CN103649562B - Utilize combination type open loop and the hydraulic system of closed loop pumping system - Google Patents
Utilize combination type open loop and the hydraulic system of closed loop pumping system Download PDFInfo
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- CN103649562B CN103649562B CN201280032979.XA CN201280032979A CN103649562B CN 103649562 B CN103649562 B CN 103649562B CN 201280032979 A CN201280032979 A CN 201280032979A CN 103649562 B CN103649562 B CN 103649562B
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- 238000005086 pumping Methods 0.000 title claims abstract description 43
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- 238000006073 displacement reaction Methods 0.000 claims description 2
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Abstract
Pumping system includes closed loop fluid circuit and open-loop fluid circuit.Closed loop fluid circuit includes the motor rotated for the first component making to be connected to closed loop fluid circuit.Closed loop pump is the highest drives described motor with the first maximum (top) speed.Open-loop fluid circuit includes the open-loop pump of the second component for being drivingly connected to open-loop fluid circuit.Control circuit and include the control valve for switching the output stream from open-loop pump.Open-loop pump is optionally connected to closed loop fluid circuit and makes open-loop pump separate with open-loop fluid circuit simultaneously by this control valve.When open-loop pump is connected to closed circuit, closed loop pump and open-loop pump drive motor with the second rotating speed more than the first maximum (top) speed.
Description
Technical field
The application submitted to as PCT International Patent Application on June 29th, 2012, this international monopoly
Apply for the entitled Eaton of applicant (the transnational public affairs of the U.S. at all designated states in addition to the U.S.
Department), only specify United States citizen James Philip Dybing to be applicant in the U.S., and require 2011
The priority of the U.S. Provisional Patent Application of the serial number 61/503,761 that on July 1, in submits to, this Shen
Theme please is integrally incorporated by quoting.
Background technology
Many vehicles and Hydraulic Equipment use closed loop drive hydraulic motor and use open-loop pump to drive
Hydrodynamic pressure motor and cylinder.Closed loop pump and motor system can be used for operating mixed in transit car, and (tank drives tooth
Wheel motor in roller box is to advance vehicle, or drives motor to operate such as platform, unit head
(head), the miscellaneous function such as conveyer.Closed loop fluid circuit and open-loop fluid circuit are typically independent of
Each circuit and run.
In a concrete example, it is also known that the mixed in transit car for concrete or cement trucks is used for
Construction site is transported, is stirred and topple over a large amount of concrete.Typically, it is used for making agitator tank rotate and controlling
The hydraulic system of auxiliary equipment processed includes two the single fluid lines being briefly described above.First-class
Body circuit includes the pump that can make tank low speed and high speed rotating.Low speed rotation is for typically in the transport phase
Between prevent concrete from hardening after agitation.High speed rotating makes when ready-mixed concrete or when cleaning tank
With.In this respect, typically need mammoth pump to make blender rotate, even if its heap(ed) capacity is little
It is used.Second fluid circuit uses less pump (compared with the first pump) to drive mixed in transit car
On auxiliary equipment, such as tag axle (tag axle), chute lifting device (chute lift) etc..
This pump is used for the concrete after carrying stirring the most on construction ground.
Summary of the invention
In one aspect, this technology relates to a kind of pumping system, and this pumping system includes: closed loop fluid circuit,
This closed loop fluid circuit includes: for making the first component being connected to described closed loop fluid circuit rotate
Motor；With the closed loop pump for driving described motor with the first maximum (top) speed；Open-loop fluid circuit, should
Open-loop fluid circuit includes the open loop of the second component for drive connection to described open-loop fluid circuit
Pump；And control circuit, this control circuit includes: control valve, and this control valve is used for optionally to
Described open-loop pump is connected to described closed loop fluid circuit, makes described open-loop pump and described open loop fluid simultaneously
Circuit disconnects, wherein, when described open-loop pump is connected to described closed circuit, and described closed loop pump and institute
State open-loop pump and drive described motor with the second maximum (top) speed more than described first maximum (top) speed.At one
In embodiment, described closed loop fluid circuit also includes spool control valve (control spool), and this control is sliding
Valve is for controlling the direction of rotation of described closed loop pump so that when described spool control valve is in primary importance,
Output stream from described closed loop pump is conducted through described closed circuit in the first direction.Real at another
Executing in example, described control circuit also includes reversal valve system, and this reversal valve system is for controlling from institute
State the output stream of open-loop pump so that when described open-loop pump is connected to described closed circuit and when described
When reversal valve system is in the first state, the most directed from the output stream of described open-loop pump
By described closed circuit.In another embodiment, described pumping system also includes supplying pump, this supply
Pump is for each filling hydraulic fluid in closed loop fluid circuit and open-loop fluid circuit.The most another
In one embodiment, described pumping system also includes for driving described open-loop pump, described closed loop pump and described
The shared motor of each in supply pump.
