CN102434505A - Dual-power multi-pump converging long-distance pressure adjusting method and system - Google Patents
Dual-power multi-pump converging long-distance pressure adjusting method and system Download PDFInfo
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- CN102434505A CN102434505A CN2011104077070A CN201110407707A CN102434505A CN 102434505 A CN102434505 A CN 102434505A CN 2011104077070 A CN2011104077070 A CN 2011104077070A CN 201110407707 A CN201110407707 A CN 201110407707A CN 102434505 A CN102434505 A CN 102434505A
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Abstract
The invention relates to a dual-power multi-pump converging long-distance pressure adjusting method, wherein a pressure adjusting module is added on the basis of a conventional closed-type hydraulic control system. The pressure adjusting module comprises a cutoff throttling valve, a pressure adjusting valve, a hydraulic control one-way valve and a non-way valve, wherein the cutoff throttling valve and the pressure adjusting valve are connected to an output pipeline of a converged oil path in series; a converged oil liquid part is supplied to a power output system and partially flows to the pressure adjusting module; oil liquid flowing to pressure adjusting module is throttled by the cutoff throttling valve and is then adjusted and converged by the pressure adjusting valve; the converged oil liquid subjected to pressure adjusting mostly flows to an oil return pipeline and flows back to a hydraulic pump, and the other small part of the oil liquid enters a control oil path of a servo oil cylinder through the hydraulic control one-way valve and the one-way valve; and deformation of an inclined disc of the variable delivery pump is controlled by the servo oil cylinder, and output pressure of each closed-type hydraulic pump is adjusted to realize long-distance pressure adjusting. A dual-power multi-pump converging long-distance pressure adjusting system disclosed by the invention can provide stable hydraulic output, and can be used for carrying out pressure control on a working pump during single-power working, so that the working pump is free from influence of fault or pump outage.
Description
Technical field
The present invention relates to a kind of pressure regulating method and system of hydraulic system, especially double dynamical many pumps collaborate long-range voltage-regulating system.
Technical background
Hydraulic system be a kind of be working medium with fluid, through annexes such as control valves, utilize the pressure of fluid can be operating hydraulically operated the complexes of actuator's work.A complete hydraulic system is made up of power original paper, execution original paper, control unit, annex and hydraulic oil; Running medium power original paper can be converted into fluid hydraulic pressure with mechanical energy can; The execution original paper can be converted into mechanical energy with hydraulic pressure again and offer the external world; The control original paper is controlled oil liquid pressure, flow or flow direction, and annex is guaranteed system's proper functioning.Double dynamical being meant adopts two power sources that energy is provided, and many pumps are meant that each power source body moves two to the closed type hydraulic pump more than two, and pressure regulation is meant through adjusting and makes that each pump delivery pressure keeps equating.The patent report of relevant double-power hydraulic system:
CN1432739 discloses a kind of interflow and unloading control method of split-pump hydraulic system; Especially for heavy mechanical equipments such as loaders, adopt pilot operated directional control valve to replace at present domestic and international widely used unloading valve as the interflow of split-pump hydraulic system and the control unit of off-load, can arbitrary each pump of control close shunting; Cut down the consumption of energy to greatest extent and heating value; Both improved the reliability of element and system, and reduced cost again, effect is remarkable.
CN102220863A discloses a kind of horizontal directional drilling machine valve control automatic merging hydraulic system; It comprises walking pump, running motor control valve, push and pull pump, push cylinder control valve, clamp pump, clamp multi-way valve; Hydraulic system also comprises three six-way transfer valves, pilot operated directional control valve, one-way valve I and one-way valve II; Said three six-way transfer valves are arranged between clamp pump and clamp multi-way valve; Pilot operated directional control valve is provided with a filler opening, two oil outlets and a control port; The filler opening of pilot operated directional control valve is connected with an oil outlet of three six-way transfer valves; One of them oil outlet of pilot operated directional control valve is linked the filler opening of said running motor control valve through the one-way valve I, and another oil outlet of pilot operated directional control valve is linked the filler opening of said push cylinder control valve through the one-way valve II, and the filler opening of running motor control valve is also linked in pilot operated directional control valve control port.
