CN105840571A - Valve body of load-sensitive multi-way valve reversing link and load-sensitive multi-way valve reversing link - Google Patents
Valve body of load-sensitive multi-way valve reversing link and load-sensitive multi-way valve reversing link Download PDFInfo
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- CN105840571A CN105840571A CN201510023298.2A CN201510023298A CN105840571A CN 105840571 A CN105840571 A CN 105840571A CN 201510023298 A CN201510023298 A CN 201510023298A CN 105840571 A CN105840571 A CN 105840571A
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Abstract
The invention relates to a valve body of a load-sensitive multi-way valve reversing link and the load-sensitive multi-way valve reversing link. The valve body of the load-sensitive multi-way valve reversing link comprises a valve plate body, in which an oil inlet, a working oil port, an oil return port and a pressure signal port are arranged. A main reversing valve hole, a pressure compensation valve hole and a one-way valve hole are arranged in the valve plate body. A main oil inlet cavity, a working oil cavity, a main oil return cavity and a main feedback oil cavity are at least formed between the main reversing valve hole and a main reversing valve rod arranged in the main reversing valve hole. A compensation valve oil-inlet cavity, a compensation valve oil-outlet cavity, a spring-side control cavity and a non-spring-side control cavity are at least formed between the least formed between the pressure compensation valve hole and a pressure compensation valve rod arranged in the pressure compensation valve hole. A spring-side oil outlet cavity and a non-spring-side oil inlet cavity are at least formed between the one-way valve hole and a one-way valve rod arranged in the one-way valve hole. The valve body of the load-sensitive multi-way valve reversing link and the load-sensitive multi-way valve reversing link have following beneficial effects: differential pressure of an inlet and an outlet of the main reversing valve hole remains constant such that all reversing links can independently work; and system flow is only related to the working stroke of the main reversing valve rod.
Description
Technical field
The present invention relates to engineering machinery field, particularly relate to a kind of load sensing multi-way valve commutation connection valve
Body and load sensing multi-way valve commutation connection.
Background technology
Load sensitive system is that one experiences system pressure-traffic demand, and only provides required stream
Amount and the hydraulic circuit of pressure.Load sensing multi-way valve is the core parts of construction machinery hydraulic system,
Between pump and executive component, when each executive component works, working flow and spool aperture
Relevant, and unrelated with load pressure.Although load sensing multi-way valve valve body profile is simple at present, but
Its internal galleries is designed with different complicated inner cavity and long narrow abnormity hole slot, and casting technique is the most multiple
Miscellaneous and poor universality, therefore, designs rational in infrastructure, compact, and highly versatile, dependable performance is many
Road valve body has the biggest practical value in engineering machinery field.
Current load sensing multi-way valve commutation connection, its valve body includes the cunning controlling each actuator
Valve, shuttle valve, check valve, safety overflow valve and oil duct etc., during commutation connection work, actuator port
Pressure is by the oilhole entering signal oil pocket on corresponding reversal valve valve rod, then draws through shuttle valve, work
Oil pressure i.e. signal oil pressure is delivered to oil-feed connection, then feeds back to load sensitive pump, it is achieved the load of system
Sensitive function.
The shortcoming of above-mentioned existing load sensing multi-way valve is:
1) existing multi-way valve body is in order to realize Ioad-sensing control, and overall structure is relatively big, occupies
More space, structure is the compactest, brings more inconvenience to installing.
2) the highest Ls of load sensing multi-way valve (Load sensing, load-sensitive) pressure is believed at present
Number selection use shuttle valve realize, use shuttle valve select Ls signal maximum pressure, make multichannel valve oil
Road is extremely complex, and is not easy to make integral multitandem valve.
Summary of the invention
The purpose of the present invention is to propose to a kind of load sensing multi-way valve commutation connection valve body and load-sensitive is many
Road valve commutation connection, its internal galleries is simple, rational in infrastructure, compact.
