CN102705211A - Small discharge capacity and small pressure control loop of variable pump and control method thereof - Google Patents
Small discharge capacity and small pressure control loop of variable pump and control method thereof Download PDFInfo
- Publication number
- CN102705211A CN102705211A CN2012102204697A CN201210220469A CN102705211A CN 102705211 A CN102705211 A CN 102705211A CN 2012102204697 A CN2012102204697 A CN 2012102204697A CN 201210220469 A CN201210220469 A CN 201210220469A CN 102705211 A CN102705211 A CN 102705211A
- Authority
- CN
- China
- Prior art keywords
- solenoid valve
- variable displacement
- displacement pump
- control loop
- pressure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Fluid-Pressure Circuits (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
The invention discloses a small discharge capacity and small pressure control loop of a variable pump and a control method thereof. An electronic control end of an electromagnetic valve, an electronic control end of a proportional pressure relief valve and an engine speed sensor are respectively connected with a controller; an energy accumulator is connected with a guide pump of the control loop of the variable pump through a first electromagnetic valve and a one-way valve; the energy accumulator is connected with a discharge capacity drive loop hydraulic fluid port of the control loop of the variable pump through the first electromagnetic valve and the proportional pressure relief valve; the energy accumulator is connected with a discharge capacity control hydraulic fluid port of the control loop of the variable pump through a second electromagnetic valve and a second one-way valve; a third electromagnetic valve and a fourth electromagnetic valve is connected with an oil outlet of the control loop of the variable pump; and the engine speed sensor detects the rotate speed of an output shaft connecting with an engine and the variable pump. According to the invention, the control on the minimum discharge capacity and the minimum pressure of the variable pump can be realized, and starting load of the engine and oil consumption during the operation can be effectively reduced.
Description
Technical field
The present invention relates to a kind of variable displacement pump control loop, particularly relate to little discharge capacity of a kind of variable displacement pump and little pressure control circuit, the invention still further relates to the controlling method of little discharge capacity of this variable displacement pump and little pressure control circuit.
Background technique
Rely on hydraulic system that Engine Mechanical can be converted into the motion of equipment under the excavator normal conditions, like rising, the decline of working arm, interior receipts or outer pendulum, actions such as the revolution of car load.And the conversion of whole process energy is to realize through oil hydraulic pump drive hydraulic jack and oil hydraulic motor; Generally; Motor need be born oil hydraulic pump and start or move; The product of hydraulic pressure pump delivery and outlet pressure has determined the size of engine start or load torque value in service; In the application practice of excavator, the electric current of starting motor and the burden of storage battery when oil hydraulic pump has increased engine start on the one hand to the load that motor brought are brought problems such as starting difficulty simultaneously under low temperature condition; On the other hand, this load has caused the loss of engine operation energy.Therefore,, solve engine start and reduce the oil consumption problem, propose the present invention, the little discharge capacity of a kind of variable displacement pump, little pressure control circuit and controlling method in order to reduce engine start and operating load.
Summary of the invention
The little discharge capacity of variable displacement pump and the little pressure control circuit of the oil consumption when first technical problem to be solved by this invention provides a kind of starting load that can effectively reduce motor with operation.
The little discharge capacity of variable displacement pump of the oil consumption when second technical problem to be solved by this invention provides a kind of starting load of realizing effectively reducing motor with operation and the controlling method of little pressure control circuit.
In order to solve above-mentioned first technical problem; Little discharge capacity of variable displacement pump provided by the invention and little pressure control circuit; Comprise variable displacement pump control loop and proportional pressure-reducing valve; Described variable displacement pump control loop comprises variable displacement pump control loop, variable displacement pump control loop and pioneer pump control loop; Speed probe is surveyed with the repacking that motor is connected with variable displacement pump and is connected; Accumulator links to each other with the pioneer pump of first one-way valve with described variable displacement pump control loop through first solenoid valve; Described accumulator links to each other with control loop flow control mouth with described proportional pressure-reducing valve through described first solenoid valve; Described accumulator links to each other with the flow control hydraulic fluid port of described variable displacement pump control loop with the 3rd one-way valve through second solenoid valve, second one-way valve, and the 3rd solenoid valve links to each other with the oil outlet of described variable displacement pump control loop respectively with the 4th solenoid valve, and the automatically controlled end and the described speed probe of described first solenoid valve, second solenoid valve, the 3rd solenoid valve and the automatically controlled end of the 4th solenoid valve, described proportional pressure-reducing valve are electrically connected with controller respectively.
Said first solenoid valve, second solenoid valve, the 3rd solenoid valve and the 4th solenoid valve are the switching value solenoid valve.
