CN209025901U - Multifunction hydraulic shared system - Google Patents
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Abstract
Multifunction hydraulic shared system disclosed by the utility model is connected to as follows: supply pump working hydraulic pressure media port BPumpIt is connected to main valve working hydraulic pressure media port PIt is mainAnd multifunctional decompression separate system；Multifunctional decompression separate system depressurizes step by step: the working hydraulic pressure media port P of pressure-gradient control valve is connected to after level-one decompressionIt is excellent, the working hydraulic pressure media port CF through pressure-gradient control valveIt is excellentIt is connected to the working hydraulic pressure media port P of load sensing diverter againTurn；The feedback hydraulic media port Ls of pressure-gradient control valveIt is excellentIt is connected to the feedback hydraulic media port Ls of load sensing diverterTurn；The poppet port b of main valve is connected to after another grade of decompressionIt is main.The utility model pumps the function control that can have both met main working oil path using same, the hydraulic medium Compliance control of the auxiliary systems functions such as steering, guide, the hydraulic braking of a variety of different pressures demands can be realized again, additional energy is greatly decreased, the contradiction between high output engine and high standard discharge is effectively solved, the requirement of national energy conservation and emission reduction is met.
Description
Technical field
The utility model relates to a kind of multifunctional decompression separate systems, turned to more particularly to a kind of decompression shunting realization,
Guide, walk hydraulic braking hydraulic system.
Background technique
At present realize turn to, guide and walk hydraulic braking hydraulic system, usually need it is multiple pump and it is corresponding with each pump
Fluid pressure line, hydraulic part, such as: using be loaded into engine power taking mouth main pump to the main valve of main hydraulic system provide liquid
Pressure oil, by being loaded into the steering pump of other power taking mouths of engine, pioneer pump respectively correspond provide course changing control, pilot control institute
The hydraulic oil needed.Certainly, steering pump, pioneer pump etc. can also be set on main pump.
No matter which kind of above-mentioned form will necessarily bring substantially additional energy consumption, also will increase to starting because using multiple pumps
The power taking of machine relies on, and also can be many and diverse therewith with the matched fluid pressure line of each pump, hydraulic part.
Especially since each pump provides hydraulic oil respectively, and then controls executive component movement, therefore multiple executive components act
Between harmony there is also larger problems.
Utility model content
In view of this, the purpose of this utility model is to provide one kind can reduce energy consumption and power taking dependence, and
Realize the steering of coordination and the multifunction hydraulic shared system of guide.
In order to achieve the above objectives, the solution of the utility model is:
Multifunction hydraulic shared system, including main valve and executive component, and the supply main valve working hydraulic pressure medium
Supply pump；Wherein: the supply pump is variable pump or constant displacement pump, further includes that load sensing diverter and multifunctional decompression shunt system
System；
The working hydraulic pressure media port B of the supply pumpPumpIt is respectively communicated with the working hydraulic pressure media port P of the main valveIt is main, Yi Jiduo
Function depressurizes separate system；
The working hydraulic pressure media port A of the main valveIt is mainWith working hydraulic pressure media port BIt is mainIt is respectively communicated with and corresponding described executes member
Part；
The multifunctional decompression separate system is corresponding after depressurizing step by step to constitute following mode of communicating:
The working hydraulic pressure media port P of pressure-gradient control valve is connected to after level-one decompressionIt is excellent, the working hydraulic pressure media port through the pressure-gradient control valve
CFIt is excellent, then it is connected to the working hydraulic pressure media port P of the load sensing diverterTurn；And the feedback hydraulic media port of the pressure-gradient control valve
LsIt is excellentIt is connected to the feedback hydraulic media port Ls of the load sensing diverterTurn；
The poppet port b of the main valve is connected to after another grade of decompressionIt is main。
The multifunctional decompression separate system, including multiple decompression members by setting pressure, multiple decompressions
Element is respectively the pressure reducing valve of non-sliding valve structure, and multiple pressure reducing valves depressurize step by step, and the corresponding work for being connected to the pressure-gradient control valve
Make hydraulic medium mouth PIt is excellentAnd the poppet port b of the main valveIt is main。
Multiple pressure reducing valves are respectively pressure reducing valve PR1, pressure reducing valve PR2, and are gone here and there step by step by following Hydraulic Elements composition
Connection decompression or step by step decompression in parallel:
Pressure reducing valve PR2 described in the pressure reducing valve PR1 serial or parallel connection；
Before the pressure reducing valve PR1, connect check valve d1；
After the pressure reducing valve PR2, it is sequentially connected in series filter LX1 and check valve d3；
Wherein, the working hydraulic pressure media port P of the pressure-gradient control valve is connected to before the pressure reducing valve PR2 decompressionIt is excellent, described to subtract
After pressure valve PR2 decompression, it is connected to the poppet port b of the main valve again through on-off control valveIt is main；
The filter LX1 parallel connection forms the check valve d2 of bypass circulation；
The check valve d3 parallel connection forms the overflow valve YL1 of skimmer circuit；
Turn-on accumulator ACC between the check valve d3 and the on-off control valve；
And so on, repetition be arranged the corresponding decompression of series connection step by step for constituting two-stage or two-stage or more of above-mentioned Hydraulic Elements or
Decompression in parallel step by step.
