CN102635137A - Total power control system of mechanical equipment - Google Patents

Total power control system of mechanical equipment Download PDF

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Publication number
CN102635137A
CN102635137A CN2011100364540A CN201110036454A CN102635137A CN 102635137 A CN102635137 A CN 102635137A CN 2011100364540 A CN2011100364540 A CN 2011100364540A CN 201110036454 A CN201110036454 A CN 201110036454A CN 102635137 A CN102635137 A CN 102635137A
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China
Prior art keywords
power
control
pressure
plant equipment
main
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Pending
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CN2011100364540A
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Chinese (zh)
Inventor
王志华
王宝喜
刘华富
顾波
胡明
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SHANGHAI PAL-FIN AUTO CONTROL TECHNOLOGY Co Ltd
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SHANGHAI PAL-FIN AUTO CONTROL TECHNOLOGY Co Ltd
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Priority to CN2011100364540A priority Critical patent/CN102635137A/en
Publication of CN102635137A publication Critical patent/CN102635137A/en
Pending legal-status Critical Current

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Abstract

The invention provides a total power control system of mechanical equipment, which comprises a detection unit, two main pump pressure sensors, an engine working parameter acquisition unit, two electric proportional pressure-reducing valves and a control unit, wherein the control unit is mutually connected with the detection unit, the two main pump pressure sensors, the engine working parameter acquisition unit and the two electric proportional pressure-reducing valves and is used for calculating the power of two main pumps according to two main pump control pressure signals sensed by the detection unit and the pressure of the outlets of the two main pumps, which is detected by the two main pump pressure sensors; when the power of the corresponding pump is greater than engine output power, the displacement of the two pumps can be reduced by the control unit, whereas the power of the corresponding pump is less than the engine output power, the engine speed can be automatically reduced by the control unit to control an engine to output according to the demanded power of the corresponding pump, i.e. the goal that the power is output as needed is achieved, thereby, energy saving is realized.

