CN205001273U - Electric proportional flow distribution system - Google Patents
Electric proportional flow distribution system Download PDFInfo
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- CN205001273U CN205001273U CN201520437984.XU CN201520437984U CN205001273U CN 205001273 U CN205001273 U CN 205001273U CN 201520437984 U CN201520437984 U CN 201520437984U CN 205001273 U CN205001273 U CN 205001273U
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Abstract
The utility model discloses an electric proportional flow distribution system, include: the controller, be used for the governing system total flow electric proportional variable pump, be used for the electric proportional choke valve of moderator oil circuit flow and be used for detecting the sensor of seed oil way flow information, wherein: in every seed oil way, the one end of electric proportional variable valve is connected to electric proportional variable pump, and the other end is connected to the executor, electric proportional variable pump, electric proportional choke valve and sensor electricity respectively are connected to the controller, the controller not in first preset range the time, is triggered electric proportional variable pump governing system total flow for the flow information when according to the seed oil way obtains system's total flow by the adaptation, it not in the second preset range time, triggers seed oil electric proportional baffling valve port aperture on the road to account for system's total flow proportion when the flow that obtains the seed oil way according to seed oil way flow information. The utility model discloses can realize with the load irrelevant according to the distribution of demand proportinal flow, and system's total flow automatically regulated as required.
Description
Technical field
The utility model relates to engineering machinery field, particularly relates to a kind of electric proportional flow distribution system.
Background technique
Multi-actuator Hydraulic System is widely used in the field such as engineering machinery, industrial automation.Usually be divided into multiple seed oil road to realize the composite move of multi executors by single pump working connection, this just needs to carry out reasonable distribution to flow system flow.And the load that each final controlling element bears is uneven often, flow trends towards little load oil circuit, this just causes little load oil circuit flow bigger than normal, heavy load oil circuit flow is less than normal, cannot distribute according to need flow, especially when undercurrent amount, (flow that oil hydraulic pump provides cannot meet final controlling element requirement) the problems referred to above more highlight.So the assignment of traffic had nothing to do with load, anti-current amount saturated be the key index of assignment of traffic.Flow distribution device in existing market presents diversity in form, and performance is short of to some extent, and cost is higher.
In prior art, multichannel flow distributing system mainly comprises traditional type, equal proportion formula and control with changed scale formula.Wherein, traditional type system each road flow, by load effect, cannot realize the distribution according to need irrelevant with load; Although equal proportion formula can realize seed oil road flow and load has nothing to do, can only distribute according to fixed proportion, cannot freely distribute as required, and precision be not high; The schematic diagram of control with changed scale formula as shown in Figure 1, generally include variable displacement pump 101, variable piston 102, variable throttle valve 103, pressure-compensated valve 104 and shuttle valve 105, each road highest load pressure is selected by shuttle valve 105, feed back to variable piston 102 and then drive variable displacement pump 101 Displacement Regulation, to meet the traffic requirement of final controlling element 106, and this mode realizes in the mode of hydraulic control, Flow-rate adjustment is delayed, and assignment of traffic is opened loop control, in addition the impact such as machining accuracy, wearing and tearing, precision is lower, complex structure, cost are higher.
Therefore, need a kind of can realize irrelevant by demand pro rate flow, highi degree of accuracy, rapid-action flow distributing system with load, to meet higher work, Production requirement.
Model utility content
The utility model provides a kind of electric proportional flow distribution system, and can realize multichannel flow and load independently by demand pro rate, precision is high, response is fast.
According to an aspect of the present utility model, provide a kind of electric proportional flow distribution system, comprise: controller, for the electric proportional variable pump of regulating system total discharge, for regulating the electric proportional throttle valve of seed oil road flow and the sensor for detecting seed oil road flow information, 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 final controlling element; Electricity proportional variable pump, electric proportional throttle valve and sensor are electrically connected to controller respectively;
Controller be adapted to be when obtain according to the flow information on seed oil road system total discharge not in the first prespecified range time, trigger electric proportional variable pump regulating system total discharge; When the flow obtaining seed oil road according to seed oil road flow information account for system total discharge ratio not in the second prespecified range time, the electric proportional throttle valve on triggers oil circuit regulates valve port opening.
In one embodiment, sensor is be arranged at the flow transducer on the seed oil road between electric proportional throttle valve and final controlling element, detects the flow value on seed oil road.
In one embodiment, sensor is be arranged at the Motion sensor in seed oil road on final controlling element, and that detects in the displacement of final controlling element, speed, angular displacement or angular velocity is one or more.
In one embodiment, the system in above-described embodiment also comprises the solenoid directional control valve for adjusting actuator moving direction, and solenoid directional control valve is arranged on the seed oil road between electric proportional throttle valve and final controlling element.
