WO2013174235A1 - Système de recyclage d'énergie pour engin de travaux - Google Patents

Système de recyclage d'énergie pour engin de travaux Download PDF

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Publication number
WO2013174235A1
WO2013174235A1 PCT/CN2013/075812 CN2013075812W WO2013174235A1 WO 2013174235 A1 WO2013174235 A1 WO 2013174235A1 CN 2013075812 W CN2013075812 W CN 2013075812W WO 2013174235 A1 WO2013174235 A1 WO 2013174235A1
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WIPO (PCT)
Prior art keywords
port
valve
control
main
pressure
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PCT/CN2013/075812
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English (en)
Chinese (zh)
Inventor
何清华
唐中勇
张大庆
张云龙
王金钢
陈涵
Original Assignee
山河智能装备股份有限公司
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Application filed by 山河智能装备股份有限公司 filed Critical 山河智能装备股份有限公司
Priority to EP13794438.5A priority Critical patent/EP2853755B1/fr
Priority to AU2013265872A priority patent/AU2013265872B2/en
Priority to SG11201407604WA priority patent/SG11201407604WA/en
Publication of WO2013174235A1 publication Critical patent/WO2013174235A1/fr

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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
    • 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
    • E02F9/2278—Hydraulic circuits
    • E02F9/2285—Pilot-operated systems
    • 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
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/21—Systems with pressure sources other than pumps, e.g. with a pyrotechnical charge
    • F15B2211/212—Systems with pressure sources other than pumps, e.g. with a pyrotechnical charge the pressure sources being accumulators
    • 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
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/30505—Non-return valves, i.e. check valves
    • F15B2211/3051—Cross-check valves
    • 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
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/30505—Non-return valves, i.e. check valves
    • F15B2211/30515—Load holding valves
    • 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
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/3056—Assemblies of multiple valves
    • F15B2211/3059—Assemblies of multiple valves having multiple valves for multiple output members
    • 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
    • F15B2211/30—Directional control
    • F15B2211/32—Directional control characterised by the type of actuation
    • F15B2211/329—Directional control characterised by the type of actuation actuated by fluid pressure
    • 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
    • F15B2211/30—Directional control
    • F15B2211/355—Pilot pressure control
    • 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
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/705—Output members, e.g. hydraulic motors or cylinders or control therefor characterised by the type of output members or actuators
    • F15B2211/7051—Linear output members
    • F15B2211/7053—Double-acting output members
    • 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
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/71—Multiple output members, e.g. multiple hydraulic motors or cylinders
    • F15B2211/7114—Multiple output members, e.g. multiple hydraulic motors or cylinders with direct connection between the chambers of different actuators
    • F15B2211/7128—Multiple output members, e.g. multiple hydraulic motors or cylinders with direct connection between the chambers of different actuators the chambers being connected in parallel
    • 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
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/76—Control of force or torque of the output member
    • F15B2211/761—Control of a negative load, i.e. of a load generating hydraulic energy
    • 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