In the decompression of series connection step by step or the decompression in parallel step by step, Hydraulic Elements as described below save one or more:
The check valve d1, it another check valve d3, filter LX1, another check valve d2, the accumulator ACC, described overflows
Flow valve YL1, the on-off control valve.
The multifunctional decompression separate system successively integrates oil clot and pilot control block through guide after pressure reduction with classification, then
It is connected to the poppet port b of the main valveIt is main；And/or
The multifunctional decompression separate system is also connected to Full-hydraulic braking apparatus valve group after pressure reduction with classification.
The pilot control block is pilot control handle and/or pilot control button.
The pressure relief ranges of the decompression of series connection step by step or the decompression in parallel step by step are 8-12 megapascal.
In foregoing multifunction hydraulic shared system:
The executive component is selected from one of the following or multiple: boom cylinder, bucket cylinder, bucket arm cylinder, broken oil
Cylinder, clamping cylinder, gripping apparatus rotary hydraulic motor, first leg oil cylinder, the second support oil cylinder, soil-shifting oil cylinder, rotary fluid motor；
It is equipped with each pressure-compensated valve to match with the executive component in the main valve, and is mended according to the pressure is set
The ascending variation of the compensating differential pressure of valve is repaid, the corresponding executive component is controlled and acts successive priority.
In foregoing multifunction hydraulic shared system: what the multifunction hydraulic shared system use integrated
The combination of one or both of overall structure, the separate structure of packing.
After adopting the above scheme, the utility model has the following beneficial effects:
Hydraulic medium is provided using a pump, extra freight steering pump, pioneer pump is not necessarily to, course changing control, elder generation can be realized
Control, hydraulic braking control etc. are led, not only cost reduces very much, moreover it is possible to additional energy consumption be greatly decreased, reduce to engine
Power taking relies on, and reduces fluid pressure line corresponding with each pump, hydraulic part.
In particular, being pumped using one, is finished when the matched hydraulic part of multifunction hydraulic shared system has chosen to install, can make to execute
The coordination that element is accelerated in proportion, slowed down.
Further, the ascending variation of the compensating differential pressure of pressure-compensated valve in main valve is set, corresponding execution is obtained
The successive priority of element movement.
In short, can not only meet the function control of main working oil path when this case provides hydraulic medium using same pump, but also
The hydraulic medium Compliance control that the auxiliary system function of a variety of different pressures demands may be implemented, such as course changing control, pilot control,
Walking hydraulic braking control etc..This case has following significant social effect: not only cost reduces very much, moreover it is possible to be greatly decreased by
The additional energy of respective main pump fuel feeding scheme is individually assembled in auxiliary system, it is higher to meet the following non-rice habitats internal combustion engine of country
Discharge standard provides preferred hydraulic system and shares energy saving solution, so that the following state IV for reaching high standard, the non-road state V
When the engine exhaust of road, also ensure that meet complete machine equipment Requirement in the case where, can be by suitably reducing engine power
Efficiently approach better meets the emission request of high standard to this economy, to reduce to processing unit for tail pair
The rigors of performance efficiently solve technical contradiction and cost problem between high output engine and high standard discharge, full
The requirement of sufficient national energy conservation and emission reduction.The dependence to the power takings mouth quantity such as engine is reduced simultaneously, reduces Hydraulic Elements, fluid pressure line
Quantity, so that executive component is obtained the approximation speed coordination on year-on-year basis of reasonable priority.
Detailed description of the invention
Fig. 1 is the hydraulic schematic diagram that load sensitive pump is used in the utility model.
Fig. 2 is the hydraulic schematic diagram in the utility model using load sensitive pump and pressure-gradient control valve.
Fig. 3 is to use variable pump or constant displacement pump as supply pump and the hydraulic schematic diagram of pressure-gradient control valve in the utility model.
Fig. 4 is the hydraulic schematic diagram of concatenated multifunctional decompression separate system in the utility model.
Fig. 5 is the hydraulic schematic diagram of multifunctional decompression separate system in parallel in the utility model.
In figure:
Hydraulic oil container 1
Load sensitive pump 2
Supply pump 2 '
Multifunctional decompression separate system 3
Load sensing diverter 4
Steering cylinder 5
Guide's oil gathering block 6
Pilot control block 7
Main valve 8
Main valve 8 '
Pressure-gradient control valve 9
Walking brake fluid system 10
Executive component 20: boom cylinder 21, bucket arm cylinder 23, clamps/is crushed oil cylinder 24, fixture revolution at bucket cylinder 22
Hydraulic motor 25, support oil cylinder 26, soil-shifting oil cylinder 27, rotary fluid motor 28.
Specific embodiment
The utility model relates to following multiple embodiments: as shown in Figure 1 to Figure 2, using load sensitive pump, using negative
Carry the load-sensitive multifunction hydraulic shared system of sensitive pump and pressure-gradient control valve 9；As shown in figure 3, using supply pump and pressure-gradient control valve 9
Multifunction hydraulic shared system；As shown in Fig. 4 to Fig. 5, multifunctional decompression separate system 3 concatenated, in parallel.In order to further
Explain the technical solution of the utility model, the utility model is elaborated below by specific embodiment.