In one embodiment, controller is adapted to be when obtaining system total discharge lower than the first prespecified range according to the flow information on seed oil road, triggers electric proportional variable pump and increases system total discharge; When system total discharge is higher than the first prespecified range, triggers electric proportional variable pump and reduce system total discharge; Also be adapted to be when obtaining seed oil road flow according to the flow information on seed oil road and accounting for system total discharge ratio lower than the second prespecified range, the electric proportional throttle valve on triggers oil circuit increases valve port opening; When group oil circuit flow accounts for system total discharge ratio higher than the second prespecified range, the electric proportional throttle valve on triggers oil circuit reduces valve port opening.
Electric proportional flow distribution system of the present utility model, can realize multichannel flow and load independently by demand pro rate, precision is high, response is fast.
In addition, the utility model can also anti-current amount saturated, system total discharge can regulate as required automatically, and simple and practical, modularization, meets consumers' demand flexibly.
Accompanying drawing explanation
In order to be illustrated more clearly in the technological scheme in the utility model embodiment, be briefly described to the accompanying drawing of embodiment or required use in describing below, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the schematic diagram of a flow distributing system embodiment in prior art
Fig. 2 is the schematic diagram of the utility model electricity proportional flow distribution method embodiment.
Fig. 3 is the schematic diagram of the utility model electricity proportional flow distribution system embodiment.
Fig. 4 is the schematic diagram of another embodiment of the utility model electricity proportional flow distribution system.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technological scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Illustrative to the description only actually of at least one exemplary embodiment below, never as any restriction to the utility model and application or use.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Unless specifically stated otherwise, otherwise positioned opposite, the numerical expression of the parts of setting forth in these embodiments and step and numerical value do not limit scope of the present utility model.
Fig. 2 is the schematic diagram of an embodiment of distribution method during the utility model electricity proportional flow distributes, and preferably, the method step of the present embodiment can be performed by system of the present utility model, wherein:
Step 201, sensor detects seed oil road flow information, and seed oil road flow information is sent to controller.Wherein, final controlling element can be hydraulic jack, also can be the devices such as oil hydraulic motor.
Step 202, controller judges system total discharge whether in the first prespecified range according to seed oil road flow information; Judge that the flow on seed oil road accounts for system total discharge ratio whether in the second prespecified range.If judge system total discharge not in the first prespecified range, then enter step 203; If judge, the flow that there is seed oil road accounts for system total discharge ratio not in the second prespecified range, then enter step 205.If judge, system total discharge is in the first prespecified range, then controller does not transmit control signal to electric proportional variable pump; If judge, seed oil road accounts for system total discharge ratio in the second prespecified range, then controller continues this seed oil road flow information of monitoring.
Step 203, controller transmits control signal to electric proportional variable pump.
Step 204, electric proportional variable pump, according to the control signal regulating system total discharge received, to meet the demand to system total discharge, terminates process afterwards.
Step 205, controller sends regulated signal to the electric proportional throttle valve on seed oil road.
Step 206, electric proportional throttle valve regulates valve port opening according to regulated signal, to pro rata distribute the flow on this seed oil road according to valve port opening.
The electric proportional flow distribution system of one of the present utility model, can realize multichannel flow and load independently by demand pro rate, precision is high, response is fast.
In addition, the utility model can also anti-current amount saturated, system total discharge can regulate as required automatically, and simple and practical, modularization, meets consumers' demand flexibly.
Preferably, the sensor in said method is flow transducer, is arranged on the seed oil road between electric proportional throttle valve and respective actuators, detects the seed oil road flow information at final controlling element place, and sends to controller.Controller, according to the seed oil road flow information received, can obtain the movement velocity of final controlling element.Such as, when final controlling element is hydraulic jack, the flow value that flow transducer detects is Q, then the speed V=Q/A of hydraulic jack, and wherein, A is the active area of hydraulic jack oil suction chamber; When final controlling element is oil hydraulic motor, motor rotary speed W=Q/L, wherein, L is the discharge capacity of oil hydraulic motor.
When sensor is flow transducer, in actual applications, usual multiple final controlling element completes composite move, needs to keep specific speed proportionate relationship, and therefore, when completing composite move, the seed oil road at final controlling element place also needs to keep specific proportionate relationship.By detecting each seed oil road flow information, each seed oil road flow value can be obtained, and then controller can judge system total discharge whether in the first prespecified range, and the flow on the seed oil road at each final controlling element place accounts for system total discharge ratio whether in the second prespecified range.
When the total oil mass of system is less than the first prespecified range, the total oil mass of illustrative system cannot meet the action demand of final controlling element, now, controller sends the control signal of increase system total discharge to electric proportional variable pump, and electric proportional variable pump increases system total discharge according to control signal; When the total oil mass of system is greater than the first prespecified range, illustrate that total oil mass has exceeded the action demand of final controlling element, now, controller sends the control signal of reduction system total discharge to electric proportional variable pump, and electric proportional variable pump reduces system total discharge according to control signal.Those skilled in the art are scrutable by the utility model is, first prespecified range can be, number range centered by the system total discharge value be associated with each final controlling element operation acts, concrete scope can set according to different service conditions and required precision.