For achieving the above object, the invention provides a kind of load sensing multi-way valve commutation connection valve body,
It includes valve block body, and described valve block body is provided with oil-in, actuator port, oil return opening
With pressure signal mouth, described valve block this most internal be provided with main reversing valve hole, pressure compensation valve opening and
Unidirectional valve opening；
Master at least can be formed between described main reversing valve hole and its internal main reversing valve bar arranged
Oil suction chamber, working oil chamber, main oil back chamber and primary feedback oil pocket；By described main reversing valve bar energy
Enough control described main oil suction chamber, described primary feedback oil pocket, described main oil back chamber and described working oil
Chamber connected relation each other；
At least can shape between described pressure compensation valve opening and its internal pressure compensation valve rod arranged
Recuperation valve oil suction chamber, recuperation valve is become to go out oil pocket, control chamber, spring side and without control chamber, spring side；
By described pressure compensation valve rod, it is possible to regulate described recuperation valve oil suction chamber and go out with described recuperation valve
Flow between oil pocket；
Spring side at least can be formed fuel-displaced between described unidirectional valve opening and its internal unidirectional valve rod
Chamber and without spring side oil suction chamber；
Described oil-in connects with described recuperation valve oil suction chamber, and described recuperation valve goes out oil pocket with described
Main oil suction chamber connects；Described actuator port connects with described working oil chamber and described primary feedback oil pocket,
Described oil return opening connects with described main oil back chamber, and described pressure signal mouth is fuel-displaced with described spring side
Chamber connects, described primary feedback oil pocket and control chamber, described spring side and described side without spring oil suction chamber
Connection.
One preferably or in alternative embodiment, between described actuator port and described primary feedback oil pocket
Connect by being arranged on the oil duct within described main reversing valve bar.
One preferably or in alternative embodiment, described pressure compensation valve rod is provided with described enter
The oil through of hydraulic fluid port connection, described oil through is also with the oil duct within described pressure compensation valve rod even
Logical, the oil duct within described pressure compensation valve rod connects without control chamber, spring side.
One preferably or in alternative embodiment, described primary feedback oil pocket and control chamber, described spring side
Between by being arranged on described valve block intrinsic damping hole link.
Preferably or in alternative embodiment, described valve block body is additionally provided with repairing valve opening one,
Described repairing valve opening is thread cartridge hole, is used for installing Fill valve, overload oil compensating valve or spiral shell in it
Stricture of vagina plug.
One, preferably or in alternative embodiment, described main reversing valve hole is along the axle of described valve block body
To setting, and it is positioned at the middle part of described valve block body.
One, preferably or in alternative embodiment, described pressure compensation valve opening is along described valve block body
Axially arranged, and it is positioned at the side in described main reversing valve hole, described actuator port and described oil return
Mouth is positioned at the opposite side in described main reversing valve hole.
One, preferably or in alternative embodiment, described unidirectional valve opening is along the radial direction of described valve block body
Arrange, and be arranged on the end of described pressure compensation valve opening.
One, preferably or in alternative embodiment, described actuator port and described oil return opening are two,
Two described working oils are formed between described main reversing valve hole and its internal main reversing valve bar arranged
Chamber and two described main oil back chambers, each described actuator port correspondence connects working oil chamber described in,
Main oil back chamber described in each described oil return opening correspondence connection one.
Preferably or in alternative embodiment, described valve block body is provided with two repairing valve openings one.
For achieving the above object, present invention also offers a kind of load sensing multi-way valve commutation connection, its
Commutate including the load sensing multi-way valve in any of the above-described embodiment and join valve body.
One, preferably or in alternative embodiment, the master of described load sensing multi-way valve commutation connection valve body changes
Main reversing valve bar is set in valve opening and forms reversal valve；Described load sensing multi-way valve commutation connection valve body
Pressure compensation valve opening in arrange pressure-compensated valve bar formed pressure-compensated valve；Described load-sensitive
In the unidirectional valve opening of banked direction control valves commutation connection valve body, check valve bar is set and forms check valve.
One, preferably or in alternative embodiment, the commutation of described load sensing multi-way valve joins the repairing of valve body
Fill valve, overload oil compensating valve or screw plug are installed in valve opening.
