CN106321539A - Method and system for electric proportional flow quantity distribution - Google Patents
Method and system for electric proportional flow quantity distribution Download PDFInfo
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- CN106321539A CN106321539A CN201510354607.4A CN201510354607A CN106321539A CN 106321539 A CN106321539 A CN 106321539A CN 201510354607 A CN201510354607 A CN 201510354607A CN 106321539 A CN106321539 A CN 106321539A
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Abstract
The invention discloses a method and system for electric proportional flow quantity distribution. The method for the electric proportional flow quantity distribution comprises the steps that a sensor detects sub-oil way flow quantity information and sends the information to a controller; the controller judges whether a total flow quantity of the system stays within a first preset scope according to the received sub-oil way flow quantity information, wherein a control signal is sent to an electric proportional variable pump if the total flow quantity of the system does not stay within the first preset scope; the electric proportional variable pump adjusts the total flow quantity of each oil way according to the received control signal; and the controller judges whether the proportion of the sub-oil way flow quantity in the total flow quantity of the system stays within a second preset scope, wherein an adjustment signal is sent to an electric proportional throttle valve on a sub-oil way if the proportion does not stay within the second preset scope, so that the electric proportional throttle valve can adjust valve aperture and distribute the flow quantity of the sub-oil way in proportion. According to the invention, flow distribution which is based on a demanded proportion and irrelevant with loads can be achieved; and the total flow quantity of the system can be adjusted automatically according to demands.
Description
Technical field
The present invention relates to engineering machinery field, particularly relate to a kind of electricity proportional flow distribution method and
System.
Background technology
Multi-actuator Hydraulic System is widely used in the field such as engineering machinery, industrial automation.Logical
Chang Youdan pump working connection is divided into multiple seed oil road to realize the composite move of multi executors, and this just needs
Flow system flow is carried out reasonable distribution.And load that each executor is born is the most uneven
, flow trends towards little load oil circuit, and it is bigger than normal that this results in little load oil circuit flow, heavy load
Oil circuit flow is less than normal, it is impossible to distribution according to need flow, especially (hydraulic pressure in the case of undercurrent amount
The thered is provided flow of pump cannot meet executor and require) the problems referred to above more highlight.So with load
Unrelated assignment of traffic, flow saturation resistance are the key indexs of assignment of traffic.In existing market
Flow distribution device presents multiformity in form, and performance has been short of, and relatively costly.
In prior art, multichannel flow allocation method or system mainly include traditional type, equal proportion formula
With control with changed scale formula.Wherein, traditional type system each road flow is by load effect, it is impossible to realize with negative
Carry unrelated distribution according to need；Although it is unrelated with load that equal proportion formula can realize seed oil road flow,
But distribute only in fixed proportion, it is impossible to on-demand freely distribute, and precision is the highest；No-load voltage ratio
The schematic diagram of example formula as it is shown in figure 1, generally include variable pump 101, variable piston 102, can
Variable throttle valve 103, pressure-compensated valve 104 and shuttle valve 105, selected each road by shuttle valve 105
Highest load pressure, feeds back to variable piston 102 and then drives variable pump 101 Displacement Regulation,
To meet the traffic requirement of executor 106, and this mode is to realize in the way of hydraulic control,
Flow-rate adjustment is delayed, and assignment of traffic is opened loop control, in addition the impact such as machining accuracy, abrasion,
Precision is relatively low, structure is complicated, relatively costly.
Accordingly, it would be desirable to a kind of be capable of with load unrelated by demand pro rate flow, height
Precision, rapid-action flow allocation method and system, to meet higher work, to produce need
Ask.
Summary of the invention
The invention provides a kind of electricity proportional flow distribution method and system, it is possible to realize multi-way stream
Amount and load are independently by demand pro rate, and precision is high, response is fast.
According to an aspect of the invention, it is provided a kind of electricity proportional flow distribution method, including:
Sensor detection seed oil road flow information, and seed oil road flow information is sent to controller；
According to seed oil road flow information, controller judges that whether system total flow is at the first preset range
In；Judge that the flow on seed oil road accounts for system total flow ratio whether in the second preset range；
If system total flow is not in the first preset range, then controller is sent out to electricity proportional variable pump
Send control signal；
Electricity proportional variable pump is according to the control signal regulation system total flow received；
If the flow that there is seed oil road accounts for system total flow ratio not in the second preset range, then
The controller electric proportional throttle valve on seed oil road sends regulation signal；
Electricity proportional throttle valve is according to regulation Signal Regulation valve port opening, in order to press according to valve port opening
The flow on pro rate seed oil road.
In one embodiment, if system total flow is not in the first preset range, then controller
The step sending control signal to electricity proportional variable pump specifically includes:
Judgement system total flow is less than the first preset range, then controller is sent out to electricity proportional variable pump
Send the control signal of increase system total flow；
Judgement system total flow is higher than the first preset range, then controller is sent out to electricity proportional variable pump
Send the control signal of reduction system total flow；
If the flow that there is seed oil road accounts for system total flow ratio not in the second preset range, then
The controller electric proportional throttle valve on seed oil road sends the step of regulation signal and 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 control
The device electric proportional throttle valve on seed oil road sends the regulation signal 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 control
The device electric proportional throttle valve on seed oil road sends the regulation signal reducing valve port opening.