In another embodiment of the above, described reversal valve system includes reversal valve.Real at another
Executing in example, described reversal valve system includes in multiple hydraulic pilot valve and multiple helitron operation valve
At least one.In certain embodiments, being each in described closed loop pump and described open-loop pump
Variable delivery pump.In other embodiments, to be connected to closed loop variable delivery pump, open loop variable for controller
Each in displacement pump, motor and control valve.In another embodiment, receive when described controller
During the first component rate signal, described first component rate signal corresponds to expectation the first component speed,
Described expectation the first component speed exceedes produces when described closed loop variable delivery pump is in the first maximum (top) speed
The the first component speed given birth to, described controller transmission control signal is to activate described control valve, thus incites somebody to action
Described open loop variable delivery pump is connected to described closed loop fluid circuit.In another embodiment, described
Control valve is hand-operated valve.
On the other hand, this technology relates to a kind of mixed in transit car including said pump system, Qi Zhongsuo
Stating the first component is tank.
On the other hand, this technology relates to a kind of method controlling pumping system, and described pumping system has bag
The closed loop fluid circuit including closed loop variable delivery pump, the open-loop fluid circuit including open loop variable delivery pump,
Control valve and controller, described method includes: the first desired speed letter received based on described controller
Number and regulate the output flow of described closed loop variable delivery pump；And received based on described controller
Two expectation rate signals activate described control valve to close described in being connected to by described open loop variable delivery pump
Ring fluid line.In one embodiment, described method includes the 3rd received based on described controller
Rate signal and increase the output flow of open loop variable speed pump.In another embodiment, described method
Hope that rate signal reduces described open loop variable delivery pump including the fourth phase received based on described controller
Output flow.In one embodiment, described method includes the expectation side received based on described controller
The output stream direction from described closed loop variable delivery pump is changed to signal.In another embodiment,
Described method includes that the desired orientation signal received based on described controller changes described open loop variable capacity
The position of the reversal valve at long-pending delivery side of pump.In another embodiment, described method is included in actuating
The miscellaneous function of described open-loop fluid circuit is cut off before described control valve.In another embodiment, institute
The method of stating includes supplying hydraulic pressure to each in described open-loop fluid circuit and described closed loop fluid circuit
Fluid.
Accompanying drawing explanation
Presently preferred embodiment shown in the drawings, it should be understood that, the present invention is not
It is limited to shown accurate arrangement and means.
Fig. 1 is the schematic diagram of the pumping system for mixed in transit car.
Fig. 2 is the combination type open loop for mixed in transit car and the schematic diagram of closed loop pumping system.
Fig. 3 is the combination type open loop for dual path propulsion system and the schematic diagram of closed loop pumping system.
Fig. 3 A-3B is the expansion partial schematic diagram of the system of Fig. 3.
Fig. 4 is combination type open loop and the schematic diagram of closed loop pumping system advancing circuit for single path.
Fig. 5 is combination type open loop and another embodiment of closed loop pumping system advancing circuit for single path
Schematic diagram.
Fig. 6 A and 6B shows and controls for the combination type open loop of mixed in transit car and closed loop pumping system
Method.
Detailed description of the invention
Now the illustrative aspects of the present invention illustrated in the accompanying drawings is described in detail.All can
In the case of energy, all accompanying drawings will use identical reference to represent same or analogous structure.
In this application, generally combination type open loop and closed loop hydraulic system described in the context of mixed in transit car
System.But, combined system disclosed herein can be used on diversified vehicle such as crop spraying machine,
Glide steering loader, swathmaker and united reaper and other type of industrial equipment such as blender,
In proportioning machine, conveyer and the application of other special purpose revolving actuator.System disclosed herein
Other application is conceived to and will be apparent to for those of ordinary skill in the art.
Fig. 1 shows the schematic diagram of the pumping system for mixed in transit car 10.Pumping system 100 includes
One pump 102, this first pump drives tank motor 104, this tank motor and then make tank rotate.Second pump 106
Driving one or more auxiliary part or equipment, such as, vehicle tag axle 108, cement chute carry
Rise device or location equipment 110 or other auxiliary part 112.Control manifold 114 and control valve 116
The selectivity allowing the second pump 106 and second fluid circuit 118 disconnects and therefore the second pump 106 and the
The selectivity of one fluid line 120 connects.In an illustrated embodiment, first fluid circuit 120 is
Closed circuit, and second fluid circuit 118 is open loop circuit.But, in an alternate embodiment, two
Individual circuit can be closed circuit.Owing to tank must operate to discharge in it during toppling on the contrary
Inclusion, therefore being generally not intended to first fluid ring is open loop circuit.Control valve 116 and control manifold 114
The second pump 106 is allowed to be connected with the selectivity of two circuits and isolate.Control valve 116 can be by manually
Operate or can be activated by electronic controller 122, as shown in the figure.By the output by the second pump 106
Combine with first fluid circuit 120, tank motor speed can be improved.Velocity sensor 124 on tank motor
Control valve 116 is made to activate together with instruction input speed, thus as you need or want by the
Two pumps 106 combine with first fluid circuit 120.If needing high speed rotating, such as, mixed when stirring
When solidifying soil or cleaning tank, the output of the second pump 106 can be transferred to first fluid circuit 120 to allow
Improve the rotating speed of tank motor.
