CN107143603B - Valve component, piston unit and oil-pressure damper - Google Patents
Valve component, piston unit and oil-pressure damper Download PDFInfo
- Publication number
- CN107143603B CN107143603B CN201710512103.XA CN201710512103A CN107143603B CN 107143603 B CN107143603 B CN 107143603B CN 201710512103 A CN201710512103 A CN 201710512103A CN 107143603 B CN107143603 B CN 107143603B
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- Prior art keywords
- piston
- spool
- oil
- valve
- valve component
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- 239000007788 liquid Substances 0.000 claims abstract description 60
- 239000012530 fluid Substances 0.000 claims abstract description 28
- 238000007789 sealing Methods 0.000 claims description 24
- 239000006071 cream Substances 0.000 claims description 16
- 238000013016 damping Methods 0.000 abstract description 14
- 230000001629 suppression Effects 0.000 description 9
- 238000000034 method Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000003137 locomotive effect Effects 0.000 description 2
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000035772 mutation Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
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
- F16F9/32—Details
- F16F9/3207—Constructional features
- F16F9/3214—Constructional features of pistons
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Fluid-Damping Devices (AREA)
Abstract
The present invention proposes a kind of valve component, it is set on the piston only of oil-pressure damper, fluid bore is provided on valve bonnet, oil liquid above the piston only passes sequentially through the fluid bore and outlet to realize off-load and vibration-damping function, avoid the influence in the prior art when processing unloading port on spool blind hole side wall to the geometric tolerance between the valve bonnet and spool, it ensure that the cooperation precision between the valve bonnet and spool, and then make valve component of the invention that there is stable quality and precision property.Present invention further propose that a kind of piston unit, is applied on oil-pressure damper, is provided with valve component above-mentioned, there is stabilised quality and precision property.Present invention further propose that a kind of oil-pressure damper, is provided with piston unit above-mentioned, there is stabilised quality and precision property.
Description
Technical field
The invention belongs to rail locomotive vehicle oil-pressure damper technical field more particularly to a kind of valve components, piston
Unit and oil-pressure damper.
Background technique
Rail locomotive vehicle oil-pressure damper includes working cylinder and the piston unit that is placed in working cylinder, the oil cylinder
In be filled with off-load oil liquid, referring to Fig. 1 and Fig. 2, the piston unit includes piston only 11, the top of the piston only 11
It is provided with one or more valve component, each valve component includes valve bonnet 12, spool 13 and spring 14.The valve
Cover 12 and spool 13 are cylindrical-shaped structure, and the valve bonnet 12 is axial to be provided with through-hole 121, and the spool 13 is axially provided with blind
Hole 131, the outer surface of the valve bonnet 12 are threadedly coupled with the piston only 11, and the spool 13 is sheathed on the valve bonnet 12
In through-hole 121, the through-hole 121 play the guiding role to the movement of the spool 13, and 13 outer surface of the spool leads to described
121 internal surface gaps of hole cooperation, thus closing oil path；Rectangular off-load is provided in the bottom sidewall of 13 blind hole 131 of spool
Mouthfuls 132, it is connect by spring 14 with the piston only 11 at the top of the spool 13 so that the spool 13 can move up and down,
Oil sealing portion 15 is provided on the spool, the spring 14 can oppress 15 upper surface of oil sealing portion and 12 lower surface of valve bonnet
It fits with closing oil path, is provided with outlet at position corresponding with the spool 13 on the bottom surface of the piston only 11
111；When the piston only 11 moves upwards, the oil liquid pressure of the top of piston only 11 increases, and the spool 13 is in oil liquid
Pressure under move down, the unloading port 132 is separated with 12 through-hole of valve bonnet, 121 inner surface, on the piston only 11
Square oil liquid passes sequentially through the outlet 111 of the blind hole 131 of the spool 13, unloading port 132 and piston only 11, from piston only
11 tops flow into 11 lower section of piston only, to complete unloading process, reach effectiveness in vibration suppression.It is double in order to have oil-pressure damper
To off-load and effectiveness in vibration suppression, be further provided with valve component, 11 bottom of piston only on 11 bottom of piston only
The valve component in portion and the valve component at 11 top of piston only mutually deviate from and are staggered.
