CN107091295B - Valve component, piston unit and oil-pressure damper - Google Patents
Valve component, piston unit and oil-pressure damper Download PDFInfo
- Publication number
- CN107091295B CN107091295B CN201710525562.1A CN201710525562A CN107091295B CN 107091295 B CN107091295 B CN 107091295B CN 201710525562 A CN201710525562 A CN 201710525562A CN 107091295 B CN107091295 B CN 107091295B
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- Prior art keywords
- piston
- spool
- valve component
- blind hole
- oil
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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
- 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 present invention proposes a kind of valve component, it is set on the piston only of oil-pressure damper, compensating groove is provided on spool, and the shoulder matched with valve bonnet guiding blind hole inner bottom surface is provided in spool bottom, to realize off-load and vibration-damping function, avoid the influence in the prior art when processing unloading port on spool the first 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 institute
The spool in valve bonnet is stated, the outer surface of the valve bonnet is threadedly coupled with the piston only, the spool and the piston only
Elasticity is connected, and the valve bonnet is provided with conduction hole, and the valve core housing is set in the conduction hole, the spool and the conduction hole
Clearance fit is with the oil liquid that circulates；The valve bonnet is further provided with guiding blind hole, and the inner bottom surface of the guiding blind hole draws with described
Discharge orifice connection, the spool is further sheathed in the guiding blind hole, the spool and the guiding blind hole clearance fit with
Closing oil path；Being provided on the outer surface that the spool is matched with the guiding blind hole can be connected to below the spool and drain
The compensating groove of oil liquid in hole, radially indent is arranged for the bottom surface of the compensating groove.
Preferably, the spool is further provided with the shoulder that can be matched with the guiding blind hole with closing oil path,
The surface of the shoulder towards the conduction hole is bonded with the inner bottom surface of the guiding blind hole.
Preferably, the spool is further provided with tapered portion, the tapered portion is sheathed in the conduction hole, described
Tapered portion and the conduction hole clearance fit are with the oil liquid that circulates.
Preferably, the spool is provided with the second throttle orifice away from one end of the spring, the spool it is relatively another
One end is provided with third blind hole, and second throttle orifice is connected with the third 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 set to 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, piston described in circumferentially distributed of the valve component along the piston only at the top of the piston only
The valve component of body bottom portion is circumferentially distributed along the piston only.
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, valve component of the invention is being provided with compensating groove on spool, and oil liquid passes sequentially through above the piston only
Even number conduction hole, compensating groove and outlet realize off-load and vibration-damping function, avoid in the prior art in the spool first
Influence when processing unloading port on blind hole side wall to the geometric tolerance between the valve bonnet and spool, ensure that the valve bonnet and valve
Cooperation precision between core, and then make 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 flow through between the conduction hole and the spool
Access, the shoulder top surface and it is described guiding blind hole inner bottom surface between access when, be to flow uniformly through in a circumferential direction,
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
Improve 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
Drain internal surface of hole between 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, second throttle orifice are set to the top of the spool, and in the prior art
First segment discharge orifice is compared, not only easy to process, but also will not influence the valve core outer surface and the through-hole inner surface when processing
Cooperation precision.