When needs or when being desirable for miscellaneous function, control valve 116 activates again, thus is guided by stream
To the auxiliary part needing stream.When the second pump 106 is isolated with first fluid circuit 120, tank motor
Rotate with relatively low velocity, thus assist in ensuring that the concrete being maintained in tank will not harden.As above institute
Stating, typical miscellaneous function is chute control (promote, rotate, folding etc.) and tag axle pressure
Power controls, but can add other function.
Fig. 2 shows the combination type open loop for mixed in transit car and the schematic diagram of closed loop pumping system 200.
Pumping system 200 shown in Fig. 2 includes open loop feed lines, for driving the variable volume of tank motor to close
Ring pumping system and for driving the variable volume open-loop pump system of auxiliary part of mixed in transit car.Control
Circuit 280 includes a number of component for being connected and disconnected from open loop and closed circuit.
Feed lines includes providing for charging and controlling for by shown partially the closing in A side and B side
The supply pump 202 of the pressure of ring hydrostatic driver circuit.Supply pump 202 via main aspiration line from
Reservoir 204 pumping hydraulic fluid.Suction screen cloth or filter 206 prevent the chip from reservoir 204
It is inhaled in system.Supply pump 202 by power source or motor 208(typically, explosive motor or
Motor) drive.In shown system, shared motor 208 via integral drive to all supplies
Pump 202, open-loop pump 210 and closed loop pump 212 provide power.In such an embodiment, supply pump 202
Can be integrated in an assembly with pump 212 and pump 210.In other embodiments, can be to supply
Pump 202 uses dedicated motor.The volume of supply pump 202 can be required or it by concrete application as required
Its factor determines.But, in commercial embodiment, it is usable in high tickover RPM dirty
The pump of amount about 8 gpms to about 12 gpms, but it is contemplated that other capacity.
The feed pressure that charging relief valve 214 controls to include in the closed circuit of pump 212 is arranged and relevant
Control requirement.Pass through additionally, this relief valve 214 will utilize low-pressure safety valve 216 to balance to provide
The suitably oil stream of the pump case of pump 212 and the motor shell of motor 218.The outlet stream of supply pump 202
Cross feed pressure filter 220 enter the low-pressure side of hydrostatic driver circuit with cleaning and enter setting
The control valve of pump volume (spool control valve 234 and solenoid 236,238, as described in more detail below)
Oil.After filtration, hydraulic fluid enters the closed loop fluid circuit being positioned at low-pressure side.Shown
In embodiment, the low-pressure side of closed loop fluid circuit represents with A.Check-valves 222 allows feed pressure to enter
Enter the low-pressure side of circuit.Low-pressure side is the reflux side of the entrance close to pump 212.Check-valves 224 prevents
On high-tension side stream from closed loop fluid circuit.If motor direction of rotation reverses, then B side becomes low
The reflux side of pressure.In this configuration, hydraulic fluid enters closed-loop via check-valves 222, and stops
Returning valve 224 prevents fluid from flowing out from high voltage supply side.Power limits valve 226,228 and is positioned at check-valves
222, between 224 and pump 212.These power limits valve and is typically set to be in sealing fluid line
Under maximum allowble pressure in road.In certain embodiments, valve 226 and 228 about 5000 to about
Activate under 6000PSI.At this pressure, closing stream will be made by the stream of power restriction valve 226,228
Feed pressure in body circuit is reduced to pump 212 and will reduce due to the spring in piston 230 or 232
The degree of stroke, thus overcome the feed pressure of reduction and wobbler is urged into centre position.Rotation
Turn swash plate pivoting angle directly related with rate of discharge because it affect pump piston whole inwardly and to
Outer movement.When wobbler is pivoted to centre position, there is not the outwardly or inwardly motion of pump piston,
Therefore flow is reduced to zero output.Wobbler can be controlled so as to through centre position, and output stream
It is brought out from the second port, thus causes motor to be driven in reverse direction.
