CN103591006B - A kind of pumping stroke optimal control method, system and engineering machinery - Google Patents
A kind of pumping stroke optimal control method, system and engineering machinery Download PDFInfo
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- CN103591006B CN103591006B CN201310578329.1A CN201310578329A CN103591006B CN 103591006 B CN103591006 B CN 103591006B CN 201310578329 A CN201310578329 A CN 201310578329A CN 103591006 B CN103591006 B CN 103591006B
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Abstract
The invention discloses a kind of pumping stroke optimal control method, system and engineering machinery.The method comprises: carry out at pumping unit, in the process of pumping, detecting the stroke of this oil cylinder piston when oil cylinder piston commutates; Determine to let out intensity in described pumping unit according to the stroke change of described oil cylinder piston at least one pump cycles; When detected oil cylinder piston stroke exceeds predetermined stroke range, determine the benefit draining intensity in each pump cycles according to letting out intensity in described; And carry out mending the stroke optimization control that draining is means to described pumping unit in described each pump cycles based on described benefit draining intensity, consume with described each pump cycles benefit draining effect being distributed to described pumping unit.Thus, overshoot, vibration, the phenomenon such as out of control can be avoided, avoid causing damage to equipment simultaneously, improve the working efficiency of system.
Description
Technical field
The present invention relates to engineering machinery field, particularly, relate to a kind of pumping stroke optimal control method, system and engineering machinery.
Background technique
Concrete pumping equipment is high pressure concrete conveying equipment, and pumping unit often occurs the situations such as hydraulic fluid leak when operation, causes oil cylinder operation stroke to change, and reduces working efficiency, even causes device damage.For this reason, need to carry out the optimization control of benefit draining to pumping unit, to improve equipment availability performance.
Existing benefit draining optimized control device mostly by detect oil cylinder piston commutate time travel position determine its commutate time the situation that puts in place, and the benefit draining state of communicated cavity is controlled in conjunction with the connectivity types of communicated cavity, and carry out the correction of mending draining control strategy in the situation of putting in place of upper once travel position, to realize stroke optimization control.But also there is certain blindness for the setting of mending draining intensity (may be embodied in and mend the draining control time) in this kind of controlling method, does not fully take into account the actual conditions of pumping system, to the bad adaptability of different operating mode.Often cause the problem such as overshoot, inefficacy due to control hysteresis.
Summary of the invention
The object of this invention is to provide a kind of pumping stroke optimal control method, system and engineering machinery, to realize the optimization control to pumping stroke.
To achieve these goals, the invention provides a kind of pumping stroke optimal control method, the method comprises: carry out at pumping unit, in the process of pumping, detecting the stroke of this oil cylinder piston when oil cylinder piston commutates; Determine to let out intensity in described pumping unit according to the stroke change of described oil cylinder piston at least one pump cycles; When detected oil cylinder piston stroke exceeds predetermined stroke range, determine the benefit draining intensity in each pump cycles according to letting out intensity in described; And carry out mending the stroke optimization control that draining is means to described pumping unit in described each pump cycles based on described benefit draining intensity, consume with described each pump cycles benefit draining effect being distributed to described pumping unit.
The present invention also provides a kind of pumping stroke Optimal Control System, and this system comprises: commutation sensors, exports commutation signal when commutating for the oil cylinder piston in pumping unit; Device for detecting distance of travel, for detecting the stroke of described oil cylinder piston when receiving described commutation signal; And control gear, for determining to let out intensity in described pumping unit according to the stroke change of described oil cylinder piston at least one pump cycles; When detected oil cylinder piston stroke exceeds predetermined stroke range, determine the benefit draining intensity in each pump cycles according to letting out intensity in described; And carry out mending the stroke optimization control that draining is means to described pumping unit in described each pump cycles based on described benefit draining intensity, consume with described each pump cycles benefit draining effect being distributed to described pumping unit.
