CN109488653A - Double compensation spool valve post-compensation multi-way valve - Google Patents
Double compensation spool valve post-compensation multi-way valve Download PDFInfo
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- CN109488653A CN109488653A CN201811579111.7A CN201811579111A CN109488653A CN 109488653 A CN109488653 A CN 109488653A CN 201811579111 A CN201811579111 A CN 201811579111A CN 109488653 A CN109488653 A CN 109488653A
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- 239000012530 fluid Substances 0.000 claims abstract description 41
- 230000000694 effects Effects 0.000 claims abstract description 8
- 238000013016 damping Methods 0.000 claims description 12
- 238000009434 installation Methods 0.000 claims description 3
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 239000003921 oil Substances 0.000 description 145
- 238000010586 diagram Methods 0.000 description 20
- 230000006870 function Effects 0.000 description 19
- 230000006872 improvement Effects 0.000 description 9
- 239000007788 liquid Substances 0.000 description 9
- 230000033001 locomotion Effects 0.000 description 9
- 239000002131 composite material Substances 0.000 description 6
- 238000006073 displacement reaction Methods 0.000 description 6
- 230000010076 replication Effects 0.000 description 6
- 230000005611 electricity Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 238000011217 control strategy Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000011176 pooling Methods 0.000 description 1
- 238000012857 repacking Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000001953 sensory effect Effects 0.000 description 1
- 230000009131 signaling function Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/021—Valves for interconnecting the fluid chambers of an actuator
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/08—Servomotor systems incorporating electrically operated control means
- F15B21/087—Control strategy, e.g. with block diagram
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- Analytical Chemistry (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
A kind of double compensation spool valve post-compensation multi-way valve.Solve that existing hydraulic multichannel valve compensation is unreliable, so that system pressure loss is big, energy consumption is high, and control mode is single, the small problem of range of fit.It includes oil inlet, oil return opening, feed back hydraulic fluid port, oil inlet and oil return connection and at least a piece of work connection, the work connection includes work valve body and work valve rod, first actuator port on the work valve body, second actuator port, first cavity and mounting hole, compensation device is equipped in the mounting hole, load pickup restriction is equipped between the oil inlet and feedback hydraulic fluid port, the feedback hydraulic fluid port is connected by constant flow rate valve with oil return opening, it is identical and contrary that the pressure oil of the feedback oil port with pressure oil at the first cavity acts on the area in compensation device.Compensation device is set on present invention work connection, and compensation device is balanced to the isobaric duplication of pressure progress after work valve rod using Pressure behaviour, waited more preferable than shunting effect.
Description
Technical field
The present invention relates to a kind of hydraulic control systems, and in particular to a kind of double compensation spool valve post-compensation multi-way valve.
Background technique
Hydraulic multitandem valve is divided into out center multi-way valve and closes center multi-way valve.Center multi-way valve is opened not change in commutation valve rod
The oil liquid of Xiang Shi, oil pump flow through T mouthfuls of oil return by multi-way valve commutation valve rod；Center multi-way valve is closed not commutate in commutation valve rod
When, commutation valve rod is that no oil liquid passes through, and if it is the constant outputs oil sources such as gear pump, oil liquid passes through threeway recuperation valve at this time
Core (being commonly called as flow divider) flows to T mouthfuls with certain constant pressure, if it is variable pump etc., then always by the stroking mechanism of oil pump
Maintain intimate zero-displacement condition.
The enclosed center most common system of multi-way valve is to form load sensitive system with constant displacement pump or load sensitive pump, and bear
Carry sensory system on a large scale, mass application.
In the case that multi-joint enclosed center multi-way valve is related to double acting work, more movement common actions, it is required to low-load
Work connection compensate, usually acquisition maximum load pressure light load pressure is compensated, to reach different loads
The purpose that work connection can work at the same time.
Since hydraulic actuator has the hydraulic cylinder of linear motion, also there is the hydraulic motor of rotary motion.Oil cylinder is general
Stretch/shrink two movements all comprising oil cylinder, motor include clockwise/anticlockwise rotation two movements of motor, and the center multi-way valve of closing changes
To valve rod can by the displacement control oil cylinder of left and right both direction flexible or motor clockwise/anticlockwise rotation two move
Make.
Conventional multiple valve generally uses single compensating spool structure to respectively drive oil that is, by dividing two-way again after compensating spool
Cylinder stretch/shrink or motor clockwise/anticlockwise rotation, such structure can not individually mend two movements of oil cylinder or motor
It repays, but multi-way valve components are relatively fewer, and structure is also relatively simple.
Summary of the invention
Unreliable for existing hydraulic multichannel valve compensation in solution background technique, so that system pressure loss is big, energy consumption is high,
Control mode is single, the small problem of range of fit, and the present invention provides a kind of double compensation spool valve post-compensation multi-way valve.
