CN108180177A - It is a kind of for the hydraulic valve of differential circuit and hydraulic differential circuit - Google Patents
It is a kind of for the hydraulic valve of differential circuit and hydraulic differential circuit Download PDFInfo
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- CN108180177A CN108180177A CN201711429543.5A CN201711429543A CN108180177A CN 108180177 A CN108180177 A CN 108180177A CN 201711429543 A CN201711429543 A CN 201711429543A CN 108180177 A CN108180177 A CN 108180177A
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- Prior art keywords
- valve
- hydraulic
- pilot
- guide
- swivel nut
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Classifications
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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
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
- F15B11/024—Systems essentially incorporating special features for controlling the speed or actuating force of an output member by means of differential connection of the servomotor lines, e.g. regenerative circuits
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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
- F15B13/0401—Valve members; Fluid interconnections therefor
- F15B13/0402—Valve members; Fluid interconnections therefor for linearly sliding valves, e.g. spool valves
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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
- F15B13/0401—Valve members; Fluid interconnections therefor
- F15B2013/041—Valve members; Fluid interconnections therefor with two positions
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The present invention proposes a kind of hydraulic valve for differential circuit and hydraulic differential circuit, the hydraulic valve include：Valve body which is provided with hydraulic fluid port A and hydraulic fluid port B；Main valve plug is connected in the valve body, and main valve plug is equipped with the first damp channel；Guide's valve pocket is connected in valve body and is connect with main valve plug by the first elastic component and be formed with control chamber therebetween, and the pilot valve is put on equipped with pilot valve core cavity, through flow hole and the second damp channel connected with control chamber；Pilot valve is movably connected in pilot valve intracavitary, and one end of pilot valve blocks the valve port of guide's valve pocket connected with the second damp channel, and the middle part of pilot valve blocks through flow hole；Swivel nut component is socketed in the outside of guide's valve pocket and is connect with the valve body, which is provided with the swivel nut channel of connection hydraulic fluid port B, and is connect with the other end of pilot valve.The hydraulic valve simplifies differential circuit structure, back pressure when using and provide work into operating mode for reducing controller.
Description
Technical field
The present invention relates to valve technology fields, and in particular to a kind of for the hydraulic valve of differential circuit and hydraulic differential circuit.
Background technology
Differential hydro cylinder control loop has been widely used for industrial hydraulic, engineering as basic hydraulic control circuit
Machinery field etc..Single-piston-rod hydraulic cylinder Differential Control circuit is substantially that the liquid for discharging hydraulic cylinder rod chamber is back to hydraulic pressure
The rodless cavity of cylinder so as to increase the flow into rodless cavity, accordingly also increases the stretching speed of piston rod, neatly meets big
The job requirement of the small speed of thrust and the big speed of low thrust.It is divided into F.F. and work into two kinds of operating modes, F.F. in differential circuit control
Hydraulic cylinder rod chamber is connected with rodless cavity by the hydraulic valve in differential circuit during operating mode, to increase the movement of hydraulic cylinder speed
Degree；Work is into operating mode, then needing rodless cavity and rod chamber disconnection, to increase the power output of hydraulic cylinder.As notification number is
The patent of invention of CN104675807B, entitled " differential hydraulic control system and method and crane ", it discloses a kind of differences
Hydrodynamic pressure control system and method, wherein system include：First reversal valve, the second reversal valve, check valve, limiter of moment and control
Device processed, the first reversal valve is arranged on the oil circuit that the rodless cavity of differential hydro cylinder and oil sources connect, and connects fuel tank；Second commutation
Valve is respectively communicated with the rodless cavity and rod chamber of the first reversal valve, differential hydro cylinder；Check valve is arranged on the second reversal valve and fuel tank
On the oil circuit of connection；Limiter of moment is connect with controller, and the practical lift heavy amount detected is transferred to controller；Controller with
The control terminal connection of second reversal valve, control the second reversal valve commutation, to realize differential hydro cylinder differential state and non-differential shape
The switching of state.Although the invention can realize hydraulic cylinder F.F. and work into the conversion of operating mode, its is complex, comprising
More valve members and detection of electrons and control element, application cost are higher.
