CN106870499A - A kind of damping buffering valve - Google Patents
A kind of damping buffering valve Download PDFInfo
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- CN106870499A CN106870499A CN201710294246.8A CN201710294246A CN106870499A CN 106870499 A CN106870499 A CN 106870499A CN 201710294246 A CN201710294246 A CN 201710294246A CN 106870499 A CN106870499 A CN 106870499A
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- damping
- bolt
- valve
- oil return
- hydraulic control
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
- F15B13/042—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B20/00—Safety arrangements for fluid actuator systems; Applications of safety devices in fluid actuator systems; Emergency measures for fluid actuator systems
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Details Of Valves (AREA)
- Safety Valves (AREA)
Abstract
The invention discloses a kind of damping buffering valve, including valve body, valve element and elastomer, the damping buffering valve can realize overload buffer in the case where braking distance and braking time is taken into account, it is the trimmer valve simple structure, preferable to environmental suitability, and cost is relatively low, traditional Two relief valve can be effectively overcome to pressure swing adsorption scarce capacity, complex structure；The shortcoming that electro-hydraulic proportional valve adaptability for working condition is poor, price is high.It is easy to be widely used in the complicated farm machinery hydraulic buffer system of work condition environment, its applicability improves a lot compared to existing buffer system tool.
Description
Technical field
The invention belongs to engineering and farm machinery hydraulic cushion element design field, and in particular to a kind of hydraulic control damping in parallel
Trimmer valve.
Background technology
Engineering machinery and farm machinery in starting and braking and load mutation process, due to hydraulic system executive component and its
The load of driving has larger inertia, executive component can be made to continue to move so that executive component brake chamber pressure in hydraulic system
Power mutation produces hydraulic shock vibration and noise, oil suction chamber easily to produce the negative pressure to cause air pocket and pressure to the several times of operating pressure
Fluctuation, causes fluid pressure line and Hydraulic Elements to damage and reduces service life.To solve problems, it is necessary in engineering and agriculture
The buffer system of load changing is prevented with being set in machinery hydraulic system.It is in current engineering and farm machinery hydraulic system to use more
Two relief valve and the integrated banked direction control valves of unidirectional Fill valve are connected in parallel on hydraulic actuator（Motor, hydraulic cylinder）Two ends, in starting and braking
During high pressure chest partial high pressure fluid released by overflow valve prevent overload pressure to be mutated, low pressure chamber is anti-by check valve repairing
The only generation of negative pressure air pocket.In recent years, some required precisions occasion higher, also begins to improve hydraulic pressure using electro-hydraulic proportional valve
The starting and braking performance of executive component.
Overflow valve and the integrated banked direction control valves of check valve, general provision are used in actual applications：" the setting of buffer overflow valve
, there is pressure overshoot in pressure 5%~10% " higher than the rated operating pressure of system, when being worked due to overflow valve so in overflow
Before the valve port opening of valve in a flash, the pressure peak in system can typically exceed more than the 30% of system nominal pressure.Overflow valve system
Dynamic buffer loop is respectively to set a set of overflow valve and check valve on two oil circuits of system working connection to complete executive component two
Braking in the individual direction of motion, so makes the cumbersome installation and maintenance for being not easy to system of system complex, and relatively costly, to pressure
The absorbability of fluctuation is limited.
Improve the starting and braking impact of performance of hydraulic actuator using electro-hydraulic proportional valve preferably, but it has price
It is high, poor to working environment adaptability, need the deficiencies such as related electric-control system, be not suitable for some to required precision not
The farm machinery occasion that high, operating mode is complicated, cost performance requirement is high.
Therefore, being applicable for buffer system that load changing is prevented in engineering and farm machinery hydraulic system how is improved
Property, it is the technical problem of current those skilled in the art's urgent need to resolve.
