CN207437487U - Load sensing multi-way valve and with its engineering machinery - Google Patents
Load sensing multi-way valve and with its engineering machinery Download PDFInfo
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- CN207437487U CN207437487U CN201721512540.3U CN201721512540U CN207437487U CN 207437487 U CN207437487 U CN 207437487U CN 201721512540 U CN201721512540 U CN 201721512540U CN 207437487 U CN207437487 U CN 207437487U
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Abstract
The utility model 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 equipped with the oil inlet of connecting 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 indoor oil pressure information of feedback cavity；Recuperation valve, recuperation valve are connected the oil pressure information fed back according to pump signal feedback device control with chamber and pump signal feedback device into the oil mass of chamber.According to the load sensing multi-way valve of the utility model embodiment, valve body in the case where ensureing flow condition so that the volume smaller of valve, crushing is lower, saves energy consumption, is quick on the draw, versatility is high, and the valve arrangement is simple, easily realizes using symmetrical distributed architecture.
Description
Technical field
The utility model is related to hydraulic machinery technical field, more particularly to a kind of load sensing multi-way valve and with its work
Journey machinery.
Background technology
At present, in the weight equipments such as various engineering machinery, walking machine, extensively using hydraulic transmission technology, hydraulic pressure is more
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
Multi-way valve disclosure satisfy that substantially energy saving, the operation of hydraulic system precisely stablize, the characteristics such as more executing agency's composite moves, but with
The raising to hydraulic control system requirement, existing load sensing multi-way valve is in the accuracy, saving energy consumption and knot of Mechanical course
Deficiency is still had in terms of structure reasonability, crushing is big, and versatility is not high, becomes problem to be solved.
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 multi-way valve, valve design is symmetric distributed structure, can make full use of axial dimension, is ensureing the premise of enough flows
Under, the volume smaller of valve, crushing is lower, and has numerous expansion modules, facilitates the selection and application of client, has very strong lead to
The property used.
Utility model content
In view of this, the utility model provides a kind of load sensing multi-way valve.
The utility model also provides a kind of engineering machinery with above-mentioned load sensing multi-way valve.
In order to solve the above technical problems, the utility model uses following technical scheme：
According to the load sensing multi-way valve of the utility model first aspect embodiment, including：Fuel tank；Valve body, the valve body
The chamber connected with the fuel tank is inside defined, the valve body is equipped with the oil inlet for connecting the chamber, feedback hydraulic fluid port, oil return opening
And actuator port, the feedback hydraulic fluid port, the oil return opening and the actuator port are respectively two and are symmetrically arranged at the oil inlet
The both sides of mouth；Main valve plug, the main valve plug are movably located in the chamber to switch different hydraulic fluid ports；Pump signal feedback dress
It puts, the pump signal feedback device and the chamber are to feed back the indoor oil pressure information of the chamber；Recuperation valve, the compensation
Valve is connected with the chamber and the pump signal feedback device with the oil pressure information control fed back according to the pump signal feedback device
System enters 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, the feedback hydraulic fluid port, the oil return opening and the work
The axial direction for making hydraulic fluid port along the chamber is symmetrically arranged at the both sides of the oil inlet successively from outside to inside.
Further, the fuel tank is connected by the first oil circuit and the second oil circuit with two feedback hydraulic fluid ports respectively, institute
The 3rd oil circuit for being equipped between the first oil circuit and second oil circuit and connecting first oil circuit and second oil circuit is stated, it is described
Load sensing multi-way valve further includes：Feedback signal shuttle valve, the feedback signal shuttle valve be located on the 3rd oil circuit and with it is described
Pump signal feedback device is connected the fuel injection pressure signal fed back according to the pump signal feedback device control with the recuperation valve and enters
The oil pressure of difference feedback hydraulic fluid port.
Further, installation cavity is equipped in 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
It states in installation cavity.
Further, the installation cavity is 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 equipped with spring cavity groove, fuel-displaced groove and high pressure 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 respectively with the oil inlet, the high pressure oil groove；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 further 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.
It is more including the load-sensitive according to above-described embodiment according to the engineering machinery of the utility model second aspect embodiment
Road valve.
