CN105840573B - Load sensing multi-way valve first valve body and load sensing multi-way valve first - Google Patents
Load sensing multi-way valve first valve body and load sensing multi-way valve first Download PDFInfo
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- CN105840573B CN105840573B CN201510024493.7A CN201510024493A CN105840573B CN 105840573 B CN105840573 B CN 105840573B CN 201510024493 A CN201510024493 A CN 201510024493A CN 105840573 B CN105840573 B CN 105840573B
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Abstract
The present invention relates to a kind of load sensing multi-way valve first valve body and load sensing multi-way valve first, wherein, load sensing multi-way valve first valve body includes valve block body, and valve block body is provided with oil inlet, oil return opening, load feedback mouth, the safe valve opening of main and secondary security valve opening；Main oil suction chamber, main oil back chamber, main spring side chamber and main are formed between the safe valve opening of main and main safety lever without spring side chamber；Secondary oil suction chamber, secondary oil back chamber, secondary spring side chamber and secondary are formed between secondary security valve opening and secondary security valve rod without spring side chamber；Damping or stifled is set on the oil duct that oil inlet connects with main spring side chamber and secondary oil suction chamber, it is corresponding, stifled or damping is set on the oil duct that load feedback mouth connects with main spring side chamber and secondary oil suction chamber.The present invention, which need to only exchange stifled and damping position, can just be applicable constant displacement pump load sensitive system or variable pump load sensitive system, enhance the host adaptation of banked direction control valves, realize multi-purpose valve.
Description
Technical field
The present invention relates to engineering machinery field, more particularly to a kind of load sensing multi-way valve first valve body and load-sensitive it is more
Road valve first.
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, 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 first, its valve body include control oil inlet P, oil return inlet T, guide's oil duct, high pressure
Oil duct, low pressure oil duct etc., when first works, the pressure of actuator port passes through the oilhole entering signal oil on corresponding reversal valve valve rod
Chamber, 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, realizes system
Load-sensitive function.
Existing load sensing multi-way valve first, designed more for single engineering machinery main computer boxes, a kind of main computer boxes pair
Answer a kind of load sensing multi-way valve.A kind of demand of main computer boxes function, a kind of corresponding valve body of load sensing multi-way valve first.
Also, the general function only with safety valve, functional form are single.
The content of the invention
The purpose of the present invention is to propose to a kind of load sensing multi-way valve first valve body and load sensing multi-way valve first, its energy
Host adaptation is enough improved, realizes multi-purpose valve.
To achieve the above object, the invention provides a kind of load sensing multi-way valve first valve body, it includes valve block body,
Oil inlet, oil return opening and load feedback mouth are provided with the valve block body, main safety valve is provided with the valve block body
Hole and secondary security valve opening；
Main oil suction chamber, main are at least formed between the safe valve opening of main and its internal main safety lever set
Oil back chamber, main spring side chamber and main are without spring side chamber；The main oil suction chamber is with the oil inlet and the main without bullet
Spring side chamber connects, and the main oil back chamber connects with the oil return opening；
Secondary oil suction chamber, secondary are at least formed between the secondary security valve opening and its internal secondary security valve rod set
Oil back chamber, secondary spring side chamber and secondary are without spring side chamber；The secondary oil suction chamber connects with the secondary without spring side chamber, institute
Secondary oil back chamber is stated to connect with the oil return opening；
The oil inlet is connected by oil duct with the main spring side chamber and the secondary oil suction chamber；The load feedback
Mouth is connected by oil duct with the main spring side chamber and the secondary oil suction chamber；
According to the difference of the pump connected with the oil inlet, selectivity is following to be set：
The oil inlet (5) connects variable pump, in the oil inlet and the main spring side chamber and the secondary oil-feed
Damping is set on the oil duct of chamber connection, connected in the load feedback mouth with the main spring side chamber and the secondary oil suction chamber
Oil duct on set it is stifled；
Or
The oil inlet (5) connects constant displacement pump, in the oil inlet and the main spring side chamber and the secondary oil-feed
Set and block up on the oil duct of chamber connection, connected in the load feedback mouth with the main spring side chamber and the secondary oil suction chamber
Damping is set on oil duct.