Invention content
For some or all of of the above-mentioned technical problem in the presence of the prior art, the present invention proposes one kind and is used for
The hydraulic valve of differential circuit, the hydraulic valve can simplify differential circuit structure, reduce when using and provide work into operating mode of controller
Automatic switchover.
In order to realize more than goal of the invention, on the one hand, the present invention propose it is a kind of have following structure for differential time
The hydraulic valve on road, including：A kind of hydraulic valve for differential circuit, including：
Valve body which is provided with hydraulic fluid port A and hydraulic fluid port B；
Main valve plug is connected in the valve body and blocks hydraulic fluid port B, and the main valve plug is equipped with the first damp channel；
Guide's valve pocket, is connected in valve body, is connect with the main valve plug by the first elastic component and shape therebetween
Into there is a control chamber, and the pilot valve put on it is logical equipped with pilot valve core cavity, through flow hole and the second damping for being connected with control chamber
Road；
Pilot valve is movably connected in pilot valve intracavitary, and one end of pilot valve blocks and the second damp channel
The valve port of guide's valve pocket of connection, the middle part of pilot valve block through flow hole；
Swivel nut component is socketed in the outside of guide's valve pocket and is connect with the valve body, which is provided with connection hydraulic fluid port B
Swivel nut channel, and connect with the other end of pilot valve.
In one embodiment, the swivel nut component includes swivel nut and pilot pressure regulating mechanism, the swivel nut socket
It is fixedly connected in the outside of guide's valve pocket and with the valve body, the pilot pressure regulating mechanism is connect simultaneously with the swivel nut
It acts on the other end of the pilot valve.
In one embodiment, the pilot pressure regulating mechanism includes the second elastic component, adjusting screw, locking screw
Mother, the adjusting screw are inserted into the described one end of swivel nut far from main valve plug through helicitic texture, and the locking nut is socketed in described
Adjusting screw is outer and is connected on the outer surface of the swivel nut.
In one embodiment, it is equipped with spring base between one end of second elastic component and adjusting screw, described the
Gasket is equipped between the other end of two elastic components and the pilot valve, the gasket is connected to the shoulder of the pilot valve
On.
In one embodiment, when the pressure of hydraulic fluid port A is more than the set pressure of pilot pressure regulating mechanism, fluid warp
The pilot valve of the open-top valve port for being pressed in guide's valve pocket of first damp channel, control chamber, the second damp channel, through flow hole to be exposed
Afterwards hydraulic fluid port B is flowed to from through flow hole through swivel nut channel.
In one embodiment, the swivel nut channel includes being located at the first circulation of pilot valve set upper side peripheral shoulder
Slot, the second circulation groove being located between swivel nut and pilot valve peripheral surface and the third circulation groove for being located at swivel nut lower end inside,
The through flow hole, the first circulation groove, the second circulation groove and third circulation groove are sequentially communicated.
In one embodiment, the pilot valve includes the big end being slidably matched with pilot valve core cavity and diameter is far small
In the small end of the diameter of pilot valve core cavity, the small end is equipped with the end of bullet header structure, and the end is connected to the elder generation
On the valve port of guide valve bushing.
In one embodiment, guide's valve pocket shape big, small in ends for middle part, the upper shoulder of guide's valve pocket support
The swivel nut of swivel nut component is connect, there are space between the upper end of guide's valve pocket and swivel nut, the valve is socketed in the middle part of guide's valve pocket
The upper surface of body, the lower end of guide's valve pocket are connect with the valve seal, and the end face of guide's valve pocket lower end is equipped with protrusion, the
The second damping hole in two damp channels is located on the protrusion.
