CN106321539B - Electric proportional flow distribution method and system - Google Patents
Electric proportional flow distribution method and system Download PDFInfo
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- CN106321539B CN106321539B CN201510354607.4A CN201510354607A CN106321539B CN 106321539 B CN106321539 B CN 106321539B CN 201510354607 A CN201510354607 A CN 201510354607A CN 106321539 B CN106321539 B CN 106321539B
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Abstract
The invention discloses electric proportional flow distribution method and systems, wherein electric proportional flow distribution method includes：Sensor detects seed oil road flow information, and is sent to controller；Controller judges system total flow whether in the first preset range according to the seed oil road flow information of reception, if system total flow not in the first preset range, sends control signal to electric proportional variable pump；Electric proportional variable pump is according to the total flow of each oil circuit of control Signal Regulation of reception；Controller judges that the flow on seed oil road accounts for system total flow ratio whether in the second preset range, if not in the second preset range, Regulate signal is then sent to the electric proportional throttle valve of seed oil road, so that electric proportional throttle valve adjusts the flow on valve port opening proportional assignment seed oil road.The on demand proportional flow distribution unrelated with load may be implemented in the present invention, and system total flow can automatically adjust on demand.
Description
Technical field
The present invention relates to engineering machinery field more particularly to a kind of electric proportional flow distribution methods and system.
Background technology
Multi-actuator Hydraulic System is widely used in the fields such as engineering machinery, industrial automation.Usually by singly pumping working connection
It is divided into multiple seed oil roads to realize the composite move of multi executors, this just needs to carry out reasonable distribution to flow system flow.And it respectively holds
The load that row device is born is often non-uniform, and flow is intended to small load oil circuit, and it is inclined that this results in small load oil circuit flow
Greatly, heavy load oil circuit flow is less than normal, and can not distribute according to need flow, especially (the provided stream of hydraulic pump in the case of undercurrent amount
Amount cannot be satisfied actuator requirement) above problem more highlights.So the assignment of traffic unrelated with load, flow saturation resistance are stream
Measure the key index of distribution.Diversity is presented in flow distribution device in existing market in form, and performance is short of, and at
This is higher.
Multiple traffic distribution method or system include mainly traditional type, equal proportion formula and control with changed scale formula in the prior art.Its
In, each road flow of traditional type system cannot achieve the distribution according to need unrelated with load by load effect；Although equal proportion formula can be with
It realizes that seed oil road flow is unrelated with load, but can only be distributed according to fixed proportion, can not freely be distributed on demand, and precision is not
It is high；The schematic diagram of control with changed scale formula is as shown in Figure 1, generally include variable pump 101, variable piston 102, variable throttle valve 103, pressure
Recuperation valve 104 and shuttle valve 105 select each road highest load pressure by shuttle valve 105, feed back to variable piston 102 and then drive
101 Displacement Regulation of variable pump, to meet the traffic requirement of actuator 106, and this mode is realized in a manner of hydraulic control, stream
Measure control lag, and assignment of traffic is opened loop control, the influences such as machining accuracy, abrasion in addition, precision is relatively low, it is complicated, at
This is higher.
The on demand pro rate flow unrelated with loading, high-precision, fast reaction can be realized therefore, it is necessary to a kind of
Flow allocation method and system, to meet higher work, production requirement.
Invention content
The present invention provides a kind of electric proportional flow distribution method and systems, can realize multiple traffic with load independently
Pro rate on demand, precision is high, response is fast.
According to an aspect of the invention, there is provided a kind of electricity proportional flow distribution method, including：
Sensor detects seed oil road flow information, and seed oil road flow information is sent to controller；
Whether controller judges system total flow in the first preset range according to seed oil road flow information；Judge seed oil road
Flow account for system total flow ratio whether in the second preset range；
If system total flow, not in the first preset range, controller sends control signal to electric proportional variable pump；
Electric proportional variable pump is according to the control signal conditioning system total flow of reception；
If there are the flows on seed oil road to account for system total flow ratio not in the second preset range, controller is to seed oil road
On electric proportional throttle valve send Regulate signal；
Electric proportional throttle valve adjusts valve port opening according to Regulate signal, to be divided in portion seed oil road according to valve port opening
Flow.
In one embodiment, if system total flow is not in the first preset range, controller is to electric proportional variable pump
The step of sending control signal specifically includes：
Judgement system total flow is less than the first preset range, then controller sends increase system to electric proportional variable pump and always flows
The control signal of amount；
Judgement system total flow is higher than the first preset range, then controller sends reduction system to electric proportional variable pump and always flows
The control signal of amount；
If there are the flows on seed oil road to account for system total flow ratio not in the second preset range, controller is to seed oil road
On electric proportional throttle valve send Regulate signal the step of specifically include：
Judge that the flow on seed oil road accounts for system total flow ratio and is less than the second preset range, then controller is to seed oil road
Electric proportional throttle valve sends the Regulate signal for increasing valve port opening；
Judge that the flow on seed oil road accounts for system total flow ratio and is higher than the second preset range, then controller is to seed oil road
Electric proportional throttle valve sends the Regulate signal for reducing valve port opening.
