CN105840571B - Load sensing multi-way valve commutation connection valve body and load sensing multi-way valve commutation connection - Google Patents
Load sensing multi-way valve commutation connection valve body and load sensing multi-way valve commutation connection Download PDFInfo
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- CN105840571B CN105840571B CN201510023298.2A CN201510023298A CN105840571B CN 105840571 B CN105840571 B CN 105840571B CN 201510023298 A CN201510023298 A CN 201510023298A CN 105840571 B CN105840571 B CN 105840571B
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Abstract
Commutated the present invention relates to a kind of load sensing multi-way valve and join valve body and load sensing multi-way valve commutation connection, wherein, load sensing multi-way valve commutation connection valve body includes valve block body, oil inlet, actuator port, oil return opening and pressure signal mouth are provided with valve block body, main reversing valve hole, pressure compensation valve opening and unidirectional valve opening are provided with valve block body；Main oil suction chamber, working oil chamber, main oil back chamber and primary feedback oil pocket can be at least formed between main reversing valve hole and its internal main reversing valve bar set；Recuperation valve oil suction chamber, recuperation valve oil outlet chamber, spring side control chamber and without spring side control chamber can be at least formed between pressure compensation valve opening and its internal pressure compensation valve rod set；Spring side oil outlet chamber can be at least formed between unidirectional valve opening and its internal unidirectional valve rod and without spring side oil suction chamber.The present invention can ensure that the pressure difference of main reversing valve hole inlet and outlet is constant, each commutation connection is worked independently, flow system flow is only relevant with the impulse stroke of main reversing valve bar.
Description
Technical field
The present invention relates to engineering machinery field, more particularly to a kind of load sensing multi-way valve commutation connection valve body and load-sensitive
Banked direction control valves commutation connection.
Background technology
Load sensitive system is that one kind experiences system pressure-traffic demand, and only provides required flow and pressure
Hydraulic circuit.Load sensing multi-way valve is the core parts of construction machinery hydraulic system, between pump and executive component, when each
When executive component works, working flow is only related to valve element aperture, and unrelated with load pressure.Load sensing multi-way valve valve at present
Although external shape is simple, its internal galleries is designed with different complicated inner cavity and long narrow special-shaped hole slot, casting technique pole
Complicated and poor universality, therefore, design structure is reasonable, compact, versatile, and the multi-way valve body of dependable performance is in engineering machinery
There is very big practical value in field.
Current load sensing multi-way valve commutation connection, its valve body include controlling the guiding valve of each executing agency, shuttle valve, unidirectional
Valve, safety overflow valve and oil duct etc., when commutation joins work, the pressure of actuator port is entered by the oilhole on corresponding reversal valve valve rod
Enter signal oil pocket, then drawn through shuttle valve, operating oil pressure is that signal oil pressure is delivered to oil-feed connection, then feeds back to load sensitive pump, real
The load-sensitive function of existing system.
The shortcomings that above-mentioned existing load sensing multi-way valve is：
1) for existing multi-way valve body in order to realize Ioad-sensing control, overall structure is larger, occupies more space, structure
It is not compact, bring more inconvenience to installation.
2) selection of load sensing multi-way valve highest Ls (Load sensing, load-sensitive) pressure signal uses shuttle at present
Valve is realized, is selected Ls signal maximum pressures using shuttle valve, is made the banked direction control valves oil duct extremely complex, and is not easy to make monoblock type more
Road valve.
The content of the invention
Commutated the purpose of the present invention is to propose to a kind of load sensing multi-way valve and join valve body and load sensing multi-way valve commutation connection,
Its internal galleries is simple, rational in infrastructure, compact.
