KR950700493A - 유압재생장치 - Google Patents

유압재생장치

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Publication number
KR950700493A
KR950700493A KR1019940702600A KR19940702600A KR950700493A KR 950700493 A KR950700493 A KR 950700493A KR 1019940702600 A KR1019940702600 A KR 1019940702600A KR 19940702600 A KR19940702600 A KR 19940702600A KR 950700493 A KR950700493 A KR 950700493A
Authority
KR
South Korea
Prior art keywords
hydraulic
signal
regeneration device
valve
pressure
Prior art date
Application number
KR1019940702600A
Other languages
English (en)
Inventor
도이찌 히라다
겐로꾸 스기야마
마시미 오찌아이
Original Assignee
오까다 하지메
히다찌 겐끼 가부시기가이샤
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 오까다 하지메, 히다찌 겐끼 가부시기가이샤 filed Critical 오까다 하지메
Publication of KR950700493A publication Critical patent/KR950700493A/ko

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B4/00—Shrinkage connections, e.g. assembled with the parts at different temperature; Force fits; Non-releasable friction-grip fastenings
    • 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
    • E02F9/2282—Systems using center bypass type changeover valves
    • 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
    • E02F9/2221—Control of flow rate; Load sensing arrangements
    • 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
    • E02F9/2296—Systems with a variable displacement pump
    • 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
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
    • F15B11/024—Systems essentially incorporating special features for controlling the speed or actuating force of an output member by means of differential connection of the servomotor lines, e.g. regenerative circuits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L47/00—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics
    • 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
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
    • F15B11/024—Systems essentially incorporating special features for controlling the speed or actuating force of an output member by means of differential connection of the servomotor lines, e.g. regenerative circuits
    • F15B2011/0243—Systems essentially incorporating special features for controlling the speed or actuating force of an output member by means of differential connection of the servomotor lines, e.g. regenerative circuits the regenerative circuit being activated or deactivated automatically
    • 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
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
    • F15B11/024—Systems essentially incorporating special features for controlling the speed or actuating force of an output member by means of differential connection of the servomotor lines, e.g. regenerative circuits
    • F15B2011/0246—Systems essentially incorporating special features for controlling the speed or actuating force of an output member by means of differential connection of the servomotor lines, e.g. regenerative circuits with variable regeneration flow
    • 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
    • F15B2211/205—Systems with pumps
    • F15B2211/2053—Type of pump
    • F15B2211/20546—Type of pump variable capacity
    • 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
    • F15B2211/205—Systems with pumps
    • F15B2211/20576—Systems with pumps with multiple pumps
    • 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
    • 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
    • F15B2211/30525—Directional control valves, e.g. 4/3-directional control valve
    • 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
    • F15B2211/30565—Assemblies of multiple valves having multiple valves for a single output member, e.g. for creating higher valve function by use of multiple valves like two 2/2-valves replacing a 5/3-valve
    • F15B2211/3058—Assemblies of multiple valves having multiple valves for a single output member, e.g. for creating higher valve function by use of multiple valves like two 2/2-valves replacing a 5/3-valve having additional valves for interconnecting the fluid chambers of a double-acting actuator, e.g. for regeneration mode or for floating mode
    • 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
    • F15B2211/31—Directional control characterised by the positions of the valve element
    • F15B2211/3105—Neutral or centre positions
    • F15B2211/3116—Neutral or centre positions the pump port being open in the centre position, e.g. so-called open centre
    • 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
    • F15B2211/315—Directional control characterised by the connections of the valve or valves in the circuit
    • F15B2211/3157—Directional control characterised by the connections of the valve or valves in the circuit being connected to a pressure source, an output member and a return line
    • F15B2211/31576—Directional control characterised by the connections of the valve or valves in the circuit being connected to a pressure source, an output member and a return line having a single pressure source and a single output member
    • 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
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/63—Electronic controllers
    • F15B2211/6303—Electronic controllers using input signals
    • 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
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/63—Electronic controllers
    • F15B2211/6303—Electronic controllers using input signals
    • F15B2211/6306—Electronic controllers using input signals representing a pressure
    • F15B2211/6309—Electronic controllers using input signals representing a pressure the pressure being a pressure source supply 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
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/63—Electronic controllers
    • F15B2211/6303—Electronic controllers using input signals
    • F15B2211/6306—Electronic controllers using input signals representing a pressure
    • F15B2211/6313—Electronic controllers using input signals representing a pressure the pressure being a load 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
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/63—Electronic controllers
    • F15B2211/6303—Electronic controllers using input signals
    • F15B2211/6306—Electronic controllers using input signals representing a pressure
    • F15B2211/6316—Electronic controllers using input signals representing a pressure the pressure being a pilot 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
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/63—Electronic controllers
    • F15B2211/6303—Electronic controllers using input signals
    • F15B2211/6346—Electronic controllers using input signals representing a state of input means, e.g. joystick position
    • 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
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/665—Methods of control using electronic components
    • F15B2211/6654—Flow rate 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
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/665—Methods of control using electronic components
    • F15B2211/6655—Power control, e.g. combined pressure and flow rate 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
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/67—Methods for controlling pilot 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
    • F15B2211/70—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
    • F15B2211/705—Output members, e.g. hydraulic motors or cylinders or control therefor characterised by the type of output members or actuators
    • F15B2211/7058—Rotary output members
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    • 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
    • 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
    • F15B2211/75—Control of speed of the output member
    • 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)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