The content of the invention
In order to solve the above technical problems, preventing load in engineering and farm machinery hydraulic system the invention provides one kind
The buffer system of mutation, the buffer system is a kind of damping buffering valve, in the case of the braking distance and braking time taken into account
Overload buffer is capable of achieving, it is the trimmer valve simple structure, preferable to environmental suitability, and cost is relatively low, can effectively overcome biography
System Two relief valve is to pressure swing adsorption scarce capacity, complex structure；Electro-hydraulic proportional valve adaptability for working condition is poor, price is high lacks
Point.It is easy to be widely used in the complicated farm machinery hydraulic buffer system of work condition environment, its applicability is compared to existing buffering
System tool improves a lot.
In order to realize above-mentioned technical purpose, the invention provides a kind of damping buffering valve, including valve body, valve element and elasticity
Body；The first hydraulic control that can be attached with exterior line mouthful, the second hydraulic control mouthful, main oil inlet are offered on the valve body and is led back
Hydraulic fluid port, the valve inner is provided with core duct, first hydraulic control mouthful and second hydraulic control mouth respectively with the core hole
The two ends connection in road, the main oil inlet, main oil return opening are connected with the middle part in the core duct；The valve element is placed in the core
In portion duct, can be moved left and right along the bearing of trend in the core duct, the valve element is connected with the core duct,
And two mutual disconnected first annular seal spaces and the second annular seal space are formed, two ends at least one end of the valve element is provided with the elasticity
Body, the two ends of the valve element communicate with first hydraulic control mouthful and second hydraulic control mouthful respectively；The valve element have left position, in
Position, the working position of right position three；When first hydraulic control mouthful and the intraoral medium differential pressure of second hydraulic control are less than the elastomer
Elastic force when, the valve element is located at middle position, and now described main oil inlet connect with the first annular seal space, the main oil return opening and
The second annular seal space connection, but do not connected between the main oil inlet and the main oil return opening；When first hydraulic control mouthful
When pressure medium is more than the elastic force of the elastomer more than the pressure medium and both pressure differentials of second hydraulic control mouthful, the valve
Core is promoted by the medium in first hydraulic control mouthful, and the valve element is moved to right, into right position, now described main oil inlet and the master
Oil return opening is connected with the first annular seal space；As the Jie of the pressure medium more than first hydraulic control mouthful of second hydraulic control mouthful
Matter pressure and both pressure differentials more than the elastomer elastic force when, the valve element is pushed away by the medium in second hydraulic control mouthful
Dynamic, the valve element is moved to left, and into left position, now described main oil inlet and the main oil return opening connect with second annular seal space
It is logical.
On the basis of above-mentioned technical proposal, the present invention can also make improvement further below.
Further, the damping buffering valve also enters oil damping bolt and one or more oil returns damping including one or more
Bolt, the valve body is provided with bolt hole, it is described enter oil damping bolt and oil return damping bolt be mounted on the bolt hole
In；It is described enter oil damping bolt and the oil return damping bolt be respectively provided with annular groove, groove hole and damping hole；The annular groove edge
It is described enter oil damping bolt and the oil return damping bolt side wall circumferentially open up；The groove hole is opened in the annular groove
It is interior, and along it is described enter oil damping bolt and the oil return damp the radial direction insertion of bolt；The damping hole is to be hindered along the oil-feed
The elongate slot that opens up of axial direction of Buddhist nun's bolt and oil return damping bolt, its one end be communicated in it is described enter oil damping bolt and institute
The end that oil return damps bolt is stated, the other end is connected with the groove hole and then is communicated in the annular groove；The main oil inlet
And the main oil return opening respectively with it is described enter oil damping bolt and the oil return damping bolt annular groove respectively be connected,
And by the damping hole and the core hole link.
Further, it is described enter oil damping bolt and the oil return damping bolt be respectively two, and two oil-feeds
Damping bolt and two oil returns damp axisymmetrical of the bolts respectively about the core duct.
Further, it is described enter oil damping bolt and the oil return damping bolt and the valve body on the bolt hole screw thread
Connection.
