CN104564634A - Pumping frequency control method, pumping frequency control system and pumping equipment - Google Patents
Pumping frequency control method, pumping frequency control system and pumping equipment Download PDFInfo
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- CN104564634A CN104564634A CN201410668211.2A CN201410668211A CN104564634A CN 104564634 A CN104564634 A CN 104564634A CN 201410668211 A CN201410668211 A CN 201410668211A CN 104564634 A CN104564634 A CN 104564634A
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Abstract
The invention discloses a pumping frequency control method, a pumping frequency control system and pumping equipment, which relate to the field of oil pump control. The embodiment of the invention chooses the stroke of a pumping oil cylinder as a reference for adjusting the pumping frequency of each oil pump; not only because the stroke of the pumping oil cylinder can reflect the pumping frequency information of the oil pump, but also because the stroke information can be acquired for multiple times in one pumping process, i.e., the cycle of acquiring the stroke of the pumping oil cylinder is far less than the pumping cycle, generally, the pumping cycle is at a second level, while the stroke acquisition cycle is at a millisecond level, the pumping frequency of the oil pump can be adjusted more timely; furthermore, in aregulation adjustment process, the difference between the actual stroke of the pumping oil cylinder of each oil pump and the theoretical stroke is taken as an adjustment reference, so that the pumping frequency can be dynamically adjusted according to the actual working condition of each oil pump; compared with a fixed-value regulation method, the control method disclosed by the invention can more accurately adjust the pumping frequency, the pumping frequency only can infinitely approach to a theoretical value, and the phenomenon of overadjustment cannot take place.
Description
Technical field
The present invention relates to oil pump control field, particularly a kind of controlling method of pumping number of times and control system and pumping equipment.
Background technique
Concrete mixer is the building machinery integrating delivering concrete He build operation, can delivering concrete rapidly continuously, is the indispensable engineering machinery of modern architecture.Oil pump its actual pumping number of times and target pumping number of times in pumping procedure of concrete mixer have some gaps often, and can along with time variations, and value optimum under the normally identical operating mode of target pumping number of times, if therefore can accurately control pumping number of times, just accurately can control pumping concrete square amount, thus lifting construction effect.
Current oil pump mainly utilizes the proximity switch in oil cylinder tank to adjust pumping number of times.When cylinder body moves reciprocatingly, proximity switch often detects piston head just record pumping number of times, simultaneously proximity switch will detect piston head near tank as signal to adjust pumping number of times.The pumping number of times such as set is 20 times per minute, and namely once, actual measurement is pump per minute 18 times to every 3 seconds pumps, and few pump per minute twice is described.Current regulative mode be each proximity switch detect piston head near time adjust, be every 3 seconds and adjust once, and each adjustment engine speed increases or reduces by a fixed value Δ rule of thumb set, but every platform pump truck actual conditions may be different, the actual pumping number of times possibility of such as every platform pump truck 17 times, 17.5 times, 18 times, 19 times, 20 times, 21 times, 22 is inferior, therefore the accuracy of the regulating method adjustment of fixed value is bad, also there will be over control, adjustment result is shaken round objective result, a lot of cycles may be caused all to regulate not in place, if 7 cycles just can adjust to the right place, so need 7 × 3=21 just can adjust second, real-time is poor.
Therefore, be necessary the control technique proposing a kind of new oil pump pumping number of times, with solve regulate at present in the poor real that exists, poor accuracy, and the problem such as overshoot.
Summary of the invention
An embodiment of the present invention technical problem to be solved is: the problem of the poor real existed in oil pump pumping number of times regulation technology at present.
An embodiment of the present invention technical problem to be solved is: the poor accuracy existed in oil pump pumping number of times regulation technology at present and overshoot problem.
An aspect of the embodiment of the present invention provides a kind of controlling method of pumping number of times, comprising: the actual extending amount obtaining the pumping oil cylinder of displacement transducer Real-time Collection; The extending amount difference of pumping oil cylinder is determined by the actual extending amount and theoretical extending amount comparing pumping oil cylinder; The extending amount of extending amount difference to pumping oil cylinder according to pumping oil cylinder regulates in real time, to reduce the gap between the actual extending amount of pumping oil cylinder and theoretical extending amount, thus adjusted the pumping number of times of oil pump in real time by the extending amount adjusting pumping oil cylinder in real time.
In one embodiment, carry out regulating in real time comprising to the extending amount of pumping oil cylinder according to the extending amount difference of pumping oil cylinder: the extending amount difference according to pumping oil cylinder is regulated in real time by adjustment engine speed and the extending amount of oil pump capacity to pumping oil cylinder.