It can be seen from the above, the clearance fit between the valve bonnet inner surface and the valve core outer surface, it is ensured that stationary flow
It freely is oriented to the up and down motion of the spool, therefore, the cooperation morpheme between the valve bonnet inner surface and the valve core outer surface
Tolerance has very important influence to valve component and piston unit, and on the quality stability of entire oil-pressure damper.
But during processing unloading port, inevitably clamp the valve core outer surface, at the same valve core outer surface also by
To the mutation strength impact from process tool, and then the cylindricity and verticality of the valve core outer surface are influenced, influenced described
Clearance fit tolerance between valve bonnet inner surface and the valve core outer surface, and then influence the oil-pressure damper quality and precision
Stability.
Therefore, a kind of valve component with stable quality and precision property is designed, using the work of the valve component
The oil-pressure damper for filling in unit and the application piston unit, is very important to those skilled in the art.
Summary of the invention
The present invention technical problem unstable for existing oil-pressure damper quality and precision proposes a kind of with stabilization
Quality and precision property valve component, using the valve component piston unit and application the piston unit oil pressure subtract
Shake device.
In order to achieve the above object, the technical solution adopted by the present invention are as follows:
A kind of valve component, is set on the piston only of oil-pressure damper, including valve bonnet, and is movably sheathed on
Spool inside the valve bonnet, the outer surface of the valve bonnet are connect with the piston only, and the valve bonnet is provided with pilot hole, institute
Valve core housing is stated in the pilot hole, the spool and the pilot hole clearance fit are with closing oil path；The spool and institute
Piston only elastic connection is stated, the valve bonnet is provided with unloading hole away from one end of the pilot hole, institute is arranged on the valve bonnet
The one end for stating pilot hole is further provided with fluid bore, and the fluid bore is connected with the unloading hole；The spool is further
It is sheathed in the unloading hole, the internal surface gaps of the outer surface of the spool and the unloading hole cooperate with the oil liquid that circulates.
Preferably, the spool is further provided with the oil sealing portion that can be matched with the valve bonnet with closing oil path, institute
It states oil sealing portion to be set to below the valve bonnet, the top surface in the oil sealing portion is bonded with the bottom surface of the valve bonnet.
Preferably, the spool is further provided with tapered portion, the tapered portion is sheathed in the unloading hole, described
Tapered portion and the unloading hole clearance fit are with the oil liquid that circulates.
Preferably, the valve bonnet is further provided with shoe cream room, the top of the shoe cream room respectively with the pilot hole
It is connected with fluid bore, the bottom end of the shoe cream room is connected with the unloading hole.
Preferably, the spool is axially provided with throttle orifice, the phase of the spool away from one end of the piston only
The second blind hole is axially provided with to the other end, the throttle orifice is connected with second blind hole.
The present invention further provides a kind of piston units, are set in oil-pressure damper, including piston only, the piston
Valve component above-mentioned is provided on ontology.
Preferably, the valve component is axially set in the top and bottom of the piston only.
Preferably, the valve component of valve component and the piston only bottom at the top of the piston only is in axial direction
Upper interlaced setting.
Preferably, the circumferentially distributed top in the piston only of valve component at the top of the piston only；Institute
State the circumferentially distributed bottom in the piston only of valve component of piston only bottom.
The present invention further provides a kind of oil-pressure damper, including working cylinder, work above-mentioned is provided in the working cylinder
Fill in unit.
Compared with prior art, the advantages and positive effects of the present invention are:
1, fluid bore is arranged in valve component of the invention on the valve bonnet, and the oil liquid above the piston only successively leads to
The fluid bore and outlet are crossed to realize off-load and vibration-damping function, is avoided in the prior art on the spool blind hole side wall
Influence when processing unloading port to the geometric tolerance between the valve bonnet and spool, ensure that matching between the valve bonnet and spool
Precision is closed, and then makes valve component of the present invention that there is stable quality and precision.