Description

The full power control system of plant equipment
Technical field
The present invention relates to a kind of control field of plant equipment, particularly a kind of full power control system of plant equipment.
Background technology
In recent years, along with China's rapid development of economy, excavator was widely used in engineering construction, rescue, building, municipal administration, farmland, water conservancy etc., and every profession and trade is also increasingly high to the energy-conservation requirement of excavator.
For realizing the Energy Saving Control of excavator; Generally adopt control of hydraulic pressure minus flow and electronics rotating speed induction control technology both at home and abroad; These technology had once reduced the oil consumption of hydraulic crawler excavator significantly, but because the operating load of excavator own is changeable, caused diesel engine substantial deviation economic work district; Cause fuel utilization ratio not high, especially under the situation of high rotating speed, little load.The situation of changing load has determined under traditional control technology, to be difficult to further improve energy-saving effect.
Minus flow excavator control system Principles of Regulation are: the pressure before the control valve speed control muffler is caused the pumpage governor motion; Big more through the throttle orifice flow; Then pilot pressure is big more before the restriction; Explain that the flow that pump provides is not used by load fully, but oil sump tank, so pumpage is more little.The controlled pressure (minus flow feedback pressure) that is the pump stroking mechanism is inverse ratio with pumpage, and is as shown in Figure 1.
As shown in Figure 2, said minus flow excavator control system comprises: moment of torsion proportioning valve 11, permanent PCU Power Conditioning Unit 12 and minus flow adjusting device 13, it is used to control two main pumps of excavator, i.e. front pump and back pump.Said control system compares actual engine speed and rotating speed of target, falls fast situation according to motor, through regulating moment of torsion proportioning valve 11 electric currents; The maximum absorption torque of restrictive pump; Change pump delivery indirectly, thus the absorbed power of adjustment pump, the power match of realization pump and motor.
The major defect of above-mentioned minus flow excavator control system has:
(1). the discharge capacity of two main pumps can not independent regulation;
(2). can't realize that intelligent pressure cuts off function (wheel cylinder pressure cut off, variable pressure cut off), spill losses is bigger;
(3). the negative pressure signal that is used to feed back is the unnecessary pressure loss;
(4). regulate the method underaction of pump absorbed power and discharge capacity through the moment of torsion electromagnetic valve;
(5). according to present control mode, system does not have more potentiality can dig, and becomes the bottleneck of performance of further lifting excavator.
Summary of the invention
The object of the present invention is to provide a kind of full power control system of plant equipment, with the operating efficiency of the double pump that improves plant equipment, and effective energy conservation.
Reach other purposes in order to achieve the above object, the full power control system of plant equipment provided by the invention comprises: detecting unit is used for the control pressure signal that the said plant equipment operating personnel of sensing send to two main pumps; Two main pump pressure sensors are used to detect the pressure that said two main pumps export; The engine operating parameter acquiring unit is arranged in the engine operation loop of said plant equipment, is used to obtain the power output and the rotating speed of said motor; Be separately positioned on two electric proportional pressure-reducing valves of the controlled pressure mouth of two main pumps of plant equipment; And control module; Be connected with said detecting unit, two pressure sensors, engine operating parameter acquiring unit and two electric proportional pressure-reducing valves; The power that is used for said two main pumps of calculation of pressure of two main pumps outlets that two main pump control pressure signal, said two main pump pressure sensors according to said detecting unit institute sensing are detected; And based on the power output of said motor and rotating speed output control signal corresponding to said two electric proportional pressure-reducing valves, to realize control to said two main pump power.
In sum; The full power control system of plant equipment of the present invention respectively increases an electric proportional pressure-reducing valve through the controlled pressure mouth at two main pumps and comes the discharge capacity of two main pumps is controlled, and has solved the problem of two pumpage independent regulation in the existing minus flow control system thus; And when pump absorbed power during greater than engine output, control module can reduce by two pump deliveries; And when pump absorbed power during less than engine output; Control module can reduce engine speed automatically, and the control motor is exported according to the demand power of pump, promptly realizes " what being used; what are given ", realizes energy-conservation thus.
Description of drawings
Fig. 1 is existing hydraulic pressure minus flow control system schematic.
Fig. 2 is existing hydraulic pressure minus flow pump schematic diagram.
Fig. 3 is the full power control system sketch map of plant equipment of the present invention.
Fig. 4 is the full power control system embodiment sketch map of plant equipment of the present invention.
Fig. 5 is the workflow diagram of the full power control system of plant equipment of the present invention.
Fig. 6 is applied to have the sketch map in the plant equipment of hydraulic pressure minus flow control system for the full power control system of plant equipment of the present invention.
The specific embodiment
Below will combine accompanying drawing that the full power control system of plant equipment of the present invention is elaborated.
Need to prove that the plant equipment that full power control system of the present invention can be applicable to includes but not limited to: excavator, loader, land leveller, crane, rotary drilling rig, concrete mixer or the like.
See also Fig. 3, the full power control system of plant equipment of the present invention comprises: detecting unit, two main pump pressure sensors, engine operating parameter acquiring unit, two electric proportional pressure-reducing valves and control module.