Further, the valve element is cylindrical structure, and the side of the valve element is circumferentially spaced, and to offer two annulars recessed
Groove, two annular grooves form the first annular seal space and second annular seal space with the valve body.
Further, the elastomer is two, is respectively arranged on the two ends of the valve element.
Further, the core duct is through hole, and a duct end cap, two are respectively mounted at the two ends in the core duct
The individual elastomer is separately positioned between two duct end caps and two end faces of valve element.
Further, one end of the duct end cap is groove type structure, and the inside of the groove type structure is by located at institute
Multiple radial direction through hole that duct end cap sidewalls open up are stated to be connected with first hydraulic control mouthful or second hydraulic control mouthful.
Further, the valve body is rectangular structure.
Further, the elastomer is spring.
The beneficial effects of the invention are as follows：
1st, a kind of damping buffering valve provided by the present invention is only made up of a small amount of parts such as valve body, valve element and elastomer,
Therefore simple structure, manufacturing cost is relatively low, and installation is convenient to.
2nd, by way of two are entered oil damping bolt and two oil returns damp bolt difference parallel connection, machine can be greatly improved
The accommodation of tool system, can apply under various working.
3rd, using valve element liquid controlled reversing, it is to avoid the limitation of solenoid directional control valve spool stroke and valve port opening.
4th, opening for trimmer valve can be set by choosing the spring or design valve element and the valve body lap of splice of different-stiffness
The size of pressure and throttling spool area is opened, high with flexibility, Opening pressure overshoot is more much smaller than the buffering of overflow valve composition
The advantage of road valve.
5th, enter oil damping bolt using two and two oil return damping bolts are in parallel respectively, the knot of oil inlet and outlet damped series
Structure causes that valve element has more preferable inhibitory action to pressure jump, advantageously in engineering machinery or the buffering of farm machinery, protects
Protecting system is not hit, and improves service life.
Brief description of the drawings
Fig. 1 is a kind of cross-section structure of the specific embodiment of damping buffering valve provided by the present invention, while the valve
Core is located at schematic diagram during middle position；
Fig. 2 be along Fig. 1 C-C to schematic cross-sectional view；
Fig. 3 be along Fig. 1 D-D to schematic cross-sectional view；
Fig. 4 is the disassemblying structure schematic diagram of Fig. 1 illustrated embodiments；
Fig. 5 enters a kind of the vertical of specific embodiment of oil damping bolt or oil return damping bolt described in shown in Fig. 1
Body structural representation；
Fig. 6 is a kind of dimensional structure diagram of specific embodiment of the duct end cap shown in Fig. 1；
Fig. 7 be the valve element be located at right position when schematic cross-sectional view；
Fig. 8 be the valve element be located at left position when schematic cross-sectional view；
Fig. 9 is the schematic diagram that a kind of damping buffering valve provided by the present invention is connected to a kind of specific embodiment in hydraulic system.
Wherein：1st, valve body, 2, valve element, 3, enter oil damping bolt, 4, oil return damping bolt, 5, core duct, 6, bolt hole,
7th, elastomer, 8, duct end cap, 9, oil-feed duct, 10, oil return duct, 11, annular groove, 12, damping hole, 13, groove hole, 14,
Screw thread, 81, groove type structure, 82, radial direction through hole；
A, the first hydraulic control mouthful, B, the second hydraulic control mouthful, P, main oil inlet, T, main oil return opening, E, first annular seal space, F, the second sealing
Chamber；
100th, hydraulic cylinder, 101, hydraulic cylinder oil inlet, 102, hydraulic cylinder oil return opening, 201, main oil inlet pipe road, 202, main oil return pipe
Road.
Specific embodiment
In order that those skilled in the art more fully understand the present invention program, with reference to the accompanying drawings and detailed description
The present invention is described in further detail.