The present invention also provides a kind of engineering machinery comprising said system.
In technique scheme, by the study of letting out intensity in pumping unit, the benefit draining intensity in each pump cycles can be determined, each pump cycles that benefit draining effect is distributed to pumping unit is consumed.In addition, suitable benefit draining intensity can be drawn according to letting out intensity in learning out, avoid excessive or too small cause overshoot, vibration, the phenomenon such as out of control, avoid causing damage to equipment simultaneously, while realizing optimization control accurately, improve the working efficiency of system.
Other features and advantages of the present invention are described in detail in embodiment part subsequently.
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and forms a part for specification, is used from explanation the present invention, but is not construed as limiting the invention with embodiment one below.In the accompanying drawings:
Fig. 1 is the structural drawing of pumping stroke Optimal Control System according to the embodiment of the present invention;
Fig. 2 is the example embodiment that device for detecting distance of travel detects the stroke of oil cylinder piston; And
Fig. 3 is the flow chart of pumping stroke optimal control method according to the embodiment of the present invention.
Description of reference numerals
10 commutation sensors 20 device for detecting distance of travel 30 control gear
201 first proximity switch 202 second proximity switch P oil cylinder piston R inductors
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.Should be understood that, embodiment described herein, only for instruction and explanation of the present invention, is not limited to the present invention.
Fig. 1 shows the structural drawing of pumping stroke Optimal Control System according to the embodiment of the present invention.As shown in Figure 1, this system can comprise: commutation sensors 10, exports commutation signal when commutating for the oil cylinder piston in pumping unit; Device for detecting distance of travel 20, for detecting the stroke of described oil cylinder piston when receiving described commutation signal; And control gear 30, for determining to let out intensity in described pumping unit according to the stroke change of described oil cylinder piston at least one pump cycles; When detected oil cylinder piston stroke exceeds predetermined stroke range, determine the benefit draining intensity in each pump cycles according to letting out intensity in described; And carry out mending the stroke optimization control that draining is means to described pumping unit in described each pump cycles based on described benefit draining intensity, consume with described each pump cycles benefit draining effect being distributed to described pumping unit.
Particularly, control gear 30 can receive the oil cylinder piston stroke signal that device for detecting distance of travel 20 detects.Suppose for two pump cycles, if oil cylinder piston stroke detected after two pump cycles changes, how many oil masses have been let out (namely in described pumping unit during control gear 30 just can determine each pump cycles according to the change of this one stroke and pump cycles number (being 2 in this example), inside let out intensity), this process lets out intensity learning process in can being called as.
Under normal circumstances, (namely the stroke of oil cylinder piston has an ideal range, predetermined stroke range), thus, control gear 30 can exceed predetermined stroke range at detected oil cylinder piston stroke, should to pumping unit implementing great benefit draining intensity in future in each pump cycles according to letting out intensity to determine in the pumping unit determined before, then in described each pump cycles, the optimization control of benefit draining being carried out to described pumping unit based on determined benefit draining intensity.Wherein, the described benefit draining intensity benefit draining that can be characterized by the unit time controls flow and mends the draining control time.
Thus, each pump cycles that benefit draining effect can be distributed to pumping unit consumes.In addition, can draw mend draining intensity accurately according to letting out intensity in learning out, avoid excessive or too small cause overshoot, vibration, the phenomenon such as out of control, avoid causing damage to equipment simultaneously, while realizing optimization control accurately, improve the working efficiency of system.
Different benefit draining systems has different benefit draining control abilities, when carrying out the optimization control of benefit draining to pumping unit, should take into full account the benefit draining control ability of mending draining system.
Pumping stroke Optimal Control System provided by the invention is before carrying out the optimization control of benefit draining to pumping unit, first determine the benefit draining control ability of mending draining system by study, then comprehensively mend in draining control ability and pumping unit and let out the benefit draining intensity that intensity determines each pump cycles jointly.