Supply pump 202 is also to spool control valve 234 delivering hydraulic fluid, and spool control valve 234 is for basis
Need to servo piston 230 or 232 fuel feeding to set flow and the direction of closed loop pump 212.Control sliding
Valve 234 includes two the control solenoids 236,238 controlled by electronic controller 240.Each solenoid
236,238 spool control valve 234 can be made to move, thus make feed pressure to two servo pistons 230,
One of them of 232 is open, so that the stroke of pump 212 is in the desired direction.Servo piston 230,
232 also control flow.Servo piston 230 makes wobbler move to arrive fluid drives when pressurization
The A side of sealing fluid ring.Similarly, servo piston 232 makes wobbler move to incite somebody to action when pressurization
Fluid drives is to the B side of sealing fluid ring, thus retains the direction of pump 212 and therefore motor 218.
In another embodiment, can use two-position, three-way valve that stream is conducted directly to two servo pistons
230, one of them of 232.This configuration eliminating guiding valve 234 and being used for is made guiding valve 234 with servo
Control the similar mode of ring to move with the feedback element needing to maintain set volume according to controller 240
242.Setting position is at least partially based on the horse as utilized velocity sensor 244 to record by controller 240
Reach the requirement speed of 218 and determine.
It addition, supply pump 202 is also to closed loop pump 212 and the hydrostatic motor 218 of driving agitator tank
Conveying cooling hydraulic fluid stream.Cooling fluid from closed loop pump 212 enters through hydraulic cooler 246
Entering reservoir, this reservoir can be unit reservoir 204.Cooling fluid passes through the housing of motor 218 and passes
Delivering to reservoir, this reservoir can also be unit reservoir 204.According to concrete application demand, the need to
Further management to feed stream, then can use optional solenoid 248.This will help ensure that suitable
When cooling and by motor 218 and the maximum pressure requirement of the housing of closed loop pump 212.Solenoid 248
Can be controlled by electronic controller 240, depend on concrete operations condition.
First fluid circuit is included under the first configuration for closed loop fluid circuit in this case
Hydraulic fluid is made to move to B side (high-pressure side or supply side) from A side (low-pressure side or reflux side)
Closed loop variable delivery pump 212.As it has been described above, closed loop pump 212 is driven by motor 208 and its output stream
Can be reversed so that hydraulic motor 218 rotates along positive direction or opposite direction as control order.
In some commercial embodiment, closed loop pump 212 can produce from about 30 gpms to about 35 gpms
Maximum stream flow, but imagination has other pump of other capacity.Closed loop pump 212 directly drives
Fix or the hydrostatic motor 218 of variable volume.Can be based on being specifically used for determining motor 218
Size.
Rotating speed and the direction of motor output driving shaft 250 measured by velocity sensor 244.This speed recorded
Degree is used as the input to controller 240, and controller 240 controls two pumps 212 and 210 provides suitable
When flow make, to meet, the expectation rotating speed that axle 250 rotates.Axle 250 can be to advance circuit, transport
Mixer tank driver circuit or usually arbitrarily rotation driving application.Reversal valve 252 allows superfluous charging
(that is, fluid) flows through and is left this circuit by charging relief valve 216.Reversal valve 252 also allows for surplus
Charging, by motor shell, thus cools down and lubricates the internals of motor 218.Charging relief valve 216
Charging relief valve 214 is utilized to balance to guarantee the suitable flow of the housing by motor 218.
If necessary or desired, it is possible to utilize and control aperture or pressure compensated flow actuator
254 get around the housing of motor 218 with a part for permission feed stream.It should be pointed out that, from pump
210 and the merging of stream of supply pump 202 cause than the stream typically encountered in traditional closed-loop drive system
Measure much higher flow.It is directed through hydraulic cooler 246 from the stream of flow regulator 254 output
Or be only delivered directly to reservoir, as it can be seen, depend on the consideration that system size determines.Or,
Special cooler can be installed in the downstream of flow regulator 254.
Open fluid circuit is driven by the variable delivery pump 210 from unit reservoir 204 suction of hydraulic fluid.
In one embodiment, the pressure compensation variable delivery pump that circuit pump 210 can be load sensing is opened.
Pump 210 includes pressure limit feed back control system 210A and load sensing feed back control system 210B two
Person, common in arbitrary load induction line.The volume of pump 210 will be determined by application demand,
But in some commercial embodiment, it is contemplated that be up to about the flow of 15 gpms.Pump 210 is by from horse
Reach the directly driving of 208 or driven by dedicated motor.Output from pump 210 flow to by controller
240 proportional solenoids 262 controlled.As described below, controller 240 activating solenoids 262 is to permit
Permitted fluid and flowed into closed circuit from pump 210, wanted as being based partially on the speed setting needed for motor 218
As asking.When typical tag axle circuit needs stream, controller 240 starts another electromagnetic valve
256 so that pump proceeds to pressure limit state.In other circuit, it may not be necessary to electromagnetic valve 256 or
Tradition load induced signal can be fed as an alternative so that pump regulation stroke is institute via reversal valve 258
The flow needed.If necessary or desired, lead to auxiliary line stream can by air relief valve 260 with
Protection auxiliary line component is from excessive pressure.