In one embodiment, the outside of the main valve plug is equipped with the sealing element being connect with the valve body, the main valve
The lower end of core is equipped with convex jointing part, and the convex jointing part is equipped with the first damping hole of cross connection, and the upper end of the main valve plug is equipped with
The groove of the first elastic component is accommodated, first damp channel includes accommodating groove, the communication groove and first of the first elastic component
The first damping hole that first hole of damping hole is connected with cross.
Compared with prior art, it is the advantages of hydraulic valve for differential circuit of the invention：
In the present invention, when the pressure of hydraulic fluid port A reaches the Opening pressure that swivel nut component is acted in pilot valve, fluid
Through the first damp channel, the open-top pilot valve of the second damp channel, hydraulic fluid port B is flowed to, and then in pressure difference through recirculation hole, swivel nut channel
Effect is lower to open main valve plug, forced area after poppet port is opened in pilot valve by poppet port before smaller face
Product becomes the larger area of pilot valve big end, after can realizing that pilot valve is opened at elevated pressures in this way, and only needs
Smaller pressure is kept it turned on.The structure can simplify differential circuit structure, reduce when using and provide work into operating mode of controller
Automatically switch.
On the other hand, the present invention proposes a kind of differential hydraulic circuit, which includes differential hydro cylinder, changes
To valve, hydraulic control one-way valve, the first check valve, the second check valve and hydraulic valve, first check valve are reversed as elucidated before
It is located on the first passage between connection reversal valve and the rodless cavity of differential hydro cylinder, oil inlet and the hydraulic control list of the first check valve
It is connected to the oil outlet end of valve by the first pipeline, the second check valve forward direction is connected to connection reversal valve and differential hydro cylinder
Rod chamber between second channel on, the oil inlet of the hydraulic control one-way valve is located at having for the second check valve and differential hydro cylinder
Between rod cavity；The oil inlet of the hydraulic valve is connected on the first pipeline, the oil outlet connection reversal valve oil return of the hydraulic valve
Case.
Compared with prior art, it is the advantages of differential hydraulic circuit of the invention：
The differential hydraulic circuit of the present invention is using the above-mentioned hydraulic valve for differential circuit, when the rodless cavity of differential hydro cylinder
During oil inlet, piston rod stretches out, and the pressure of rodless cavity opens hydraulic control one-way valve, and the fluid of rod chamber is through hydraulic control one-way valve, the first list
Rodless cavity is returned to valve, realizes differential connection.During F.F. operating mode, which is constantly in closed state, realizes piston rod
It is quick mobile.When differential hydro cylinder moves to certain position, and load rises, the pressure of noninductive chamber and rod chamber rises to simultaneously
P1 opens the hydraulic valve for differential circuit, and the pressure of hydraulic cylinder rod chamber drops to P2, and the fluid of rod chamber is through hydraulic control list
To valve, this be used for the hydraulic valve of differential circuit and reversal valve oil return box, differential hydro cylinder enters work into operating mode.Without automatically controlled
Switching of the F.F. operating mode of differential circuit with work into operating mode can be realized automatically.
Description of the drawings
The preferred embodiment of the present invention is described in detail below in conjunction with attached drawing, in figure：
Fig. 1 is the structure diagram of the one of which embodiment of the hydraulic valve for differential circuit of the present invention；
Fig. 2 is the schematic diagram for the hydraulic circuit for including the hydraulic valve of the present invention.
In attached drawing, identical component uses identical reference numeral.Attached drawing is not drawn according to practical ratio.
Specific embodiment
In order to which technical scheme of the present invention and advantage is more clearly understood, below in conjunction with attached drawing to the exemplary of the present invention
Embodiment is described in more detail.Obviously, described embodiment be only the present invention part of the embodiment rather than
The exhaustion of all embodiments.And in the absence of conflict, the feature in the embodiment and embodiment in the present invention can be mutual
It is combined.
The embodiment of the present invention proposes a kind of hydraulic valve for differential circuit, is illustrated below.