The technical scheme is that a kind of double compensation spool valve post-compensation multi-way valve, including it is oil inlet, oil return opening, anti-
Presenting hydraulic fluid port, oil inlet and oil return connection and at least a piece of work connection, the work connection includes work valve body and work valve rod, the work
First actuator port, the second actuator port, the first cavity and mounting hole on valve body, the mounting hole is interior to be equipped with compensation device,
The work valve rod has so that the pressure oil of oil inlet passes through first that compensation device is connected with the first actuator port
It sets, the second position ended at middle position, so that the pressure oil of oil inlet is connected by compensation device with the second actuator port
The third place, load pickup restriction is equipped between the oil inlet and feedback hydraulic fluid port, it is fixed that the feedback hydraulic fluid port passes through
Flow valve is connected with oil return opening, and pressure oil acts on compensation device at the pressure oil and the first cavity of the feedback oil port
On area it is identical and contrary.
As an improvement of the present invention, the compensation device includes the first recuperation valve and the second recuperation valve, described
Work valve rod is set in operating valve body and is separated out the second cavity and third cavity, first recuperation valve be set to the first cavity and
Between second cavity and first segment head piece is formed, second recuperation valve is set between the first cavity and third cavity and is formed
Second restriction.
As a further improvement of the present invention, first recuperation valve includes compensating spool and compensates screw plug, described
Work connection is equipped with work screw plug, and compensation control chamber, the compensation control are equipped between the work screw plug and compensation screw plug
Chamber processed is connected with feedback hydraulic fluid port.
As a further improvement of the present invention, the compensation screw plug is equipped with compensation damping hole, the compensation control
Chamber is connected by compensation damping hole with feedback hydraulic fluid port.
As a further improvement of the present invention, work connection is equipped with safety overflow valve, the safety overflow valve
Oblique to be set on work valve body, first recuperation valve and the second recuperation valve are set in parallel in operating valve body.
As a further improvement of the present invention, described work valve rod be equipped with drain path, the draining by
Work valve rod makes the second cavity, third cavity be connected respectively with oil return opening when being in the second position.
As a further improvement of the present invention, work connection is at least two, the feedback hydraulic fluid port phase of different operating connection
Connection.
As a further improvement of the present invention, the oil inlet and oil return is associated with two panels, and is equipped with and closes between two panels oil inlet and oil return connection
Valve is flowed, the converging valve includes interflow valve rod, and the interflow valve rod has so that the pressure oil of different oil inlet and oil return connection is mutual
The first position of connection and the second position of disconnection, the interflow valve rod are equipped with interflow groove.
As a further improvement of the present invention, oil inlet and oil return connection is equipped with main overflow valve, feedback overflow valve and shunting
Valve, the main overflow valve are set between oil inlet and oil return opening, and the feedback overflow valve is equipped with feedback hydraulic fluid port and oil return opening
Between, the flow divider is set between oil inlet and oil return opening.
As a further improvement of the present invention, the flow divider includes diverter valve stem and the gap bridge that offsets with diverter valve stem
Screw plug, the oil inlet and the pressure oil collective effect and the openings of sizes of control valve rod in diverter valve stem for feeding back hydraulic fluid port.
The invention has the advantages that both can be used for Constant Pump System, it can be used for variable pump systems；And work connection
Upper setting compensation device, compensation device are balanced using Pressure behaviour and carry out isobaric duplication to the pressure after work valve rod, and scores are waited
It is more preferable to flow effect.The advantages that present invention also has structure simple, easy to assembly, reliable in action, long service life.
Detailed description of the invention
Attached drawing 1 is the structural schematic diagram of the embodiment of the present invention.
Attached drawing 2 is the structural schematic diagram of oil inlet and oil return connection 1 in attached drawing 1.
Attached drawing 3 is the half section structure diagram of attached drawing 2.
Attached drawing 4 joins 2 structural schematic diagram to work in attached drawing 1.
Attached drawing 5 is the half section structure diagram of attached drawing 4.
Attached drawing 6 is half section structure diagram when work valve rod 22 is in first position.
Attached drawing 7 is half section structure diagram when work valve rod 22 is in the third place.
Attached drawing 8 is structural schematic diagram when work valve rod 22 is in the second position.
Structural schematic diagram when attached drawing 9 is the first recuperation valve 6 realization signal replication in attached drawing 6.
Structural schematic diagram when attached drawing 10 is the first recuperation valve 6 realization compensation function in attached drawing 6.
Attached drawing 11 is the structural schematic diagram in attached drawing 10 at compensating spool 61.
Attached drawing 12 is the structural schematic diagram in attached drawing 1 at converging valve 8.
