CN103097746A - Hydraulic energy regeneration device - Google Patents
Hydraulic energy regeneration device Download PDFInfo
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- CN103097746A CN103097746A CN2011800437022A CN201180043702A CN103097746A CN 103097746 A CN103097746 A CN 103097746A CN 2011800437022 A CN2011800437022 A CN 2011800437022A CN 201180043702 A CN201180043702 A CN 201180043702A CN 103097746 A CN103097746 A CN 103097746A
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- 230000008929 regeneration Effects 0.000 title claims abstract description 80
- 238000011069 regeneration method Methods 0.000 title claims abstract description 80
- 238000001514 detection method Methods 0.000 claims description 18
- 239000002828 fuel tank Substances 0.000 claims description 11
- 238000011144 upstream manufacturing Methods 0.000 claims description 7
- 239000003921 oil Substances 0.000 abstract description 137
- 239000010720 hydraulic oil Substances 0.000 abstract 3
- 238000009434 installation Methods 0.000 description 24
- 238000010586 diagram Methods 0.000 description 10
- 239000007787 solid Substances 0.000 description 10
- 238000004519 manufacturing process Methods 0.000 description 7
- 230000004044 response Effects 0.000 description 7
- 230000000630 rising effect Effects 0.000 description 6
- 230000001172 regenerating effect Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000006872 improvement Effects 0.000 description 4
- 238000004088 simulation Methods 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 230000007935 neutral effect Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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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
-
- 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
-
- 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
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- Fluid-Pressure Circuits (AREA)
- Operation Control Of Excavators (AREA)
Abstract
A hybrid hydraulic device is provided with: a hydraulic motor (1) for rotation which rotates a rotating body (8); a 6-port 3-position direction-switching valve (2) which switches the rotation direction of the rotating body (8); a hydraulic pump (3) which delivers hydraulic oil to the hydraulic motor (1) for rotation; an engine (4) which drives the hydraulic pump (3); and a hydraulic energy regeneration device (7) which converts the kinetic energy of the hydraulic oil which has flowed out of the hydraulic motor (1) for rotation into electrical energy. This hydraulic energy regeneration device (7) has: a hydraulic motor (102) for regeneration, to which the hydraulic oil which is to be returned to an oil tank (5) is supplied; a relief valve (101) for regeneration, which is connected in parallel to the hydraulic motor (102) for regeneration; and a generator (103) which is driven by the hydraulic motor (102) for regeneration.
Description
Technical field
The present invention relates to such as the hydraulic energy reclaimer that uses in hydraulic shovel etc.
Background technique
In the past, the device of putting down in writing is arranged about the hydraulic energy reclaimer in TOHKEMY 2000-136806 communique (patent documentation 1).This hydraulic energy reclaimer has: hydraulic actuator, and it is supplied with pressure oil from oil hydraulic pump; Energy converter, the motion of the returning pressure oil that it will flow out from this hydraulic actuator can be transformed to electric energy; And battery, it is accumulated by the electric energy after this converter conversion.
Described energy converter is made of hydraulic pump motor and electric motor, and this hydraulic pump motor flows into from the returning pressure oil of hydraulic actuator outflow and produces driving force, and this electric motor is accepted the driving force of this hydraulic pump motor generation and produced electric energy.
, in above-mentioned existing hydraulic energy reclaimer, make the returning pressure oil that flows out from hydraulic actuator all flow into hydraulic pump motor.Therefore, described hydraulic pump motor is increased to large capacity.There is not the space that this large hydraulic pump motor can be installed in existing hydraulic pressure installation.
Therefore, existing hydraulic pressure installation is only done less improvement, large hydraulic pump motor can not be arranged in existing hydraulic pressure installation, existence can not obtain the problem of regenerated energy.
The 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 reclaimer, and existing hydraulic pressure installation is only done less improvement, can obtain regenerated energy.
Summary of the invention
For the means of dealing with problems
In order to address the above problem, hydraulic energy reclaimer of the present invention is characterised in that, this hydraulic energy reclaimer has:
Oil hydraulic motor is used in regeneration, and it is supplied to the working oil that return to fuel tank;
Relief valve, itself and described regeneration are connected in parallel with oil hydraulic motor; And
Generator, it is driven with oil hydraulic motor by described regeneration.
According to said structure, due to relief valve and described regeneration are connected in parallel with oil hydraulic motor, thereby can suppress for lower offering the flow of regeneration with the working oil of oil hydraulic motor.Therefore, can dwindle described regeneration oil hydraulic motor.
And, owing to can dwindle described regeneration oil hydraulic motor, thereby existing hydraulic pressure installation only being done less improvement, can be installed in existing hydraulic pressure installation.For example, for the existing hydraulic pressure installation with many valves section and pilot valve section, need not change many valves section and pilot valve section, the regeneration oil hydraulic motor can be installed.