When the flow on the seed oil road at some final controlling element places account for system total discharge ratio be less than the second prespecified range time, illustrate that this seed oil road flow is less than the proportion of setting, now, controller sends to the electric proportional throttle valve on this seed oil road the regulated signal increasing valve port opening, electricity proportional throttle valve increases valve port opening according to regulated signal, increases the flow on this seed oil road; When the flow on the seed oil road at this final controlling element place account for system total discharge ratio be greater than the second prespecified range time, controller sends to the electric proportional throttle valve on this seed oil road the regulated signal reducing valve port opening, and electric proportional throttle valve reduces valve port opening according to regulated signal.
Preferably, in above-described embodiment, the second prespecified range is less than and the electric proportional throttle valve opening on this seed oil road is maximum when the flow on the seed oil road at final controlling element place accounts for system total discharge ratio, when electricity proportional variable pump also cannot provide larger oil mass, the electric proportional throttle valve valve port opening on other seed oil roads can be reduced simultaneously, to make each seed oil road binders amount remain in predetermined proportion, to meet the action demand of final controlling element.
Those skilled in the art are scrutable by the utility model is, second prespecified range can be, the seed oil road flow be associated with final controlling element operation acts accounts for the number range centered by the ratio value of system total discharge, and concrete scope can set according to different service conditions and required precision.
Electric proportional flow distribution system of the present utility model, adopt closed loop control, can realize multichannel flow and load independently by demand pro rate, the amount of anti-current is simultaneously saturated, and system total discharge can regulate as required automatically, when occurring emergency case, certain final controlling element breaks down, and when seed oil road, place flow increases suddenly or reduces, controller can obtain the signal of sensor immediately, triggering sends control signal or regulated signal, irrelevant by demand pro rate flow with load to make each seed oil road realize.
In addition, the utility model can also anti-current amount saturated, system total discharge can regulate as required automatically, and simple and practical, modularization, meets consumers' demand flexibly.
Preferably, the sensor in said system can be also Motion sensor, is arranged on final controlling element, detects the one or more values in the displacement of final controlling element, speed, angular displacement or angular velocity.The above-mentioned information that controller can be sent by Motion sensor carries out Bit andits control or speeds control to final controlling element.Such as, when final controlling element is hydraulic jack, the displacement of motion sensor senses oil cylinder inner piston rod or speed; When final controlling element is oil hydraulic motor, the angle of motion sensor senses motor output shaft or angular velocity.
Take final controlling element as hydraulic jack be example, each final controlling element operationally, needs multi-cylinder synchronous, equal proportion to carry out action.At this moment, each final controlling element of motion sensor senses displacement state and send to controller.When controller judges system total discharge lower than the first predetermined value, illustrate that system total discharge that electric proportional variable pump provides does not meet the demand of each final controlling element action, now, controller sends the control signal of increase system total discharge to electric proportional variable pump, and electric proportional variable pump increases system total discharge according to control signal; When controller judges the system total discharge of oil circuit higher than the first predetermined value, illustrate that the system total discharge that electric proportional variable pump provides has exceeded the demand of each final controlling element action, now, controller sends the control signal of reduction system total discharge to electric proportional variable pump, and electric proportional variable pump reduces system total discharge according to control signal.
Each hydraulic cylinder displacement is controlled equal for needs, when certain final controlling element goes wrong, such as, when displacement reduces suddenly, according to the data that Motion sensor sends, controller judges that the flow on its seed oil road, place accounts for system total discharge ratio lower than the second predetermined value, the regulated signal increasing valve port opening is sent to the electric proportional throttle valve on this seed oil road, to increase the flow on this seed oil road, make the displacement and other final controlling element holding position phase shifts etc. of this final controlling element.When final controlling element displacement increases suddenly, according to the data that Motion sensor sends, controller judges that the flow on its seed oil road, place accounts for system total discharge ratio higher than the second predetermined value, electric proportional throttle valve to this seed oil road sends the regulated signal reducing valve port opening, to reduce the flow on this seed oil road, make the displacement and other final controlling element holding position phase shifts etc. of this final controlling element.
Preferably, in above-described embodiment, the second prespecified range is less than and the electric proportional throttle valve opening on this seed oil road is maximum when the flow on certain seed oil road accounts for system total discharge ratio, when electricity proportional variable pump also cannot provide larger oil mass, the electric proportional throttle valve valve port opening on other seed oil roads can be reduced simultaneously, to make each seed oil road flow remain in predetermined proportion, to meet the action demand of final controlling element.