The above-mentioned technical proposal of the utility model has the beneficial effect that：
According to the load sensing multi-way valve of the utility model embodiment, by being rationally designed to it, valve body is using symmetrical
Distributed architecture in the case where ensureing flow condition so that the volume smaller of valve, crushing is lower, saves energy consumption, by setting feedback signal
Shuttle valve and recuperation valve improve the compensation effect of valve group, ensure the stability of valve body flow, high sensitivity, reaction is fast, which has crowd
More expansion modules convenient for selecting and applying, has very strong versatility, and the valve arrangement is simple, it is easy to accomplish.
Description of the drawings
Fig. 1 is the system control schematic diagram of the load sensing multi-way valve of the utility model embodiment；
Fig. 2 is the sectional view of the load sensing multi-way valve of the utility model embodiment；
Fig. 3 is structure diagram of the main valve plug of the load sensing multi-way valve of the utility model embodiment in middle position；
Fig. 4 is structure diagram of the main valve plug of the load sensing multi-way valve of the utility model embodiment at left side；
Fig. 5 is structure diagram of the main valve plug of the load sensing multi-way valve of the utility model embodiment at right side.
Reference numeral：
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；High pressure 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.
Specific embodiment
It is new below in conjunction with this practicality to make the purpose, technical scheme and advantage of the utility model embodiment clearer
The technical solution of the utility model embodiment is clearly and completely described in the attached drawing of type embodiment.Obviously, it is described
Embodiment is the part of the embodiment of the utility model, instead of all the embodiments.Based on described the utility model
Embodiment, those of ordinary skill in the art's all other embodiments obtained, shall fall within the protection scope of the present invention.
The load sensing multi-way valve 100 according to the utility model embodiment is specifically described with reference to attached drawing first below.
As shown in Figures 1 to 5, fuel tank 10, valve body are included according to the load sensing multi-way valve 100 of the utility model embodiment
20th, main valve plug 30, pump signal feedback device 40 and recuperation valve 50.
Specifically, define the chamber 21 connected with fuel tank 10 in valve body 20, valve body 20 be equipped with connecting chamber 21 into
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 is connected with chamber 21 with the oil pressure information in feedback chamber 21, and recuperation valve 50 is fed back with chamber 21 and pump signal
Device 40 is connected the oil pressure information fed back according to pump signal feedback device 40 control into the oil mass of 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 by oil circuit in fuel tank 10, and chamber 21 can be along valve body
20 it is axially extending, can be respectively equipped on valve body 20 connecting chamber 21 oil inlet 22, feedback hydraulic fluid port 23,24 and of oil return opening
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 smaller, reduce crushing, save energy consumption, and cause multi-way valve have numerous expansion modules, when in use convenient for selection and
Using with very strong versatility, increase application range.
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 so that chamber 21 cuts off or connects 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 select different main valve plugs 30, 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 30 opening of main valve plug output
Pressure oil flow can respectively install resetting spring, main valve with direct proportion in the displacement of main valve plug 30 at the both ends of main valve plug 30
The reset force that core 30 can be generated when returning middle position by resetting spring promotes, and saves power energy 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
It links 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
It links together with pump signal feedback device 40 and recuperation valve 50, pump signal feedback device 40 can make the liquid of 80 pumping hole of variable pump
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
Breath adjusts the hydraulic-oil quantity entered by recuperation valve 50 in chamber 21, 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 multi-way valve is flexibly stablized when in use.
As a result, according to the load sensing multi-way valve 100 of the utility model embodiment, by being rationally designed to it, valve body 20
Using symmetrical distributed architecture, in the case where ensureing flow condition so that the volume smaller of valve body 20, crushing is lower, energy consumption is reduced, is carried
The compensation effect of high valve group ensures the stability of hydraulic fluid flow rate in valve body 20, multichannel threshold sensitivity when load changes
Height, reaction is fast, and the multi-way valve has numerous expansion modules, convenient for selecting and applying, has very strong versatility, structure letter
It is single, it is easy to accomplish.