In one embodiment, sensor is to be arranged between electricity proportional throttle valve and executor
Flow transducer on seed oil road, the flow value on detection seed oil road, and it is sent to controller；
Controller is according to seed oil road flow information, it is judged that whether system total flow is at the first predetermined model
In enclosing；Judge that the flow on seed oil road accounts for system total flow ratio whether in the second preset range
Step particularly as follows:
Controller, according to seed oil road flow information, obtains the movement velocity of executor, it is judged that system
Whether total flow is in the first preset range joined with actuator motions velocity correlation；Judge seed oil
The flow on road accounts for system total flow ratio whether in the second preset range.
In one embodiment, sensor is the motion-sensing being arranged in seed oil road on executor
Device, one or more in the detection displacement of executor, speed, angular displacement or angular velocity, and
It is sent to controller；
Controller is according to seed oil road flow information, it is judged that whether system total flow is at the first predetermined model
In enclosing；Judge that the flow on seed oil road accounts for system total flow ratio whether in the second preset range
Step particularly as follows:
Controller is according in the displacement of executor, speed, angular displacement or the angular velocity received
Individual or multiple obtain seed oil road flow information, it is judged that whether system total flow is at the first preset range
In；Judge that the flow on seed oil road accounts for system total flow ratio whether in the second preset range.
In one embodiment, the electromagnetic switch on seed oil road of the controller in above-described embodiment
After the direction of motion of valve regulation executor, judge, concurrently according to seed oil road flow information
Send control signal or regulation signal.
According to an aspect of the invention, it is provided a kind of electricity proportional flow distribution system, including:
Controller, for regulating the electric proportional variable pump of system total flow, for regulon oil circuit flow
Electric proportional throttle valve and for detecting the sensor of seed oil road flow information, wherein:
In each seed oil road, one end of electricity proportional throttle valve is connected to electricity proportional variable pump, separately
One end is connected to executor；Electricity proportional variable pump, electricity proportional throttle valve and sensor are electrically connected respectively
It is connected to controller；
Controller is adapted to be and does not exists when obtaining system total flow according to the flow information on seed oil road
Time in first preset range, trigger electricity proportional variable pump regulation system total flow；When according to seed oil
Road flow information obtains the flow on seed oil road and accounts for system total flow ratio not at the second preset range
Electric proportional throttle valve regulation valve port opening time interior, on triggers oil circuit.
In one embodiment, sensor is to be arranged between electricity proportional throttle valve and executor
Flow transducer on seed oil road, the flow value on detection seed oil road.
In one embodiment, sensor is the motion-sensing being arranged in seed oil road on executor
Device, one or more in the detection displacement of executor, speed, angular displacement or angular velocity.
In one embodiment, the system in above-described embodiment also includes transporting for adjusting actuator
The solenoid directional control valve in dynamic direction, solenoid directional control valve is arranged between electricity proportional throttle valve and executor
Seed oil road on.
In one embodiment, controller is adapted to be when obtaining according to the flow information on seed oil road
When system total flow is less than the first preset range, triggers electricity proportional variable pump increase system and always flow
Amount；When system total flow is higher than the first preset range, triggers electricity proportional variable pump and reduce system
Total flow；It is further adapted to ought obtain seed oil road flow according to the flow information on seed oil road and accounts for system
When total flow ratio is less than the second preset range, the electric proportional throttle valve on triggers oil circuit increases
Valve port opening；When group oil circuit flow accounts for system total flow ratio higher than the second preset range, touch
Generate the electric proportional throttle valve on seed oil road and reduce valve port opening.
The electric proportional flow distribution method of the present invention and system, it is possible to realize multichannel flow and load
Independently by demand pro rate, precision is high, response is fast.
Additionally, the present invention can also flow saturation resistance, system total flow can on-demand be automatically adjusted,
Simple and practical, modularity, is flexibly met user's request.
Accompanying drawing explanation
For the technical scheme being illustrated more clearly that in the embodiment of the present invention, below will to embodiment or
In description, the required accompanying drawing used is briefly described, it should be apparent that, attached in describing below
Figure is only some embodiments of the present invention, for those of ordinary skill in the art, is not paying
On the premise of going out creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the schematic diagram of one embodiment of flow distributing system in prior art
Fig. 2 is the schematic diagram of electricity one embodiment of proportional flow distribution method of the present invention.
Fig. 3 is the schematic diagram of electricity one embodiment of proportional flow distribution system of the present invention.
Fig. 4 is the schematic diagram of electricity proportional flow another embodiment of distribution system of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, to the technical scheme in the embodiment of the present invention
It is clearly and completely described, it is clear that described embodiment is only that a part of the present invention is real
Execute example rather than whole embodiments.Description at least one exemplary embodiment is real below
It is merely illustrative on border, never as to the present invention and application thereof or any limit of use
System.Based on the embodiment in the present invention, those of ordinary skill in the art are not making creative labor
The every other embodiment obtained under dynamic premise, broadly falls into the scope of protection of the invention.
