CN103097746B - Hydraulic energy regenerating unit - Google Patents
Hydraulic energy regenerating unit Download PDFInfo
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- CN103097746B CN103097746B CN201180043702.2A CN201180043702A CN103097746B CN 103097746 B CN103097746 B CN 103097746B CN 201180043702 A CN201180043702 A CN 201180043702A CN 103097746 B CN103097746 B CN 103097746B
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- Prior art keywords
- hydraulic
- generator
- regeneration
- hydraulic motor
- working oil
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Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/08—Superstructures; Supports for superstructures
- E02F9/10—Supports for movable superstructures mounted on travelling or walking gears or on other superstructures
- E02F9/12—Slewing or traversing gears
- E02F9/121—Turntables, i.e. structure rotatable about 360°
- E02F9/123—Drives or control devices specially adapted therefor
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/2217—Hydraulic or pneumatic drives with energy recovery arrangements, e.g. using accumulators, flywheels
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/14—Energy-recuperation means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/50—Pressure control
- F15B2211/505—Pressure control characterised by the type of pressure control means
- F15B2211/50509—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means
- F15B2211/50518—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means using pressure relief valves
- F15B2211/50527—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means using pressure relief valves using cross-pressure relief valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/80—Other types of control related to particular problems or conditions
- F15B2211/88—Control measures for saving energy
Abstract
A kind of mixing type hydraulic device, has: rotation hydraulic motor (1), and it makes rotary body (8) rotation; The direction switch valve (2) of 6 port 3 positions, it switches the direction of rotation of rotary body (8); Hydraulic pump (3), it is to hydraulic motor (1) transportation work oil for rotation; Engine (4), it drives hydraulic pump (3); Hydraulic energy regenerating unit (7), its motion by the working oil flowing out with hydraulic motor (1) from rotation can be transformed to electric energy. This hydraulic energy regenerating unit (7) has: regeneration hydraulic motor (102), and it is supplied to the working oil that return to fuel tank (5); Regeneration is connected in parallel with hydraulic motor (102) with relief valve (101), itself and regeneration; Generator (103), it drives with hydraulic motor (102) by regenerating.
Description
Technical field
The present invention relates to the hydraulic energy regenerating unit using in such as hydraulic crawler excavator etc.
Background technology
In the past, have at TOHKEMY 2000-136806 communique (patent documentation 1) about hydraulic energy regenerating unitThe device of middle record. This hydraulic energy regenerating unit has: hydraulic actuator, and it is supplied with pressure oil from hydraulic pump; EnergyChange of variable device, its motion by the returning pressure oil flowing out from this hydraulic actuator can be transformed to electric energy; And battery,It is accumulated by the electric energy after this converting means conversion.
Described energy converter is made up of hydraulic pump motor and electro-motor, and this hydraulic pump motor flows into from hydraulic actuationThe returning pressure oil that device flows out and produce driving force, this electro-motor is accepted the driving force that this hydraulic pump motor produces and is producedRaw electric energy.
, in above-mentioned existing hydraulic energy regenerating unit, make from the returning pressure oil of hydraulic actuator outflow wholeFlow into hydraulic pump motor. Therefore, described hydraulic pump motor is increased to large capacity. In existing hydraulic means, do not existThe space of this large hydraulic pump motor can be installed.
Therefore, existing hydraulic means is only done to less improvement, large hydraulic pump motor can not be arranged on to existing liquidIn pressure device, existence can not obtain the problem of regenerated energy.
Prior art document
Patent documentation
Patent documentation 1: TOHKEMY 2000-136806 communique
Summary of the invention
The problem that invention will solve
Therefore, problem of the present invention is to provide a kind of hydraulic energy regenerating unit, and existing hydraulic means is only done to less changingEnter, can obtain regenerated energy.
Summary of the invention
For the means of dealing with problems
In order to address the above problem, hydraulic energy regenerating unit of the present invention is characterised in that, this hydraulic energy regenerating unit toolHave:
Regeneration hydraulic motor, it is supplied to the working oil that return to fuel tank;
Relief valve, itself and described regeneration are connected in parallel with hydraulic motor; And
Generator, it is driven with hydraulic motor by described regeneration.
According to said structure, due to relief valve and described regeneration are connected in parallel with hydraulic motor, thereby can will provideSuppress for lower to the flow of the working oil of regeneration hydraulic motor. Therefore, can dwindle described regeneration hydraulic motor.
And, owing to can dwindling described regeneration hydraulic motor, thereby existing hydraulic means is only done to less improvement,Can be installed in existing hydraulic means. For example, for the existing hydraulic means with many valves portion and pilot valve portion,Do not need to change many valves portion and pilot valve portion, regeneration hydraulic motor can be installed.
And, if regeneration is installed in existing hydraulic means with hydraulic motor, can will should return to fuel tankWorking oil supply with regeneration hydraulic motor, by regeneration hydraulic motor-driving generator, obtain regenerated energy.