When solenoid 262 is positioned to provide from the stream of open circuit pump 210 to sealing fluid ring, should
Flow by hydraulicdirectional control valve 264 the stream from pump 210 to be directed to the high-pressure side of this closed loop.Open
Other element of fluid line includes allowing the outlet pump pressure from pump 210 to be directed back into pump 210
On load sensing feedback pilot valve make pump 210 increase the check-valves 266 of flow.Proportional solenoid 262
Position by form pump 210 will response produce the requirement stream needed for the requirement rotating speed meeting motor 218
The pressure margin of amount.Proportional solenoid 262 is controlled to realize motor 218 by electronic controller 240
Desired output speed.Additionally, check-valves 266 will prevent any stream from pump 210 from requiring pump 210
Enter closed loop system and do not merge with the stream from closed loop pump 212 when miscellaneous function is provided.Check-valves 268
Sealing fluid circuit need not prevent from during the stream from pump 210 driving line from closed loop fluid static(al)
The backflow on road.Reversal valve 258 allows to lead to when merging when with closed loop pump circuit the load sense of pump 210
Induction signal or the load induced signal from auxiliary line.Aperture and filter 270 do not have at pump 210
Load induced signal is released when having traffic requirement.Outlet pressure is reduced to low pressure and treats by this releasing aperture 270
Machine is arranged, thus reduces the power loss when need not the function of pump 210.
Fig. 3 is the combination type open loop for dual path propulsion system 300 and the schematic diagram of closed loop pumping system.
The schematic diagram of partial enlargement illustrates in figures 3 a and 3b.This dual path system 300 includes two combinations
Formula open loop and closed circuit, each circuit controls the half propulsion functions of dual path machine, described dual path
Machine can include self-propelled swathmaker, self-propelled forage harvester and glide steering loader.This germline
System 300 can be used in and use dual path to advance in any vehicle of drive hydraulic system principle.At various circuits
The component of middle use at layout and the functionally layout shown in system 200 with Fig. 2 and functional similarity,
And therefore it is not described in more detail at this.But, for the sake of clarity, identified below necessarily
The element of quantity.System 300 includes two closed loop pumps 312,312', each one of two closed circuit.
Closed circuit also includes motor 318,318'.Relevant to each motor in these motor 318,318'
Driving means the most not shown, but will be similar to that the driving means 250 shown in Fig. 2 works
To provide power to expectation equipment.In each circuit in two closed circuit also include supply pump 302,
302'.Each open loop circuit includes open-loop pump 310,310'.Motor 308 drive two closed loop pumps 312,
312' and two supply pumps 302,302'.Individually motor 309 drives two open-loop pump.Certainly, may be used
Use a motor in place motor 308,309.
Control circuit 380,380' allows relevant open loop and the isolation of closed circuit and combination.Shown
Control the valve configuration in circuit 380,380' slightly different with the embodiment in Fig. 2.Specifically, and
With reference to controlling circuit 380, hydraulicdirectional control valve 264(figure 2 illustrates) by including hydraulicdirectional control valve
364 and two hydraulic pilot valves 365A, 365B valve system substitute.These three valve 364,365A,
365B performs the function identical with valve 264 jointly.Certainly, alternatively use a hydraulic control valve,
The such as valve 264 shown in Fig. 2.Similar valve 364', 365A', 365B' is used in controlling circuit 380'
Configuration.Common link between two combination type open loops and closed circuit is ground.
Fig. 4 is combination type open loop and the schematic diagram of closed loop pumping system advancing circuit 400 for single path.
This system 400 is available for the revolving actuator of special purpose and uses.Equally, describe above with reference to front figure
Many components.For the sake of clarity, shown system 400 includes closed loop pump 412 and supply pump 402,
Both driven by motor 408.Individually motor 409 drives open-loop pump 410.Motor 418 can be by
Closed circuit provides power, or is combined offer power by open loop and closed circuit.Control circuit 480 to wrap
Include hydraulicdirectional control valve 464 and two hydraulic pilot valves 465A, 465B.
Fig. 5 is to advance another combination type open loop of circuit 500 and showing of closed loop pumping system for single path
It is intended to.This system 500 is available for the revolving actuator of special purpose and uses.Equally, above with reference to front
Figure describes many components.Shown system 500 includes closed loop pump 512 and supply pump 502, both
Driven by motor 508.Individually motor 509 drives open-loop pump 510.Motor 518 can be by closed loop
Circuit provides power, or is combined offer power by open loop and closed circuit.Control circuit 580 with above
Control circuit described in middle Fig. 2-4 is different.Specifically, controlling circuit 580 utilizes electrical solenoid to grasp
Open-loop pump 510 is connected to closed circuit by valve 564A, 564B of making.