Unless specifically stated otherwise, the parts illustrated the most in these embodiments and the phase of step
Layout, numerical expression and numerical value are not limited the scope of the invention.
Fig. 2 is the schematic diagram of electricity one embodiment of proportional flow distribution method of the present invention, it is preferred that
The method step of the present embodiment can be performed 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, executor can be hydraulic jack, it is also possible to be the devices such as hydraulic motor.
Step 202, according to seed oil road flow information, controller judges that whether system total flow is
In one preset range；Judge that the flow on seed oil road accounts for whether system total flow ratio makes a reservation for second
In the range of.If judging, system total flow not in the first preset range, then enters step 203；
If judging to exist the flow on seed oil road to account for system total flow ratio not in the second preset range, then
Enter step 205.If judge system total flow in the first preset range, then controller not to
Electricity proportional variable pump sends control signal；If judging, seed oil road accounts for system total flow ratio second
In preset range, then controller continues to monitor this seed oil road flow information.
Step 203, controller sends control signal to electricity proportional variable pump.
Step 204, electricity proportional variable pump regulates system total flow according to the control signal received,
To meet the demand to system total flow, terminate process afterwards.
Step 205, the controller electric proportional throttle valve on seed oil road sends regulation signal.
Step 206, electricity proportional throttle valve is according to regulation Signal Regulation valve port opening, in order to according to
Valve port opening pro rata distributes the flow on this seed oil road.
A kind of electricity proportional flow distribution method of the present invention, it is possible to realize multichannel flow unrelated with load
Ground is by demand pro rate, and precision is high, response is fast.
Additionally, the present invention can also flow saturation resistance, system total flow can on-demand be automatically adjusted, letter
Single practical, modularity, is flexibly met user's request.
Preferably, the sensor in said method is flow transducer, is arranged at electricity proportional throttle valve
And on the seed oil road between respective actuators, the seed oil road flow information at detection executor place, and
It is sent to controller.Controller, according to the seed oil road flow information received, can obtain executor's
Movement velocity.Such as, when executor is hydraulic jack, the flow value of flow transducer detection is
Q, then speed V=Q/A of hydraulic jack, wherein, A is the active area of hydraulic jack oil suction chamber；
When executor is hydraulic motor, motor rotary speed W=Q/L, wherein, L is the row of hydraulic motor
Amount.
When sensor is flow transducer, in actual applications, usual multiple executors complete multiple
Conjunction action, needs to keep specific speed proportionate relationship, therefore, when completing composite move, performs
The seed oil road at device place is also required to keep specific proportionate relationship.Believe by detecting each seed oil road flow
Breath, can obtain each seed oil road flow value, and then controller may determine that whether system total flow exists
In first preset range, and the flow on the seed oil road at each executor place accounts for system total flow ratio
Whether example is in the second preset range.
When the total oil mass of system is less than the first preset range, the total oil mass of explanation system cannot meet execution
The action demand of device, now, controller sends the control of increase system total flow to electricity proportional variable pump
Signal processed, electricity proportional variable pump increases system total flow according to control signal；When the total oil mass of system is big
When the first preset range, illustrate that total oil mass has exceeded the action demand of executor, now, control
Device sends the control signal of reduction system total flow to electricity proportional variable pump, electricity proportional variable pump according to
Control signal reduces system total flow.Those skilled in the art by the present invention it will be appreciated that
First preset range is it may be that during the system total flow value that is associated with each executor's operation acts is
The numerical range of the heart, concrete scope can be set according to different use conditions and required precision.
When the flow on the seed oil road at some executor place accounts for system total flow ratio less than second
During preset range, illustrate this seed oil road flow less than set proportion, now, controller to
The electric proportional throttle valve on this seed oil road sends the regulation signal increasing valve port opening, electricity proportional throttle valve
Increase valve port opening according to regulation signal, increase the flow on this seed oil road；When this executor place
When the flow on seed oil road accounts for system total flow ratio more than the second preset range, controller is to this son
The electric proportional throttle valve of oil circuit send reduce valve port opening regulation signal, electricity proportional throttle valve according to
Regulation signal reduces valve port opening.
Preferably, in above-described embodiment, when the flow on the seed oil road at executor place, to account for system total
The electric proportional throttle valve opening on this seed oil road is the most maximum less than the second preset range for flow proportional,
When electricity proportional variable pump also cannot provide bigger oil mass, the electricity ratio on other seed oil roads can be reduced simultaneously
Example choke valve valve port opening, so that each seed oil road binders amount is maintained in predetermined proportion, with full
The action demand of foot executor.
Those skilled in the art by the present invention it will be appreciated that the second preset range it may be that
Centered by the seed oil road flow being associated with executor's operation acts accounts for the ratio value of system total flow
Numerical range, concrete scope can be set according to different use conditions and required precision.