In the hydraulic energy regenerating unit of an embodiment, described hydraulic energy regenerating unit has:
Inverter, it is connected with described generator; And
Control device, it controls rotating speed or the torque of described generator by described inverter.
According to above-mentioned embodiment, described control device is controlled rotating speed or the torque of generator by inverter, byThis rotating speed that can prevent generator is excessive.
If the rotating speed of described generator is excessive, the load of generator increases, and heating also increases, thereby need to takeHeating countermeasure, causes the rising of manufacturing cost.
Therefore, prevent the excessive rising that can suppress manufacturing cost of rotating speed of described generator.
In the hydraulic energy regenerating unit of an embodiment, described hydraulic energy regenerating unit has pressure sensor, shouldPressure sensor detects the pressure that more leans on the working oil of upstream side than described regeneration hydraulic motor,
Described control device is according to the pressure of the working oil being detected by described pressure sensor, controls described generatorRotating speed or torque.
According to above-mentioned embodiment, described control device, according to the pressure of the working oil being detected by pressure sensor, is controlledThe rotating speed of generator processed or torque, thereby can control accurately the generated energy of generator.
And, because described control device is controlled generator according to the pressure of the working oil being detected by pressure sensorRotating speed or torque, thereby the response performance of this control is good.
In the hydraulic energy regenerating unit of an embodiment, described hydraulic energy regenerating unit has checkout gear, this inspectionSurvey device and detect in described regeneration the flow with the working oil passing through in hydraulic motor,
Described control device, according to the value being detected by described checkout gear, is controlled the rotating speed of described generator or turnsSquare.
According to above-mentioned embodiment, described control device, according to the value being detected by checkout gear, is controlled turning of generatorSpeed or torque, thereby can control accurately the generated energy of generator.
And, because described control device is controlled the rotating speed of generator or turns according to the value being detected by checkout gearSquare, thereby the response performance of this control is good.
In the hydraulic energy regenerating unit of an embodiment, described checkout gear is the rotation speed that detects described generatorThe rotation speed sensor of degree,
The value being detected by described checkout gear is revolving of the described generator that detected by described rotation speed sensorRotary speed.
According to above-mentioned embodiment, described control device is according to the rotation of the generator being detected by rotation speed sensorSpeed, controls rotating speed or the torque of generator, thereby can control accurately the generated energy of generator.
And, because described control device is controlled according to the rotary speed of the generator being detected by rotation speed sensorThe rotating speed of generator processed or torque, thereby the response performance of this control is good.
In the hydraulic energy regenerating unit of an embodiment, described checkout gear is to detect to use hydraulic pressure horse in described regenerationThe flow sensor of the flow of the working oil passing through in reaching,
The value being detected by described checkout gear is the flow of the working oil that detected by described flow sensor.
According to above-mentioned embodiment, described control device is according to the stream with the working oil passing through in hydraulic motor in regenerationThe flow of the working oil of measuring, detected by flow sensor, controls rotating speed or the torque of generator, thereby canControl accurately the generated energy of generator.
And, because described control device is controlled generator according to the flow of the working oil being detected by flow sensorRotating speed or torque, thereby the response performance of this control is good.
In the hydraulic energy regenerating unit of an embodiment, from the working oil of multiple actuators can with than more describedLife more converges by the working oil of upstream side with hydraulic motor.
According to above-mentioned embodiment, due to the working oil from described multiple actuators can with than regeneration hydraulic motorMore converge by the working oil of upstream side, thereby can obtain efficiently regenerated energy.
Invention effect
According to hydraulic energy regenerating unit of the present invention, this hydraulic energy regenerating unit has and is supplied to the work that return to fuel tankThe relief valve of making oily regeneration hydraulic motor and being connected in parallel with hydraulic motor with this regeneration, thereby can will carryThe flow of supplying with the working oil of regeneration hydraulic motor suppresses for lower, and then can dwindle regeneration hydraulic motor. CauseThis, as long as existing hydraulic means is done to less improvement, just can be installed on existing hydraulic pressure with hydraulic motor by regenerationDevice.
And, if regeneration is installed on to existing hydraulic means with hydraulic motor, can will should return to fuel tankWorking oil offers regeneration hydraulic motor, by regeneration hydraulic motor-driving generator, obtains regenerated energy.
Brief description of the drawings
Fig. 1 is the circuit with the mixing type hydraulic device of the hydraulic energy regenerating unit of the 1st embodiment of the present inventionFigure.
Fig. 2 illustrates the pressure of working oil of described hydraulic energy regenerating unit and the working oil of hydraulic energy regenerating unitThe curve map of the relation between flow.
Fig. 3 is the circuit diagram of the mixing type hydraulic device of comparative example.
Fig. 4 is the key diagram of the emulation (simulation) of the mixing type hydraulic device of the 1st embodiment of the present invention.
Fig. 5 is the curve map that described simulation result is shown.
Fig. 6 is the curve map that described simulation result is shown.
Fig. 7 is the curve map that described simulation result is shown.