In one embodiment, carry out regulating in real time comprising to the extending amount of pumping oil cylinder by adjustment engine speed and oil pump capacity according to the extending amount difference of pumping oil cylinder: the volume differences determining hydraulic oil according to the extending amount difference of pumping oil cylinder; The regulated quantity of engine speed and the regulated quantity of oil pump capacity is determined according to the volume differences of hydraulic oil; The regulated quantity of engine speed and control electric current corresponding to the regulated quantity of oil pump capacity are exported to respectively the electric proportional valve of motor and oil pump, make motor according to rotating speed regulated quantity the basis of actual speed raise turn over speed and drive operation of oil pump, make electric proportional valve according to the oily pump delivery of the control Current adjustment that the regulated quantity of oil pump capacity is corresponding, thus adjusted the pumping number of times of oil pump by the extending amount adjusting pumping oil cylinder in real time in real time.
In one embodiment, extending amount difference according to pumping oil cylinder carries out regulating in real time comprising to the extending amount of pumping oil cylinder: if the extending amount difference of pumping oil cylinder is greater than zero, illustrate that the actual extending amount of pumping oil cylinder is greater than theoretical extending amount, then reduce the extending amount of pumping oil cylinder, thus reduce the pumping number of times of oil pump; If the extending amount difference of pumping oil cylinder is less than zero, illustrate that the actual extending amount of pumping oil cylinder is less than theoretical extending amount, then increase the extending amount of pumping oil cylinder, thus increase the pumping number of times of oil pump.
In one embodiment, the theoretical extending amount of pumping oil cylinder adopts following formulae discovery:
Lo＝To÷to×L，to＝1÷Co；
Wherein, To represents the acanning cycle of the control system of the controlling method performing pumping number of times, L represents the length of pumping oil cylinder, the target pumping number of times of oil pump in the Co representation unit time, spent time on the Distance Theory that to represents pumping cylinder movement L, Lo represents the theoretical extending amount of pumping oil cylinder in the acanning cycle.
In one embodiment, before the actual extending amount detecting in real time pumping oil cylinder, described method also comprises: according to the rotating speed of target of present load pressure determination motor and control electric current corresponding to the target discharge capacity of oil pump; Rotating speed of target and control electric current corresponding to target discharge capacity are exported to respectively the electric proportional valve of motor and oil pump, make motor drive operation of oil pump according to rotating speed of target, make electric proportional valve according to control Current Control oil pump delivery corresponding to target discharge capacity.
In one embodiment, before rotating speed of target and control electric current corresponding to target discharge capacity are exported to the electric proportional valve of motor and oil pump respectively, described method also comprises: electric proportional valve initial speed and control electric current corresponding to initial displacement being exported to respectively motor and oil pump, make motor drive operation of oil pump according to initial speed, make electric proportional valve according to the oily pump delivery of the control Current Control that initial displacement is corresponding.
Another aspect of the embodiment of the present invention provides a kind of control system of pumping number of times, comprising: information acquisition unit, for obtaining the actual extending amount of the pumping oil cylinder of displacement transducer Real-time Collection; Comparing unit, determines the extending amount difference of pumping oil cylinder for the actual extending amount and theoretical extending amount by comparing pumping oil cylinder; Regulon, regulate in real time for the extending amount of extending amount difference to pumping oil cylinder according to pumping oil cylinder, to reduce the gap between the actual extending amount of pumping oil cylinder and theoretical extending amount, thus adjusted the pumping number of times of oil pump in real time by the extending amount adjusting pumping oil cylinder in real time.
In one embodiment, regulon specifically for: regulated in real time by adjustment engine speed and the extending amount of oil pump capacity to pumping oil cylinder according to the extending amount difference of pumping oil cylinder.
In one embodiment, regulon is specifically for the volume differences of determining hydraulic oil according to the extending amount difference of pumping oil cylinder; The regulated quantity of engine speed and the regulated quantity of oil pump capacity is determined according to the volume differences of hydraulic oil; The regulated quantity of engine speed and control electric current corresponding to the regulated quantity of oil pump capacity are exported to respectively the electric proportional valve of motor and oil pump, make motor according to rotating speed regulated quantity the basis of actual speed raise turn over speed and drive operation of oil pump, make electric proportional valve according to the oily pump delivery of the control Current adjustment that the regulated quantity of oil pump capacity is corresponding, thus adjusted the pumping number of times of oil pump by the extending amount adjusting pumping oil cylinder in real time in real time.
In one embodiment, regulon, specifically for: if the extending amount difference of pumping oil cylinder is greater than zero, illustrate that the actual extending amount of pumping oil cylinder is greater than theoretical extending amount, then reduce the extending amount of pumping oil cylinder, thus reduce the pumping number of times of oil pump; If the extending amount difference of pumping oil cylinder is less than zero, illustrate that the actual extending amount of pumping oil cylinder is less than theoretical extending amount, then increase the extending amount of pumping oil cylinder, thus increase the pumping number of times of oil pump.
In one embodiment, control system also comprises: control unit, for according to the rotating speed of target of present load pressure determination motor and control electric current corresponding to the target discharge capacity of oil pump; Rotating speed of target and control electric current corresponding to target discharge capacity are exported to respectively the electric proportional valve of motor and oil pump, make motor drive operation of oil pump according to rotating speed of target, make electric proportional valve according to control Current Control oil pump delivery corresponding to target discharge capacity.