The electric proportional flow distribution method of the present invention, uses closed loop control, it is possible to realize multichannel flow
With load independently by demand pro rate, simultaneously flow saturation resistance, system total flow can on-demand from
Dynamic regulation, when emergency case occur, certain executor is broken down, and seed oil road, place flow is unexpected
When increasing or reduce, controller can be instantly available the signal of sensor, sends control signal
Or regulation signal so that each seed oil road realize with load unrelated by demand pro rate flow.
Additionally, the present invention can also flow saturation resistance, system total flow can on-demand be automatically adjusted, letter
Single practical, modularity, is flexibly met user's request.
Preferably, the sensor in said method can also be motion sensor, is arranged at executor
On, the one or more values in the detection displacement of executor, speed, angular displacement or angular velocity.Control
Device processed can carry out Bit andits control or speed by the above-mentioned information that motion sensor sends to executor
Degree controls.Such as, when executor is hydraulic jack, motion sensor senses oil cylinder inner piston rod
Displacement or speed；When executor is hydraulic motor, motion sensor senses motor output shaft
Angle or angular velocity.
As a example by executor is as hydraulic jack, each executor operationally, need multi-cylinder synchronous, etc.
Ratio carries out action.At this moment, the displacement state of each executor of motion sensor senses be sent to control
Device processed.When controller judges system total flow less than the first predetermined value, electricity proportional variable pump is described
The system total flow provided is unsatisfactory for the demand of each executor's action, and now, controller is to electricity ratio
Variable pump sends the control signal of increase system total flow, and electricity proportional variable pump increases according to control signal
Big system total flow；When controller judges the system total flow of oil circuit higher than the first predetermined value, say
The system total flow that bright electricity proportional variable pump provides has exceeded the demand of each executor's action, now,
Controller sends the control signal of reduction system total flow, electricity proportional variable pump to electricity proportional variable pump
System total flow is reduced according to control signal.
By needs control each hydraulic cylinder displacement equal as a example by, when certain executor goes wrong, example
When reducing suddenly such as displacement, controller judges its place seed oil according to the data that motion sensor sends
The flow on road accounts for system total flow ratio less than the second predetermined value, the electricity ratio on this seed oil road
Example choke valve sends the regulation signal increasing valve port opening, in order to increases the flow on this seed oil road, makes
The displacement of this executor and other executor's holding position phase shifts etc..When executor's displacement increases suddenly
Time, according to the data that motion sensor sends, controller judges that the flow on its seed oil road, place accounts for and is
System total flow ratio is higher than the second predetermined value, and the electric proportional throttle valve to this seed oil road sends and subtracts
The regulation signal of little valve port opening, in order to reduce the flow on this seed oil road, makes the displacement of this executor
With other executor's holding position phase shifts etc..
Preferably, in above-described embodiment, when the flow on certain seed oil road accounts for system total flow ratio
Less than the second preset range, the electric proportional throttle valve opening on this seed oil road is the most maximum, and electricity ratio becomes
When amount pump also cannot provide bigger oil mass, the electric proportional throttle valve on other seed oil roads can be reduced simultaneously
Valve port opening, so that each seed oil road flow is maintained in predetermined proportion, to meet executor
Action demand.
Preferably, above-described embodiment is additionally included in the direction of motion of solenoid directional control valve adjusting actuator
After, controller continues to judge according to each seed oil road flow information, and sends corresponding control
Signal or regulation signal.
Those skilled in the art are it will be appreciated that the triggering of control signal and regulation signal is permissible
Being to carry out, it is also possible to carry out time different, i.e. electricity proportional variable pump and electricity proportional throttle valve can simultaneously
To regulate simultaneously, coordinate realize with load unrelated by demand pro rate flow；Can also root
According to practical situation, only regulation electricity proportional variable pump or electricity proportional throttle valve realize with load unrelated
By demand pro rate flow.
The electric proportional flow distribution method of the present invention, uses closed loop control, it is possible to realize many ways
Oil circuit flow is with load independently by demand pro rate, simultaneously flow saturation resistance, and system always flows
Amount can on-demand be automatically adjusted, and when emergency case occur, certain executor is broken down, place
When oil circuit flow increases suddenly or reduces, controller can be instantly available the signal of sensor, touches
Send control signal or regulation signal so that each seed oil road realize with load unrelated by demand
Pro rate flow.
Additionally, the present invention can also flow saturation resistance, system total flow can on-demand be automatically adjusted,
Simple and practical, modularity, is flexibly met user's request.
Fig. 3 is the schematic diagram of an embodiment of electricity proportional flow distribution system of the present invention, such as figure
Shown in 3, including controller 304, for regulate system total flow electric proportional variable pump 301,
For the electric proportional throttle valve 302i of regulon oil circuit flow be used for detecting seed oil road flow information
Sensor 303i, wherein assume have N number of executor 305, each executor uses executor 305i
Represent, wherein 1≤i≤N.