Fig. 1 shows a kind of one of which embodiment of hydraulic valve 17 for differential circuit of the present invention.In the implementation
In example, of the invention mainly includes for the hydraulic valve 17 of differential circuit：Valve body 1, main valve plug 2, guide's valve pocket 4, pilot valve 5
With swivel nut component.Wherein, valve body is equipped with hydraulic fluid port A and hydraulic fluid port B.Main valve plug is located in valve body 1 and blocks hydraulic fluid port B, on main valve plug
Equipped with the first damp channel, main valve core outer surface is equipped with the seal groove of installation sealing element.Guide's valve pocket 4 is connect with valve body 1, guide
The lower end of valve pocket 4 is connect by the first elastic component 3 with the upper end of main valve plug 2 and is formed with control chamber 102 therebetween.Separately
Outside, guide's valve pocket 4 is equipped with pilot valve core cavity 404, through flow hole 402 and the second damp channel connected with control chamber 102
401.Pilot valve 5 is movably connected in pilot valve core cavity 404.One end of pilot valve 5 blocks and is connected with the second damp channel
Guide's valve pocket 4 valve port, the middle part of pilot valve 5 blocks through flow hole 402.Swivel nut component is socketed in the outside of pilot valve set 4
And it is fixedly connected with valve body 1.Guide's valve pocket 4 is equipped with the swivel nut channel of connection hydraulic fluid port B and connect control with one end of pilot valve 5
The Opening pressure of pilot valve 5 processed.
In one embodiment, as shown in Figure 1, valve pocket component mainly includes swivel nut 6 and pilot pressure regulating mechanism.Swivel nut
6 are socketed in the outside of guide's valve pocket 4 and are fixedly connected with valve body 1 by helicitic texture.Pilot pressure regulating mechanism connects with swivel nut 6
Connect and act on the upper end of pilot valve 5.It is understood that it is used to adjust the side of the Opening pressure of pilot valve 5 in practice
There are many kinds of formulas, and mechanical adjusting structure used herein is one of which embodiment.
In a preferred embodiment, pilot pressure regulating mechanism mainly includes the second elastic component 8,11 and of adjusting screw
Locking nut 10.Wherein, adjusting screw 11 is inserted into the one end (being upper end in Fig. 1) of swivel nut 6 far from main valve plug 2 through helicitic texture.
Locking nut 10 is socketed in adjusting screw 11 and is connected on the upper end outer surface of swivel nut 6 in a manner that screw thread is tightened.This
The setting of kind structure so that can be achieved with the adjusting to 5 Opening pressure of pilot valve by adjusting screw 11 and locking nut 10.
In the case where 5 Opening pressure of pilot valve is set, can only the Opening pressure of hydraulic fluid port A reach setting value with regard to the hydraulic valve can be opened
17。
In one embodiment, spring base 9 is equipped between the upper end of the second elastic component 8 and adjusting screw 11.Second elasticity
Gasket 7 is equipped between the lower end of part 11 and pilot valve 5.In practical application, the upper end of pilot valve 5 is equipped with shoulder structure, pad
After piece 7 is socketed in pilot valve 5 from the top down, it is connected on the shoulder of pilot valve 5 under the action of the second elastic component 11.
In one embodiment, when the pressure of hydraulic fluid port A is more than the set pressure of pilot pressure regulating mechanism (or for guide
The Opening pressure of spool 5) when, fluid is through the first damp channel, control chamber 102, the second damp channel is open-top is pressed in guide's valve pocket 4
Valve port on pilot valve 5, pilot valve 5 be moved upwards up to expose through flow hole 402 after, fluid is from through flow hole 402 through swivel nut
Channel flows to hydraulic fluid port B.
In one embodiment, swivel nut channel mainly includes being located at the first circulation groove of pilot valve set upper side peripheral shoulder
403rd, the second circulation groove for being located between 5 peripheral surface of swivel nut 6 and pilot valve and be located at 4 lower end inside of swivel nut and valve body 1 it
Between third circulation groove 101.Herein, through flow hole 402, the first circulation groove 403, the second circulation groove and third circulation groove 101 be successively
Connection.