In one embodiment, control unit is also for before exporting to the electric proportional valve of motor and oil pump respectively by rotating speed of target and control electric current corresponding to target discharge capacity, initial speed and control electric current corresponding to initial displacement are exported to respectively the electric proportional valve of motor and oil pump, make motor drive operation of oil pump according to initial speed, make electric proportional valve according to the oily pump delivery of the control Current Control that initial displacement is corresponding.
Another aspect of the embodiment of the present invention provides a kind of pumping equipment, comprising: the control system of aforementioned pumping number of times and displacement transducer; Displacement transducer is used for the actual extending amount of Real-time Collection pumping oil cylinder, and sends to control system.
In one embodiment, pumping equipment also comprises: speed probe, for the actual speed of Real-time Collection motor, and sends to control system.
The embodiment of the present invention chooses the extending amount of pumping oil cylinder as the foundation regulating oil pump pumping number of times, extending amount due to pumping oil cylinder can not only reflect oil pump pumping number information, and extending amount information can be repeatedly obtained in a pumping procedure, namely the acquisition cycle of the extending amount of pumping oil cylinder is far smaller than pump cycles, usual pump cycles is level second, and the extending amount acquisition cycle can be Millisecond, thus the pumping number of times of oil pump can be adjusted more in time; And, be in course of adjustment, using the gap of the extending amount of oneself reality of pumping oil cylinder of every platform oil pump and theoretical extending amount as the foundation regulated, thus can dynamically adjust pumping number of times according to the actual conditions of every platform oil pump, relative to the adjusting method of fixed value, the adjustment of pumping number of times can be more accurate, only meeting infinite approach theoretical value, and there will not be the phenomenon of overshoot.
By referring to the detailed description of accompanying drawing to exemplary embodiment of the present invention, further feature of the present invention and advantage thereof will become clear.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technological scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, 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 flow sheet of a controlling method embodiment of pumping number of times of the present invention.
Fig. 2 is the structural representation of a control system embodiment of pumping number of times of the present invention.
Fig. 3 is the structural representation of another embodiment of control system of pumping number of times of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technological scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's 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 present invention and application or use.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
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 the scope of the invention.
For the poor real existed in current oil pump pumping number of times regulation technology, the problem such as poor accuracy and overshoot, inventor analyses in depth the working procedure of pumping equipment and oil pump thereof, find to there is certain corresponding relation between the extending amount of pumping oil cylinder and the pumping number of times of oil pump, the extending amount of pumping oil cylinder can reflect oil pump pumping number information, and, extending amount information can be repeatedly obtained in a pumping procedure, namely the acquisition cycle of the extending amount of pumping oil cylinder is far smaller than pump cycles, usual pump cycles is level second, and the extending amount acquisition cycle can be Millisecond, therefore,
Choose the extending amount of pumping oil cylinder as the foundation regulating oil pump pumping number of times, and the extending amount based on pumping oil cylinder realizes the control program of oil pump pumping number of times, thus solve the poor real, the problem such as poor accuracy and overshoot that exist in existing oil pump pumping number of times regulation technology.Corresponding relation between the extending amount of lower surface analysis pump oil cylinder and the pumping number of times of oil pump.
Corresponding relation between the extending amount of pumping oil cylinder and the pumping number of times of oil pump is as follows:
L＝To÷t×L＝To÷(1÷C)×L＝To×C×L；
Wherein, To represents the acquisition cycle of the extending amount of pumping oil cylinder, also it is the acanning cycle of the control system of pumping number of times, L represents the length of pumping oil cylinder, the pumping number of times of oil pump in the C representation unit time, t represents the distance spent time of pumping cylinder movement L, and L represents the extending amount of pumping oil cylinder in the acanning cycle.
As can be seen from above-mentioned formula, the extending amount of pumping oil cylinder and the pumping number of times direct proportionality of oil pump.If the actual extending amount of pumping oil cylinder is greater than theoretical extending amount, then the actual frequency of pumping than theoretic pumping often, illustrates the excessive velocities of now pumping, should reduce the extending amount of pumping oil cylinder, thus reduces the pumping number of times of oil pump.Accordingly, if the actual extending amount of pumping oil cylinder is less than theoretical extending amount, then the actual frequency of pumping is fewer than theoretic pumping number of times, illustrates that the speed of now pumping is excessively slow, should increase the extending amount of pumping oil cylinder, thus increases the pumping number of times of oil pump.