To achieve the above object, commutated the invention provides a kind of load sensing multi-way valve and join valve body, it includes valve block sheet
Body, oil inlet, actuator port, oil return opening and pressure signal mouth are provided with the valve block body, is set in the valve block body
There are main reversing valve hole, pressure compensation valve opening and unidirectional valve opening；
Main oil suction chamber, working oil can be at least formed between the main reversing valve hole and its internal main reversing valve bar set
Chamber, main oil back chamber and primary feedback oil pocket；The main oil suction chamber, primary feedback oil can be controlled by the main reversing valve bar
Chamber, the main oil back chamber and the mutual connected relation of the working oil chamber；
Recuperation valve oil-feed can be at least formed between the pressure compensation valve opening and its internal pressure compensation valve rod set
Chamber, recuperation valve oil outlet chamber, spring side control chamber and without spring side control chamber；By the pressure compensation valve rod, institute can be adjusted
State the flow between recuperation valve oil suction chamber and the recuperation valve oil outlet chamber；
Spring side oil outlet chamber can be at least formed between the unidirectional valve opening and its internal unidirectional valve rod and without spring side
Oil suction chamber；
The oil inlet connects with the recuperation valve oil suction chamber, and the recuperation valve oil outlet chamber connects with the main oil suction chamber；
The actuator port connects with the working oil chamber and the primary feedback oil pocket, and the oil return opening connects with the main oil back chamber,
The pressure signal mouth connects with spring side oil outlet chamber, the primary feedback oil pocket and spring side control chamber and the nothing
The oil suction chamber connection of spring side.
It is described by being arranged between the actuator port and the primary feedback oil pocket one preferably or in alternative embodiment
Oil duct connection inside main reversing valve bar.
Preferably or in alternative embodiment, the logical oil connected with the oil inlet is provided with the pressure compensation valve rod one
Hole, the oil-through-hole also connect with the oil duct inside the pressure compensation valve rod, and the oil duct inside the pressure compensation valve rod connects
Lead to without spring side control chamber.
One preferably or in alternative embodiment, by being arranged between the primary feedback oil pocket and spring side control chamber
The intrinsic damping hole link of valve block.
Preferably or in alternative embodiment, repairing valve opening is additionally provided with the valve block body, the repairing valve opening is one
Thread cartridge hole, it is interior for installing Fill valve, overload oil compensating valve or screw plug.
One preferably or in alternative embodiment, the main reversing valve hole is axially arranged along the valve block body, and is located at
The middle part of the valve block body.
One preferably or in alternative embodiment, the pressure compensation valve opening is axially arranged along the valve block body, and position
In the side in the main reversing valve hole, the actuator port and the oil return opening are located at the opposite side in the main reversing valve hole.
One preferably or in alternative embodiment, unidirectional valve opening being radially arranged along the valve block body, and be arranged on
The end of the pressure compensation valve opening.
One preferably or in alternative embodiment, the actuator port and the oil return opening are two, the main reversing valve
Two working oil chambers and two main oil back chambers are formed between the main reversing valve bar set inside Kong Yuqi, it is each described
Actuator port one working oil chamber of corresponding connection, the one main oil back chamber of each corresponding connection of the oil return opening.
Preferably or in alternative embodiment, two repairing valve openings are provided with the valve block body one.
To achieve the above object, present invention also offers a kind of commutation of load sensing multi-way valve to join, and it includes any of the above-described
Load sensing multi-way valve commutation connection valve body in embodiment.
One preferably or in alternative embodiment, set in the main reversing valve hole of the load sensing multi-way valve commutation connection valve body
Main reversing valve bar forms reversal valve；Pressure compensation is set in the pressure compensation valve opening of the load sensing multi-way valve commutation connection valve body
Valve rod forms pressure-compensated valve；Check valve bar is set to form list in the unidirectional valve opening of the load sensing multi-way valve commutation connection valve body
To valve.
One preferably or in alternative embodiment, install and mend in the repairing valve opening of the load sensing multi-way valve commutation connection valve body
Fuel tap, overload oil compensating valve or screw plug.