가변용량형의 유압펌프(1)로부터 공급되는 압유에 의해 작동하는 복수의 액튜에이터(4,5)와,유압펌프와 상기 복수의 액튜에이터와의 사이에 각각 배설되어 대응하는 액튜에이터에 공급되는 압유의 흐름을 제어하는 복수의 방향전환밸브(2,3)를 구비한 유압구동장치에 배설되고, 복수의 방향전환밸브중 최소한 하나의 방향전환밸브(2)의 탱크포트(23)와 탱크(9)와를 연락하는 제1라인(12)에 배설되어, 제어신호(PX)에 따라서 탱크포트로부터 탱크에 흐르는 유량을 제어하는 가변저항수단(6:60)과, 상기 제1라인의 가변저항수단보다 상류층의 부분과 상기 방향전환밸브의 펌프포트(24)에 접속된 제 2 라인(10C)과를 연락하는 제 3 라인(14)과, 상기 제 3 라인에 배설되어 제 1 라인으로부터 제 2 라인으로 향하는 압유의 흐름만을 허용하는 체크밸브(7)를 구비한 유압재생장치, 이 유압재생장치는,(a) 상기 액튜에이터(4)의 작동에 관련하는 상태량(Pd; Ph; Pia1, Pia2; Pib1,Pib2)을 검출하는 검출수단(101; 106; 102a,102b; 103a, 103b)과; (b) 상기 검출수단으로부터의 신호를 입력하여, 미리 기억한 관계에 따라서 상기 상태량에 따른 구동신호(i;1*)를 생성하는 제어수단(100;100A∼100H)과; (c) 상기 구동신호를 입력하여, 그 구동신호에 따라서 상기 제어신호(Px)를 생성하는 제어신호발생수단(105)과; 를 구비하고, 가변저항수단의 특성을 임의로 설정할 수 있도록 하여, 재생유량의 급격한 변화를 회필할 수 있도록 한다.

Description

유압재생장치
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제 1 도는 본 발명의 제 1 의 실시예에 의한 유압재생장치를 구비한 유압구동장치의 전체구성을 나타낸 개략도이다.