Based on technique scheme, the present invention at least has the advantages that
The load sensing multi-way valve commutation connection valve body that the present invention provides ensure that main reversing valve hole passes in and out
The pressure reduction of mouth is constant, makes each commutation connection to work independently from each other, the flow of system and main reversing valve
The impulse stroke of bar is relevant, and uses one-way valve structures to replace shuttle valve to select load sensing multi-way valve
The highest Ls pressure signal, simplifies banked direction control valves oil duct, is structurally easier to make integral multi-way
Valve, rational in infrastructure, compact, it is simple to install, convenient maintenance.
Accompanying drawing explanation
Accompanying drawing described herein is used for providing a further understanding of the present invention, constitutes the application's
A part, the schematic description and description of the present invention is used for explaining the present invention, and it is right to be not intended that
The improper restriction of the present invention.In the accompanying drawings:
The cross-sectional schematic of the load sensing multi-way valve commutation connection valve body that Fig. 1 provides for the present invention；
The cross-sectional schematic of the load sensing multi-way valve commutation connection that Fig. 2 provides for the present invention；
The hydraulic principle schematic diagram of the load sensing multi-way valve commutation connection that Fig. 3 provides for the present invention.
Label in accompanying drawing:
1-valve block body；2-oil-in；3-actuator port；4-oil return opening；5-pressure signal mouth；
6-main reversing valve hole；7-pressure compensation valve opening；The unidirectional valve opening of 8-；9-main reversing valve bar；10-master
Oil suction chamber；11-working oil chamber；The main oil back chamber of 12-；13-primary feedback oil pocket；14-recuperation valve oil-feed
Chamber；15-recuperation valve goes out oil pocket；Control chamber, 16-spring side；Oil duct within 17-main reversing valve bar；
Oil duct within 18-pressure compensation valve rod；19-pressure compensation valve rod；20-damps duct；21-
Repairing valve opening；22-reversal valve；23-pressure-compensated valve；24-the first check valve；25-transships repairing
Valve；26-damps.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in embodiment is carried out clearly
Chu, it is fully described by.Obviously, described embodiment is only a part of embodiment of the present invention,
Rather than whole embodiments.Based on embodiments of the invention, those of ordinary skill in the art are not having
Have and make the every other embodiment obtained under creative work premise, broadly fall into present invention protection
Scope.
In describing the invention, it is to be understood that term " " center ", " longitudinally ", " laterally ",
"front", "rear", "left", "right", " vertically ", " level ", " top ", " end ", " interior ", " outward "
It is based on orientation shown in the drawings or position relationship in the orientation indicated or position relationship, merely to
It is easy to describe the present invention and simplification description rather than instruction or the device of hint indication or element is necessary
There is specific orientation, with specific azimuth configuration and operation, therefore it is not intended that to the present invention
The restriction of protection domain.
As it is shown in figure 1, the load sensing multi-way valve commutation for present invention offer joins the schematic of valve body
Embodiment, in this illustrative examples, load sensing multi-way valve commutation connection valve body includes that valve block is originally
Body 1, valve block body 1 is provided with oil-in 2, actuator port 3, oil return opening 4 and pressure letter
Number mouth 5, is provided with main reversing valve hole 6, pressure compensation valve opening 7 and check valve in valve block body 1
Hole 8；Wherein, actuator port 3 is for being connected with actuator.
It is used in main reversing valve hole 6 arranging main reversing valve bar 9 (as shown in Figure 2), main commutation
At least can be formed between valve opening 6 and its internal main reversing valve bar 9 arranged main oil suction chamber 10,
Working oil chamber 11, main oil back chamber 12 and primary feedback oil pocket 13；Can by main reversing valve bar 9
Control main oil suction chamber 10, primary feedback oil pocket 13, main oil back chamber 12 and working oil chamber 11 mutual it
Between connected relation.Such as: main oil suction chamber 10 and the connection of working oil chamber 11, main oil back chamber
12 with the connection of working oil chamber 11, and the connection of primary feedback oil pocket 13 and working oil chamber 11
Deng.
As in figure 2 it is shown, pressure compensation valve opening 7 and its internal pressure compensation valve rod 19 arranged
Between at least can form recuperation valve oil suction chamber 14, recuperation valve goes out oil pocket 15, control chamber, spring side
16 and without control chamber, spring side；By pressure compensation valve rod 19, it is possible to regulation recuperation valve oil suction chamber
14 and recuperation valve go out the flow between oil pocket 15.