And, be installed in existing hydraulic pressure installation with oil hydraulic motor if will regenerate, the working oil that should return to fuel tank can be supplied with the regeneration oil hydraulic motor, use hydraulic motor-driving generator by regeneration, obtain regenerated energy.
In the hydraulic energy reclaimer of a mode of execution, described hydraulic energy reclaimer has:
Inverter, it is connected with described generator; And
Control gear, it controls rotating speed or the torque of described generator by described inverter.
According to above-mentioned mode of execution, described control gear is controlled rotating speed or the torque of generator by inverter, can prevent that thus the rotating speed of generator is excessive.
If the rotating speed of described generator is excessive, the load of generator increases, and heating also increases, thereby need to take the countermeasure of generating heat, and causes the rising of manufacture cost.
Therefore, prevent the excessive rising that can suppress manufacture cost of rotating speed of described generator.
In the hydraulic energy reclaimer of a mode of execution, described hydraulic energy reclaimer has pressure transducer, and this pressure transducer detects than described regeneration and more leans on the pressure of the working oil of upstream side with oil hydraulic motor,
Described control gear is controlled rotating speed or the torque of described generator according to the pressure by the detected working oil of described pressure transducer.
According to above-mentioned mode of execution, described control gear is controlled rotating speed or the torque of generator according to the pressure by the detected working oil of pressure transducer, thereby can control accurately the generated energy of generator.
And because described control gear basis is controlled rotating speed or the torque of generator by the pressure of the detected working oil of pressure transducer, thereby the response performance of this control is good.
In the hydraulic energy reclaimer of a mode of execution, described hydraulic energy reclaimer has detection device, and this detection device detects the flow of the working oil that passes through in oil hydraulic motor in described regeneration,
Described control gear is controlled rotating speed or the torque of described generator according to by the detected value of described detection device.
According to above-mentioned mode of execution, described control gear is controlled rotating speed or the torque of generator according to by the detected value of detection device, thereby can control accurately the generated energy of generator.
And because described control gear basis is controlled rotating speed or the torque of generator by the detected value of detection device, thereby the response performance of this control is good.
In the hydraulic energy reclaimer of a mode of execution, described detection device is the rotation speed sensor that detects the rotational speed of described generator,
Rotational speed by the detected described generator of described rotation speed sensor by the detected value of described detection device.
According to above-mentioned mode of execution, described control gear is controlled rotating speed or the torque of generator according to the rotational speed by the detected generator of rotation speed sensor, thereby can control accurately the generated energy of generator.
And because described control gear basis is controlled rotating speed or the torque of generator by the rotational speed of the detected generator of rotation speed sensor, thereby the response performance of this control is good.
In the hydraulic energy reclaimer of a mode of execution, described detection device is the flow transducer that detects the flow of the working oil that passes through in oil hydraulic motor in described regeneration,
Flow by the detected working oil of described flow transducer by the detected value of described detection device.
According to above-mentioned mode of execution, described control gear is according to the flow of the working oil that passes through in oil hydraulic motor in regeneration, namely by the flow of the detected working oil of flow transducer, control rotating speed or the torque of generator, thereby can control accurately the generated energy of generator.
And because described control gear basis is controlled rotating speed or the torque of generator by the flow of the detected working oil of flow transducer, thereby the response performance of this control is good.
In the hydraulic energy reclaimer of a mode of execution, from the working oil of a plurality of actuators can with more converge by the working oil of upstream side with oil hydraulic motor than described regeneration.
According to above-mentioned mode of execution, due to from the working oil of described a plurality of actuators can with more converge by the working oil of upstream side with oil hydraulic motor than regeneration, thereby can obtain efficiently regenerated energy.
The invention effect
According to hydraulic energy reclaimer of the present invention, this hydraulic energy reclaimer has the regeneration that is supplied to the working oil that return to fuel tank with oil hydraulic motor and the relief valve that is connected in parallel with oil hydraulic motor with this regeneration, thereby can suppress for lower offering the flow of regeneration with the working oil of oil hydraulic motor, and then can dwindle the regeneration oil hydraulic motor.Therefore, as long as existing hydraulic pressure installation is done less improvement, just regeneration can be installed on existing hydraulic pressure installation with oil hydraulic motor.
And, be installed on existing hydraulic pressure installation if will regenerate with oil hydraulic motor, the working oil that should return to fuel tank can be offered the regeneration oil hydraulic motor, use hydraulic motor-driving generator by regeneration, obtain regenerated energy.
Description of drawings
Fig. 1 is the circuit diagram of mixing type hydraulic device with hydraulic energy reclaimer of the 1st mode of execution of the present invention.
Fig. 2 is the plotted curve that the relation between the flow of working oil of the pressure of working oil of described hydraulic energy reclaimer and hydraulic energy reclaimer is shown.
Fig. 3 is the circuit diagram of the mixing type hydraulic device of comparative example.
