CN107725523A - Load sensing multi-way valve and there is its engineering machinery - Google Patents
Load sensing multi-way valve and there is its engineering machinery Download PDFInfo
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- CN107725523A CN107725523A CN201711121123.0A CN201711121123A CN107725523A CN 107725523 A CN107725523 A CN 107725523A CN 201711121123 A CN201711121123 A CN 201711121123A CN 107725523 A CN107725523 A CN 107725523A
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- load sensing
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- 239000012530 fluid Substances 0.000 claims abstract description 56
- 239000002828 fuel tank Substances 0.000 claims abstract description 19
- 239000003921 oil Substances 0.000 claims description 138
- 238000009434 installation Methods 0.000 claims description 30
- 239000010720 hydraulic oil Substances 0.000 claims description 19
- 239000000446 fuel Substances 0.000 claims description 3
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- 238000005265 energy consumption Methods 0.000 abstract description 11
- 238000013016 damping Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 230000033001 locomotion Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000006641 stabilisation Effects 0.000 description 3
- 238000011105 stabilization Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
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
- 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
-
- 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
- F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
-
- 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
- F15B13/0416—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor with means or adapted for load sensing
- F15B13/0417—Load sensing elements; Internal fluid connections therefor; Anti-saturation or pressure-compensation valves
-
- 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
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
- F16K11/06—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements
- F16K11/065—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members
- F16K11/07—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members with cylindrical slides
- F16K11/0716—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members with cylindrical slides with fluid passages through the valve member
-
- 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
- F15B2013/0412—Valve members; Fluid interconnections therefor with three positions
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The present invention provides a kind of load sensing multi-way valve and has its engineering machinery, and load sensing multi-way valve includes：Fuel tank；Valve body, defines the chamber connected with fuel tank in valve body, and valve body is communicated with the oil inlet of chamber, feedback hydraulic fluid port, oil return opening and actuator port, and feedback hydraulic fluid port, oil return opening and actuator port are respectively two and are symmetrically arranged at the both sides of oil inlet；Main valve plug, main valve plug are movably located in chamber to switch different hydraulic fluid ports；Pump signal feedback device, pump signal feedback device is with chamber with the oil pressure information in feedback chamber；Recuperation valve, oil mass of the oil pressure information control that recuperation valve is connected to be fed back according to pump signal feedback device with chamber and pump signal feedback device into chamber.Load sensing multi-way valve according to embodiments of the present invention, valve body use symmetrical expression distributed architecture, cause that the volume of valve is smaller in the case where ensureing flow condition, and crushing is lower, saves energy consumption, is quick on the draw, and versatility is high, and the valve arrangement is simple, easily realizes.
Description
Technical field
The present invention relates to hydraulic machinery technical field, more particularly to a kind of load sensing multi-way valve and there is its engineering machine
Tool.
Background technology
At present, it is more extensively using hydraulic transmission technology, hydraulic pressure in the weight equipments such as various engineering machinery, walking machine
Road valve group, especially load sensing multi-way valve are widely used in various weight equipments, versatile, it can with control cylinder,
The speed of service of the various executing agencies such as motor and direction, and possess good be precisely controlled and fine motion characteristic, load-sensitive
Banked direction control valves disclosure satisfy that the energy-conservation of hydraulic system, operates the precisely characteristic such as stable, more executing agency's composite move substantially, but with
The raising to hydraulic control system requirement, accuracy, saving energy consumption and knot of the existing load sensing multi-way valve in Mechanical course
Deficiency is still had in terms of structure reasonability, crushing is big, and versatility is not high, and turning into needs to solve the problems, such as.
The purpose of this patent is in view of the deficienciess of the prior art, and to provide a kind of more excellent load of performance quick
Feel banked direction control valves, valve design is symmetric distributed structure, can make full use of axial dimension, is ensureing the premise of enough flows
Under, the volume of valve is smaller, and crushing is lower, and has numerous expansion modules, facilitates the selection and application of client, has very strong lead to
The property used.