Fig. 6 A and 6B show control as controlled by electronic controller 240 for mixed in transit car
A kind of method 600 of pumping system (the such as pumping system 200 shown in Fig. 2).Similar method is conceived to
It is used for controlling the system shown in Fig. 3-5 and will be apparent to for a person skilled in the art.
Method 600 receives with controller and indicates the signal (operation 602) in desired motor 218 direction to start.
The particular requirement direction of rotation of some function and motor 218 and therefore tank is relevant.Such as, stir, clearly
Wash and typically require that tank is rotated in a first direction with transportation function.Concrete is released operation and is typically required that
Tank along second, contrary direction rotates.In certain embodiments, some pattern (such as, stirring)
Automatically can program with setting speed, but shown method imagination is for the gearshift adjustment of all patterns.As
The really desired direction of the operator direction change (operation 604) of selection before the motor of operating,
The pump of any operating then can be slowed or stopped before changing flow direction.First, it should reduce or complete
Full cut-off stops the output (operation 606) of open-loop pump 210, and closed loop pump 212 then should be made to slow down
And then stop (operation 608).Once the operating of pump 212 is fully slowed down, and just changes spool control valve
The position (operation 610) of 234.Reversal valve 264 the most typically changes position in response to pressure change
(operation 612), but be used as requiring actuating based on the signal sent from electronic controller 240
Reversal valve.
After the flow direction being set by circuit, electronic controller 240 receives and represents that tank speed sets
The signal (operation 614) put.Equally, tank speed sets and (such as, can stir with certain operational modes
Mix) relevant, but operator's Non-follow control may be more preferably.If this speed is arranged less than closed loop pump 212
Maximum stream flow (operation 616), then this algorithm (behaviour that next judges whether electromagnetic valve 262 closes
Make 618), so that it is guaranteed that open-loop pump 210 is isolated with closed loop fluid circuit.Hereafter, regulation closed loop pump
The flow of 212, until it meets desired speed set point (operation 620).Hereafter, this algorithm etc.
Treat the further regulation that speed is arranged.Alternately or additionally, this algorithm may wait for direction arrange enter one
Step saves.Anyway, it is desirable to motor direction or the regulation further that arranges of motor speed will make calculation
Method returns to suitable position to continue the control of pump circuit.
Return speed determines inquiry (operation 616), if it is desired to speed set and close less than maximum
Ring pump 212 fluid ability (operation 622), first by volume or the Flow-rate adjustment of closed loop pump 212
For its maximum setting (operation 624).If closed loop pump 212 is in its maximum setting (operation 622),
Then next this algorithm judges from whether the stream of open-loop pump 210 flow to auxiliary or open fluid circuit
(operation 626).If be clearly not, then this algorithm first ensures that (operation opened by electromagnetic valve 262
628) (so that it is guaranteed that the connection between open-loop pump 210 and sealing fluid circuit), then regulates open loop
The output flow of pump 210 is to meet desired speed level (operation 630).Disclosed this defeated
Outflow controls.If open-loop pump 210 is to auxiliary line conveyance fluid (operation 626), then
Opening electromagnetic valve 262(operation 628) and regulate open-loop pump 210(operation 630) before by closing
Close electromagnetic valve 256 or control auxiliary valve function (not shown in Fig. 2) makes auxiliary flow to stop operation
Body circuit disconnects (operation 632).After adjustment, as it has been described above, this algorithm may wait for making into
Till the speed of one step or direction regulation.
Imagination controls other method of pumping system.Such as, said method imagination two-position reversal valve 264.
In the system embodiment shown in Fig. 2, reversal valve 264 includes three positions, and each position is used to
Guide from the A side of closed circuit or the output of B side, and the 3rd, centre position, and due to
Line pressure and automatically activated.It is used as the valve needing to be activated by electronic controller.Although it is above-mentioned
Method points out that reversal valve 264 is automatically moved to appropriate location based on pressure, but alternative embodiment can include
Require directly to activate and the reversal valve of the therefore amendment of this algorithm.Additionally, closed loop pump 212 can be solid
Constant volume pump, and open-loop pump 10 can be variable delivery pump.Therefore, gearshift adjustment will only can exceed solid
The maximum output flow of constant volume pump, this will need slightly different control.But, having two can
Capacity pump allows greater flexibility and control.Such as, two pumps can be regulated the most respectively
Volume.That is, replace once closed loop pump 212 to be set to maximum volume and just regulate open-loop pump 210
Volume, just can make open-loop pump 210 volume maximize and closed loop pump 212 can be regulated as required
Volume.This can be due to mechanically or electrically problem and nothing in the case of failure of pump or at a pump
Method provides redundancy in the case of reaching maximal rate.Imagine other amendment and control sequence.