2, valve component of the invention, the oil liquid above the piston only respectively flow through the unloading hole and the spool
Between access, the oil sealing portion top surface and the valve bonnet bottom surface between access when, be uniform flow in a circumferential direction
It crosses, the radial force that the oil liquid generates the spool is cancelled out each other, and avoids the local stress fatigue of the spool, further
Ground improves the quality and service life of valve component of the present invention.
3, valve component of the invention, is arranged tapered portion on the spool in setting, the tapered portion outer surface with it is described
Between off-load internal surface of hole formed variable cross-section oil liquid access, even if avoid because when the spool just moves downward at this circulation compared with
More oil liquid amount and the case where cause moment off-load, make the gentle off-load of valve component of the invention, it is steady to further improve quality
It is qualitative, and make the requirement that valve component of the invention meets damping force Yu unloading rate is linear or class is linear.
4, valve component of the invention, the valve bonnet are further provided with shoe cream room, and the shoe cream room can buffer the valve
Core moves downward impact of the oil liquid described in moment to the tapered portion outer surface, further increases the quality of valve component of the present invention
Stability.
5, valve component of the invention, the throttle orifice are set to the top of the spool, with throttling in the prior art
Hole is compared, not only easy to process, but also will not influence the cooperation essence of the valve core outer surface and the through-hole inner surface when processing
Degree.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of prior art oil-pressure damper piston unit；
Fig. 2 is A-A sectional view in Fig. 1；
Fig. 3 is the structural schematic diagram of valve component of the present invention；
Fig. 4 is the top view of valve component of the present invention and piston unit.
In above each figure: 11, piston only；111, outlet；12, valve bonnet；121, through-hole；13, spool；131, blind hole；
132, unloading port；133, throttle orifice；14, spring；15, oil sealing portion；
21, piston only；211, outlet；22, valve bonnet；221, pilot hole；222, unloading hole；223, fluid bore；224,
Shoe cream room；23, spool；231, oil sealing portion；232, tapered portion；233, throttle orifice；234, the second blind hole；24, spring.
Specific embodiment
In the following, the present invention is specifically described by illustrative embodiment.It should be appreciated, however, that not into one
In the case where step narration, element, structure and features in an embodiment can also be advantageously incorporated into other embodiments
In.
In the description of the present invention, it should be noted that the axial axial direction and piston for referring to working cylinder and piston only
The direction of ontology movement；Circumferentially refer to the circumferencial direction of working cylinder and piston only；Radial direction refers to working cylinder and piston only
Radial direction；The orientation or positional relationship of the instructions such as term "top", "bottom" "inner", "outside", "upper", "lower", "front", "rear" is base
In attached drawing 2 and attached positional relationship shown in Fig. 3, it is merely for convenience of description of the present invention and simplification of the description, rather than instruction or dark
Show that signified device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as pair
Limitation of the invention.In addition, term " first ", " second " are used for description purposes only, it is not understood to indicate or imply opposite
Importance.