The content of the invention
In view of this, the present invention provides a kind of load sensing multi-way valve.
The present invention also provides a kind of engineering machinery with above-mentioned load sensing multi-way valve.
In order to solve the above technical problems, the present invention uses following technical scheme：
The load sensing multi-way valve of embodiment according to a first aspect of the present invention, including：Fuel tank；Valve body, the valve body is interior to be limited
Surely there is the chamber connected with the fuel tank, the valve body is communicated with the oil inlet of the chamber, feedback hydraulic fluid port, oil return opening and work
Make hydraulic fluid port, feedback hydraulic fluid port, the oil return opening and the actuator port are respectively two and are symmetrically arranged at the oil inlet
Both sides；Main valve plug, the main valve plug are movably located in the chamber to switch different hydraulic fluid ports；Pump signal feedback device, institute
Pump signal feedback device is stated with the chamber to feed back the oil pressure information in the chamber；Recuperation valve, the recuperation valve with
The oil pressure information that the chamber is connected with the pump signal feedback device to be fed back according to the pump signal feedback device control into
Enter the oil mass of the chamber.
Further, the chamber is described to feed back hydraulic fluid port, the oil return opening and the work along the axially extending of the valve body
The groove for being respectively formed as being located on the internal face of the chamber as hydraulic fluid port.
Further, the oil inlet is located at the middle part of the valve body, feedback hydraulic fluid port, the oil return opening and the work
Make the both sides that axial direction of the hydraulic fluid port along the chamber is symmetrically arranged at the oil inlet successively from outside to inside.
Further, the fuel tank is connected with two feedback hydraulic fluid ports respectively by the first oil circuit and the second oil circuit, institute
The 3rd oil circuit that first oil circuit and second oil circuit are communicated between the first oil circuit and second oil circuit is stated, it is described
Load sensing multi-way valve also includes：Feedback signal shuttle valve, the feedback signal shuttle valve be located on the 3rd oil circuit and with it is described
The fuel injection pressure signal control that pump signal feedback device is connected to be fed back according to the pump signal feedback device with the recuperation valve enters
The oil pressure of difference feedback hydraulic fluid port.
Further, installation cavity is provided with the valve body, the feedback signal shuttle valve and the recuperation valve are separately mounted to
In the installation cavity.
Further, the installation cavity is formed as column, and the feedback signal shuttle valve and the recuperation valve are coaxially located at institute
State in installation cavity.
Further, the installation cavity be arranged in parallel with the chamber.
Further, the recuperation valve includes：Compensating spool, the compensating spool are located in the installation cavity, the peace
The internal face behaveing affectedly is provided with spring cavity groove, fuel-displaced groove and hydraulic oil groove along its axially spaced distribution, the spring
Chamber groove is connected with the feedback hydraulic fluid port, and the fuel-displaced groove is connected with the oil inlet, the hydraulic oil groove respectively；Compensation
Spring, the counterbalance spring are located in the installation cavity and between the feedback signal shuttle valve and the compensating spool, institute
The feedback signal shuttle valve and the compensating spool are only supported in the both ends for stating counterbalance spring respectively.
Further, the load sensing multi-way valve also includes：
First overflow valve and the second overflow valve, first overflow valve and second overflow valve are respectively provided at described first
On oil circuit and second oil circuit.
The engineering machinery of embodiment includes the load sensing multi-way valve according to above-described embodiment according to a second aspect of the present invention.
The above-mentioned technical proposal of the present invention has the beneficial effect that：
Load sensing multi-way valve according to embodiments of the present invention, by being rationally designed to it, valve body is distributed using symmetrical expression
Structure, make it that the volume of valve is smaller in the case where ensureing flow condition, crushing is lower, energy consumption is saved, by setting feedback signal shuttle valve
The compensation effect of valve group is improved with recuperation valve, ensures the stability of valve body flow, high sensitivity, reaction is fast, and the valve has numerous
Expansion module, it is easy to select and applies, there is very strong versatility, and the valve arrangement is simple, it is easy to accomplish.