Wherein, corresponding each letter is expressed as follows on each Hydraulic Elements shown in Fig. 1 to Fig. 5: P indicates that working hydraulic pressure is situated between
The oil inlet of matter, A indicate the oil outlet of working hydraulic pressure medium, and B indicates the oil return opening of working hydraulic pressure medium, certainly, with operating condition
Variation, B indicate that the oil outlet of working hydraulic pressure medium, A indicate the oil return opening of working hydraulic pressure medium.Ls indicates feedback hydraulic medium
Hydraulic fluid port, T indicate the oil return opening of oil return.
In addition, in each embodiment of this case, as P, working hydraulic pressure media port PIt is main, feedback hydraulic media port LsIt is main, poppet port
aIt is main、AIt is main、BIt is main、bIt is mainWhen equal valve ports are respectively provided with multiple, then add different numbers and distinguished with showing.Such as: P1、P2、P3、PMain 1、PMain 2、
LsMain 1、LsIt is main2、aMain 1、aMain 2、AMain 1、AMain 2、AMain 3、BMain 1、BMain 2、BMain 3、bMain 1、bMain 2、bMain 3Deng.The valve port of other following each valves occurs
When such situation, also adds different numbers and distinguished with showing.
As shown in Figure 1, load-sensitive multifunction hydraulic shared system mainly include hydraulic oil container 1, it is load sensitive pump 2, more
Function depressurizes separate system 3, load sensing diverter 4, main valve 8, executive component 20 etc..Using these commercially available hydraulic parts,
By this case to constitute the main hydraulic system being loaded on engineering truck.Therefore below to the specific knot of commercially available each hydraulic part itself
Structure and hydraulic principle are no longer described in detail.
Hydraulic oil container 1 accepts the oil return of above-mentioned Hydraulic Elements mainly for hydraulic system oil storage.
Load-sensitive plunger pump can be used in example 1 and example 2, positive flow control pump, bear for load sensitive pump 2
Any in flow control pump, three's mode of communicating, hydraulic principle are similar, therefore are described by taking load sensitive pump as an example below.
Load sensitive pump 2 is loaded on the power taking mouth of engine or on the power taking mouth of proprietary power takeoff, load sensitive pump
Pump case is equipped with the import S of oil suctionPump, fuel-displaced working hydraulic pressure media port BPumpAnd feedback hydraulic media port XPump.Load sensitive pump
Working hydraulic pressure medium and/or feedback hydraulic medium these hydraulic mediums are mainly supplied to executive component 20 by following manner.
Multifunctional decompression separate system 3 can be level-one decompression, two-stage decompression, three-level decompression, multi-step pressure reduction, series connection subtract
Pressure, decompression in parallel etc., below mainly by taking two-stage decompression as an example.Multifunctional decompression separate system mainly includes the level-one depressurized step by step
Pressure reducing valve and another one-level pressure relief valve.The pressure relief ranges of one-level pressure relief valve and another one-level pressure relief valve can be arranged according to load requirement, compared with
Goodly, the pressure relief ranges of one-level pressure relief valve are 8-12 megapascal, and/or the pressure relief ranges of another one-level pressure relief valve are 8-12 megapascal,
And/or the pressure relief ranges of decompressions at different levels are 8-12 megapascal.Preferably, being more than what two-stage or more depressurized when being equipped with, then depressurize step by step
Pressure relief ranges can successively successively decrease several megapascal, such as the pressure relief ranges depressurized step by step be followed successively by 8-12 megapascal, 6-10 megapascal,
4-8 megapascal etc., and so on.
The feedback hydraulic media port Ls of load sensing diverter 4TurnBy anti-close to the access of the position of load sensing diverter
Hydraulic medium is presented, pipeline is simplified more in this way, is also convenient for laying.
L cylinder, the R cylinder of steering cylinder 5 are mainly controlled by load sensing diverter 4, realize that left and right course changing control and steering are held
Row.
In addition, guide's oil gathering block 6, pilot control block 7, are added as preferred embodiments.Elder generation can be used in pilot control block
Control crank and/or pilot control button are led, commercially available existing structure can be used, details are not described herein.Wherein, guide's oil gathering block
6 settable P as shown in Figure 1 to Figure 3Lead behaviour、PLead behaviour 1、PLead behaviour 2、PLead behaviour 3、PLead behaviour 4、TLead behaviour、TLead behaviour 1、TLead behaviour 2、TLead behaviour 3、TLead behaviour 4It is connect etc. multiple
Mouth, valve port etc..Settable 1 as shown in Figure 1 to Figure 3 of pilot control block 7,2,3,4, PLead behaviour、TLead behaviourEtc. multiple interfaces, valve port
Deng.
Main valve 8 is can be used in example 1 and example 2 such as flowering structure: the load to match with load sensitive pump is quick
What the positive flow multichannel valve assembly and inverted flux control pump that sense multichannel valve assembly and positive flow control pump match matched bears
Flow multichannel valve assembly.Three's mode of communicating, hydraulic principle are similar, therefore below using the main valve of load sensing multi-way valve assembly
For described.