Fig. 4 is the explanatory drawing of emulation (simulation) of the mixing type hydraulic device of the 1st mode of execution of the present invention.
Fig. 5 is the plotted curve that described simulation result is shown.
Fig. 6 is the plotted curve that described simulation result is shown.
Fig. 7 is the plotted curve that described simulation result is shown.
Fig. 8 is the circuit diagram of variation of mixing type hydraulic device with hydraulic energy reclaimer of the 1st mode of execution of the present invention.
Fig. 9 is the circuit diagram of mixing type hydraulic device with hydraulic energy reclaimer of the 2nd mode of execution of the present invention.
Figure 10 is the plotted curve that the relation between the torque of the rotational speed of generator and generator is shown.
Figure 11 is the circuit diagram of variation of mixing type hydraulic device with hydraulic energy reclaimer of the 2nd mode of execution of the present invention.
Figure 12 is the circuit diagram of variation of mixing type hydraulic device of variation with hydraulic energy reclaimer of the 2nd mode of execution of the present invention.
Embodiment
Below, illustrate in greater detail hydraulic energy reclaimer of the present invention according to illustrated mode of execution.
[the 1st mode of execution]
Fig. 1 is the hydraulic energy reclaimer 7 by the rearmounted the present invention of installation the 1st mode of execution in existing hydraulic pressure installation, and a part of relief valve is changed to the circuit diagram of the mixing type hydraulic device that obtains after sequence valve.In existing relief valve, the pressure difference of first side, second side is carried out the switching of valve as setting pressure, yet due at second side afterpad pressure energy reclaimer 7, thereby become the setting pressure higher than the past.By being made as sequence valve, can and existing product is set as in the same manner and tank pressure between pressure difference, thereby can make entrance (meter-in)/outlet (meter-out) pressure identical with existing product, and reach the acceleration/deceleration torque identical with existing product.
Described mixing type hydraulic device has: rotation oil hydraulic motor 1, and it makes solid of rotation 8 rotations; The direction switch valve 2 of 6 port 3 positions, it switches the sense of rotation of solid of rotation 8; Oil hydraulic pump 3, it is oily with oil hydraulic motor 1 transportation work to rotation; Engine 4, it drives oil hydraulic pump 3.
Described oil hydraulic pump 3 is the oil hydraulic pumps such as gear pump, trochoid pump, vane pump, reciprocating pump, sucks working oil and ejection from fuel tank 5.
Described direction switch valve 2 is connected with oil hydraulic pump 3 by the 1st pipe arrangement 51, is connected with oil hydraulic motor 1 with rotation by the 2nd pipe arrangement 52 and the 3rd pipe arrangement 53.This direction switching valve 2 has the 1st and the 2nd pilot pressure receiving portion 2a, 2b, and the 1st pilot pressure receiving portion 2a is connected with pilot valve 6 by the 1st guide's pipe arrangement 61, and the 2nd pilot pressure receiving portion 2b is connected with pilot valve 6 by the 2nd guide piping 62.The the 1st and the 2nd pilot pressure receiving portion 2a, 2b accept pilot pressure, and the neutral position of the position of direction switch valve 2 from figure switches to dextrorotation position (position on the right side in figure) or left-handed position (position in the left side in figure) thus.And described pilot valve 6 is connected with not shown pioneer pump.
In described neutral position, the 1st port P1 and the 4th port P4 are interconnected, and the 2nd port P2, the 3rd port P3, the 5th port P5 and the 6th port P6 are in off state.At this moment,, flow through in the 4th, the 5th pipe arrangement 54,55 and return to fuel tank 5 by after the 1st, the 4th port P1, P4 by the working oil of oil hydraulic pump 3 ejection.
In described dextrorotation position, the 2nd port P2 and the 6th port P6 are interconnected, and the 3rd port P3 and the 5th port P5 are interconnected, and the 1st port P1 and the 4th port P4 are in off state.At this moment,, flow through in the 3rd pipe arrangement 53 and supply with rotation with oil hydraulic motor 1 by after the 2nd port P2, the 6th port P6 by the working oil of oil hydraulic pump 3 ejection.
In described left-handed position, the 2nd port P2 and the 5th port P5 are interconnected, and the 3rd port P3 and the 6th port P6 are interconnected, and the 1st port P1 and the 4th port P4 are in off state.At this moment,, flow through in the 2nd pipe arrangement 52 and supply with rotation use oil hydraulic motor 1 by after the 2nd port P2, the 5th port P5 by the working oil of described oil hydraulic pump 3 ejections.