Described variable displacement pump is an axial plunger type variable capacity pump.
Described variable delivery side of pump is provided with pressure transducer, and described pressure transducer links to each other with described controller.
In order to solve above-mentioned second technical problem, the controlling method of little discharge capacity of realization variable displacement pump provided by the invention and little pressure control circuit comprises the steps;
Step s1: after controller powers on, the rotating speed of controller detection of engine, through the signal of speed probe, controller is judged the state of motor, judges that motor is in preparation starting state or normal operating condition;
Step s2: when the speed probe testing signal less than 200 rev/mins, controller sends a control signal to solenoid valve and proportional pressure-reducing valve respectively, makes solenoid valve and proportional pressure-reducing valve be in opening state;
Step s3: the pressure oil of accumulator is transported to the discharge capacity control loop hydraulic fluid port of variable displacement pump control loop respectively through second solenoid valve, second one-way valve and the 3rd one-way valve;
Step s4: the pressure oil of accumulator is transported to the control loop flow control mouth place of proportional pressure-reducing valve and variable displacement pump control loop respectively through first solenoid valve;
Step s5: the output oil port of variable displacement pump links to each other with fuel tank with the 4th solenoid valve through the 3rd solenoid valve respectively, makes that like this pressure of variable displacement pump delivery outlet is very low;
Step s6: when the speed probe testing signal greater than after 200 rev/mins and a period of time of delaying time, controller is controlled variable displacement pump according to the instruction and the runnability of system, makes variable displacement pump be in little discharge capacity and little pressure state at the same time or separately;
Step s7: when motor normally moved, controller was realized the pressurising and the holding pressure control of accumulator through the break-make of control first solenoid valve.
Described minimum injection rate is that discharge capacity approaches 0 position.
Described pressure minimum is near the minimum return pressure 0.2MPa of system.
Adopt the little discharge capacity of variable displacement pump and the little pressure control circuit and the controlling method thereof of technique scheme; On the basis of original variable pump systems, adopt controller and accumulator, solenoid valve, one-way valve to cooperate running; Through the controller opens solenoid valve; The drive access of conducting accumulator has been realized little discharge capacity and little pressure control to variable displacement pump, the oil consumption of the starting load that effectively reduces motor during with operation.
In sum, the present invention has realized the control to the minimum injection rate and the pressure minimum of variable displacement pump, the oil consumption of the starting load that effectively reduces motor during with operation.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Fig. 2 is a controlling method flow chart of the present invention.
Embodiment
Below in conjunction with Figure of description the present invention is done further detailed explanation.
Referring to shown in Figure 1, in the specific embodiment of the present invention, this main pump float amount start-up control method comprises variable displacement pump control loop 11; Controller 13, accumulator 1, the first solenoid valve 2, second solenoid valve 3, the 3rd solenoid valve 4, the 4th solenoid valve 5; Proportional pressure-reducing valve 6; First one-way valve 7, second one-way valve 8, the 3rd one-way valve 9, speed probe 12, motor 10.Variable displacement pump control loop 11 comprises variable displacement pump control loop 11a, variable displacement pump control loop 11b and arrives first the pump control loop; First solenoid valve 2, second solenoid valve 3, the 3rd solenoid valve 4 and the automatically controlled end of the 4th solenoid valve 5, the automatically controlled end and the speed probe 12 of proportional pressure-reducing valve 6 are electrically connected with controller 13 respectively; Accumulator 1 links to each other with the pioneer pump of variable displacement pump control loop 11 with first one-way valve 7 through first solenoid valve 2; Accumulator 1 links to each other with control loop flow control mouth with proportional pressure-reducing valve 6 through first solenoid valve 2 simultaneously; Accumulator 1 links to each other with the flow control hydraulic fluid port of variable displacement pump control loop 11 with the 3rd one-way valve 9 through second solenoid valve 3, second one-way valve 8; The 3rd solenoid valve 4 links to each other with the oil outlet of variable displacement pump control loop 11 respectively with the 4th solenoid valve 5, the rotating speed of the axle that speed probe 12 detection of engine 10 are connected with variable displacement pump.First solenoid valve 2, second solenoid valve 3, the 3rd solenoid valve 4 and the 4th solenoid valve 5 are the switching value solenoid valve, and variable displacement pump is an axial plunger type variable capacity pump.