CN201037377 discloses a kind of horizontal directional drilling machine valve control interflow speedup hydraulic system; Comprise rotary pump, multiple directional control valve, push and pull pump and push cylinder control valve, high low pressure oil-piping; Described multi-way valve comprises that Spin Control joins and top gear control joins; Top gear control joins and comprises one group of selector valve and little driving oil cylinder, and the spool control end of selector valve is connected with little driving oil cylinder, and a quilt is shut among two oil outlets of valve block; The another one oil outlet through an oil pipe be connected to the push cylinder control valve after the push-and-pull delivery side of pump is communicated with, the control oil channel of little driving oil cylinder is connected with the electromagnetic valve oil circuit; Native system has made full use of driving unit head rotary pump and original multi-way valve of rig itself; Couplet number and hydraulic pipe line seldom through increasing multi-way valve change; Simply realized the fast slewing function at interflow; Thereby realize the function of horizontal directional drilling machine fast advance and retreat, system pipeline is simple, reliable operation, cost are low.
CN102094861A discloses a kind of many pump interflow hydraulic systems and interflow valve group thereof that is used for hoist; Have first oil outlet, second oil outlet, first filler opening, second filler opening and return opening, and be provided with in its valve body: first control valve, second control valve and first selector valve.Switching through the first selector valve working position; Control the unlatching of first control valve and second control valve or close; Fluid from first filler opening and the entering of second filler opening only can be flowed out from the second main hydraulic fluid port of first control valve or second control valve, and then get into the load that is communicated with first oil outlet or second oil outlet.Therefore, this interflow valve group can make the fluid interflow of two oil hydraulic pump outputs to same oil outlet, because the fluid flow at interflow is bigger; Can satisfy the more loaded work piece of more number simultaneously; Thereby the quantity of oil hydraulic pump in the minimizing hydraulic system reduces production cost, simplifies hydraulic system.The invention also discloses a kind of many pumps interflow hydraulic system that is used for hoist.
CN101158165 discloses a kind of double-power hydraulic digging machine; This machine has hydraulic system, track bottom car assembly, swivel gear, operator cabin, operation mechanism; Operation mechanism has swing arm, dipper and scraper bowl; Hydraulic system has internal-combustion engine and motor two cover power sources, is used to drive hydraulic-pressure pump.The present invention when construction environment is used easily, adopts motoring in cities and towns constructions or electricity consumption, both can reduce noise, also can save the energy, reduces operating expenses; Away from power supply or transition the time, use internal combustion engine drive.
CN201144909 discloses a kind of hydraulic control system of hydraulic press; Its control end at first cartridge valve of existing control hydraulic press master cylinder turnover oil inserts first electrohydraulic proportional control valve, and the while is inserted second electrohydraulic proportional control valve at the control end that control ejects the 7th cartridge valve of oil cylinder turnover oil; The input current of the electromagnet through changing first electrohydraulic proportional control valve, second electrohydraulic proportional control valve; What change first cartridge valve, the 7th cartridge valve opens valve pressure; Thereby the change system pressure makes existing hydraulic press can realize long-range pressure regulation, can improve the precision of hydraulic press.
Find as yet at present relevant double dynamical many pumps collaborate long-range voltage-regulating system report.
Summary of the invention
The objective of the invention is:The invention provides a kind of long-range pressure regulating method of double dynamical many pumps and system; Collaborate pressure regulation through intersecting with mode one to one between the oil hydraulic pump that the different dynamic source is driven; The pressure of balanced different oil hydraulic pumps; The output of steady pressure, the pressure to working pump in the time of can realizing single power source work is simultaneously regulated, and does not receive the influence of fault or stoppage in transit pump.
Technological scheme of the present invention is:The long-range voltage-regulating system of double dynamical many pumps; Respectively drive at two power sources on the conventional Closed Hydraulic control system basis of two closed type hydraulic pumps and increased voltage regulating module; Adopt the dual power source structure; The closed type hydraulic pump of each drive power source more than two or two when dual power source moves together, adopts one to one mode to intersect and collaborates pressure regulation between the oil hydraulic pump of two drive power source; During single power source work, do not collaborate, voltage regulating module still can carry out pressure controlling to working pump.With two closed type hydraulic pumps of each drive power source is example, and pressure regulating method and principle are seen Fig. 1.