Be provided with the 1st one-way valve 11 at described the 1st pipe arrangement 51.One end of the 6th pipe arrangement 56 is connected between the 1st one-way valve 11 and oil hydraulic pump 3.And, be provided with relief valve 21 at described the 6th pipe arrangement 56, be used for making the pressure of the working oil in the 1st pipe arrangement 51 to be 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 57, the 8th pipe 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, is used for making the pressure of the working oil in the 2nd, the 3rd pipe arrangement 52,53 to be no more than predetermined value (for example 28MPa).On the other hand, in described the 8th pipe arrangement 58, the 2nd, the 3rd one- way valve 12,13 is set, is used for making in the 2nd, the 3rd pipe arrangement 52,53 can not becoming 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 the ejiction opening that will spray from the working oil 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 the outflow opening that will spray from the working oil 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, has to be transformed to the hydraulic energy reclaimer 7 of electric energy with the motion of the working oil of oil hydraulic motor 1 outflow from rotation.This hydraulic energy reclaimer 7 has regeneration relief valve 101, regeneration oil hydraulic motor 102, generator 103, inverter 104, electric accumulator 105, pressure transducer 106, control gear 107.In addition, regeneration is examples of relief valve of the present invention with relief valve 101.
The end that described regeneration is located at the 9th pipe arrangement 59, the 9 pipe arrangements 59 with relief valve 101 is connected between the 1st sequence valve 22 and the 2nd sequence valve 23.Thus, described regeneration is connected by the 9th pipe arrangement 59 and the 7th pipe arrangement 57 and the 1st, the 2nd sequence valve 22,23 ejiction opening with the inflow entrance of relief valve 101.This regeneration is set to lower than the 1st, the 2nd sequence valve 22,23 pressure set points with the pressure set points of relief valve 101.For example, if described the 1st, the 2nd sequence valve 22,23 pressure set points are set as 28MPa, the pressure set points that will regenerate with relief valve 101 is set as 21MPa.
The supply of working oil is accepted in described regeneration with oil hydraulic motor 102, drive generator 103.This regeneration is located at regeneration pipe arrangement 108 with oil hydraulic motor 102, and is connected in parallel with relief valve 101 with regeneration.That is, described regeneration is connected to the 1st, the 2nd sequence valve 22,23 ejiction opening and regeneration with between the inflow entrance of relief valve 101 with oil hydraulic motor 102.
Described inverter 104 is connected with generator 103, and controls the frequency of the electric current that offers generator 103.By changing this frequency, can control rotating speed or the torque of generator 103, and adjust the generated energy of generator 103.
Described electric accumulator 105 is connected with generator 103 by inverter 104, and accumulates the electric power by generator 103 generatings.This electric power is used by not shown electric device, can access energy-saving effect.
Described pressure transducer 106 detects the pressure of the working oil between the 1st, the 2nd sequence valves 22,23 ejiction opening and the regeneration use inflow entrance of relief valve 101.And described pressure transducer 106 will represent that the pressure signal of the pressure of detected working oil sends to control gear 107.
Described control gear 107 is controlled rotating speed or the torque of generator 103 by inverter 104.More particularly, described control gear 107 transmits control signal to inverter 104 according to the pressure signal from pressure transducer 106.
And, in described hydraulic energy reclaimer 7, can make from the working oil of a plurality of actuators with more lean on the working oil of upstream side to converge than regeneration with oil hydraulic motor 102.That is, although diagram not, in described the 9th pipe arrangement 59 with regeneration with the position that an end of pipe arrangement 108 is connected, be provided with can connecting pipings connection mouth, this pipe arrangement is for making working oil be back to fuel tank 5 from a plurality of actuators.
Fig. 2 is the plotted curve that the relation between the flow of working oil of the pressure of working oil of described hydraulic energy reclaimer 7 and hydraulic energy reclaimer 7 is shown.
The rotating speed of the generator 103 that is undertaken by described control gear 107 or the control of torque are to carry out in the mode that can access solid line, single-point line and dotted line in plotted curve.
Described solid line represents that the 1st, the 2nd sequence valve 22,23 ejiction opening and regeneration are with the relation between the flow of the pressure of the working oil between the inflow entrance of relief valve 101 and the working oil that passes through in regenerating with relief valve 101.
The ejiction opening of described single-point line expression the 2nd sequence valve 23 and regeneration are with the relation between the flow of the pressure of the working oil between the inflow entrance of relief valve 101 and the working oil that passes through in regenerating with oil hydraulic motor 102.
Described dotted line represents the ejiction opening of the 2nd sequence valve 23 and regenerates with the pressure of the working oil between the inflow entrance of relief valve 101 and the relation between the total flow.Wherein, described total flow be equivalent to the flow of the working oil that regeneration is passed through in relief valve 101 with regenerating with oil hydraulic motor 102 in the total flow of flow of the working oil that passes through.
In the mixing type hydraulic device of said structure, be connected in parallel with oil hydraulic motor 102 with relief valve 101 and regeneration owing to regenerating, thereby can be than small flow with offering that the flow of regeneration with the working oil of oil hydraulic motor 102 suppress.Therefore, can dwindle described regeneration oil hydraulic motor 102.
And, owing to can dwindle described regeneration with oil hydraulic motor 102, thereby do not need modification such as direction switch valve 2 and pilot valve 6, hydraulic energy reclaimer 7 can be placed on hydraulic pressure installation.