Fig. 1 to Fig. 9 is refer to, Fig. 1 is a kind of section of the specific embodiment of damping buffering valve provided by the present invention
Structure, while the schematic diagram when valve element is positioned at middle position；Fig. 2 be along Fig. 1 C-C to schematic cross-sectional view；Fig. 3 is along Fig. 1
D-D is to schematic cross-sectional view；Fig. 4 is the disassemblying structure schematic diagram of Fig. 1 illustrated embodiments；Fig. 5 is the oil-feed shown in Fig. 1
A kind of dimensional structure diagram of the specific embodiment of damping bolt or oil return damping bolt；Fig. 6 is shown in Fig. 1
A kind of dimensional structure diagram of the specific embodiment of the duct end cap；Fig. 7 be the valve element be located at right position when section view
Schematic diagram；Fig. 8 be the valve element be located at left position when schematic cross-sectional view；Fig. 9 is a kind of damping buffering valve provided by the present invention
A kind of schematic diagram of the specific embodiment being connected in hydraulic system.
In a kind of specific embodiment of damping buffering valve provided by the present invention, including valve body 1, valve element 2 and elasticity
Body 7；Elastomer 7 can be the cushion pad with Telescopic, rubber blanket etc., or spring, preferably spring, because spring
It is easier to control cushion effect, is relatively easy to install, cost is relatively low.Being offered on the valve body 1 can be carried out with exterior line
The first hydraulic control mouthful A, the second hydraulic control mouthful B, main oil inlet P and the main oil return inlet T for connecting, are provided with core duct inside the valve body 1
The two ends of 5, the first hydraulic control mouthful A and second hydraulic control mouthful B respectively with the core duct 5 connect, the main oil inlet
P, main oil return inlet T are connected with the middle part in the core duct 5；The valve element 2 is placed in the core duct 5, can be along described
The bearing of trend in core duct 5 is moved left and right, and the valve element 2 is connected with the core duct 5, and formation two does not connect mutually
Logical first annular seal space E and the second annular seal space F.
The two ends of the valve element 2 at least one end is provided with the elastomer 7, if set at one end, that is, is necessary to ensure that the bullet
Gonosome 7 can either be stretched and can be compressed, and to ensure valve element 2 when being moved to both direction, can be entered by elastomer 7
Row resets, and in the present invention, the elastomer 7 is preferably two, is respectively arranged on the two ends of the valve element 2.Valve element can so be made
Two ends be symmetrical structure, be easily controlled pressure balance, also easily install implement.
The two ends of the valve element 2 communicate with first hydraulic control mouthful A and second hydraulic control mouthful B respectively；The valve element 2 has
Zuo Wei, middle position, the working position of right position three；When the medium differential pressure in first hydraulic control mouthful A and second hydraulic control mouthful B is less than institute
When stating the elastic force of elastomer 7, the valve element 2 is located at middle position, and now described main oil inlet P is connected with the first annular seal space E, institute
State main oil return inlet T to be connected with the second annular seal space F, but do not connected between the main oil inlet P and the main oil return inlet T；When
Pressure medium and both pressure differentials of the pressure medium of the first hydraulic control mouthful A more than second hydraulic control mouthful B are more than the bullet
During the elastic force of gonosome 7, the valve element 2 is promoted by the medium in first hydraulic control mouthful A, and the valve element 2 is moved to right, into right position,
Now described main oil inlet P and the main oil return inlet T are connected with the first annular seal space E；As Jie of second hydraulic control mouthful B
When pressure medium and both pressure differentials of the matter pressure more than first hydraulic control mouthful A are more than the elastic force of the elastomer 7, the valve
Core 2 is promoted by the medium in second hydraulic control mouthful B, and the valve element 2 is moved to left, into left position, now described main oil inlet P and institute
Main oil return inlet T is stated to be connected with the second annular seal space F.