Particularly, control gear 30 can when described pumping unit carry out pumping, carries out concentrated repairing or draining to determine to mend draining control ability (this process can be known as and mend draining control ability learning process) to described pumping unit; And according to described benefit draining control ability and described in let out intensity and determine described benefit draining intensity.
As mentioned above, oil cylinder piston has a predetermined desirable stroke range.Described stroke range can comprise two borders, i.e. the first stroke and the second stroke.Described benefit draining control ability can carry out concentrated repairing or draining to make described oil cylinder piston move to from described first stroke time that described second stroke experiences and to be determined based on when described pumping unit does not carry out pumping to described pumping unit.And described in let out intensity and can to change to from described second stroke based on the oil cylinder piston stroke detected when described pumping unit carries out pumping and exceed pump cycles number that described first stroke experiences and determined.
That is, before pumping unit starts pumping, control gear 30 can according to the connectivity types of the oil cylinder of pumping unit, decide to take concentrated repairing or draining, to make described oil cylinder piston from one (such as, the first stroke) motion two borders (preferably, uniform motion) to another one (such as, second stroke), then record the time T1 that this process experiences, described benefit draining control ability can be determined.Afterwards, pumping unit starts pumping, and the pumping now carried out is not by the pumping of optimization control.Position after the initial position of oil cylinder piston carries out concentrated repairing or draining before can being during beginning pumping residing for described oil cylinder piston, such as, the second stroke.In pumping procedure, device for detecting distance of travel 20, when receiving the commutation signal that commutation sensors 10 exports, detects the stroke of oil cylinder piston.When detected oil cylinder piston stroke from described second stroke change to exceed described first stroke (that is, exceeding described predetermined stroke range) when, the time T2 that this process experiences recorded by control gear 30.Alternatively, owing to being the stroke detecting oil cylinder piston when commutating, therefore, time T2 is the multiple of pump cycles, control gear 30 also can record pump cycles number N said process occurring and experiences, and then based on the time T needed for every pump cycles, also can draw the time T2 that this process experiences, wherein, T2=T*N.Thus, control gear 30 just can be determined in pumping unit and let out intensity.
Described control gear 30 can determine described benefit draining control time Tc based on following formula:
P × Tc=k × 100% × T1 equation (1)
Wherein, k is for mending draining strength coefficient, and k=1/N, and p is the circulation ratio of mending draining control valve.Such as, when mending the circulation status of draining control valve with 100% and working, p=100%, and when the circulation status with 50% works, p=50%.When p=100%, above-mentioned equation (1) can be reduced to: Tc=k × T1=T1/N=T1 × T × (1/T2).
After determining described benefit draining control time Tc, control gear 30 can carry out the optimization control of benefit draining according to above-mentioned benefit draining control time Tc during each pump cycles afterwards.
Thus, in Optimal Control System provided by the invention, take into full account the benefit draining control ability of mending draining system, and in conjunction with the benefit draining intensity of letting out intensity in pumping unit and determining in each pump cycles, benefit draining control ability can be evenly distributed to each pump cycles thus to realize, prevent the problem such as overshoot, imbalance.Only need limited step just can realize comprehensive control of stroke optimization, instead of continue to monitor in real time and adjust, thus decrease the cost of system operations and control.Also without the need to consuming a large amount of stand-by period in optimization control process, thus improve the working efficiency of system.In addition, for different pumping units and different benefit draining systems, can be drawn accordingly by study and let out intensity and mend draining control ability, then corresponding benefit draining intensity is determined, to carry out the optimization control of benefit draining, thus, pumping stroke Optimal Control System provided by the invention has good applicability.
In addition, described control gear 30 can also exceed described stroke range at detected stroke, control described pumping unit and suspend pumping; And before the optimization control of benefit draining is carried out to described pumping unit, concentrated repairing is carried out to described pumping unit or draining arrives within described stroke range to make described oil cylinder piston; Control described pumping unit afterwards again and recover pumping.