Brief description of the drawings
Fig. 1 is the system control schematic diagram of the load sensing multi-way valve of the embodiment of the present invention；
Fig. 2 is the sectional view of the load sensing multi-way valve of the embodiment of the present invention；
Fig. 3 is structural representation of the main valve plug of the load sensing multi-way valve of the embodiment of the present invention in middle position；
Fig. 4 is structural representation of the main valve plug of the load sensing multi-way valve of the embodiment of the present invention at left side；
Fig. 5 is structural representation of the main valve plug of the load sensing multi-way valve of the embodiment of the present invention at right side.
Reference：
Load sensing multi-way valve 100；
Fuel tank 10；First oil circuit 11；Second oil circuit 12；3rd oil circuit 13；
Valve body 20；Chamber 21；Oil inlet 22；Feed back hydraulic fluid port 23；
Oil return opening 24；Actuator port 25；Installation cavity 26；
Main valve plug 30；Main oil gallery 31；Damping hole 32；Oil leak hole 33；Pressure port 34；
Pump signal feedback device 40；
Recuperation valve 50；Compensating spool 51；Counterbalance spring 52；
Spring cavity groove 53；Fuel-displaced groove 54；Hydraulic oil groove 55；
Feedback signal shuttle valve 60；
First overflow valve 70；Second overflow valve 71；
Variable pump 80；Oil cylinder 81；Balanced valve 82；Port overflow valve 83.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
Accompanying drawing, the technical scheme of the embodiment of the present invention is clearly and completely described.Obviously, described embodiment is this hair
Bright part of the embodiment, rather than whole embodiments.Based on described embodiments of the invention, ordinary skill
The every other embodiment that personnel are obtained, belongs to the scope of protection of the invention.
Load sensing multi-way valve 100 according to embodiments of the present invention is specifically described with reference to accompanying drawing first below.
As shown in Figures 1 to 5, load sensing multi-way valve 100 according to embodiments of the present invention include fuel tank 10, valve body 20,
Main valve plug 30, pump signal feedback device 40 and recuperation valve 50.
Specifically, the chamber 21 connected with fuel tank 10 is defined in valve body 20, valve body 20 is communicated with entering for chamber 21
Hydraulic fluid port 22, feedback hydraulic fluid port 23, oil return opening 24 and actuator port 25, feedback hydraulic fluid port 23, oil return opening 24 and actuator port 25 are respectively
Two and the both sides of oil inlet 22 are symmetrically arranged at, main valve plug 30 is movably located in chamber 21 to switch different hydraulic fluid ports, pump letter
Number feedback device 40 connects with chamber 21 to be fed back with the oil pressure information in feedback chamber 21, recuperation valve 50 with chamber 21 and pump signal
Oil mass of the oil pressure information control that device 40 is connected to be fed back according to pump signal feedback device 40 into chamber 21.
That is, load sensing multi-way valve 100 is mainly by fuel tank 10, valve body 20, main valve plug 30, pump signal feedback device
40 and recuperation valve 50 form.Wherein, the chamber 21 connected with fuel tank 10, fuel tank 10 and chamber 21 can be defined in valve body 20
Can be by oil communication, the hydraulic oil in chamber 21 can be flowed into fuel tank 10 by oil circuit, and chamber 21 can be along valve body
20 it is axially extending, can be respectively equipped with valve body 20 connecting chamber 21 oil inlet 22, feedback hydraulic fluid port 23, the and of oil return opening 24
Actuator port 25, feedback hydraulic fluid port 23, oil return opening 24 and actuator port 25 can be respectively two, and be symmetrically distributed in oil inlet 22
Both sides, symmetric distributed structure can make full use of axial dimension, on the premise of enough flows are ensured so that valve body 20
Volume is smaller, reduce crushing, save energy consumption, and cause banked direction control valves there is numerous expansion modules, be easy to when in use selection and
Using there is very strong versatility, increase application.