Definitions

  • the invention relates to a hydraulic system for controlling the flow of liquid of an energy converter, which can move mechanical components on the machine, in particular to recover energy from the energy converter and then use the recovered energy to provide a certain job Powered device.
  • the hydraulic cylinder includes a cylinder having a piston that divides two chambers in the cylinder, a rod connected to the piston is coupled to the boom, and the cylinder is coupled to the main body of the excavator by extending the rod outward from the cylinder and Retracting the rod toward the cylinder to raise and lower the bracket; when the excavator is working, the position of the working device such as the cantilever, the stick, the bucket and the corresponding cylinder is constantly adjusted, especially the cantilever is often at a certain low position.
  • the bracket can be It only decreases under the action of gravity, and if it does not provide the resistance to fall, it is prone to weight loss during the descent.
  • the conventional solution is to maintain the hydraulic cylinder with a certain back pressure.
  • a throttle device is often provided on the liquid flow return pipe, and the hydraulic oil flows back through the throttle device.
  • the fuel tank such that the potential energy of the cantilever is converted into heat energy, is wasted in vain.
  • a heat sink is also required. Therefore, there is a need to find an effective technique for energy recovery and reuse in hydraulic systems.
  • the technical problem to be solved by the present invention is to provide a working device energy recovery system that saves energy and reduces the temperature rise of the hydraulic system hydraulic oil.
  • the working device potential energy recovery hydraulic system used in the present invention comprises two sets of energy converters, a main valve, a first control signal (Signal-a) and a second control signal (Signal-b) including at least a unit respectively.
  • the inlet of the pressure energy holding valve is connected to the main valve through a switching valve, and the outlet of the pressure energy holding valve is connected to the rodless cavity of the energy converter unit, and the switching valve is connected with energy collection.
  • the input of the logic control unit is communicatively coupled to the main valve, the energy converter unit, the first control signal (Signal-a) and the second control signal (Signal-b), and the output of the logic control unit The end is connected to the control end of the switching valve.
  • the two sets of energy converter units (1.1) (1.2) are respectively separated into corresponding (1.1b) (1.1c) and (1.2b) (1.2c) by the rod piston (1.1a) (1.2a).
  • a chamber, the (1.1b), (1.2b) working chambers are respectively provided with oil ports (B1), (B2) and directly connected to the main valve port (B), the (1.1c), ( 1.2c)
  • the working chambers are respectively provided with oil ports (A1) and (A2).
  • the boom device (BOOM) acts on the energy converter units (1.1), (1.2).
  • the pressure energy maintaining valve 2 includes: unit valves (2a) and (2b), a signal or valve (2c), a pressure overload protection valve (2d), a directional valve (2e), and a one-way throttle valve (2f).
  • the unit valve (2a) is provided with a first oil port Ia, a second oil port IIa, a third oil port IIIa, and a fourth oil port IVa, and the second oil port IIa and the fourth oil port IVa communicate with each other; (2b)
  • the fifth port Ib, the sixth port IIb, the seventh port IIIb, and the eighth port IVb are provided, and the sixth port IIb and the eighth port IVb are inter-connected, and the pressure port is fixed.
  • (IIa) and (IIb) are respectively connected to the first working chamber port (A1) and the second working chamber port (A2) of the energy converters (1.1c) and (1.2c).
  • the directional valve is provided with a first pressure input port k1, a second pressure input port k2, a return port (kt) and a reversing control port (Kb5), a first pressure input port k1 and a third port of the port IIIa, the seventh port IIIb are interconnected, the oil return port (kt) is connected to the oil return path (T2) and is returned to the oil tank, and the reversing control port (Kb5) is connected to the second connection of the second control signal Signal-b. Point (S2).
  • the signal or valve includes: a third pressure input port a and a fourth pressure input port b, and a pressure output port (c).
  • the third pressure input port a is connected to the fourth port IVa of the unit valve (2a).
  • the four pressure input port b is connected to the eighth valve port IVb of the unit valve (2b), the pressure output port (c) is connected to the second pressure input port k2 of the directional valve and logically or thirdly takes the third pressure input port a Or the high pressure oil signal of the fourth pressure input port b.
  • the pressure overload protection valve inlet is connected to the oil passage (G) of the second pressure input port k2 to the pressure output port c, and the output port is connected to the control oil passage (H) of the reversing control port (Kb5).
  • the one-way control valve (2f) has a resistance to open the pressure overload protection valve output oil passage, and the pressing force acts on the reversing control port (Kb5), so that the directional valve (2e) is reversed for overload protection. , has no control effect on the second control signal (Signal-b).
  • the switching valve includes: a first main port P1, a second main port P2, a third main port (A), a fourth main port (B), a first control port Ka4, and a second control port Kb4.
  • the first main port P1 and the second main port P2 are respectively connected to the main valve port (A) and the energy collector port (X), and the third main port (A) and the fourth main port (B)
  • the first control port Ka4 and the second control port Kb4 are respectively associated with the third control port (Pp1) and the fourth control port of the logic control component.