Applying above-mentioned formula, when knowing target pumping number of times (i.e. the theoretical pumping number of times) of oil pump in the unit time under a certain operating mode, the theoretical extending amount of pumping oil cylinder in the acanning cycle can be calculated.Namely the theoretical extending amount of pumping oil cylinder adopts following formulae discovery:
Lo＝To÷to×L＝To÷(1÷Co)×L＝To×Co×L；
Wherein, To represents the acquisition/sense cycle of the extending amount of pumping oil cylinder, also it is the acanning cycle of the control system of pumping number of times, L represents the length of pumping oil cylinder, the target pumping number of times of oil pump in the Co representation unit time, spent time on the Distance Theory that to represents pumping cylinder movement L, Lo represents the theoretical extending amount of pumping oil cylinder in the acanning cycle.
Suppose that length of oil cylinder is L, target pumping number of times is 11.5 beats/min, and the time of pumping should be so in theory: 60 seconds ÷ 11.5 times=5217.4 milli second/time, i.e. consuming time on the Distance Theory of cylinder movement L is 5217.4 milliseconds.The acanning cycle supposing control system is 50ms, and so in one-period 50ms, the theoretical extending amount of pumping oil cylinder is: 50 milliseconds/5217.4 milliseconds × L=0.00958L.
According to the corresponding relation between the extending amount of the pumping oil cylinder of above-mentioned analysis and the pumping number of times of oil pump, illustrate the control program of the oil pump pumping number of times that the extending amount based on pumping oil cylinder realizes below.
Fig. 1 is the schematic flow sheet of a controlling method embodiment of pumping number of times of the present invention.As shown in Figure 1, the controlling method of the present embodiment can be performed by control system, comprises the following steps:
Step S102, obtains the actual extending amount of the pumping oil cylinder of displacement transducer Real-time Collection.
Wherein, displacement transducer can be arranged on the side of piston head in pumping oil cylinder.
Step S104, determines the extending amount difference of pumping oil cylinder by the actual extending amount and theoretical extending amount comparing pumping oil cylinder.
Step S106, the extending amount of extending amount difference to pumping oil cylinder according to pumping oil cylinder regulates in real time, to reduce the gap between the actual extending amount of pumping oil cylinder and theoretical extending amount, thus adjusted the pumping number of times of oil pump in real time by the extending amount adjusting pumping oil cylinder in real time.
Wherein, if the extending amount difference of pumping oil cylinder is greater than zero, illustrate that the actual extending amount of pumping oil cylinder is greater than theoretical extending amount, then reduce the extending amount of pumping oil cylinder, thus reduce the pumping number of times of oil pump.If the extending amount difference of pumping oil cylinder is less than zero, illustrate that the actual extending amount of pumping oil cylinder is less than theoretical extending amount, then increase the extending amount of pumping oil cylinder, thus increase the pumping number of times of oil pump.
In pumping equipment, motor can drive oil pump to rotate, oil pump can the discharge capacity of regulator solution force feed single by electric proportional valve, and engine speed and oil pump capacity can determine hydraulic oil volume in the unit time, and in the unit time, hydraulic oil volume can affect the extending amount of pumping oil cylinder.Therefore, wherein a kind of implementation method of step S106 can be regulated by adjustment engine speed and the extending amount of oil pump capacity to pumping oil cylinder in real time according to the extending amount difference of pumping oil cylinder, specifically comprises the following steps:
Step S1062, determines the volume differences of hydraulic oil according to the extending amount difference of pumping oil cylinder.
One method can utilize formula: the extending amount difference of the volume differences=oil cylinder cross-section area × pumping oil cylinder of hydraulic oil, determines the volume differences of hydraulic oil.
Step S1064, determines the regulated quantity of engine speed and the regulated quantity of oil pump capacity according to the volume differences of hydraulic oil.
If the extending amount difference of pumping oil cylinder is greater than zero, then the volume differences of hydraulic oil is greater than zero, illustrates that the actual extending amount of pumping oil cylinder is greater than theoretical extending amount, then can reduce engine speed and/or reduce oil pump capacity, to reduce the extending amount of pumping oil cylinder.Otherwise, if the extending amount difference of pumping oil cylinder is less than zero, then the volume differences of hydraulic oil is less than zero, illustrates that the actual extending amount of pumping oil cylinder is less than theoretical extending amount, then can improve engine speed and/or increase oil pump capacity, to increase the extending amount of pumping oil cylinder.
Step S1066, the regulated quantity of engine speed and control electric current corresponding to the regulated quantity of oil pump capacity are exported to respectively the electric proportional valve of motor and oil pump, make motor according to rotating speed regulated quantity the basis of actual speed raise turn over speed and drive operation of oil pump, make electric proportional valve according to the oily pump delivery of the control Current adjustment that the regulated quantity of oil pump capacity is corresponding, thus adjusted the pumping number of times of oil pump by the extending amount adjusting pumping oil cylinder in real time in real time.