Main valve plug 30 is movably installed in chamber 21 and can switch different hydraulic fluid ports by mobile main valve plug 30, from
And make it that chamber 21 cuts off or connected with oil circuit, the chamber 21 and main valve plug 30 on valve body 20 should match, can be according to hydraulic pressure
The size of oil stream amount and the difference of Median Function, different main valve plugs 30 is selected, to meet hydraulic fluid flow rate and Median Function
Needs, main valve plug 30 can control its movement by modes such as machinery, guide's hydraulic oil, the liquid of the opening of main valve plug 30 output
Force feed flow can respectively install back-moving spring, main valve with direct proportion in the displacement of main valve plug 30 at the both ends of main valve plug 30
Core 30 reset force can promote when returning middle position as caused by back-moving spring, save power consumption.
Pump signal feedback device 40 can be connected with chamber 21 with the oil pressure information in feedback chamber 21, and recuperation valve 50 can be with
Linked together respectively with chamber 21 and pump signal feedback device 40, the oil pressure that can be fed back according to pump signal feedback device 40 is believed
Breath control can adjust the oil mass into chamber 21, variable pump 80 can be distinguished into the oil mass of chamber 21 by variable pump 80
Linked together with pump signal feedback device 40 and recuperation valve 50, pump signal feedback device 40 can make the liquid of the pumping hole of variable pump 80
Pressure pressure, which is consistently higher than, loads certain pressure value, and recuperation valve 50 can make the pressure difference approximation before and after main valve plug 30 constant, chamber
Oil pressure information in room 21 can feed back to variable pump 80 by pump signal feedback device 40, and variable pump 80 can be believed according to oil pressure
The hydraulic-oil quantity that breath regulation is entered in chamber 21 by recuperation valve 50, so as to ensure the stabilization of hydraulic-oil quantity in chamber 21,
So that load can adjust the oil mass in chamber 21 in time when changing so that banked direction control valves is flexibly stablized when in use.
Thus, load sensing multi-way valve 100 according to embodiments of the present invention, by being rationally designed to it, valve body 20 uses
Symmetrical expression distributed architecture, make it that the volume of valve body 20 is smaller in the case where ensureing flow condition, crushing is lower, reduces energy consumption, improves valve
The compensation effect of group, ensure the stability of hydraulic fluid flow rate in valve body 20, load banked direction control valves high sensitivity when changing, instead
Should be fast, and the banked direction control valves has numerous expansion modules, is easy to select and applies, and has very strong versatility, it is simple in construction, it is easy to
Realize.
According to one embodiment of present invention, chamber 21 can extend along the axial direction of valve body 20, chamber 21 and main valve
Core 30 matches, preferably to coordinate so that the hydraulic oil in chamber 21 can successfully flow out, or enable hydraulic oil
Chamber 21 is successfully flowed into, it is more so as to ensure to adjust the hydraulic fluid flow rate in chamber 21 in time and stably according to load
The flexible stabilization of road valve, saves energy consumption, and feedback hydraulic fluid port 23, oil return opening 24 and actuator port 25 can be respectively formed as being located at chamber
Groove on 21 internal face, groove can be that specific size can be according to reality along the annular of the circumferentially extending of chamber 21
Need reasonable selection.
In some embodiments of the invention, oil inlet 22 can be located at the middle part of valve body 20, feedback hydraulic fluid port 23, oil return opening
24 and actuator port 25 can be symmetrically arranged at the both sides of oil inlet 22 successively from outside to inside along the axial direction of chamber 21, be easy to banked direction control valves
The arrangement of middle oil circuit, makes full use of axial dimension, on the premise of enough flows are ensured so that the volume of valve body 20 is smaller, drop
Low pressure loss, energy consumption is saved, and cause banked direction control valves that there is numerous expansion modules, be easy to select and apply, increase versatility.