Said detecting unit is used for the control pressure signal that the said plant equipment operating personnel of sensing send to two main pumps.If said plant equipment is provided with minus flow feedback hydraulic loop choke valve; Then as a kind of optimal way; Detecting unit can adopt two minus flow pressure sensors, and each minus flow pressure sensor can be provided with respect to a minus flow feedback hydraulic loop choke valve, with the pressure signal before the choke valve of the corresponding minus flow feedback hydraulic of sensing loop; The relation that can be inversely proportional to according to handle stroke and minus flow pressure signal is confirmed the demand of user to machine speed.As shown in Figure 4, minus flow pressure sensor 21 (the minus flow pressure sensor figure of another one pump does not show) is provided with respect to minus flow feedback hydraulic loop choke valve.
In addition; Said detecting unit can be used for the manipulation pressure in the said handle guide of sensing loop, for example respectively with respect to the operating grip setting of said plant equipment; Directly the manipulation pressure with handle guide loop compares, and gets and handles the pressure sum as control pressure signal.
In addition, the setting that it should be appreciated by those skilled in the art that said detecting unit is not with the above-mentioned limit that is depicted as.
Said two main pump pressure sensors are used to detect the pressure of two main pump outlets.As shown in Figure 4, main pump pressure sensor 22 (another one main pump pressure sensor figure does not show) is arranged on plant equipment, for example the output pressure mouth of excavator main pump.
Said engine operating parameter acquiring unit is arranged in the engine operation loop of said plant equipment, is used to obtain the power output and the rotating speed of said motor.For example, said engine operating parameter acquiring unit can comprise throttle actuator, and its feedback position according to throttle actuator can obtain power output and the rotating speed that starts function to provide.In addition, said engine operating parameter acquiring unit also can comprise engine speed sensor, is used for actual speed of sensing motor or the like.
It should be appreciated by those skilled in the art that the mode that said engine operating parameter acquiring unit obtains the running parameter of motor is not to exceed with said.
Said two electric proportional pressure-reducing valves are separately positioned on the controlled pressure mouth of two main pumps of plant equipment.As shown in Figure 4, electric proportional pressure-reducing valve 23 (another one electricity proportional pressure-reducing valve figure does not show) is arranged on plant equipment, for example the discharge capacity controlled pressure mouth of excavator main pump.
Said control module 24 is connected with said detecting unit, two main pump pressure sensors, engine operating parameter acquiring unit and two electric proportional pressure-reducing valves; The power that is used for said two main pumps of calculation of pressure of two main pumps outlets that two main pump control pressure signal, said two main pump pressure sensors according to said detecting unit institute sensing are detected; And based on the power output of said motor and rotating speed output control signal corresponding to said two electric proportional pressure-reducing valves, to realize control to said two main pump power.
The course of work of the full power control system of above-mentioned plant equipment is as shown in Figure 5, at first, and by the control pressure signal P of detecting unit according to two minus flow pressure sensor senses, two pumps Ctr1And P Ctr2, detect pressure P 1 and the P2 that two main pumps export by two main pump pressure sensors, subsequently, control module 24 is according to control pressure signal P Ctr1And P Ctr2And the pressure P 1 of two main pump pressure port calculates two pump power W with P2 PumpThen with the demand power W of pump PumpWith the power output W that can provide motor at this moment MotorCompare, result relatively has following three kinds of situation:
(1), W Pump>W Motor
Show that promptly the demand power of pump exceeds the power output of motor, for avoiding motor because of overload stall even flame-out, control module can be with two pump delivery q 1, q 2Reduce.Subsequently, the electric proportional pressure-reducing valve that control module is scheduled to through inquiry is controlled the correspondence table of electric current and pumpage, can draw actual electric proportional pressure-reducing valve control electric current I 1, I 2, thus, output corresponding control current I 1, I 2To two electric proportional pressure-reducing valves to control two pumpages.
(2), W Pump<W Motor
Show that the engine output of this moment exceeds the power of pump, control module can make engine output set according to the power of pump according to the thought of " what are used, what are given ", and tabling look-up draws W Motor '=W PumpThe time corresponding engine speed N ' (N '<N) as the new setting rotating speed of motor, calculate corresponding discharge capacity q according to engine speed again 1 ', q 2 ', make two pump works under big discharge capacity, efficient is higher, and can effectively reduce engine scuffing and noise, through inquiring about the predetermined electric proportional pressure-reducing valve control electric current and the correspondence table of pumpage, can draw actual electric proportional pressure-reducing valve control electric current I 1 ', I 2 ', thus, output corresponding control current I 1 ', I 2 'To two electric proportional pressure-reducing valves, engine speed is to N ' simultaneously.
(3), W Pump=W Motor
Show that the power output of motor this moment just in time satisfies the demand of hydraulic system.Calculate two corresponding pump delivery q according to the present engine rotational speed N 1 ", q 1 ",, can draw actual electric proportional pressure-reducing valve control electric current I through inquiring about the predetermined electric proportional pressure-reducing valve control electric current and the correspondence table of pumpage 1 ", I 2 ", thus, output corresponding control current I 1 ", I 2 "To two electric proportional pressure-reducing valves to control two pumpages.
In sum, the full power control system of plant equipment of the present invention is compared with existing minus flow control system, and main advantage is:
(1). realize the independent regulation of double pump discharge capacity, regulated flexibly, improved the operating efficiency of pump.
(2). can realize the pressure cut off of intelligent alterable, system pressure is controlled under the cut-out pressure value of setting, reduce the draining loss of overflow valve.
(3). engine speed is regulated according to user's operational requirements automatically.
(4). pump often is operated in big discharge capacity, and efficient is high.
(5). the real realization " with what, what are given ", excavator more efficiently, more energy-conservation.
The foregoing description is just listed expressivity principle of the present invention and effect is described, but not is used to limit the present invention.Any personnel that are familiar with this technology all can make amendment to the foregoing description under spirit of the present invention and scope.Therefore, rights protection scope of the present invention should be listed like claims.