Main valve 8 mainly includes the multiple groups pressure-compensated valve and pilot valve by existing structure, hydraulic control mode matching connection
Deng.The valve casing of main valve is equipped with working hydraulic pressure media port PIt is main, feedback hydraulic media port LsIt is main, every group of pressure is corresponded on the valve casing of main valve
Force compensating valve and pilot valve further respectively have poppet port aIt is main.Every group of pressure-compensated valve and pilot valve and following each executive components
20 match.Hydraulic medium is controlled by main valve in this way, so that corresponding each executive component 20 is adapted to all kinds of operating conditions, and can be quasi-
Really, complexity, combinative movement are completed in phase, and safety in production is realized while improving efficiency.
One or more of following combinations can be used in executive component 20, as depicted in figs. 1 and 2, executive component 20 from
Left-to-right is successively are as follows: boom cylinder 21, bucket arm cylinder 23, clamps/be crushed oil cylinder 24, the hydraulic horse of fixture revolution at bucket cylinder 22
Up to 25, one or more support oil cylinders 26, soil-shifting oil cylinder 27, rotary fluid motor 28 etc..It is also sequentially equipped on the valve casing of main valve 8
Valve port corresponding with above-mentioned each executive component: aMain 1、bMain 1、BMain 1、AMain 1, aMain 2、bMain 2、BMain 2、AMain 2, aMain 3、bMain 3、BMain 3、AMain 3, aMain 4、
bMain 4、BMain 4、AMain 4, aMain 5、bMain 5、BMain 5、AMain 5, aMain 6、bMain 6、BMain 6、AMain 6, aMain 7、bMain 7、BMain 7、AMain 7, aMain 8、bMain 8、BMain 8、AMain 8.Wherein, B,
The valve port that A is indicated is connected respectively to the respective ends of corresponding oil cylinder, rotary fluid motor.Certainly, executive component can also be further
Structure including above-mentioned oil cylinder, the corresponding driving of motor: swing arm, scraper bowl, dipper, broken/clamp linkage component, fixture, one or
Multiple supporting legs, soil-shifting link assembly etc..It is above-mentioned that only executive component is illustrated, it is not limited to this.
The digital number that above-mentioned each executive component corresponds to valve port only distinguishes different each executive components, certainly according to actually answering
With can also as shown in figure 3, valve port be sequentially communicated from right to left dipper 2, scraper bowl, swing arm 1, revolution, dipper 1, it is broken, swing arm 2, push away
Soil, and corresponding oil cylinder or hydraulic motor etc..
Embodiment one
As shown in Figure 1, the load-sensitive multifunction hydraulic shared system of the present embodiment is mainly for having used load-sensitive
The shared system of pump.Here shared and in embodiment two, which refers to, provides hydraulic medium by same pump, such as same negative
Sensitive pump, same supply pump or same main pump are carried, to each hydraulic pressure system such as main hydraulic system, steering system, pilot system
System provides the hydraulic mediums such as hydraulic oil.
The main connected relation of load-sensitive multifunction hydraulic shared system is as follows:
The working hydraulic pressure media port B of load sensitive pumpPumpIt is divided into two-way, is connected to the working hydraulic pressure media port P of main valve all the wayMain 1,
Another way is connected to multifunctional decompression separate system in valve port P1.Enclosed multi-way valve assembly structure can be used in main valve in the present embodiment.
The working hydraulic pressure media port A of main valveMain 1To AMain 8With working hydraulic pressure media port BMain 1To BMain 8Connection pair as previously described respectively
Each executive component answered.
Multifunctional decompression separate system mainly uses one or more decompression members, and each decompression member is non-sliding valve structure
Pressure reducing valve, multiple pressure reducing valves depressurize step by step by setting pressure, such as can be divided into two-way after level-one, second level depressurize step by step.This
In " step by step depressurize " refer to that the pressure after the pressure ratio level-one decompression after second depressurized is also low.Connect after level-one decompression in valve port C
The working hydraulic pressure media port P of logical load sensing diverterTurn, turned to since the pressure that pilot valve uses is usually less than load sensing
Device, therefore the poppet port a of main valve is connected to after second depressurized by valve port AMain 1To poppet port aMain 8, and pass through corresponding bMain 1Extremely
bMain 8Form corresponding pilot circuit.
Certainly, multifunctional decompression separate system can also increase what decompression, such as level-one, second level, three according to the actual situation
Decompression, multistage can be divided into multichannel after depressurizing step by step to grade step by step.As shown in Figure 1, level-one decompression after be connected to foregoing valve port C it
Outside, the valve port P of the Full-hydraulic braking apparatus valve group of walking brake fluid system 10 can be also connected to by valve port BSystemEtc. auxiliary systems；Or
Optionally, one or more spare hydraulic fluid ports are reserved respectively in level-one, second depressurized, three-level decompression.In addition, leading to back in valve port T
Oil system.
In addition, the specific structure about multifunctional decompression separate system is detailed in aftermentioned example IV, five.