Fig. 8 is the variation with the mixing type hydraulic device of the hydraulic energy regenerating unit of the 1st embodiment of the present inventionCircuit diagram.
Fig. 9 is the circuit diagram with the mixing type hydraulic device of the hydraulic energy regenerating unit of the 2nd embodiment of the present invention.
Figure 10 is the curve map that the relation between the rotary speed of generator and the torque of generator is shown.
Figure 11 is the distortion with the mixing type hydraulic device of the hydraulic energy regenerating unit of the 2nd embodiment of the present inventionThe circuit diagram of example.
Figure 12 is the mixing type hydraulic dress with the variation of the hydraulic energy regenerating unit of the 2nd embodiment of the present inventionThe circuit diagram of the variation of putting.
Detailed description of the invention
Illustrate in greater detail hydraulic energy regenerating unit of the present invention according to illustrated embodiment below.
[the 1st embodiment]
Fig. 1 is by the hydraulic energy regenerating unit of the rearmounted the present invention of installation the 1st embodiment in existing hydraulic means7, and a part of relief valve is changed to the circuit diagram of the mixing type hydraulic device obtaining after sequence valve. Release existingPut in valve, carry out the switching of valve using the pressure differential of primary side, secondary side as setting pressure, but due at secondaryHydraulic energy regenerating unit 7 is put in rear flank, thereby becomes the setting pressure higher than the past. By being made as sequence valve, Neng GouyuExisting product is set as the pressure differential between tank pressure in the same manner, thereby can make entrance (meter-in)/outlet(meter-out) pressure is identical with existing product, and reaches the acceleration/deceleration torque identical with existing product.
Described mixing type hydraulic device has: hydraulic motor 1 for rotation, and it rotates rotary body 8; 63 of portsThe direction switch valve 2 of putting, it switches the direction of rotation of rotary body 8; Hydraulic pump 3, it is to hydraulic motor 1 for rotationTransportation work oil; Engine 4, it drives hydraulic pump 3.
Described hydraulic pump 3 is the hydraulic pumps such as gear pump, trochoid pump, vane pump, piston pump, sucks work from fuel tank 5Do oil ejection.
Described direction switch valve 2 is connected with hydraulic pump 3 by the 1st pipe arrangement 51, by the 2nd pipe arrangement 52 and the 3rdPipe arrangement 53 is connected with hydraulic motor 1 with rotation. This direction switch valve 2 has the 1st and the 2nd pilot pressure receiving portion2a, 2b, the 1st pilot pressure receiving portion 2a is connected with pilot valve 6 by the 1st guide's pipe arrangement 61, the 2nd first pilotPower receiving portion 2b is connected with pilot valve 6 by the 2nd guide piping 62. The the 1st and the 2nd pilot pressure receiving portion2a, 2b accept pilot pressure, and the neutral position of the position of direction switch valve 2 from figure switches to dextrorotation position thus(position on the right side in figure) or left-handed position (position in the left side in figure). And, described pilot valve 6 withNot shown pioneer pump connects.
In described neutral position, the 1st port P1 and the 4th port P4 are interconnected, the 2nd port P2, the 3rd endMouth P3, the 5th port P5 and the 6th port P6 are in off-state. Now, the working oil being sprayed by hydraulic pump 3By after the 1st, the 4th port P1, P4, in the 4th, the 5th pipe arrangement 54,55, flow through and return to fuel tank 5.
In described dextrorotation position, the 2nd port P2 and the 6th port P6 are interconnected, the 3rd port P3 and the 5th endMouth P5 is interconnected, and the 1st port P1 and the 4th port P4 are in off-state. Now, sprayed by hydraulic pump 3Working oil by after the 2nd port P2, the 6th port P6, in the 3rd pipe arrangement 53, flow through and supply with rotation and useHydraulic motor 1.
In described left-handed position, the 2nd port P2 and the 5th port P5 are interconnected, the 3rd port P3 and the 6th endMouth P6 is interconnected, and the 1st port P1 and the 4th port P4 are in off-state. Now, by described hydraulic pump 3The working oil of ejection, by after the 2nd port P2, the 5th port P5, flows through and supplies with and revolve in the 2nd pipe arrangement 52Conversion hydraulic motor 1.
Be provided with the 1st check valve 11 at described the 1st pipe arrangement 51. It is the 1st unidirectional that one end of the 6th pipe arrangement 56 is connected toBetween valve 11 and hydraulic pump 3. And, be provided with relief valve 21 at described the 6th pipe arrangement 56, for making the 1st pipe arrangementThe pressure of the working oil in 51 is no more than predetermined value.
One end of the 7th pipe arrangement 57, the 8th pipe arrangement 58 is connected in described the 2nd pipe arrangement 52, the 7 pipe arrangements the 57, the 8thPipe arrangement 58 is connected in the 3rd pipe arrangement 53. At described the 7th pipe arrangement 57, the 1st, the 2nd sequence valve 22,23 is set, usesThe pressure of the working oil in making the 2nd, the 3rd pipe arrangement 52,53 is no more than predetermined value (for example 28MPa). The opposing partyFace arranges the 2nd, the 3rd check valve 12,13 in described the 8th pipe arrangement 58, for make the 2nd, the 3rd pipe arrangement 52,In 53, can not become vacuum.