Fig. 2 is the control flow chart of the little discharge capacity of this a kind of variable displacement pump, little pressure-activated controlling method, and it comprises the steps:
Step s1: after controller 13 powers on, the rotating speed of controller 13 detection of engine 10, through the signal of speed probe 12, the state of 13 pairs of motors 10 of controller is judged, judges that motor is in preparation starting state or normal operating condition;
In this step, speed probe 12 is used for the rotating speed of the output shaft that detection of engine 10 is connected with variable displacement pump, and before motor 10 started, the rotating speed of output shaft was 0 rev/min, and behind normal the startup, minimum speed is above 500 rev/mins;
Step s2: when speed probe 12 testing signals less than 200 rev/mins; Controller 13 sends a control signal to first solenoid valve 2, second solenoid valve 3, the 3rd solenoid valve 4, the 4th solenoid valve 5 and proportional pressure-reducing valve 6 respectively, makes the solenoid valve 2 of winning, second solenoid valve 3, the 3rd solenoid valve 4, the 4th solenoid valve 5 and proportional pressure-reducing valve 6 be in opening state;
Step s3: the pressure oil of accumulator 1 is transported to the flow control hydraulic fluid port of variable displacement pump control loop 11 respectively through second solenoid valve, 3, the second one-way valves 8 and the 3rd one-way valve 9;
Step s4: the pressure oil of accumulator 1 is transported to proportional pressure-reducing valve 6 and variable displacement pump control loop flow control mouth respectively through first solenoid valve 2, makes variable displacement pump be in the minimum injection rate position;
Step s5: the delivery outlet of variable displacement pump links to each other with fuel tank with the 4th solenoid valve 5 through the 3rd solenoid valve 4 respectively, makes that like this pressure of variable displacement pump delivery outlet is very low;
Through step 4 and step 5, variable displacement pump is in little discharge capacity and little pressure state, and owing to the power of variable displacement pump is very little, thereby the load that has alleviated motor 10 makes the startup of motor 10 become and is more prone to;
Step s6: when speed probe 12 testing signals greater than after 200 rev/mins and a period of time of delaying time, controller 13 stops to transmit control signal to second solenoid valve 3, the 3rd solenoid valve 4, the 4th solenoid valve 5 and proportional pressure-reducing valve 6;
In this step; Controller 13 can be controlled variable displacement pump according to the instruction and the runnability of system; Can make variable displacement pump be in little discharge capacity and little pressure state at the same time or separately, pressure minimum is near the minimum return pressure 0.2Mpa of system, and minimum injection rate is that discharge capacity approaches 0 position;
Step s7: when motor 10 normal operations, controller 13 is realized the pressurising and the holding pressure control of accumulator 1 through the break-make of control first solenoid valve 2.
Further, native system can increase p1 as shown in Figure 1 and p2 pressure transducer in order to ensure normal operation, and p1 is connected with controller 13 with the p2 pressure transducer, is used for the running state of detection variable pump, realizes Redundant Control.Solenoid valve in the foregoing description can adopt Proportional valve to replace.Even if controller 13 breaks down, the outage working position of solenoid valve also can guarantee the original system proper functioning.The present invention is the bivariate pumping system, and is suitable equally for the single argument pumping system.
The little discharge capacity of a kind of variable displacement pump of the present invention, little pressure control circuit and controlling method; On the basis of original variable pump systems, adopt controller and accumulator, solenoid valve, one-way valve to cooperate running; Through the controller opens solenoid valve; The drive access of conducting accumulator has been realized little discharge capacity and little pressure control to variable displacement pump, the oil consumption of the starting load that effectively reduces motor during with operation.
Claims (7)
1. little discharge capacity of variable displacement pump and little pressure control circuit; Comprise variable displacement pump control loop (11) and proportional pressure-reducing valve (6); Described variable displacement pump control loop (11) comprises variable displacement pump control loop (11a), variable displacement pump control loop (11b) and pioneer pump control loop; It is characterized in that: speed probe (12) is surveyed with the repacking that motor (10) is connected with variable displacement pump and is connected; Accumulator (1) links to each other with the pioneer pump of first one-way valve (7) with described variable displacement pump control loop (11) through first solenoid valve (2); Described accumulator (1) links to each other with control loop flow control mouth with described proportional pressure-reducing valve (6) through described first solenoid valve (2); Described accumulator (1) links to each other with the flow control hydraulic fluid port of the 3rd one-way valve (9) with described variable displacement pump control loop (11) through second solenoid valve (3), second one-way valve (8); The 3rd solenoid valve (4) links to each other with the oil outlet of described variable displacement pump control loop (11) respectively with the 4th solenoid valve (5), and the automatically controlled end of described first solenoid valve (2), second solenoid valve (3), the 3rd solenoid valve (4) and the automatically controlled end of the 4th solenoid valve (5), described proportional pressure-reducing valve (6) and described speed probe (12) are electrically connected with controller (13) respectively.