In other embodiments of the present invention, fuel tank 10 can be by the first oil circuit 11 and the second oil circuit 12 respectively with entering
Two of the both sides of hydraulic fluid port 22 feedback hydraulic fluid ports 23 connect, and the hydraulic oil in chamber 21 can flow out from feedback hydraulic fluid port 23, and pass through the
One oil circuit 11 and the second oil circuit 12 flow into fuel tank 10, and the first oil circuit can be communicated between the first oil circuit 11 and the second oil circuit 12
11 and second oil circuit 12 the 3rd oil circuit 13.Load sensing multi-way valve 100 can also include feedback signal shuttle valve 60, feedback signal
Shuttle valve 60 can be located on the 3rd oil circuit 13, feedback signal shuttle valve 60 can respectively with pump signal feedback device 40 and recuperation valve 50
Link together, the oil pressure information in chamber 21 can be fed back to feedback signal shuttle valve 60 respectively by two feedback hydraulic fluid ports 23.
Feedback signal shuttle valve 60 can select the higher feedback hydraulic fluid port 23 of oil pressure and by the high oil pressure information of this oil port
Feed back to pump signal feedback device 40 and recuperation valve 50 respectively, the oil pressure information can in such chamber 21 passes through feedback signal
Shuttle valve 60 feeds back to pump signal feedback device 40 and recuperation valve 50, and pump signal feedback device 40 can give high oil pressure feedback of the information
Variable pump 80, variable pump 80 can adjust the oil mass entered by recuperation valve 50 in chamber 21, realize and feed back dress according to pump signal
The fuel injection pressure signal control for putting 40 feedbacks enters the oil pressure of different feedback hydraulic fluid ports.Can be more delicately by feedback signal shuttle valve 60
Oil pressure in feedback chamber 21, so as to the hydraulic fluid flow rate that regulation enters in chamber 21 in time, ensure the stability of banked direction control valves, save
About energy consumption.
In one particular embodiment of the present invention, installation cavity 26, the He of feedback signal shuttle valve 60 can be provided with valve body 20
Recuperation valve 50 can be separately mounted in installation cavity 26, and installation cavity 26 should match with feedback signal shuttle valve 60 and recuperation valve 50,
Installation cavity 26 can be located at the bottom of chamber 21, be easy to arrangement and the installation of banked direction control valves oil circuit.
In other specific embodiments of the present invention, installation cavity 26 can be formed as column, the He of feedback signal shuttle valve 60
Recuperation valve 50 can be coaxially located in installation cavity 26, and feedback signal shuttle valve 60 can be located at the left side of recuperation valve 50, feedback signal
Shuttle valve 60 can quickly obtain the oil pressure information in chamber 21 in time and timely and effectively feed back to recuperation valve 50 and pump signal
Feedback device 40, so as to the flow of hydraulic oil in adjusting in time into chamber 21.
In another embodiment of the present invention, installation cavity 26 can be arranged in parallel with chamber 21, and installation cavity 26 can edge
The axially extending of valve body 20 so that the structure arrangement of banked direction control valves is more reasonable, reduces volume.
According to some embodiments of the present invention, recuperation valve 50 may comprise compensating for valve element 51 and counterbalance spring 52, recuperation valve
Core 51 can be located in installation cavity 26, spring cavity groove 53, the fuel-displaced groove 54 that the internal face of installation cavity 26 can be respectively equipped with
With hydraulic oil groove 55, spring cavity groove 53, fuel-displaced groove 54 and hydraulic oil groove 55 can be respectively along the axial directions of installation cavity 26
It is spaced apart distribution, spacing distance reasonable selection successively from left to right, spring cavity groove 53 can be connected to one with feedback hydraulic fluid port 23
Rise, fuel-displaced groove 54 can link together with oil inlet 22, hydraulic oil groove 55 respectively；Counterbalance spring 52 can be located at installation
In chamber 26 and between feedback signal shuttle valve 60 and compensating spool 51, it that is to say and installed successively from left to right in installation cavity 26
There are feedback signal shuttle valve 60, counterbalance spring 52 and compensating spool 51, the right side of compensating spool 51 can be provided with screw plug, compensate bullet
The both ends of spring 52 only can support feedback signal shuttle valve 60 and compensating spool 51 respectively.