The embodiment of the present invention chooses the extending amount of pumping oil cylinder as the foundation regulating oil pump pumping number of times, extending amount due to pumping oil cylinder can not only reflect oil pump pumping number information, and extending amount information can be repeatedly obtained in a pumping procedure, namely the acquisition cycle of the extending amount of pumping oil cylinder is far smaller than pump cycles, usual pump cycles is level second, and the extending amount acquisition cycle can be Millisecond, thus the pumping number of times of oil pump can be adjusted more in time, generally just error requirements can be met at several ms, and prior art needs several seconds even tens seconds usually, and, be in course of adjustment, using the gap of the extending amount of oneself reality of pumping oil cylinder of every platform oil pump and theoretical extending amount as the foundation regulated, thus can dynamically adjust pumping number of times according to the actual conditions of every platform oil pump, relative to the adjusting method of fixed value, the adjustment of pumping number of times can be more accurate, only meeting infinite approach theoretical value, and there will not be the phenomenon of overshoot.
Before oil pump pumping number of times is controlled in real time, can will expect that the target component reached sends to motor and oil pump.Such as before the actual extending amount detecting pumping oil cylinder in real time, the control electric current of the rotating speed of target (theoretical rotational speed namely under current working) of motor and target discharge capacity (Theoretical flowing capacity namely under the current working) correspondence of oil pump can be determined according to present load pressure (high pressure oil pressure is the main driving load of motor), and rotating speed of target and control electric current corresponding to target discharge capacity are exported to respectively the electric proportional valve of motor and oil pump, motor is made to drive operation of oil pump according to rotating speed of target, make electric proportional valve according to the oily pump delivery of the control Current Control that target discharge capacity is corresponding.
Wherein, expect that the consumption indicator that the target component (as the rotating speed of target of motor, the target discharge capacity, target pumping number of times etc. of oil pump) that reaches can inquire about this pumping equipment according to current working obtains.Consumption indicator can obtain according to field test data, also can be provided by producer.The information such as control electric current, target pumping number of times that induced pressure, engine target rotating speed, oil pump target discharge capacity are corresponding is such as comprised in consumption indicator.
In order to extend the working life of pumping equipment, initial speed and initial displacement can also be set, and initial speed and control electric current corresponding to initial displacement are exported to respectively the electric proportional valve of motor and oil pump, make motor drive operation of oil pump according to initial speed, make electric proportional valve according to the oily pump delivery of the control Current Control that initial displacement is corresponding.
The embodiment of the present invention also proposes a kind of pumping equipment, such as concrete mixer etc.Pumping equipment comprises: the control system of pumping number of times and displacement transducer; Displacement transducer is used for the actual extending amount of Real-time Collection pumping oil cylinder, and sends to control system.Pumping equipment also comprises: speed probe, for the actual speed of Real-time Collection motor, and sends to control system.
With reference to figure 2, the control system of pumping number of times comprises:
Information acquisition unit 202, for obtaining the actual extending amount of the pumping oil cylinder of displacement transducer Real-time Collection;
Comparing unit 204, determines the extending amount difference of pumping oil cylinder for the actual extending amount and theoretical extending amount by comparing pumping oil cylinder;
Regulon 206, regulate in real time for the extending amount of extending amount difference to pumping oil cylinder according to pumping oil cylinder, to reduce the gap between the actual extending amount of pumping oil cylinder and theoretical extending amount, thus adjusted the pumping number of times of oil pump in real time by the extending amount adjusting pumping oil cylinder in real time.
In one embodiment, regulon 206 specifically for: regulated in real time by adjustment engine speed and the extending amount of oil pump capacity to pumping oil cylinder according to the extending amount difference of pumping oil cylinder.
In one embodiment, regulon 206 is specifically for the volume differences of determining hydraulic oil according to the extending amount difference of pumping oil cylinder; The regulated quantity of engine speed and the regulated quantity of oil pump capacity is determined according to the volume differences of hydraulic oil; The regulated quantity of engine speed and control electric current corresponding to the regulated quantity of oil pump capacity are exported to respectively the electric proportional valve of motor and oil pump, make motor according to rotating speed regulated quantity the basis of actual speed raise turn over speed and drive operation of oil pump, make electric proportional valve according to the oily pump delivery of the control Current adjustment that the regulated quantity of oil pump capacity is corresponding, thus adjusted the pumping number of times of oil pump by the extending amount adjusting pumping oil cylinder in real time in real time.
In one embodiment, regulon 206 specifically for: if the extending amount difference of pumping oil cylinder is greater than zero, illustrate that the actual extending amount of pumping oil cylinder is greater than theoretical extending amount, then reduce the extending amount of pumping oil cylinder, thus reduce the pumping number of times of oil pump; If the extending amount difference of pumping oil cylinder is less than zero, illustrate that the actual extending amount of pumping oil cylinder is less than theoretical extending amount, then increase the extending amount of pumping oil cylinder, thus increase the pumping number of times of oil pump.
With reference to figure 3, the control system of pumping number of times also comprises: control unit 308, for according to the rotating speed of target of present load pressure determination motor and control electric current corresponding to the target discharge capacity of oil pump; Rotating speed of target and control electric current corresponding to target discharge capacity are exported to respectively the electric proportional valve of motor and oil pump, make motor drive operation of oil pump according to rotating speed of target, make electric proportional valve according to control Current Control oil pump delivery corresponding to target discharge capacity.