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 valve core structure schematic diagram of the present invention；
Fig. 5 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, conduction hole；222, it is oriented to blind hole；23, spool；231, platform
Shoulder；232, compensating groove；234, the second throttle orifice；235, third 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 direction reduced towards radius are inside, otherwise are outside；The inner bottom surface of guiding blind hole refers to perpendicular to axial direction
Inner surface；The bottom surface of compensating groove refers to the inner surface perpendicular to two parallel inners；Term "top", "bottom" "inner", "outside",
The orientation or positional relationship of the instructions such as "upper", "lower", "front", "rear" is based on attached drawing 2 and attached positional relationship shown in Fig. 3, only
It is that for the convenience of describing the present invention and simplifying the description, rather than the device or element of indication or suggestion meaning must have specifically
Orientation is constructed and operated in a specific orientation, therefore is not considered as limiting the invention.In addition, term " first ", " the
Two " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative 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 reach effectiveness in vibration suppression, 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 spool 23 is sheathed on institute
State inside valve bonnet 22, the spool 23 and 21 elastic connection of piston only, i.e., described 23 bottom of spool by spring 24 with
21 bottom of the piston only connection, the spool 23 can move up and down under the action of spring 24；Specifically, the valve
Cover 22 is axially provided with guiding blind hole 222 towards one end of the spring 24, and the valve bonnet 22 deviates from one end of the spring 24
It is axially provided with conduction hole 221, the conduction hole 221 is connected with guiding blind hole 222, and the spool 23 successively covers from the bottom to top
In the guiding blind hole 222 and conduction hole 221, wherein the interior table of the outer surface of the spool 23 and the conduction hole 221
Face clearance fit is to form the access that oil liquid can be made to pass through, the interior table of the outer surface of the spool 23 and the guiding blind hole 222
Face premise clearance fit, the precision of the clearance fit meet the function of accurate Pilot poppet movement and closing oil path；The spool
The compensating groove 232 of negotiable oil liquid, the compensating groove 232 are provided on 23 outer surfaces matched with the guiding blind hole 222
Bottom surface it is radially inwardly extending, can be connected to the conduction hole 221 on the compensating groove 232, under the compensating groove 232
It is square be connected to below the spool 23；The bottom surface of the piston only 21 position corresponding with the spool 23 is provided with discharge
The oil liquid of mouth 211,23 bottom of spool is connected by the outlet 211 with the oil liquid of 21 lower section of piston only；
When the spring 24 compression, the spool 23 can be driven to transport downwards along the axis direction of conduction hole 221 and guiding blind hole 222
It is dynamic, thus make the oil liquid of 21 top of piston only pass sequentially through the conduction hole 221, compensating groove 232 and outlet 211 with
The oil liquid of 21 lower section of piston only is connected, and then realizes off-load and vibration-damping function.
Valve component of the invention is arranged on outer surface of the spool 23 with guiding 222 clearance fit of blind hole
The oil liquid of compensating groove 232,21 top of piston only passes sequentially through the conduction hole 221, compensating groove 232 and outlet 211
It realizes off-load and vibration-damping function, need to only clamp the bottom end of the spool 23 when processing the compensating groove 232, be not at this
With the mating surface of the valve bonnet 23, and then the geometric tolerance of the spool 23 and valve bonnet 22 will not influence, make valve body group of the present invention
Part has stable quality and precision property.
With continued reference to Fig. 3, as shown in figure 3, the spool 23 be further provided with can closing oil path shoulder 231, adjust
The pretightning force of the spring 24, so that the shoulder 231 is blind away from the surface (i.e. upper surface) of the spring 24 and the guiding
The inner surface (i.e. perpendicular to axial inner bottom surface) of hole 222 towards the spring 24 is bonded, to prevent the conduction hole 221 and institute
The oil liquid stated between spool 23 is connected to the oil liquid in the compensating groove 232.
Specifically, when initial position, oil liquid pressure above and below the piston only 21 balance, the spool 23 with
Oil liquid between the conduction hole 221 is connected with the oil liquid of 21 top of piston only, the upper surface of the shoulder 231 with
The inner bottom surface of the guiding blind hole 222 is matched with closing oil path, and the oil liquid in the compensating groove 232 is by passing through the discharge
Mouth 211 is connected to the oil liquid of 21 lower section of piston only；When the piston only 21 moves upwards, the piston only 21
The oil liquid pressure of top increases, and the oil liquid of 21 top of piston only oppresses the spool 23 and spring 24 and makes the spring
24 compressions, the spring 24 drive the spool 23 to move downward along the axis direction of conduction hole 221 and guiding blind hole 222, institute
It states shoulder 231 to separate with 222 inner bottom surface of guiding blind hole, so that the oil liquid of 21 top of piston only passes through the conduction hole
Access between 221 inner surface outer surfaces and the spool 23 flow into the shoulder 231 and 222 inner bottom surface of guiding blind hole it
Between access, to be connected to the oil liquid in the compensating groove 232, and flow into the piston eventually by the outlet 211
21 lower section of ontology, makes the oil liquid pressure above and below the piston only 21 balance each other, reaches off-load and effectiveness in vibration suppression；Work as institute
When stating 21 stop motion of piston only, the restoring force of the spring 24 moves upwards the spool 23, makes the shoulder 231
Upper surface is bonded again with the inner bottom surface of the guiding blind hole 222, so that oil circuit be made to close again.