  • the control port (Pp2) is connected.
  • the port (A) is connected to the second main port P2; when the second control port Kb4 has a signal, the switching valve is switched to the right position, at this time, the first main port P1 and the third main port (A)
  • the fourth main port (B) is connected to the second main port P2; when neither the first control port Ka4 nor the second control port Kb4 acts as a signal, the switching valve is in the normal position (median position), When the first main port P1 and the first Main port (A), the fourth main port (B) through the second main port P2 nowhere.
  • the logic control component may be a hydraulic logic control component, an electrical logic control component, or an electro-hydraulic logic control component, and the input/output connection thereof includes: inputting (Ka2) a first connection point connected to the first control signal Signal-a (S1), the input (Ka3) is connected to the main valve port (A) to the first main oil passage (E) of the first main port P1, and the input (Kb2) is connected to the second control signal At the third connection point (S3) of Signal-b, the input (Kb3) is connected to the main valve port (B) to the first rod end port (B1) of the energy converter, and the second rod end oil
  • the second main oil passage (F) of the port (B2); the third control port (Pp1) is connected to the first control port Ka4, and the fourth control port (Pp2) is connected to the second control port Kb4.
  • the energy converter units (1.1), (1.2) synchronously lift the boom device (BOOM) by means of a rod piston (1.1a), (1.2a), at which time the input hydraulic energy is converted into a boom device (BOOM) Potential energy;
  • the boom device (BOOM) drives the rod pistons (1.1a) and (1.2a) of the energy converter units (1.1) and (1.2) to descend synchronously, and the potential energy of the boom device (BOOM) is converted into hydraulic pressure.
  • the pressure energy retaining valve can prevent not only leakage of pressure oil in the working chambers (1.1c) and (1.2c) of the energy converter, but also keeps the boom device (BOOM) in place, and prevents energy conversion when not in operation.
  • the pressure oil pressure in the two working chambers (1.1c) and (1.2c) is too high.
  • the working oil can be unidirectionally introduced into the second port IIa and the sixth port IIb from the ports (Ia) and (Ib), respectively.
  • the second control signal Signal- b acts as a reversing control port (Kb5), the directional valve is reversed, and the pressure oil from the two working chambers (1.1c) and (1.2c) of the energy converter is from the second port IIa and the sixth port IIb passes into the first port Ia and the fifth port Ib, respectively.
  • the switching valve is in the middle position, and the boom device (BOOM) can be lifted and lowered to perform normal operation;
  • the control port Ka4 has a signal and the switching valve is in the left position, it is connected to the main valve port (A), the first main port P1 and the fourth main port (B), and the pressure energy is maintained.
  • the loops of the fifth port Ib and the sixth port IIb of the valve and the port (1.2) of the energy converter unit (1.2) form a passage, and are connected to the energy collector port (X) and the second main oil at the same time.
  • the circuit of the port P2 and the third main port (A), the first oil port Ia and the second port IIa of the pressure energy retaining valve, and the oil port (A1) of the energy converter unit (1.1) also form a passage; Connecting to the main valve port (A), the first main port P1 of the switching valve, and the third main oil when the second control port Kb4 has a signal action and the switching valve is in the right position.
  • the circuit of (A1) forms a passage, and is connected to the energy collector port (X), the second main port P2 and the fourth main port (B) of the switching valve, and the fifth oil of the pressure maintaining valve
  • the loops of the port Ib and the sixth port IIb, the second working chamber port (A2) of the energy converter unit (1.2) form a passage.
  • the logic control component can perform signal control on the first control port Ka4 and the second control port Kb4 of the switching valve according to the pressure of the first main oil passage (E) or the second main oil passage (F), respectively.
  • the first control signal Signal-a and the second control signal Signal- directly or indirectly
  • the control numbers of b are respectively introduced into the first control port Ka4 and the second control port Kb4 of the switching valve. Otherwise, the first control port Ka4 and the second control port Kb4 of the switching valve have no signal.
  • the first control signal Signal-a and the second control signal Signal-b are hydraulic pressure signals and/or electrical signals, which are directly or indirectly taken from the operating handle.
  • the invention has the beneficial effects that the invention is applicable to the recovery and utilization of the potential energy of the excavator type boom, and the potential energy of the boom is charged into the energy collector through the corresponding control when the boom is lowered, and the energy consumption of the arm when the excavator is performing During the operation, the stored oil is released directly by controlling the switching valve to reduce the input power of the prime mover.
  • the invention has the advantages of simple principle, convenient control and reliable performance, and can automatically realize the hot oil exchange cooling in the energy collector, which can not only reduce the heating of the hydraulic system, save energy, but also reduce the emissions of the prime mover.
  • Embodiment 1 is a schematic view showing the structure of Embodiment 1.
  • a working device potential energy recovery hydraulic system includes two sets of energy converters including at least (1.1, 1.2) units, a main valve 6, a first control signal Signal-a, and a second control signal Signal-b.