In one embodiment, sensor is the flow for the seed oil road being set between electric proportional throttle valve and actuator
Sensor, the flow value on detection seed oil road, and it is sent to controller；
Whether controller judges system total flow in the first preset range according to seed oil road flow information；Judge seed oil
The flow on road accounts for system total flow ratio, and whether the step in the second preset range is specially：
Controller obtains the movement velocity of actuator according to seed oil road flow information, judge system total flow whether with
In first preset range of actuator motions velocity correlation connection；Judge that whether the flow on seed oil road accounts for system total flow ratio
In two preset ranges.
In one embodiment, sensor is the motion sensor being set in seed oil road on actuator, detects actuator
One or more of displacement, speed, angular displacement or angular speed, and be sent to controller；
Whether controller judges system total flow in the first preset range according to seed oil road flow information；Judge seed oil
The flow on road accounts for system total flow ratio, and whether the step in the second preset range is specially：
Controller obtains son according to one or more of the displacement of the actuator of reception, speed, angular displacement or angular speed
Whether oil circuit flow information judges system total flow in the first preset range；Judge that the flow on seed oil road accounts for system total flow
Whether ratio is in the second preset range.
In one embodiment, solenoid directional control valve adjusting actuator of the controller in above-described embodiment on seed oil road
After the direction of motion, judged according to seed oil road flow information, and sends control signal or Regulate signal.
According to an aspect of the invention, there is provided a kind of electricity proportional flow distribution system, including：Controller, for adjusting
The electric proportional variable pump of section system total flow is flowed for the electric proportional throttle valve of regulator oil circuit flow and for detecting seed oil road
The sensor of information is measured, wherein：
In each seed oil road, one end of electric proportional throttle valve is connected to electric proportional variable pump, and the other end is connected to execution
Device；Electric proportional variable pump, electric proportional throttle valve and sensor are respectively electrically connected to controller；
Controller is adapted to be to work as obtains system total flow not in the first preset range according to the flow information on seed oil road
When, trigger electric proportional variable pump regulating system total flow；When the flow for obtaining seed oil road according to seed oil road flow information accounts for system
When total flow ratio is not in the second preset range, the electric proportional throttle valve of triggering seed oil road adjusts valve port opening.
In one embodiment, sensor is the flow for the seed oil road being set between electric proportional throttle valve and actuator
Sensor, the flow value on detection seed oil road.
In one embodiment, sensor is the motion sensor being set in seed oil road on actuator, detects actuator
One or more of displacement, speed, angular displacement or angular speed.
In one embodiment, the system in above-described embodiment further includes being changed for the electromagnetism of the adjusting actuator direction of motion
To valve, solenoid directional control valve is set to the road of the seed oil between electric proportional throttle valve and actuator.
In one embodiment, controller is adapted to be and is less than when obtaining system total flow according to the flow information on seed oil road
When the first preset range, triggers electric proportional variable pump and increase system total flow；When system total flow is higher than the first preset range,
The electric proportional variable pump of triggering reduces system total flow；It is further adapted to work as and seed oil road flow is obtained according to the flow information on seed oil road
When accounting for system total flow ratio less than the second preset range, the electric proportional throttle valve of triggering seed oil road increases valve port opening；When
When seed oil road flow accounts for system total flow ratio higher than the second preset range, the electric proportional throttle valve of triggering seed oil road reduces valve
Mouth aperture.
The electric proportional flow distribution method and system of the present invention can realize that multiple traffic independently compares on demand with load
Example distribution, precision is high, response is fast.
In addition, the present invention can also flow saturation resistance, system total flow can automatically adjust on demand, simple and practical, modularization,
User demand is flexibly met.
Description of the drawings
It to describe the technical solutions in the embodiments of the present invention more clearly, below will be to required in embodiment or description
The attached drawing used is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, right
For those of ordinary skill in the art, without having to pay creative labor, it can also be obtained according to these attached drawings
Other attached drawings.
Fig. 1 is the schematic diagram of flow distributing system one embodiment in the prior art
Fig. 2 is the schematic diagram of the electric proportional flow distribution method one embodiment of the present invention.
Fig. 3 is the schematic diagram of the electric proportional flow distribution system one embodiment of the present invention.
Fig. 4 is the schematic diagram of another embodiment of the electric proportional flow distribution system of the present invention.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Below
Description only actually at least one exemplary embodiment is illustrative, is never used as to the present invention and its application or makes
Any restrictions.Based on the embodiments of the present invention, those of ordinary skill in the art are not making creative work premise
Lower obtained every other embodiment, shall fall within the protection scope of the present invention.
Unless specifically stated otherwise, positioned opposite, the digital table of the component and step that otherwise illustrate in these embodiments
It is not limited the scope of the invention up to formula and numerical value.
Fig. 2 is the schematic diagram of the electric proportional flow distribution method one embodiment of the present invention, it is preferred that the method for the present embodiment
Step can be executed by the system of the present invention, wherein：
Step 201, sensor detection seed oil road flow information, and seed oil road flow information is sent to controller.Wherein,
Actuator can be hydraulic cylinder, can also be the devices such as hydraulic motor.