Described the 1st sequence valve 22 has the inflow entrance that is connected with the 2nd pipe arrangement 52 by the 7th pipe arrangement 57 and will be fromThe ejiction opening of the working oil ejection that this inflow entrance flows into. Flow to the 9th pipe arrangement 59 from the working oil of this ejiction opening ejection.
Described the 2nd sequence valve 23 has the inflow entrance that is connected with the 3rd pipe arrangement 53 by the 7th pipe arrangement 57 and will be fromThe flow export of the working oil ejection that this inflow entrance flows into. Flow to the 9th pipe arrangement 59 from the working oil of this ejiction opening ejection.
And described mixing type hydraulic device adopts so-called hydraulic shunting mode, have and will use hydraulic motor 1 from rotatingThe motion of the working oil flowing out can be transformed to the hydraulic energy regenerating unit 7 of electric energy. This hydraulic energy regenerating unit 7 has againRaw by relief valve 101, regeneration hydraulic motor 102, generator 103, inverter 104, electrical storage device 105, pressurePower sensor 106, control device 107. In addition, regeneration is examples for relief valve of the present invention with relief valve 101.
Described regeneration is connected to the 1st order with one end that relief valve 101 is located at the 9th pipe arrangement 59, the 9 pipe arrangements 59Between valve 22 and the 2nd sequence valve 23. Thus, described regeneration is passed through the 9th pipe arrangement with the inflow entrance of relief valve 10159 are connected with the ejiction opening of the 7th pipe arrangement 57 and the 1st, the 2nd sequence valve 22,23. This is relief valve 101 for regenerationPressure set points be set to the pressure set points lower than the 1st, the 2nd sequence valve 22,23. For example,, if willThe pressure set points of described the 1st, the 2nd sequence valve 22,23 is set as 28MPa, will regenerate with relief valve 101Pressure set points be set as 21MPa.
The supply of working oil is accepted in described regeneration with hydraulic motor 102, drive generator 103. Hydraulic pressure horse is used in this regenerationReach 102 and be located at regeneration pipe arrangement 108, and be connected in parallel with relief valve 101 with regeneration. , described regeneration hydraulic pressureThe ejiction opening that motor 102 is connected to the 1st, the 2nd sequence valve 22,23 and regeneration with the inflow entrance of relief valve 101 itBetween.
Described inverter 104 is connected with generator 103, and controls the frequency of the electric current that offers generator 103. LogicalCross and change this frequency, can control rotating speed or the torque of generator 103, and adjust the generated energy of generator 103.
Described electrical storage device 105 is connected with generator 103 by inverter 104, and accumulates by generator 103 and generate electricityElectric power. This electric power is used by not shown electric device, can obtain energy-saving effect.
Described pressure sensor 106 detects the ejiction opening and regeneration relief valve 101 of the 1st, the 2nd sequence valve 22,23Inflow entrance between the pressure of working oil. And, the working oil that described pressure sensor 106 detects expressionThe pressure signal of pressure sends to control device 107.
Described control device 107 is controlled rotating speed or the torque of generator 103 by inverter 104. More particularly,Described control device 107, according to the pressure signal from pressure sensor 106, transmits control signal to inverter 104.
And, in described hydraulic energy regenerating unit 7, can make from the working oil of multiple actuators with than regeneration useHydraulic motor 102 more converges by the working oil of upstream side. That is, although do not illustrate, at described the 9th pipe arrangementIn 59 with the position that is connected with one end of pipe arrangement 108 of regeneration, be provided with can connecting pipings connector, this pipe arrangementBe used for making working oil to be back to fuel tank 5 from multiple actuators.
Fig. 2 is the pressure of working oil and the working oil of hydraulic energy regenerating unit 7 that described hydraulic energy regenerating unit 7 is shownFlow between the curve map of relation.
The rotating speed of generator 103 or the control of torque undertaken by described control device 107 are can obtain songThe mode of solid line, single-point line and dotted line in line chart is carried out.
Described solid line represents the ejiction opening of the 1st, the 2nd sequence valve 22,23 and the inflow entrance of regeneration relief valve 101Between working oil pressure and regeneration for the relation between the flow of the working oil passing through in relief valve 101.
Described single-point line represents the ejiction opening of the 2nd sequence valve 23 and regenerates and use between the inflow entrance of relief valve 101The pressure of working oil and regeneration for the relation between the flow of the working oil passing through in hydraulic motor 102.
Described dotted line represents ejiction opening and the work of regeneration between the inflow entrance of relief valve 101 of the 2nd sequence valve 23Relation between the pressure of oil and total flow. Wherein, described total flow is equivalent at regeneration relief valve 101In the flow and the total flow with the flow of the working oil passing through in hydraulic motor 102 in regeneration of the working oil that passes through.