One preferably or in alternative embodiment, the oil inlet connects with the main spring side chamber and the secondary oil suction chamber
Logical and setting damping or stifled oil duct are arranged in the main safety lever, the load feedback mouth and the main spring
Side chamber connects with the secondary oil suction chamber and sets stifled or damping oil duct to be arranged in the valve block body.
Preferably or in alternative embodiment, middle position off-load valve opening is additionally provided with the valve block body, the middle position is unloaded one
Middle position off-load oil suction chamber, middle position off-load oil back chamber, middle position are at least formed between lotus valve opening and its internal middle position off-load valve rod to unload
Lotus spring side chamber and middle position off-load without spring side chamber, the middle position off-load oil suction chamber and the oil inlet and the middle position off-load without
Spring side chamber is connected, and the middle position off-load oil back chamber connects with the oil return opening, and the middle position unloading spring side chamber is born with described
Carry feedback port connection.
One preferably or in alternative embodiment, dynamic antivibration valve opening, the dynamic resistance are additionally provided with the valve block body
Dynamic antivibration oil suction chamber, dynamic antivibration oil back chamber are at least formed between Buddhist nun's valve opening and its internal dynamic antivibration valve rod set, is moved
State damping spring side chamber and dynamic antivibration are without spring side chamber；The dynamic antivibration oil suction chamber connects with the oil inlet, described dynamic
Damping duct is provided with the oil duct that state damping oil suction chamber connects with the oil inlet, in the damping duct and the oil inlet
It is other on the oil duct of connection to be connected to the connection oil duct of the dynamic antivibration without spring side chamber, hindered in the damping duct with the dynamic
Other on the oil duct of Buddhist nun's oil suction chamber connection to be connected to the oil duct for connecting the dynamic antivibration spring side chamber, the dynamic antivibration oil back chamber connects
Lead to the oil return opening.
One preferably or in alternative embodiment, LS pressure taps, the LS pressure taps connection are also set up on the valve block body
The load feedback mouth.
Preferably or in alternative embodiment, oil-feed pressure tap, the oil-feed pressure measurement are additionally provided with the valve block body one
Mouth connects the oil inlet.
One preferably or in alternative embodiment, the load feedback mouth, the LS pressure taps and the oil-feed pressure tap are equal
It is arranged in the same side of the valve block body.
One preferably or in alternative embodiment, the safe valve opening of main and the middle position off-load valve opening are through whole described
Valve block body, and the safe valve opening of the main and the middle position off-load valve opening pass the end of the valve block body and are located at the valve
The same side of piece body.
One preferably or in alternative embodiment, the oil inlet is two, two oil inlet connections, through whole institute
Valve block body is stated, the oil return opening is two, two oil return opening connections, through the whole valve block body.
One preferably or in alternative embodiment, valve rod is set to form check valve in one of them described oil return opening.
One preferably or in alternative embodiment, the oil inlet and the oil return opening use flange connected pipes.
To achieve the above object, present invention also offers a kind of load sensing multi-way valve first, it includes any of the above-described reality
Apply the load sensing multi-way valve first valve body in example.
One preferably or in alternative embodiment, the safe valve opening of main in the load sensing multi-way valve first valve body and its
The main safety lever that inside is set forms main safety valve, the secondary security valve in the load sensing multi-way valve first valve body
The secondary security valve rod set inside Kong Yuqi forms secondary security valve.
One preferably or in alternative embodiment, middle position off-load valve opening in the load sensing multi-way valve first valve body and its
Internal middle position unloading valve bar forms middle position unloading valve.
One preferably or in alternative embodiment, dynamic antivibration valve opening in the load sensing multi-way valve first valve body and its
The dynamic antivibration valve rod that inside is set forms dynamic antivibration valve, in the damping duct in the load sensing multi-way valve first valve body
It is provided with damping.
Based on above-mentioned technical proposal, the present invention at least has the advantages that：
Load sensing multi-way valve first valve body provided by the invention, designed using load-sensitive module, make load-sensitive more
Road valve, which need to only exchange stifled and damping position, can just be applicable constant displacement pump load sensitive system or variable pump load sensitive system, increase
The host adaptation of strong banked direction control valves, realizes multi-purpose valve.