Attached drawing 13 is the half section structure diagram of converging valve 8 in attached drawing 12.
Attached drawing 14 is the structural schematic diagram collaborated when valve rod 81 is in the second position in attached drawing 13.
Attached drawing 15 is the structural schematic diagram for collaborating valve rod 81 in attached drawing 13.
Attached drawing 16 is the enlarged structure schematic diagram in attached drawing 15 at I.
Attached drawing 17 is the schematic cross-sectional view in attached drawing 15 at I.
Attached drawing 18 is the hydraulic schematic diagram of the embodiment of the present invention.
In figure, 1, oil inlet and oil return connection；11, main overflow valve；12, overflow valve is fed back；13, flow divider；131, valve body is shunted；132,
Diverter valve stem；133, gap bridge screw plug；2, work connection；21, work valve body；22, work valve rod；221, drain path；23, first holds
Chamber；24, the second cavity；25, third cavity；26, work screw plug；27, safety overflow valve；3, compensation device；4, load pickup section
Head piece；5, constant flow rate valve；6, the first recuperation valve；61, compensating spool；62, screw plug is compensated；63, damping hole is compensated；7, the second compensation
Valve；8, converging valve；81, collaborate valve rod；811, collaborate groove；A, the first actuator port；B, the second actuator port；P, oil inlet；
T, oil return opening；Ls, feedback hydraulic fluid port；PLsa, compensation control chamber.
Specific embodiment
Embodiments of the present invention is further illustrated with reference to the accompanying drawing:
As shown in Fig. 1 combination Fig. 2-18, a kind of double compensation spool valve post-compensation multi-way valve, including oil inlet P, oil return inlet T,
Feeding back hydraulic fluid port Ls, oil inlet and oil return connection 1 and at least a piece of work connection 2, the work connection 2 includes work valve body 21 and work valve rod
22, the first actuator port A, the second actuator port B, the first cavity 23 and mounting hole on the work valve body 21, the peace
It fills and is equipped with compensation device 3 in hole, the described work valve rod 22 has so that the pressure oil of oil inlet P passes through compensation device 3 and the
The first position that one actuator port A is connected, the second position ended at middle position, so that the pressure oil of oil inlet P is through overfill
The third place that device 3 is connected with the second actuator port B is repaid, is equipped with load between the oil inlet P and feedback hydraulic fluid port Ls
Restriction 4 is picked up, the feedback hydraulic fluid port Ls is connected by constant flow rate valve 5 with oil return inlet T, at the feedback hydraulic fluid port Ls
It is identical and contrary that pressure oil with pressure oil at the first cavity 23 acts on the area in compensation device 3.The present invention both can be with
For Constant Pump System, it can be used for variable pump systems；And compensation device is set on work connection, compensation device is dynamic using pressure
State balance carries out isobaric duplication to the pressure after work valve rod, waits more preferable than shunting effect.The present invention also has structure simple, dress
With convenient, the advantages that reliable in action, long service life.Both composite move can be realized by compensation in the present invention, can also led to
The on-off for crossing interflow valve rod realizes composite move；Both it can be commutated using automatically controlled mode, hydraulic control or mechanical system can also be used
Commutation.
The compensation device 3 includes the first recuperation valve 6 and the second recuperation valve 7, and the work valve rod 22 is set to work
In valve body 21 and it is separated out the second cavity 24 and third cavity 25, first recuperation valve 6, which is set to the first cavity 23 and second, to be held
Between chamber 24 and first segment head piece is formed, second recuperation valve 7 is set between the first cavity 23 and third cavity 25 and shape
At the second restriction.Specifically, it feeds back pressure oil at pressure oil and the first cavity 23 at hydraulic fluid port Ls and acts on compensating spool
On area it is identical and contrary, more specifically, be feed back hydraulic fluid port Ls place the compensated damping hole of pressure oil after to compensation
Control chamber, compensating the pressure oil at control chamber, with pressure oil at the first cavity 23 to act on the area on compensating spool identical and square
Pass through the equal area of left and right two and the high pressure oil PS (PS in hydraulic schematic diagram, at oil inlet to opposite compensating spool
Pressure is identical), effective duplication has been carried out to PI mouthfuls of (at the first cavity) pressure using force balance principle.Each multi-way valve uses
Two recuperation valves carry out independent compensation to two actuator ports of every multi-way valve respectively, and structure is simple, easy to control, work
In only need to actuator port carry out repairing, the pressure loss is few, and energy consumption is small, and multi-way valve of the present invention may act as in enclosed
Heart multi-way valve uses, and can also be used as the use of open type center multi-way valve, is a kind of multi-functional multi-way valve.Specifically, first
Recuperation valve 6 is identical with 7 structure of the second recuperation valve, and is symmetrical arranged.