Step 202, whether controller judges system total flow in the first preset range according to seed oil road flow information；Sentence
The flow on disconnected seed oil road accounts for system total flow ratio whether in the second preset range.If judging, system total flow is not pre- first
Determine in range, then enters step 203；If judging, there are the flows on seed oil road to account for system total flow ratio not in the second preset range
It is interior, then enter step 205.If judging system total flow in the first preset range, controller is not sent out to electric proportional variable pump
Send control signal；If judging, seed oil road accounts for system total flow ratio in the second preset range, and controller continues to monitor the son
Oil circuit flow information.
Step 203, controller sends control signal to electric proportional variable pump.
Step 204, electric proportional variable pump is total to system to meet according to the control signal conditioning system total flow of reception
The demand of flow, terminates process later.
Step 205, controller sends Regulate signal to the electric proportional throttle valve of seed oil road.
Step 206, electric proportional throttle valve adjusts valve port opening according to Regulate signal, to be divided in proportion according to valve port opening
Flow with the seed oil road.
A kind of electric proportional flow distribution method of the present invention, can realize multiple traffic and load independently ratio on demand
Distribution, precision is high, response is fast.
In addition, the present invention can also flow saturation resistance, system total flow can automatically adjust on demand, simple and practical, modularization,
User demand is flexibly met.
Preferably, the sensor in the above method is flow sensor, is set to electric proportional throttle valve and respective actuators
Between seed oil road, detect the seed oil road flow information where actuator, and be sent to controller.Controller is according to reception
Seed oil road flow information, can obtain the movement velocity of actuator.For example, when actuator is hydraulic cylinder, flow sensor
The flow value of detection is Q, then the speed V=Q/A of hydraulic cylinder, wherein A is the active area of hydraulic cylinder oil suction chamber；When holding
When row device is hydraulic motor, motor rotary speed W=Q/L, wherein L is the discharge capacity of hydraulic motor.
When sensor is flow sensor, in practical applications, usually multiple actuators complete composite move, need to protect
Specific speed proportionate relationship is held, therefore, when completing composite move, the seed oil road where actuator is also required to keep specifically to compare
Example relationship.By detecting each seed oil road flow information, each seed oil road flow value can be obtained, and then controller may determine that system
Whether whether the flow on the seed oil road in the first preset range and where each actuator accounts for system total flow ratio to total flow
In the second preset range.
When the total oil mass of system is less than the first preset range, illustrate that the total oil mass of system cannot be satisfied the action need of actuator
It asks, at this point, controller sends out the control signal of increase system total flow to electric proportional variable pump, electric proportional variable pump is according to control
Signal increases system total flow；When the total oil mass of system is more than the first preset range, illustrate that total oil mass has been more than the dynamic of actuator
Make demand, at this point, controller sends out the control signal of reduction system total flow to electric proportional variable pump, electric proportional variable pump according to
It controls signal and reduces system total flow.Those skilled in the art are through the invention it will be appreciated that the first preset range can be with
It is that the numberical range centered on system total flow value associated with each actuator operation acts, specific range can be according to difference
Use condition and required precision set.
When the flow on the seed oil road where some actuator accounts for system total flow ratio less than the second preset range, say
The bright seed oil road flow is less than the proportional region of setting, at this point, controller sends out increase to the electric proportional throttle valve on the seed oil road
The Regulate signal of valve port opening, electric proportional throttle valve increase valve port opening according to Regulate signal, increase the flow on the seed oil road；When
When the flow on the seed oil road where the actuator accounts for system total flow ratio more than the second preset range, controller is to the seed oil road
Electric proportional throttle valve send out reduce valve port opening Regulate signal, electric proportional throttle valve according to Regulate signal reduce valve port open
Degree.
Preferably, in above-described embodiment, it is less than the when the flow on the seed oil road where actuator accounts for system total flow ratio
The electric proportional throttle valve opening on two preset ranges and the seed oil road is maximum, and electric proportional variable pump can not also provide bigger oil mass
When, the electric proportional throttle valve valve port opening on other seed oil roads can be reduced simultaneously, so that each seed oil road binders amount is maintained at scheduled
In proportional region, to meet the action demand of actuator.
Those skilled in the art are through the invention it will be appreciated that the second preset range can be, with actuator work
It acts associated seed oil road flow and accounts for numberical range centered on the ratio value of system total flow, specific range can be according to difference
Use condition and required precision set.
The electric proportional flow distribution method of the present invention can realize multiple traffic with load independently using closed-loop control
Pro rate on demand, while flow saturation resistance, system total flow can automatically adjust on demand, and when there is emergency case, some is held
Row device breaks down, and when place seed oil road flow increases or reduces suddenly, controller can be instantly available the signal of sensor, touches
Control signal or Regulate signal are sent out, so that the on demand pro rate flow unrelated with load is realized on each seed oil road.
In addition, the present invention can also flow saturation resistance, system total flow can automatically adjust on demand, simple and practical, modularization,
User demand is flexibly met.
Preferably, the sensor in the above method can also be motion sensor, be set on actuator, detect actuator
One or more of displacement, speed, angular displacement or angular speed value.Controller can be sent above-mentioned by motion sensor
Information carries out Bit andits control or speed control to actuator.For example, when actuator is hydraulic cylinder, motion sensor senses oil
The displacement of cylinder inner piston rod or speed；When actuator is hydraulic motor, the angle of motion sensor senses motor output shaft
Or angular speed.