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 front view of load sensing multi-way valve first valve body provided by the invention；
Fig. 2 is the left view schematic diagram of load sensing multi-way valve first valve body provided by the invention；
Fig. 3 is the schematic top plan view of load sensing multi-way valve first valve body provided by the invention；
Fig. 4 is the schematic cross-sectional view of load sensing multi-way valve first valve body provided by the invention；
Fig. 5 is the schematic cross-sectional view of the load-sensitive module of load sensing multi-way valve first valve body provided by the invention；
Fig. 6 is the broken section signal of the load-sensitive module of load sensing multi-way valve first valve body provided by the invention
Figure.
Label in accompanying drawing：
The safe valve opening of 1- mains；2- secondary security valve openings；3- middle position off-load valve openings；4- dynamic antivibration valve openings；5- oil inlets；
6- oil return openings；7- load feedback mouths；8-LS pressure taps；9- oil-feed pressure taps；10- is damped；11- is blocked up；
The oil ducts of 21- first；The oil ducts of 22- second；The oil ducts of 23- the 3rd；The oil ducts of 24- the 4th；The oil ducts of 25- the 5th；The oil of 26- the 6th
Road；The oil ducts of 27- the 7th；The oil ducts of 28- the 8th；The oil ducts of 29- the 9th.
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.
As Figure 1-3, it is the illustrative examples of load sensing multi-way valve first valve body provided by the invention, shows at this
In meaning property embodiment, load sensing multi-way valve first valve body includes valve block body, on valve block body at least provided with oil inlet 5,
Oil return opening 6 and load feedback mouth 7, valve block body are interior at least provided with the safe valve opening 1 of main and secondary security valve opening 2.
As shown in figure 5, at least form main oil-feed between the safe valve opening 1 of main and its internal main safety lever set
Chamber, main oil back chamber, main spring side chamber and main are without spring side chamber；Main oil suction chamber is with oil inlet 5 and main without spring side
Chamber connects, and main oil back chamber connects with oil return opening 6.
Secondary oil suction chamber is at least formed between secondary security valve opening 2 and its internal secondary security valve rod set, secondary is returned
Oil pocket, secondary spring side chamber and secondary are without spring side chamber；Secondary oil suction chamber connect without spring side chamber with secondary, secondary oil back chamber and
Oil return opening 6 connects.
Oil inlet 5 is connected by oil duct with main spring side chamber and secondary oil suction chamber；Load feedback mouth 7 passes through oil duct and master
Level spring side chamber connects with secondary oil suction chamber.
According to the difference of the pump connected with oil inlet 5, selectivity is following to be set：
Damping 10 is set on the oil duct that oil inlet 5 connects with main spring side chamber and secondary oil suction chamber, in load feedback
Stifled 11 are set on the oil ducts that mouth 7 connects with main spring side chamber and secondary oil suction chamber；So that load feedback loop is entered through oil channel
When entering main spring side chamber and secondary oil suction chamber, it is blocked at stifled 11, oil inlet 5 flows through damping 10 and the safe valve opening 1 of main,
It is blocked at secondary security valve opening 2, suitable for variable pump load sensitive system；
Or
Stifled 11 are set on the oil duct that oil inlet 5 connects with main spring side chamber and secondary oil suction chamber, in load feedback mouth 7
Damping 10 is set on the oil duct connected with main spring side chamber and secondary oil suction chamber；So that load feedback loop is entered through overdamp 10
Level security valve opening 1 and secondary security valve opening 2 are become owner of, is blocked at stifled 11, suitable for constant displacement pump load sensitive system.
Load sensing multi-way valve first valve body provided by the invention, need to only exchange stifled 11 can just fit with the position for damping 10
With constant displacement pump load sensitive system or variable pump load sensitive system, the host adaptation of banked direction control valves is enhanced, realizes that a valve is more
With.
As shown in figure 5, oil inlet 5, which is connected and set with main spring side chamber and secondary oil suction chamber, damps 10 or stifled 11
Oil duct can be arranged in main safety lever；Load feedback mouth 7 is connected and set with main spring side chamber and secondary oil suction chamber
Stifled 11 or damp 10 oil duct and can be arranged in valve block body.