At least can form spring side between unidirectional valve opening 8 and its internal unidirectional valve rod and go out oil pocket
With without spring side oil suction chamber.
As shown in Figure 1 and Figure 2, oil-in 2 connects with recuperation valve oil suction chamber 14, and recuperation valve goes out
Oil pocket 15 connects with main oil suction chamber 10；Actuator port 3 and working oil chamber 11 and primary feedback oil pocket
13 connections, oil return opening 4 connects with main oil back chamber 12, and pressure signal mouth 5 is fuel-displaced with spring side
Chamber connects, and primary feedback oil pocket 13 connects with control chamber, spring side 16 with without spring side oil suction chamber.
The load sensing multi-way valve commutation connection valve body that the present invention provides, the main reversing valve hole 6 that it includes
And communicate therewith oil pocket, pressure compensation valve opening 7 and the oil pocket communicated therewith, pressure signal mouth 5,
The repairing valve opening 21 of plug-in and actuator port 3 etc., when being used for making commutation connection work, it is ensured that master changes
The pressure reduction imported and exported to valve opening 6 is constant, makes each commutation connection to work independently from each other, the flow of system
The most relevant with the impulse stroke of main reversing valve bar 9, and use one-way valve structures to replace shuttle valve to select
Load sensing multi-way valve the highest Ls pressure signal, simplifies banked direction control valves oil duct, is structurally easier to
Make integral multitandem valve, rational in infrastructure, compact, it is simple to install, convenient maintenance.
It should be understood that the banked direction control valves commutation connection valve that all employing equivalents or equivalent transformation are formed
Body structure, all falls within the protection domain of application claims.
The load sensing multi-way valve provided in the present invention commutates in the illustrative examples joining valve body, work
Making can be by being arranged on the oil within main reversing valve bar 9 between hydraulic fluid port 3 and primary feedback oil pocket 13
Road 17 connects.
As in figure 2 it is shown, the load sensing multi-way valve commutation in present invention offer joins the schematic of valve body
In embodiment, pressure compensation valve rod 19 can be provided with the oil through connected with oil-in 2,
Oil through also connects with the oil duct 18 within pressure compensation valve rod 19, pressure compensation valve rod 19
Internal oil duct 18 connects without control chamber, spring side.Under original state, the pressure that oil-in 2 provides
Power oil can enter the oil duct 18 within pressure compensation valve rod 19 by oil through, subsequently into
Control chamber, side without spring, promotes pressure compensation valve rod 19, makes oil-in 2 by recuperation valve oil-feed
Chamber 14 goes out oil pocket 15 and connects with recuperation valve.
The load sensing multi-way valve provided in the present invention commutates in the illustrative examples joining valve body, main
By being arranged on the damping in valve block body 1 between feedback oil pocket 13 and control chamber, spring side 16
Duct 20 connects, for the Ls highest signal of primary feedback oil pocket 13 is introduced pressure compensation valve opening
The right-hand member of 7.
The load sensing multi-way valve provided in the present invention commutates in the illustrative examples joining valve body, valve
Being also provided with repairing valve opening 21 on sheet body 1, repairing valve opening 21 is thread cartridge hole, its
It is a general module, can needing installation overload oil compensating valve or installing Fill valve according to actuator
Or screw plug (plug can designed, designed) is installed, functionally can select overload oil compensating valve,
The functions such as Fill valve, simple and reliable, make valve body have the advantage of versatility and motility, and drop
Low manufacturing cost.
The load sensing multi-way valve provided in the present invention commutates in the illustrative examples joining valve body, main
Commutation valve opening 6 can axially arranged along valve block body 1, and may be located at valve block body 1
Middle part.Pressure compensation valve opening 7 can axially arranged along valve block body 1, and may be located at master
The side of commutation valve opening 6, actuator port 3 and oil return opening 4 may be located at main reversing valve hole 6
Opposite side.Unidirectional valve opening 8 can being radially arranged along valve block body 1, and pressure can be arranged on
The end of force compensating valve opening.