It should be noted that in the prior art, needing to clamp the spool 13 and the valve when processing the unloading port 132
The outer surface that cover 12 matches, inevitably impacts the geometric tolerance of 13 mating surface of the valve bonnet 12 and spool,
And then influence the quality and precision of valve component and oil-pressure damper.
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 conduction hole 221 and the spool
It is in circumference side when access between access, 231 top surface of the shoulder between 23 and guiding 222 inner bottom surface of blind hole
It flows uniformly through upwards, the radial force that the oil liquid generates the spool 23 is cancelled out each other, and the part of the spool 23 is avoided
Stress fatigue further increases the quality and service life of valve component of the present invention.
Referring to Fig. 3 and Fig. 4, as shown in Figure 3 and Figure 4, the compensating groove 232 is set to the spool 23 and the guiding is blind
On the outer surface that hole 222 matches, the compensating groove 232 is matched with the inner surface of the guiding blind hole 222 to form oil liquid
Access, because the spool 23 and the guiding blind hole 222 are the premise clearance fit of closing oil path, the oil liquid can only pass through institute
Compensating groove 232 is stated to flow through, improve the quality stability of valve component and oil-pressure damper of the present invention.
Further, the compensating groove 232 may be configured as one or more, be wanted with the off-load and vibration damping that meet different
It asks.When the compensating groove 232 is multiple, in order to make in unloading process oil liquid circulation uniformly, the multiple compensating groove 232 is along circle
Circumferential direction is uniformly distributed on the outer surface of the spool 23.
With continued reference to Fig. 3, as shown in figure 3, the spool 23 is further provided with tapered portion 233,233 sets of the tapered portion
In the conduction hole 221, oil liquid is formed between the outer surface of the tapered portion 233 and the inner surface of the conduction hole 221
Access, and be connected to the oil liquid of 21 top of piston only, so as to flow through the oil liquid of 21 top of piston only.Institute
The tip for stating tapered portion 233 is arranged away from the spring 24 and guiding blind hole 222, i.e., when the spool 23 moves downward, institute
The oil liquid area of passage stated between 221 inner surface of 233 outer surface of tapered portion and the conduction hole gradually increases, to make to flow at this
The oil liquid amount crossed gradually increases, and makes due to even if avoiding the oil liquid amount for circulating more at this when the spool 23 just moves downward
The case where at moment off-load, 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 233 appearance of tapered portion
Oil liquid access face between 221 inner surface of face and the conduction 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 spool 23 is axially provided with the second section away from one end of the spring 24
The opposite other end (towards one end of the spring 24) of discharge orifice 234, the spool 23 is axially provided with third blind hole 235, institute
The second throttle orifice 234 is stated to be connected with the third blind hole 235.When the piston only 21 generate it is subtle move upwards, i.e.,
The oil liquid pressure of 21 top of piston only has increased slightly, and the oil liquid pressure is not enough to overcome the elastic force of the spring 24
When, the oil liquid of 21 top of piston only can be flowed into the third blind hole 235 by second throttle orifice 234, and be led to
The outlet 211 crossed on the piston only 21 flows into 21 lower section of piston only, to reach 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 diameter of the first blind hole 131 of the spool 13
To being provided with first segment discharge orifice 133, the first segment discharge orifice 133 by first blind hole 131 oil liquid and the piston sheet
The oil liquid connection of the lower section of body 11, when the piston only 11 generate it is subtle when moving upwards, 11 top of piston only
Oil liquid can pass sequentially through first blind hole 131 and first segment discharge orifice 133 flows into 11 lower section of piston only, to realize off-load and subtract
Vibration effect.But because the first segment discharge orifice 133 is located at the bottom surface of first blind hole 132, processing is inconvenient, and is processing
When the first segment discharge orifice 133, need to clamp the outer surface that the spool 13 is matched with 12 through-hole 121 of valve bonnet, no
It will affect the cooperation precision of 13 outer surface of spool Yu 121 inner surface of through-hole avoidablely.