The feedback hydraulic media port X of load sensitive pumpPumpOil circuit out is also divided into two-way, is connected to the feedback liquid of main valve all the way
Press media port LsMain 1, the feedback hydraulic media port Ls of another way connection load sensing diverterTurn。
Preferably, the feedback hydraulic media port X of load sensitive pump, positive flow control pump or inverted flux control pumpPumpDirectly connect
The feedback hydraulic media port Ls of logical load sensing diverterTurn。
Preferably, multifunctional decompression separate system, which after pressure reduction with classification, is sequentially communicated guide, integrates grasping with guide for oil clot
Vertical block, then it is connected to the poppet port a of main valveIt is main.Fig. 1, which is illustrated only, integrates oil clot to boom cylinder 21, bucket cylinder 22 through guide
Poppet port aMain 1To poppet port aMain 2Guide's oil circuit, other aMain 3、aMain 4、aMain 5、aMain 6、aMain 7、aMain 8Oil circuit also with this phase
Together.The hydraulic fluid port P of oil clot is integrated about guideLead collection、PLead collection 1、PLead collection 2、PLead collection 3、PLead collection 4、TLead collection、TLead collection 1、TLead collection 2、TLead collection 3、TLead collection 4, Yi Jixian
Lead the hydraulic fluid port P of manipulation blockLead behaviour、TLead behaviourMode of communicating it is identical as existing structure, details are not described herein.
Preferably, the corresponding connection of load sensitive pump, main valve, multifunctional decompression separate system, load sensing diverter
Between oil circuit on, also settable corresponding check valve, make it is hydraulic more stable, avoid between oil circuit generate interference.
Preferably, overflow valve can be also connected on the oil circuit of main valve, and the pressure of the overflow valve is set as 2.5Mpa, in this way,
To ensure that the working hydraulic pressure medium of main valve is stablized in the pressure limit of setting.
Preferably, load-sensitive multifunction hydraulic shared system is divided using the overall structure integrated, or all
Above-mentioned various situations can be used in the separate structure of dress, or the integrated morphology that part is integrated, the one package structual of aliquots in a word
Combination.
For example, the valve block structure integrated can be used in multifunctional decompression separate system.It can also be according to requiring, function
Each Hydraulic Elements depressurized in separate system use the structure of independent packing, and it is shared to be assemblied in load-sensitive multifunction hydraulic
In system.
If multifunctional decompression separate system is using the valve block structure integrated, valve port P1, the valve port that this case refers to
A, valve port B, valve port C, valve port T refer to the corresponding each valve port opened up on the integrated valve block.
If multifunctional decompression separate system uses Hydraulic Elements independent, it is total to be divided in load-sensitive multifunction hydraulic
It enjoys in system, then this case refers to valve port P1, valve port A, valve port B, valve port C, valve port T can refer to corresponding interface P1, interface A, connect
Mouth B, interface C, interface T.
If corresponding Hydraulic Elements also use Hydraulic Elements independent in load-sensitive multifunction hydraulic shared system
It does not integrate, then corresponding valve port also can refer to interface.
In short, according to a load sensitive pump, then when the matched hydraulic part of load-sensitive multifunction hydraulic shared system
It has matched and has finished, then the coordination that executive component can be made to be accelerated in proportion, be slowed down.For example, setting scraper bowl completion is a set of
Movement, related executive component required time are set in following ratio: scraper bowl: dipper: swing arm 1:1.2:1.5.If scraper bowl is 2
Second, then obtain the approximate coordination slowed down on year-on-year basis, i.e. scraper bowl: dipper: swing arm 2:2.4:3.If scraper bowl is 4 seconds, obtain
The coordination that approximation slows down on year-on-year basis, i.e. scraper bowl: dipper: swing arm 4:4.8:6.
This case above-described embodiment, can also be according to the compensating differential pressure of setting pressure-compensated valve due to using a load sensitive pump
Ascending variation is mended due to being equipped with each pressure-compensated valve to match with executive component in main valve, and according to setting pressure
The ascending variation of the compensating differential pressure of valve is repaid, corresponding executive component is controlled and acts successive priority.
Embodiment two
As shown in Fig. 2, the load-sensitive multifunction hydraulic shared system and the main distinction of embodiment one of the present embodiment are
Pressure-gradient control valve 9, other same, similar structure, mode of communicating, hydraulic principle etc. are also used while using load sensitive pump 2
Details are not described herein.
The working hydraulic pressure media port B of load sensitive pumpPumpIt is also divided into two-way, is connected to the working hydraulic pressure media port of main valve all the way
PMain 1, another way is in valve port P1 connection multifunctional decompression separate system.
The working hydraulic pressure media port A of main valveMain 1To AMain 8With working hydraulic pressure media port BMain 1To BMain 8Connection pair as previously described respectively
Each executive component answered.
The feedback hydraulic media port X of load sensitive pumpPumpOnly it is connected to the feedback hydraulic media port Ls of main valveMain 1, that is to say, that
The feedback hydraulic media port X of load sensitive pumpPumpIt is not connected to the feedback hydraulic media port Ls of load sensing diverterTurn。
The feedback hydraulic media port Ls of load sensing diverter 4TurnIt is connected in the following manner: multifunctional decompression separate system
It can be divided into two-way after depressurizing step by step.In the working hydraulic pressure media port P of valve port C connection pressure-gradient control valve 9 after level-one decompressionIt is excellent, through preferential
The working hydraulic pressure media port CF of valve 9It is excellent, then it is connected to the working hydraulic pressure media port P of load sensing diverterTurn.And pressure-gradient control valve 9 is anti-
Present hydraulic medium mouth LsIt is excellentIt is connected to the feedback hydraulic media port Ls of load sensing diverterTurn。
Meanwhile after another grade of decompression of multifunctional decompression separate system, master is connected in valve port A as described in preceding embodiment one
The poppet port a of valveMain 1To poppet port aMain 8。
Preferably, on oil circuit between the connection of pressure-gradient control valve 9, load sensing diverter 4, also settable corresponding check valve
DExcellent 1, make it is hydraulic more stable, avoid between oil circuit generate interference.