First recuperation valve 6 includes compensating spool 61 and compensation screw plug 62, and the work connection 2 is equipped with work spiral shell
Stifled 26, compensation control chamber PLsa, the compensation control chamber PLsa are equipped between the work screw plug 26 and compensation screw plug 62
It is connected with feedback hydraulic fluid port LS.Specifically, the pressure oil at oil inlet P by work valve rod to the first cavity when form one
Pressure PI, the first cavity is by forming pressure PII to the second cavity or third cavity at first segment head piece or third restriction.Tool
Body says that the compensation screw plug 62 is equipped with compensation damping hole 63, and the compensation control chamber PLsa passes through compensation damping hole
63 are connected with feedback hydraulic fluid port Ls.First recuperation valve can realize pressure copy function by compensation damping hole, reliably replicate the
Pressure at one cavity can reliable synchronization movement when so that multi-joint operating valve working together.
The work connection 2 is equipped with safety overflow valve 27, and the safety overflow valve 27 is oblique to be set to work valve body 21
On, first recuperation valve 6 is parallel with the second recuperation valve to be set in work valve body 21.The setting of safety overflow valve is so that work
The reliable pressure release of hydraulic fluid port energy, guarantees the safety of work connection and equipment.First recuperation valve disposed in parallel and the second recuperation valve installation side
Just, balance quality is good, easy to process.There are two safety overflow valves and is in tilted layout, and facilitates AB hydraulic fluid port pipeline to arrange, while not
Influence the dismounting of two sides electricity proportional pressure-reducing valve.
Described work valve rod 22 is equipped with drain path 221, and the draining is by being in second in work valve rod 22
The second cavity 24, third cavity 25 is made to be connected respectively with oil return inlet T when position.When the valve rod that works does not commutate, by letting out
Oily channel leads to PII mouthfuls of pressure oils and T oral groove；When the valve rod or so that works commutates, drain path is closed.It can make in this way
Work valve rod reliable draining at middle position, so that the signal replication of recuperation valve and compensation can precisely, to guarantee system essence
Really control.
The work connection 2 is at least two, and the feedback hydraulic fluid port of different operating connection 2 is connected.Specifically, work connection can
Think one, two, three, tetrad, 5-linked etc., hydraulic schematic diagram of the invention and structural schematic diagram are said using tetrad
It is bright.
The oil inlet and oil return connection 1 has two panels, and converging valve 8 is equipped between two panels oil inlet and oil return connection 1, and the converging valve 8 wraps
Include interflow valve rod 81, the described interflow valve rod have so that the first position of the mutual connection of pressure oil of different oil inlet and oil return connection 1 and
The second position of disconnection, the interflow valve rod are equipped with interflow groove 811.Converging valve enables right when using double pump work
Work connection is collaborated, so that system acting is steadily reliable.Interflow valve rod can make the communication of Ls1 and Ls2 in the connection of interflow, and logical
It crosses a gradual change interflow groove to be linked up, so that pressure at both sides can be with gentle transition, the processing is simple for throttling channel, and gradual effect is good
It is good.
The oil inlet and oil return connection 1 is equipped with main overflow valve 11, feedback overflow valve 12 and flow divider 13, the main overflow valve
11 are set between oil inlet P and oil return inlet T, and the feedback overflow valve 12 is equipped between feedback hydraulic fluid port and oil return inlet T, described
Flow divider 13 is set between oil inlet P and oil return inlet T.The setting of main overflow valve enables security of system higher, feeds back overflow
The setting of valve is so that feedback oil circuit is safer, the setting of flow divider, so that system reliably shunts.
The flow divider 13 includes diverter valve stem 132 and the gap bridge screw plug 133 to offset with diverter valve stem 132, described
Oil inlet P and the pressure oil collective effect and the openings of sizes of control valve rod on 13 bar of flow divider for feeding back hydraulic fluid port.Diverter valve stem is set
Divide among T mouthfuls of channels of two sides oil return, and with gap bridge screw plug with T mouthfuls, compact-sized, inserting is convenient.
In conjunction with attached drawing 1-18, the present invention is further detailed:
The invention reside in constructing a kind of new multi-way valve system, overall structure referring to attached drawing 1, principle referring to attached drawing 18,
Its complete function, it is compact-sized.This multi-way valve includes 4 work connection, and 1 interflow connection, two panels oil inlet and oil return connection, oil inlet and oil return, which joins, to be placed in
Both ends, interflow connection are placed in centre, and 4 work connection, which are placed in, collaborates connection two sides.
The present invention is suitable for double pump system: the pressure oil at oil inlet P is from pump, wherein for convenience, using P1
With P2 statement respectively from the pressure oil of the oil outlet of different two pumps.Hydraulic fluid port Ls is fed back, when double oil inlet and oil return connection are arranged, tool
There are two feedback oil circuits, facilitates for statement and distinguished using Ls1 and Ls2.