In one embodiment, pilot valve 5 mainly includes the big end being slidably matched with pilot valve core cavity 404 and diameter is remote
Less than the small end of the diameter of pilot valve core cavity 404.The end of bullet header structure is additionally provided on small end, end is connected to guide's valve pocket
On 4 valve port, Fig. 1 is specifically referred to.
In one embodiment, it is mainly middle part shape big, small in ends that guide's valve pocket 4 is whole.Guide's valve pocket 4 is appeared on the stage
Shoulder abuts the swivel nut 6 of swivel nut component, and there are space or gaps between the upper end of guide's valve pocket 4 and swivel nut 6.Guide's valve pocket 4
Middle part is socketed in the upper surface of valve body 1, and the mid diameter of guide's valve pocket 4 is equal with the outer diameter of 1 corresponding part of valve body.Pilot valve
The lower end of set 4 is inserted into being tightly connected in valve body 1 and with valve body 1 by sealing element.It is set on the end face of the lower end of guide's valve pocket 4
There is a protrusion, the second damping hole 401 in the second damp channel is located on protrusion.
In one embodiment, the outside of main valve plug 2 is equipped with multiple sealing elements being connect with valve body 1, which ensures
Connection between main valve plug 2 and valve body 1 is without oil liquid leakage.The lower end of main valve plug 2 is equipped with convex jointing part, which is equipped with cross
First damping hole 201 of type connection.The upper end of main valve plug 2 is equipped with the groove for accommodating the first elastic component 3.First damping therein is logical
Road mainly includes accommodating the groove of the first elastic component 3, communication groove is connected with the first hole of the first damping hole 201 and cross the
One damping hole 201 this three parts.
In an embodiment of the present invention, the diameter of the first damping hole 201 and the second damping hole 401 is equal or differs very little.
Pass through the setting of the first damping hole 201 and the second damping hole 401, it is ensured that needed into differential hydro cylinder under operating mode 12 in work
Back pressure increases the power output of differential hydro cylinder 12.
In one embodiment, as shown in Figure 1, the operation principle of the hydraulic valve 17 of the present invention is as follows：
Pilot valve 5 is acted on valve port, and through flow hole 42 is separated and has certain covering by 5 top convex shoulder of pilot valve
Amount.The diameter of valve port is less than the diameter of the small end of pilot valve 5, and the diameter of the small end of pilot valve 5 is much smaller than pilot valve again
The diameter of chamber 404.When hydraulic fluid port A pressure reach the second elastic component 8 setting pressure when (namely differential hydro cylinder 12 reach work into
During operating mode), the hydraulic oil of hydraulic fluid port A enters control chamber 102 by the first damping hole 21, is applied to using the second damping hole 401
In pilot valve 5 (circular area of the active area for valve port diameter at this time), the pressure that the second elastic component 8 is overcome to set up will be first
5 open-top disengaging valve port of guide valve core.After pilot valve 5 is opened, fluid is applied directly to the diametral plane of pilot valve 5 by valve port
In product (the namely lower end convex shoulder diameter of pilot valve 5), continue upwards to push up pilot valve 5, until opening through flow hole 402.
In this way, fluid, through through flow hole 402, through-flow slot 403, flow-conveying groove 101 flows to hydraulic fluid port B, and the upper and lower cavity of main valve plug 2 generates pressure difference, main
Spool 2 is opened, and fluid flows into hydraulic fluid port B by hydraulic fluid port A.
Pressure when if pilot valve 5 is just opened is P1, the pressure that keeps it turned below is P2, since pilot valve 5 is convex
The diameter of shoulder is more than the diameter of valve port, and P1 is much larger than P2.In this way when reaching work into position, the rod chamber pressure of differential hydro cylinder 12
After power opened pilot valve 5 before this, then drop to P2 at once, so as to ensure the power output of differential hydro cylinder 12.