The present embodiment mainly passes through pressure-gradient control valve 9 and shunts formation feedback hydraulic Jie all the way, and supplies to load sensing and turn to
The feedback hydraulic media port Ls of device 4Turn。
Embodiment three
As shown in figure 3, the main distinction of the multifunction hydraulic shared system of the present embodiment and embodiment one is using supply
Pump 2 ' and pressure-gradient control valve 9, details are not described herein for other same, similar structure, mode of communicating, hydraulic principle etc..
Multifunction hydraulic shared system mainly includes supply pump 2 ', main valve 8 ', executive component 20, load sensing diverter 4
With multifunctional decompression separate system 3.
Supply pump 2 ' uses variable pump or constant displacement pump.
The working hydraulic pressure media port B of supply pump 2 'PumpIt is divided into two-way, is connected to the working hydraulic pressure media port P of main valve 8 ' all the wayMain 1；
It certainly optionally, can be according to the setting such as 8 ' oil inlet function of main valve needs PMain 1、PMain 2, this can be respectively communicated with the work of main valve all the way
Hydraulic medium mouth PMain 1、PMain 2.Another way is connected to multifunctional decompression separate system in valve port P1.
Center-Open multi-way valve assembly structure, the working hydraulic pressure media port A of main valve can be used in main valve 8 'Main 1To AMain 7And work
Hydraulic medium mouth BMain 1To BMain 7Respectively as previously mentioned, corresponding 7 executive components of connection.
Multifunctional decompression separate system 3 is corresponding after depressurizing step by step to constitute following mode of communicating:
In the working hydraulic pressure media port P of valve port C connection pressure-gradient control valve after level-one decompressionIt is excellent, the working hydraulic pressure medium through pressure-gradient control valve
Mouth CFIt is excellent, then it is connected to the working hydraulic pressure media port P of load sensing diverterTurn.And the feedback hydraulic media port Ls of pressure-gradient control valveIt is excellentEven
The feedback hydraulic media port Ls of logical load sensing diverterTurn。
The poppet port b of main valve is connected to after another grade of decompression by valve port AMain 1To poppet port bMain 7, and pass through corresponding elder generation
Pilot valve mouth aMain 1To aMain 7Form corresponding pilot circuit.
In the present embodiment, since supply pump does not have feedback hydraulic media port XPump, the main valve to match is also without feedback hydraulic
Media port LsIt is main.It shunts to form feedback hydraulic medium all the way by pressure-gradient control valve, and is connected to the feedback hydraulic of load sensing diverter
Media port LsTurn。
Example IV
As shown in figure 4, the multifunctional decompression separate system 3 of the present embodiment is mainly used in the various embodiments described above, and right
Concatenated multifunctional decompression separate system is described further.
Multifunctional decompression separate system 3 mainly includes multiple decompression members, and multiple decompression members can be realized by setting pressure
Decompression, and multiple decompression members are respectively the pressure reducing valve of non-sliding valve structure, multiple pressure reducing valves are connected decompression step by step.
Multiple pressure reducing valves corresponding connection steering system and pilot system after depressurizing step by step, can also further be connected to hydraulic braking
System etc..For example, as shown in figure 4, being connected in steering system after level-one decompression in valve port C after multiple pressure reducing valves depressurize step by step
Foregoing load sensing diverter, in valve port A be connected to the foregoing elder generation in pilot system after another grade of decompression
Lead oil gathering block, pilot control block, pilot valve in main valve etc..It is with pressure reducing valve PR1, pressure reducing valve PR2 the two pressure reducing valves below
Example is described in detail.
Preferably, as shown in figure 4, following Hydraulic Elements are followed in series to form series connection decompression step by step: check valve d1, pressure reducing valve
PR1, pressure reducing valve PR2, filter LX1 and check valve d3.Wherein, the one end valve port P1 is connected to main hydraulic system, main pump, load-sensitive
2 or supply pump 2 ' etc. are pumped, the valve port P1 other end is connected to check valve d1.After pressure reducing valve PR1 forms level-one decompression, i.e., in pressure reducing valve
Before PR2 decompression, steering system is connected in valve port C；After depressurizing again, i.e., depressurize to form another grade of decompression through pressure reducing valve PR2
Afterwards, pilot system is connected in valve port A through on-off control valve SV1.