As shown in figure 4, middle position off-load valve opening 3 is also provided with valve block body, middle position off-load valve opening 3 and its inside
Can at least be formed between middle position off-load valve rod middle position off-load oil suction chamber, middle position off-load oil back chamber, middle position unloading spring side chamber and
Middle position off-load is connected without spring side chamber, middle position off-load oil suction chamber with oil inlet 5 and middle position off-load without spring side chamber, and middle position off-load is returned
Oil pocket connects with oil return opening 6, and middle position unloading spring side chamber connects with load feedback mouth 7.
As shown in figure 1, being also provided with dynamic antivibration valve opening 4 on valve block body, dynamic antivibration valve opening 4 inside it with setting
Dynamic antivibration oil suction chamber, dynamic antivibration oil back chamber, dynamic antivibration spring side can be at least formed between the dynamic antivibration valve rod put
Chamber and dynamic antivibration are without spring side chamber；Dynamic antivibration oil suction chamber connects with oil inlet 5, and dynamic antivibration oil suction chamber connects with oil inlet 5
Damping duct is provided with logical oil duct, on the oil duct that connect with oil inlet 5 of damping duct by be connected to connect dynamic antivibration without
The oil duct of spring side chamber, it is other on the oil duct that damping duct connects with dynamic antivibration oil suction chamber to be connected to connection dynamic antivibration spring side
The oil duct of chamber, dynamic antivibration oil back chamber connection oil return opening 6.
As shown in figure 1, LS (Load Sensing, load-sensitive) pressure taps 8 and oil-feed can also be set on valve block body
Pressure tap 9, LS pressure taps 8 connect load feedback mouth 7, and oil-feed pressure tap 9 connects oil inlet 5.Load feedback mouth 7, LS pressure taps 8
The same side of valve block body, pressure signal collection point and maintenace point centralized arrangement, convenient installation are arranged in oil-feed pressure tap 9
The collection of the data such as oil pipe and pressure.
As shown in figure 4, the safe valve opening 1 of main and middle position off-load valve opening 3 can run through whole valve block body, by oil inlet 5
It is connected with oil return opening 6.The both ends of the safe valve opening 1 of main and middle position off-load valve opening 3 can pass valve block body, main safety
One of end of valve opening 1 and one of end of middle position off-load valve opening 3 can be located at the side of valve block body, main
Another end of safe valve opening 1 and another end of middle position off-load valve opening 3 can be located at the opposite side of valve block body.
As shown in Fig. 2 due to the safe valve opening 1 of main, middle position off-load valve opening 3 and secondary security valve opening 2, it is necessary to adjust, it is secondary
The end that level security valve opening 2 passes valve block body can also be positioned at wherein one end of the safe valve opening 1 of main and middle position off-load valve opening 3
The valve block body side at place, convenient regulation.
As shown in Figure 4, Figure 5, oil inlet 5 can set two, and two oil inlets 5 connect, and through whole valve block body, return
Hydraulic fluid port 6 can set two, and two oil return openings 6 connect, through whole valve block body.It can be set in one of oil return opening 6
Valve rod forms check valve.Pressure oil can select, from any one in two oil inlets 5 or two oil-feeds simultaneously, to return from two
Any one in hydraulic fluid port 6 or two oil returns simultaneously.
In above-mentioned illustrative examples, two oil inlets 5 can be arranged up and down, and two oil return openings 6 can also be arranged up and down,
So that pipeline installation is more convenient, selection is more.
In above-mentioned illustrative examples, oil inlet 5 and oil return opening 6 can use flange connected pipes.Connected using flange
Installation form is connect, has that installation caliber is big, high pressure, the advantages that being not easy water clock.
As shown in fig. 6, one for load-sensitive multichannel first valve body installation load sensitive blocks provided by the invention is specific
The schematic cross-sectional view of embodiment, the first oil duct 21, the second oil duct can be provided with this specific embodiment, in valve block body
22nd, the 3rd oil duct 23, the 4th oil duct 24, the 5th oil duct 25, the 6th oil duct 26, the 7th oil duct 27, the 8th oil duct 28 and the 9th oil
Road 29.