In middle position, symmetrical oil return opening 24 can be connected main valve plug 30 with feedback hydraulic fluid port 23 respectively in valve body 20,
When main valve plug 30 is acted on by pilot force, when being moved to side, the actuator port 25 of side connects with oil inlet 22, this work
Hydraulic fluid port 25 is also connected by main valve plug 30 with the feedback hydraulic fluid port 23 of homonymy, and now, the pressure oil of actuator port 25 passes through homonymy
Hydraulic fluid port 23 is fed back, pressure signal is fed back to and the coaxial mounted feedback signal shuttle valve 60 of compensating spool 51, feedback signal shuttle valve
60 feed back to spring cavity groove 53 again, and the actuator port 25 of opposite side connects with oil return opening 24, makes the oil return of executing agency quick
Flow back in fuel tank 10.
When hydraulic oil groove 55 has pressure oil, main valve plug 30 is in middle position, the compression compensation spring 52 of compensating spool 51, now
Compensating spool 51, can be between the hydraulic fluid port of cutoff high oil groove 55 and the fuel-displaced groove 54 of compensating spool 51 close to the leftmost side
Connection, leakage and the energy consumption of pressure oil can be reduced, play the effect of energy-conservation.
When main valve plug 30 moves, hydraulic oil can flow out from actuator port 25, and now compensating spool 51 can be according to bullet
The load pressure of spring chamber groove 53, rests on pressure balanced position, and compensating spool 51 can consume unnecessary pressure and energy
Amount.
Actuator port 25 can link together with oil cylinder 81 respectively, and in the motion process of oil cylinder 81, load pressure has prominent
During increasing, feedback signal shuttle valve 60 can select high oil pressure information and be fed back to spring cavity groove 53, now, compensating spool 51
The pressure signal that feedback signal shuttle valve 60 feeds back to spring cavity groove 53 can be received close to the side of spring cavity groove 53, will
Compensating spool 51 shifts the rightmost side onto so that compensating spool 51 forms non-return valve function, the hydraulic fluid port and benefit of cutoff high oil groove 55
Repay the connection between the fuel-displaced groove 54 of valve element 51 so that the pump side pressure oil of variable pump 80 keeps stable, for variable pump 80
And hydraulic system plays certain protective effect.
In some embodiments of the invention, main valve plug 30 can be housed in valve body 20, can be set respectively on main valve plug 30
There are two 33, two pressure ports 34 of oil leak hole of damping hole 32, two of main oil gallery 31, two, main oil gallery 31, damping hole 32, draining
Hole 33 and pressure port 34 can respectively symmetrically be distributed in the both sides at the middle part of valve body 20.
As shown in figure 3, when main valve plug 30 is in middle position, the fluid of left side feedback hydraulic fluid port 23 can pass through the damping hole in left side
32, then the oil leak hole 33 by left side, at the oil return opening 24 of pressure oil drain charge to left side；The fluid of the feedback hydraulic fluid port 23 on right side
Can be by the damping hole 32 on right side, then the oil leak hole 33 by right side, at the oil return opening 24 of pressure oil drain charge to right side.
It is low pressure oil back chamber at the actuator port 25 in left side as shown in figure 4, when main valve plug 30 is moved to left side, can be with
Linked together by main valve plug 30 and left side oil return opening 24；It is high pressure oil suction chamber at the actuator port 25 on right side, can passes through
Main valve plug 30 links together with oil inlet 22, and the load pressure signal of right side actuator port 25 can pass through the pressure port on right side
34th, main oil gallery 31 and damping hole 32 enter feedback signal shuttle valve 60, then enter back into spring cavity groove 53, now, compensating spool
51 can rest on pressure balanced position according to the load pressure of spring cavity groove 53, and it is unnecessary that compensating spool 51 can consume
Pressure and energy.