  • the inlet of the pressure energy holding valve 2 is connected to the main valve 6 via a switching valve 3, and the outlet of the pressure energy holding valve 2 is connected to the rodless chamber of the energy converter unit (1.1, 1.2).
  • the switching valve 3 is connected to the energy harvester 4, the input of the logic control unit 5 and the main valve 6, the energy converter unit (1.1, 1.2), the first control signal Signal-a and the second control signal Signal
  • the -b communication connection, the output of the logic control unit 5 is connected to the control terminal of the switching valve 3.
  • the energy converter units (1.1, 1.2) are respectively separated into corresponding working chambers (1.1b, 1.1c, 1.2b, 1.2c) by rod pistons (1.1a, 1.2a), said working chambers (1.1b, 1.2b)
  • the working chambers are respectively provided with oil ports (B1, B2) and directly connected to the main valve port (B), and the working chambers (1.1c, 1.2c) are respectively provided with oil ports (A1) A2)
  • the pressure energy holding valve 2 includes: a unit valve (2a, 2b), a signal or valve (2c), a pressure overload protection valve 2d, a directional valve 2e, a one-way control valve 2f, the unit
  • the valve 2a is provided with a first oil port Ia, a second oil port IIa, a third oil port IIIa, and a fourth oil port IVa, and the second oil port IIa communicates with the fourth oil port IVa;
  • the unit valve 2b is provided with a The five port Ib, the sixth port IIb, the seventh port
  • the input port k1 is interconnected with the third port IIIa and the seventh port IIIb, the oil return port kt is connected to the oil return path T2 and is returned to the oil tank, and the reversing control port Kb5 is connected to the
  • the main valve is input to the second connection point S2 of the second control signal Signal-b;
  • the signal or valve 2c includes: a third pressure input port a and a fourth pressure input port b, a pressure output port c, and a third pressure
  • the input port a is connected to the fourth port IVa of the unit valve 2a, the fourth pressure input port b is connected to the eighth port IVb of the unit valve 2b, and the pressure output port c is connected to the directional valve port k2.
  • the high pressure oil signal of the third pressure input port a or the fourth pressure input port b is logically taken, and the inlet of the pressure overload protection valve 2d is connected to the oil path G of the oil port k2 to the pressure output port c, and the output port is connected.
  • the control oil passage H of the reversing control port Kb5; the one-way throttle valve 2f has a resistance to the output oil passage of the pressure overload protection valve 2d, and the pressing force acts on the reversing control port Kb5.
  • the directional valve 2e is reversed for overload protection, and has no control effect on the second control signal Signal-b;
  • the switching valve 3 includes: First main port P1, second main port P2, third main port A, fourth main port B and first control port Ka4, second control port Kb4, first main port P1, second main
  • the oil port P2 is respectively connected to the main valve port A and the energy collector port X, and the first main port A and the second main port B are respectively associated with the first port Ia of the pressure maintaining valve 2,
  • the fifth port Ib is connected, and the first control port Ka4 and the second control port Kb4 are respectively connected to the third control port Pp1 and the fourth control port Pp2 of the logic control unit 5;
  • the connection includes: the input Ka2 is connected to the first connection point S1 of the main valve input first control signal Signal-a, and the input Ka3 is connected to the main valve port (A) to the switching valve port (P1) At the first main oil passage E, the input Kb2 is
  • the logic control component 5 is a hydraulic logic control component, an electrical logic control component or an electro-hydraulic logic control component.
  • the signals Signal-a, Signal-b are hydraulic pressure signals and/or electrical signals, taken directly or indirectly from the operating handle.
  • the energy converter unit (1.1), (1.2) when the two working chambers (1.1c) and (1.2c) of the energy converter unit (1.1), (1.2) are connected to the pressure oil, the other two work.
  • the energy converter units (1.1), (1.2) synchronously lift the boom device through the rod pistons (1.1a), (1.2a) ( BOOM), at this time, the input hydraulic energy is converted into the potential energy of the boom device (BOOM); when the two working chambers (1.1b) and (1.2b) of the energy converter unit (1.1), (1.2) are connected to the pressure oil,
  • the boom device (BOOM) drives the rod pistons (1.1a) and (1.2a) of the energy converter units (1.1) and (1.2). The synchronous drop, when the potential energy of the boom device (BOOM) is converted into hydraulic energy.
  • Pressure energy holding valve 2 The pressure maintaining valve can prevent the pressure oil in the energy converter working chambers (1.1c) and (1.2c) from leaking and keeping moving when the boom device (BOOM) lifting and lowering operation is not performed. The position of the arm device in situ prevents the pressure in the energy converter working chambers (1.1c) and (1.2c) from being too high and damaging the components.
  • the switching valve 3 by correspondingly controlling the signals acting on the first control port Ka4 and the second control port Kb4, the following effects can be achieved: 1) by alternately turning on the main valve port (A) and the energy collector port ( X) to the energy converter (1.1c), (1.2c) two-chamber oil circuit, both for the purpose of collecting and utilizing potential energy and energy collector hot oil exchange cooling; 2) when the boom device rises and falls When the first main oil passage (E) and the second main oil passage (F) are at a pressure reaching the set pressure value of the logic control unit, the logic control unit is removed from the first control port Ka4 or the second control port Kb4. The signal, switching the valve back to the neutral position, can be used for normal operation without energy saving.