Said pump system can be sold as external member in a packaging or in multiple packagings.External member
Can include closed loop pump, open-loop pump and supply pump, and necessary or desired sensor and valve, electronics
Controller etc..Or, pump, direct drive and the power supply for them can be together with Electronic Control
Device is sold together as a unit.Then user can obtain from third party or from pump supplier respectively
Various valves and sensor.In another embodiment, line P the component (as shown in Figure 2) defined can
It is included in a packaging, including all valves, sensor, pump, pipeline and other component.If
If wishing, control line can be included, but the description included by external member may be based on specifically
Equipment specifies the line type required.
It addition, electronic controller can fill the necessary software needed for systematic use or hardware.Replacing
Change in configuration, if it is desired that with PC as controller, if or being used in combination PC with pumping system
As user or service interface, the most various types of storage mediums (CD, DVD, usb driver
Deng) on can comprise software to upload to standard PC.It addition, external member description can include network address and close
Code is to download from the website on the Internet.
Control algolithm technology specifically described herein can be in the combination of hardware, software or hardware and software
Realize.Technology specifically described herein can with the most in a centralised manner realize or
Different elements realizes in the case of the computer system of some interconnection is distributed with a scattered manner.It is suitable for
Any kind of computer or the miscellaneous equipment that perform method specifically described herein are applicable.Hardware and
The typical combination of software can be the general-purpose computing system with computer program, described computer journey
Computer system control is become to make it to perform method specifically described herein when being loaded and executed by sequence.
But, owing to expecting that this technology is used on mixed in transit car, it is desirable to include the operator of necessity
The single hardware system (direction switch, velocity selector etc.) at interface.
Technology specifically described herein can also embed in computer program, this computer program
Including implementing all features of method specifically described herein, and it is when being loaded in computer system
It is able to carry out these methods.Computer program herein refers to have information processing capability for making
The employing of the one group of instruction performing specific function after system one or both directly or in the following is appointed
What language, code or any expression of symbol: a) be converted to another kind of language, code or symbol；B)
Reproduce with different material forms.
Although there have been described the embodiment being considered the exemplary of this technology and preferred embodiment, but
According to teaching herein, other remodeling of this technology will become aobvious to one skilled in the art
And be clear to.Concrete manufacture method disclosed herein and geometry are exemplary in nature and do not recognize
For being restrictive.Therefore, it is intended that in the following claims by all such modifications clearly for being in
In the spirit and scope of this technology.Therefore, it is intended that patent certificate protection is as in following claims
Middle restriction and the technology of differentiation and all equivalents.
Claims (18)
1. a pumping system, including:
Closed loop fluid circuit, described closed loop fluid circuit includes:
Motor, described motor rotates for making the first component being connected to described closed loop fluid circuit；
With
Closed loop pump, described closed loop pump is for driving described motor with the first maximum (top) speed；
Open-loop fluid circuit, described open-loop fluid circuit includes for drive connection to described open loop
The open-loop pump of the second component of fluid line, described open-loop fluid circuit provides miscellaneous function；And
Controlling circuit, described control circuit includes:
Control valve, described control valve is for being optionally connected to described closed loop by described open-loop pump
Fluid line, makes described open-loop pump disconnect with described open-loop fluid circuit simultaneously, wherein, opens when described
When ring pump is connected to described closed loop fluid circuit, described closed loop pump and described open-loop pump are with more than described
Second maximum (top) speed of one maximum (top) speed drives described motor,
Wherein, each in described closed loop pump and described open-loop pump includes variable delivery pump,
Wherein, described pumping system also include controller, described controller be connected to closed loop variable delivery pump,
Each in open loop variable delivery pump, motor and control valve,
Wherein, when described controller receives the first component rate signal, described first component speed letter
Number corresponding to expectation the first component speed, described expectation the first component speed exceedes in described closed loop variable
The first component speed that displacement pump produces when being in the first maximum (top) speed, described controller sends and controls letter
Number to activate described control valve, thus described open loop variable delivery pump is connected to described closed loop fluid line
Road,
Wherein, described control valve is being activated so that described open loop variable delivery pump is connected to described closed loop
Before fluid line, cut off the miscellaneous function of described open-loop fluid circuit.
Pumping system the most according to claim 1, wherein, described closed loop fluid circuit also includes control
Guiding valve processed, described spool control valve is for controlling the direction of rotation of described closed loop pump so that when described control
When guiding valve is in primary importance, the output stream from described closed loop pump is conducted through institute in the first direction
State closed loop fluid circuit.
Pumping system the most according to claim 2, wherein, described control circuit also includes reversal valve
System, described reversal valve system is for controlling the output stream from described open-loop pump so that open when described
When ring pump is connected to described closed loop fluid circuit and when described reversal valve system is in the first state,
It is conducted through described closed loop fluid circuit along described first direction from the output stream of described open-loop pump.
Pumping system the most according to claim 1, also include supply pump, described supply pump be used for
Described closed loop fluid circuit filling hydraulic fluid.