Wherein, the 9th oil duct 29 connection load feedback mouth 7 and the 8th oil duct 28, the 8th oil duct 28 connect the 7th oil duct 27,
7th oil duct 27 connects the 4th oil duct 24, and the 4th oil duct 24 connects the 6th oil duct 26 and the 3rd oil duct 23, the 6th oil duct 26 connect
5th oil duct 25, the 5th oil duct 25 also connect the safe valve opening 1 of main, and the 3rd oil duct 23 can connect second by the first oil duct 21
Oil duct 22, the second oil duct 22 connection oil return opening 6, sets secondary security valve opening 2, when secondary between the 3rd oil duct 23 and the first oil duct 21
After setting secondary security valve rod in level security valve opening 2, by promoting secondary security valve rod to realize the 3rd oil duct 23 and first
The connection or blocking of oil duct 21.
When installation damping 10 in the internal galleries of the main safety lever in the safe valve opening 1 of main, in the 7th oil duct 27
When interior installation blocks up 11 so that load feedback loop is by the 9th oil duct 29, the 8th oil duct 28 and the 7th oil duct 27, being blocked
At stifled 11, oil inlet 5 flows through internal galleries and the damping 10 of main safety lever, crosses the 5th oil duct 25, the 6th oil duct the 26, the 4th
Oil duct 24, the 3rd oil duct 23, are blocked at secondary security valve opening 2, suitable for variable pump load sensitive system.
11 are blocked up when being installed in the internal galleries of the main safety lever in the safe valve opening 1 of main, in the 7th oil duct 27
Installation damping 10 so that load feedback loop is by the 9th oil duct 29, the 8th oil duct 28, the 7th oil duct 27, the oil of damping the 10, the 4th
Road 24, the 6th oil duct 26, the 5th oil duct 25, into the internal galleries of main safety lever, it is blocked in main safety lever
In internal galleries at stifled the 11 of installation, suitable for constant displacement pump load sensitive system.
Load sensing multi-way valve first valve body provided by the invention can be applied in load sensing multi-way valve first.
In the illustrative examples of load sensing multi-way valve first provided by the invention, load sensing multi-way valve first valve
The safe valve opening 1 of main in body can form main safety valve, load-sensitive multichannel with its internal main safety lever set
Secondary security valve opening 2 in valve first valve body can form secondary security valve with its internal secondary security valve rod set.Load
Middle position off-load valve opening 3 and the middle position off-load valve rod of its inside in sensing multi-way valve first valve body can form middle position unloading valve.
Dynamic antivibration valve opening 4 in load sensing multi-way valve first valve body can form dynamic with its internal dynamic antivibration valve rod set
Orifice valve, damping can be provided with the damping duct in load sensing multi-way valve first valve body.
It should be noted that：In above-mentioned each embodiment, between mouth and mouth, between mouth and hole, and between Kong Yukong,
Can be by setting oil duct to connect, the setting of oil duct can be formed by processing technology hole.
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 first valve body provided by the invention, designed using load-sensitive module, make load-sensitive
Banked direction control valves, which need to only exchange stifled and damping position, can just be applicable constant displacement pump load sensitive system or variable pump load sensitive system,
Strengthen the host adaptation of banked direction control valves, realize multi-purpose valve.
2) load sensing multi-way valve first valve body provided by the invention, there are multiple duty valve block installation sites, there is safety
Valve, middle position unloading valve, dynamic antivibration valve, check valve etc., different valve blocks can be selected to install according to demand, strengthen banked direction control valves master
Machine adaptability.
3) load sensing multi-way valve first valve body provided by the invention, pressure signal collection point and maintenace point centralized arrangement,
It is easily installed, convenient maintenance.
4) load sensing multi-way valve first valve body provided by the invention, there is two groups of oil inlets and oil return opening, up and down arrangement.
In summary, load sensing multi-way valve first valve body provided by the invention, its valve block body include oil inlet, oil return
Mouth, guide's oil duct, high-pressure oil duct, low pressure oil duct etc., are provided simultaneously with safety valve, middle position unloading valve, dynamic antivibration valve, check valve etc.
Installation site, constant displacement pump load sensitive system and variable pump load sensitive system can be applied to simultaneously.It is all using equivalent substitution or
The banked direction control valves first valve body structure that equivalent transformation is formed, all falls within the protection domain of application claims.