Based on above-mentioned technical proposal, the present invention at least has the advantages that：
Load sensing multi-way valve commutation connection valve body provided by the invention can ensure that the pressure difference of main reversing valve hole inlet and outlet is permanent
It is fixed, each commutation connection is worked independently from each other, the flow of system is only relevant with the impulse stroke of main reversing valve bar, and using unidirectional
Valve arrangement replaces shuttle valve to select load sensing multi-way valve highest Ls pressure signals, simplifies banked direction control valves oil duct, in structure more
Integral multitandem valve is may be readily formed as, it is rational in infrastructure, compact, it is easily installed, convenient maintenance.
Brief description of the drawings
Accompanying drawing described herein is used for providing a further understanding of the present invention, forms the part of the application, this hair
Bright schematic description and description is used to explain the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is the schematic cross-sectional view of load sensing multi-way valve provided by the invention commutation connection valve body；
Fig. 2 is the schematic cross-sectional view of load sensing multi-way valve provided by the invention commutation connection；
Fig. 3 is the hydraulic principle schematic diagram of load sensing multi-way valve provided by the invention commutation connection.
Label in accompanying drawing：
1- valve block bodies；2- oil inlets；3- actuator ports；4- oil return openings；5- pressure signal mouths；6- main reversing valves hole；7-
Pressure compensation valve opening；The unidirectional valve openings of 8-；9- main reversing valve bars；The main oil suction chambers of 10-；11- working oil chambers；The main oil back chambers of 12-；13-
Primary feedback oil pocket；14- recuperation valve oil suction chambers；15- recuperation valve oil outlet chambers；16- springs side control chamber；Inside 17- main reversing valve bars
Oil duct；Oil duct inside 18- pressure compensation valve rods；19- pressure compensation valve rods；20- damps duct；21- repairing valve openings；22-
Reversal valve；23- pressure-compensated valves；The check valves of 24- first；25- overload oil compensating valves；26- is damped.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in embodiment is clearly and completely retouched
State.Obviously, described embodiment is only the part of the embodiment of the present invention, rather than whole embodiments.Based on this hair
Bright embodiment, the every other implementation that those of ordinary skill in the art are obtained under the premise of creative work is not made
Example, belongs to the scope of protection of the invention.
In the description of the invention, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", "front", "rear",
The orientation or position relationship of the instruction such as "left", "right", " vertical ", " level ", " top ", " bottom ", " interior ", " outer " is based on accompanying drawing institutes
The orientation or position relationship shown, it is for only for ease of the description present invention and simplifies description, rather than instruction or the dress for implying meaning
Put or element there must be specific orientation, with specific azimuth configuration and operation, therefore it is not intended that the present invention is protected
The limitation of scope.
As shown in figure 1, the illustrative examples for the connection valve body that commutated for load sensing multi-way valve provided by the invention, show at this
Meaning property embodiment in, load sensing multi-way valve commutation connection valve body include valve block body 1, be provided with valve block body 1 oil inlet 2,
Actuator port 3, oil return opening 4 and pressure signal mouth 5, main reversing valve hole 6, pressure compensation valve opening 7 and single are provided with valve block body 1
To valve opening 8；Wherein, actuator port 3 is used to be connected with executing agency.
It is used to set main reversing valve bar 9 (as shown in Figure 2), main reversing valve hole 6 and its internal setting in main reversing valve hole 6
Main oil suction chamber 10, working oil chamber 11, main oil back chamber 12 and primary feedback oil pocket 13 can be at least formed between main reversing valve bar 9；It is logical
Crossing main reversing valve bar 9 can control main oil suction chamber 10, primary feedback oil pocket 13, main oil back chamber 12 and working oil chamber 11 mutual
Connected relation.Such as：The connection of main oil suction chamber 10 and working oil chamber 11, the connection of main oil back chamber 12 and working oil chamber 11, and
Connection of primary feedback oil pocket 13 and working oil chamber 11 etc..
As shown in Fig. 2 it can at least form benefit between pressure compensation valve opening 7 and its internal pressure compensation valve rod 19 set
Repay valve oil suction chamber 14, recuperation valve oil outlet chamber 15, spring side control chamber 16 and without spring side control chamber；Pass through pressure compensation valve rod
19, the flow between recuperation valve oil suction chamber 14 and recuperation valve oil outlet chamber 15 can be adjusted.