In the mixing type hydraulic device of said structure, due to relief valve 101 and regeneration hydraulic motor for regeneration102 are connected in parallel, thereby can be compared with rill by the flow inhibition of the working oil that offers regeneration hydraulic motor 102Amount. Therefore, can dwindle described hydraulic motor 102 for regeneration.
And, owing to can dwindling described hydraulic motor 102 for regeneration, thereby do not need modification as direction switch valve 2With pilot valve 6, hydraulic energy regenerating unit 7 can be placed on to hydraulic means.
And, offer regeneration hydraulic motor 102 owing to should returning to the working oil of described fuel tank 5, thereby energyEnough use hydraulic motor 102 to drive generator 103 to obtain regenerated energy by regeneration.
And, owing to can dwindling described hydraulic motor 102 for regeneration, thereby as long as change a little existing hydraulic pressure dressThe design of putting, just can design can be by the hydraulic means of hydraulic energy regenerating unit 7 postposition.
And, if the design of existing hydraulic means is only done to less change, do not need that new production is set and establishStandby.
And, even in the time carrying out described hydraulic energy regenerating unit 7 rearmounted, only by rotation hydraulic motor 1Rotary body 8 is rotated, thereby the operation sense of rotary body 8 is identical with before after pad pressure energy regenerating unit 7.
And, in postposition in the hydraulic means of described hydraulic energy regenerating unit 7, even the holding of electrical storage device 105When electric weight is 0%, also can only utilize hydraulic pressure that rotary body 8 is rotated.
And, in postposition in the hydraulic means of described hydraulic energy regenerating unit 7, with the charge capacity of electrical storage device 105Irrelevant, can only utilize hydraulic pressure that the rotary speed of rotary body 8 is slowed down.
And, in postposition in the hydraulic means of described hydraulic energy regenerating unit 7, if the charge capacity of electrical storage device connectsNearly 100%, can stop regeneration. Therefore, can simplify the charging and discharging control of described electrical storage device 105.
And, even when described regeneration is broken down with hydraulic motor 102 and generator 103, also can adopt withThe front identical using method of after pad pressure energy regenerating unit 7 operates.
And, if in the time that problem occurs described hydraulic energy regenerating unit 7, allow to by the handover operation merit of regeneratingCan disconnect, ensure transaction capabilities, during can shortening the operational test of hydraulic energy regenerating unit 7, make to protect liquidThe device of pressure energy regenerating unit 7 becomes simple.
And, because described control device 107 is controlled the rotating speed of generator 103 by inverter 104, thereby canThe rotary speed that prevents generator 103 is excessive.
And if the rotary speed of described generator 103 is excessive, the voltage of regeneration increases, will cause equipment to damageWound. And, because the heating of described generator 103 increases, needs are taked to the countermeasure of generating heat, cause manufacturing costRise.
Therefore, prevent the excessive rising that can suppress manufacturing cost of rotary speed of described generator 103.
And described control device 107 is controlled and is sent out according to the pressure of the working oil being detected by pressure sensor 106The rotating speed of motor 103 or torque, thereby can control accurately the generated energy of generator 103.
And, because described control device 107 is controlled according to the pressure of the working oil being detected by pressure sensor 106The rotating speed of generator 103 processed or torque, thereby the response performance of this control is good.
Fig. 3 is the circuit diagram of the mixing type hydraulic device of comparative example. In this Fig. 3, for the formation shown in Fig. 1The identical component part of part mark identical with component part in Fig. 1 with reference to label, and description thereof is omitted.
Described mixing type hydraulic device adopts so-called oily electric hybrid mode, has: electro-motor 9, its auxiliary rotation is usedHydraulic motor 1; The 10th pipe arrangement 60, it will be directed to from the working oil of the 2nd, the 3rd relief valve 122,123 ejectionsFuel tank 5. At the 10th pipe arrangement 60, regeneration relief valve 101 is not set, does not connect one of regeneration pipe arrangement 108 yetEnd.
In described mixing type hydraulic device, need to make the rotation torque of hydraulic motor 1 and the torque of electro-motor 9Aggregate value, with the rotation of existing hydraulic means (non-mixed hydraulic means) with the torque phase of hydraulic motor 1 with.Therefore, need to rotation be reduced suitable with the auxiliary quantity of electro-motor with inlet pressure and the outlet pressure of hydraulic motor 1Amount.
Therefore, in the situation that transforming existing hydraulic means as mixing type hydraulic device, need to reduce release pressure,And for lever position, need to proofread and correct entrance throttle, speed control muffler and emit the complete of choke valve to open sideThe aperture area of portion, thereby this transformation is more difficult.
And, the torque of described electro-motor 9 is being made as to 1/3 situation of the deceleration torque based on discharging in the pastUnder, electro-motor 9 is mechanically directly connected with rotary body 8, the speed of the rotating speed of electro-motor 9 and rotary body 8Proportional, thereby theoretical regenerated energy reaches 1/3 of rotating energy.