  • Energy Harvester 4 Collects both the potential energy of the boom unit (BOOM) and the power of the boom unit (BOOM).
  • the logic control component 5 is mainly used for detecting the pressure of the first main oil passage (E) or the second main oil passage (F). If the pressure does not reach the logic control component set value, the first control signal is directly or indirectly The control number of the signal-a and the second control signal Signal-b is introduced into the first control port Ka4 and the second control port Kb4 of the switching valve to perform the commutation control. Otherwise, the first control port Ka4 of the switching valve is removed, and the second control is performed. The signal of the action of the mouth Kb4.
  • the lifting operation process operating the handle signal to make the first control signal Signal-a effective, the main valve is switched to the left position under the action of the first control signal Signal-a, and the pressure of the main valve P oil path
  • the oil can be passed into the main valve A port, and the main valve B port returning oil can be introduced into the main valve returning oil path T.
  • the switching valve has two working states:
  • the logic control component introduces the first control signal Signal-a into the first control port Ka4 of the switching valve to cause The switching valve is shifted to the left position. At this time, the pressure from the main valve passes through the main valve A port, the first main port P1 and the fourth main port B of the switching valve, the fifth port Ib and the sixth oil of the pressure maintaining valve.
  • Port IIb, energy converter A2 enters the energy converter working chamber (1.2c), at the same time, the pressure collector of the energy collector passes through the X port, the switching valve second main port P2 and the third main port A, pressure
  • the first port Ia and the second port IIa of the valve and the port A1 of the energy converter can be kept into the working chamber (1.1c) of the energy converter.
  • the oil return of the working chamber (1.1b) (1.2b) of the energy converter can be The main valve B port and the main valve return oil path T flow back to the oil tank. Therefore, the energy converter performs the work lifting device through the pressure oil of the energy collector and the main valve, due to the energy collector.
  • the auxiliary function of the work the power of the required prime mover is automatically reduced.
  • the logic control component causes the first control port Ka4 of the switching valve to have no signal, and the switching valve operates.
  • the pressure oil from the main valve passes through the main valve A port and the first main port P1 of the switching valve, and is divided into two paths, one way from the third main port A, and the first port Ia of the pressure maintaining valve , the second port IIa, the energy converter A1 port enters the energy converter working chamber (1.1c), the other channel from the fourth main port B, the pressure energy holding valve fifth port Ib, the sixth port IIb, energy
  • the converter A2 port enters the energy converter working chamber (1.2c), and the oil return of the energy converter working chamber (1.1b) (1.2b) can flow back to the oil tank from the main valve B port and the return oil path T, thus, energy conversion
  • the device performs the energy-saving lifting work on the boom device (BOOM) under the action of the main valve pressure oil.
  • the lowering operation process the operating handle transmits a signal to make the second control signal Signal-b effective, the main valve is switched to the right position under the action of the second control signal Signal-b, and the pressure oil of the main valve P oil passage can be passed into the main Valve B port, the main valve A port oil can be introduced into the return line T, where the switching valve also has two working states:
  • the logic control component introduces the second control signal Signal-b into the second control port Kb4 of the switching valve to cause The switching valve is shifted into the right position.
  • the pressure oil from the main valve enters the energy converter working chamber (1.1b) (1.2b) through the main valve B port, and the energy converter unit (1.1) working chamber (1.1c) oil
  • the liquid enters the energy collector through the pressure energy holding valve second port IIa and the first port Ia, the third main port (A) and the second main port P2, and the energy converter unit (1.2) working chamber (1.2c)
  • the oil passes through the pressure energy holding valve sixth port IIb and the fifth port Ib, the third main port (A) and the first main port P1, the main valve A port and the return line T to the tank, Since the back pressure of the main valve A is small, the falling back pressure of the boom device (BOOM) is mainly generated by the energy collector, and thus the potential energy of the falling of the boom device
  • the logic control component causes the second control port Kb4 of the switching valve to have no signal, and the switching valve does not Reversing and working in the neutral position, at this time, the pressure oil from the main valve enters the energy converter working chamber (1.1b) (1.2b) through the main valve B port, and the energy converter working chamber (1.1c), (1.2c)
  • the oil passes through the third main port (A) and the fourth main port of the switching valve which can respectively hold the second port IIa of the valve and the first port Ia, the sixth port IIb and the fifth port Ib, and the switching valve.
  • the boom device (BOOM) can perform the conventional descent operation without energy storage.