Include as shown in Figure 2 the differential hydraulic circuit of the hydraulic valve 17 for differential circuit of the present invention it is a kind of specifically
Embodiment.In this embodiment, the differential hydraulic circuit mainly include differential hydro cylinder 12, reversal valve 16, hydraulic control one-way valve 15,
First check valve 14, the second check valve 13 and hydraulic valve 17 as elucidated before.Wherein, reversal valve 16 is connect with oil sources.It is changing
First passage is formed between the rodless cavity of valve 16 and differential hydro cylinder 12, in having in reversal valve 16 and differential hydro cylinder 12
Second channel is formed between rod cavity.It is formed between the rodless cavity of differential hydro cylinder 12 and the rod chamber of differential hydro cylinder 12
Third channel.First check valve 14 is connected to hydraulic control one-way valve 15 on the third channel.Wherein, the first check valve 14 is fuel-displaced
Mouth connection first passage, the oil inlet of the first check valve 14 pass through the oil outlet that the first pipeline connects hydraulic control one-way valve 15.Second
The positive connection of check valve 13 on a second pass, the oil inlet of hydraulic control one-way valve 15 be located at the second check valve 13 after, with it is differential
On second channel part before the rod chamber of hydraulic cylinder 12, the hydraulic control mouth connection first passage of hydraulic control one-way valve 15.The hydraulic pressure
The oil inlet of valve 17 is connected on the first pipeline, and the oil outlet of hydraulic valve is through 16 oil return box of reversal valve.
In one embodiment, as shown in Fig. 2, the operation principle in the differential hydraulic circuit is：When the nothing of differential hydro cylinder
When rod cavity oil inlet, hydraulic stem stretch out, the pressure of the rodless cavity of differential hydro cylinder 12 opens hydraulic control one-way valve 15, the fluid of rod chamber
Enter rodless cavity by the second check valve 14 by hydraulic control one-way valve 15, realize differential connection.Into F.F. operating mode, the hydraulic valve 17
Closed state is constantly in, at this time the speed of differential hydro cylinder 12.When differential hydro cylinder 12 moves to certain position load
During rising, the pressure of rodless cavity and rod chamber rises to P1 and opens hydraulic valve 17 simultaneously, differential hydraulic after hydraulic valve 17 is opened
The pressure of the rod chamber of cylinder 12 drops to P2, and the fluid of rod chamber is through hydraulic control one-way valve 15, hydraulic valve 17,16 oil return of reversal valve
Case, differential hydro cylinder 12 enter work into operating mode.
Although preferred embodiments of the present invention have been described, but those skilled in the art once know basic creation
Property concept, then additional changes and modifications may be made to these embodiments.Therefore, appended claims are intended to be construed to include excellent
Select embodiment and fall into having altered and/or changing for the scope of the invention, the change made according to an embodiment of the invention and/
Or modification should be covered by the protection scope of the present invention.
Claims (10)
1. a kind of hydraulic valve for differential circuit, which is characterized in that including：
Valve body which is provided with hydraulic fluid port A and hydraulic fluid port B；
Main valve plug is connected in the valve body and blocks hydraulic fluid port B, and the main valve plug is equipped with the first damp channel；
Guide's valve pocket, is connected in valve body, is connect by the first elastic component with the main valve plug and is formed with therebetween
Control chamber, and the pilot valve is put on equipped with pilot valve core cavity, through flow hole and the second damp channel connected with control chamber；
Pilot valve is movably connected in pilot valve intracavitary, and one end of pilot valve blocks and connected with the second damp channel
Guide's valve pocket valve port, the middle part of pilot valve blocks through flow hole；
Swivel nut component is socketed in the outside of guide's valve pocket and is connect with the valve body, which is provided with the spiral shell of connection hydraulic fluid port B
Channel is covered, and is connect with the other end of pilot valve.