Spring side oil outlet chamber can be at least formed between unidirectional valve opening 8 and its internal unidirectional valve rod and without the oil-feed of spring side
Chamber.
As shown in Figure 1 and Figure 2, oil inlet 2 connects with recuperation valve oil suction chamber 14, recuperation valve oil outlet chamber 15 and main oil suction chamber 10
Connection；Actuator port 3 connects with working oil chamber 11 and primary feedback oil pocket 13, and oil return opening 4 connects with main oil back chamber 12, pressure signal
Mouth 5 connects with spring side oil outlet chamber, and primary feedback oil pocket 13 connects with spring side control chamber 16 and without spring side oil suction chamber.
Load sensing multi-way valve provided by the invention commutation connection valve body, its main reversing valve hole 6 included and is communicated therewith
Oil pocket, pressure compensation valve opening 7 and the oil pocket communicated therewith, pressure signal mouth 5, the repairing valve opening 21 and actuator port 3 of plug-in
Deng during for making commutation join work, ensureing that the pressure difference of the inlet and outlet of main reversing valve hole 6 is constant, making each commutation connection can separate work
Make, the flow of system is only relevant with the impulse stroke of main reversing valve bar 9, and replaces shuttle valve to select to load using one-way valve structures
Sensing multi-way valve highest Ls pressure signals, simplify banked direction control valves oil duct, are easier to make integral multitandem valve, structure in structure
Rationally, it is compact, it is easily installed, convenient maintenance.
It should be noted that：All banked direction control valves commutation connection valve body structures formed using equivalent substitution or equivalent transformation, are fallen
In the protection domain of application claims.
In the illustrative examples that load sensing multi-way valve provided by the invention commutates connection valve body, actuator port 3 and master
It can be connected between feedback oil pocket 13 by being arranged on the oil duct 17 inside main reversing valve bar 9.
As shown in Fig. 2 in the illustrative examples that load sensing multi-way valve provided by the invention commutates connection valve body, pressure
Can be provided with the oil-through-hole connected with oil inlet 2 on compensation valve rod 19, oil-through-hole also with the oil inside pressure compensation valve rod 19
Road 18 connects, and the oil duct 18 inside pressure compensation valve rod 19 connects no spring side control chamber.Under original state, oil inlet 2 provides
The oil duct 18 that can be entered by oil-through-hole inside pressure compensation valve rod 19 of pressure oil, subsequently into without spring side control chamber,
Pressure compensation valve rod 19 is promoted, oil inlet 2 is connected by recuperation valve oil suction chamber 14 with recuperation valve oil outlet chamber 15.
Load sensing multi-way valve provided by the invention commutate connection valve body illustrative examples in, primary feedback oil pocket 13 with
Connected between spring side control chamber 16 by the damping duct 20 being arranged in valve block body 1, for by primary feedback oil pocket 13
Ls highest signals introduce the right-hand member of pressure compensation valve opening 7.
In the illustrative examples that load sensing multi-way valve provided by the invention commutates connection valve body, on valve block body 1 also
Repairing valve opening 21 can be provided with, repairing valve opening 21 is thread cartridge hole, and it is a general module, can be according to the need of executing agency
Overload oil compensating valve is installed Fill valve or installation screw plug (plug can designed, designed) are either installed, can functionally selected
The functions such as overload oil compensating valve, Fill valve are selected, it is simple and reliable, make valve body that there is the advantages of versatility and flexibility, and reduce
Manufacturing cost.
In the illustrative examples that load sensing multi-way valve provided by the invention commutates connection valve body, main reversing valve hole 6 can
With along the axially arranged of valve block body 1, and the middle part of valve block body 1 can be located at.Pressure compensation valve opening 7 can be along valve block body
1 it is axially arranged, and can be located at main reversing valve hole 6 side, actuator port 3 and oil return opening 4 can be located at main reversing valve hole 6
Opposite side.Unidirectional valve opening 8 being radially arranged along valve block body 1, and the end of pressure compensation valve opening can be arranged on.