Abstract

L'invention concerne un système de recyclage d'énergie destiné à un engin de travaux et comportant un convertisseur d'énergie, une vanne de maintien de pression, une vanne d'aiguillage, un collecteur d'énergie, une unité logique de commande, une vanne principale, un dispositif de bras mobile et des composants de liaison correspondants. En utilisant ce système, l'énergie potentielle générée pendant l'abaissement du dispositif de bras mobile peut être convertie de manière contrôlable en énergie hydraulique appelée à être stockée dans le collecteur d'énergie, et l'énergie potentielle peut également être directement recyclée pour agir sur le dispositif de bras mobile dans un mode d'équilibrage. La chaleur générée par le système hydraulique est ainsi réduite, la puissance d'entrée d'une machine motrice est réduite et l'objectif d'économie d'énergie est atteint.
PCT/CN2013/075812 2012-05-22 2013-05-17 Système de recyclage d'énergie pour engin de travaux WO2013174235A1 (fr)

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EP13794438.5A EP2853755B1 (fr) 2012-05-22 2013-05-17 Système de recyclage d'énergie pour engin de travaux
AU2013265872A AU2013265872B2 (en) 2012-05-22 2013-05-17 Working device energy recovery system
SG11201407604WA SG11201407604WA (en) 2012-05-22 2013-05-17 Working device energy recovery system

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CN201220232536.2 2012-05-22
CN2012202325362U CN202926765U (zh) 2012-05-22 2012-05-22 工作装置势能回收液压系统

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CN (1) CN202926765U (fr)
AU (1) AU2013265872B2 (fr)
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WO (1) WO2013174235A1 (fr)

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CN202926765U (zh) * 2012-05-22 2013-05-08 山河智能装备股份有限公司 工作装置势能回收液压系统
CN102678690B (zh) * 2012-05-22 2015-05-20 山河智能装备股份有限公司 工作装置势能回收液压系统
CN103671295B (zh) * 2013-12-17 2016-03-16 四川百世昌重型机械有限公司 一种闭式蓄能液压系统
CN104452850B (zh) * 2014-12-16 2017-05-31 山河智能装备股份有限公司 一种挖掘机动臂势能回收利用的方法及其控制装置
WO2017031066A1 (fr) * 2015-08-14 2017-02-23 Parker-Hannifin Corporation Récupération d'énergie potentielle de flèche d'excavateur hydraulique

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US20010035011A1 (en) * 1996-09-25 2001-11-01 Komatsu Ltd. Pressurized fluid recovery/reutilization system
US20080128214A1 (en) * 2005-02-25 2008-06-05 Mitsubishi Heavy Industries, Ltd. Energy Recovering Method and System in Hydraulic Lift Device of Battery Operated Industrial Trucks
CN101438064A (zh) * 2006-07-10 2009-05-20 卡特彼勒日本有限公司 作业机械中的液压控制系统
CN102094434A (zh) * 2011-01-11 2011-06-15 浙江大学 油液混合动力挖掘机动臂势能差动回收系统
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CN202926765U (zh) * 2012-05-22 2013-05-08 山河智能装备股份有限公司 工作装置势能回收液压系统

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EP2853755B1 (fr) 2017-03-29
AU2013265872B2 (en) 2017-03-09
SG11201407604WA (en) 2015-01-29
EP2853755A4 (fr) 2015-07-08
EP2853755A1 (fr) 2015-04-01
AU2013265872A1 (en) 2014-12-04

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