2. hydraulic valve according to claim 1, which is characterized in that the swivel nut component includes swivel nut and pilot pressure is adjusted
Mechanism, the swivel nut are socketed in the outside of guide's valve pocket and are fixedly connected with the valve body, and the pilot pressure adjusts machine
Structure connect with the swivel nut and acts on the other end of the pilot valve.
3. hydraulic valve according to claim 2, which is characterized in that the pilot pressure regulating mechanism includes the second elasticity
Part, adjusting screw, locking nut, the adjusting screw is inserted into the described one end of swivel nut far from main valve plug through helicitic texture, described
Locking nut is socketed in outside the adjusting screw and is connected on the outer surface of the swivel nut.
4. hydraulic valve according to claim 3, which is characterized in that between one end of second elastic component and adjusting screw
Equipped with spring base, gasket is equipped between the other end of second elastic component and the pilot valve, the gasket is connected to institute
It states on the shoulder of pilot valve.
5. hydraulic valve according to any one of claim 2 to 4, which is characterized in that when the pressure of hydraulic fluid port A is more than first pilot
During the set pressure of power regulating mechanism, fluid is through the first damp channel, control chamber, the second damp channel is open-top is pressed in guide's valve pocket
Valve port pilot valve, flow to hydraulic fluid port B from through flow hole through swivel nut channel after through flow hole is exposed.
6. hydraulic valve according to any one of claim 1 to 5, which is characterized in that the swivel nut channel includes being located at elder generation
It first circulation groove of pilot valve set upper side peripheral shoulder, the second circulation groove being located between swivel nut and pilot valve peripheral surface and sets
In the third circulation groove of swivel nut lower end inside, the through flow hole, the first circulation groove, the second circulation groove and third circulation groove connect successively
It is logical.
7. hydraulic valve according to any one of claim 1 to 6, which is characterized in that the pilot valve includes and guide
The big end and diameter that spool chamber is slidably matched are much smaller than the small end of the diameter of pilot valve core cavity, and the small end is equipped with sub warhead knot
The end of structure, the end are connected on the valve port of guide's valve pocket.
8. hydraulic valve according to any one of claim 1 to 7, which is characterized in that guide's valve pocket for middle part it is big, two
Small shape is held, the upper shoulder of guide's valve pocket abuts the swivel nut of swivel nut component, and there are skies between the upper end of guide's valve pocket and swivel nut
Between, the upper surface of the valve body is socketed in the middle part of guide's valve pocket, the lower end of guide's valve pocket is connect with the valve seal, guide
The end face of valve pocket lower end is equipped with protrusion, and the second damping hole in the second damp channel is located on the protrusion.
9. hydraulic valve according to any one of claim 1 to 8, which is characterized in that the outside of the main valve plug be equipped with
The sealing element of valve body connection, the lower end of the main valve plug are equipped with convex jointing part, and the convex jointing part is equipped with the of cross connection
One damping hole, the upper end of the main valve plug are equipped with the groove for accommodating the first elastic component, and first damp channel includes accommodating the
The first damping hole that the groove of one elastic component, communication groove are connected with the first hole of the first damping hole and cross.