Preferably, filter LX1 can check valve d2 in parallel, form bypass circulation, it is ensured that block under situation in filter LX1
Bypass circulation can still be formed.Check valve d3 can also overflow valve YL1 in parallel, it is ensured that when being more than that check valve d3 sets pressure, can pass through
Skimmer circuit conducting.Between check valve d3 and on-off control valve SV1 can turn-on accumulator ACC, with the hydraulic of storing and setting pressure
Medium；In this way, can still efficiently use the hydraulic of accumulator ACC storage in the case of on-off control valve SV1 cuts off hydraulic medium
Media implementation pilot control.For example, hydraulic Jie of accumulator ACC storage can also be efficiently used in the case of engineering truck parking
Matter realizes pilot control, puts down swing arm, dipper, withdraws scraper bowl etc..
Preferably, and so on, it repeats that check valve d1, pressure reducing valve PR1, pressure reducing valve PR2, filter LX1, check valve is arranged
The above-mentioned Hydraulic Elements such as d3, check valve d2, overflow valve YL1, on-off control valve SV1, so that corresponding constitute two-stage or two-stage or more
Series connection step by step decompression.
Certainly, in series connection decompression step by step, following Hydraulic Elements can also save one or more: check valve d1, check valve
D3, filter LX1, check valve d2, accumulator ACC, on-off control valve SV1.
Preferably, the non-preferred cartridge pressure reduction valve of side valve type pressure reducing valve of this case, it is advantageous that:
1, cartridge pressure reduction valve basic module is made of spool, valve pocket, spring and sealing ring, and valve core structure is simple, is moved
Make sensitive, good airproof performance.
2, it the characteristics of the versatility of its assembling process, the versatility of valve opening specification, interchangeability, may be implemented completely perfect
Design configurations.
3, its is small in size, at low cost, and the element of installation and the pipeline of connection greatly reduce, the whole series designed using plug-in
Control system can greatly reduce manufacturing man-hours for user.
4, each element of its control system can carry out independent test before being assembled into integrated valve block.
Preferably, on-off control valve SV1 is solenoid valve, pilot solenoid valve, pilot operated valve device or mechanical valve.
Preferably, multiple pressure reducing valves can also be connected to walking brake fluid system 10 in valve port B after level-one decompression, and/or
In the one or more spare hydraulic fluid ports of valve port D connection after level-one decompression, lead to oil return system in valve port T.
Preferably, the fission of the overall structure, packing that integrate can be used in concatenated multifunctional decompression separate system
The combination of one or both of structure.For example, optionally, above-mentioned Hydraulic Elements can be fully integrated together, be made one
Complete valve block structure.
In the present embodiment, since setting is serially connected with the first conductive magnetism of another one-level pressure relief valve in multifunctional decompression separate system
Valve is serially connected with the overflow valve of another one-level pressure relief valve, by the button of manual operation pilot solenoid valve, realize guide oil cutting and
Conducting, finally ensures the trouble free service under each operating condition.
And due to the feedback hydraulic media port Ls of load sensing diverterTurn, main valve feedback hydraulic media port LsIt is main, it is main
The poppet port a of valveIt is mainIt is equipped with filter, overflow valve, accumulator before, can ensure that the cleaning of guide oil, it is ensured that pilot pressure is flat
Surely, so that it is guaranteed that the movement of each executive component is more sensitive and reliable.
Embodiment five
As shown in figure 5, the present embodiment is multifunctional decompression separate system 3 in parallel, exist with the main distinction of example IV
In pressure reducing valve PR1 and pressure reducing valve PR2 use parallel connection, to constitute decompression in parallel step by step.
As shown in figure 5, decompression in parallel is specific as follows step by step: the one end valve port P1 is connected to main hydraulic system, main pump, load-sensitive
2 or supply pump 2 ' etc. are pumped, the valve port P1 other end is connected to check valve d1.The pressure reducing valve PR1 and pressure reducing valve of check valve d1 series and parallel
PR2.Pressure reducing valve PR1 and pressure reducing valve PR2 in parallel is sequentially connected in series filter LX1 and check valve d3 again.One is formed through pressure reducing valve PR1
After grade decompression, steering system is connected in valve port C；After pressure reducing valve PR2 forms another grade of decompression, through on-off control valve SV1 in valve
Mouth A is connected to pilot system.
Preferably, parallel connection decompression can also be used such as each Hydraulic Elements in example IV, the corresponding composition of repetition setting step by step
Decompression in parallel step by step more than two-stage or two-stage.But also one or more following Hydraulic Elements can be saved: check valve d1, unidirectional
Valve d3, filter LX1, check valve d2, accumulator ACC, pressure reducing valve PR2, on-off control valve SV1.
The scheme in example IV can be used other than using pressure reducing valve in parallel in the present embodiment in a word, therefore, identical phase
Like place, details are not described herein.
The product form and style of above-described embodiment and attached drawing and non-limiting the utility model, any technical field
The appropriate changes or modifications that those of ordinary skill does it all should be regarded as the patent category for not departing from the utility model.