Referring to Fig. 3, Fig. 3 is the structural schematic diagram of valve component of the present invention.As shown in figure 3, a kind of valve component, is set to
On the piston only 21 of oil-pressure damper, for closing or opening oil circuit to realize damping effect, filled in the oil-pressure damper
It is marked with oil liquid, valve component of the invention includes valve bonnet 22, spool 23 and spring 24, outer surface and the work of the valve bonnet 22
Plug body 21 is threadedly coupled, and sealing glue is played to meet the requirement of closing oil path in threaded connection place；The axial setting of the valve bonnet 22
There are pilot hole 221 and unloading hole 222, the spool 23 is from top to bottom successively sheathed on the pilot hole 221 and unloading hole 222
In, the outer surface at 23 top of spool and the inner surface premise clearance fit of the pilot hole 221, the precision of the clearance fit
Meet accurate guide function and can closing oil path, the interior table of the outer surface of 23 bottom of spool and the unloading hole 222
Face clearance fit is to form the access that oil liquid can be made to pass through；The valve bonnet 22 is provided with fluid bore 223 axially further, described to unload
The top in lotus hole 222 is connected with the pilot hole 221 and fluid bore 223 respectively, and the oil liquid of 21 top of piston only can
It is flowed between the unloading hole 222 and the spool 23 in access by the fluid bore 223；23 bottom surface of spool with it is described
The bottom surface elastic connection of piston only 21, i.e., the bottom surface phase of described spool 23 underrun spring 24 and the piston only 21
Even, the bottom surface of the piston only 21 position corresponding with the spool 23 is provided with outlet 211；When the piston only
When the 21 top oil liquid compressing spool 23 moves downward, the spring 24 will be compressed, the fluid bore 223 and the piston
21 lower section oil liquid of ontology is connected, so that the oil liquid of 21 top of piston only be made to pass sequentially through the fluid bore 223 and row
Outlet 211 is connected with the oil liquid of 21 lower section of piston only, and then realizes off-load and vibration-damping function.Valve body group of the invention
Part is realized off-load and vibration-damping function by the way that fluid bore 223 is arranged on the valve bonnet 22, is avoided in the prior art described
Influence when processing unloading port 132 on 13 blind hole of spool, 131 side wall to the geometric tolerance between the valve bonnet 12 and spool 13, is protected
The cooperation precision between the valve bonnet 22 and spool 23 has been demonstrate,proved, and then has made valve component of the present invention that there is stable quality and precision
Performance.
Further, unloading port 132 in the prior art is set to the side of 13 blind hole of spool, the piston only
The oil liquid of 11 tops passes through the unloading port 132 and flows into 11 lower section of piston only, and the oil liquid flows through the unloading port 132
When radial force inevitably is generated to 13 side wall of spool of 132 opposite side of unloading port, and then influence the spool 13
Service life；The oil liquid of valve component of the invention, 21 top of piston only flows through the unloading hole 222 and the valve
It is to flow uniformly through in a circumferential direction, the radial force that the oil liquid generates the spool 23 is mutual when access between core 23
It offsets, avoids the local stress fatigue of the spool 23, further increase the quality and use of valve component of the present invention
Service life.
With continued reference to Fig. 3, as shown in figure 3, the spool 23 is further provided with oil sealing portion 231,231, the oil sealing portion
In it is described can be with 22 lower section of the valve bonnet, the top surface in the oil sealing portion 231 is adjacent with the bottom surface of the valve bonnet 22, adjusts the bullet
The pretightning force of spring 24 is bonded the top surface in the oil sealing portion 231 and the bottom surface of the valve bonnet 22, with prevent the unloading hole 222 with
Oil liquid between the spool 23 is connected to the oil liquid of 23 bottom of spool.
Specifically, when initial position, the oil liquid pressure above and below the piston only 21 is balanced, 23 sets of the spool
In the pilot hole 221 and unloading hole 222, access passes through the fluid between the unloading hole 222 and the spool 23
Hole 223 is connected with the oil liquid of 21 top of piston only, the bottom surface phase of the top surface in the oil sealing portion 231 and the valve bonnet 22
Cooperation is with closing oil path；When the piston only 21 moves upwards, the oil liquid pressure of 21 top of piston only increases, institute
The oil liquid for stating 21 top of piston only oppresses the spool 23 and spring 24, and the spool 23 is made to move downward and make the bullet
Spring 24 compresses, so that the top surface in the oil sealing portion 231 be made to separate with 22 bottom surface of valve bonnet, and then opens oil circuit, that is, the work
The oil liquid of the top of plug body 21 pass sequentially through access between the fluid bore 223, the unloading hole 222 and the spool 23,
Access between 22 bottom surface of top surface and the valve bonnet in the oil sealing portion 231 flows into 23 bottom of spool, and eventually by institute
It states outlet 211 and flows into 21 lower section of piston only, the oil liquid pressure above and below the piston only 21 is made to balance each other,
Reach off-load and effectiveness in vibration suppression；When 21 stop motion of piston only, the restoring force of the spring 24 makes the spool 23
It moves upwards, is bonded the top surface in the oil sealing portion 231 again with 22 bottom surface of valve bonnet, so that oil circuit be made to close again.