When using constant displacement pump, Ls1 and Ls2 are blocked, and the adjusting of flow are carried out by the flow divider that oil inlet and oil return joins, such as Fig. 3 institute
Show.When the work valve rod of work connection does not commutate, oil liquid returns T mouthfuls via flow divider, and energy consumption is small；When the work valve rod of work connection changes
Xiang Shi, according to flow demand to the first actuator port A, the second actuator port B fuel feeding, extra oil liquid returns T mouthfuls via flow divider.
When being pumped using load-reacting, Ls1 and Ls2 are separately connected the feedback port of load-reacting, and flow divider is cancelled
Or it is used as impact resistance valve.
When using automatically controlled variable pump, Ls1 and Ls2 connect pressure sensor, at the same MP1, MP2 mouthfuls (MP1, MP2 mouthfuls is are surveyed pressure
Mouthful, it is respectively used to the pressure of measurement P1 and P2) identical pressure sensor is also connect, it can be to electric control pump and automatically controlled by controller
Valve realizes various control strategy.
Although system is suitable for double pump system, it is singly not limited to double pump system, can also be accomplished by certain combination:
A, be suitable for single-pump system: at least a piece of work connection is matched and one or more pieces oil inlets connection composition single-pump system.
B, it is suitable for multiple pump: as needed with suitable work connection and oil inlet and oil return connection, forms multiple pump.
Interflow is associated between work connection, and the work connection of interflow connection two sides can be adjusted as needed；Interflow connection can root
Need to carry out the operation of open and close or ratio according to operating condition.When connection is opened when interflow, realize that double pump gives work alliance oil；When interflow joins
When closing, two work oil pumps give interflow connection two sides work alliance oil respectively.
In the present invention, oil inlet and oil return connection in flow divider be placed among the drainback passage of two sides, valve rod both ends respectively with Ls1/Ls2 with
And P1/P2 phase is linked up, and in order to which Ls1/Ls2, P1/P2 and T mouthfuls of oil liquid are effectively completely cut off, special gap bridge screw plug, effectively
The width for controlling oil inlet and oil return connection, reduces weight, so that overall structure is more compact.Work allies the communists 4 and (but is not limited to 4
Connection), be placed in interflow connection two sides, controls corresponding movement respectively.Work connection can be realized by the left and right commutation of work valve rod
AB mouthfuls of oil liquid output, and then drive executing agency's movement.Electric ratio can be used, in hydraulic, mechanical three kinds of modes in reversing mode
Any one or a few combination realize.The present invention is illustrated with most complicated electric proportional control.
Oil inlet and oil return connection function in the present invention is as follows:
Oil inlet and oil return connection is responsible for and the connection of oil pump, and arranges flow divider (three-way pressure compensating device), main overflow valve, anti-
Present the elements such as overflow valve, constant flow rate valve and return check valve.
1) when, in quantitative pump work situation: when the oil pump of connection is constant displacement pump, flow divider does not commutate in work connection
When, the flow that constant displacement pump pumps out flow to T mouthfuls by flow divider with lower pressure；When the commutation of work connection and whole streams cannot be passed through
When amount, extra flow is flow to T mouthfuls by flow divider with certain pressure by flow divider；When work connection commutates and by all stream
When amount, flow divider is closed.
2) when, in load-reacting pump work situation: when the oil pump of connection is that load-reacting pumps, with work
Join the increase of valve port opening, oil pump exports flow required for valve port.Flow divider can use the impact resistance valve of smaller flow at this time
It is replaced, the impact of system bring is effectively reduced.
3) when, in automatically controlled operation of oil pump situation: when the oil pump of connection is automatically controlled oil pump, needing electric control pump and electric ratio work
The matching output of flow is realized in the mutual cooperation for making to join.Due to the flexibility of electric-control system, automatically controlled oil pump and electric control multi-way valve
Various control strategy may be implemented in combination, greatly expands systematic difference type and flexibility.
The function of work connection in the present invention is as follows:
1), valve rod commutation function: as shown in Fig. 4,5,6,7,8,9, electric proportional pressure-reducing valve in electric proportional control end cap assembly
It is electric after output and the positively related pressure of electric signal, the valve rod that pushes the work forward commutation, realize work join A, B mouthful oil liquid export.
As shown in fig. 6, obtaining for left side electricity proportional pressure-reducing valve is electric, work valve rod is moved to right, and A mouthfuls fuel-displaced；As shown in fig. 7, right side
Obtaining for electric proportional pressure-reducing valve is electric, and work valve rod moves to left, and B mouthfuls fuel-displaced.