In one embodiment, control unit 308, also for before rotating speed of target and control electric current corresponding to target discharge capacity are exported to the electric proportional valve of motor and oil pump respectively, initial speed and control electric current corresponding to initial displacement are exported to respectively the electric proportional valve of motor and oil pump, make motor drive operation of oil pump according to initial speed, make electric proportional valve according to the oily pump delivery of the control Current Control that initial displacement is corresponding.
The embodiment of the present invention chooses the extending amount of pumping oil cylinder as the foundation regulating oil pump pumping number of times, extending amount due to pumping oil cylinder can not only reflect oil pump pumping number information, and extending amount information can be repeatedly obtained in a pumping procedure, namely the acquisition cycle of the extending amount of pumping oil cylinder is far smaller than pump cycles, usual pump cycles is level second, and the extending amount acquisition cycle can be Millisecond, thus the pumping number of times of oil pump can be adjusted more in time, generally just error requirements can be met at several ms, and prior art needs several seconds even tens seconds usually, and, be in course of adjustment, using the gap of the extending amount of oneself reality of pumping oil cylinder of every platform oil pump and theoretical extending amount as the foundation regulated, thus can dynamically adjust pumping number of times according to the actual conditions of every platform oil pump, relative to the adjusting method of fixed value, the adjustment of pumping number of times can be more accurate, only meeting infinite approach theoretical value, and there will not be the phenomenon of overshoot.
One of ordinary skill in the art will appreciate that all or part of step realizing above-described embodiment can have been come by hardware, the hardware that also can carry out instruction relevant by program completes, described program can be stored in a kind of computer-readable recording medium, the above-mentioned storage medium mentioned can be ROM (read-only memory), disk or CD etc.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (16)
1. a controlling method for pumping number of times, is characterized in that, comprising:
Obtain the actual extending amount of the pumping oil cylinder of displacement transducer Real-time Collection;
The extending amount difference of pumping oil cylinder is determined by the actual extending amount and theoretical extending amount comparing pumping oil cylinder;
The extending amount of extending amount difference to pumping oil cylinder according to pumping oil cylinder regulates in real time, to reduce the gap between the actual extending amount of pumping oil cylinder and theoretical extending amount, thus adjusted the pumping number of times of oil pump in real time by the extending amount adjusting pumping oil cylinder in real time.
2. method according to claim 1, is characterized in that, the described extending amount difference according to pumping oil cylinder carries out regulating in real time comprising to the extending amount of pumping oil cylinder:
Extending amount difference according to pumping oil cylinder is regulated in real time by adjustment engine speed and the extending amount of oil pump capacity to pumping oil cylinder.
3. method according to claim 2, is characterized in that, the described extending amount difference according to pumping oil cylinder carries out regulating in real time comprising to the extending amount of pumping oil cylinder by adjustment engine speed and oil pump capacity:
The volume differences of hydraulic oil is determined according to the extending amount difference of pumping oil cylinder;
The regulated quantity of engine speed and the regulated quantity of oil pump capacity is determined according to the volume differences of hydraulic oil;
The regulated quantity of engine speed and control electric current corresponding to the regulated quantity of oil pump capacity are exported to respectively the electric proportional valve of motor and oil pump, make motor according to rotating speed regulated quantity the basis of actual speed raise turn over speed and drive operation of oil pump, make electric proportional valve according to the oily pump delivery of the control Current adjustment that the regulated quantity of oil pump capacity is corresponding, thus adjusted the pumping number of times of oil pump by the extending amount adjusting pumping oil cylinder in real time in real time.
4. method according to claim 1, is characterized in that, the described extending amount difference according to pumping oil cylinder carries out regulating in real time comprising to the extending amount of pumping oil cylinder:
If the extending amount difference of pumping oil cylinder is greater than zero, illustrate that the actual extending amount of pumping oil cylinder is greater than theoretical extending amount, then reduce the extending amount of pumping oil cylinder, thus reduce the pumping number of times of oil pump;
If the extending amount difference of pumping oil cylinder is less than zero, illustrate that the actual extending amount of pumping oil cylinder is less than theoretical extending amount, then increase the extending amount of pumping oil cylinder, thus increase the pumping number of times of oil pump.
5. method according to claim 1, is characterized in that, the theoretical extending amount of pumping oil cylinder adopts following formulae discovery:
Lo＝To÷to×L，to＝1÷Co；
Wherein, To represents the acanning cycle of the control system of the controlling method performing pumping number of times, L represents the length of pumping oil cylinder, the target pumping number of times of oil pump in the Co representation unit time, spent time on the Distance Theory that to represents pumping cylinder movement L, Lo represents the theoretical extending amount of pumping oil cylinder in the acanning cycle.