That is, let out intensity in determining after, according to above-mentioned example, now oil cylinder piston be positioned at exceed described first stroke position (namely, to exceed described stroke range away from the direction of the second stroke), first control gear 30 controls described pumping unit and suspends pumping.Then concentrated repairing is carried out to described pumping unit or draining arrives within described stroke range to make described oil cylinder piston, preferably, arrive the second travel position place.Afterwards, then control described pumping unit recovery pumping, now, the pumping after recovery is the pumping by mending draining optimization control.Thus, can make in whole pumping procedure, oil cylinder piston is within desirable stroke range all the time.
In addition, described device for detecting distance of travel 20 during described control gear 30 carries out the optimization control of benefit draining to described pumping unit, can also detect the stroke of described oil cylinder piston when receiving described commutation signal; And described control gear 30 is also for changing at the stroke of at least one pump cycles according to oil cylinder piston described in this period, redefines in described pumping unit and lets out intensity.
Such as, carrying out in the pumping procedure by optimization control, if oil cylinder piston exceeds described stroke range again, then control gear 30 can redefine in described pumping unit according to the pump cycles number experienced in this process or time T3 and let out intensity.It should be noted that in now redefining out let out intensity pumping unit when being attended by above-mentioned optimization control in let out intensity, also can be called as in compound and let out intensity.Let out intensity in relearning after, described control gear 30 can let out intensity in mending draining control ability and relearning, to redefine during each pump cycles afterwards the required benefit draining control time, as shown in following equation (suppose benefit draining control valve with 100% circulation status work):
Tc=T1*T*(1/T2+1/T3) equation (2)
So analogize, control gear 30 in the manner described above when each oil cylinder piston exceeds default stroke range, can let out intensity in relearning, and thus, the benefit draining control time redefined can be expressed as:
Tc=T1*T*(1/T2+1/T3+ ...) equation (3)
If T2(and T3 afterwards ...) >>T1, like this, the benefit draining control time Tc calculated may be very little, causes the more difficult realization of control accuracy like this.To this, the benefit draining control time can be increased to calculated benefit draining control time Tc 2 times (or n doubly) by control gear 30, then the benefit draining of unit time is controlled flow and is contracted to original 1/2(or 1/n).This can pass through p value to be adjusted to 50%(or 1/n%) realize.Thus, ensure that overall benefit dredge oil amount is constant in unit pump cycles, can improve control accuracy.
Device for detecting distance of travel 20 has multiple implementation, and such as, it can be range sensor, proximity switch etc.A kind of example embodiment of device for detecting distance of travel 20 is described below in conjunction with Fig. 2.
As shown in Figure 2, device for detecting distance of travel 20 can comprise the first proximity switch 201 and the second proximity switch 202, two proximity switch homonymies and be staggered front to back placement, and the intended distance between it is based on the desirable stroke range of oil cylinder piston P.When commutation sensors 10 exports commutation signal, carried out the inductor R on induction piston bar by the first proximity switch 201 and the second proximity switch 202, to judge the situation that puts in place of oil cylinder piston P.Such as, the second proximity switch 202 is not triggered when the first proximity switch 201 is triggered, judge that oil cylinder piston P puts in place (that is, being within desirable stroke range); When the first proximity switch 201 and the second proximity switch 202 are not all triggered, judge that oil cylinder piston P does not put in place; And when the first proximity switch 201 and the second proximity switch 202 are all triggered, judge that oil cylinder piston P crosses and put in place.After the situation that puts in place drawing oil cylinder piston, the fluid that can judge in communicated cavity according to the connectivity types of the oil cylinder of pumping unit is too much or very few, determines to take repairing or draining control with this.
