KR940002512A - Road sensing hydraulic automatic control device of construction machine - Google Patents

Road sensing hydraulic automatic control device of construction machine Download PDF

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Publication number
KR940002512A
KR940002512A KR1019920013324A KR920013324A KR940002512A KR 940002512 A KR940002512 A KR 940002512A KR 1019920013324 A KR1019920013324 A KR 1019920013324A KR 920013324 A KR920013324 A KR 920013324A KR 940002512 A KR940002512 A KR 940002512A
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KR
South Korea
Prior art keywords
pressure
actuator
accumulator
control valve
hydraulic
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KR1019920013324A
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Korean (ko)
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KR950002377B1 (en
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안병천
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김형벽
현대중장비산업주식회사
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Priority to KR1019920013324A priority Critical patent/KR950002377B1/en
Publication of KR940002512A publication Critical patent/KR940002512A/en
Application granted granted Critical
Publication of KR950002377B1 publication Critical patent/KR950002377B1/en

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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
    • F15B9/00—Servomotors with follow-up action, e.g. obtained by feed-back control, i.e. in which the position of the actuated member conforms with that of the controlling member
    • F15B9/02—Servomotors with follow-up action, e.g. obtained by feed-back control, i.e. in which the position of the actuated member conforms with that of the controlling member with servomotors of the reciprocatable or oscillatable type
    • F15B9/08—Servomotors with follow-up action, e.g. obtained by feed-back control, i.e. in which the position of the actuated member conforms with that of the controlling member with servomotors of the reciprocatable or oscillatable type controlled by valves affecting the fluid feed or the fluid outlet of the servomotor

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Operation Control Of Excavators (AREA)

Abstract

건설기계의 로드센싱 제어장치에 관한 것으로 특히 유압 액츄에이터의 부하 압력의 크기에 따라 축압기 및 밸브들의 조합으로 구성된 장치에 의해 공급 압력 및 유량을 자동제어 하는 부하감지(로드센싱)제어에 관한 것으로 작업 액츄에이터 (20)에서 발생하는 과부하 압력 변화에 대해 축압기(12)에 저장시킨 압유를 이용하여 자동제어하는 로드센싱 유압제어장치로서 배기 용적 가변수단을 갖는 유압펌프 (4)와 토출되는 유량을 작업 조절레버(7)에 의해 작업 액츄에이터에 유입되는 유량을 조절하는 방향유량 제어밸브(9)와 각 부위의 입.출구 압력을 측정하는 압력 측정장치(16)(17)(18)(19) 축압기에 유입되는 압유의 압력을 제어하는 압력제어밸브 (10)와 축압기에 저장된 압유가 여류되지 않도록 하는 방향 제어 밸브(11)와 압유로 부터 액츄에이터에 공급되는 압력 및 유량을 제어하는 전자비례 제어밸브(13)와 액츄에이터로 부터 축압기 쪼으로의 압유의 역류가 발생하지 않도록 하는 방향제어밸브(14)와 액츄에이터의 작동 방향에 따라 달라지는 유입 라인과 축압기의 압유 라인 사이를 연결시켜 주기 위한 3-way 솔레노이드 밸브(15)등으로 구성됨을 특징으로 하는 건설기계의 로드센싱 유압 자동제어장치.The present invention relates to a load sensing control device for a construction machine, and more particularly, to a load sensing control for automatically controlling supply pressure and flow rate by a device consisting of a combination of accumulators and valves according to the load pressure of a hydraulic actuator. A load sensing hydraulic control device that automatically controls the overload pressure change generated by the actuator 20 by using the pressure oil stored in the accumulator 12, and operates the hydraulic pump 4 having the exhaust volume variable means and the discharged flow rate. Axial flow rate control valve 9 for adjusting the flow rate into the working actuator by the control lever 7 and pressure measuring devices 16, 17, 18 and 19 for measuring inlet and outlet pressure of each part. A pressure control valve 10 for controlling the pressure of the hydraulic oil flowing into the pressure injector and a direction control valve 11 for preventing the hydraulic oil stored in the accumulator from flowing into the actuator are supplied to the actuator. The inflow line and the accumulator vary depending on the direction of operation of the actuator and the direction control valve 14 to prevent the reverse flow of pressure oil from the actuator to the proportional control valve 13 and the actuator to control the pressure and flow rate. 3-way solenoid valve (15) for connecting between the oil pressure lines of the construction machinery, characterized in that the load sensing hydraulic automatic control device.

Description

건설기계의 로드센싱 유압 자동제어장치Road sensing hydraulic automatic control device of construction machine

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제 1 도는 본 발명에 의한 건설기계의 축압기를 이용한 로드센싱 전자-유압 제어장치 계통도.1 is a schematic diagram of a load sensing electro-hydraulic control device using an accumulator of a construction machine according to the present invention.