By taking actuator is hydraulic cylinder as an example, each actuator at work, needs multi-cylinder synchronous, equal proportion to be acted.
At this moment, the displacement state of each actuator of motion sensor senses and it is sent to controller.When controller judges that system total flow is low
When first predetermined value, illustrate that the system total flow that electric proportional variable pump provides is unsatisfactory for the demand that each actuator acts, at this point,
Controller sends the control signal of increase system total flow to electric proportional variable pump, and electric proportional variable pump increases according to control signal
System total flow；When controller judges that the system total flow of oil circuit is higher than first predetermined value, illustrate that electric proportional variable pump provides
System total flow be more than the action of each actuator demand, at this point, to electric proportional variable pump to send reduction system total for controller
The control signal of flow, electric proportional variable pump reduce system total flow according to control signal.
By need to control each hydraulic cylinder displacement it is equal for, when some actuator goes wrong, such as displacement subtracts suddenly
Hour, the flow on seed oil road accounts for system total flow ratio and is less than where controller judges it according to the data that motion sensor is sent
Second predetermined value sends the Regulate signal for increasing valve port opening to the electric proportional throttle valve of the seed oil road, to increase this
The flow on seed oil road makes displacement and other actuator holding position phase shifts of the actuator etc..When actuator displacement increases suddenly,
The flow on seed oil road where controller judges it according to the data that motion sensor is sent accounts for system total flow ratio and is higher than second
Predetermined value sends the Regulate signal for reducing valve port opening to the electric proportional throttle valve on the seed oil road, to reduce the seed oil road
Flow, make displacement and other actuator holding position phase shifts of the actuator etc..
Preferably, in above-described embodiment, it is less than the second predetermined model when the flow on some seed oil road accounts for system total flow ratio
It encloses and the electric proportional throttle valve on seed oil road opening is maximum, it, can be with when electric proportional variable pump can not also provide bigger oil mass
The electric proportional throttle valve valve port opening for reducing other seed oil roads simultaneously, so that each seed oil road flow is maintained at scheduled proportional region
It is interior, to meet the action demand of actuator.
Preferably, further include in above-described embodiment after the direction of motion of solenoid directional control valve adjusting actuator, controller after
It is continuous to be judged according to each seed oil road flow information, and send corresponding control signal or Regulate signal.
Those skilled in the art it will be appreciated that control signal and Regulate signal triggering can be carried out at the same time,
It can not be carried out at the same time, i.e., electric proportional variable pump and electric proportional throttle valve can be adjusted simultaneously, and cooperation is realized unrelated with load
Pro rate flow on demand；Electric proportional variable pump or electric proportional throttle valve can also be only adjusted to realize according to actual conditions
The on demand pro rate flow unrelated with load.
The electric proportional flow distribution method of the present invention can realize multichannel seed oil road flow and load using closed-loop control
Independently pro rate, while flow saturation resistance on demand, system total flow can automatically adjust on demand, when there is emergency case,
Some actuator breaks down, and when place seed oil road flow increases or reduces suddenly, controller can be instantly available sensor
Signal sends out control signal or Regulate signal, so that the on demand pro rate stream unrelated with load is realized on each seed oil road
Amount.
In addition, the present invention can also flow saturation resistance, system total flow can automatically adjust on demand, simple and practical, modularization,
User demand is flexibly met.
Fig. 3 is the schematic diagram of one embodiment of the electric proportional flow distribution system of the present invention, as shown in figure 3, including control
Device 304, for the electric proportional variable pump 301 of regulating system total flow, for the electric proportional throttle valve of regulator oil circuit flow
302i and sensor 303i for detecting seed oil road flow information, wherein assuming there is N number of actuator 305, each actuator is used
Actuator 305i is indicated, wherein 1≤i≤N.
In each seed oil road, one end of electric proportional throttle valve 302i is connected to electric proportional variable pump 301, other end connection
To actuator 305i, electric proportional variable pump 301, electricity proportional throttle valve 302i and sensor 303i are respectively electrically connected to controller
304, solid line is oil circuit connection in figure, dotted line signal in order to control.
Controller 304 is adapted to be to work as obtains system total flow not in the first preset range according to the flow information on seed oil road
When interior, 301 regulating system total flow of electric proportional variable pump is triggered；When the flow for obtaining seed oil road according to seed oil road flow information accounts for
When system total flow ratio is not in the second preset range, the electric proportional throttle valve 302i of triggering seed oil road adjusts valve port and opens
Degree.If controller 304 judges system total flow in the first preset range, controller 304 is not sent out to electric proportional variable pump 301
Send control signal；If controller 304 judges that the flow on the seed oil road where actuator 305i accounts for system total flow ratio second
In preset range, then continue to monitor the seed oil road flow information.
A kind of electric proportional flow distribution system of the present invention, can realize multiple traffic and load independently ratio on demand
Distribution, precision is high, response is fast.
In addition, the present invention can also flow saturation resistance, system total flow can automatically adjust on demand, simple and practical, modularization,
User demand is flexibly met.