In each seed oil road, one end of electricity proportional throttle valve 302i is connected to electricity rate variable
Pump 301, the other end is connected to executor 305i, electricity proportional variable pump 301, electricity ratio throttling
Valve 302i and sensor 303i is respectively electrically connected to controller 304, and in figure, solid line is that oil circuit connects
Connecing, dotted line is control signal.
Controller 304 is adapted to be when obtaining system total flow not according to the flow information on seed oil road
Time in the first preset range, trigger electricity proportional variable pump 301 and regulate system total flow；Work as root
Obtain the flow on seed oil road according to seed oil road flow information to account for system total flow ratio and do not make a reservation for second
In the range of time, electric proportional throttle valve 302i on triggers oil circuit regulates valve port opening.If controlling
Device 304 judge system total flow in the first preset range, then controller 304 not to electricity ratio
Variable pump 301 sends control signal；If controller 304 judges the seed oil at executor 305i place
The flow on road accounts for system total flow ratio in the second preset range, then continue to monitor this seed oil road
Flow information.
A kind of electricity proportional flow distribution system of the present invention, it is possible to realize multichannel flow and load nothing
Closing ground and press demand pro rate, precision is high, response is fast.
Additionally, the present invention can also flow saturation resistance, system total flow can on-demand be automatically adjusted,
Simple and practical, modularity, is flexibly met user's request.
Preferably, the sensor 303 in above-described embodiment is flow transducer, is arranged at electricity ratio
On seed oil road between example choke valve 302 and respective actuators 305, detect executor 305
The flow value on the seed oil road at place, and it is sent to controller 304.Controller 304 is according to reception
Flow value, the movement velocity of executor 305 can be obtained.Such as, as executor 305
During for hydraulic jack, the flow value of flow transducer 303 detection is Q, then hydraulic jack
Speed V=Q/A, wherein, A is the active area of hydraulic jack oil suction chamber；As executor 305
During for hydraulic motor, motor rotary speed W=Q/L, wherein, L is the discharge capacity of hydraulic motor.In reality
In the application of border, it usually needs multiple executor 305 cooperating operation execution.Each executor
305i can be hydraulic jack, it is also possible to be the hydraulic component of other forms such as hydraulic motor.Complete
When becoming composite move, the seed oil road binders amount at executor 305i place needs with the flow of other oil circuits
Keep specific proportionate relationship.By detecting each seed oil road flow information, each executor can be obtained
The running status of 305i, and then controller 304 may determine that whether system total flow makes a reservation for first
In the range of, and the flow on the seed oil road at executor 305i place accounts for system total flow ratio and exists
In corresponding second preset range.
When system total flow is less than the first preset range, the system total flow of explanation cannot meet execution
The action demand of device 305i, now, controller 304 sends increase to electricity proportional variable pump 301
The control signal of system total flow, electricity proportional variable pump 301 increases system according to control signal and always flows
Amount；When system total flow is more than the first preset range, the system total flow of explanation has exceeded executor
The action demand of 305, now, controller 304 sends reduction system to electricity proportional variable pump 301
The control signal of total flow, electricity proportional variable pump 301 reduces system total flow according to control signal.
Those skilled in the art by the present invention it will be appreciated that the first preset range it may be that with respectively
Numerical range centered by the system total flow value that executor's operation acts is associated, concrete scope can
It is set according to different use conditions and required precision.
It is less than when the flow on the seed oil road at some executor 305i place accounts for system total flow ratio
During corresponding second preset range, illustrate this seed oil road flow less than set proportion, now,
Controller 304 sends the regulation signal increasing valve port opening, electricity ratio to electricity proportional throttle valve 302i
Example choke valve 302i increases valve port opening according to regulation signal, increases executor 305i place seed oil
The flow on road；When the flow on the seed oil road at this executor 305i place, to account for system total flow ratio big
When corresponding second preset range, controller 304 is to the electric proportional throttle valve 302i on this seed oil road
Sending the regulation signal reducing valve port opening, electricity proportional throttle valve 302i reduces according to regulation signal
Valve port opening.
Those skilled in the art by the present invention it will be appreciated that the second preset range it may be that
The seed oil road flow being associated with executor's 305i operation acts accounts for the ratio value of system total flow
The numerical range at center, concrete scope can set according to different use conditions and required precision
Fixed.
Preferably, in above-described embodiment, when the flow on the seed oil road at executor 305i place accounts for it is
System total flow ratio is the electric proportional throttle valve 302i opening on this seed oil road less than the second preset range
Maximum, when electricity proportional variable pump 301 also cannot provide bigger oil mass, can be reduced it simultaneously
The electric proportional throttle valve valve port opening of his oil circuit, so that each seed oil road binders amount is maintained at predetermined ratio
In the range of, to meet the action demand of executor.
Preferably, as it is shown on figure 3, above-described embodiment also includes be arranged at executor 305i place
Seed oil road, for the solenoid directional control valve 306i of the direction of motion of adjusting actuator 305i, such as two
Position and four-way reversing valve.