Referring to Fig. 3 and Fig. 4, as shown in Figure 3 and Figure 4, the fluid bore 223 is set to 221 circumferential exterior of pilot hole
Circumferential ring body in, and the fluid bore 223 may be configured as one or more, to meet different off-load and damping requirements.
When the fluid bore 223 is multiple, in order to make in unloading process, uniformly, the multiple fluid bore 223 is uniformly divided for oil liquid circulation
It is distributed in the circumferential ring body of 221 circumferential exterior of pilot hole.
With continued reference to Fig. 3, as shown in figure 3, the spool 23 is further provided with tapered portion 232,232 sets of the tapered portion
In the unloading hole 222, oil liquid is formed between the outer surface of the tapered portion 232 and the inner surface of the unloading hole 222
Access, and be connected to the oil liquid in the fluid bore 223, so as to flow through the oil liquid of 21 top of piston only.It is described
The tip of tapered portion 232 is towards the pilot hole 221, i.e., when the spool 23 moves downward, 232 outer surface of tapered portion
The oil liquid area of passage between 222 inner surface of unloading hole gradually increases, so that the oil liquid amount flowed through at this be made gradually to increase
Add, the feelings of moment off-load are caused due to even if avoiding the oil liquid amount for circulating more at this when the spool 23 just moves downward
Condition makes the gentle off-load of valve component of the invention, further improves quality stability.
Further, as the spool 23 continues to move downward, the amount of compression increases for the spring 24, that is, makes this hair
Bright valve component generates bigger damping, while moving downward for the spool 23 leads to 232 appearance of tapered portion
Oil liquid access face between 222 inner surface of face and the unloading hole gradually increases, and the oil liquid amount flowed through at this increases, that is, reaches fast
The effect of fast off-load makes the requirement that valve component of the invention meets damping force Yu unloading rate is linear or class is linear.
With continued reference to Fig. 3, as shown in figure 3, the valve bonnet 22 is further provided with shoe cream room 224, the shoe cream room 224
Between the pilot hole 221 and unloading hole 222, and the top of the shoe cream room 224 respectively with the pilot hole 221 and fluid
Hole 223 is connected, and the bottom end of the shoe cream room 224 is connected with the unloading hole 222, because of the spool 23 and the pilot hole
221 premise clearance fit can realize accurate guide function and can closing oil path, when the spool 23 is sheathed on the guiding
When in hole 221 and unloading hole 222, the oil liquid of 21 top of piston only can pass through the fluid bore 223 and the shoe cream room
224 are connected, the shoe cream room 224 can buffer the spool 23 move downward oil liquid described in moment to the tapered portion 232 outside
The impact on surface further increases the quality stability of valve component of the present invention.
With continued reference to Fig. 3, as shown in figure 3, the spool 23 is axially provided with throttle orifice away from one end of the spring 24
233, the opposite other end of the spool 23 is axially provided with the second blind hole 234, the throttle orifice 233 and second blind hole
234 are connected.When the piston only 21 generate it is subtle move upwards, i.e., the oil liquid pressure of 21 top of the piston only is slightly
There is increase, and when the oil liquid pressure is not enough to overcome the elastic force of the spring 24, the oil liquid of 21 top of piston only can lead to
It crosses the throttle orifice 233 to flow into second blind hole 234, and is flowed into and lived by the outlet 211 on the piston only 21
21 lower section of plug body, to realize off-load and effectiveness in vibration suppression.
It should be noted that referring to Fig. 1 and Fig. 2, in the prior art, the bottom end of the blind hole 131 of the spool 13 is radially set
It is equipped with throttle orifice 133, the throttle orifice 133 connects the oil liquid of 11 lower section of oil liquid and the piston only in the blind hole 131
Logical, when the piston only 11 generates subtle when moving upwards, the oil liquid of 11 top of piston only can pass sequentially through institute
It states blind hole 131 and throttle orifice 133 flows into 11 lower section of piston only, to realize off-load and effectiveness in vibration suppression.But because of the throttle orifice
133 are located at the bottom surface of the blind hole 132, and processing is inconvenient, and when processing the throttle orifice 133, need to clamp described
The outer surface that spool 13 is matched with 12 through-hole 121 of valve bonnet, inevitably will affect 13 outer surface of spool and institute
State the cooperation precision of 121 inner surface of through-hole.