Double dynamical many pumps collaborate long-range pressure regulating method and system, on conventional Closed Hydraulic control system basis, have increased voltage regulating module, and this module comprises cut-off type throttle valve, pressure regulator valve, Pilot operated check valve and one-way valve; Cut-off type throttle valve and pressure regulator valve serial connection is connected on oil circuit output behind the interflow (tell, the suction inlet) pipeline; Oil circuit output pipe behind the said interflow is meant when dual power source moves together; Two power sources respectively drive two closed type hydraulic pumps; In in the closed type hydraulic pump of one power source one closed type hydraulic pump with another power source one adopts one to one mode to intersect the oil circuit output pipe after collaborating; Turn on after Pilot operated check valve and the one-way valve serial connection between pressure regulator valve and the servo-cylinder control mouth, the fluid behind the interflow is partly supplied with power output system, and part flows to voltage regulating module; The fluid that flows to voltage regulating module carries out throttling through the cut-off type throttle valve earlier; Regulate interflow fluid by pressure regulator valve then; Fluid most of oil returning tube that gets in interflow is back to oil hydraulic pump after the pressure regulation; Another fraction through the amount of deformation of servo-cylinder controlled variable pump swash plate, is adjusted every closed type hydraulic pump delivery pressure to realize long-range pressure regulation through the control oil channel that Pilot operated check valve and one-way valve get into servo-cylinder.
Double dynamical many pumps collaborate long-range voltage-regulating system; Voltage regulating module behind two oil hydraulic pumps interflow of every intersection has two groups, because the variable displacement pump swash plate can double-deformation, so the fluid behind two oil hydraulic pumps interflow of every intersection has two flow directions; Each flows to all installs one group of voltage regulating module; Through collaborating the adjusting of one-way valve of voltage regulating module on the pipeline of back, guarantee various flows to the time, the fluid through voltage regulating module is always earlier through the cut-off type throttle valve; Again through pressure regulator valve, then through Pilot operated check valve and one-way valve.
Double dynamical many pumps collaborate long-range voltage-regulating system, and the oil hydraulic pump quantity of two drive power source equates, and is even number.
Cut-off type throttle valve in the voltage regulating module is regulated the fluid flow size in the pipeline, does not change pressure simultaneously, reduces the oil mass through pressure regulator valve, reduces the loss of energy.
Pressure regulator valve in the voltage regulating module, the pressure of fluid in the regulator solution pressing system, the pressure reduction between the equilibrium liquid press pump, steady pressure output.
One-way valve in the voltage regulating module can only be mobile along a specific direction through the fluid of these parts, and medium can't flow back in the other direction, makes through the fluid after the pressure regulator valve adjusting and flow to servo-cylinder control mouth, prevents that the fluid in the servo-cylinder from refluxing.
Pilot operated check valve in the voltage regulating module; When the control oil channel pilot pressure was imported, piston mandril moved right under the pressure oil effect, backs down one-way valve with push rod; Oil inlet and outlet is connected; Make to make the fluid reverse flow during greater than filler opening, but when having pressure, can not block circulation that the oil hydraulic pump when making only by work just can carry out pressure regulation at hydraulic fluid port pressure.
The invention has the beneficial effects as follows:The long-range voltage-regulating system of double dynamical many pumps is on the basis of conventional Closed Hydraulic control system, to have added voltage regulating module; Adopt the different dynamic source to drive between the oil hydraulic pump to intersect and collaborate pressure regulation with man-to-man mode; The balanced pressure reduction of two interflow oil hydraulic pumps, the output of having stablized pressure; Secondly, when single power source was worked, voltage regulating module still can be regulated the pressure of working pump, does not receive the influence of fault or stoppage in transit pump, and unit still can work on when guaranteeing that a power source is out of order.
Description of drawings
The double dynamical double pump of Fig. 1 collaborates long-range voltage-regulation principle block diagram.
The long-range voltage regulating module theory diagram of Fig. 2 enclosed pump.