Further, valve component of the invention is led to by the way that the second throttle orifice 234 is arranged on the top of the spool 23
Cross second throttle orifice 234 makes the oil liquid of 21 upper and lower of piston only be connected with third blind hole 235, second section
The top of the spool 23 is arranged in discharge orifice 234, not only easy to process, but also when processing second throttle orifice 234, only needs
The outer surface of 23 least significant end of spool is clamped, the outer surface at this is non-matching surface, and then will not influence this hair
The cooperation precision of bright valve component, further improves the quality of valve component of the present invention and the stability of precision.
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. 5, as shown in figure 5, 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. 5, as shown in figure 5, 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 spool 23 for oppressing the 21 top body component of piston only moves downward, and the spool 23 wants the piston only 21
The spring 21 of top body component compresses, to make 23 shoulder of spool, 231 top surface and 222 inner bottom surface of guiding blind hole point
From the oil liquid of 21 top of piston only passes sequentially through channel between the tapered portion 233 and conduction hole 221, shoulder 231 pushes up
Face and 222 inner bottom surface of guiding blind hole, compensating groove 232 and outlet 211 flow into 21 lower section of piston only, realize off-load
And effectiveness in vibration suppression.In multiple valve components at 21 top of piston only, set at the top of one or more spool 23
The second throttle orifice 234 is set, the increase of 21 top oil liquid pressure of piston only caused by the piston only 21 moves upwards is not
When being enough compressed spring 21, the 21 top oil liquid of piston only passes sequentially through second throttle orifice 234, third blind hole 235
21 lower section of piston only is flowed into outlet 211, 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
It oppresses the 21 bottom body component spool 23 of piston only to rise, the spool 23 oppresses 21 bottom of piston only
The spring 21 of valve component compresses, thus separate 23 shoulder of spool, 231 bottom surface with 222 inner bottom surface of guiding blind hole,
The oil liquid of 21 lower section of piston only passes sequentially through channel between tapered portion 233 and conduction hole 221,231 top surface of shoulder and institute
It states guiding 222 inner bottom surface of blind hole, compensating groove 232 and outlet 211 and flows into 21 top of piston only, realize off-load and vibration damping
Effect.In multiple valve components of 21 bottom of piston only, one or more 23 bottom of spool setting second
Throttle orifice 234, the increase of 21 lower section oil liquid pressure of piston only caused by the piston only 21 moves downward are not enough to press
When contracting spring 21, the 21 lower section oil liquid of piston only passes sequentially through second throttle orifice 234, third blind hole 235 and discharge
Mouth 211 flows into 21 top of piston only, to realize off-load and effectiveness in vibration suppression.
It should be noted that because 21 top surface of piston only is provided with piston rod, 21 top of piston only
Spatial volume is less than the spatial volume of 21 lower section of piston only, and therefore, the piston only 21 is right caused by moving upwards
The value added of 21 top oil liquid pressure of piston only, moves downward caused by same displacement with the piston only 21 to piston sheet
The value added of 21 lower section oil liquid pressure of body is simultaneously unequal, and then leads to 21 decrement of spring and the institute of 21 top surface of piston only
State 21 decrement of spring of 21 bottom surface of piston only and unequal.In order to make piston unit of the invention reach bidirectional damper power phase
Deng effect, the spring 21 that 21 pretightning force of spring of 21 top surface of piston only is less than 21 bottom surface of piston only pre-tightens
Power.