One, preferably or in alternative embodiment, actuator port 3 and oil return opening 4 all can arrange two
Individual, two actuator ports 3 and two oil return openings 4 are arranged at the side in main reversing valve hole 6.
Two working oils can be formed between main reversing valve hole 6 and its internal main reversing valve bar 9 arranged
Chamber 11 and two main oil back chambers 12, each actuator port 3 can corresponding connection one working oil chamber
11, each oil return opening 4 can corresponding connection one main oil back chamber 12.Can set on valve block body 1
It is equipped with two repairing valve openings 21, each repairing valve opening 21 correspondence and an actuator port 3 and one time
Hydraulic fluid port 4 connects.
The load sensing multi-way valve commutation connection that the present invention provides includes bearing in any of the above-described embodiment
Carry sensing multi-way valve commutation connection valve body.
The load sensing multi-way valve provided in the present invention commutates in the illustrative examples joined, and loads quick
Main reversing valve bar 9 formation can be arranged in the main reversing valve hole 6 of sense banked direction control valves commutation connection valve body to change
To valve 22；In the pressure compensation valve opening 7 of load sensing multi-way valve commutation connection valve body, pressure can be set
Force compensating valve rod 19 forms pressure-compensated valve 23；Load sensing multi-way valve commutation joins the unidirectional of valve body
In valve opening 8, check valve bar can be set and form the first check valve 24.
In above-mentioned each illustrative examples, can be by being arranged on valve block originally between each hydraulic fluid port, chamber
Oil duct connection in body 1.
In above-mentioned each illustrative examples, valve body bottom righthand side arranges and acts on the Ls on load sensitive pump
Pressure signal passage, is used for connecting each commutation connection Ls pressure oil circuit.
The work process of the present invention is: the pressure oil that oil-in 2 attracts, by pressure compensation valve rod
Oil duct 18 within 19 acts on the control chamber, side without spring of the left end of pressure compensation valve rod 19, main
The Ls pressure oil that feedback oil pocket 13 attracts acts on the right-hand member spring side of pressure compensation valve rod 19 and controls
Chamber 16, and the fluctuation of Ls pressure signal is filtered by the damping 26 being arranged in damping duct 20,
Before and after the spring of pressure compensation valve rod 19 right-hand member makes main reversing valve bar 9, pressure reduction keeps constant, so that
Flow to the flow of actuator port 3 only with the throttling channel opening of main reversing valve bar 9 is relevant.Actuator port 3
Load pressure oil through main reversing valve bar 9 internal galleries enter primary feedback oil pocket 13, then pass through
First check valve 24 flows into Ls pressure signal mouth 5 and feeds back to the Ioad-sensing control mouth of pump, controls
Variable pump pivot angle changes, thus realizes the load-sensitive function of system.
When actuator oil circuit pressure flies up, the pressure oil of actuator port 3 connection can be by mending
Fuel tap hole 21 enters oil return opening 4.When negative pressure emptying phenomenon occurs in actuator oil circuit, with oil return
The low pressure oil of mouth 4 connection are by repairing valve opening 21 repairing in actuator port 3, and repairing valve opening
21 functionally can also select the pick-and-place components such as Fill valve, overload oil compensating valve or screwed plug, simply may be used
Lean on, make valve body have the advantage of versatility and motility, reduce manufacturing cost simultaneously.
As it is shown on figure 3, for a specific embodiment former of load sensing multi-way valve of the present invention commutation connection
Reason schematic diagram, in this specific embodiment, load sensing multi-way valve commutation connection include reversal valve 22,
First check valve 24 and pressure-compensated valve 23, pressure-compensated valve 23 connects reversal valve 22 and oil
Pump, reversal valve 22 connects actuator, and the first check valve 24 connects Ls pressure oil duct and commutation
Valve 22, on the oil circuit that the first check valve 24 connects with reversal valve 22, the most other being connected to connects pressure
The oil circuit in the control chamber, spring side 16 of recuperation valve 23.The oil that reversal valve 22 connects with actuator
(shown in Fig. 3 is to arrange overload oil compensating valve 25, actual to be connected to overload oil compensating valve 25 by road
In work process, it is also possible to be arranged as required to Fill valve or screw plug), overload repairing
The oil outlet end connection fuel tank of valve 25.Connect with the control chamber, spring side 16 of pressure-compensated valve 23
Damping 26 it is provided with on oil circuit.Reversal valve 22 can be three seven and lead to pilot operated directional control valve.