Claims (7)

1. the full power control system of a plant equipment, wherein, said plant equipment has two main pumps, it is characterized in that comprising:
Detecting unit is used for the control pressure signal that the said plant equipment operating personnel of sensing send to two main pumps;
Two main pump pressure sensors are used to detect the pressure that said two main pumps export;
The engine operating parameter acquiring unit is arranged in the engine operation loop of said plant equipment, is used to obtain the power output and the rotating speed of said motor;
Be separately positioned on two electric proportional pressure-reducing valves of the controlled pressure mouth of two main pumps of plant equipment;
Control module; Be connected with said detecting unit, two main pump pressure sensors, engine operating parameter acquiring unit and two electric proportional pressure-reducing valves; The power that is used for said two main pumps of calculation of pressure of two main pumps outlets that two main pump control pressure signal, said two main pump pressure sensors according to said detecting unit institute sensing are detected; And based on the power output of said motor and rotating speed output control signal corresponding to said two electric proportional pressure-reducing valves, to realize control to said two main pump power.
2. the full power control system of plant equipment as claimed in claim 1; It is characterized in that: when said plant equipment is provided with minus flow feedback hydraulic loop choke valve; Then said detecting unit is provided with respect to minus flow feedback hydraulic loop choke valve, with the pressure signal before the choke valve of the corresponding minus flow feedback hydraulic of sensing loop.
3. the full power control system of plant equipment as claimed in claim 1, it is characterized in that: said detecting unit is used for the manipulation pressure in the said handle guide of sensing loop with respect to the operating grip setting of said plant equipment.
4. the full power control system of plant equipment as claimed in claim 1; It is characterized in that: said control module also is used for when the power of said two main pumps surpasses the power output of said motor; Again confirm said two main pumps power separately; So that the power after confirming again need equal the power output of said motor; And based on the said power of confirming again and the electric proportional pressure-reducing valve control electric current of being scheduled to and the corresponding relation of pumpage, to two electric proportional pressure-reducing valves output corresponding control current signals.
5. the full power control system of plant equipment as claimed in claim 1; It is characterized in that: said control module also is used for when the power of said two main pumps during less than the power output of said motor; Again confirm the rotating speed of said motor; And confirm the power of said two main pumps based on determined rotating speed, so that to two electric proportional pressure-reducing valves output corresponding control current signals.
6. the full power control system of plant equipment as claimed in claim 1; It is characterized in that: said control module also is used for when the power of said two main pumps equals the power output of said motor; Confirm the power of said two main pumps based on the current rotating speed of said motor, so that export the corresponding control current signals to two electric proportional pressure-reducing valves.
7. like the full power control system of each described plant equipment of claim 1 to 6, it is characterized in that: said plant equipment comprises: excavator, loader, land leveller, crane, rotary drilling rig, concrete mixer.
CN2011100364540A 2011-02-12 2011-02-12 Total power control system of mechanical equipment Pending CN102635137A (en)

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Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102996536A (en) * 2012-11-27 2013-03-27 三一重工股份有限公司 Load sensitive hydraulic system and power controller thereof as well as crane
CN103061738A (en) * 2012-12-28 2013-04-24 三一重工股份有限公司 Rotary drilling rig and auxiliary construction system and method thereof
CN103615029A (en) * 2013-11-01 2014-03-05 中外合资沃得重工(中国)有限公司 Power control system and method of negative flow hydraulic pump of middle-large size hydraulic excavator
CN104003305A (en) * 2014-05-26 2014-08-27 徐工集团工程机械股份有限公司 Matching method and device of crane pump control system threshold power
CN104295423A (en) * 2014-10-10 2015-01-21 中国神华能源股份有限公司 Fuel pump oil supply method and system
CN104373332A (en) * 2014-10-28 2015-02-25 浙江三一装备有限公司 Main pump power control system and method and engineering machine
CN104405707A (en) * 2014-10-21 2015-03-11 恒天创丰重工有限公司 Multi-pump hydraulic system and power control method thereof
CN104405003A (en) * 2014-10-28 2015-03-11 上海华兴数字科技有限公司 Pump and valve synchronous control system
CN104832298A (en) * 2015-03-17 2015-08-12 北京市三一重机有限公司 Engine gear control system and rotary drilling rig
CN104963374A (en) * 2015-06-12 2015-10-07 广西柳工机械股份有限公司 Method for automatically controlling working modes of excavator
CN105221278A (en) * 2015-10-23 2016-01-06 长安大学 Based on the rotary drilling rig control system of global power coupling
CN105421521A (en) * 2015-11-11 2016-03-23 潍柴动力股份有限公司 Flameout-preventing control method and system for excavator
CN105502191A (en) * 2015-12-16 2016-04-20 徐州燕大传动与控制技术有限公司 Main pump displacement control method in main windlass confluence hoisting process of rotary drilling rig
CN106542450A (en) * 2016-03-02 2017-03-29 徐工集团工程机械有限公司 Rotary drilling rig and its anti-lost speed control method, device and system
CN110644564A (en) * 2019-09-11 2020-01-03 徐州徐工挖掘机械有限公司 Hydraulic excavator control system and method
WO2021063152A1 (en) * 2019-09-30 2021-04-08 江苏谷登工程机械装备有限公司 Control system of horizontal-directional drilling machine and control method therefor