2), position draining and middle position block function in work valve rod: as shown in figure 8, passing through a left side when the valve rod that works does not commutate
Right work valve rod drain path leads to pressure oil PII and the T oral groove in the second cavity and third cavity；When work valve rod or so changes
Xiang Shi, drain path are closed, as shown in Figure 6,7.By the draining for the valve rod that works when middle position, common oil duct draining is compensated for
Dedicated oil duct bring valve body is needed to lengthen, the shortcomings that weight penalty；Drain path can be carried out again when work valve rod commutation
It blocks, does not influence the realization of multi-way valve function.
3), the isobaric signal replication function of compensating spool
As shown in Fig. 6,7,9, double compensation spool position figure when commutating for work valve rod, load pickup restriction 4 will at this time
Ps mouthfuls (Ps mouthfuls are connected with oil inlet P, and pressure is identical) are connected with feedback hydraulic fluid port, and feed back the constant flow that hydraulic fluid port connects very little
Valve is only just able to achieve the connection of Ps mouthfuls and feedback hydraulic fluid port Ls in the case where there is flow, and otherwise compensating spool will can not move
Make.
Feedback hydraulic fluid port oil liquid flow to left side cavity through overcompensation damping hole 63 and forms PLsa, static pressure and feedback hydraulic fluid port
Pressure PLs (describing feedback hydraulic fluid port with Ls, PLs is the pressure for feeding back oil port) is identical.Due to A1 the and A2 area of compensating spool
It is equal, therefore PI is equal to PLsa, PLsa again from PLs and equal, therefore PLs and PI pressure be it is equal, that is, feed back the pressure of hydraulic fluid port
Power is identical with the pressure in the first cavity, and this completes the equipressures to PI to replicate, i.e. signal replication function is achieved.Compensation
Spool has carried out PI mouthfuls of pressure by the equal area of left and right two and high pressure oil Ps, using force balance principle effectively multiple
System.
4), the realization of the compensation function of compensating spool:
When multi-disc works connection work, on high-tension side compensating spool is responsible for picking up maximum pressure signal PLs, and by anti-
Feedback oil duct is transmitted to the left or right side cavity of operating on low voltage connection, and as shown in Figure 10, PLs holds through overcompensation damping hole 63 to left side
Chamber, also according to pressure balance (referring to the isobaric signal replication function of compensating spool), the PI mouth pressure and height of operating on low voltage connection
Pressure work connection PI mouth pressure be it is equal, be all additionally, due to oil inlet P it is identical, which achieves high-pressure work connection with
Consistent, the i.e. realization of compensation function of operating on low voltage connection P-PI pressure difference.
If high-pressure work connection and operating on low voltage require the flow of Q, add up to the flow demand of 2Q via operating valve bar
Opening area propose that and oil pump can only provide the flow of 1Q since discharge capacity or revolving speed limit, then since high-pressure work joins
It is consistent with the pressure difference △ P=P-P1 of operating on low voltage connection, by formulaIt is found that flow Q and work valve rod
The area of passage that aperture determines is consistent, and in formula: Q represents flow；Cd represents a coefficient, generally takes 0.7；A represents work
Make the opening area of valve rod, i.e., the opening area that oil inlet P and the first cavity are formed after work valve rod reversal valve；△ P is represented
Pressure difference, the present invention in be P-PI；ρ represents the density of hydraulic oil.I.e. the flow of 1Q is divided into 2 parts and distributes to high-pressure work connection
Join with operating on low voltage.This signal replication and pressure compensated function are all achieved on compensating spool, and compensate damping
The adjustable picking up signal in hole and the speed of compensation, i.e. response speed.Compensating spool picking up signal function is for individually dynamic
When work or composite move for high pressure connection, for acting low pressure connection, compensating spool is with regard to use as compensation, to low more
It presses the pressure of the PI mouth of connection to compensate, is consistent the PI mouth pressure of itself and high pressure connection, and then realize good composite moving
Make.
The function of interflow connection in the present invention is as follows:
1), Dual-pump flow-converging function: as shown in figure 13, when solenoid valve must not electricity when, P1 and P2 mouthful and Ls1 and Ls2 mouthfuls lead to
It crosses interflow groove 811 to be linked up, realizes Dual-pump flow-converging function.
2), double pump cutting function: as shown in figure 14, when solenoid valve obtains it is electric when, control oil via solenoid valve makes converging valve
Bar commutation, so that P1 and P2 mouthfuls and LS1 and LS2 cutting, realize two sides work receipts or other documents in duplicate oil pump feed function.
3), collaborate pooling feature: interflow valve rod during the shutdown process, either Ls and P mouthful oil circuits will carry out it is gradual, it is prominent
The oil circuit of change, which rewinds, carrys out certain impact, if Figure 15,16,17 are shown, the gradual throttling channel of oil circuit is fed back, by two parameters of L and θ
Roll-off characteristic is adjusted, so that pressure at both sides can be with gentle transition, the processing is simple for throttling channel, gradual to work well.