6. method according to claim 1, is characterized in that, before the actual extending amount detecting pumping oil cylinder in real time, described method also comprises:
According to the rotating speed of target of present load pressure determination motor and control electric current corresponding to the target discharge capacity of oil pump;
Rotating speed of target and control electric current corresponding to target discharge capacity are exported to respectively the electric proportional valve of motor and oil pump, make motor drive operation of oil pump according to rotating speed of target, make electric proportional valve according to control Current Control oil pump delivery corresponding to target discharge capacity.
7. method according to claim 6, is characterized in that, before rotating speed of target and control electric current corresponding to target discharge capacity are exported to the electric proportional valve of motor and oil pump respectively, described method also comprises:
Initial speed and control electric current corresponding to initial displacement are exported to respectively the electric proportional valve of motor and oil pump, make motor drive operation of oil pump according to initial speed, make electric proportional valve according to control Current Control oil pump delivery corresponding to initial displacement.
8. a control system for pumping number of times, is characterized in that, comprising:
Information acquisition unit, for obtaining the actual extending amount of the pumping oil cylinder of displacement transducer Real-time Collection;
Comparing unit, determines the extending amount difference of pumping oil cylinder for the actual extending amount and theoretical extending amount by comparing pumping oil cylinder;
Regulon, regulate in real time for the extending amount of extending amount difference to pumping oil cylinder according to pumping oil cylinder, to reduce the gap between the actual extending amount of pumping oil cylinder and theoretical extending amount, thus adjusted the pumping number of times of oil pump in real time by the extending amount adjusting pumping oil cylinder in real time.
9. system according to claim 8, is characterized in that, described regulon, specifically for:
Extending amount difference according to pumping oil cylinder is regulated in real time by adjustment engine speed and the extending amount of oil pump capacity to pumping oil cylinder.
10. system according to claim 9, is characterized in that, described regulon, specifically for:
The volume differences of hydraulic oil is determined according to the extending amount difference of pumping oil cylinder;
The regulated quantity of engine speed and the regulated quantity of oil pump capacity is determined according to the volume differences of hydraulic oil;
The regulated quantity of engine speed and control electric current corresponding to the regulated quantity of oil pump capacity are exported to respectively the electric proportional valve of motor and oil pump, make motor according to rotating speed regulated quantity the basis of actual speed raise turn over speed and drive operation of oil pump, make electric proportional valve according to the oily pump delivery of the control Current adjustment that the regulated quantity of oil pump capacity is corresponding, thus adjusted the pumping number of times of oil pump by the extending amount adjusting pumping oil cylinder in real time in real time.
11. systems according to claim 8, is characterized in that, described regulon, specifically for:
If the extending amount difference of pumping oil cylinder is greater than zero, illustrate that the actual extending amount of pumping oil cylinder is greater than theoretical extending amount, then reduce the extending amount of pumping oil cylinder, thus reduce the pumping number of times of oil pump;
If the extending amount difference of pumping oil cylinder is less than zero, illustrate that the actual extending amount of pumping oil cylinder is less than theoretical extending amount, then increase the extending amount of pumping oil cylinder, thus increase the pumping number of times of oil pump.
12. systems according to claim 8, is characterized in that, the theoretical extending amount of pumping oil cylinder adopts following formulae discovery:
Lo＝To÷to×L，to＝1÷Co；
Wherein, To represents the acanning cycle of control system, and L represents the length of pumping oil cylinder, the target pumping number of times of oil pump in the Co representation unit time, spent time on the Distance Theory that to represents pumping cylinder movement L, Lo represents the theoretical extending amount of pumping oil cylinder in the acanning cycle.
13. systems according to claim 8, is characterized in that, described system also comprises:
Control unit, for according to the rotating speed of target of present load pressure determination motor and control electric current corresponding to the target discharge capacity of oil pump; Rotating speed of target and control electric current corresponding to target discharge capacity are exported to respectively the electric proportional valve of motor and oil pump, make motor drive operation of oil pump according to rotating speed of target, make electric proportional valve according to control Current Control oil pump delivery corresponding to target discharge capacity.
14. systems according to claim 13, is characterized in that,
Described control unit, also for before rotating speed of target and control electric current corresponding to target discharge capacity are exported to the electric proportional valve of motor and oil pump respectively, initial speed and control electric current corresponding to initial displacement are exported to respectively the electric proportional valve of motor and oil pump, make motor drive operation of oil pump according to initial speed, make electric proportional valve according to the oily pump delivery of the control Current Control that initial displacement is corresponding.
15. 1 kinds of pumping equipments, is characterized in that, comprising: the control system of the pumping number of times described in any one of claim 8-14 and displacement transducer; Displacement transducer is used for the actual extending amount of Real-time Collection pumping oil cylinder, and sends to control system.