On the other hand, in the theoretical regenerated energy of the mixing type hydraulic device of present embodiment, regeneration hydraulic motor102 rotary speed can be set arbitrarily, does not rely on the speed of rotary body 8, thereby reaches 5/9 of rotating energy.
Therefore, the theoretical regenerated energy of the mixing type hydraulic device of present embodiment is the mixing type hydraulic device of comparative exampleApproximately 2 times of theoretical regenerated energy.
Fig. 4 is the key diagram of the emulation of the mixing type hydraulic device of present embodiment.
In above-mentioned emulation, be set as rotation hydraulic motor 1 with 1500min－1, speed control muffler full cut-off approximately 0.2Second, by discharging the state that slows down and stop, time of calculating pressure P1, P2 changes and the flow Q1 of working oil～The time of Q5 changes. And, in above-mentioned emulation, for hydraulic motor 1 for rotation, be set as initial velocity1500min－1, volume 150cc/rev, motor drive shaft conversion inertia 8.45kgm2, the 1st and the 2nd sequence valve 22 and 23Pressure set points 28MPa, the pressure set points 16MPa of relief valve 101 for regeneration.
The time of above-mentioned pressure P 1, P2 changes as shown in the curve map of Fig. 5. Effect in regeneration with relief valve 101Under, above-mentioned pressure P 2 maintains about 16MPa in during approximately 0.2 second～approximately 1.6 seconds. And, above-mentioned pressure P 2During approximately 1.6 seconds～approximately 2.2 seconds, only controlled by generator 103.
The time of the flow Q1～Q3 of above-mentioned working oil changes as shown in the curve map of Fig. 6. This flow Q2 is outletFlow, the position by direction switch valve 2 from dextrorotation position or left-handed position return to neutral position, this flow Q2During approximately 0.2 second, reach 0, after approximately 0.2 second, all flow towards hydraulic energy regenerating unit 7 with flow Q1.In addition, in the curve map of Fig. 6, exaggerate showing 0.0 second～flow Q1 during approximately 0.1 second and flow Q2 poor,Also exaggerate showing 0.2 second～flow Q1 during approximately 2.1 seconds and flow Q3 poor.
The time of the flow Q3～Q5 of above-mentioned working oil changes as shown in the curve map of Fig. 7. This flow Q3, Q4 are notHave flow regular time, but during approximately 0.2 second～approximately 1.6 seconds, flow Q5 is regenerated and is used hydraulic pressure by controlThe rotary speed of motor 102 and reach firm discharge, thereby the generated energy that can be fixed in generator 103.And after approximately 1.6 seconds, flow Q5 and flow Q3 decline in the same manner.
Like this, described flow Q5 is suppressed to compared with low discharge, thereby can make the capacity of regeneration hydraulic motor 102For low capacity, can dwindle regeneration relief valve 101.
In above-mentioned the 1st embodiment, even there is no inverter 104 and control device 107, also can obtain againRaw energy.
In above-mentioned the 1st embodiment, the position being connected with one end of pipe arrangement 108 with regeneration in the 9th pipe arrangement 59Connector is set, but also can as shown in Figure 8, uses pipe arrangement 71 to connect multiple hydraulic pressure at this connector by cylinderCylinder 81A, 81B ... Like this, can obtain efficiently regenerated energy. In addition, multiple hydraulic cylinder 81A, 81B,It is an example of actuator of the present invention. And, 82A, 82B in Fig. 8 ... order of representation valve.
[the 2nd embodiment]
Fig. 9 is by the hydraulic energy regenerating unit of rearmounted the 2nd embodiment of the present invention in existing hydraulic meansThe circuit diagram of the mixing type hydraulic device obtaining after 207. And, in Fig. 9, for the formation portion shown in Fig. 1Point identical component part mark identical with the component part in Fig. 1 with reference to label, and description thereof is omitted.
Described hydraulic energy regenerating unit 207 has: rotation speed sensor 306, it detects the rotation of generator 103Speed; Control device 307, it is according to the rotation speed of the generator 103 being detected by this rotation speed sensor 306Degree, controls rotating speed or the torque of generator 103. In addition, rotation speed sensor 306 is examples for checkout gear.
Figure 10 is the curve that the relation between the rotary speed of described generator 103 and the torque of generator 103 is shownFigure.
The rotating speed of described control device 307 to generator 103 or the control of torque are can obtain in curve mapThe mode of solid line carry out. More particularly, in the time that the rotary speed of generator 103 reaches R1 from 0, adjustThe haircut torque of motor 103, makes the torque of generator 103 roughly fixing. And, in the rotation of generator 103When speed reaches R2, the torque of generator 103 is sharply increased, suppress the increase of the rotary speed of generator 103.
And in the time that the rotary speed of described generator 103 reaches R2, the torque of generator 103 is T2, but shouldT2 is the pressure set points with relief valve 101 corresponding to regeneration. Therefore, sharply increase in the torque that makes generator 103Time, regeneration is opened with relief valve 101.