A kind of multi-way valve of the invention patent, both can be used for Constant Pump System, can be used for variable pump systems；
Both composite move can be realized by compensation, and can also realizes composite move by collaborating the on-off of valve rod；It both can be using electricity
The commutation of prosecutor formula can also be commutated using hydraulic control or mechanical system；And every AB mouthfuls has individual compensating spool, compensating spool
Isobaric duplication is carried out to the pressure after the commutation main throttling channel of valve rod using Pressure behaviour balance, is waited more preferable than shunting effect.
In the description of the present invention, it should be noted that term " center ", " longitudinal direction ", " transverse direction ", "upper", "lower",
The orientation or positional relationship of the instructions such as "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside" is
It is based on the orientation or positional relationship shown in the drawings, is merely for convenience of description of the present invention and simplification of the description, rather than instruction or dark
Show that signified device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as pair
Limitation of the invention.In addition, term " first ", " second " are used for description purposes only, it is not understood to indicate or imply opposite
Importance.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also can be indirectly connected through an intermediary
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood at this with concrete condition
Concrete meaning in invention.In addition, in the description of the present invention, unless otherwise indicated, the meaning of " plurality " is two or two
More than.
Every technical staff's notice: of the invention although the present invention is described according to above-mentioned specific embodiment
Invention thought be not limited in the invention, any repacking with inventive concept will all be included in this patent protection of the patent right
In range.
Claims (10)
1. a kind of double compensation spool valve post-compensation multi-way valve, including oil inlet (P), oil return opening (T), feedback hydraulic fluid port (Ls), into returning
Oil connection (1) and at least a piece of work connection (2), it is characterised in that: the work connection (2) includes work valve body (21) and operating valve
Bar (22), the first actuator port (A), the second actuator port (B), the first cavity (23) and installation on the work valve body (21)
Hole, the mounting hole is interior to be equipped with compensation device (3), and the work valve rod (22) has the pressure oil so that oil inlet (P)
By the first position that compensation device (3) is connected with the first actuator port (A), the second position ended at middle position, so that
The pressure oil of oil inlet (P) passes through the third place that compensation device (3) are connected with the second actuator port (B), the oil inlet
Load pickup restriction (4) are equipped between mouth (P) and feedback hydraulic fluid port (Ls), the feedback hydraulic fluid port (Ls) passes through constant flow rate valve
(5) it is connected with oil return opening (T), the pressure oil at the feedback hydraulic fluid port (Ls) is acted on pressure oil at the first cavity (23)
Area in compensation device (3) is identical and contrary.
2. double compensation spool valve post-compensation multi-way valve according to claim 1, it is characterised in that the compensation device (3)
Including the first recuperation valve (6) and the second recuperation valve (7), the work valve rod (22) is set in work valve body (21) and is separated out the
Two cavities (24) and third cavity (25), first recuperation valve (6) be set to the first cavity (23) and the second cavity (24) it
Between and form first segment head piece, second recuperation valve (7) is set between the first cavity (23) and third cavity (25) simultaneously shape
At the second restriction.
3. double compensation spool valve post-compensation multi-way valve according to claim 2, it is characterised in that first recuperation valve
It (6) include compensating spool (61) and compensation screw plug (62), the work connection (2) is equipped with work screw plug (26), the work
Make to be equipped with compensation control chamber (PLsa) between screw plug (26) and compensation screw plug (62), the compensation control chamber (PLsa) and feedback
Hydraulic fluid port (LS) is connected.
4. double compensation spool valve post-compensation multi-way valve according to claim 3, it is characterised in that the compensation screw plug
(62) it is equipped with compensation damping hole (63), the compensation control chamber (PLsa) passes through compensation damping hole (63) and feedback hydraulic fluid port
(Ls) it is connected.
5. double compensation spool valve post-compensation multi-way valve according to claim 2, it is characterised in that on the work connection (2)
Equipped with safety overflow valve (27), the safety overflow valve (27) is oblique to be set on work valve body (21), first compensation
Valve (6) is parallel with the second recuperation valve to be set in work valve body (21).
6. double compensation spool valve post-compensation multi-way valve according to claim 2, it is characterised in that described work valve rod
(22) drain path (221) are equipped with, the draining is by making the second appearance when work valve rod (22) is in the second position
Chamber (24), third cavity (25) are connected with oil return opening (T) respectively.
7. double compensation spool valve post-compensation multi-way valve according to claim 1, it is characterised in that the work connection (2) is extremely
It is less two, the feedback hydraulic fluid port of different operating connection (2) is connected.