One embodiment according to the present utility model, chamber 21 can extend along the axial direction of valve body 20, chamber 21 with
Main valve plug 30 matches, preferably to coordinate so that the hydraulic oil in chamber 21 can successfully flow out or cause hydraulic oil
Chamber 21 can be successfully flowed into, to adjust the hydraulic fluid flow rate in chamber 21 in time and steadily according to load, so as to protect
The flexible stabilization of multi-way valve is demonstrate,proved, saves energy consumption, feedback hydraulic fluid port 23, oil return opening 24 and actuator port 25 can be respectively formed as being located at
Groove on the internal face of chamber 21, groove can be along the annular of the circumferentially extending of chamber 21, and specific size can basis
Actual needs reasonably selects.
In some embodiments of the utility model, oil inlet 22 can be located at the middle part of valve body 20, and feedback hydraulic fluid port 23 returns
Hydraulic fluid port 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, convenient for more
The arrangement of oil circuit, makes full use of axial dimension in the valve of road, on the premise of enough flows are ensured so that the volume of valve body 20 is more
It is small, crushing is reduced, saves energy consumption, and cause multi-way valve that there is numerous expansion modules, convenient for selecting and applying, increase is general
Property.
In other embodiments of the utility model, fuel tank 10 can be distinguished by the first oil circuit 11 and the second oil circuit 12
It is connected with two feedback hydraulic fluid ports 23 of 22 both sides of oil inlet, the hydraulic oil in chamber 21 can be flowed out from feedback hydraulic fluid port 23, and be led to
It crosses the first oil circuit 11 and the second oil circuit 12 flows into fuel tank 10, connection first can be equipped between the first oil circuit 11 and the second oil circuit 12
3rd oil circuit 13 of 11 and second oil circuit 12 of oil circuit.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 compensation
Valve 50 links together, and the oil pressure information in chamber 21 can be fed back to feedback signal shuttle valve respectively by two feedback hydraulic fluid ports 23
60。
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 in such chamber 21 can pass 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 feed back to high oil pressure information
Variable pump 80, variable pump 80 can adjust through recuperation valve 50 into the oil mass in chamber 21, realize and feed back dress according to pump signal
The fuel injection pressure signal control of 40 feedbacks is put into the oil pressure of different feedback hydraulic fluid ports.It can be more delicately by feedback signal shuttle valve 60
Oil pressure in feedback chamber 21 so as to adjust the hydraulic fluid flow rate into chamber 21 in time, ensures the stability of multi-way valve, section
About energy consumption.
In a specific embodiment of the utility model, installation cavity 26, feedback signal shuttle valve can be equipped in valve body 20
60 and recuperation valve 50 can be separately mounted in installation cavity 26, installation cavity 26 should be with 50 phase of feedback signal shuttle valve 60 and recuperation valve
Match somebody with somebody, installation cavity 26 can be located at the lower part of chamber 21, arrangement and installation convenient for multi-way valve oil circuit.
In other specific embodiments of the utility model, installation cavity 26 can be formed as column, feedback signal shuttle valve
60 and recuperation valve 50 can coaxially be located in installation cavity 26, feedback signal shuttle valve 60 can be located at recuperation valve 50 left side, feedback
Signal shuttle valve 60 can quickly obtain the oil pressure information in chamber 21 and timely and effectively feed back to recuperation valve 50 and pump in time
Signal feedback device 40, so as to the flow of hydraulic oil in being adjusted in time into chamber 21.
In another embodiment of the utility model, installation cavity 26 can be arranged in parallel with chamber 21, and installation cavity 26 can
With along the axially extending of valve body 20 so that the structure arrangement of multi-way valve is more reasonable, reduces volume.