And, because the working oil that should return to described fuel tank 5 offers regeneration oil hydraulic motor 102, thereby can use oil hydraulic motor 102 driving generators 103 to obtain regenerated energy by regeneration.
And, owing to can dwindle described regeneration with oil hydraulic motor 102, thus if the design of changing a little existing hydraulic pressure installation, just can design can be with the hydraulic pressure installation of hydraulic energy reclaimer 7 postposition.
And, if less change is only done in the design of existing hydraulic pressure installation, do not need to arrange new manufacturing mechanism.
And, even when carrying out described hydraulic energy reclaimer 7 rearmounted, only use oil hydraulic motor 1 to make solid of rotation 8 rotations by rotation, thereby the operation sense of solid of rotation 8 is before identical with afterpad pressure energy reclaimer 7.
And, in postposition in the hydraulic pressure installation of described hydraulic energy reclaimer 7, even when the charge capacity of electric accumulator 105 is 0%, also can only utilize hydraulic pressure to make solid of rotation 8 rotation.
And, in postposition in the hydraulic pressure installation of described hydraulic energy reclaimer 7, irrelevant with the charge capacity of electric accumulator 105, can only utilize hydraulic pressure that the rotational speed of solid of rotation 8 is slowed down.
And, in postposition in the hydraulic pressure installation of described hydraulic energy reclaimer 7, if the charge capacity of electric accumulator near 100%, can stop regeneration.Therefore, the charging and discharging that can simplify described electric accumulator 105 is controlled.
And, even when described regeneration is broken down with oil hydraulic motor 102 and generator 103, also can adopt with the front identical using method of afterpad pressure energy reclaimer 7 to operate.
And; if when problem occurs described hydraulic energy reclaimer 7, allow to by handover operation, regeneration function be disconnected, guarantee working performance; can shorten hydraulic energy reclaimer 7 operational test during, the device of protection hydraulic energy reclaimer 7 is become simple.
And, because described control gear 107 is controlled the rotating speed of generator 103 by inverter 104, thereby can prevent that the rotational speed of generator 103 is excessive.
And if the rotational speed of described generator 103 is excessive, the voltage of regeneration increases, and will cause equipment damage.And, because the heating of described generator 103 increases, needs are taked the countermeasure of generating heat, cause the rising of manufacture cost.
Therefore, prevent the excessive rising that can suppress manufacture cost of rotational speed of described generator 103.
And described control gear 107 bases are controlled rotating speed or the torque of generator 103 by the pressure of pressure transducer 106 detected working oils, thereby can control accurately the generated energy of generator 103.
And because described control gear 107 bases are controlled rotating speed or the torque of generator 103 by the pressure of pressure transducer 106 detected working oils, 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 component part mark identical with component part shown in Figure 1 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: electric motor 9, its auxiliary rotation oil hydraulic motor 1; The 10th pipe arrangement 60, it will be directed to fuel tank 5 from the working oil of the 2nd, the 3rd relief valve 122,123 ejections.Regeneration is not set with relief valve 101 at the 10th pipe arrangement 60, does not connect the end that pipe arrangement 108 is used in regeneration yet.
In described mixing type hydraulic device, need to make rotation with the aggregate value of the torque of oil hydraulic motor 1 and the torque of electric motor 9, same with the torque phase of oil hydraulic motor 1 with the rotation of existing hydraulic pressure installation (non-mixed hydraulic pressure installation).Therefore, need to be with inlet pressure and outlet pressure reduction with the auxiliary materials of the electric motor suitable amount of rotation with oil hydraulic motor 1.
Therefore, in the situation that transform existing hydraulic pressure installation as the 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 whole opening area of throttle valve to open side, thus should transformation more difficult.
And, in the situation that with the torque of described electric motor 9 be made as in the past based on 1/3 of the deceleration torque that discharges, electric motor 9 mechanically directly is connected with solid of rotation 8, and the speed of the rotating speed of electric motor 9 and solid of rotation 8 is proportional, 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 can Set arbitrarily with the rotational speed of oil hydraulic motor 102, does not rely on the speed of solid of rotation 8, thereby reaches 5/9 of rotating energy.
Therefore, the theoretical regenerated energy of the mixing type hydraulic device of present embodiment is approximately 2 times of theoretical regenerated energy of the mixing type hydraulic device of comparative example.
Fig. 4 is the explanatory drawing of emulation of the mixing type hydraulic device of present embodiment.
In above-mentioned emulation, be set as rotation and use oil hydraulic motor 1 with 1500min
-1, speed control muffler full cut-off approximately 0.2 second, the state that slows down and stop by release, the time of calculating pressure P1, P2 changes and the time of the flow Q1～Q5 of working oil changes.And, in above-mentioned emulation, with oil hydraulic motor 1, be set as initial velocity 1500min for rotation
-1, volume 150cc/rev, motor drive shaft conversion inertia 8.45kgm
2, the 1st and the 2nd sequence valve 22 and 23 pressure set points 28MPa, regeneration is with the pressure set points 16MPa of relief valve 101.