Fig. 3 closed type hydraulic pump internal control theory diagram
1. No. 4 11.A1 of first power source, 2. second power source No. 3 10. Regulation Control modules of No. 2 9. Regulation Control modules of No. 1 8. Regulation Control module of No. 4 7. Regulation Control modules of No. 3 6. Closed Hydraulic pumping systems of No. 2 5. Closed Hydraulic pumping systems of 3. closed type hydraulic pump system 1s, 4. Closed Hydraulic pumping systems go out oiler 12.B1 and go out oiler 13.A2 and go out oiler 14.B2 and go out oiler; 15. cut-off type throttle valve 16. pressure regulator valves 17; 20; 21. one-way valve 18; 19. Pilot operated check valve 22; 23. enclosed pump A; B outlet 24; 25. servocylinder control outlet 26. handle control electromagnetic valve 27. electro hydraulic valves 28. multifunction valves 29. control oil pumps 30. variable displacement pump swash plates.
Embodiment
As shown in the figure, the long-range voltage-regulating system of double dynamical many pumps among Fig. 1-3 is made up of conventional Closed Hydraulic pump control system and voltage regulating module, and embodiment is following:
Conventional Closed Hydraulic pump control system comprises parts such as power source, variable displacement pump swash plate, handle control electromagnetic valve, electro hydraulic valve, multifunction valve, control oil pump, servo-cylinder.The dual power source structure is selected by system, and the oil hydraulic pump quantity of each drive power source equates, and is even number.But adopted the variable displacement pump swash plate of double-deformation in the power original paper, but connected the external hydraulic pipe line of two-way flow; Connect servo-cylinder on the variable displacement pump swash plate, be used for control, regulate pressure.Use handle control electromagnetic valve and electro hydraulic valve UNICOM, regulate internal pressure.
Double dynamical many pumps collaborate long-range voltage-regulating system; During dual power source work, adopt man-to-man mode to intersect between the oil hydraulic pump that the different dynamic source drives and collaborate, back, an interflow fluid part is through voltage regulating module; Regulate the pressure of balanced output, steady pressure output is provided; During the single power source operation, the fluid in the working pump does not collaborate, but still some carries out pressure regulation through voltage regulating module, does not receive the influence of fault or stoppage in transit pump.With the dual power source double pump is example, No. 2, the first drive power source closed type hydraulic pump system 1 and Closed Hydraulic pumping system, No. 4, No. 3, second drive power source Closed Hydraulic pumping system and Closed Hydraulic pumping system; No. 3 interflow of No. 1, hydraulic pump system and Closed Hydraulic pumping system are then arranged, and by No. 1, Regulation Control module and No. 2 pressure regulation of Regulation Control module it; No. 4 interflow of No. 2, Closed Hydraulic pumping system and Closed Hydraulic pumping system, and by No. 3, Regulation Control module and No. 4 pressure regulation of Regulation Control module it; Four of the two-way formation in interflow back go out oiler, comprise that 11.A1 goes out oiler, 12.B1 and goes out that oiler, 13.A2 go out oiler, 14.B2 goes out oiler.
Voltage regulating module comprises throttle valve, pressure regulator valve, Pilot operated check valve and one-way valve when ending; Throttle valve, Pilot operated check valve, the aperture of one-way valve and the range of regulation of pressure regulator valve are installed then when selecting to end with pressure according to the fluid flow of the conventional Closed Hydraulic pump control system of selecting.Outflow end behind the fluid interflow connect earlier by the time throttle valve, and then connect pressure regulator valve, then most ofly flow back to oil hydraulic pump through return line, fraction divides and flows into Pilot operated check valve and the one-way valve that is connected servo-cylinder control mouth in pressure regulator valve and each interflow oil hydraulic pump.The oil hydraulic pump at per two interflow has two groups of body voltage regulating modules; And and be connected in interflow fluid output (tell, suction inlet) pipe ends; Every pack module under the control that is installed in the one-way valve on the pressure regulation pipeline, guarantee fluid can only from by the time throttling valve flow to pressure regulator valve, prevent reverse flow.