In one embodiment, solenoid directional control valve 306i switching can be controlled by controller 304
Oil circuit direction in oil circuit, in order to the direction of motion of adjusting actuator 305i.At solenoid directional control valve 306i
After the direction of motion of adjusting actuator 305i, controller 304 continues according to the seed oil road stream received
Amount information judges, and sends corresponding control signal or regulation signal.
The electric proportional flow distribution system of the present invention, uses closed loop control, it is possible to realize many ways
Oil circuit flow is with load independently by demand pro rate, simultaneously flow saturation resistance, and system always flows
Amount can on-demand be automatically adjusted, and when emergency case occur, certain executor is broken down, place
When oil circuit flow increases suddenly or reduces, controller can be instantly available the signal of sensor, touches
Send control signal or regulation signal so that each seed oil road realize with load unrelated by demand
Pro rate flow.
Additionally, the present invention can also flow saturation resistance, system total flow can on-demand be automatically adjusted,
Simple and practical, modularity, is flexibly met user's request.
Fig. 4 is the schematic diagram of electricity proportional flow another embodiment of distribution system of the present invention.Such as figure
Shown in 4, including electricity proportional variable pump 401, electricity proportional throttle valve 402, sensor 403 and
Controller 404, electricity proportional variable pump 401 is connected to executor through electricity proportional throttle valve 402
405, in figure, solid line is that oil circuit connects, and dotted line is control signal, wherein, and electricity proportional variable pump
401, electricity proportional throttle valve 402 and controller 404 and electricity proportional variable pump 301 in Fig. 3,
Electricity proportional throttle valve 302 and controller 304 are same or like, and sensor 403 is motion-sensing
Device, is arranged on executor 405, detection the displacement of executor 405, speed, angular displacement or
One or more values in angular velocity.Controller 404 can be sent by motion sensor 403i
Above-mentioned information executor 405i is carried out Bit andits control or speed controlling, such as need to realize
Each executor's displacement is equal or displacement difference is equal.
Such as, when executor 405i is hydraulic jack, motion sensor 403i detects oil cylinder
The displacement of inner piston rod or speed；When executor 405i is hydraulic motor, motion-sensing
The angle of device 403i detection motor output shaft or angular velocity.
As a example by executor 405i is as hydraulic jack, each executor operationally, needs multi-cylinder same
Step, equal proportion carry out action.At this moment, the displacement of motion sensor 403i detection executor 405i
State, and it is sent to controller 404, when controller 404 is according to the displacement of each executor received
State, obtains the flow information on each seed oil road, it is judged that when system total flow is less than the first predetermined value,
Illustrate that the system total flow that electricity proportional variable pump 401 provides is unsatisfactory for the demand of each executor's action,
Now, controller 404 sends the control signal of increase system total flow to electricity proportional variable pump 401,
Electricity proportional variable pump 401 increases system total flow according to control signal；When controller 404 judges system
When system total flow is higher than the first predetermined value, the system total flow that electricity proportional variable pump 401 provides is described
Having exceeded the demand of each executor's 405i action, now, controller 404 is to electricity proportional variable pump
401 control signals sending reduction system total flow, electricity proportional variable pump 401 is according to control signal
Reduction system total flow.
By needs control each hydraulic cylinder displacement equal as a example by, when executor 405i goes wrong,
Such as when displacement reduces suddenly, the data that controller 404 sends according to motion sensor 403i obtain
To its seed oil road, place flow information, it is judged that the flow on its seed oil road, place accounts for system total flow ratio
Example is less than the second predetermined value, then send the tune increasing valve port opening to electricity proportional throttle valve 402i
Joint signal, in order to increase the flow on this seed oil road, makes the displacement of executor 405i perform with other
Device holding position phase shift etc..When displacement increases suddenly, controller is sent out according to motion sensor 403i
The data sent judge that the flow on its seed oil road accounts for system total flow ratio and is higher than the second predetermined value,
Then send the regulation signal reducing valve port opening to electricity proportional throttle valve 402i, in order to reduce this son
The flow of oil circuit, makes displacement and other executor's holding position phase shifts etc. of executor 405i.
Preferably, in above-described embodiment, when the flow on the seed oil road at executor 405i place accounts for it is
The electric proportional throttle valve 402i opening of system total flow ratio the second preset range and this oil circuit is
Greatly, when electricity proportional variable pump 401 also cannot provide bigger oil mass, other seed oils can be reduced simultaneously
The electric proportional throttle valve valve port opening on road, so that each seed oil road flow is maintained at predetermined proportion
In, and then meet the action demand of executor.
Those skilled in the art by the present invention it will be appreciated that the second preset range it may be that
The seed oil road flow first associated with executor's 405i operation acts accounts for the ratio value of system total flow
The numerical range at center, concrete scope can set according to different use conditions and required precision
Fixed.
Preferably, as shown in Figure 4, above-described embodiment also includes be arranged at executor 405i place
On seed oil road, 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, solenoid directional control valve 406i switching can be controlled by controller 404
The direction of oil circuit, in order to the direction of motion of adjusting actuator 405i.At solenoid directional control valve 406i
After the direction of motion of adjusting actuator 405i, controller 404 continues according to the executor received
The seed oil road flow information at 405i place judges, and sends corresponding control signal or regulation signal.