Preferably, after being also included in the moving direction of solenoid directional control valve adjusting actuator in above-described embodiment, controller continues to judge according to each seed oil road flow information, and sends corresponding control signal or regulated signal.
Those skilled in the art are scrutable is, the triggering of control signal and regulated signal can be carry out simultaneously, also can not simultaneously carry out, namely electric proportional variable pump and electric proportional throttle valve can regulate simultaneously, and what coordinate realization and load to have nothing to do presses demand pro rate flow; Also can according to actual conditions, only regulate electric proportional variable pump or electric proportional throttle valve to realize irrelevant by demand pro rate flow with load.
Electric proportional flow distribution system of the present utility model, adopt closed loop control, multichannel seed oil road flow and load can be realized independently by demand pro rate, the amount of anti-current is simultaneously saturated, system total discharge can regulate as required automatically, when occurring emergency case, certain final controlling element breaks down, when seed oil road, place flow increases suddenly or reduces, controller can obtain the signal of sensor immediately, triggering sends control signal or regulated signal, irrelevant by demand pro rate flow with load to make each seed oil road realize.
In addition, the utility model can also anti-current amount saturated, system total discharge can regulate as required automatically, and simple and practical, modularization, meets consumers' demand flexibly.
Fig. 3 is the schematic diagram of an embodiment of the present invention's electricity proportional flow distribution system, as shown in Figure 3, comprise controller 304, for the electric proportional variable pump 301 of regulating system total discharge, for regulating the electric proportional throttle valve 302i of seed oil road flow and the sensor 303i for detecting seed oil road flow information, wherein hypothesis has N number of final controlling element 305, each final controlling element final controlling element 305i represents, wherein 1≤i≤N.
In each seed oil road, one end of electricity proportional throttle valve 302i is connected to electric proportional variable pump 301, the other end is connected to final controlling element 305i, electricity proportional variable pump 301, electric proportional throttle valve 302i and sensor 303i are electrically connected to controller 304 respectively, in figure, solid line is that oil circuit connects, and dotted line is control signal.
Controller 304 be adapted to be when obtain according to the flow information on seed oil road system total discharge not in the first prespecified range time, trigger electric proportional variable pump 301 regulating system total discharge; When the flow obtaining seed oil road according to seed oil road flow information account for system total discharge ratio not in the second prespecified range time, the electric proportional throttle valve 302i on triggers oil circuit regulates valve port opening.If controller 304 judges that system total discharge is in the first prespecified range, then controller 304 does not transmit control signal to electric proportional variable pump 301; If controller 304 judges that the flow on the seed oil road at final controlling element 305i place accounts for system total discharge ratio in the second prespecified range, then continue this seed oil road flow information of monitoring.
Concrete, controller 304 can adopt computing unit and logical circuit to realize.The electrical signal that such as computing unit sends according to each sensor 303i received, the flow obtaining seed oil road, final controlling element 305i place accounts for the ratio of system total discharge, and computing unit can adopt hardware implementing of the prior art.
In one embodiment, comparator is adopted the flow on the seed oil road, final controlling element 305i place obtained to be accounted for the ratio of system total discharge, compare with the upper and lower numerical value of corresponding second prespecified range respectively, comparative result is inputted demultplexer, judges whether to send regulated signal to electric proportional throttle valve 302i according to the Output rusults of demultplexer.
In another embodiment, concrete, the lower limit that the flow on seed oil road, final controlling element 305i place accounts for system total discharge ratio and the second corresponding prespecified range compares by the first comparator, if flow accounting is greater than the lower limit of the second prespecified range, then exports " 1 "; The CLV ceiling limit value that the flow on seed oil road, final controlling element 305i place accounts for system total discharge ratio and the second corresponding prespecified range compares by the second comparator, if flow accounting is greater than the CLV ceiling limit value of the second prespecified range, then exports " 1 ".The output value of the first and second comparators is accessed NOR gate, gate and AND circuit respectively, when NOR gate exports " 1 ", gate and when exporting " 0 " with door, illustrate that the flow on seed oil road, final controlling element 305i place accounts for system total discharge ratio and is less than the second prespecified range, then send the regulated signal increasing valve port opening to electric proportional throttle valve 302i; When gate exports " 1 ", NOR gate and when exporting " 0 " with door, illustrates that the flow on seed oil road, final controlling element 305i place accounts for system total discharge ratio in the second prespecified range, then the running state of final controlling element 305i is monitored in continuation; When exporting as " 1 " with door, when NOR gate and gate export as " 0 ", illustrating that the flow on seed oil road, final controlling element 305i place accounts for system total discharge ratio and is greater than the second prespecified range, then sending the regulated signal reducing valve port opening to electric proportional throttle valve 302i.