Pressure-compensated valve 23 can include air relief valve, and the oil-in of air relief valve connects with oil pump, subtracts
The oil-out of pressure valve connects with reversal valve 22.Pressure-compensated valve 23 can also include that second is unidirectional
Valve, the oil-in of the second check valve connects with the oil-in of air relief valve, the second check valve fuel-displaced
Mouth connects with the oil-out of air relief valve.
Overload oil compensating valve 25 can include precursor overflow valve and the 3rd check valve of parallel communication, first
Lead the oil-in of overflow valve and the oil-out connection reversal valve 22 of the 3rd check valve and actuator
Between oil circuit, the oil-in connection fuel tank of the oil-out of precursor overflow valve and the 3rd check valve.
As it is shown on figure 3, the specific embodiment that the load sensing multi-way valve commutation that the present invention provides joins
Work process be: commutation connection work time, pressure oil from oil inlet P enter, arrive pressure mend
Repay one end of valve 23, the other end effect Ls pressure of pressure-compensated valve 23, pressure-compensated valve 23
Before and after the spring of end makes commutation connection main valve plug, pressure reduction keeps constant, so that commutation connection working flow
Only relevant with the throttling channel opening of commutation connection main valve plug, and unrelated with load, and when Ls pressure is big
When the pressure of fuel feeding end, pressure-compensated valve 23 stops the oil of load end to blow back into oil inlet P, from
And make load pressure be maintained, and by the pressure oscillation of damping 26 filtration Ls signal, increase
The stationarity of hydraulic system.
In the hydraulic system that the load sensing multi-way valve commutation using the present invention to provide joins, can be in parallel
Two or more load sensing multi-way valve commutation connection is set.Ls pressure oil is unidirectional by first
Valve 24 flows into oil duct, is used for comparing the Ls pressure of each commutation connection, thus obtains maximum
Ls pressure, feeds back to pump load sensitivity through banked direction control valves first and controls mouth, and control variable pump pivot angle changes,
Thus realize the load-sensitive function of system.
Abnormal pressure, mistake will be produced when actuator equipment is by the impulsive force of extraneous exception
Carry Fill valve 25 to open, abnormal pressure is unloaded oil sump tank, when actuator equipment produces negative pressure
Time, fluid is supplemented back negative pressuren zone from fuel tank pipeline by overload oil compensating valve 25, to avoid the formation of vacuum,
Produce cavitation erosion.
By the description of each embodiment above-mentioned, the present invention can be derived and at least have the advantage that
1) the load sensing multi-way valve commutation connection valve body that the present invention provides, valve block body that it includes,
Main reversing valve hole and the oil pocket communicated therewith, pressure compensation valve opening and the oil pocket communicated therewith, pressure
Signal port, repairing valve opening and actuator port etc., its oil duct is simple, rational in infrastructure, compact, it is simple to
Install, convenient maintenance.
2) the load sensing multi-way valve commutation connection valve body that the present invention provides, can be born by the highest Ls
Carry pressure signal and select oil circuit, use one-way valve structures to replace shuttle valve of the prior art to select to bear
Carry sensing multi-way valve the highest Ls pressure signal, simplify banked direction control valves oil duct, be structurally easier to do
Integral formula banked direction control valves.
3) the load sensing multi-way valve commutation connection valve body that the present invention provides, enters at Ls highest signal
The damping duct installing damping it is provided with, when changing on the oil circuit in the control chamber, spring side of pressure-compensated valve
When connection work, the damping installed in hole can filter Ls pressure feedback bearing to control chamber, spring side
Carry impact, decrease the fluctuation of pressure-compensated valve, reduce banked direction control valves pressure wave in the course of the work
Dynamic.