Preferably, the sensor 303 in above-described embodiment is flow sensor, is set to electric proportional throttle valve 302 and phase
The seed oil road between actuator 305, the flow value on the seed oil road where detection actuator 305 are answered, and is sent to controller
304.Controller 304 can obtain the movement velocity of actuator 305 according to the flow value of reception.For example, when actuator 305 is
When hydraulic cylinder, the flow value that flow sensor 303 detects is Q, then the speed V=Q/A of hydraulic cylinder, wherein A is hydraulic oil
The active area of cylinder oil suction chamber；When actuator 305 is hydraulic motor, motor rotary speed W=Q/L, wherein L is hydraulic motor
Discharge capacity.In practical applications, it usually needs the 305 cooperating operation execution of multiple actuators.Each actuator 305i can be
Hydraulic cylinder can also be the hydraulic component of the other forms such as hydraulic motor.When completing composite move, where actuator 305i
The flows of seed oil road binders amount and other oil circuits need to keep specific proportionate relationship.By detecting each seed oil road flow information,
The operating status of each actuator 305i can be obtained, and then controller 304 may determine that whether system total flow is predetermined first
The flow on the seed oil road in range and where actuator 305i accounts for system total flow ratio in corresponding second preset range
It is interior.
When system total flow is less than the first preset range, illustrate that system total flow cannot be satisfied the action of actuator 305i
Demand, at this point, controller 304 sends out the control signal of increase system total flow, electric proportional variable pump to electric proportional variable pump 301
301 increase system total flow according to control signal；When system total flow is more than the first preset range, illustrate that system total flow is super
The action demand of actuator 305 is crossed, at this point, controller 304 sends out the control of reduction system total flow to electric proportional variable pump 301
Signal processed, electric proportional variable pump 301 reduce system total flow according to control signal.Those skilled in the art through the invention can be with
It is appreciated that, the first preset range can be the number centered on system total flow value associated with each actuator operation acts
It is worth range, specific range can be set according to different use conditions and required precision.
When the flow on the seed oil road where some actuator 305i accounts for system total flow ratio in advance less than corresponding second
When determining range, illustrate that the seed oil road flow is less than the proportional region of setting, at this point, controller 304 is to electric proportional throttle valve 302i
The Regulate signal for increasing valve port opening is sent out, electric proportional throttle valve 302i increases valve port opening according to Regulate signal, increases and executes
The flow on seed oil road where device 305i；It is more than phase when the flow on the seed oil road where actuator 305i accounts for system total flow ratio
When the second preset range answered, controller 304 sends out the tune for reducing valve port opening to the electric proportional throttle valve 302i on the seed oil road
Signal is saved, electric proportional throttle valve 302i reduces valve port opening according to Regulate signal.
Those skilled in the art are through the invention it will be appreciated that the second preset range can be, with actuator 305i
The associated seed oil road flow of operation acts accounts for the numberical range centered on the ratio value of system total flow, and specific range can basis
Different use conditions and required precision are set.
Preferably, in above-described embodiment, when to account for system total flow ratio small for the flow on the seed oil road where actuator 305i
Electric proportional throttle valve 302i openings in the second preset range and the seed oil road are maximum, and electric proportional variable pump 301 can not yet
When bigger oil mass is provided, the electric proportional throttle valve valve port opening of other oil circuits can be reduced simultaneously, so that each seed oil road binders amount is protected
It holds in scheduled proportional region, to meet the action demand of actuator.
Preferably, as shown in figure 3, further including seed oil road where being set to actuator 305i in above-described embodiment, for adjusting
Save the solenoid directional control valve 306i of the direction of motion of actuator 305i, such as two-position four way change valve.
In one embodiment, oil circuit direction in solenoid directional control valve 306i switching seed oils road can be controlled by controller 304,
So as to the direction of motion of adjusting actuator 305i.After the direction of motion of solenoid directional control valve 306i adjusting actuators 305i, control
The continuation of device 304 is judged according to the seed oil road flow information of reception, and sends corresponding control signal or Regulate signal.
The electric proportional flow distribution system of the present invention can realize multichannel seed oil road flow and load using closed-loop control
Independently pro rate, while flow saturation resistance on demand, system total flow can automatically adjust on demand, when there is emergency case,
Some actuator breaks down, and when place seed oil road flow increases or reduces suddenly, controller can be instantly available sensor
Signal sends out control signal or Regulate signal, so that the on demand pro rate stream unrelated with load is realized on each seed oil road
Amount.
In addition, the present invention can also flow saturation resistance, system total flow can automatically adjust on demand, simple and practical, modularization,
User demand is flexibly met.
Fig. 4 is the schematic diagram of another embodiment of the electric proportional flow distribution system of the present invention.As shown in figure 4, including electricity ratio
Example variable pump 401, electric proportional throttle valve 402, sensor 403 and controller 404, electric proportional variable pump 401 throttle through electric ratio
Valve 402 is connected to actuator 405, and solid line is oil circuit connection in figure, dotted line signal in order to control, wherein electric proportional variable pump 401,
Electric proportional throttle valve 402 and controller 404 and electric proportional variable pump 301, electric proportional throttle valve 302 and 304 phase of controller in Fig. 3
Same or similar, sensor 403 is motion sensor, is set on actuator 405, the displacement of detection actuator 405, speed, angle
One or more of displacement or angular speed are worth.The above- mentioned information pair that controller 404 can be sent by motion sensor 403i
Actuator 405i carries out Bit andits control or speed control, such as needs to realize that each actuator displacement is equal or displacement difference is equal.