10. a kind of differential hydraulic circuit, which is characterized in that including differential hydro cylinder, reversal valve, hydraulic control one-way valve, first unidirectionally
Valve, the second check valve and hydraulic valve as claimed in any one of claims 1-9 wherein, the oil inlet of first check valve are reversed
It is located on the first passage between connection reversal valve and the rodless cavity of differential hydro cylinder, oil inlet and the hydraulic control list of the first check valve
It is connected to the oil outlet end of valve by the first pipeline, the second check valve forward direction is connected to connection reversal valve and differential hydro cylinder
Rod chamber between second channel on, the oil inlet of the hydraulic control one-way valve is located at having for the second check valve and differential hydro cylinder
Between rod cavity；The oil inlet of the hydraulic valve is connected on the first pipeline, the oil outlet connection reversal valve oil return of the hydraulic valve
Case.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711429543.5A CN108180177A (en) | 2017-12-26 | 2017-12-26 | It is a kind of for the hydraulic valve of differential circuit and hydraulic differential circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711429543.5A CN108180177A (en) | 2017-12-26 | 2017-12-26 | It is a kind of for the hydraulic valve of differential circuit and hydraulic differential circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108180177A true CN108180177A (en) | 2018-06-19 |
Family
ID=62547595
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711429543.5A Withdrawn CN108180177A (en) | 2017-12-26 | 2017-12-26 | It is a kind of for the hydraulic valve of differential circuit and hydraulic differential circuit |
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| CN (1) | CN108180177A (en) |
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| CN1644933A (en) * | 2005-01-17 | 2005-07-27 | 江苏华宏科技股份有限公司 | Differential speed accelerating circuits |
| CN101253335A (en) * | 2005-08-19 | 2008-08-27 | 布奇尔液压公司 | Circuit for controlling a double-action hydraulic drive cylinder |
| CN101680206A (en) * | 2007-05-11 | 2010-03-24 | 诺德液压股份公司 | Hydraulic load control valve device |
| CN201753790U (en) * | 2010-07-19 | 2011-03-02 | 浙江苏强格液压有限公司 | Safety valve for multi-way valve |
| CN102859204A (en) * | 2010-05-17 | 2013-01-02 | 沃尔沃建造设备有限公司 | Pressure control valve |
| CN103353002A (en) * | 2013-06-28 | 2013-10-16 | 平原机器厂（新乡） | Overflow safety valve of aviation hydraulic system |
| CN203532390U (en) * | 2013-10-31 | 2014-04-09 | 长沙中联消防机械有限公司 | Hydraulic cylinder quick motion loop and engineering machine |
| CN105065359A (en) * | 2015-08-13 | 2015-11-18 | 山东常林机械集团股份有限公司 | Safety oil supplementing valve for multi-path valve |
| US20160053906A1 (en) * | 2014-08-25 | 2016-02-25 | Industrias Marrucci Ltda | Remotely-Actuated Dual-Pressure Relief Valve |
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| US4456170A (en) * | 1981-07-14 | 1984-06-26 | Robert Bosch Gmbh | Control valve |
| CN2694014Y (en) * | 2003-12-25 | 2005-04-20 | 上海亿力电器有限公司 | Closing gun stopping machine type relief valve decompressing by gap used in high pressure washer pump |
| CN1644933A (en) * | 2005-01-17 | 2005-07-27 | 江苏华宏科技股份有限公司 | Differential speed accelerating circuits |
| CN101253335A (en) * | 2005-08-19 | 2008-08-27 | 布奇尔液压公司 | Circuit for controlling a double-action hydraulic drive cylinder |
| CN101680206A (en) * | 2007-05-11 | 2010-03-24 | 诺德液压股份公司 | Hydraulic load control valve device |
| CN102859204A (en) * | 2010-05-17 | 2013-01-02 | 沃尔沃建造设备有限公司 | Pressure control valve |
| CN201753790U (en) * | 2010-07-19 | 2011-03-02 | 浙江苏强格液压有限公司 | Safety valve for multi-way valve |
| CN103353002A (en) * | 2013-06-28 | 2013-10-16 | 平原机器厂（新乡） | Overflow safety valve of aviation hydraulic system |
| CN203532390U (en) * | 2013-10-31 | 2014-04-09 | 长沙中联消防机械有限公司 | Hydraulic cylinder quick motion loop and engineering machine |
| US20160053906A1 (en) * | 2014-08-25 | 2016-02-25 | Industrias Marrucci Ltda | Remotely-Actuated Dual-Pressure Relief Valve |
| CN105065359A (en) * | 2015-08-13 | 2015-11-18 | 山东常林机械集团股份有限公司 | Safety oil supplementing valve for multi-path valve |
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Application publication date: 20180619 |