The time of above-mentioned pressure P 1, P2 changes as shown in the plotted curve of Fig. 5.In regeneration with under the effect of relief valve 101, above-mentioned pressure P 2 approximately 0.2 second～approximately 1.6 seconds during in keep approximately 16MPa.And, above-mentioned pressure P 2 approximately 1.6 seconds～approximately 2.2 seconds during in only controlled by generator 103.
The time of the flow Q1～Q3 of above-mentioned working oil changes as shown in the plotted curve of Fig. 6.This flow Q2 is rate of discharge, the position by direction switch valve 2 from the dextrorotation position or left-handed position return to the neutral position, this flow Q2 is approximately reaching 0 during 0.2 second, approximately after 0.2 second, all flows towards hydraulic energy reclaimer 7 with flow Q1.In addition, exaggerate showing 0.0 second in the plotted curve of Fig. 6～approximately the flow Q1 during 0.1 second and flow Q2's is poor, also exaggerate showing 0.2 second～approximately the flow Q1 during 2.1 seconds and flow Q3's is poor.
The time of the flow Q3～Q5 of above-mentioned working oil changes as shown in the plotted curve of Fig. 7.There are not flow regular time in this flow Q3, Q4, but approximately 0.2 second～approximately during 1.6 seconds, the rotational speed that flow Q5 regenerates with oil hydraulic motor 102 by control reaches firm discharge, thereby the generated energy that can be fixed in generator 103.And approximately after 1.6 seconds, flow Q5 and flow Q3 descend in the same manner.
Like this, described flow Q5 is suppressed to than low discharge, thereby can to make regeneration be small capacity with the capacity of oil hydraulic motor 102, can dwindle regeneration use relief valve 101.
In above-mentioned the 1st mode of execution, even there is no inverter 104 and control gear 107, also can access regenerated energy.
In above-mentioned the 1st mode of execution, with the position that an end of pipe arrangement 108 is connected, connection mouth is set with regeneration in the 9th pipe arrangement 59, yet also can be as shown in Figure 8, this connection mouth by cylinder pipe arrangement 71 connection a plurality of oil hydraulic cylinder 81A, 81B ...Like this, can obtain efficiently regenerated energy.In addition, a plurality of oil hydraulic cylinder 81A, 81B ... it is an example of actuator of the present invention.And, the 82A in Fig. 8,82B ... the order of representation valve.
[the 2nd mode of execution]
Fig. 9 is the circuit diagram of the mixing type hydraulic device that obtains after hydraulic energy reclaimer 207 by rearmounted the 2nd mode of execution of the present invention in existing hydraulic pressure installation.And, in Fig. 9, for the component part mark identical with component part shown in Figure 1 identical with component part in Fig. 1 with reference to label, and description thereof is omitted.
Described hydraulic energy reclaimer 207 has: rotation speed sensor 306, and it detects the rotational speed of generator 103; Control gear 307, it controls rotating speed or the torque of generator 103 according to the rotational speed by the detected generator 103 of this rotation speed sensor 306.In addition, rotation speed sensor 306 is examples of detection device.
Figure 10 is the plotted curve that the relation between the torque of the rotational speed of described generator 103 and generator 103 is shown.
The rotating speed of 307 pairs of generators 103 of described control gear or the control of torque are to carry out in the mode that can access the solid line in plotted curve.More particularly, when the rotational speed of generator 103 reaches R1 from 0, adjust the torque of generator 103, make the torque of generator 103 roughly fixing.And, when the rotational speed of generator 103 reaches R2, the torque of generator 103 is sharply increased, suppress the increase of the rotational speed of generator 103.
And when the rotational speed of described generator 103 reached R2, the torque of generator 103 was T2, but this T2 is corresponding to the pressure set points of regeneration with relief valve 101.Therefore, when the torque that makes generator 103 sharply increased, regeneration was opened with relief valve 101.
According to the mixing type hydraulic device of said structure, control gear 307 is controlled the rotating speed of generator 103 by inverter 104, can prevent that thus the rotational speed of generator 103 is excessive.
If the rotational speed of described generator 103 is excessive, will cause the heating of generator 103 to increase, thereby need to take the countermeasure of generating heat, cause the rising of manufacture cost.
Therefore, prevent the excessive rising that can suppress manufacture cost of rotational speed of described generator 103.
And described control gear 307 is controlled rotating speed or the torque of generator 103 according to the rotational speed by the detected generator 103 of rotation speed sensor 306, thereby can control accurately the generated energy of generator 103.
And because described control gear 307 bases are controlled rotating speed or the torque of generator 103 by the rotational speed of the detected generator 103 of rotation speed sensor 306, 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 above-mentioned the 1st mode of execution is relatively good.