Further, valve component of the invention passes through institute by the way that throttle orifice 233 is arranged on the top of the spool 23
State throttle orifice 233 makes the oil liquid of 21 upper and lower of piston only be connected with the second blind hole 234, and the throttle orifice 233 is arranged
It is not only easy to process on the top of the spool 23, but also when processing the throttle orifice 233, it need to only clamp the spool
The outer surface of 23 least significant ends, the outer surface at this is non-matching surface, and then will not influence matching for valve component of the present invention
Precision is closed, the quality of valve component of the present invention and the stability of precision are further improved.
In order to further increase the sealing performance of valve component of the present invention, the valve bonnet 22 and 21 screw thread of piston only
The screw thread vice division chief of connection is coated with thread locking adhesive, to guarantee that it is firm that the valve bonnet 22 is installed in place rear position, and improves
The sealing performance of screw thread pair further improves valve component of the present invention and starves quality stability.
Present invention further propose that a kind of piston unit, is set in oil-pressure damper, including piston only 21, the work
Valve component above-mentioned is provided in plug body 21.
With continued reference to Fig. 4, as shown in figure 4, the valve component is axially set in the top and bottom of the piston only 21
The valve component in portion, 21 top of the valve component of 21 bottom of piston only and the piston only mutually deviates from setting, that is,
The valve component at 21 top of piston only and the valve component of 21 bottom of piston only are about the piston only
Central horizontal face is symmetrical arranged.
In order to make piston unit of the invention smoothly realize two-way off-load and vibration-damping function, 21 top of piston only
The valve component setting interlaced in the axial direction of valve component and 21 bottom of piston only.
With continued reference to Fig. 4, as shown in figure 4, the valve component at 21 top of the piston only may be configured as one or more
It is a, to meet different damping requirements.When the valve component at 21 top of piston only is set as multiple, the multiple valve
Body component is uniformly distributed circumferentially in the top of the piston only 21, when being moved upwards with increasing inventive piston ontology 21,
Stability during piston unit off-load and vibration damping.
Specifically, when the piston only 21 moves upwards, the oil liquid pressure increase of 21 top of piston only is simultaneously
The spring 21 for oppressing the 21 top body component of piston only compresses, and the spring 21 drives 21 crown valve of piston only
The spool 23 of body component declines, thus separate 23 oil sealing portion of spool, 231 top surface with 22 bottom surface of valve bonnet, the piston
The oil liquid of the top of ontology 21 pass sequentially through the fluid bore 223, shoe cream room 224, channel between tapered portion 232 and unloading hole 222,
Outlet 211 flows into 21 lower section of piston only, realizes off-load and effectiveness in vibration suppression.Multiple valves at 21 top of piston only
In body component, throttle orifice 233 is set at the top of one or more spool 23, is drawn when the piston only 21 moves upwards
When the increase of the 21 top oil liquid pressure of piston only risen is not enough to compressed spring 21, the 21 top oil liquid of piston only is successively
21 lower section of piston only is flowed by the throttle orifice 233 and the second blind hole 234, to realize off-load and effectiveness in vibration suppression.
Further, the valve component of 21 bottom of piston only may be configured as one or more, to meet difference
Damping requirements.When the valve component of 21 bottom of piston only is set as multiple, the multiple valve component is circumferentially
It is uniformly distributed in the bottom of the piston only 21, when being moved downward with increasing piston unit 21, inventive piston unit off-load
With the stability during vibration damping.