Some embodiments according to the present utility model, recuperation valve 50 may comprise compensating for spool 51 and counterbalance spring 52, mend
Repaying spool 51 can be located in installation cavity 26, spring cavity groove 53 that the internal face of installation cavity 26 can be respectively equipped with, fuel-displaced recessed
Slot 54 and high pressure oil groove 55, spring cavity groove 53, fuel-displaced groove 54 and high pressure oil groove 55 can be respectively along installation cavitys 26
Axial to be spaced apart distribution successively from left to right, spacing distance reasonably selects, and spring cavity groove 53 can be connected with feedback hydraulic fluid port 23
Together, fuel-displaced groove 54 can link together with oil inlet 22, high pressure oil groove 55 respectively；Counterbalance spring 52 can be located at
In installation cavity 26 and between feedback signal shuttle valve 60 and compensating spool 51, it that is to say in installation cavity 26 from left to right successively
Feedback signal shuttle valve 60, counterbalance spring 52 and compensating spool 51 are installed, the right side of compensating spool 51 can be equipped with screw plug, mend
Feedback signal shuttle valve 60 and compensating spool 51 can only be supported respectively by repaying the both ends of spring 52.
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 be subject to pilot force, when being moved to one side, the actuator port 25 of one side is connected 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, at this point, the pressure oil of actuator port 25 passes through homonymy
Hydraulic fluid port 23 is fed back, pressure signal is fed back to and 51 coaxial mounted feedback signal shuttle valve 60 of compensating spool, feedback signal shuttle valve
60 feed back to spring cavity groove 53 again, and the actuator port 25 of opposite side is connected with oil return opening 24, and the oil return for making executing agency is quick
It flows back in fuel tank 10.
When high pressure oil groove 55 has pressure oil, main valve plug 30 is in middle position, 51 compression compensation spring 52 of compensating spool, at this time
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 energy saving effect.
When main valve plug 30 moves, hydraulic oil can be flowed out from actuator port 25, and compensating spool 51 can be according to bullet at this time
The load pressure of spring chamber groove 53, rests on pressure balanced position, and compensating spool 51 can consume extra pressure and energy
Amount.
Actuator port 25 can link together with oil cylinder 81 respectively, and in 81 motion process of oil cylinder, 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, at this point, 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 one side of spring cavity groove 53, it 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 spool 51 so that the pump side pressure oil of variable pump 80 keeps stablizing, for variable pump 80
And hydraulic system plays certain protective effect.
In some embodiments of the utility model, main valve plug 30 in valve body 20 can be housed, can be divided on main valve plug 30
Do not set 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,
Oil leak hole 33 and pressure port 34 can respectively symmetrically be distributed in the both sides at 20 middle part of valve body.
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, it can be with
It is 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, then main oil gallery 31 and damping hole 32 enter back into spring cavity groove 53, at this point, compensating spool into feedback signal shuttle valve 60
51 can rest on pressure balanced position according to the load pressure of spring cavity groove 53, and it is extra 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 for 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, at this point, 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 extra pressure and energy.
Some embodiments according to the present utility model, load sensing multi-way valve 100 can also include 70 He of the first overflow valve
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,
First overflow valve 70 and the second overflow valve 71 can be respectively provided on valve body 20, and the first overflow valve 70 and the second overflow valve 71 can be with
Respectively screw plug, hydraulic oil can be flowed by the first overflow valve 70 and the second overflow valve 71 in fuel tank 10 respectively in chamber 21.
In some embodiments of the utility model, load sensing multi-way valve 100 can also include balanced valve 82, balanced valve
82 can be connected between a hydraulic fluid port of oil cylinder 81 and actuator port 25, can be with the relatively flat of 82 pressure at both sides of adjustment valve
Weighing apparatus.
In other embodiments of the utility model, 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
To be connected to one with another hydraulic fluid port of oil cylinder 81, balanced valve 82, the actuator port 25 on right side and the oil return opening 24 on right side respectively
It rises.
According to the load sensing multi-way valve 100 of the utility model embodiment, by being rationally designed to it, the use pair of valve body 20
Title formula distributed architecture in the case where ensureing flow condition so that the volume smaller of multi-way valve, crushing is lower, reduces energy consumption, passes through setting
Feedback signal shuttle valve 60 and recuperation valve 50 improve the compensation effect of valve group, ensure the steady of hydraulic fluid flow rate in the chamber 21 of valve body 20
It is qualitative, when hydraulic pressure changes in chamber 21 multi-way valve is quick on the draw in time, which has numerous expansion modules,
Convenient for selecting and applying, there is very strong versatility, and the multi-way valve has the advantages of simple structure and easy realization.