Similar, above-mentioned logical circuit can be adopted in controller 304, judge system total discharge whether in the first prespecified range.Such as first add up with the signal of adder to each final controlling element 305i oil circuit, the upper and lower numerical value of the system total discharge signal obtained and the first prespecified range compares by comparator, comparative result is inputted demultplexer, judges whether to transmit control signal to electric proportional variable pump 301 according to the Output rusults of demultplexer.
In another embodiment, concrete, the lower limit of system total discharge signal and the first prespecified range compares by the 3rd comparator, if system total discharge is greater than the lower limit of the first prespecified range, then exports " 1 "; The CLV ceiling limit value of system total discharge signal and the first prespecified range compares by the 4th comparator, if system total discharge is greater than the CLV ceiling limit value of the first prespecified range, then exports " 1 ".The output value of the third and fourth comparator is accessed NOR gate, gate and AND circuit respectively, when NOR gate exports " 1 ", gate and when exporting " 0 " with door, illustrative system total discharge is less than the first prespecified range, then send the control signal of increase system total discharge to electric proportional variable pump 301; When gate exports " 1 ", NOR gate and when exporting " 0 " with door, illustrative system total discharge in the first prespecified range, does not then transmit control signal to electric proportional variable pump 301; When exporting as " 1 " with door, when NOR gate and gate export as " 0 ", illustrative system total discharge is greater than the first prespecified range, then send the control signal of reduction system total discharge to electric proportional variable pump 301.
Preferably, controller 304 can also comprise timer, when electric proportional throttle valve 302i valve port opening is maximum, and the time that the ratio that the flow on seed oil road, final controlling element 305i place accounts for system total discharge continues to be less than the second prespecified range is when exceeding predetermined value, the electric proportional throttle valve 302j be then correlated with to other final controlling element 305j sends the regulated signal reducing valve port opening, returns in corresponding second prespecified range with the ratio of the seed oil road flow making each final controlling element place.
Those skilled in the art are scrutable by the utility model, and the logical circuit implementation of above-mentioned controller 304 is only exemplary, and other forms of logical circuit also can be adopted to realize controller 304.
The electric proportional flow distribution system of one of the present utility model, can realize multichannel flow and load independently by demand pro rate, precision is high, response is fast.
In addition, the utility model can also anti-current amount saturated, system total discharge can regulate as required automatically, and simple and practical, modularization, meets consumers' demand flexibly.
Preferably, the sensor 303 in above-described embodiment is flow transducer, is arranged on the seed oil road between electric proportional throttle valve 302 and respective actuators 305, detects the flow value on the seed oil road at final controlling element 305 place, and sends to controller 304.Controller 304, according to the flow value received, can obtain the movement velocity of final controlling element 305.Such as, when final controlling element 305 is hydraulic jack, the flow value that flow transducer 303 detects is Q, then the speed V=Q/A of hydraulic jack, and wherein, A is the active area of hydraulic jack oil suction chamber; When final controlling element 305 is oil hydraulic motor, motor rotary speed W=Q/L, wherein, L is the discharge capacity of oil hydraulic motor.In actual applications, usually the execution of multiple final controlling element 305 cooperating operation is needed.Each final controlling element 305i can be hydraulic jack, also can be the other forms of hydraulic components such as oil hydraulic motor.When completing composite move, the seed oil road binders amount at final controlling element 305i place and the flow of other oil circuits need to keep specific proportionate relationship.By detecting each seed oil road flow information, the running state of each final controlling element 305i can be obtained, and then controller 304 can judge system total discharge whether in the first prespecified range, and the flow on the seed oil road at final controlling element 305i place accounts for system total discharge ratio in corresponding second prespecified range.
When system total discharge is less than the first prespecified range, illustrative system total discharge cannot meet the action demand of final controlling element 305i, now, controller 304 sends the control signal of increase system total discharge to electric proportional variable pump 301, and electric proportional variable pump 301 increases system total discharge according to control signal; When system total discharge is greater than the first prespecified range, illustrative system total discharge has exceeded the action demand of final controlling element 305, now, controller 304 sends the control signal of reduction system total discharge to electric proportional variable pump 301, and electric proportional variable pump 301 reduces system total discharge according to control signal.Those skilled in the art are scrutable by the utility model is, first prespecified range can be, number range centered by the system total discharge value be associated with each final controlling element operation acts, concrete scope can set according to different service conditions and required precision.
When the flow on the seed oil road at some final controlling element 305i places account for system total discharge ratio be less than corresponding second prespecified range time, illustrate that this seed oil road flow is less than the proportion of setting, now, controller 304 sends the regulated signal increasing valve port opening to electric proportional throttle valve 302i, electricity proportional throttle valve 302i increases valve port opening according to regulated signal, increases the flow on seed oil road, final controlling element 305i place; When the flow on the seed oil road at this final controlling element 305i place account for system total discharge ratio be greater than corresponding second prespecified range time, controller 304 sends to the electric proportional throttle valve 302i on this seed oil road the regulated signal reducing valve port opening, and electric proportional throttle valve 302i reduces valve port opening according to regulated signal.