Specifically, when the piston only 21 moves downward, the oil liquid pressure increase of 21 lower section of piston only is simultaneously
The spring 21 for oppressing the 21 bottom body component of piston only compresses, and the spring 21 drives 21 bottom valve of piston only
The spool 23 of body component rises, thus separate 23 oil sealing portion of spool, 231 bottom surface with 22 top surface of valve bonnet, the piston
The oil liquid of the lower section of ontology 21 pass sequentially through the fluid bore 223, shoe cream room 224, channel between tapered portion 232 and unloading hole 222,
Outlet 211 flows into 21 top of piston only, realizes off-load and effectiveness in vibration suppression.Multiple valves of 21 bottom of piston only
In body component, throttle orifice 233 is arranged in one or more 23 bottom of spool, draws when the piston only 21 moves downward
When the increase of the 21 lower section oil liquid pressure of piston only risen is not enough to compressed spring 21, the 21 lower section oil liquid of piston only is successively
21 top of piston only is flowed by the throttle orifice 233 and the second blind hole 234, to realize off-load and effectiveness in vibration suppression.
Present invention further propose that a kind of oil-pressure damper, including working cylinder, work above-mentioned is provided in the working cylinder
Fill in unit.It is not described in detail herein.
Claims (10)
1. a kind of valve component is set on the piston only (21) of oil-pressure damper, including valve bonnet (22), and movably
It is sheathed on the internal spool (23) of the valve bonnet (22), the outer surface of the valve bonnet (22) is connect with the piston only (21),
The valve bonnet (22) is provided with pilot hole (221), and the spool (23) is sheathed in the pilot hole (221), the spool
(23) with the pilot hole (221) clearance fit with closing oil path；The spool (23) and the piston only (21) elasticity are even
It connects, it is characterised in that: the valve bonnet (22) is provided with unloading hole (222), the valve bonnet away from the one end of the pilot hole (221)
(22) one end that the pilot hole (221) is arranged on is further provided with fluid bore (223), the fluid bore (223) with it is described
Unloading hole (222) is connected；
The spool (23) is further sheathed in the unloading hole (222), the outer surface of the spool (23) and the off-load
The internal surface gaps in hole (222) cooperate with the oil liquid that circulates.
2. valve component according to claim 1, it is characterised in that: the spool (23) be further provided with can with it is described
The oil sealing portion (231) that valve bonnet (22) is matched with closing oil path, the oil sealing portion (231) are set to below the valve bonnet (22),
The top surface of the oil sealing portion (231) is bonded with the bottom surface of the valve bonnet (22).
3. valve component according to claim 1, it is characterised in that: the spool (23) is further provided with tapered portion
(232), the tapered portion (232) is sheathed in the unloading hole (222), the tapered portion (232) and the unloading hole (222)
Clearance fit is with the oil liquid that circulates.
4. valve component according to claim 3, it is characterised in that: the valve bonnet (22) is further provided with shoe cream room
(224), the top of the shoe cream room (224) is connected with the pilot hole (221) and fluid bore (223) respectively, the oil storage
The bottom end of chamber (224) is connected with the unloading hole (222).
5. valve component according to claim 1, it is characterised in that: the spool (23) deviates from the piston only (21)
One end be axially provided with throttle orifice (233), the opposite other end of the spool (23) is axially provided with the second blind hole (234),
The throttle orifice (233) is connected with second blind hole (234).
6. a kind of piston unit, is set in oil-pressure damper, including piston only (21), it is characterised in that: the piston sheet
Body is provided with valve component as described in any one in claim 1-5 on (21).
7. piston unit according to claim 6, it is characterised in that: the valve component is axially set in the piston sheet
The top and bottom of body (21).
8. piston unit according to claim 7, it is characterised in that: valve component at the top of the piston only (21) with
The valve component setting interlaced in the axial direction of piston only (21) bottom.
9. piston unit according to claim 8, it is characterised in that: the valve component edge at the top of the piston only (21)
The circumferentially distributed top in the piston only (21)；The valve component of piston only (21) bottom is circumferentially distributed in institute
State the bottom of piston only (21).