Claims (17)

  1. 가변용량형의 유압펌프(1)로부터 공급되는 압유에 의해 작동하는 복수의 액튜에이터(4,5)와, 상기 유압펌프와 상기 복수의 액튜에이터와의 사이에 각각 배설되어 대응하는 액튜에이터에 공급되는 압유의 흐름을 제어하는 복수의 방향전환밸브(2,3)를 구비한 유압구동장치에 배설되고, 상기 복수의 방향전환밸브중 최소한 하나의 방향전환밸브(2)의 탱크포트(23)와 탱크(9)와를 연락하는 제 1 라인(12)에 배설되어, 제어신호(Px)에 따라서 탱크포트로부터 탱크에 흐르는 유량을 제어하는 가변저항수단(6; 60)과, 상기 제 1 라인의 가변저항수단보다 상류측의 부분과 상기 방향전환밸브의 펌프포트(24)에 접속된 제 2 라인(10C)과를 연락하는 제 3 라인(14)과, 상기 제 3 라인에 배설되어 제 1 라인으로 부터 제 2 라인으로 향하는 압유의 흐름만을 체크밸브(7)를 구비한 유압재생장치에 있어서, (a) 상기 액튜에이터(4)의 작동에 관련하는 상태량(Pd; Ph; Pia1, Pia2; Pib1,Pib2)을 검출하는 검출수단(101; 106; 102a,102b; 103a, 103b)과; (b) 상기 검출수단으로부터의 신호를 입력하여, 미리 기억한 관계에 따라서 상기 상태량에 따른 구동신호(i;1*)를 생성하는 제어수단(100;100A∼100H)과; (c) 상기 구동신호를 입력하여, 그 구동신호에 따라서 상기 제어신호(Px)를 생성하는 제어신호발생수단(105)과; 를 구비한 것을 특징으로 하유압재생장치.
  2. 제 1 항에 있어서, 상기 상태량은 상기 방향전환밸브(2)에 대응하는 액튜에이터(4)의 작동에 의해 변화하는 압력(Pd;Ph)인 것을 특징으로 하는 유압재생장치.
  3. 제 2 항에 있어서, 상기 미리 기억한 관계는 상기 상태량으로서의 압력(Pd;Ph)의 단위량 변화에 대한 상기 가변저항수단(6; 60)으로부터의 유출유량의 변화가 상기 압력(Pd;Ph)으로 상기 가변저항수단을 직접 구동했을 때보다 작아지도록, 상기 입력(Pd;Ph)과 상기 구동신호(i)와의 관계가 설정되어 있는 것을 특징으로 하는 유압재생장치.
  4. 제 2 항에 있어서, 상기 상태량으로서의 압력은 상기 유압펌프(1)의 토출압력(Pd)인 것을 특징으로 하는 유압재생장치.
  5. 제 2 항에 있어서, 상기 상태량으로서의 압력은 상기 방향전환밸브(2)에 대응하는 액튜에이터(4)의 부하압력(Ph)인 것을 특징으로 하는 유압재생장치.
  6. 제 1 항에 있어서, 상기 상태량은 상기 방향전환밸브(2)에 부여되어 대응하는 액튜에이터(4)의 작동을 지령하는 조작신호(Pia1,PIa2)인 것을 특징으로 하는 유압재생장치.
  7. 제 6 항에 있어서, 상기 미리 기억한 관계는 상기 상태량으로서의 조작신호(Pia1,Pia2)의 단위량 변화에 대한 상기 가변저항수단(6; 60)에 의해 제 2 라인(12)에 생기는 압력변화가 상기 조작신호로 상기 가변저항수단을 직접 구동했을 때보다 작아지도록, 상기 조작신호(Pia1,Pia2)와 상기 구동신호(i)와의 관계가 설정되어 있는 것을 특징으로 하는 유압재생장치.
  8. 제 6 항에 있어서, 상기 방향전환밸브가 파일롯조작식의 밸브(2)이고, 상기 상태량으로서의 조작신호는 상기 방향전환밸브에 부여되는 파일롯압력(Pia1,Pia2)인 것을 특징으로 하는 유압재생장치.
  9. 제 1 항에 있어서, 상기 상태량은 상기 방향전환밸브(2)에 대응하는 액튜에이터(4)의 작동에 의해 변화하는 압력(Pd; Ph)과, 상기 방향전환밸브의 부여되는 대응하는 액튜에이터의 작동을 지령하는 조작신호(Pia1,Pia2)이고, 상기 제어수단(100C; 100E; 100F; 100G)은 상기 압력과 조작신호와를 조합하여 상기 구동신호(i*)를 생성하는 수단(114)를 가진 것을 특징으로 하는 유압재생장치.