As shown in figure 5, when main valve plug 30 is moved to right side, operation principle is identical when being moved to left side with main valve plug 30,
It can be linked together by main valve plug 30 and right side oil return opening 24；It is low pressure oil suction chamber at the actuator port 25 on right side, left side
Actuator port 25 at be high pressure oil back chamber, can be linked together by main valve plug 30 and oil inlet 22, left side actuator port
25 load pressure signal can enter feedback signal shuttle valve 60 by the pressure port 34, main oil gallery 31 and damping hole 32 in left side,
Then spring cavity groove 53 is entered back into, now, compensating spool 51 can rest on pressure according to the load pressure of spring cavity groove 53
The position of dynamic balance, compensating spool 51 can consume unnecessary pressure and energy.
According to some embodiments of the present invention, load sensing multi-way valve 100 can also include the first overflow valve 70 and second
Overflow valve 71, the first overflow valve 70 and the second overflow valve 71 can be respectively provided on the first oil circuit 11 and the second oil circuit 12, and first
The overflow valve 71 of overflow valve 70 and second can be respectively provided on valve body 20, and the first overflow valve 70 and the second overflow valve 71 can be distinguished
For screw plug, hydraulic oil can be flowed into fuel tank 10 by the first overflow valve 70 and the second overflow valve 71 respectively in chamber 21.
In some embodiments of the invention, load sensing multi-way valve 100 can also include balanced valve 82, and balanced valve 82 can
, can be with the relative equilibrium of the pressure at both sides of adjustment valve 82 to be connected to the one of oil cylinder 81 between hydraulic fluid port and actuator port 25.
In other embodiments of the present invention, load sensing multi-way valve 100 can also include port overflow valve 83, port
Overflow valve 83 may be mounted at the inside of valve body 20, and port overflow valve 83 is replaced by plug, and port overflow valve 83 can divide
Another hydraulic fluid port, balanced valve 82, the actuator port 25 on right side and the oil return opening 24 on right side not with oil cylinder 81 link together.
Load sensing multi-way valve 100 according to embodiments of the present invention, by being rationally designed to it, valve body 20 uses symmetrical expression
Distributed architecture, make it that the volume of banked direction control valves is smaller in the case where ensureing flow condition, crushing is lower, reduces energy consumption, is fed back by setting
Signal shuttle valve 60 and recuperation valve 50 improve the compensation effect of valve group, ensure the stabilization of hydraulic fluid flow rate in the chamber 21 of valve body 20
Property, when hydraulic pressure changes in chamber 21 banked direction control valves is quick on the draw in time, the banked direction control valves has numerous expansion modules, just
In selection and application, there is very strong versatility, and the banked direction control valves is simple in construction, it is easy to accomplish.
Engineering machinery according to embodiments of the present invention includes the load sensing multi-way valve 100 according to above-described embodiment, due to
Load sensing multi-way valve 100 according to the above embodiment of the present invention has above-mentioned technique effect, therefore, according to embodiments of the present invention
Engineering machinery also there is corresponding technique effect, i.e., in the case where ensureing flow condition cause banked direction control valves volume it is smaller, crushing is more
It is low, energy consumption is reduced, banked direction control valves is quick on the draw in time, and the banked direction control valves has numerous expansion modules, is easy to select and applies, and has very
Strong versatility.
The other structures of engineering machinery according to embodiments of the present invention and operation are all to those skilled in the art
It is appreciated that and easily realize, therefore be not described in detail.