When adopting device for detecting distance of travel 20 of this type, the triggering of the first proximity switch 201 and the second proximity switch 202 can be let out in determining described benefit draining control ability and be described the foundation of intensity.Such as, as mentioned above, described benefit draining control ability can carry out concentrated repairing or draining to make described oil cylinder piston move to from described first stroke time that described second stroke experiences and to be determined based on when described pumping unit does not carry out pumping to described pumping unit.And described in let out intensity and can to change to from described second stroke based on the oil cylinder piston stroke detected when described pumping unit carries out pumping and exceed pump cycles number that described first stroke experiences and determined.Suppose corresponding first proximity switch 201 of the first stroke, and corresponding second proximity switch 202 of the second stroke, thus, control gear 30 can when carrying out concentrated repairing or draining, starting point is triggered with the first proximity switch 201, be not triggered terminal with the second proximity switch 202, the time experienced during then recording this, determine thus to mend draining control ability.And when determining to let out intensity in pumping unit, can the first proximity switch 201 by again trigger be used as judging that oil cylinder piston stroke exceeds the foundation outside the first stroke, the pump cycles number that control gear 30 experiences during can recording this or time, determine thus to let out intensity in pumping unit.
Fig. 3 shows pumping stroke optimal control method according to the embodiment of the present invention.As shown in Figure 3, the method can comprise: step S302, carries out, in the process of pumping, detecting the stroke of this oil cylinder piston when oil cylinder piston commutates at pumping unit; Step S303, determines to let out intensity in described pumping unit according to the stroke change of described oil cylinder piston at least one pump cycles; Step S304, whether the oil cylinder piston stroke detected by judgement exceeds predetermined stroke range.When detected oil cylinder piston stroke exceeds predetermined stroke range, step S306, determines the benefit draining intensity in each pump cycles according to letting out intensity in described; And step S309, carry out mending the stroke optimization control that draining is means to described pumping unit based on described benefit draining intensity in described each pump cycles, consume with described each pump cycles benefit draining effect being distributed to described pumping unit.
Described method can also comprise: step S301, when described pumping unit does not carry out pumping, carries out concentrated repairing or draining to determine to mend draining control ability to described pumping unit; And according to described benefit draining control ability and described in let out intensity and determine described benefit draining intensity.
Wherein, described stroke range can comprise the first stroke and the second stroke, and described benefit draining control ability can carry out concentrated repairing or draining to make described oil cylinder piston move to from described first stroke time that described second stroke experiences and to be determined based on when described pumping unit does not carry out pumping to described pumping unit; And described in let out intensity and can to change to from described second stroke based on the oil cylinder piston stroke detected when described pumping unit carries out pumping and exceed pump cycles number that described first stroke experiences and determined.
Described benefit draining intensity can be characterized by mends the draining control time, and this benefit draining control time can be determined based on following:
p×Tc=k×100%×T1
Wherein, Tc is the described benefit draining control time, T1 is when described pumping unit does not carry out pumping, concentrated repairing or draining are carried out to described pumping unit and moves to from described first stroke the time that described second stroke experiences to make described oil cylinder piston, k is for mending draining strength coefficient, k=1/N, N is when described pumping unit carries out pumping, detected oil cylinder piston stroke changes to the pump cycles number exceeding described first stroke and experience from described second stroke, and p is the circulation ratio of mending draining control valve.
Described method can also comprise: when detected stroke exceeds described stroke range, step S305, and described pumping unit suspends pumping; And before benefit draining optimization control (step S309) is carried out to described pumping unit: step S307, carries out concentrated repairing to described pumping unit or draining arrives within described stroke range to make described oil cylinder piston; And step S308, described pumping unit recovers pumping.
Described method can also comprise: during carrying out the optimization control of benefit draining to described pumping unit, detects the stroke of this oil cylinder piston when described oil cylinder piston commutation; And change according to the stroke of oil cylinder piston described in this period at least one pump cycles, redefine in described pumping unit and let out intensity.