For example, when actuator 405i is hydraulic cylinder, the displacement of motion sensor 403i detection oil cylinder inner piston rod or
Person's speed；When actuator 405i is hydraulic motor, the angle or angular speed of motion sensor 403i detection motor output shafts.
By taking actuator 405i is hydraulic cylinder as an example, each actuator at work, needs multi-cylinder synchronous, equal proportion into action
Make.At this moment, motion sensor 403i detects the displacement state of actuator 405i, and is sent to controller 404, when controller 404
According to the displacement state of each actuator of reception, the flow information on each seed oil road is obtained, judges that system total flow is pre- less than first
When definite value, illustrate that the system total flow that electric proportional variable pump 401 provides is unsatisfactory for the demand that each actuator acts, at this point, control
Device 404 sends the control signal of increase system total flow to electric proportional variable pump 401, and electric proportional variable pump 401 is believed according to control
Number increase system total flow；When controller 404 judges that system total flow is higher than first predetermined value, illustrate electric proportional variable pump
The 401 system total flows that provide have been more than the demand of each actuator 405i action, at this point, controller 404 is to electric proportional variable pump
401 send the control signal of reduction system total flow, and electric proportional variable pump 401 reduces system total flow according to control signal.
By need to control each hydraulic cylinder displacement it is equal for, when actuator 405i goes wrong, such as displacement subtracts suddenly
Hour, seed oil road flow information where controller 404 obtains it according to the motion sensor 403i data sent judges its place
The flow on seed oil road accounts for system total flow ratio and is less than the second predetermined value, then is sent to electric proportional throttle valve 402i and increase valve port
The Regulate signal of aperture makes the displacement of actuator 405i keep displacement with other actuators to increase the flow on the seed oil road
It is equal.When displacement increases suddenly, controller judges that the flow on its seed oil road accounts for according to the motion sensor 403i data sent
System total flow ratio is higher than the second predetermined value, then the adjusting letter for reducing valve port opening is sent to electric proportional throttle valve 402i
Number, to reduce the flow on the seed oil road, make displacement and other actuator holding position phase shifts of actuator 405i etc..
Preferably, in above-described embodiment, when the flow on the seed oil road where actuator 405i accounts for system total flow ratio
The electric proportional throttle valve 402i openings of two preset ranges and the oil circuit are maximum, and electric proportional variable pump 401 can not also provide more
When big oil mass, the electric proportional throttle valve valve port opening on other seed oil roads can be reduced simultaneously, so that each seed oil road flow is maintained at
In scheduled proportional region, and then meet the action demand of actuator.
Those skilled in the art are through the invention it will be appreciated that the second preset range can be, with actuator 405i
First associated seed oil road flow accounts for the numberical range centered on the ratio value of system total flow to operation acts, and specific range can basis
Different use conditions and required precision are set.
Preferably, it as shown in figure 4, further including seed oil road where being set to actuator 405i in above-described embodiment, is used for
The solenoid directional control valve 406i of the direction of motion of adjusting actuator 405i, such as two-position four way change valve.
In one embodiment, the direction that solenoid directional control valve 406i switching seed oils road can be controlled by controller 404, so as to
The direction of motion of adjusting actuator 405i.After the direction of motion of solenoid directional control valve 406i adjusting actuators 405i, controller 404
Continue to be judged according to the seed oil road flow information where the actuator 405i of reception, and sends corresponding control signal or adjust letter
Number.
Those skilled in the art it will be appreciated that control signal and Regulate signal triggering can be carried out at the same time,
It can not be carried out at the same time, i.e., electric proportional variable pump and electric proportional throttle valve can be adjusted simultaneously, and cooperation is realized unrelated with load
Pro rate flow on demand can also only adjust electric proportional variable pump or electric proportional throttle valve to realize according to actual conditions
The on demand pro rate flow unrelated with load.
The electric proportional flow distribution system of the present invention can realize multiple traffic with load independently using closed-loop control
Pro rate on demand, while flow saturation resistance, system total flow can automatically adjust on demand, and when there is emergency case, some is held
When row device failure oil circuit oil mass increases or reduces suddenly, controller can be instantly available the signal of sensor, and triggering is sent out
Signal or Regulate signal are controlled, so that each oil circuit realizes the on demand pro rate flow unrelated with load.
In addition, the present invention can also flow saturation resistance, system total flow can automatically adjust on demand, simple and practical, modularization,
User demand is flexibly met.
The electric proportional flow distribution method and system of the present invention are illustrated with reference to Fig. 2 and Fig. 3.
The action of each actuator 305i can be divided into while act and intermitten.