4) the load sensing multi-way valve commutation connection valve body that the present invention provides, when commutation connection work,
Functionally can select the functions such as overload oil compensating valve, Fill valve or screwed plug, simple and reliable, make
Valve body has the advantage of versatility and motility, and reduces manufacturing cost.
5) the load sensing multi-way valve commutation connection valve body that the present invention provides is many by above load-sensitive
The combination of road valve commutation connection valve body difference in functionality and structure can realize the hydraulic system control of different main frame
Demand processed, it is achieved multi-purpose valve, reduces the processing and manufacturing cost of multiple directional control valve.
In sum, the load sensing multi-way valve commutation connection valve body that the present invention provides, oil duct is simple,
Rational in infrastructure, compact, it is simple to install, convenient maintenance.
In accompanying drawing 3, A1, B1 represent actuator port；T represents oil return opening；Ls represents that pressure is believed
Number mouth；P represents oil-in；A1, b1 represent the pilot control opening of reversal valve 22.
In describing the invention, it is to be understood that use " first ", " second ", " the 3rd "
Parts are limited, it is only for be easy to above-mentioned parts is distinguished, as not having Deng word
Stated otherwise, above-mentioned word is had not to have particular meaning, therefore it is not intended that the present invention is protected
Protect the restriction of scope.
Finally should be noted that: above example only in order to technical scheme to be described rather than
It is limited；Although the present invention being described in detail with reference to preferred embodiment, art
Those of ordinary skill it is understood that still the detailed description of the invention of the present invention can be modified
Or portion of techniques feature is carried out equivalent；Without deviating from the spirit of technical solution of the present invention,
It all should be contained in the middle of the technical scheme scope that the present invention is claimed.
Claims (13)
1. a load sensing multi-way valve commutation connection valve body, it is characterised in that: include valve block body
(1), described valve block body (1) is provided with oil-in (2), actuator port (3),
Oil return opening (4) and pressure signal mouth (5), be provided with main commutation in described valve block body (1)
Valve opening (6), pressure compensation valve opening (7) and unidirectional valve opening (8)；
Between described main reversing valve hole (6) and its internal main reversing valve bar (9) arranged at least
Main oil suction chamber (10), working oil chamber (11), main oil back chamber (12) and master can be formed anti-
Feedback oil pocket (13)；By described main reversing valve bar (9) can control described main oil suction chamber (10),
Described primary feedback oil pocket (13), described main oil back chamber (12) and described working oil chamber (11)
Connected relation each other；
Between described pressure compensation valve opening (7) and its internal pressure compensation valve rod (19) arranged
At least can form recuperation valve oil suction chamber (14), recuperation valve goes out oil pocket (15), the control of spring side
Chamber processed (16) and without control chamber, spring side；By described pressure compensation valve rod (19), it is possible to
Regulate described recuperation valve oil suction chamber (14) and described recuperation valve goes out the flow between oil pocket (15)；
Spring side at least can be formed between described unidirectional valve opening (8) and its internal unidirectional valve rod
Go out oil pocket and without spring side oil suction chamber；
Described oil-in (2) connects with described recuperation valve oil suction chamber (14), and described recuperation valve goes out
Oil pocket (15) connects with described main oil suction chamber (10)；Described actuator port (3) and described work
Making oil pocket (11) to connect with described primary feedback oil pocket (13), described oil return opening (4) is with described
Main oil back chamber (12) connects, and described pressure signal mouth (5) goes out oil pocket with described spring side and connects,
Described primary feedback oil pocket (13) is entered with control chamber, described spring side (16) and described side without spring
Oil pocket connects.
2. load sensing multi-way valve commutation connection valve body as claimed in claim 1, it is characterised in that:
Change by being arranged on described master between described actuator port (3) and described primary feedback oil pocket (13)
To the oil duct connection that valve rod (9) is internal.
3. load sensing multi-way valve commutation connection valve body as claimed in claim 1, it is characterised in that:
It is provided with, on described pressure compensation valve rod (19), the oil through connected with described oil-in (2),
Described oil through also connects with the oil duct inside described pressure compensation valve rod (19), described pressure
Compensate the internal oil duct of valve rod (19) to connect without control chamber, spring side.