Load sensing multi-way valve 100 according to above-described embodiment is included according to the engineering machinery of the utility model embodiment,
Since there is above-mentioned technique effect according to the load sensing multi-way valve 100 of the utility model above-described embodiment, according to this reality
Also there is corresponding technique effect with the engineering machinery of new embodiment, i.e., so that the volume of multi-way valve in the case where ensureing flow condition
Smaller, crushing is lower, reduces energy consumption, and multi-way valve is quick on the draw in time, which has numerous expansion modules, convenient for selection with
Using with very strong versatility.
According to the other structures of the engineering machinery of the utility model embodiment and operation to those skilled in the art
All it is to be appreciated that and easy to implement, therefore is not described in detail.
The above is the preferred embodiment of the utility model, it is noted that for the ordinary skill of the art
For personnel, on the premise of principle described in the utility model is not departed from, several improvements and modifications can also be made, these improvement
The scope of protection of the utility model is also should be regarded as with retouching.
Claims (10)
1. a kind of load sensing multi-way valve, which is characterized in that including：
Fuel tank；
Valve body, the chamber connected with the fuel tank is defined in the valve body, and the valve body is equipped with the oil inlet for connecting the chamber
Mouth, feedback hydraulic fluid port, oil return opening and actuator port, the 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 indoor oil pressure of 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 of feedback is put into the oil mass of the chamber.
2. load sensing multi-way valve according to claim 1, which is characterized in that the chamber prolongs along the axial direction of the valve body
It stretches, 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
Slot.
3. load sensing multi-way valve according to claim 2, which is characterized in that the oil inlet is located in the valve body
Portion, the 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, which is characterized in that the fuel tank passes through the first oil circuit and second
Oil circuit connects respectively with two feedback hydraulic fluid ports, and connection described first is equipped between first oil circuit and second oil circuit
3rd oil circuit of oil circuit and second oil circuit, the load sensing multi-way valve further 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
It states recuperation valve and is connected the fuel injection pressure signal fed back according to the pump signal feedback device control into the oil pressure of different feedback hydraulic fluid ports.
5. load sensing multi-way valve according to claim 4, which is characterized in that installation cavity is equipped in 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, which is characterized 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, which is characterized in that the installation cavity is parallel with the chamber to be set
It puts.
8. load sensing multi-way valve according to claim 5, which is characterized 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 equipped with along its axially spaced-apart
The spring cavity groove, fuel-displaced groove and high pressure oil groove of distribution are opened, the spring cavity groove is connected with the feedback hydraulic fluid port, described
Fuel-displaced groove is connected respectively with the oil inlet, the high pressure oil groove；
Counterbalance spring, the counterbalance spring are located in the installation cavity and positioned 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, which is characterized in that further 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, which is characterized in that including the load sensing multi-way valve any one of claim 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721512540.3U CN207437487U (en) | 2017-11-14 | 2017-11-14 | Load sensing multi-way valve and with its engineering machinery |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721512540.3U CN207437487U (en) | 2017-11-14 | 2017-11-14 | Load sensing multi-way valve and with its engineering machinery |
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| Publication Number | Publication Date |
|---|---|
| CN207437487U true CN207437487U (en) | 2018-06-01 |
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| CN201721512540.3U Active CN207437487U (en) | 2017-11-14 | 2017-11-14 | Load sensing multi-way valve and with its engineering machinery |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107725523A (en) * | 2017-11-14 | 2018-02-23 | 江苏恒立液压科技有限公司 | Load sensing multi-way valve and there is its engineering machinery |
-
2017
- 2017-11-14 CN CN201721512540.3U patent/CN207437487U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107725523A (en) * | 2017-11-14 | 2018-02-23 | 江苏恒立液压科技有限公司 | Load sensing multi-way valve and there is its engineering machinery |
| CN107725523B (en) * | 2017-11-14 | 2023-12-15 | 江苏恒立液压科技有限公司 | Load-sensitive multiway valve and engineering machinery with same |
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