Those skilled in the art are scrutable by the utility model is, second prespecified range can be, the seed oil road flow be associated with final controlling element 305i operation acts accounts for the number range centered by the ratio value of system total discharge, and concrete scope can set according to different service conditions and required precision.
Preferably, in above-described embodiment, the second prespecified range is less than and the electric proportional throttle valve 302i opening on this seed oil road is maximum when the flow on the seed oil road at final controlling element 305i place accounts for system total discharge ratio, when electricity proportional variable pump 301 also cannot provide larger oil mass, the electric proportional throttle valve valve port opening of other oil circuits can be reduced simultaneously, to make each seed oil road binders amount remain in predetermined proportion, to meet the action demand of final controlling element.
Preferably, as shown in Figure 3, also comprise in above-described embodiment and be arranged at seed oil road, final controlling element 305i place, for the solenoid directional control valve 306i of the moving direction of adjusting actuator 305i, such as two-position four way change valve.
In one embodiment, solenoid directional control valve 306i can be controlled by controller 304 and switch oil circuit direction in seed oil road, so that the moving direction of adjusting actuator 305i.After the moving direction of solenoid directional control valve 306i adjusting actuator 305i, the seed oil road flow information that controller 304 continues according to receiving judges, and sends corresponding control signal or regulated signal.
Electric proportional flow distribution system of the present utility model, adopt closed loop control, multichannel seed oil road flow and load can be realized independently by demand pro rate, the amount of anti-current is simultaneously saturated, system total discharge can regulate as required automatically, when occurring emergency case, certain final controlling element breaks down, when seed oil road, place flow increases suddenly or reduces, controller can obtain the signal of sensor immediately, triggering sends control signal or regulated signal, irrelevant by demand pro rate flow with load to make each seed oil road realize.
In addition, the utility model can also anti-current amount saturated, system total discharge can regulate as required automatically, and simple and practical, modularization, meets consumers' demand flexibly.
Fig. 4 is the schematic diagram of another embodiment of the utility model electricity proportional flow distribution system.As shown in Figure 4, comprise electric proportional variable pump 401, electricity proportional throttle valve 402, sensor 403 and controller 404, electricity proportional variable pump 401 is connected to final controlling element 405 through electric proportional throttle valve 402, in figure, solid line is that oil circuit connects, dotted line is control signal, wherein, electricity proportional variable pump 401, electricity proportional throttle valve 402 and controller 404 and electric proportional variable pump 301 in Fig. 3, electricity proportional throttle valve 302 is identical with controller 304 or similar, sensor 403 is Motion sensor, be arranged on final controlling element 405, detect the displacement of final controlling element 405, speed, one or more values in angular displacement or angular velocity.The above-mentioned information that controller 404 can be sent by Motion sensor 403i carries out Bit andits control or speeds control to final controlling element 405i, such as, need to realize that each final controlling element displacement is equal or displacement difference is equal.
Such as, when final controlling element 405i is hydraulic jack, Motion sensor 403i detects displacement or the speed of oil cylinder inner piston rod; When final controlling element 405i is oil hydraulic motor, Motion sensor 403i detects angle or the angular velocity of motor output shaft.
For final controlling element 405i for hydraulic jack, each final controlling element operationally, needs multi-cylinder synchronous, equal proportion to carry out action.At this moment, Motion sensor 403i detects the displacement state of final controlling element 405i, and send to controller 404, when controller 404 is according to the displacement state of each final controlling element received, obtain the flow information on each seed oil road, when judgement system total discharge is lower than the first predetermined value, illustrate that system total discharge that electric proportional variable pump 401 provides does not meet the demand of each final controlling element action, now, controller 404 sends the control signal of increase system total discharge to electric proportional variable pump 401, and electric proportional variable pump 401 increases system total discharge according to control signal; When controller 404 judges system total discharge higher than the first predetermined value, illustrate that system total discharge that electric proportional variable pump 401 provides has exceeded the demand of each final controlling element 405i action, now, controller 404 sends the control signal of reduction system total discharge to electric proportional variable pump 401, and electric proportional variable pump 401 reduces system total discharge according to control signal.