10. a kind of oil-pressure damper, including working cylinder, it is characterised in that: setting is appointed just like claim 6-9 in the working cylinder
Piston unit described in one.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710512103.XA CN107143603B (en) | 2017-06-28 | 2017-06-28 | Valve component, piston unit and oil-pressure damper |
| PCT/CN2017/101224 WO2019000646A1 (en) | 2017-06-28 | 2017-09-11 | Valve assembly, piston unit and oil damper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710512103.XA CN107143603B (en) | 2017-06-28 | 2017-06-28 | Valve component, piston unit and oil-pressure damper |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107143603A CN107143603A (en) | 2017-09-08 |
| CN107143603B true CN107143603B (en) | 2019-01-25 |
Family
ID=59784342
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710512103.XA Active CN107143603B (en) | 2017-06-28 | 2017-06-28 | Valve component, piston unit and oil-pressure damper |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN107143603B (en) |
| WO (1) | WO2019000646A1 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107143603B (en) * | 2017-06-28 | 2019-01-25 | 中车青岛四方车辆研究所有限公司 | Valve component, piston unit and oil-pressure damper |
| CN110822006B (en) * | 2019-11-26 | 2024-11-05 | 北京强度环境研究所 | A hydraulic shock absorber |
| CN110905960B (en) * | 2019-11-29 | 2021-11-30 | 中国北方车辆研究所 | Two-way discharge vibration damping valve |
| CN110886803B (en) * | 2019-11-29 | 2022-02-15 | 中国北方车辆研究所 | Single-cylinder type hydro-pneumatic spring |
| CN112240369B (en) * | 2020-10-27 | 2025-03-18 | 南阳淅减汽车减振器有限公司 | A valve device with adjustable compression damping |
| CN112727992B (en) * | 2020-12-22 | 2022-03-29 | 东风越野车有限公司 | Hydro-pneumatic spring base assembly integrating vehicle height sensor and valve bank |
| US12442430B2 (en) * | 2023-04-17 | 2025-10-14 | Advanced Suspension Technology Llc | Damper with base line valve |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4182438A (en) * | 1978-04-10 | 1980-01-08 | Maremont Corporation | Shock absorber with improved compression valve assembly |
| DE10138504B9 (en) * | 2000-06-13 | 2012-12-13 | Günter Stein | Vorfederrückschlagventil |
| US6443182B1 (en) * | 2000-11-08 | 2002-09-03 | Ingersoll-Rand Company | Non-slamming check valve |
| CN2736598Y (en) * | 2004-05-31 | 2005-10-26 | 深圳市中车业成实业有限公司 | Foot valve assembly for vehicle vibration isolator |
| CN1967009A (en) * | 2006-11-15 | 2007-05-23 | 深圳市中车业成实业有限公司 | Structure of fluid-alternating oil pressure damper for use in rail-bound locomotive and vehicle |
| WO2011045754A1 (en) * | 2009-10-14 | 2011-04-21 | Antonino Cultraro | Linear shock absorber |
| CN103851122B (en) * | 2012-12-07 | 2016-09-14 | 常州朗锐凯迩必减振技术有限公司 | Oil-pressure damper overflow valve |
| GB2522191B (en) * | 2014-01-15 | 2020-04-29 | Bamford Excavators Ltd | Bi-directional hydraulic flow control valve |
| CN203822930U (en) * | 2014-05-17 | 2014-09-10 | 刘广彬 | Oil pressure absorber for railway vehicle |
| CN105065542A (en) * | 2015-09-18 | 2015-11-18 | 珠海市业成轨道交通设备科技有限公司 | Piston unit of oil-pressure damper for rail locomotive |
| CN107143603B (en) * | 2017-06-28 | 2019-01-25 | 中车青岛四方车辆研究所有限公司 | Valve component, piston unit and oil-pressure damper |
-
2017
- 2017-06-28 CN CN201710512103.XA patent/CN107143603B/en active Active
- 2017-09-11 WO PCT/CN2017/101224 patent/WO2019000646A1/en not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| WO2019000646A1 (en) | 2019-01-03 |
| CN107143603A (en) | 2017-09-08 |
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