In above-mentioned the 2nd mode of execution, even there is no inverter 104 and control gear 307, also can access regenerated energy.
In above-mentioned the 2nd mode of execution, with the position that an end of pipe arrangement 108 is connected, connection mouth is set with regeneration in the 9th pipe arrangement 59, yet also can be as shown in figure 11, this connection mouth by cylinder pipe arrangement 71 connection a plurality of oil hydraulic cylinder 81A, 81B ...Like this, can obtain efficiently regenerated energy.In addition, a plurality of oil hydraulic cylinder 81A, 81B ... it is an example of actuator of the present invention.And, the 82A in Figure 11,82B ... the order of representation valve.
In above-mentioned the 2nd mode of execution, hydraulic energy reclaimer 207 is placed in the mixing type hydraulic device, but also can as shown in figure 12, hydraulic energy reclaimer 407 be placed in the mixing type hydraulic device.This hydraulic energy reclaimer 407 has as the flow transducer 506 of an example of detection device and control gear 507.Described flow transducer 506 detects the flow of the working oil that passes through in regenerating with oil hydraulic motor 102.And described control gear 507 is controlled rotating speed or the torque of generator 103 according to the flow by flow transducer 506 detected working oils.According to this hydraulic energy reclaimer 407, also can access the action effect identical with hydraulic energy reclaimer 207.
And, also can use the cylinder such pipe arrangement of pipe arrangement 71 as shown in figure 11 in mixing type hydraulic device shown in Figure 12.That is, in described mixing type hydraulic device, also can arrange the working oil from a plurality of actuators is directed to than regeneration and more lean on the pipe arrangement of upstream side with oil 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 mode of execution, can carry out within the scope of the invention various changes and implement.For example, also can be with the above-mentioned the 1st and the 2nd mode of execution and distortion thereof are carried out the mode that appropriate combination obtains, as an embodiment of the invention.
Label declaration
1 rotation oil hydraulic motor; 2 direction switch valves; 3 oil hydraulic pumps; 4 engines; 5 fuel tanks; 6 pilot valves; 7,207,407 hydraulic energy reclaimers; 8 solid of rotation; 9 electric motors; 81A, 81B cylinder; 101 regeneration relief valves; 102 regeneration oil hydraulic motors; 103 generators; 104 inverters; 105 electric accumulators; 106 pressure transducers; 107,307,507 control gear; 306 rotation speed sensors; 506 flow transducers.
Claims (7)
1. a hydraulic energy reclaimer (7,207,407), is characterized in that, this hydraulic energy reclaimer (7,207,407) has:
Regeneration oil hydraulic motor (102), it is supplied to the working oil that return to fuel tank;
Relief valve (101), itself and described regeneration are connected in parallel with oil hydraulic motor (102); And
Generator (103), it is driven with oil hydraulic motor (102) by described regeneration.
2. hydraulic energy reclaimer according to claim 1 (7,207,407), is characterized in that, described hydraulic energy reclaimer (7,207) has:
Inverter (104), it is connected with described generator (103); And
Control gear (107,307), it controls rotating speed or the torque of described generator (103) by described inverter (104).
3. hydraulic energy reclaimer according to claim 2 (7), is characterized in that,
Described hydraulic energy reclaimer (7) has pressure transducer (106), and this pressure transducer (106) detects than described regeneration and more leans on the pressure of the working oil of upstream side with oil hydraulic motor (102),
Described control gear (107) is controlled rotating speed or the torque of described generator (103) according to the pressure by the detected working oil of described pressure transducer (106).
4. according to claim 2 or 3 described hydraulic energy reclaimers (207), is characterized in that,
Described hydraulic energy reclaimer (207,407) has detection device (306,506), and this detection device (306,506) detects the flow of the working oil that passes through in oil hydraulic motor (102) in described regeneration,
Described control gear (307,407) is controlled rotating speed or the torque of described generator (103) according to by the detected value of described detection device (306,506).
5. hydraulic energy reclaimer according to claim 4 (207), is characterized in that,
Described detection device (306) is the rotation speed sensor (306) that detects the rotational speed of described generator (103),
Rotational speed by the detected described generator of described rotation speed sensor (306) (103) by the detected value of described detection device (306).
6. hydraulic energy reclaimer according to claim 4 (407), is characterized in that,
Described detection device (506) is the flow transducer (506) that detects the flow of the working oil that passes through in oil hydraulic motor (102) in described regeneration,
Flow by the detected working oil of described flow transducer (506) by the detected value of described detection device (506).