Those skilled in the art are it will be appreciated that the triggering of control signal and regulation signal is permissible
Being to carry out, it is also possible to carry out time different, i.e. electricity proportional variable pump and electricity proportional throttle valve can simultaneously
To regulate simultaneously, coordinate realize with load unrelated by demand pro rate flow, it is also possible to root
According to practical situation, only regulation electricity proportional variable pump or electricity proportional throttle valve realize with load unrelated
By demand pro rate flow.
The electric proportional flow distribution system of the present invention, uses closed loop control, it is possible to realize multi-way stream
Amount is with load independently by demand pro rate, simultaneously flow saturation resistance, and system total flow can be pressed
Need to be automatically adjusted, when emergency case occur, certain executor oil circuit oil mass that breaks down increases suddenly
Big or when reducing, controller can be instantly available the signal of sensor, sends control signal
Or regulation signal so that each oil circuit realize with load unrelated by demand pro rate flow.
Additionally, the present invention can also flow saturation resistance, system total flow can on-demand be automatically adjusted,
Simple and practical, modularity, is flexibly met user's request.
Below in conjunction with Fig. 2 and Fig. 3, electric proportional flow distribution method and the system of the present invention are carried out
Exemplary illustration.
The action of each executor 305i can be divided into action simultaneously and intermitten.
Action phase simultaneously, original state, electricity proportional variable pump 301 discharge capacity is maximum, electricity ratio joint
Stream valve 302i valve port is opened to maximum, regulates solenoid directional control valve according to the direction of action of executor 305i
The valve position of 306i.If controller 304 judges that system total flow cannot meet the action demand of executor,
I.e. less than the first preset range, then controller 304 sends control signal to electricity proportional variable pump, makes
Electricity proportional variable pump 301 increases discharge capacity；If higher than the first preset range, then reducing discharge capacity.Flow
Sensor 303i detects the seed oil road flow information at executor 305i place and is sent to controller
304, controller 304 judges the seed oil road at executor 305i place according to seed oil road flow information
Flow accounts for system total flow ratio whether in the second preset range, if less than the second preset range,
The regulation signal increasing valve port opening is then sent to electricity proportional throttle valve 302i；If it is pre-higher than second
Determine scope, then send the regulation signal reducing valve port opening to electricity proportional throttle valve 302i.
In the intermitten stage, in this stage, some executor is already without wanting action or action extremely
End of travel.At this moment, the electric ratio joint on the seed oil road, executor 305i place that action is complete
Stream valve 302i closes.Controller 304 sends reduction system total flow to electricity proportional variable pump 301
Control signal, it is ensured that the speed requirement of the executor that other actions are not fully complete.As executor 305i
From stopping action becoming work time, controller 304 to electricity proportional variable pump 301 send increase system
The control signal of total flow, sends to electricity proportional throttle valve 302i and increases the regulation letter of valve port opening
Number, so that the flow on each seed oil road meets required proportionate relationship.Preferably, root gone back by controller 304
According to the practical situation on each seed oil road, send regulation signal to other executors, so that each seed oil road to be flowed
The ratio of amount is adjusted.
A kind of electricity proportional flow distribution method of the present invention, it is possible to realize multichannel flow unrelated with load
Ground is by demand pro rate, and precision is high, response is fast.
Additionally, the present invention can also flow saturation resistance, system total flow can on-demand be automatically adjusted, letter
Single practical, modularity, is flexibly met user's request.
One of ordinary skill in the art will appreciate that all or part of step realizing above-described embodiment
Can be completed by hardware, it is also possible to instruct relevant hardware by program and complete, described
Program can be stored in a kind of computer-readable recording medium, and storage medium mentioned above is permissible
It is read only memory, disk or CD etc..
Description of the invention is given for the sake of example and description, and is not exhaustively
Or it limit the invention to disclosed form.Many modifications and variations are for the common skill of this area
It is obvious for art personnel.Selecting and describing embodiment is the principle in order to the present invention is more preferably described
Apply with reality, and make those of ordinary skill in the art it will be appreciated that the present invention thus design is suitable
The various embodiments with various amendments in special-purpose.
Claims (10)
1. an electric proportional flow distribution method, it is characterised in that including:
Sensor detection seed oil road flow information, and seed oil road flow information is sent to controller；
According to seed oil road flow information, controller judges that whether system total flow is at the first preset range
In；Judge that the flow on seed oil road accounts for system total flow ratio whether in the second preset range；
If system total flow is not in the first preset range, then controller is sent out to electricity proportional variable pump
Send control signal；
Electricity proportional variable pump is according to the control signal regulation system total flow received；
If the flow that there is seed oil road accounts for system total flow ratio not in the second preset range, then
The controller electric proportional throttle valve on seed oil road sends regulation signal；
Electricity proportional throttle valve is according to regulation Signal Regulation valve port opening, in order to press according to valve port opening
The flow on pro rate seed oil road.