In technique scheme, by the study of letting out intensity in pumping unit, the benefit draining intensity in each pump cycles can be determined, each pump cycles that benefit draining effect is distributed to pumping unit is consumed.In addition, suitable benefit draining intensity can be drawn according to letting out intensity in learning out, avoid excessive or too small cause overshoot, vibration, the phenomenon such as out of control, avoid causing damage to equipment simultaneously, while realizing optimization control accurately, improve the working efficiency of system.
Below the preferred embodiment of the present invention is described in detail by reference to the accompanying drawings; but; the present invention is not limited to the detail in above-mentioned mode of execution; within the scope of technical conceive of the present invention; can carry out multiple simple variant to technological scheme of the present invention, these simple variant all belong to protection scope of the present invention.
It should be noted that in addition, each the concrete technical characteristics described in above-mentioned embodiment, in reconcilable situation, can be combined by any suitable mode.In order to avoid unnecessary repetition, the present invention illustrates no longer separately to various possible compound mode.
In addition, also can carry out combination in any between various different mode of execution of the present invention, as long as it is without prejudice to thought of the present invention, it should be considered as content disclosed in this invention equally.
Claims (13)
1. a pumping stroke optimal control method, is characterized in that, the method comprises:
Carry out at pumping unit, in the process of pumping, detecting the stroke of this oil cylinder piston when oil cylinder piston commutates;
Determine to let out intensity in described pumping unit according to the stroke change of described oil cylinder piston at least one pump cycles;
When detected oil cylinder piston stroke exceeds predetermined stroke range, determine the benefit draining intensity in each pump cycles according to letting out intensity in described; And
Carry out mending the stroke optimization control that draining is means to described pumping unit based on described benefit draining intensity in described each pump cycles, consume with described each pump cycles benefit draining effect being distributed to described pumping unit.
2. method according to claim 1, is characterized in that, the method also comprises:
When described pumping unit does not carry out pumping, concentrated repairing or draining are carried out to determine to mend draining control ability to described pumping unit; And
According to described benefit draining control ability and described in let out intensity and determine described benefit draining intensity.
3. method according to claim 2, wherein, described stroke range comprises the first stroke and the second stroke, it is characterized in that,
Described benefit draining control ability carries out concentrated repairing or draining to make described oil cylinder piston move to from described first stroke time that described second stroke experiences and to be determined based on when described pumping unit does not carry out pumping to described pumping unit; And
Let out intensity in described to change to from described second stroke based on the oil cylinder piston stroke detected when described pumping unit carries out pumping and exceed pump cycles number that described first stroke experiences and determined.
4. method according to claim 3, is characterized in that, described benefit draining intensity is characterized by mends the draining control time, and this benefit draining control time is determined based on following:
p×Tc=k×100%×T1
Wherein, Tc is the described benefit draining control time, T1 is when described pumping unit does not carry out pumping, concentrated repairing or draining are carried out to described pumping unit and moves to from described first stroke the time that described second stroke experiences to make described oil cylinder piston, k is for mending draining strength coefficient, k=1/N, N is when described pumping unit carries out pumping, detected oil cylinder piston stroke changes to the pump cycles number exceeding described first stroke and experience from described second stroke, and p is the circulation ratio of mending draining control valve.
5. method according to claim 1, is characterized in that, the method also comprises:
When detected stroke exceeds described stroke range, described pumping unit suspends pumping; And
Before the optimization control of benefit draining is carried out to described pumping unit:
Concentrated repairing is carried out to described pumping unit or draining arrives within described stroke range to make described oil cylinder piston;
Described pumping unit recovers pumping.
6. the method according to claim arbitrary in claim 1-5, it is characterized in that, the method also comprises:
During the optimization control of benefit draining is carried out to described pumping unit, detect the stroke of this oil cylinder piston when described oil cylinder piston commutation; And
Change according to the stroke of oil cylinder piston described in this period at least one pump cycles, redefine in described pumping unit and let out intensity.