In the description of the invention, it is to be understood that use " first ", " second ", " the 3rd " ... ..., " the 9th " etc.
Word limits parts, it is only for is easy to distinguish above-mentioned parts, does not such as have a Stated otherwise, above-mentioned word is simultaneously
There is no particular meaning, 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 (15)
- A kind of 1. load sensing multi-way valve first valve body, it is characterised in that：Including valve block body, it is provided with the valve block body Oil inlet (5), oil return opening (6) and load feedback mouth (7), the safe valve opening of main (1) and secondary are provided with the valve block body Safe valve opening (2)；Main oil suction chamber, main are at least formed between the safe valve opening of main (1) and its internal main safety lever set Oil back chamber, main spring side chamber and main are without spring side chamber；The main oil suction chamber and the oil inlet (5) and the main without Spring side chamber connects, and the main oil back chamber connects with the oil return opening (6)；Secondary oil suction chamber, secondary are at least formed between the secondary security valve opening (2) and its internal secondary security valve rod set Oil back chamber, secondary spring side chamber and secondary are without spring side chamber；The secondary oil suction chamber connects with the secondary without spring side chamber, institute Secondary oil back chamber is stated to connect with the oil return opening (6)；The oil inlet (5) is connected by oil duct with the main spring side chamber and the secondary oil suction chamber；The load feedback Mouth (7) is connected by oil duct with the main spring side chamber and the secondary oil suction chamber；According to the difference of the pump connected with the oil inlet (5), selectivity is following to be set：The oil inlet (5) connects variable pump, in the oil inlet (5) and the main spring side chamber and the secondary oil suction chamber Damping (10) is set on the oil duct of connection, in the load feedback mouth (7) and the main spring side chamber and the secondary oil-feed Set stifled (11) on the oil duct of chamber connection；OrThe oil inlet (5) connects constant displacement pump, in the oil inlet (5) and the main spring side chamber and the secondary oil suction chamber Set on the oil duct of connection stifled (11), in the load feedback mouth (7) and the main spring side chamber and the secondary oil suction chamber Damping (10) is set on the oil duct of connection.
- 2. load sensing multi-way valve first valve body as claimed in claim 1, it is characterised in that：The oil inlet (5) with it is described Main spring side chamber connects with the secondary oil suction chamber and sets damping (10) or the oil duct of stifled (11) is arranged on the main peace In full valve bar, the load feedback mouth (7) connects with the main spring side chamber and the secondary oil suction chamber and set stifled (11) Or the oil duct of damping (10) is arranged in the valve block body.
- 3. load sensing multi-way valve first valve body as claimed in claim 1, it is characterised in that：Also set up on the valve block body There is middle position off-load valve opening (3), at least forming middle position between the middle position off-load valve opening (3) and its internal middle position off-load valve rod unloads Lotus oil suction chamber, middle position off-load oil back chamber, middle position unloading spring side chamber and middle position off-load are without spring side chamber, the middle position off-load oil-feed Chamber connects with the oil inlet (5) and the middle position off-load without spring side chamber, the middle position off-load oil back chamber and the oil return opening (6) connect, the middle position unloading spring side chamber connects with the load feedback mouth (7).
- 4. the load sensing multi-way valve first valve body as described in claim any one of 1-3, it is characterised in that：The valve block body On be additionally provided with dynamic antivibration valve opening (4), between the dynamic antivibration valve opening (4) and its internal dynamic antivibration valve rod set extremely Dynamic antivibration oil suction chamber, dynamic antivibration oil back chamber, dynamic antivibration spring side chamber and dynamic antivibration are formed less without spring side chamber；It is described Dynamic antivibration oil suction chamber connects with the oil inlet (5), the oil duct that the dynamic antivibration oil suction chamber connects with the oil inlet (5) On be provided with damping duct, on the oil duct that connect with the oil inlet (5) of the damping duct by be connected to and connect the dynamic The oil duct without spring side chamber is damped, it is other on the oil duct that the damping duct connects with the dynamic antivibration oil suction chamber to be connected to connection The oil duct of the dynamic antivibration spring side chamber, the dynamic antivibration oil back chamber connect the oil return opening (6).