In order to preferably suppress due in hydraulic system the pressure jump of executive component brake chamber produce hydraulic shock vibration and
Noise, the damping buffering valve also enters oil damping bolt 3 and one or more oil returns damping bolt 4, institute including one or more
State valve body 1 and be provided with bolt hole 6, it is described enter oil damping bolt 3 and oil return damping bolt 4 be mounted in the bolt hole 6.
Enter oil damping bolt 3 and the oil return damping structure of bolt 4 is identical, by the bolt hole 6 that screw thread 14 is installed.It is described enter
Oil damping bolt 3 and oil return damping bolt 4 are respectively provided with annular groove 11, groove hole 13 and damping hole 12；The annular groove 11
The side wall for entering oil damping bolt 3 and oil return damping bolt 4 described in is circumferentially opened up；The groove hole 13 is opened in the ring
In shape groove 11, and along it is described enter oil damping bolt 3 and the oil return damp the radial direction insertion of bolt 4；The damping hole 12 is edge
It is described enter oil damping bolt 3 and oil return damping bolt 4 the elongate slot that opens up of axial direction, its one end is communicated in the oil-feed
Damping bolt 3 and the oil return damp the end of bolt 4, and the other end is connected with the groove hole 13 and then is communicated in the annular
Groove 11；The main oil inlet P and the main oil return inlet T respectively with it is described enter oil damping bolt 3 and the oil return damping 4 points of bolt
Other annular groove 11 is connected, and is connected with the core duct 5 by the damping hole 12.
In order to improve buffering effect, it is described enter oil damping bolt 3 and oil return damping bolt 4 be respectively two, and
Enter the axisymmetrical of oil damping bolt 3 and two oil return damping bolts 4 respectively about the core duct 5 described in two.
It is described enter oil damping bolt 3 and the oil return damping bolt 4 be preferably with the bolt hole 6 on the valve body 1
Threaded connection, so easily realizes sealing, it is to avoid oil liquid leakage.
The valve element 2 is cylindrical structure, and the side of the valve element 2 is circumferentially spaced to offer two annular grooves, two
The individual annular groove forms the first annular seal space E and the second annular seal space F with the valve body 1.
The core duct 5 is through hole, and a duct end cap 8, two institutes are respectively mounted at the two ends in the core duct 5
Elastomer 7 is stated to be separately positioned between two duct end caps 8 and two end faces of valve element 2.
One end of the duct end cap 8 is groove type structure 81, and the inside of the groove type structure 81 is by located at described
Multiple radial direction through hole 82 that the side wall of duct end cap 8 is opened up are connected with first hydraulic control mouthful A or described second hydraulic controls mouthful B.First
The position of hydraulic control mouthful A and second hydraulic control mouthful B is just right with radial direction through hole 82, can so enter the first hydraulic control mouth A or the
Fluid in two hydraulic controls mouthful B enters into the two ends of valve element using radial direction through hole 82, to promote valve element 2 to move.
The shape and structure of valve body 1 can as needed be designed, in general, in order to install and process with unrestricted
The convenience of manufacture, the valve body 1 can be designed as rectangular structure.First hydraulic control mouthful A and the second hydraulic control mouthful B are arranged on one
On face, main oil inlet P and main oil return inlet T are set on the other surface.It is understood that when actually used, can be according to need
Want the above-mentioned hydraulic fluid port position of unrestricted choice.
In order to illustrate the operation principle of the damping buffering valve of present invention offer, below by a reality for specific hydraulic system
Example is applied to be specifically addressed.
As described in Figure 9, it is that one kind that a kind of damping buffering valve provided by the present invention is connected in hydraulic system is embodied
The schematic diagram of example.In figure, hydraulic cylinder 100 accesses hydraulic system by main oil inlet pipe road 201 and main oil returning tube 202, wherein, it is main
Inflow pipeline 201 accesses hydraulic cylinder oil inlet 101, and main oil returning tube 202 accesses hydraulic cylinder oil return opening 102, meanwhile, institute of the present invention
The orifice valve of offer also accesses the hydraulic system, specifically, the first hydraulic control mouthful A is connected with the pipeline of main oil inlet pipe road 201, valve body 1
On main oil inlet P be also connected with the pipeline of main oil inlet pipe road 201；Second hydraulic control mouthful B is connected with the pipeline of main oil returning tube 202, valve
Main oil return inlet T on body 1 is also connected with the pipeline of main oil returning tube 202.Valve element 2 is controlled by the pressure difference of A, B two hydraulic controls mouthful
Displacement and orifice size.By four damping holes of damping bolt in parallel two-by-two come surge suppressing.