One preferably or in alternative embodiment, actuator port 3 and oil return opening 4 can set two, two actuator ports 3
The side in main reversing valve hole 6 is arranged at two oil return openings 4.Main reversing valve hole 6 and its internal main reversing valve bar 9 set it
Between can form two working oil chambers 11 and two main oil back chambers 12, each actuator port 3 can correspond to one working oil chamber of connection
11, each oil return opening 4 can correspond to one main oil back chamber 12 of connection.Two repairing valve openings 21 can be provided with valve block body 1, often
One repairing valve opening 21 is corresponding to be connected with an actuator port 3 and an oil return opening 4.
Load sensing multi-way valve commutation connection provided by the invention includes the load sensing multi-way valve in any of the above-described embodiment
Commutation connection valve body.
In the illustrative examples of load sensing multi-way valve provided by the invention commutation connection, load sensing multi-way valve commutation
Joining can set main reversing valve bar 9 to form reversal valve 22 in the main reversing valve hole 6 of valve body；Load sensing multi-way valve commutation connection valve body
Pressure compensation valve opening 7 in can set pressure compensation valve rod 19 formed pressure-compensated valve 23；Load sensing multi-way valve commutation connection
Check valve bar can be set to form the first check valve 24 in the unidirectional valve opening 8 of valve body.
In above-mentioned each illustrative examples, it can be connected between each hydraulic fluid port, chamber by the oil duct being arranged in valve block body 1
It is logical.
In above-mentioned each illustrative examples, valve body bottom righthand side sets the Ls pressure signals acted on load sensitive pump to lead to
Road, for connecting each commutation connection Ls pressure oil circuits.
The present invention the course of work be：The pressure oil that oil inlet 2 attracts, pass through the oil duct 18 inside pressure compensation valve rod 19
Act on the left end of pressure compensation valve rod 19 without spring side control chamber, the Ls pressure oils that primary feedback oil pocket 13 attracts act on pressure
The right-hand member spring side control chamber 16 of force compensating valve rod 19, and Ls pressure is filtered by the damping 26 in damping duct 20 and believed
Number fluctuation, pressure difference keeps constant before and after the spring of the right-hand member of pressure compensation valve rod 19 makes main reversing valve bar 9, so that flowing to work
The flow of hydraulic fluid port 3 is only relevant with the throttling channel opening of main reversing valve bar 9.The load pressure oil of actuator port 3 is through main reversing valve bar 9
Internal galleries enter primary feedback oil pocket 13, then flowing into Ls pressure signals mouth 5 by the first check valve 24 feeds back to the negative of pump
Carry sensitive control mouth, control variable pump pivot angle change, so as to realize the load-sensitive function of system.
When executing agency, oil circuit pressure is flown up, and the pressure oil that actuator port 3 connects can be entered by repairing valve opening 21
Oil return opening 4.When negative pressure emptying phenomenon occurs in executing agency's oil circuit, pass through repairing valve opening 21 with the low pressure oil that oil return opening 4 connects
The repairing into actuator port 3, and repairing valve opening 21 can also functionally select Fill valve, overload oil compensating valve or screwed plug etc.
Pick-and-place components, it is simple and reliable, make valve body that there is the advantages of versatility and flexibility, while reduce manufacturing cost.