Method the most according to claim 1, it is characterised in that sensor is for being arranged at electricity
The flow transducer on seed oil road between proportional throttle valve and executor, the stream on detection seed oil road
Value, and it is sent to controller；
Controller is according to seed oil road flow information, it is judged that whether system total flow is at the first predetermined model
In enclosing；Judge that the flow on seed oil road accounts for system total flow ratio whether in the second preset range
Step particularly as follows:
Controller, according to seed oil road flow information, obtains the movement velocity of executor, it is judged that system
Whether total flow is in the first preset range joined with actuator motions velocity correlation；Judge seed oil
The flow on road accounts for system total flow ratio whether in the second preset range.
Method the most according to claim 1, it is characterised in that sensor is for being arranged at son
Motion sensor on executor in oil circuit, detection the displacement of executor, speed, angular displacement or
One or more in angular velocity, and it is sent to controller；
Controller is according to seed oil road flow information, it is judged that whether system total flow is at the first predetermined model
In enclosing；Judge that the flow on seed oil road accounts for system total flow ratio whether in the second preset range
Step particularly as follows:
Controller is according in the displacement of executor, speed, angular displacement or the angular velocity received
Individual or multiple obtain seed oil road flow information, it is judged that whether system total flow is at the first preset range
In；Judge that the flow on seed oil road accounts for system total flow ratio whether in the second preset range.
4. according to the arbitrary described method of claim 1-3, it is characterised in that also include:
After the direction of motion of controller solenoid directional control valve adjusting actuator on seed oil road, root
Judge according to seed oil road flow information, and send control signal or regulation signal.
Method the most according to claim 4, it is characterised in that if system total flow does not exists
In first preset range, then the step that controller sends control signal to electricity proportional variable pump is concrete
Including:
Judgement system total flow is less than the first preset range, then controller is sent out to electricity proportional variable pump
Send the control signal of increase system total flow；
Judgement system total flow is higher than the first preset range, then controller is sent out to electricity proportional variable pump
Send the control signal of reduction system total flow；
If the flow that there is seed oil road accounts for system total flow ratio not in the second preset range, then
The controller electric proportional throttle valve on seed oil road sends the step of regulation signal and 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 control
The device electric proportional throttle valve on seed oil road sends the regulation signal 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 control
The device electric proportional throttle valve on seed oil road sends the regulation signal reducing valve port opening.
6. an electric proportional flow distribution system, it is characterised in that including: controller, be used for
The electric proportional variable pump of regulation system total flow, electric ratio for regulon oil circuit flow throttle
Valve and for detecting the sensor of seed oil road flow information, wherein:
In each seed oil road, one end of electricity proportional throttle valve is connected to electricity proportional variable pump, separately
One end is connected to executor；Electricity proportional variable pump, electricity proportional throttle valve and sensor are electrically connected respectively
It is connected to controller；
Controller is adapted to be when obtaining system total flow not the according to the flow information on seed oil road
Time in one preset range, trigger electricity proportional variable pump regulation system total flow；When according to seed oil road
Flow information obtains the flow on seed oil road and accounts for system total flow ratio not in the second preset range
Time, the electric proportional throttle valve regulation valve port opening on triggers oil circuit.
System the most according to claim 6, it is characterised in that sensor is for being arranged at electricity ratio
The flow transducer on seed oil road between choke valve and executor, the flow value on detection seed oil road.
System the most according to claim 6, it is characterised in that sensor is for being arranged at seed oil road
Motion sensor on middle executor, the detection displacement of executor, speed, angular displacement or angle speed
One or more in degree.
9. according to the system that claim 6-8 is arbitrary, it is characterised in that also include for regulating
The solenoid directional control valve in actuator motions direction, solenoid directional control valve is arranged at electricity proportional throttle valve and holds
On seed oil road between row device.
System the most according to claim 9, it is characterised in that
Controller is adapted to be when obtaining system total flow less than the according to the flow information on seed oil road
During one preset range, trigger electricity proportional variable pump and increase system total flow；When system total flow is high
When the first preset range, trigger electricity proportional variable pump and reduce system total flow；It is further adapted to
System total flow ratio is accounted for less than second when obtaining seed oil road flow according to the flow information on seed oil road
During preset range, the electric proportional throttle valve on triggers oil circuit increases valve port opening；Group oil circuit
When flow accounts for system total flow ratio higher than the second preset range, the electric ratio on triggers oil circuit
Choke valve reduces valve port opening.
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| CN107191423A (en) * | 2017-05-19 | 2017-09-22 | 徐州工业职业技术学院 | A kind of hydraulic synchronization control loop |
| 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 |
| 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 |
| CN110502041A (en) * | 2019-07-22 | 2019-11-26 | 北京控制工程研究所 | A kind of miniflow amount 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 |
| CN113550374A (en) * | 2021-06-30 | 2021-10-26 | 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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| CN113550374A (en) * | 2021-06-30 | 2021-10-26 | 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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