- 5. load sensing multi-way valve first valve body as claimed in claim 1, it is characterised in that：Also set up on the valve block body LS pressure taps (8), the LS pressure taps (8) connect the load feedback mouth (7).
- 6. load sensing multi-way valve first valve body as claimed in claim 5, it is characterised in that：Also set up on the valve block body There is oil-feed pressure tap (9), the oil-feed pressure tap (9) connects the oil inlet (5).
- 7. load sensing multi-way valve first valve body as claimed in claim 6, it is characterised in that：The load feedback mouth (7), institute State LS pressure taps (8) and the oil-feed pressure tap (9) is arranged in the same side of the valve block body.
- 8. load sensing multi-way valve first valve body as claimed in claim 3, it is characterised in that：The safe valve opening of main (1) Run through the whole valve block body, and the safe valve opening of the main (1) and the middle position off-load with the middle position off-load valve opening (3) The end that valve opening (3) passes the valve block body is located at the same side of the valve block body.
- 9. load sensing multi-way valve first valve body as claimed in claim 1, it is characterised in that：The oil inlet (5) is two, Two oil inlet (5) connections, through the whole valve block body, the oil return opening (6) is two, two oil return openings (6) connect, through the whole valve block body.
- 10. load sensing multi-way valve first valve body as claimed in claim 9, it is characterised in that：One of them described oil return opening (6) valve rod is set to form check valve in.
- 11. load sensing multi-way valve first valve body as claimed in claim 1, it is characterised in that：The oil inlet (5) and described Oil return opening (6) uses flange connected pipes.
- A kind of 12. load sensing multi-way valve first, it is characterised in that：It is quick including the load as described in claim any one of 1-11 Feel banked direction control valves first valve body.
- 13. load sensing multi-way valve first as claimed in claim 12, it is characterised in that：The load sensing multi-way valve first The safe valve opening of main (1) in valve body forms main safety valve, the load-sensitive with its internal main safety lever set Secondary security valve opening (2) in banked direction control valves first valve body forms secondary security valve with its internal secondary security valve rod set.
- 14. load sensing multi-way valve first as claimed in claim 13, it is characterised in that：The load sensing multi-way valve first Middle position off-load valve opening (3) in valve body forms middle position unloading valve with its internal middle position unloading valve bar.
- 15. the load sensing multi-way valve first as described in claim 13 or 14, it is characterised in that：The load sensing multi-way valve Dynamic antivibration valve opening (4) in first valve body forms dynamic antivibration valve, the load with its internal dynamic antivibration valve rod set Damping is provided with damping duct in sensing multi-way valve first valve body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510024493.7A CN105840573B (en) | 2015-01-16 | 2015-01-16 | Load sensing multi-way valve first valve body and load sensing multi-way valve first |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510024493.7A CN105840573B (en) | 2015-01-16 | 2015-01-16 | Load sensing multi-way valve first valve body and load sensing multi-way valve first |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105840573A CN105840573A (en) | 2016-08-10 |
| CN105840573B true CN105840573B (en) | 2018-04-06 |
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| US4034563A (en) * | 1976-07-28 | 1977-07-12 | International Harvester Company | Load sensitive hydraulic system |
| CN102913438B (en) * | 2011-08-05 | 2017-02-08 | 江苏国瑞液压机械有限公司 | Hydraulic pump changeover valve |
| CN202280675U (en) * | 2011-08-05 | 2012-06-20 | 江苏国瑞液压机械有限公司 | Multi-way valve oil inlet joint provided with dynamic induction and priority functions |
| CN103343759A (en) * | 2012-09-18 | 2013-10-09 | 赵江 | Dual-purpose multi-channel hydraulic proportional valve |
| CN103398038B (en) * | 2013-08-14 | 2016-04-27 | 徐州徐工液压件有限公司 | Multifunctional three-way flow control valve and construction machinery hydraulic system |
| CN104047917B (en) * | 2014-06-23 | 2016-08-24 | 柳州柳工液压件有限公司 | Flow distributor for construction machinery |
| CN204553381U (en) * | 2015-01-16 | 2015-08-12 | 徐工集团工程机械股份有限公司 | Load sensing multi-way valve first valve body and load sensing multi-way valve first |
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