  10. 제 1 항에 있어서, 상기 상태량은 상기 방향전환밸브(2)에 부여되어 대응하는 액튜에이터(4)의 작동을 지령하는 조작신호(Pia1,Pia2)와, 다른 방향전환밸브(3)에 부여되어 대응하는 액튜에이터(5)의 작동을 지령하는 조작신호(Pib1,Pib2)이고, 상기 제어수단(100D∼100G)은 상기 두 조작신호를 조합하여 상기 구동신호(i*)를 생성하는 수단(114)를 가진 것을 특징으로 하는 유압재생장치.
  11. 제 1 항에 있어서, 상기 상태량은 상기 방향전환밸브(2)에 대응하는 액튜에이터(4)의 작동에 의해 변화하는 압력(Pd; Ph)과, 상기 방향전환밸브에 부여되어 대응하는 액튜에이터의 작동을 지령하는 조작신호(Pia1,Pia2)와, 다른 방향전환밸브(3)에 부여되어 대응하는 액튜에이터의 작동을 지령하는 조작신호(Pib1,Pib2)이고, 상기 제어수단(100E∼100G)은 상기 압력과 상기 두 조작신호를 조합하여 상기 구동신호를 생성하는 수단(114)을 가진 것을 특징으로 하는 유압재생장치.
  12. 제 1 항에 있어서, 상기 제어수단(100F)에 모드신호를 출력하는 모드스위치수단(104)을 더 구비하고, 상기 제어수단(100F)은 상기 미리 기억한 관계로서 상기 상태량((Pia1,Pia2,Pib1,Pib2)과 상기 구동신호(i)와의 복수의 관계를 기억한 기억수단(110e,110f)과, 상기 모드신호에 따라서 상기 복수의 관계의 하나에 따라서 상기 구동신호를 생성하는 선택수단(115)를 가진 것을 특징으로 하는 유압재생장치.
  13. 제 1 항에 있어서, 상기 제어수단(100G)에 선택신호를 출력하는 재생선택스위치수단(104A)을 더 구비하고, 상기 제어수단(100G)은 상기 선택신호에 따라서 상기 구동신호(i*)의 출력을 전환하는 전환수단(160)을 가진 것을 특징으로 하는 유압재생장치.
  14. 제 1 항에 있어서, 상기 가변저항수단이 가변스로틀(6a)을 가진 밸브수단(6)인 것을 특징으로 하는 유압재생장치.
  15. 제 1 항에 있어서, 상기 가변저항수단이 가변릴리프밸브(6)인 것을 특징으로 하는 유압재생장치.
  16. 제 1 항에 있어서, 상기 제어신호발생수단이 파일롯압력(Px)을 발생하는 전자(電磁)비례밸브(105)인 것을 특징으로 하는 유압재생장치.
  17. 제 1 항에 있어서, 상기 검출수단(101; 106)과 상기 제어수단(100; 100A; 100C; 100E∼100H)과의 사이에 배치되고, 상기 검출수단으로부터의 신호의 저주파수성분을 제거하는 로패스필터(120)을 더 구비한 것을 특징으로 하는 유압재생장치.
    ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
KR1019940702600A 1992-12-04 1993-12-03 유압재생장치 KR950700493A (ko)

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EP0629781A4 (en) 1995-04-26
DE69302012D1 (de) 1996-05-02
EP0629781B1 (en) 1996-03-27
US5442912A (en) 1995-08-22
DE69302012T2 (de) 1996-09-05
WO1994013959A1 (en) 1994-06-23

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