According to the mixing type hydraulic device of said structure, control device 307 is controlled generator 103 by inverter 104Rotating speed, can prevent that thus the rotary speed of generator 103 is excessive.
If the rotary speed of described generator 103 is excessive, the heating that causes generator 103 is increased, thereby needTake the countermeasure of generating heat, cause the rising of manufacturing cost.
Therefore, prevent the excessive rising that can suppress manufacturing cost of rotary speed of described generator 103.
And described control device 307 is according to the rotation of the generator 103 being detected by rotation speed sensor 306Speed, controls rotating speed or the torque of generator 103, thereby can control accurately the generated energy of generator 103.
And, because described control device 307 is according to the generator 103 being detected by rotation speed sensor 306Rotary speed control rotating speed or the torque of generator 103, thereby the response performance of this control is good.
But, about precision or the response performance of the control of the generated energy of described generator 103, or the above-mentioned the 1stEmbodiment is relatively good.
In above-mentioned the 2nd embodiment, even there is no inverter 104 and control device 307, also can obtain againRaw energy.
In above-mentioned the 2nd embodiment, the position being connected with one end of pipe arrangement 108 with regeneration in the 9th pipe arrangement 59Connector is set, but also can as shown in figure 11, uses pipe arrangement 71 to connect multiple hydraulic pressure at this connector by cylinderCylinder 81A, 81B ... Like this, can obtain efficiently regenerated energy. In addition, multiple hydraulic cylinder 81A, 81B,It is an example of actuator of the present invention. And, 82A, 82B in Figure 11 ... order of representation valve.
In above-mentioned the 2nd embodiment, hydraulic energy regenerating unit 207 is placed in mixing type hydraulic device, but alsoCan as shown in figure 12, hydraulic energy regenerating unit 407 be placed in mixing type hydraulic device. This hydraulic energy regenerationDevice 407 flow sensor 506 and the control device 507 that have as an example of checkout gear. Described flow passesSensor 506 detects the flow at the regeneration working oil passing through in hydraulic motor 102. And, described control device507 according to the flow of the working oil being detected by flow sensor 506, controls rotating speed or the torque of generator 103.According to this hydraulic energy regenerating unit 407, also can obtain the action effect identical with hydraulic energy regenerating unit 207.
And, also can in the mixing type hydraulic device shown in Figure 12, use cylinder pipe arrangement as shown in figure 1171 such pipe arrangements. ,, in described mixing type hydraulic device, also can arrange the work from multiple actuatorsMake oil and be directed to the pipe arrangement that more leans on upstream side than regeneration hydraulic motor 102.
Be illustrated about the specific embodiment of the present invention, but the invention is not restricted to the above-mentioned the 1st and the 2nd enforcement sideFormula, can carry out within the scope of the invention various changes and implement. For example, also can be by the above-mentioned the 1st and the 2ndThe appropriately combined mode obtaining is carried out in embodiment and distortion thereof, as an embodiment of the invention.
Label declaration
1 rotation hydraulic motor; 2 direction switch valves; 3 hydraulic pumps; 4 engines; 5 fuel tanks; 6 pilot valves; 7,207,407 hydraulic energy regenerating units; 8 rotary bodies; 9 electro-motors; 81A, 81B cylinder; 101 regeneration relief valves;102 regeneration hydraulic motors; 103 generators; 104 inverters; 105 electrical storage devices; 106 pressure sensors; 107,307,507 control device; 306 rotation speed sensors; 506 flow sensors.
Claims (6)
1. a mixing type hydraulic device, is characterized in that,
This mixing type hydraulic device has:
Rotation hydraulic motor (1), it is for making rotary body (8) rotation;
Hydraulic pump (3), it is to described hydraulic motor (1) transportation work oil for rotation;
Sequence valve (22,23), it is no more than predetermined value for the pressure that makes the working oil in following pipe arrangement, this pipe arrangementBe used for connecting the direction switch valve (2) and described rotation hydraulic motor of the direction of rotation of switching described rotary body (8)(1); And
Hydraulic energy regenerating unit (7,207,407),
Described hydraulic energy regenerating unit (7,207,407) has:
Regeneration with hydraulic motor (102), its be supplied to should from described for rotation hydraulic motor (1) via described suitableOrder valve (22,23) returns to the working oil of fuel tank;
Relief valve (101), itself and described for regeneration hydraulic motor (102) be connected in parallel;
Generator (103), its by described for regeneration hydraulic motor (102) drive;
Inverter (104), it is connected with described generator (103); And
Control device (107,307,507), it controls described generator (103) by described inverter (104)Rotating speed or torque.
2. mixing type hydraulic device according to claim 1, is characterized in that,
Described hydraulic energy regenerating unit (7) has pressure sensor (106), and this pressure sensor (106) detects ratioDescribed for regeneration hydraulic motor (102) more by the pressure of the working oil of upstream side,
Described control device (107), according to the pressure of the working oil being detected by described pressure sensor (106), is controlledMake rotating speed or the torque of described generator (103).