7. a pumping stroke Optimal Control System, is characterized in that, this system comprises:
Commutation sensors, exports commutation signal when commutating for the oil cylinder piston in pumping unit;
Device for detecting distance of travel, for detecting the stroke of described oil cylinder piston when receiving described commutation signal; And
Control gear, for:
Determine to let out intensity in described pumping unit according to the stroke change of described oil cylinder piston at least one pump cycles;
When detected oil cylinder piston stroke exceeds predetermined stroke range, determine the benefit draining intensity in each pump cycles according to letting out intensity in described; And
Carry out mending the stroke optimization control that draining is means to described pumping unit based on described benefit draining intensity in described each pump cycles, consume with described each pump cycles benefit draining effect being distributed to described pumping unit.
8. system according to claim 7, is characterized in that, described control gear also for:
When described pumping unit does not carry out pumping, concentrated repairing or draining are carried out to determine to mend draining control ability to described pumping unit; And
According to described benefit draining control ability and described in let out intensity and determine described benefit draining intensity.
9. system according to claim 8, wherein, described stroke range comprises the first stroke and the second stroke, it is characterized in that,
Described benefit draining control ability carries out concentrated repairing or draining to make described oil cylinder piston move to from described first stroke time that described second stroke experiences and to be determined based on when described pumping unit does not carry out pumping to described pumping unit; And
Let out intensity in described to change to from described second stroke based on the oil cylinder piston stroke detected when described pumping unit carries out pumping and exceed pump cycles number that described first stroke experiences and determined.
10. system according to claim 9, is characterized in that, described benefit draining intensity is characterized by mends the draining control time, and described control gear determines the described benefit draining control time based on following:
p×Tc=k×100%×T1
Wherein, Tc is the described benefit draining control time, T1 is when described pumping unit does not carry out pumping, concentrated repairing or draining are carried out to described pumping unit and moves to from described first stroke the time that described second stroke experiences to make described oil cylinder piston, k is for mending draining strength coefficient, k=1/N, N is when described pumping unit carries out pumping, detected oil cylinder piston stroke changes to the pump cycles number exceeding described first stroke and experience from described second stroke, and p is the circulation ratio of mending draining control valve.
11. systems according to claim 7, is characterized in that, described control gear also for:
When detected stroke exceeds described stroke range, control described pumping unit and suspend pumping; And
Before the optimization control of benefit draining is carried out to described pumping unit:
Concentrated repairing is carried out to described pumping unit or draining arrives within described stroke range to make described oil cylinder piston;
Control described pumping unit and recover pumping.
12. systems according to claim arbitrary in claim 7-11, is characterized in that,
Described device for detecting distance of travel also for during carrying out the optimization control of benefit draining at described control gear to described pumping unit, detects the stroke of described oil cylinder piston when receiving described commutation signal; And
Described control gear also for changing at the stroke of at least one pump cycles according to oil cylinder piston described in this period, redefining in described pumping unit and letting out intensity.
13. the engineering machinery comprising the system in claim 7-12 described in arbitrary claim.
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| CN105840587B (en) * | 2015-01-12 | 2018-01-02 | 中联重科股份有限公司 | A kind of pumping installations mends draining control device, system, method and engineering machinery |
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| KR100663320B1 (en) * | 2005-05-25 | 2007-01-02 | 주식회사 한우티엔씨 | Hydraulic cylinder stroke corrector in concrete pump system |
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| DE3834678A1 (en) * | 1988-10-12 | 1990-04-19 | Putzmeister Maschf | METHOD AND DEVICE FOR CORRECTING THE PISTON STROKE IN THE CYLINDERS OF A TWO-CYLINDER FUEL PUMP |
| CN2861580Y (en) * | 2005-10-31 | 2007-01-24 | 三一重工股份有限公司 | Valve make-up device used for series hydraulic cylinder |
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| CN103591006A (en) | 2014-02-19 |
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