16. pumping equipments according to claim 15, is characterized in that, also comprise: speed probe, for the actual speed of Real-time Collection motor, and send to control system.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112302914A (en) * | 2020-10-27 | 2021-02-02 | 浙江大学 | Bellows pump with stroke compensation function and stroke compensation method thereof |
| CN114329956A (en) * | 2021-12-27 | 2022-04-12 | 重庆科技学院 | Horizontal well pumping perforation critical displacement control analysis method, system and terminal |
| CN114688004A (en) * | 2022-03-16 | 2022-07-01 | 三一重机有限公司 | Flow distribution method and device and working machine |
| CN118167713A (en) * | 2024-04-24 | 2024-06-11 | 华能酒泉发电有限公司 | Hydraulic oil station on-site adjustment control method based on manual operator |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5336052A (en) * | 1993-04-28 | 1994-08-09 | Abel Pumpen Gmbh & Co. Kg | Viscous material pump |
| CN2646417Y (en) * | 2003-08-29 | 2004-10-06 | 长沙中联重工科技发展股份有限公司 | Concrete pump controller |
| JP2006322359A (en) * | 2005-05-18 | 2006-11-30 | Toyota Auto Body Co Ltd | Method and system for reducing residual quantity in transfer of viscous fluid |
| CN1987100A (en) * | 2006-12-12 | 2007-06-27 | 浙江大学 | Metering method and system for real time discharge volume of piston type concrete pump |
| CN101178061A (en) * | 2007-11-29 | 2008-05-14 | 浙江大学 | Concrete pump intelligent monitoring and control system |
| CN201486790U (en) * | 2009-08-10 | 2010-05-26 | 福田雷沃重机股份有限公司 | Pumping mechanism capable of changing strokes and pump vehicle provided therewith |
| CN202326064U (en) * | 2011-10-24 | 2012-07-11 | 中联重科股份有限公司 | Concrete pumping equipment and concrete pumping unit thereof |
| CN103114980A (en) * | 2012-06-27 | 2013-05-22 | 中联重科股份有限公司 | Pumping stroke control method of double-cylinder pump and pumping equipment |
| CN103114983A (en) * | 2012-06-27 | 2013-05-22 | 中联重科股份有限公司 | Pumping stroke control method of viscous material double-cylinder pump and viscous material pumping equipment |
| CN103410695A (en) * | 2012-06-08 | 2013-11-27 | 北汽福田汽车股份有限公司 | Pumping mechanism and pump truck provided with same |
-
2014
- 2014-11-20 CN CN201410668211.2A patent/CN104564634B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5336052A (en) * | 1993-04-28 | 1994-08-09 | Abel Pumpen Gmbh & Co. Kg | Viscous material pump |
| CN2646417Y (en) * | 2003-08-29 | 2004-10-06 | 长沙中联重工科技发展股份有限公司 | Concrete pump controller |
| JP2006322359A (en) * | 2005-05-18 | 2006-11-30 | Toyota Auto Body Co Ltd | Method and system for reducing residual quantity in transfer of viscous fluid |
| CN1987100A (en) * | 2006-12-12 | 2007-06-27 | 浙江大学 | Metering method and system for real time discharge volume of piston type concrete pump |
| CN101178061A (en) * | 2007-11-29 | 2008-05-14 | 浙江大学 | Concrete pump intelligent monitoring and control system |
| CN201486790U (en) * | 2009-08-10 | 2010-05-26 | 福田雷沃重机股份有限公司 | Pumping mechanism capable of changing strokes and pump vehicle provided therewith |
| CN202326064U (en) * | 2011-10-24 | 2012-07-11 | 中联重科股份有限公司 | Concrete pumping equipment and concrete pumping unit thereof |
| CN103410695A (en) * | 2012-06-08 | 2013-11-27 | 北汽福田汽车股份有限公司 | Pumping mechanism and pump truck provided with same |
| CN103114980A (en) * | 2012-06-27 | 2013-05-22 | 中联重科股份有限公司 | Pumping stroke control method of double-cylinder pump and pumping equipment |
| CN103114983A (en) * | 2012-06-27 | 2013-05-22 | 中联重科股份有限公司 | Pumping stroke control method of viscous material double-cylinder pump and viscous material pumping equipment |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112302914A (en) * | 2020-10-27 | 2021-02-02 | 浙江大学 | Bellows pump with stroke compensation function and stroke compensation method thereof |
| CN112302914B (en) * | 2020-10-27 | 2021-09-28 | 浙江大学 | Bellows pump with stroke compensation function and stroke compensation method thereof |
| CN114329956A (en) * | 2021-12-27 | 2022-04-12 | 重庆科技学院 | Horizontal well pumping perforation critical displacement control analysis method, system and terminal |
| CN114688004A (en) * | 2022-03-16 | 2022-07-01 | 三一重机有限公司 | Flow distribution method and device and working machine |
| CN114688004B (en) * | 2022-03-16 | 2023-10-27 | 三一重机有限公司 | Flow distribution method and device and working machine |
| CN118167713A (en) * | 2024-04-24 | 2024-06-11 | 华能酒泉发电有限公司 | Hydraulic oil station on-site adjustment control method based on manual operator |
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|---|---|
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