As shown in figure 3, the principle schematic of the specific embodiment for load sensing multi-way valve of the present invention commutation connection, at this
In specific embodiment, load sensing multi-way valve commutation connection includes reversal valve 22, the first check valve 24 and pressure-compensated valve 23, pressure
Recuperation valve 23 connects reversal valve 22 and oil pump, and reversal valve 22 connects executing agency, the first check valve 24 connection Ls pressure oil duct and
Reversal valve 22, the also other spring side for being connected to connection pressure-compensated valve 23 on the oil circuit that the first check valve 24 connects with reversal valve 22
The oil circuit of control chamber 16.Side is connected to overload oil compensating valve 25 and (is illustrated that in Fig. 3 on the oil circuit that reversal valve 22 connects with executing agency
Set overload oil compensating valve 25, in practical work process, Fill valve or screw plug can also be arranged as required to), overload is mended
The oil outlet end connection fuel tank of fuel tap 25.Damping is provided with the oil circuit connected with the spring side control chamber 16 of pressure-compensated valve 23
26.Reversal valve 22 can be three seven logical pilot operated directional control valves.
Pressure-compensated valve 23 can include pressure-reducing valve, and the oil inlet of pressure-reducing valve connects with oil pump, the oil-out of pressure-reducing valve with
Reversal valve 22 connects.Pressure-compensated valve 23 can also include the second check valve, the oil inlet of the second check valve and entering for pressure-reducing valve
Hydraulic fluid port connects, and the oil-out of the second check valve connects with the oil-out of pressure-reducing valve.
Overload oil compensating valve 25 can include the precursor overflow valve and the 3rd check valve of parallel communication, the oil-feed of precursor overflow valve
Oil circuit mouthful between the oil-out connection reversal valve 22 of the 3rd check valve and executing agency, the oil-out of precursor overflow valve and the
The oil inlet connection fuel tank of three check valves.
As shown in figure 3, the course of work of a specific embodiment of load sensing multi-way valve commutation connection provided by the invention is：
Commutation join work when, pressure oil from oil inlet P enter, reach pressure-compensated valve 23 one end, pressure-compensated valve 23 it is another
End acts on Ls pressure, and pressure difference keeps constant before and after the spring of the end of pressure-compensated valve 23 makes commutation connection main valve plug, so that commutation
It is only relevant with the throttling channel opening of commutation connection main valve plug to join working flow, and it is unrelated with load, and when Ls pressure is more than fuel feeding
During the pressure at end, pressure-compensated valve 23 prevents the oil of load end from blowing back into oil inlet P, so that load pressure is maintained, and
The pressure oscillation of Ls signals is filtered by damping 26, increases the stationarity of hydraulic system.
In hydraulic system using load sensing multi-way valve provided by the invention commutation connection, two or two can be arranged in parallel
Load sensing multi-way valve commutation connection more than individual.Ls pressure oils flow into oil duct by the first check valve 24, for each commutation is joined
Ls pressure be compared, so as to obtain maximum Ls pressure, feed back to pump load sensitivity control mouth through banked direction control valves first, control
Variable pump pivot angle changes, so as to realize the load-sensitive function of system.
Abnormal pressure will be produced when impulsive force of executing agency's equipment by extraneous exception, overload oil compensating valve 25 is beaten
Open, abnormal pressure is unloaded into oil return box, when executing agency equipment produces negative pressure, overload oil compensating valve 25 is by fluid from tank tube
Road supplements back negative pressuren zone, to avoid the formation of vacuum, produces cavitation erosion.
By the description of above-mentioned each embodiment, it can derive that the present invention at least has advantages below：
1) load sensing multi-way valve provided by the invention commutation connection valve body, its valve block body included, main reversing valve hole and
Oil pocket, pressure compensation valve opening and the oil pocket communicated therewith, pressure signal mouth, repairing valve opening and actuator port for communicating therewith etc.,
Its oil duct is simple, rational in infrastructure, compact, is easily installed, convenient maintenance.
2) load sensing multi-way valve commutation connection valve body provided by the invention, can be selected by highest Ls load pressure signals
Oil circuit, shuttle valve of the prior art is replaced to select load sensing multi-way valve highest Ls pressure signals using one-way valve structures, letter
Banked direction control valves oil duct is changed, has been easier to make integral multitandem valve in structure.