Embodiment:According to the method for above-mentioned whole machine installation and debugging, obtain 300 tons of horizontal directional drilling machines, its major parameter is:
1, boundary dimension: 18000mm * 3200mm * 3200mm
2, machine weight: 45 tons
3, motor total output: 600kw
4, maximum impetus: 300 tons
5, oil hydraulic pump quantity: 12
The technical parameter of this model machine body voltage regulating module is following:
Throttling clear valve diameter: 5 ~ 15mm when 1, ending
2, pressure regulator valve regulation range: 0 ~ 45Mpa
3, pressure regulation pipeline diameter: 5 ~ 15mm
4, fluid-control one-way clear valve diameter: 5 ~ 15mm
5, one-way valve aperture: 5 ~ 15mm.
Claims (9)
1. double dynamical many pumps collaborate long-range pressure regulating method, and it is characterized in that has increased voltage regulating module on conventional Closed Hydraulic control system basis, and this module comprises cut-off type throttle valve, pressure regulator valve, Pilot operated check valve and one-way valve; Cut-off type throttle valve and pressure regulator valve serial connection are connected on the oil circuit output pipe behind the interflow; Oil circuit output pipe behind the said interflow is meant when dual power source moves together; Two power sources respectively drive two closed type hydraulic pumps; In in the closed type hydraulic pump of one power source one closed type hydraulic pump with another power source one adopts one to one mode to intersect the oil circuit output pipe after collaborating; Turn on after Pilot operated check valve and the one-way valve serial connection between pressure regulator valve and the servo-cylinder control mouth, the fluid behind the interflow is partly supplied with power output system, and part flows to voltage regulating module; The fluid that flows to voltage regulating module carries out throttling through the cut-off type throttle valve earlier; Regulate interflow fluid by pressure regulator valve then; Fluid most of oil returning tube that gets in interflow is back to oil hydraulic pump after the pressure regulation; Another fraction through the amount of deformation of servo-cylinder controlled variable pump swash plate, is adjusted every closed type hydraulic pump delivery pressure to realize long-range pressure regulation through the control oil channel that Pilot operated check valve and one-way valve get into servo-cylinder.
2. double dynamical many pumps according to claim 1 collaborate long-range pressure regulating method, it is characterized in that described double dynamical many pumps collaborate long-range voltage-regulating system, and the voltage regulating module behind two oil hydraulic pump interflow of every intersection has two groups; Because the variable displacement pump swash plate can double-deformation; So the fluid behind two oil hydraulic pump interflow of every intersection has two flow directions, each flows to all installs one group of voltage regulating module, through collaborating the adjusting of the one-way valve of voltage regulating module on the pipeline of back; Various flows to the time; Fluid through voltage regulating module always passes through the cut-off type throttle valve earlier, again through pressure regulator valve, then through Pilot operated check valve and one-way valve.
3. double dynamical many pumps according to claim 1 collaborate long-range pressure regulating method, and the fluid when it is characterized in that the single power source operation in the working pump does not collaborate, but still some is through voltage regulating module, regulates the pressure of balanced operation oil hydraulic pump.
4. double dynamical many pumps according to claim 1 collaborate long-range pressure regulating method, it is characterized in that the conventional Closed Hydraulic control system of selecting for use is the dual power source structure, and the closed type hydraulic pump quantity of two drive power source is identical, and is even number.
5. double dynamical many pumps according to claim 1 collaborate long-range voltage-regulating system, it is characterized in that the cut-off type throttle valve in the voltage regulating module, and these parts are regulated the fluid flow size in the pipeline, do not change pressure simultaneously, reduce the oil mass through pressure regulator valve.
6. double dynamical many pumps according to claim 1 collaborate long-range pressure regulating method, it is characterized in that the pressure regulator valve in the voltage regulating module, the pressure of fluid in this parts regulator solution pressing system, the pressure reduction between the equilibrium liquid press pump, steady pressure output.
7. double dynamical many pumps according to claim 1 collaborate long-range pressure regulating method; It is characterized in that the one-way valve in the voltage regulating module; Fluid through these parts can only flow along a specific direction; Medium can't flow back in the other direction, makes through the fluid after the pressure regulator valve adjusting and flows to servo-cylinder control mouth, prevents that the fluid in the servo-cylinder from refluxing.