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 (9)
1. a kind of valve component is set on the piston only (21) of oil-pressure damper, including valve bonnet (22) and movably cover
Spool (23) and spring (24) in the valve bonnet (22), the outer surface of the valve bonnet (22) and the piston only
(21) it is threadedly coupled, the spool (23) is connected with the piston only (21) elasticity, and spool (23) bottom passes through described
Spring (24) is connect with the piston only (21) bottom, and the valve bonnet (22) is provided with conduction hole (221), the spool (23)
It is sheathed in the conduction hole (221), it is characterised in that: the spool (23) is with the conduction hole (221) clearance fit to flow
Logical oil liquid；
The valve bonnet (22) is further provided with guiding blind hole (222), the inner bottom surface of guiding blind hole (222) and the drainage
Hole (221) connection, the spool (23) are further sheathed in the guiding blind hole (222), and the spool (23) is led with described
To blind hole (222) clearance fit with closing oil path；
Being provided on the outer surface that the spool (23) matches with guiding blind hole (222) can be connected under the spool (23)
The compensating groove (232) of oil liquid in side and conduction hole (221), radially indent is arranged for the bottom surface of the compensating groove (232).
2. valve component according to claim 1, it is characterised in that: the spool (23) be further provided with can with it is described
Guiding blind hole (222) is matched with the shoulder of closing oil path (231), table of the shoulder (231) towards the conduction hole (221)
Face is bonded with the inner bottom surface of guiding blind hole (222).
3. valve component according to claim 1, it is characterised in that: the spool (23) is further provided with tapered portion
(233), the tapered portion (233) is sheathed in the conduction hole (221), the tapered portion (233) and the conduction hole (221)
Clearance fit is with the oil liquid that circulates.
4. valve component according to claim 1, it is characterised in that: the spool (23) deviates from the one of the spring (24)
End is provided with the second throttle orifice (234), and the opposite other end of the spool (23) is provided with third blind hole (235), and described second
Throttle orifice (234) is connected with the third blind hole (235).
5. 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 according to any one of claims 1-4 on (21).
6. piston unit according to claim 5, it is characterised in that: the valve component is set to the piston only
(21) top and bottom.
7. piston unit according to claim 6, 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.
8. piston unit according to claim 7, it is characterised in that: the valve component edge at the top of the piston only (21)
The valve component of piston only (21) bottom is along the piston only (21) described in the circumferentially distributed of the piston only (21)
It is circumferentially distributed.
9. a kind of oil-pressure damper, including working cylinder, it is characterised in that: setting is appointed just like claim 5-8 in the working cylinder
Piston unit described in one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710525562.1A CN107091295B (en) | 2017-06-28 | 2017-06-28 | Valve component, piston unit and oil-pressure damper |
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| CN107091295B true CN107091295B (en) | 2019-03-29 |
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| CN110905962B (en) * | 2019-11-29 | 2022-02-01 | 中国北方车辆研究所 | Hydro-pneumatic spring with annular damping valve |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005195046A (en) * | 2003-12-26 | 2005-07-21 | Hitachi Ltd | Cylinder device |
| CN203009686U (en) * | 2012-12-07 | 2013-06-19 | 常州朗锐凯迩必减振技术有限公司 | Overflow valve used for oil damper |
| CN203348405U (en) * | 2013-06-18 | 2013-12-18 | 青岛阿尔斯通铁路设备有限公司 | Novel damper with variable damping |
| CN203847616U (en) * | 2014-04-15 | 2014-09-24 | 叶晓锋 | Hydraulic damping structure |
| CN205064679U (en) * | 2015-09-18 | 2016-03-02 | 珠海市业成轨道交通设备科技有限公司 | Hydraulic shock absorber's piston unit for rail locomotive vehicle |
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2017
- 2017-06-28 CN CN201710525562.1A patent/CN107091295B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005195046A (en) * | 2003-12-26 | 2005-07-21 | Hitachi Ltd | Cylinder device |
| CN203009686U (en) * | 2012-12-07 | 2013-06-19 | 常州朗锐凯迩必减振技术有限公司 | Overflow valve used for oil damper |
| CN203348405U (en) * | 2013-06-18 | 2013-12-18 | 青岛阿尔斯通铁路设备有限公司 | Novel damper with variable damping |
| CN203847616U (en) * | 2014-04-15 | 2014-09-24 | 叶晓锋 | Hydraulic damping structure |
| CN205064679U (en) * | 2015-09-18 | 2016-03-02 | 珠海市业成轨道交通设备科技有限公司 | Hydraulic shock absorber's piston unit for rail locomotive vehicle |
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| CN107091295A (en) | 2017-08-25 |
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