Claims (10)
1. multifunction hydraulic shared system, including main valve and executive component, and the confession of the supply main valve working hydraulic pressure medium
To pump；It is characterized by: the supply pump is variable pump or constant displacement pump, it further include load sensing diverter and multifunctional decompression point
Streaming system；
The working hydraulic pressure media port B of the supply pumpPumpIt is respectively communicated with the working hydraulic pressure media port P of the main valveIt is mainAnd it is multi-functional
Depressurize separate system；
The working hydraulic pressure media port A of the main valveIt is mainWith working hydraulic pressure media port BIt is mainIt is respectively communicated with the corresponding executive component；
The multifunctional decompression separate system is corresponding after depressurizing step by step to constitute following mode of communicating:
The working hydraulic pressure media port P of pressure-gradient control valve is connected to after level-one decompressionIt is excellent, the working hydraulic pressure media port CF through the pressure-gradient control valveIt is excellent, then
It is connected to the working hydraulic pressure media port P of the load sensing diverterTurn；And the feedback hydraulic media port Ls of the pressure-gradient control valveIt is excellentEven
Lead to the feedback hydraulic media port Ls of the load sensing diverterTurn；
The poppet port b of the main valve is connected to after another grade of decompressionIt is main。
2. multifunction hydraulic shared system as described in claim 1, it is characterised in that: the multifunctional decompression separate system,
Including multiple decompression members by setting pressure, multiple decompression members are respectively the pressure reducing valve of non-sliding valve structure, more
A pressure reducing valve depressurizes step by step, and the corresponding working hydraulic pressure media port P for being connected to the pressure-gradient control valveIt is excellentAnd the institute of the main valve
State poppet port bIt is main。
3. multifunction hydraulic shared system as claimed in claim 2, it is characterised in that: multiple pressure reducing valves are respectively to depressurize
Valve PR1, pressure reducing valve PR2, and series connection decompression step by step or decompression in parallel step by step are constituted by following Hydraulic Elements:
Pressure reducing valve PR2 described in the pressure reducing valve PR1 serial or parallel connection；
Before the pressure reducing valve PR1, connect check valve d1；
After the pressure reducing valve PR2, it is sequentially connected in series filter LX1 and check valve d3；
Wherein, the working hydraulic pressure media port P of the pressure-gradient control valve is connected to before the pressure reducing valve PR2 decompressionIt is excellent, the pressure reducing valve
After PR2 decompression, it is connected to the poppet port b of the main valve again through on-off control valveIt is main；
The filter LX1 parallel connection forms the check valve d2 of bypass circulation；
The check valve d3 parallel connection forms the overflow valve YL1 of skimmer circuit；
Turn-on accumulator ACC between the check valve d3 and the on-off control valve；
And so on, the corresponding decompression of series connection step by step for constituting two-stage or two-stage or more of above-mentioned Hydraulic Elements or step by step is arranged in repetition
Parallel connection decompression.
4. multifunction hydraulic shared system as claimed in claim 3, it is characterised in that: it is described step by step series connection decompression or it is described by
In grade decompression in parallel, Hydraulic Elements as described below save one or more: the check valve d1, another check valve d3, mistake
Filter LX1, another the check valve d2, the accumulator ACC, the overflow valve YL1, the on-off control valve.
5. multifunction hydraulic shared system as described in claim 1, it is characterised in that:
The multifunctional decompression separate system successively integrates oil clot and pilot control block through guide after pressure reduction with classification, then is connected to
The poppet port b of the main valveIt is main；And/or
The multifunctional decompression separate system is also connected to Full-hydraulic braking apparatus valve group after pressure reduction with classification.
6. multifunction hydraulic shared system as claimed in claim 5, it is characterised in that: the pilot control block is pilot control
Handle and/or pilot control button.
7. multifunction hydraulic shared system as claimed in claim 3, it is characterised in that: it is described step by step series connection decompression or it is described by
The pressure relief ranges of grade decompression in parallel are 8-12 megapascal.
8. the multifunction hydraulic shared system as described in any one of claim 1 to 7 claim, it is characterised in that:
The executive component is selected from one of the following or multiple: boom cylinder, bucket cylinder, bucket arm cylinder, broken oil cylinder, folder
Locking oil cylinder, gripping apparatus rotary hydraulic motor, first leg oil cylinder, the second support oil cylinder, soil-shifting oil cylinder, rotary fluid motor；
Each pressure-compensated valve to match with the executive component is equipped in the main valve, and according to the setting pressure-compensated valve
The ascending variation of compensating differential pressure, control the corresponding executive component and act successive priority.
9. the multifunction hydraulic shared system as described in any one of claim 1 to 7 claim, it is characterised in that: institute
State the group that multifunction hydraulic shared system uses one or both of the overall structure integrated, separate structure of packing
It closes.
10. multifunction hydraulic shared system as claimed in claim 8, it is characterised in that: the multifunction hydraulic shared system
The combination of one or both of separate structure using the overall structure, packing that integrate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821585857.4U CN209025901U (en) | 2018-09-27 | 2018-09-27 | Multifunction hydraulic shared system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821585857.4U CN209025901U (en) | 2018-09-27 | 2018-09-27 | Multifunction hydraulic shared system |
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| Publication Number | Publication Date |
|---|---|
| CN209025901U true CN209025901U (en) | 2019-06-25 |
Family
ID=66905029
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821585857.4U Expired - Fee Related CN209025901U (en) | 2018-09-27 | 2018-09-27 | Multifunction hydraulic shared system |
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| Country | Link |
|---|---|
| CN (1) | CN209025901U (en) |
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2018
- 2018-09-27 CN CN201821585857.4U patent/CN209025901U/en not_active Expired - Fee Related
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