Pumping system the most according to claim 4, also includes for driving described open-loop pump, described
The shared motor of each in closed loop pump and described supply pump.
Pumping system the most according to claim 3, wherein, described reversal valve system includes reversal valve.
Pumping system the most according to claim 3, wherein, described reversal valve system includes multiple liquid
At least one in pressure pilot valve and multiple helitron operation valve.
Pumping system the most according to claim 1, wherein, described control valve includes hand-operated valve.
9. a mixed in transit car, this mixed in transit car includes the pumping system described in claim 1, its
Described in the first component include tank.
10. the method controlling pumping system, described pumping system has and includes closed loop variable delivery pump
Closed loop fluid circuit, include the open-loop fluid circuit of open loop variable delivery pump, control valve and controller,
Described method includes:
Based on described controller receive first expectation rate signal and regulate described closed loop variable delivery pump
Output flow；
Based on described controller receive second expectation rate signal and activate described control valve so that by institute
State open loop variable delivery pump and be connected to described closed loop fluid circuit；With
The miscellaneous function of described open-loop fluid circuit was cut off before activating described control valve.
11. methods according to claim 10, also include the 3rd received based on described controller
Rate signal and increase the output flow of open loop variable speed pump.
12. methods according to claim 11, also include the 4th received based on described controller
Desired speed signal and reduce the output flow of described open loop variable delivery pump.
13. methods according to claim 10, also include the expectation received based on described controller
Direction signal and change the output stream direction from described closed loop variable delivery pump.
14. methods according to claim 13, also include the expectation received based on described controller
Direction signal and change the position of the reversal valve in the exit of described open loop variable delivery pump.
15. methods according to claim 10, also include to described closed loop fluid circuit for feeding
Baric flow body.
16. 1 kinds of pumping systems, including:
Closed loop fluid circuit, described closed loop fluid circuit includes:
Motor, described motor rotates for making the first component being connected to described closed loop fluid circuit；
With
Closed loop pump, described closed loop pump is for driving described motor with the first maximum (top) speed；
Open-loop fluid circuit, described open-loop fluid circuit includes for drive connection to described open loop
The open-loop pump of the second component of fluid line；And
Controlling circuit, described control circuit includes:
Control valve, described control valve is for being optionally connected to described closed loop fluid by described open-loop pump
Circuit, makes described open-loop pump disconnect with described open-loop fluid circuit, wherein, when described open-loop pump simultaneously
When being connected to described closed loop fluid circuit, described closed loop pump and described open-loop pump are with more than described first
Second maximum (top) speed of big rotating speed drives described motor,
Wherein, described closed loop fluid circuit also includes that spool control valve, described spool control valve are used for controlling institute
State the direction of rotation of closed loop pump so that when described spool control valve is in primary importance, close from described
The output stream of ring pump is conducted through described closed loop fluid circuit in the first direction,
Wherein, described control circuit also includes that reversal valve system, described reversal valve system are used for controlling to come
Output stream from described open-loop pump so that when described open-loop pump is connected to described closed loop fluid circuit also
And when described reversal valve system is in the first state, from the output stream of described open-loop pump along described
One direction is conducted through described closed loop fluid circuit.
17. pumping systems according to claim 16, wherein, described reversal valve system includes commutation
Valve.
18. pumping systems according to claim 16, wherein, described reversal valve system includes multiple
At least one in hydraulic pilot valve and multiple helitron operation valve.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US201161503761P | 2011-07-01 | 2011-07-01 | |
| US61/503,761 | 2011-07-01 | ||
| PCT/US2012/044888 WO2013006423A2 (en) | 2011-07-01 | 2012-06-29 | Hydraulic systems utilizing combination open-and closed-loop pump systems |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103649562A CN103649562A (en) | 2014-03-19 |
| CN103649562B true CN103649562B (en) | 2016-11-30 |
Family
ID=
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1356223A (en) * | 2000-09-12 | 2002-07-03 | 株式会社小松制作所 | System for controlling operation of oil cylinde in vehicle |
| JP2003246239A (en) * | 2002-02-22 | 2003-09-02 | Kayaba Ind Co Ltd | Concrete mixer truck |
| JP2007278430A (en) * | 2006-04-10 | 2007-10-25 | Shin Meiwa Ind Co Ltd | Mixer drum driving device for truck mixer |
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1356223A (en) * | 2000-09-12 | 2002-07-03 | 株式会社小松制作所 | System for controlling operation of oil cylinde in vehicle |
| JP2003246239A (en) * | 2002-02-22 | 2003-09-02 | Kayaba Ind Co Ltd | Concrete mixer truck |
| JP2007278430A (en) * | 2006-04-10 | 2007-10-25 | Shin Meiwa Ind Co Ltd | Mixer drum driving device for truck mixer |
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