Action phase simultaneously, original state, 301 discharge capacity of electric proportional variable pump is maximum, and electric proportional throttle valve 302i valve ports are opened
To maximum, the valve position of solenoid directional control valve 306i is adjusted according to the direction of action of actuator 305i.If controller 304 judges that system is total
Flow cannot be satisfied the action demand of actuator, that is, be less than the first preset range, then controller 304 is sent to electric proportional variable pump
Signal is controlled, electric proportional variable pump 301 is made to increase discharge capacity；If being higher than the first preset range, reduce discharge capacity.Flow sensor
Seed oil road flow information where 303i detections actuator 305i is simultaneously sent to controller 304, and controller 304 is flowed according to seed oil road
Amount information judges that the flow on the seed oil road where actuator 305i accounts for system total flow ratio whether in the second preset range, if
Less than the second preset range, then the Regulate signal for increasing valve port opening is sent to electric proportional throttle valve 302i；If pre- higher than second
Determine range, then sends the Regulate signal for reducing valve port opening to electric proportional throttle valve 302i.
In the intermitten stage, some actuators need not have been acted or acted to end of travel in the stage.This
When, the electric proportional throttle valve 302i on seed oil road is closed where acting the actuator 305i completed.Controller 304 is to electric ratio
Variable pump 301 sends the control signal of reduction system total flow, ensures the speed requirement of the unfinished actuator of other actions.When
When actuator 305i becomes work from stopping action, controller 304 sends increase system total flow to electric proportional variable pump 301
Signal is controlled, the Regulate signal for increasing valve port opening is sent to electric proportional throttle valve 302i, so that the flow on each seed oil road meets
Required proportionate relationship.Preferably, controller 304 sends to other actuators also according to the actual conditions on each seed oil road and adjusts letter
Number, it is adjusted with the ratio to each seed oil road flow.
A kind of electric proportional flow distribution method of the present invention, can realize multiple traffic and load independently ratio on demand
Distribution, precision is high, response is fast.
In addition, the present invention can also flow saturation resistance, system total flow can automatically adjust on demand, simple and practical, modularization,
User demand is flexibly met.
One of ordinary skill in the art will appreciate that realizing that all or part of step of above-described embodiment can pass through hardware
It completes, relevant hardware can also be instructed to complete by program, the program can be stored in a kind of computer-readable
In storage medium, storage medium mentioned above can be read-only memory, disk or CD etc..
Description of the invention provides for the sake of example and description, and is not exhaustively or will be of the invention
It is limited to disclosed form.Many modifications and variations are obvious for the ordinary skill in the art.It selects and retouches
It states embodiment and is to more preferably illustrate the principle of the present invention and practical application, and those skilled in the art is enable to manage
Various embodiments with various modifications of the solution present invention to design suitable for special-purpose.
Claims (10)
1. a kind of electricity proportional flow distribution method, which is characterized in that including：
Sensor detects seed oil road flow information, and seed oil road flow information is sent to controller；
Whether controller judges system total flow in the first preset range according to seed oil road flow information；Judge the stream on seed oil road
Amount accounts for system total flow ratio whether in the second preset range；
If system total flow, not in the first preset range, controller sends control signal to electric proportional variable pump；
Electric proportional variable pump is according to the control signal conditioning system total flow of reception；
If there are the flows on seed oil road to account for system total flow ratio not in the second preset range, controller is to seed oil road
Electric proportional throttle valve sends Regulate signal；
Electric proportional throttle valve adjusts valve port opening according to Regulate signal, to be divided in portion the stream on seed oil road according to valve port opening
Amount.
2. according to the method described in claim 1, it is characterized in that, sensor be set to electric proportional throttle valve and actuator it
Between seed oil road flow sensor, the flow value on detection seed oil road, and be sent to controller；
Whether controller judges system total flow in the first preset range according to seed oil road flow information；Judge seed oil road
Flow accounts for system total flow ratio, and whether the step in the second preset range is specially：
Controller obtains the movement velocity of actuator according to seed oil road flow information, judge system total flow whether with execution
In associated first preset range of device movement velocity；Judge whether the flow on seed oil road accounts for system total flow ratio pre- second
Determine in range.
3. according to the method described in claim 1, it is characterized in that, sensor is the movement being set in seed oil road on actuator
Sensor detects one or more of displacement, speed, angular displacement or angular speed of actuator, and is sent to controller；
Whether controller judges system total flow in the first preset range according to seed oil road flow information；Judge seed oil road
Flow accounts for system total flow ratio, and whether the step in the second preset range is specially：
Controller obtains seed oil road according to one or more of the displacement of the actuator of reception, speed, angular displacement or angular speed
Whether flow information judges system total flow in the first preset range；Judge that the flow on seed oil road accounts for system total flow ratio
Whether in the second preset range.
4. according to the method described in any one of claim 1-3, which is characterized in that further include：
After the direction of motion of solenoid directional control valve adjusting actuator of the controller on seed oil road, according to seed oil road flow information into
Row judges, and sends control signal or Regulate signal.
5. according to the method described in claim 4, it is characterized in that, if system total flow is controlled not in the first preset range
The step of device processed sends control signal to electric proportional variable pump specifically includes：
Judgement system total flow is less than the first preset range, then controller sends increase system total flow to electric proportional variable pump
Control signal；
Judgement system total flow is higher than the first preset range, then controller sends reduction system total flow to electric proportional variable pump
Control signal；
If there are the flows on seed oil road to account for system total flow ratio not in the second preset range, controller is to seed oil road
The step of electric proportional throttle valve transmission Regulate signal, specifically includes：
Judge that the flow on seed oil road accounts for system total flow ratio and is less than the second preset range, then electric ratio of the controller to seed oil road
Example throttle valve sends the Regulate signal for increasing valve port opening；
Judge that the flow on seed oil road accounts for system total flow ratio and is higher than the second preset range, then electric ratio of the controller to seed oil road
Example throttle valve sends the Regulate signal for reducing valve port opening.