3) load sensing multi-way valve commutation connection valve body provided by the invention, enters the bullet of pressure-compensated valve in Ls highest signals
The damping duct of installation damping is provided with the oil circuit of spring side control chamber, when commutation joins work, the damping installed in hole can
Ls pressure feedbacks are filtered to the load shock of spring side control chamber, reduces the fluctuation of pressure-compensated valve, reduces banked direction control valves in work
Pressure oscillation during work.
4) load sensing multi-way valve commutation connection valve body provided by the invention, when commutation joins work, can functionally be selected
The functions such as overload oil compensating valve, Fill valve or screwed plug are selected, it is simple and reliable, make valve body that there is the advantages of versatility and flexibility,
And reduce manufacturing cost.
5) load sensing multi-way valve commutation connection valve body provided by the invention, is commutated by above load sensing multi-way valve and joins valve
The combination of body difference in functionality and structure can realize the HYDRAULIC CONTROL SYSTEM demand of different main frames, realize multi-purpose valve, reduce more
The processing and manufacturing cost of way reversing valve.
In summary, load sensing multi-way valve commutation connection valve body provided by the invention, oil duct is simple, rational in infrastructure, compact,
It is easily installed, convenient maintenance.
In accompanying drawing 3, A1, B1 represent actuator port；T represents oil return opening；Ls represents pressure signal mouth；P represents oil inlet；
A1, b1 represent the pilot control opening of reversal valve 22.
In the description of the invention, it is to be understood that limit zero using the word such as " first ", " second ", " the 3rd "
Part, it is only for be easy to distinguish above-mentioned parts, such as do not have Stated otherwise, above-mentioned word does not have special contain
Justice, therefore it is not intended that limiting the scope of the invention.
Finally it should be noted that:The above embodiments are merely illustrative of the technical scheme of the present invention and are not intended to be limiting thereof；To the greatest extent
The present invention is described in detail with reference to preferred embodiments for pipe, those of ordinary skills in the art should understand that：Still
The embodiment of the present invention can be modified or equivalent substitution is carried out to some technical characteristics；Without departing from this hair
The spirit of bright technical scheme, it all should cover among the claimed technical scheme scope of the present invention.
Claims (13)
- A kind of 1. load sensing multi-way valve commutation connection valve body, it is characterised in that：Including valve block body (1), the valve block body (1) On be provided with oil inlet (2), actuator port (3), oil return opening (4) and pressure signal mouth (5), set in the valve block body (1) There are main reversing valve hole (6), pressure compensation valve opening (7) and unidirectional valve opening (8)；Can at least be formed between the main reversing valve hole (6) and its internal main reversing valve bar (9) set main oil suction chamber (10), Working oil chamber (11), main oil back chamber (12) and primary feedback oil pocket (13)；The master can be controlled by the main reversing valve bar (9) Oil suction chamber (10), the primary feedback oil pocket (13), the main oil back chamber (12) and the mutual company of the working oil chamber (11) Clearance system；Recuperation valve can be at least formed between the pressure compensation valve opening (7) and its internal pressure compensation valve rod (19) set to enter Oil pocket (14), recuperation valve oil outlet chamber (15), spring side control chamber (16) and without spring side control chamber；Pass through the pressure-compensated valve Bar (19), the flow between the recuperation valve oil suction chamber (14) and the recuperation valve oil outlet chamber (15) can be adjusted；Spring side oil outlet chamber can be at least formed between the unidirectional valve opening (8) and its internal unidirectional valve rod and is entered without spring side Oil pocket；The oil inlet (2) connects with the recuperation valve oil suction chamber (14), the recuperation valve oil outlet chamber (15) and the main oil-feed Chamber (10) connects；The actuator port (3) connects with the working oil chamber (11) and the primary feedback oil pocket (13), the oil return Mouth (4) connects with the main oil back chamber (12), and the pressure signal mouth (5) connects with spring side oil outlet chamber, and the master is anti- Feedback oil pocket (13) connects with spring side control chamber (16) and the no spring side oil suction chamber.