8. double dynamical many pumps according to claim 1 collaborate long-range pressure regulating method, it is characterized in that the Pilot operated check valve in the voltage regulating module, when the control oil channel pilot pressure is imported; Piston mandril moves right under the pressure oil effect; Back down one-way valve with push rod, oil inlet and outlet is connected, make to make the fluid reverse flow during greater than filler opening at hydraulic fluid port pressure; But when having pressure, can not block circulation, the oil hydraulic pump when making only by work just can carry out pressure regulation.
9. double dynamical many pumps collaborate long-range voltage-regulating system; It is characterized in that on two power sources respectively drive the conventional Closed Hydraulic control system basis of two closed type hydraulic pumps, having increased voltage regulating module; Conventional Closed Hydraulic control system comprises power source, Closed Hydraulic pumping system, power output system, output pipe system, pressure flow supervisory system, automatical control system, and said voltage regulating module comprises cut-off type throttle valve, pressure regulator valve, Pilot operated check valve and one-way valve; Cut-off type throttle valve and pressure regulator valve serial connection are connected on the oil circuit output pipe behind the interflow; Oil circuit output pipe behind the said interflow is meant when dual power source moves together; Two power sources respectively drive two closed type hydraulic pumps; In in the closed type hydraulic pump of one power source one closed type hydraulic pump with another power source one adopts one to one mode to intersect the oil circuit output pipe after collaborating; Turn on after Pilot operated check valve and the one-way valve serial connection between pressure regulator valve and the servo-cylinder control mouth, the fluid behind the interflow is partly supplied with power output system, and part flows to voltage regulating module; The fluid that flows to voltage regulating module carries out throttling through the cut-off type throttle valve earlier; Regulate interflow fluid by pressure regulator valve then; Fluid most of oil returning tube that gets in interflow is back to oil hydraulic pump after the pressure regulation; Another fraction through the amount of deformation of servo-cylinder controlled variable pump swash plate, is adjusted every closed type hydraulic pump delivery pressure to realize long-range pressure regulation through the control oil channel that Pilot operated check valve and one-way valve get into servo-cylinder.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103216475A (en) * | 2013-04-16 | 2013-07-24 | 无锡市钻通工程机械有限公司 | Hydraulic closed circuit applying to double-hydraulic pump combined and separated drive |
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| CN101158165A (en) * | 2007-11-06 | 2008-04-09 | 康凤明 | Double-power hydraulic digging machine |
| JP2008274988A (en) * | 2007-04-25 | 2008-11-13 | Hitachi Constr Mach Co Ltd | Three-pump hydraulic circuit system of construction machine and three-pump hydraulic circuit system of hydraulic shovel |
| CN102094861A (en) * | 2010-12-02 | 2011-06-15 | 徐州重型机械有限公司 | Multi-pump concurrent flow hydraulic system for crane and concurrent valve bank |
| JP2011174491A (en) * | 2010-02-23 | 2011-09-08 | Kyb Co Ltd | Control device for hybrid construction machine |
| CN102245910A (en) * | 2009-05-08 | 2011-11-16 | 萱场工业株式会社 | Control device for hybrid construction machine |
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| CN1432739A (en) * | 2002-01-15 | 2003-07-30 | 陈嘉川 | Current associating and unloading control method for multiple-pump hydraulic system |
| JP2008274988A (en) * | 2007-04-25 | 2008-11-13 | Hitachi Constr Mach Co Ltd | Three-pump hydraulic circuit system of construction machine and three-pump hydraulic circuit system of hydraulic shovel |
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| CP01 | Change in the name or title of a patent holder | ||
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Address after: Gaochun District of Nanjing City, Jiangsu province 211300 Ba Zhen Wu Tai Road No. 12 Building 1 Co-patentee after: Jiangsu Gaochun Ceramics Co.,Ltd. Patentee after: Jiangsu gaotao Machinery Manufacturing Co., Ltd. Address before: Gaochun District of Nanjing City, Jiangsu province 211300 Ba Zhen Wu Tai Road No. 12 Building 1 Co-patentee before: JIANGSU GAOCHUN CERAMICS INDUSTRIAL Co.,Ltd. Patentee before: Jiangsu gaotao Machinery Manufacturing Co., Ltd. |