2. little discharge capacity of variable displacement pump according to claim 1 and little pressure control circuit is characterized in that: described first solenoid valve (2), second solenoid valve (3), the 3rd solenoid valve (4) and the 4th solenoid valve (5) are the switching value solenoid valve.
3. little discharge capacity of variable displacement pump according to claim 1 and 2 and little pressure control circuit is characterized in that: described variable displacement pump is an axial plunger type variable capacity pump.
4. little discharge capacity of variable displacement pump according to claim 1 and 2 and little pressure control circuit is characterized in that: described variable delivery side of pump is provided with pressure transducer, and described pressure transducer links to each other with described controller (13).
5. realize the controlling method of little discharge capacity of the described variable displacement pump of claim 1 and little pressure control circuit, it is characterized in that: comprise the steps;
Step s1: after controller powers on, the rotating speed of controller detection of engine, through the signal of speed probe, controller is judged the state of motor, judges that motor is in preparation starting state or normal operating condition;
Step s2: when the speed probe testing signal less than 200 rev/mins, controller sends a control signal to solenoid valve and proportional pressure-reducing valve respectively, makes solenoid valve and proportional pressure-reducing valve be in opening state;
Step s3: the pressure oil of accumulator is transported to the discharge capacity control loop hydraulic fluid port of variable displacement pump control loop respectively through second solenoid valve, second one-way valve and the 3rd one-way valve;
Step s4: the pressure oil of accumulator is transported to the control loop flow control mouth place of proportional pressure-reducing valve and variable displacement pump control loop respectively through first solenoid valve;
Step s5: the output oil port of variable displacement pump links to each other with fuel tank with the 4th solenoid valve through the 3rd solenoid valve respectively, makes that like this pressure of variable displacement pump delivery outlet is very low;
Step s6: when the speed probe testing signal greater than after 200 rev/mins and a period of time of delaying time, controller is controlled variable displacement pump according to the instruction and the runnability of system, makes variable displacement pump be in little discharge capacity and little pressure state at the same time or separately;
Step s7: when motor normally moved, controller was realized the pressurising and the holding pressure control of accumulator through the break-make of control first solenoid valve.
6. the controlling method of little discharge capacity of realization variable displacement pump according to claim 5 and little pressure control circuit is characterized in that: described minimum injection rate is that discharge capacity approaches 0 position.
7. according to the controlling method of claim 5 or 6 little discharge capacities of described realization variable displacement pump and little pressure control circuit, it is characterized in that: described pressure minimum is near the minimum return pressure 0.2MPa of system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210220469.7A CN102705211B (en) | 2012-06-29 | 2012-06-29 | A kind of variable pump small displacement and little pressure control loop and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210220469.7A CN102705211B (en) | 2012-06-29 | 2012-06-29 | A kind of variable pump small displacement and little pressure control loop and control method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102705211A true CN102705211A (en) | 2012-10-03 |
| CN102705211B CN102705211B (en) | 2015-12-23 |
Family
ID=46898210
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210220469.7A Active CN102705211B (en) | 2012-06-29 | 2012-06-29 | A kind of variable pump small displacement and little pressure control loop and control method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102705211B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104480991B (en) * | 2014-12-16 | 2016-09-07 | 山河智能装备股份有限公司 | A kind of hydraulic pump of excavator controls loop and control method thereof |
| CN107161898A (en) * | 2017-07-06 | 2017-09-15 | 杭州华泰电液成套技术有限公司 | The hydraulic control system and its method of a kind of tension windlass |
| CN110219845A (en) * | 2019-06-24 | 2019-09-10 | 江西鑫通机械制造有限公司 | A kind of hydraulic system of general power control |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2394316A (en) * | 1999-10-19 | 2004-04-21 | Sumitomo | Control unit for a construction machine |
| JP2010121726A (en) * | 2008-11-20 | 2010-06-03 | Caterpillar Japan Ltd | Hydraulic control system in work machine |