6. a kind of electricity proportional flow distribution system, which is characterized in that including：Controller, the electric ratio for regulating system total flow
Example variable pump, the sensor for the electric proportional throttle valve of regulator oil circuit flow and for detecting seed oil road flow information,
In：
In each seed oil road, one end of electric proportional throttle valve is connected to electric proportional variable pump, and the other end is connected to actuator；Electricity
Proportional variable pump, electric proportional throttle valve and sensor are respectively electrically connected to controller；
Whether controller is adapted to be judges system total flow in the first preset range according to seed oil road flow information；Judge son
The flow of oil circuit accounts for system total flow ratio whether in the second preset range；When obtaining system according to the flow information on seed oil road
When total flow is not in the first preset range, electric proportional variable pump regulating system total flow is triggered；Believe when according to seed oil road flow
When the flow that breath obtains seed oil road accounts for system total flow ratio not in the second preset range, the electric ratio section of triggering seed oil road
Flow valve regulation valve port opening.
7. system according to claim 6, which is characterized in that sensor be set to electric proportional throttle valve and actuator it
Between seed oil road flow sensor, the flow value on detection seed oil road.
8. system according to claim 6, which is characterized in that sensor is the movement being set in seed oil road on actuator
Sensor detects one or more of displacement, speed, angular displacement or angular speed of actuator.
9. according to the system described in any one of claim 6-8, which is characterized in that further include being moved for adjusting actuator
The solenoid directional control valve in direction, solenoid directional control valve are set to the road of the seed oil between electric proportional throttle valve and actuator.
10. system according to claim 9, which is characterized in that
Controller is adapted to be when obtaining system total flow less than the first preset range according to the flow information on seed oil road, triggering
Electric proportional variable pump increases system total flow；When system total flow is higher than the first preset range, triggers electric proportional variable pump and subtract
Mini system total flow；It is further adapted to that account for system total flow ratio low when obtain seed oil road flow according to the flow information on seed oil road
When the second preset range, the electric proportional throttle valve of triggering seed oil road increases valve port opening；It is total that group oil circuit flow accounts for system
When flow proportional is higher than the second preset range, the electric proportional throttle valve of triggering seed oil road reduces valve port opening.
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| CN107191423B (en) * | 2017-05-19 | 2019-05-03 | 徐州工业职业技术学院 | A kind of hydraulic synchronization control loop |
| CN107269604A (en) * | 2017-07-25 | 2017-10-20 | 江苏谷登工程机械装备有限公司 | A kind of crawler travel synchronous control system |
| CN107191441A (en) * | 2017-07-27 | 2017-09-22 | 徐州重型机械有限公司 | Hydraulic system, the control method of hydraulic system and engineering machinery |
| CN110502041B (en) * | 2019-07-22 | 2022-10-21 | 北京控制工程研究所 | Micro-flow control system and method based on piezoelectric proportional valve |
| CN111963501A (en) * | 2020-09-09 | 2020-11-20 | 江苏谷登工程机械装备有限公司 | Simple synchronous shunting system |
| CN113550374B (en) * | 2021-06-30 | 2022-08-12 | 徐州徐工挖掘机械有限公司 | Flow control method for excavator operation and method for improving lifting speed of movable arm |
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| DE69936975T2 (en) * | 1998-08-12 | 2008-05-29 | Hitachi Construction Machinery Co., Ltd. | CONSTRUCTION MACHINE WITH AN ELECTRONIC CONTROL CIRCUIT |
| CN101180469B (en) * | 2005-05-18 | 2010-10-13 | 株式会社小松制作所 | Hydraulic controller of construction machinery |
| JP4867614B2 (en) * | 2006-11-24 | 2012-02-01 | コベルコ建機株式会社 | Control device and work machine equipped with the same |
| CN101340358B (en) * | 2007-07-04 | 2011-04-20 | 鼎桥通信技术有限公司 | Flow control method, system and flow control entity |
| CN102312875A (en) * | 2011-08-18 | 2012-01-11 | 长沙中联重工科技发展股份有限公司 | Hydraulic oil flow distribution method and device for hydraulic system |
| CN102734144B (en) * | 2012-06-15 | 2016-02-10 | 三一重机有限公司 | Flow distributing system and flow allocation method |
| CN202867378U (en) * | 2012-10-10 | 2013-04-10 | 山东中川液压有限公司 | Flow distribution device |
| CN203926181U (en) * | 2014-06-13 | 2014-11-05 | 昆山三一数字科技有限公司 | Single pump list multi-way valve system, intelligent hydraulic flow distributing system and engineering machinery |
| CN104481953B (en) * | 2014-12-12 | 2016-06-15 | 燕山大学 | The pile-up valve that independently controls of throttling limit that assignment of traffic is unrelated with load pressure |
| CN205001273U (en) * | 2015-06-24 | 2016-01-27 | 徐工集团工程机械股份有限公司 | Electric proportional flow distribution system |
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