- 2. load sensing multi-way valve commutation connection valve body as claimed in claim 1, it is characterised in that：The actuator port (3) with Connected between the primary feedback oil pocket (13) by being arranged on the internal oil duct of the main reversing valve bar (9).
- 3. load sensing multi-way valve commutation connection valve body as claimed in claim 1, it is characterised in that：The pressure compensation valve rod (19) oil-through-hole connected with the oil inlet (2) is provided with, the oil-through-hole is also interior with the pressure compensation valve rod (19) The oil duct connection in portion, the internal oil duct of the pressure compensation valve rod (19) are connected without spring side control chamber.
- 4. load sensing multi-way valve commutation connection valve body as claimed in claim 1, it is characterised in that：The primary feedback oil pocket (13) Connected between spring side control chamber (16) by the damping duct (20) being arranged in the valve block body (1).
- 5. the load sensing multi-way valve commutation connection valve body as described in claim any one of 1-4, it is characterised in that：The valve block sheet Repairing valve opening (21) is additionally provided with body (1), the repairing valve opening (21) is thread cartridge hole, be used in it installing Fill valve, Overload oil compensating valve or screw plug.
- 6. load sensing multi-way valve commutation connection valve body as claimed in claim 1, it is characterised in that：The main reversing valve hole (6) Along the axially arranged of the valve block body (1), and positioned at the middle part of the valve block body (1).
- 7. load sensing multi-way valve commutation connection valve body as claimed in claim 6, it is characterised in that：The pressure compensation valve opening (7) along the axially arranged of the valve block body (1), and positioned at the side of the main reversing valve hole (6), the actuator port (3) It is located at the opposite side of the main reversing valve hole (6) with the oil return opening (4).
- 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) edge Valve block body (1) is radially arranged, and is arranged on the end of the 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：The actuator port (3) and The oil return opening (4) is two, and two are formed between the main reversing valve hole (6) and its internal main reversing valve bar (9) set The individual working oil chamber (11) and two main oil back chambers (12), one work of each corresponding connection of the actuator port (3) Make oil pocket (11), the one main oil back chamber (12) of each corresponding connection of the oil return opening (4).
- 10. load sensing multi-way valve commutation connection valve body as claimed in claim 5, it is characterised in that：On the valve block body (1) It is provided with two repairing valve openings (21).
- A kind of 11. load sensing multi-way valve commutation connection, it is characterised in that：Including the load as described in claim any one of 1-10 Sensing multi-way valve commutation connection valve body.
- 12. load sensing multi-way valve commutation connection as claimed in claim 11, it is characterised in that：The load sensing multi-way valve changes Main reversing valve bar (9) is set to form reversal valve (22) into the main reversing valve hole (6) of connection valve body；The load sensing multi-way valve changes Pressure compensation valve rod (19) is set to form pressure-compensated valve (23) into the pressure compensation valve opening (7) of connection valve body；The load is quick Feeling in the unidirectional valve opening (8) of banked direction control valves commutation connection valve body sets check valve bar to form check valve.
- 13. load sensing multi-way valve commutation connection as claimed in claim 12, it is characterised in that：The load sensing multi-way valve changes Installation Fill valve, overload oil compensating valve or screw plug into the repairing valve opening (21) of connection valve body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| US11841716B2 (en) | 2020-12-28 | 2023-12-12 | Danfoss Power Solutions (Zhejiang) Co. Ltd. | Load-sensing multi-way valve work section |
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| CN107269612B (en) * | 2016-09-13 | 2019-04-09 | 江苏恒立液压股份有限公司 | Load sensing multi-way valve system |
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| 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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| CN204493323U (en) * | 2015-01-16 | 2015-07-22 | 徐工集团工程机械股份有限公司 | Load sensing multi-way valve commutation connection valve body and load sensing multi-way valve commutation connection |
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| US11841716B2 (en) | 2020-12-28 | 2023-12-12 | Danfoss Power Solutions (Zhejiang) Co. Ltd. | Load-sensing multi-way valve work section |
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