Specific work process is described as follows：When hydraulic cylinder 100 is in nominal situation, main oil inlet P passes through two parallel connections
The elongated damping hole 12 for entering oil damping bolt 3 connect with the first annular seal space E of annular, main oil return inlet T passes through two parallel connections
The elongated damping hole 12 of oil return damping bolt 4 is connected with the second annular seal space F of annular.When the rod chamber of hydraulic cylinder 100 and without bar
When pressure is not up to starting differential pressure, fluid is sealed in first annular seal space E by entering oil damping bolt 3 in main oil inlet P in chamber, main
Fluid damps bolt 4 and is sealed in the second annular seal space F by oil return in oil return inlet T, and fluid is in valve in main oil inlet P, main oil return inlet T
Isolation is under core 1 and the cooperation of valve body 2, as shown in Figure 1.
When pressure difference is less than Opening pressure, to low pressure side shifting, the valve element middle part shaft shoulder reduces the lap seal with valve body to valve element
Length, so as to the quick response when there is pressure jump.When the piston of hydraulic cylinder 100 inwardly retracts braking, due to main oil-feed
Mouth P is communicated with hydraulic cylinder oil inlet 101, and main oil inlet P pressure mutation occurs and raises, main oil return inlet T pressure reduction, in the first liquid
Control mouth A, the second hydraulic control mouthful B differential pressure action bottom spools are moved to right, as shown in fig. 7, when pressure difference reaches buffering valve opening pressure, four
Damping hole 12 is instantaneously connected, and now fluid is close by the damping hole 12, first for entering oil damping bolt 3 in parallel in main oil inlet P
Envelope chamber E, the damping hole 12 of oil return damping bolt 4 in parallel refill low pressure chamber.When the bigger trimmer valve of pressure difference the displacement of valve element 2 more
Greatly, orifice size is bigger, and trimmer valve through-current capability is stronger, and the purpose of surge suppressing is played by elongated damping hole, prevents
The pressure jump of brake chamber is impacted to system and produces the adverse consequences such as noise, and suppression is served by low pressure chamber repairing
The generation of air pocket.
When the piston of hydraulic cylinder 100 is braked under overhanging operating mode, due to main oil return inlet T and the phase of hydraulic cylinder oil return opening 102
Logical, there is mutation rising in pressure in main oil return inlet T, pressure reduction in main oil inlet P, simultaneously as the first hydraulic control mouthful A and hydraulic pressure
Cylinder oil inlet 101 is communicated, and the second hydraulic control mouthful B is communicated with hydraulic cylinder oil return opening 102, and oil liquid pressure is more than the in the second hydraulic control mouthful B
The pressure of one hydraulic control mouthful A, moves to left, the liquid when pressure difference reaches buffering valve opening pressure in the second hydraulic control mouthful B pressure effect bottom spools 2
The fluid of hydraulic cylinder oil return opening 102 of cylinder pressure 100 by the damping hole 12 of oil return damping bolt 4 in parallel, the second annular seal space F and
The damping hole 12 for entering oil damping bolt 3 of connection refills low pressure chamber, as shown in figure 8, equally, under such conditions also by elongated
Damping hole plays the purpose of surge suppressing, prevents the pressure jump of brake chamber from being impacted to system and producing noise etc. no
Good consequence, the generation of air pocket is suppressed by being served to low pressure chamber repairing.