4. load sensing multi-way valve commutation connection valve body as claimed in claim 1, it is characterised in that:
By being arranged between described primary feedback oil pocket (13) and control chamber, described spring side (16)
State damping duct (20) connection in valve block body (1).
5. the load sensing multi-way valve commutation connection valve body as described in any one of claim 1-4, its
It is characterised by: on described valve block body (1), be additionally provided with repairing valve opening (21), described repairing
Valve opening (21) is thread cartridge hole, is used for installing Fill valve, overload oil compensating valve or screw thread in it
Plug.
6. load sensing multi-way valve commutation connection valve body as claimed in claim 1, it is characterised in that:
Described main reversing valve hole (6) is axially arranged along described valve block body (1), and is positioned at described
The middle part of valve block body (1).
7. load sensing multi-way valve commutation connection valve body as claimed in claim 6, it is characterised in that:
Described pressure compensation valve opening (7) is axially arranged along described valve block body (1), and is positioned at institute
State the side of main reversing valve hole (6), described actuator port (3) and described oil return opening (4) position
Opposite side in described main reversing valve hole (6).
8. load sensing multi-way valve commutation connection valve body as claimed in claim 7, it is characterised in that:
Described unidirectional valve opening (8) being radially arranged along described valve block body (1), and it is arranged on described
The end of pressure compensation valve opening (7).
9. load sensing multi-way valve commutation connection valve body as claimed in claim 1, it is characterised in that:
Described actuator port (3) and described oil return opening (4) are two, described main reversing valve hole (6)
And formed between its internal main reversing valve bar (9) arranged two described working oil chambers (11) and
Two described main oil back chambers (12), each described actuator port (3) is corresponding connects work described in
Make oil pocket (11), main oil back chamber (12) described in the corresponding connection one of each described oil return opening (4).
10. load sensing multi-way valve commutation connection valve body as claimed in claim 5, its feature exists
In: it is provided with two repairing valve openings (21) on described valve block body (1).
11. 1 kinds of load sensing multi-way valve commutation connection, it is characterised in that: include such as claim 1-10
Load sensing multi-way valve commutation connection valve body described in any one.
12. load sensing multi-way valve as claimed in claim 11 commutation connection, it is characterised in that:
In the main reversing valve hole (6) of described load sensing multi-way valve commutation connection valve body, main reversing valve bar is set
(9) reversal valve (22) is formed；The pressure compensation of described load sensing multi-way valve commutation connection valve body
Pressure compensation valve rod (19) is set in valve opening (7) and forms pressure-compensated valve (23)；Described negative
In carrying the unidirectional valve opening (8) of sensing multi-way valve commutation connection valve body, check valve bar is set and forms check valve.
13. load sensing multi-way valve as claimed in claim 12 commutation connection, it is characterised in that:
In the repairing valve opening (21) of described load sensing multi-way valve commutation connection valve body, Fill valve, overload are installed
Fill valve or screw plug.
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| CN201510023298.2A CN105840571B (en) | 2015-01-16 | 2015-01-16 | Load sensing multi-way valve commutation connection valve body and load sensing multi-way valve commutation connection |
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| CN105840571A true CN105840571A (en) | 2016-08-10 |
| CN105840571B CN105840571B (en) | 2017-11-21 |
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| CN107269612A (en) * | 2016-09-13 | 2017-10-20 | 江苏恒立液压科技有限公司 | Load sensing multi-way valve system |
| 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 |
| CN108894982A (en) * | 2018-08-21 | 2018-11-27 | 湖南机油泵股份有限公司 | A kind of variable displacement vane pump with sealing compensation function |
| CN109442061A (en) * | 2018-12-27 | 2019-03-08 | 山西双环重工集团有限公司 | Three seven port valves and stamping equipment |
| CN109881734A (en) * | 2019-03-20 | 2019-06-14 | 江苏徐工工程机械研究院有限公司 | Work connection, multi-way valve and excavator |
| CN112555214A (en) * | 2020-12-10 | 2021-03-26 | 山东泰丰智能控制股份有限公司 | Three-port two-way constant pressure difference valve |
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