Each hydraulic cylinder displacement is controlled equal for needs, when final controlling element 405i goes wrong, such as, when displacement reduces suddenly, controller 404 obtains its seed oil road, place flow information according to the data that Motion sensor 403i sends, judge that the flow on its seed oil road, place accounts for system total discharge ratio lower than the second predetermined value, the regulated signal increasing valve port opening is then sent to electric proportional throttle valve 402i, to increase the flow on this seed oil road, make the displacement and other final controlling element holding position phase shifts etc. of final controlling element 405i.When displacement increases suddenly, according to the data that Motion sensor 403i sends, controller judges that the flow on its seed oil road accounts for system total discharge ratio higher than the second predetermined value, the regulated signal reducing valve port opening is then sent to electric proportional throttle valve 402i, to reduce the flow on this seed oil road, make the displacement and other final controlling element holding position phase shifts etc. of final controlling element 405i.
Preferably, in above-described embodiment, when the flow on the seed oil road at final controlling element 405i place accounts for system total discharge ratio second prespecified range and the electric proportional throttle valve 402i opening of this oil circuit is maximum, when electricity proportional variable pump 401 also cannot provide larger oil mass, the electric proportional throttle valve valve port opening on other seed oil roads can be reduced simultaneously, to make each seed oil road flow remain in predetermined proportion, and then meet the action demand of final controlling element.
Those skilled in the art are scrutable by the utility model is, second prespecified range can be, the seed oil road flow first associated with final controlling element 405i operation acts accounts for the number range centered by the ratio value of system total discharge, and concrete scope can set according to different service conditions and required precision.
Preferably, as shown in Figure 4, also comprise in above-described embodiment and be arranged on seed oil road, final controlling element 405i place, for the solenoid directional control valve 406i of the moving direction of adjusting actuator 405i, such as two-position four way change valve.
In one embodiment, the direction that solenoid directional control valve 406i switches seed oil road can be controlled, so that the moving direction of adjusting actuator 405i by controller 404.After the moving direction of solenoid directional control valve 406i adjusting actuator 405i, controller 404 continues to judge according to the seed oil road flow information at the final controlling element 405i place received, and sends corresponding control signal or regulated signal.
Those skilled in the art are scrutable is, the triggering of control signal and regulated signal can be carry out simultaneously, also can not simultaneously carry out, namely electric proportional variable pump and electric proportional throttle valve can regulate simultaneously, what coordinate realization and load to have nothing to do presses demand pro rate flow, also can according to actual conditions, only regulate electric proportional variable pump or electric proportional throttle valve to realize irrelevant by demand pro rate flow with load.
Electric proportional flow distribution system of the present utility model, adopt closed loop control, multichannel flow and load can be realized independently by demand pro rate, the amount of anti-current is simultaneously saturated, and system total discharge can regulate as required automatically, when occurring emergency case, certain final controlling element breaks down oil circuit oil mass when increasing suddenly or reduce, controller can obtain the signal of sensor immediately, sends control signal or regulated signal, irrelevant by demand pro rate flow with load to make each oil circuit realize.
In addition, the utility model can also anti-current amount saturated, system total discharge can regulate as required automatically, and simple and practical, modularization, meets consumers' demand flexibly.
Below in conjunction with Fig. 2 and Fig. 3, exemplary illustration is carried out to electric proportional flow distribution system of the present utility model.
The action of each final controlling element 305i can be divided into action simultaneously and intermitten.
Action phase simultaneously, original state, electric proportional variable pump 301 discharge capacity is maximum, and electric proportional throttle valve 302i valve port is opened to maximum, regulates the valve position of solenoid directional control valve 306i according to the direction of action of final controlling element 305i.If controller 304 judges that system total discharge cannot meet the action demand of final controlling element, namely lower than the first prespecified range, then controller 304 transmits control signal to electric proportional variable pump, makes electric proportional variable pump 301 increase discharge capacity; If higher than the first prespecified range, then reduce discharge capacity.Flow transducer 303i detects the seed oil road flow information at final controlling element 305i place and sends to controller 304, controller 304 judges that according to seed oil road flow information the flow on the seed oil road at final controlling element 305i place accounts for system total discharge ratio whether in the second prespecified range, if lower than the second prespecified range, then send the regulated signal increasing valve port opening to electric proportional throttle valve 302i; If higher than the second prespecified range, then send the regulated signal reducing valve port opening to electric proportional throttle valve 302i.
In the intermitten stage, in this stage, some final controlling element has not needed action or action to end of travel.At this moment, the electric proportional throttle valve 302i on seed oil road, final controlling element 305i place that action has completed closes.Controller 304 sends the control signal of reduction system total discharge to electric proportional variable pump 301, ensures the speed requirement of the final controlling element that other actions do not complete.When final controlling element 305i is from when stopping action becoming work, controller 304 sends the control signal of increase system total discharge to electric proportional variable pump 301, send the regulated signal increasing valve port opening to electric proportional throttle valve 302i, meet required proportionate relationship to make the flow on each seed oil road.Preferably, controller 304, also according to the actual conditions on each seed oil road, sends regulated signal, to regulate the ratio of each seed oil road flow to other final controlling element.