A kind of damping buffering valve provided by the present invention is described in detail above.Specific case used herein
Principle of the invention and implementation method are set forth, the explanation of above example is only intended to help and understands side of the invention
Method and its core concept.It should be pointed out that for those skilled in the art, not departing from the principle of the invention
Under the premise of, some improvement and modification can also be carried out to the present invention, these are improved and modification also falls into the claims in the present invention
In protection domain.
Claims (10)
1. a kind of damping buffering valve, it is characterised in that including valve body（1）, valve element（2）And elastomer（7）；
The valve body（1）On offer the first hydraulic control that can be attached with exterior line mouthful（A）, the second hydraulic control mouthful（B）, it is main enter
Hydraulic fluid port（P）And main oil return opening（T）, the valve body（1）Inside is provided with core duct（5）, first hydraulic control mouthful（A）And described
Two hydraulic controls mouthful（B）Respectively with the core duct（5）Two ends connection, the main oil inlet（P）, main oil return opening（T）With it is described
Core duct（5）Middle part connection；
The valve element（2）It is placed in the core duct（5）It is interior, can be along the core duct（5）Bearing of trend move left and right,
The valve element（2）With the core duct（5）It is connected, and forms two mutual disconnected first annular seal spaces（E）And second
Annular seal space（F）, the valve element（2）Two ends at least one end be provided with the elastomer（7）, the valve element（2）Two ends respectively with
First hydraulic control mouthful（A）With second hydraulic control mouthful（B）Communicate；
The valve element（2）There are left position, middle position, the working position of right position three；
When first hydraulic control mouthful（A）And second hydraulic control mouthful（B）Interior medium differential pressure is less than the elastomer（7）Elastic force
When, the valve element（2）Positioned at middle position, now described main oil inlet（P）With the first annular seal space（E）Connection, the main oil return
Mouthful（T）With second annular seal space（F）Connection, but the main oil inlet（P）With the main oil return opening（T）Between do not connect；
When first hydraulic control mouthful（A）Pressure medium more than second hydraulic control mouthful（B）Pressure medium and both pressure differentials
More than the elastomer（7）Elastic force when, the valve element（2）By first hydraulic control mouthful（A）In medium promote, the valve element
（2）Move to right, into right position, now described main oil inlet（P）And the main oil return opening（T）With the first annular seal space（E）Even
It is logical；
When second hydraulic control mouthful（B）Pressure medium more than first hydraulic control mouthful（A）Pressure medium and both pressure differentials
More than the elastomer（7）Elastic force when, the valve element（2）By second hydraulic control mouthful（B）In medium promote, the valve element
（2）Move to left, into left position, now described main oil inlet（P）And the main oil return opening（T）With second annular seal space（F）Even
It is logical.
2. a kind of damping buffering valve according to claim 1, it is characterised in that the damping buffering valve also include one or
Multiple enters oil damping bolt（3）And one or more oil returns damping bolt（4）, the valve body（1）It is provided with bolt hole（6）, it is described
Enter oil damping bolt（3）Bolt is damped with the oil return（4）It is mounted on the bolt hole（6）In；
It is described enter oil damping bolt（3）And the oil return damping bolt（4）It is respectively provided with annular groove（11）, groove hole（13）And damping
Hole（12）；The annular groove（11）Enter oil damping bolt described in（3）And the oil return damping bolt（4）Side wall circumferentially open
If；The groove hole（13）It is opened in the annular groove（11）It is interior, and along it is described enter oil damping bolt（3）And the oil return damping
Bolt（4）Radial direction insertion；The damping hole（12）Be along it is described enter oil damping bolt（3）And the oil return damping bolt（4）
The elongate slot that opens up of axial direction, its one end be communicated in it is described enter oil damping bolt（3）And the oil return damping bolt（4）End
Portion, the other end and the groove hole（13）Connect and then be communicated in the annular groove（11）；
The main oil inlet（P）And the main oil return opening（T）Respectively with it is described enter oil damping bolt（3）And the oil return damping spiral shell
Bolt（4）The annular groove respectively（11）It is connected, and by the damping hole（12）With the core duct（5）Connection.