8. double compensation spool valve post-compensation multi-way valve according to claim 1, it is characterised in that the oil inlet and oil return joins (1)
There is two panels, and be equipped with converging valve (8) between two panels oil inlet and oil return connection (1), the converging valve (8) includes interflow valve rod (81), institute
The interflow valve rod stated has so that the first position of the mutual connection of pressure oil of different oil inlet and oil return connection (1) and the second of disconnection
It sets, the interflow valve rod is equipped with interflow groove (811).
9. double compensation spool valve post-compensation multi-way valve according to claim 1, it is characterised in that the oil inlet and oil return joins (1)
It is equipped with main overflow valve (11), feedback overflow valve (12) and flow divider (13), the main overflow valve (11) is set to oil inlet (P)
Between oil return opening (T), the feedback overflow valve (12) is equipped between feedback hydraulic fluid port and oil return opening (T), the flow divider
(13) it is set between oil inlet (P) and oil return opening (T).
10. double compensation spool valve post-compensation multi-way valve according to claim 1, it is characterised in that the flow divider (13)
Including diverter valve stem (132) and the gap bridge screw plug (133) to offset with diverter valve stem (132), the oil inlet (P) and feedback oil
The openings of sizes of valve rod is controlled in the pressure oil collective effect and flow divider (13) bar of mouth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811579111.7A CN109488653A (en) | 2018-12-24 | 2018-12-24 | Double compensation spool valve post-compensation multi-way valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811579111.7A CN109488653A (en) | 2018-12-24 | 2018-12-24 | Double compensation spool valve post-compensation multi-way valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109488653A true CN109488653A (en) | 2019-03-19 |
Family
ID=65711497
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811579111.7A Withdrawn CN109488653A (en) | 2018-12-24 | 2018-12-24 | Double compensation spool valve post-compensation multi-way valve |
Country Status (1)
| Country | Link |
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| CN (1) | CN109488653A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110630579A (en) * | 2019-09-30 | 2019-12-31 | 圣邦集团有限公司 | Control valve for emergency rescue vehicle |
| CN111664136A (en) * | 2020-05-25 | 2020-09-15 | 圣邦集团有限公司 | Load compensation balance valve |
| CN112112848A (en) * | 2020-09-24 | 2020-12-22 | 圣邦集团有限公司 | Double-loop hydraulic system |
| CN112112849A (en) * | 2020-09-24 | 2020-12-22 | 圣邦集团有限公司 | Double-loop hydraulic system with rear confluence of main throttling port |
| CN112648409A (en) * | 2021-01-07 | 2021-04-13 | 圣邦集团有限公司 | Integrated multi-way valve |
| CN113175455A (en) * | 2021-04-26 | 2021-07-27 | 江苏汇智高端工程机械创新中心有限公司 | Multi-way valve confluence control structure of hydraulic excavator |
| CN115978043A (en) * | 2022-12-30 | 2023-04-18 | 徐州阿马凯液压技术有限公司 | Load-sensitive multi-way valve with double-pump confluence control and priority function |
-
2018
- 2018-12-24 CN CN201811579111.7A patent/CN109488653A/en not_active Withdrawn
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110630579A (en) * | 2019-09-30 | 2019-12-31 | 圣邦集团有限公司 | Control valve for emergency rescue vehicle |
| CN110630579B (en) * | 2019-09-30 | 2024-04-23 | 圣邦集团有限公司 | Control valve for rescue vehicle |
| CN111664136A (en) * | 2020-05-25 | 2020-09-15 | 圣邦集团有限公司 | Load compensation balance valve |
| CN111664136B (en) * | 2020-05-25 | 2024-04-19 | 圣邦集团有限公司 | Load compensation balance valve |
| CN112112848A (en) * | 2020-09-24 | 2020-12-22 | 圣邦集团有限公司 | Double-loop hydraulic system |
| CN112112849A (en) * | 2020-09-24 | 2020-12-22 | 圣邦集团有限公司 | Double-loop hydraulic system with rear confluence of main throttling port |
| CN112648409A (en) * | 2021-01-07 | 2021-04-13 | 圣邦集团有限公司 | Integrated multi-way valve |
| CN113175455A (en) * | 2021-04-26 | 2021-07-27 | 江苏汇智高端工程机械创新中心有限公司 | Multi-way valve confluence control structure of hydraulic excavator |
| CN113175455B (en) * | 2021-04-26 | 2024-04-02 | 江苏汇智高端工程机械创新中心有限公司 | Multi-way valve confluence control structure of hydraulic excavator |
| CN115978043A (en) * | 2022-12-30 | 2023-04-18 | 徐州阿马凯液压技术有限公司 | Load-sensitive multi-way valve with double-pump confluence control and priority function |
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Application publication date: 20190319 |