| CN101748767A (en) * | 2009-12-17 | 2010-06-23 | 三一重机有限公司 | Excavating machine starting control method and device thereof |
| JP2011085159A (en) * | 2009-10-13 | 2011-04-28 | Hitachi Constr Mach Co Ltd | Hydraulic driving device of working machine |
| CN102221021A (en) * | 2011-06-23 | 2011-10-19 | 三一重机有限公司 | Main pump small-displacement start control loop and control method |
| CN102304934A (en) * | 2011-06-27 | 2012-01-04 | 浙江苏强格液压股份有限公司 | Hydraulic system of excavator |
| KR20120026199A (en) * | 2010-09-09 | 2012-03-19 | 볼보 컨스트럭션 이큅먼트 에이비 | Hydraulic pump control system for construction machine |
| CN202718847U (en) * | 2012-06-29 | 2013-02-06 | 山河智能装备股份有限公司 | Small-displacement and small-pressure control loop for variable pump |
-
2012
- 2012-06-29 CN CN201210220469.7A patent/CN102705211B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2394316A (en) * | 1999-10-19 | 2004-04-21 | Sumitomo | Control unit for a construction machine |
| JP2010121726A (en) * | 2008-11-20 | 2010-06-03 | Caterpillar Japan Ltd | Hydraulic control system in work machine |
| JP2011085159A (en) * | 2009-10-13 | 2011-04-28 | Hitachi Constr Mach Co Ltd | Hydraulic driving device of working machine |
| CN101748767A (en) * | 2009-12-17 | 2010-06-23 | 三一重机有限公司 | Excavating machine starting control method and device thereof |
| KR20120026199A (en) * | 2010-09-09 | 2012-03-19 | 볼보 컨스트럭션 이큅먼트 에이비 | Hydraulic pump control system for construction machine |
| CN102221021A (en) * | 2011-06-23 | 2011-10-19 | 三一重机有限公司 | Main pump small-displacement start control loop and control method |
| CN102304934A (en) * | 2011-06-27 | 2012-01-04 | 浙江苏强格液压股份有限公司 | Hydraulic system of excavator |
| CN202718847U (en) * | 2012-06-29 | 2013-02-06 | 山河智能装备股份有限公司 | Small-displacement and small-pressure control loop for variable pump |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104480991B (en) * | 2014-12-16 | 2016-09-07 | 山河智能装备股份有限公司 | A kind of hydraulic pump of excavator controls loop and control method thereof |
| CN107161898A (en) * | 2017-07-06 | 2017-09-15 | 杭州华泰电液成套技术有限公司 | The hydraulic control system and its method of a kind of tension windlass |
| CN107161898B (en) * | 2017-07-06 | 2018-11-06 | 杭州流控机器制造有限公司 | A kind of hydraulic control system and its method of tension windlass |
| CN110219845A (en) * | 2019-06-24 | 2019-09-10 | 江西鑫通机械制造有限公司 | A kind of hydraulic system of general power control |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102705211B (en) | 2015-12-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8502402B2 (en) | Power generating apparatus of renewable energy type and control method thereof | |
| CN104863911B (en) | Hydraulic circuit used for controlling no-load rotation speed of hydraulic motor to be stable through load-sensitive variable pump | |
| CN111649023B (en) | Buffering oil supplementing system and method for electro-hydraulic double-control motor driving rotation system | |
| CN108383039A (en) | A kind of energy-saving stepping type lifter structure hydraulic control system | |
| CN102420552A (en) | Control loop and control method for improving starting and stopping performance of motor | |
| CN102705211A (en) | Small discharge capacity and small pressure control loop of variable pump and control method thereof | |
| CN106088208A (en) | Excavator revolution hydraulic control system | |
| CN201071519Y (en) | Output torque equalization control device of prime motor | |
| CN101113597B (en) | Prime move output torque equalising control device | |
| CN202718847U (en) | Small-displacement and small-pressure control loop for variable pump | |
| CN102493916B (en) | Off-course hydraulic braking device of wind generating set | |
| CN201972980U (en) | Closed type hydraulic system used on cylindrical dumper | |
| CN103031957A (en) | Control system and method for concrete machine | |
| CN202833367U (en) | Mortar pump hydraulic system and mortar pump | |
| CN110520634A (en) | Equipment for adjusting hydrodynamic machine | |
| CN101850937A (en) | Closed hydraulic circuit of hoisting winding engine | |
| CN201116558Y (en) | Prime motor output torque balance control device | |
| CN216430146U (en) | Hydraulic control system and working machine | |
| CN108374814B (en) | Energy accumulator test bed and control method thereof | |
| CN214742430U (en) | Unloading valve motor starting device | |
| CN201587407U (en) | Cableway single-power hydraulic station adopting reducing valve for speed regulation | |
| CN104358729A (en) | Hydraulic start-stop device and method for engine for engineering machinery | |
| CN202381442U (en) | Novel variable capacity pump system for hydraulic power station | |
| CN116733798B (en) | Aerial working platform and floating control system thereof | |
| CN206738078U (en) | A kind of hydraulic drive type wind power generating set |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |