12-14 | 2018-02-13 | 北京久硕新材科技发展有限公司 | Shock absorber for vehicle of micro- porous metal fiber felt as damping element |
| CN206617493U (en) * | 2017-04-05 | 2017-11-07 | 长沙理工大学 | A kind of spring colloid damper |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112377551A (en) * | 2020-11-05 | 2021-02-19 | 扬州大学 | Automobile energy feedback type shock absorber with road condition recognition function and control system |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180831 |
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| RJ01 | Rejection of invention patent application after publication |