7. the described hydraulic energy reclaimer of any one (7,207,407) according to claim 1～3, it is characterized in that, from the working oil of a plurality of actuators (81A, 81B) can with more converge by the working oil of upstream side with oil hydraulic motor (102) than described regeneration.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010-209586 | 2010-09-17 | ||
| JP2010209586 | 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 true CN103097746A (en) | 2013-05-08 |
| CN103097746B CN103097746B (en) | 2016-05-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201180043702.2A Expired - Fee Related 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) |
Cited By (4)
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| CN103697023A (en) * | 2013-12-26 | 2014-04-02 | 浙江德泰机电工程有限公司 | Electro-hydraulic energy recovery and release system for slewing brake of engineering machinery |
| CN104179756A (en) * | 2013-05-20 | 2014-12-03 | 住友重机械工业株式会社 | Regeneration circuit for hydraulic motor, construction machine including regeneration circuit, and method of controlling regeneration circuit of hydraulic motor |
| CN104454795A (en) * | 2013-09-18 | 2015-03-25 | 大金工业株式会社 | Building machinery |
| CN112936972A (en) * | 2021-02-08 | 2021-06-11 | 吕言 | Hydraulic control device and control method for hydraulic machine |
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|---|---|---|---|---|
| JP2014013045A (en) * | 2012-07-03 | 2014-01-23 | Daikin Ind Ltd | Hydraulic recovery apparatus |
| JP6019828B2 (en) * | 2012-07-03 | 2016-11-02 | ダイキン工業株式会社 | Hydraulic regeneration device |
| 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 |
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| 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 |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02163300A (en) * | 1988-12-16 | 1990-06-22 | Toyota Autom Loom Works Ltd | Hydraulic device in battery type industrial vehicle |
| JP2005140143A (en) * | 2003-11-04 | 2005-06-02 | Komatsu Ltd | Energy recovering device for pressure oil |
| JP2008202343A (en) * | 2007-02-21 | 2008-09-04 | Hitachi Constr Mach Co Ltd | Hydraulic drive unit of construction machine |
| CN201116558Y (en) * | 2007-08-27 | 2008-09-17 | 浙江工业大学 | Prime mover output torque balance control device |
| US20080317574A1 (en) * | 2005-08-24 | 2008-12-25 | Shin Caterpillar Mitsubishi Ltd. | Swing Drive Device and Work Machine |
| WO2010038562A1 (en) * | 2008-09-30 | 2010-04-08 | ダイキン工業株式会社 | Rotation drive device |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63106405A (en) * | 1986-10-22 | 1988-05-11 | Komatsu Ltd | Controlling method for hydraulic device for driving inertial body |
| JP5028729B2 (en) * | 2001-09-05 | 2012-09-19 | コベルコ建機株式会社 | Control method of boom cylinder circuit of hydraulic excavator |
| JP2004176893A (en) * | 2002-11-29 | 2004-06-24 | Komatsu Ltd | Hydraulic circuit for differential cylinder, and hydraulic power unit apparatus |
-
2011
- 2011-08-09 JP JP2011174116A patent/JP5035463B2/en not_active Expired - Fee Related
- 2011-08-29 WO PCT/JP2011/069391 patent/WO2012035964A1/en active Application Filing
- 2011-08-29 CN CN201180043702.2A patent/CN103097746B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02163300A (en) * | 1988-12-16 | 1990-06-22 | Toyota Autom Loom Works Ltd | Hydraulic device in battery type industrial vehicle |
| JP2005140143A (en) * | 2003-11-04 | 2005-06-02 | Komatsu Ltd | Energy recovering device for pressure oil |
| US20080317574A1 (en) * | 2005-08-24 | 2008-12-25 | Shin Caterpillar Mitsubishi Ltd. | Swing Drive Device and Work Machine |
| JP2008202343A (en) * | 2007-02-21 | 2008-09-04 | Hitachi Constr Mach Co Ltd | Hydraulic drive unit of construction machine |
| CN201116558Y (en) * | 2007-08-27 | 2008-09-17 | 浙江工业大学 | Prime mover output torque balance control device |
| WO2010038562A1 (en) * | 2008-09-30 | 2010-04-08 | ダイキン工業株式会社 | Rotation drive device |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104179756A (en) * | 2013-05-20 | 2014-12-03 | 住友重机械工业株式会社 | Regeneration circuit for hydraulic motor, construction machine including regeneration circuit, and method of controlling regeneration circuit of hydraulic motor |
| CN104454795A (en) * | 2013-09-18 | 2015-03-25 | 大金工业株式会社 | Building machinery |
| CN103697023A (en) * | 2013-12-26 | 2014-04-02 | 浙江德泰机电工程有限公司 | Electro-hydraulic energy recovery and release system for slewing brake of engineering machinery |
| 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 |
| CN112936972A (en) * | 2021-02-08 | 2021-06-11 | 吕言 | Hydraulic control device and control method for hydraulic machine |
Also Published As
| Publication number | Publication date |
|---|---|
| JP5035463B2 (en) | 2012-09-26 |
| WO2012035964A1 (en) | 2012-03-22 |
| CN103097746B (en) | 2016-05-18 |
| JP2012082953A (en) | 2012-04-26 |
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