The electric proportional flow distribution system of one of the present utility model, can realize multichannel flow and load independently by demand pro rate, precision is high, response is fast.
In addition, the utility model can also anti-current amount saturated, system total discharge can regulate as required automatically, and simple and practical, modularization, meets consumers' demand flexibly.
Description of the present utility model provides for the purpose of example and description, and is not exhaustively or by the utility model be limited to disclosed form.Many modifications and variations are obvious for the ordinary skill in the art.Selecting and describing embodiment is in order to principle of the present utility model and practical application are better described, and enables those of ordinary skill in the art understand the utility model thus design the various embodiments with various amendment being suitable for special-purpose.
Claims (5)
1. an electric proportional flow distribution system, is characterized in that, comprising: controller, for the electric proportional variable pump of regulating system total discharge, for regulating the electric proportional throttle valve of seed oil road flow and the sensor for detecting seed oil road flow information, wherein:
In each seed oil road, one end of described electric proportional throttle valve is connected to described electric proportional variable pump, and the other end is connected to final controlling element; Described electric proportional variable pump, described electric proportional throttle valve and described sensor are electrically connected to described controller respectively;
Described controller be adapted to be when obtain according to the flow information on described seed oil road system total discharge not in the first prespecified range time, trigger described electric proportional variable pump regulating system total discharge; When the flow obtaining described seed oil road according to described seed oil road flow information account for system total discharge ratio not in the second prespecified range time, the described electric proportional throttle valve triggered on described seed oil road regulates valve port opening.
2. system according to claim 1, is characterized in that, described sensor is be arranged at the flow transducer on the seed oil road between described electric proportional throttle valve and described final controlling element, detects the flow value on described seed oil road.
3. system according to claim 1, is characterized in that, described sensor is for being arranged at the Motion sensor on final controlling element described in seed oil road, and that detects in the displacement of described final controlling element, speed, angular displacement or angular velocity is one or more.
4., according to the arbitrary described system of claim 1-3, it is characterized in that, also comprise the solenoid directional control valve for regulating described actuator motions direction, described solenoid directional control valve is arranged on the seed oil road between described electric proportional throttle valve and described final controlling element.
5. system according to claim 4, is characterized in that,
Described controller is adapted to be when obtaining system total discharge lower than the first prespecified range according to the flow information on described seed oil road, triggers described electric proportional variable pump and increases system total discharge; When system total discharge is higher than the first prespecified range, triggers described electric proportional variable pump and reduce system total discharge; Also be adapted to be when obtaining described seed oil road flow according to the flow information on described seed oil road and accounting for system total discharge ratio lower than the second prespecified range, the described electric proportional throttle valve triggered on described seed oil road increases valve port opening; When described seed oil road flow accounts for system total discharge ratio higher than the second prespecified range, the described electric proportional throttle valve triggered on described seed oil road reduces valve port opening.
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| CN201520437984.XU CN205001273U (en) | 2015-06-24 | 2015-06-24 | Electric proportional flow distribution system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106321539A (en) * | 2015-06-24 | 2017-01-11 | 徐工集团工程机械股份有限公司 | Method and system for electric proportional flow quantity distribution |
| CN106499680A (en) * | 2016-10-13 | 2017-03-15 | 长沙中联消防机械有限公司 | For the control device of assignment of traffic, method, hydraulic system and engineering machinery |
| CN109058234A (en) * | 2018-10-24 | 2018-12-21 | 徐州工程学院 | A kind of electric proportional control valve compensation excavator hydraulic system Performance Test System and detection method |
| CN109989954A (en) * | 2019-04-18 | 2019-07-09 | 广西玉柴专用汽车有限公司 | A kind of sequential-controlled hydraulic system and its control method |
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2015
- 2015-06-24 CN CN201520437984.XU patent/CN205001273U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106321539A (en) * | 2015-06-24 | 2017-01-11 | 徐工集团工程机械股份有限公司 | Method and system for electric proportional flow quantity distribution |
| CN106499680A (en) * | 2016-10-13 | 2017-03-15 | 长沙中联消防机械有限公司 | For the control device of assignment of traffic, method, hydraulic system and engineering machinery |
| CN109058234A (en) * | 2018-10-24 | 2018-12-21 | 徐州工程学院 | A kind of electric proportional control valve compensation excavator hydraulic system Performance Test System and detection method |
| CN109058234B (en) * | 2018-10-24 | 2020-06-09 | 徐州工程学院 | Performance test system and detection method for hydraulic system of electric proportional control valve compensation excavator |
| CN109989954A (en) * | 2019-04-18 | 2019-07-09 | 广西玉柴专用汽车有限公司 | A kind of sequential-controlled hydraulic system and its control method |
| CN109989954B (en) * | 2019-04-18 | 2024-04-05 | 广西玉柴专用汽车有限公司 | Sequential control hydraulic system and control method thereof |
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