3. mixing type hydraulic device according to claim 1, is characterized in that,
Described hydraulic energy regenerating unit (207,407) has checkout gear (306,506), this checkout gear (306,506) detect the flow at the described working oil passing through in hydraulic motor (102) for regeneration,
Described control device (307,507), according to the value being detected by described checkout gear (306,506), is controlledRotating speed or the torque of described generator (103).
4. mixing type hydraulic device according to claim 3, is characterized in that,
Described checkout gear (306) is the rotation speed sensor that detects the rotary speed of described generator (103)(306)，
The value being detected by described checkout gear (306) is the institute being detected by described rotation speed sensor (306)State the rotary speed of generator (103).
5. mixing type hydraulic device according to claim 3, is characterized in that,
Described checkout gear (506) is the stream detecting at the described working oil passing through in hydraulic motor (102) for regenerationThe flow sensor (506) of amount,
The value being detected by described checkout gear (506) is the working oil being detected by described flow sensor (506)Flow.
6. according to the mixing type hydraulic device described in any one in claim 1～5, it is characterized in that, from itThe working oil of his multiple actuators (81A, 81B) can with than described sequence valve (22,23) more downstream andThan described for regeneration hydraulic motor (102) more converge by the working oil of upstream side.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010209586 | 2010-09-17 | ||
| JP2010-209586 | 2010-09-17 | ||
| JP2011-174116 | 2011-08-09 | ||
| JP2011174116A JP5035463B2 (en) | 2010-09-17 | 2011-08-09 | Hybrid hydraulic system |
| PCT/JP2011/069391 WO2012035964A1 (en) | 2010-09-17 | 2011-08-29 | Hydraulic energy regeneration device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103097746A CN103097746A (en) | 2013-05-08 |
| CN103097746B true CN103097746B (en) | 2016-05-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201180043702.2A Active CN103097746B (en) | 2010-09-17 | 2011-08-29 | Hydraulic energy regenerating unit |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP5035463B2 (en) |
| CN (1) | CN103097746B (en) |
| WO (1) | WO2012035964A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP6019828B2 (en) * | 2012-07-03 | 2016-11-02 | ダイキン工業株式会社 | Hydraulic regeneration device |
| JP2014013045A (en) * | 2012-07-03 | 2014-01-23 | Daikin Ind Ltd | Hydraulic recovery apparatus |
| JP2014066259A (en) * | 2012-09-24 | 2014-04-17 | Daikin Ind Ltd | Hybrid type hydraulic device |
| CN102888876A (en) * | 2012-10-31 | 2013-01-23 | 三一重机有限公司 | Energy regeneration structure of excavator and excavator |
| JP2014167219A (en) * | 2013-02-28 | 2014-09-11 | Kayaba Ind Co Ltd | Hybrid construction machine, controller, and write processing method for non-volatile memory |
| JP2014228033A (en) * | 2013-05-20 | 2014-12-08 | 住友重機械工業株式会社 | Regeneration circuit of hydraulic motor, construction machine having regeneration circuit and control method of regeneration circuit of hydraulic motor |
| JP5858019B2 (en) * | 2013-09-18 | 2016-02-10 | ダイキン工業株式会社 | Construction machinery |
| JP6166995B2 (en) * | 2013-09-27 | 2017-07-19 | Ｋｙｂ株式会社 | Hybrid construction machine control system |
| CN103643717B (en) * | 2013-12-13 | 2016-04-06 | 中联重科股份有限公司渭南分公司 | The walking hydraulic test system of excavator and the method for testing of hydraulic travel system thereof |
| CN103697023B (en) * | 2013-12-26 | 2015-10-28 | 浙江德泰机电工程有限公司 | For the energy regenerating of the rotary braking of engineering machinery and the electrohydraulic system of release |
| KR101847760B1 (en) * | 2014-04-03 | 2018-04-10 | 히다찌 겐끼 가부시키가이샤 | Construction machine |
| CN103899603B (en) * | 2014-04-16 | 2016-01-06 | 山东理工大学 | A kind of braking and collection of energy for hydraulic pressure oil cooled device when turning to |
| CN104832464B (en) * | 2015-05-23 | 2016-10-26 | 长安大学 | A kind of rotary drilling rig master winch transfers potential energy recovery device |
| KR102462668B1 (en) * | 2015-06-10 | 2022-11-03 | 현대두산인프라코어(주) | Control apparatus and control method for a construction machinery |
| CN106122188B (en) * | 2016-08-12 | 2018-07-10 | 华侨大学 | Conventional overflow valve overflow loss recycle and reuse system based on hydraulic accumulator |
| CN112936972A (en) * | 2021-02-08 | 2021-06-11 | 吕言 | Hydraulic control device and control method for hydraulic machine |
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Also Published As
| Publication number | Publication date |
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| CN103097746A (en) | 2013-05-08 |
| WO2012035964A1 (en) | 2012-03-22 |
| JP2012082953A (en) | 2012-04-26 |
| JP5035463B2 (en) | 2012-09-26 |
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