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CN201459784U (en) * 2009-07-08 2010-05-12 北汽福田汽车股份有限公司 Control system for controlling lifting speed of movable arm of excavating machine and excavating machine

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CN2918545Y (en) * 2006-05-31 2007-07-04 三一重机有限公司 Elevation self-adaptive digging machine
CN101310114A (en) * 2006-07-31 2008-11-19 新履带牵引车三菱有限公司 Control device of work machine
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Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102996536B (en) * 2012-11-27 2015-04-22 三一重工股份有限公司 Load sensitive hydraulic system and power controller thereof as well as crane
CN102996536A (en) * 2012-11-27 2013-03-27 三一重工股份有限公司 Load sensitive hydraulic system and power controller thereof as well as crane
CN103061738A (en) * 2012-12-28 2013-04-24 三一重工股份有限公司 Rotary drilling rig and auxiliary construction system and method thereof
CN103061738B (en) * 2012-12-28 2015-08-12 三一重工股份有限公司 The auxiliary construction system of rotary drilling rig, rotary drilling rig and method
CN103615029A (en) * 2013-11-01 2014-03-05 中外合资沃得重工(中国)有限公司 Power control system and method of negative flow hydraulic pump of middle-large size hydraulic excavator
CN104003305A (en) * 2014-05-26 2014-08-27 徐工集团工程机械股份有限公司 Matching method and device of crane pump control system threshold power
CN104295423B (en) * 2014-10-10 2017-05-03 中国神华能源股份有限公司 Fuel pump oil supply method and system
CN104295423A (en) * 2014-10-10 2015-01-21 中国神华能源股份有限公司 Fuel pump oil supply method and system
CN104405707B (en) * 2014-10-21 2016-06-01 恒天创丰重工有限公司 A kind of split-pump hydraulic system and Poewr control method thereof
CN104405707A (en) * 2014-10-21 2015-03-11 恒天创丰重工有限公司 Multi-pump hydraulic system and power control method thereof
CN104405003A (en) * 2014-10-28 2015-03-11 上海华兴数字科技有限公司 Pump and valve synchronous control system
CN104373332A (en) * 2014-10-28 2015-02-25 浙江三一装备有限公司 Main pump power control system and method and engineering machine
CN104832298A (en) * 2015-03-17 2015-08-12 北京市三一重机有限公司 Engine gear control system and rotary drilling rig
CN104963374A (en) * 2015-06-12 2015-10-07 广西柳工机械股份有限公司 Method for automatically controlling working modes of excavator
CN105221278A (en) * 2015-10-23 2016-01-06 长安大学 Based on the rotary drilling rig control system of global power coupling
CN105421521A (en) * 2015-11-11 2016-03-23 潍柴动力股份有限公司 Flameout-preventing control method and system for excavator
CN105502191A (en) * 2015-12-16 2016-04-20 徐州燕大传动与控制技术有限公司 Main pump displacement control method in main windlass confluence hoisting process of rotary drilling rig
CN105502191B (en) * 2015-12-16 2017-12-29 徐州燕大传动与控制技术有限公司 Discharge of main pump control method in a kind of lifting process of rotary drilling rig master winch interflow
CN106542450A (en) * 2016-03-02 2017-03-29 徐工集团工程机械有限公司 Rotary drilling rig and its anti-lost speed control method, device and system
CN110644564A (en) * 2019-09-11 2020-01-03 徐州徐工挖掘机械有限公司 Hydraulic excavator control system and method
WO2021063152A1 (en) * 2019-09-30 2021-04-08 江苏谷登工程机械装备有限公司 Control system of horizontal-directional drilling machine and control method therefor

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Application publication date: 20120815