3. a kind of damping buffering valve according to claim 2, it is characterised in that it is described enter oil damping bolt（3）And it is described
Oil return damps bolt（4）Respectively two, and enter oil damping bolt described in two（3）And two oil return damping bolts
（4）Respectively about the core duct（5）Axisymmetrical.
4. a kind of damping buffering valve according to claim 3, it is characterised in that it is described enter oil damping bolt（3）And it is described
Oil return damps bolt（4）With the valve body（1）On the bolt hole（6）Threaded connection.
5. a kind of damping buffering valve according to claim 1, it is characterised in that the valve element（2）It is cylindrical structure, institute
State valve element（2）Side circumferentially spaced offer two annular grooves, two annular grooves and the valve body（1）Formed
The first annular seal space（E）And second annular seal space（F）.
6. a kind of damping buffering valve according to claim 5, it is characterised in that the elastomer（7）It is two, sets respectively
In the valve element（2）Two ends.
7. a kind of damping buffering valve according to claim 6, it is characterised in that the core duct（5）It is through hole, in institute
State core duct（5）Two ends be respectively mounted a duct end cap（8）, two elastomers（7）It is separately positioned on two institutes
State duct end cap（8）With valve element（2）Two end faces between.
8. a kind of damping buffering valve according to claim 7, it is characterised in that the duct end cap（8）One end for recessed
Bathtub construction（81）, the groove type structure（81）Inside by located at the duct end cap（8）Multiple footpaths that side wall is opened up
To through hole（82）With first hydraulic control mouthful（A）Or second hydraulic control mouthful（B）Connection.
9. a kind of damping buffering valve according to any one of claim 1 to 8, it is characterised in that the valve body（1）For rectangular
Body structure.
10. a kind of damping buffering valve according to any one of claim 1 to 8, it is characterised in that the elastomer（7）For
Spring.
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| CN201710294246.8A CN106870499B (en) | 2017-04-28 | 2017-04-28 | A kind of damping buffering valve |
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| CN201710294246.8A CN106870499B (en) | 2017-04-28 | 2017-04-28 | A kind of damping buffering valve |
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| CN106870499A true CN106870499A (en) | 2017-06-20 |
| CN106870499B CN106870499B (en) | 2018-12-21 |
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| CN201710294246.8A Expired - Fee Related CN106870499B (en) | 2017-04-28 | 2017-04-28 | A kind of damping buffering valve |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109268332A (en) * | 2018-11-15 | 2019-01-25 | 广西柳工机械股份有限公司 | High-low pressure unloading valve and loader hydraulic system |
| CN109611401A (en) * | 2018-12-24 | 2019-04-12 | 宁波斯达弗液压传动有限公司 | A kind of overload oil compensating valve |
| CN112901581A (en) * | 2021-01-15 | 2021-06-04 | 宁波宇洲液压设备有限公司 | Buffer device and sequence valve |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109268332A (en) * | 2018-11-15 | 2019-01-25 | 广西柳工机械股份有限公司 | High-low pressure unloading valve and loader hydraulic system |
| CN109611401A (en) * | 2018-12-24 | 2019-04-12 | 宁波斯达弗液压传动有限公司 | A kind of overload oil compensating valve |
| CN109611401B (en) * | 2018-12-24 | 2024-02-13 | 宁波斯达弗液压传动有限公司 | Overload oil supplementing valve |
| CN112901581A (en) * | 2021-01-15 | 2021-06-04 | 宁波宇洲液压设备有限公司 | Buffer device and sequence valve |
| CN112901581B (en) * | 2021-01-15 | 2023-07-04 | 宁波宇洲液压设备有限公司 | Buffer device and sequence valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106870499B (en) | 2018-12-21 |
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