Described above is the preferred embodiment of the present invention, it is noted that for those skilled in the art
For, on the premise of principle of the present invention is not departed from, some improvements and modifications can also be made, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (10)
- A kind of 1. load sensing multi-way valve, it is characterised in that including：Fuel tank；Valve body, the chamber connected with the fuel tank is defined in the valve body, the valve body is communicated with the oil-feed of the chamber Mouth, feedback hydraulic fluid port, oil return opening and actuator port, feedback hydraulic fluid port, the oil return opening and the actuator port are respectively two And it is symmetrically arranged at the both sides of the oil inlet；Main valve plug, the main valve plug are movably located in the chamber to switch different hydraulic fluid ports；Pump signal feedback device, the pump signal feedback device are believed with the chamber with feeding back the oil pressure in the chamber Breath；Recuperation valve, the recuperation valve is connected with the chamber and the pump signal feedback device to be filled with being fed back according to the pump signal The oil pressure information control for putting feedback enters the oil mass of the chamber.
- 2. load sensing multi-way valve according to claim 1, it is characterised in that prolong axial direction of the chamber along the valve body Stretch, the feedback hydraulic fluid port, the oil return opening and the actuator port are respectively formed as being located at recessed on the internal face of the chamber Groove.
- 3. load sensing multi-way valve according to claim 2, it is characterised in that the oil inlet is located in the valve body Portion, feedback hydraulic fluid port, the oil return opening and the actuator port are symmetrically arranged at successively from outside to inside along the axial direction of the chamber The both sides of the oil inlet.
- 4. load sensing multi-way valve according to claim 1, it is characterised in that the fuel tank passes through the first oil circuit and second Oil circuit is connected with two feedback hydraulic fluid ports respectively, and described first is communicated between first oil circuit and second oil circuit 3rd oil circuit of oil circuit and second oil circuit, the load sensing multi-way valve also include：Feedback signal shuttle valve, the feedback signal shuttle valve be located on the 3rd oil circuit and with the pump signal feedback device and institute State the oil pressure that the fuel injection pressure signal control that recuperation valve is connected to feed back according to the pump signal feedback device enters different feedback hydraulic fluid ports.
- 5. load sensing multi-way valve according to claim 4, it is characterised in that installation cavity is provided with the valve body, it is described Feedback signal shuttle valve and the recuperation valve are separately mounted in the installation cavity.
- 6. load sensing multi-way valve according to claim 5, it is characterised in that the installation cavity is formed as column, described Feedback signal shuttle valve and the recuperation valve are coaxially located in the installation cavity.
- 7. load sensing multi-way valve according to claim 6, it is characterised in that the installation cavity is parallel with the chamber to be set Put.
- 8. load sensing multi-way valve according to claim 5, it is characterised in that the recuperation valve includes：Compensating spool, the compensating spool are located in the installation cavity, and the internal face of the installation cavity is provided with along its axially spaced-apart The spring cavity groove, fuel-displaced groove and hydraulic oil groove of distribution are opened, the spring cavity groove is connected with the feedback hydraulic fluid port, described Fuel-displaced groove is connected with the oil inlet, the hydraulic oil groove respectively；Counterbalance spring, the counterbalance spring are located in the installation cavity and are located at the feedback signal shuttle valve and the compensating spool Between, the feedback signal shuttle valve and the compensating spool are only supported in the both ends of the counterbalance spring respectively.
- 9. load sensing multi-way valve according to claim 4, it is characterised in that also include：First overflow valve and the second overflow valve, first overflow valve and second overflow valve are respectively provided at first oil circuit On second oil circuit.
- 10. a kind of engineering machinery, it is characterised in that including the load sensing multi-way valve any one of claim 1-9.
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| CN201711121123.0A CN107725523B (en) | 2017-11-14 | 2017-11-14 | Load-sensitive multiway valve and engineering machinery with same |
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| CN201711121123.0A CN107725523B (en) | 2017-11-14 | 2017-11-14 | Load-sensitive multiway valve and engineering machinery with same |
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| CN110307204A (en) * | 2018-03-27 | 2019-10-08 | 罗伯特·博世有限公司 | The valve member group prevented in spool control valve with load |
| CN110848190A (en) * | 2019-09-25 | 2020-02-28 | 张家口凯航液压科技有限公司 | Integrated load sensitive flow divider valve |
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| CN107725523B (en) | 2023-12-15 |
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