제 2 도는 본 발명 복수개의 작업 조절 레버에 의한 축압기 제어방식 로드센싱 유압 제어장치 계통도.2 is a flow diagram of a pressure accumulator control type load sensing hydraulic control device by a plurality of work control lever of the present invention.

제 3 도는 본 발명의 축압기 제어방식 로드센싱 유압제어를 위한 흐름도.3 is a flow chart for accumulator control method load sensing hydraulic pressure control of the present invention.

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

1 : 제어기(controller) 2 : 원동기(엔진)1: controller 2: prime mover (engine)

3 : 엔진 회전수 계측기(sensor) 4 : 가변용량형 유압펌프3: engine speed sensor (sensor) 4: variable displacement hydraulic pump

5 : 전자비례 감압 밸브 6 : 서보 포지셔너(servo positioner)5: electromagnetic proportional pressure reducing valve 6: servo positioner

7 : 작업 조절 레버(joystick) 8 : 고정 용량형 펌프7 work joystick 8 fixed capacity pump

9 : 방향 유량 제어 밸브 10 : 압력제어 밸브9: directional flow control valve 10: pressure control valve

11 : 방향제어(check)밸브 12 : 축압기(accumulator)11: check valve 12: accumulator

13 : 전자비례제어밸브 14 : 방향제어(check)밸브13: Electronic proportional control valve 14: Directional check valve

15 : 3-wat솔레노이드 밸브 16, 17, 18, 19 : 압력 측정 장치15: 3-wat solenoid valve 16, 17, 18, 19: pressure measuring device

20 : 작업 액츄에이터20: working actuator

Claims (2)

작업 액츄에이터(20)에서 발생하는 과부하 압력 변화에 대해 축압기(12)에 저장시킨 압유를 이용하여 자동제어하는 로드센싱 유압제어장치로서 배기 용적 가변수단을 갖는 유압 펌프(4)와 토출 되는 유량을 작업 조절레버(7)에 의해 작업 액츄에이터에 유입되는 유량을 조절하는 방향유량 제어밸브(9)와, 각 부위의 입ㆍ출구 압력을 측정하는 압력측정장치(16) (17) (18) (19) 축압기에 유입되는 압유의 압력을 제어하는 압력제어 밸브(10)와 축압기에 저장된 압유가 역류되지 않도록 하는 방향 제어 밸브(11)와 압유로부터 액츄에이터에 공급되는 압력 및 유량을 제어하는 전자비례 제어밸브(13)와, 액츄에이터로부터 축압기 쪽으로의 압유의 역류가 발생하지 않도록 하는 방향제어 밸브(14)와 액츄에이터의 작동방향에 따라 달라지는 유입 라인과 축압기의 압유 라인 사이를 연결시켜 주기 위한 3-way를 솔레노이드 밸브(15) 등으로 구성됨을 특징으로 하는 "건설기계의 로드센싱 유압 자동제어장치".A load sensing hydraulic controller which automatically controls the overload pressure change generated by the work actuator 20 by using the pressure oil stored in the accumulator 12. The hydraulic pump 4 having the exhaust volume variable means and the discharged flow rate Directional flow control valve (9) for adjusting the flow rate into the work actuator by the work control lever (7) and pressure measuring device (16) (17) (18) (19) ) The pressure control valve 10 for controlling the pressure of the hydraulic oil flowing into the accumulator, the direction control valve 11 for preventing the hydraulic oil stored in the accumulator from flowing back and the electrons for controlling the pressure and flow rate supplied to the actuator from the hydraulic oil The proportional control valve 13 and the inlet line and the accumulator pressure depending on the operating direction of the actuator and the direction control valve 14 to prevent the reverse flow of the hydraulic oil from the actuator to the accumulator. "Way-sensing hydraulic automatic control device for construction machinery", characterized in that consisting of a three-way solenoid valve (15) for connecting the phosphorus. 작업 액츄에이터(20)의 부하압력 변동을 회전수센서(3)으로서 측정하고, 축압기(12)에 저장된 압유의 압력을 측정할 수 있는 수단과 축압기의 압유를 액츄에이터에 공급할 수 있는지를 판단할 수 있는 수단과 측정과 부하압력으로부터 축압기에 저장된 압유의 일부를 제어하는 전자비례 제어 밸브의 입력신호의 크기를 연산하는 연산수단과 액츄에이터의 입ㆍ출구 압력을 측정하여 작동 방향을 판단할 수 있는 판단수단과 이 판단에 근거하여 축압기로부터의 압유가 액츄에이터의 입구측과 연결될 수 있도록 하는 연산 제어수단과 각각의 액츄에이터의 입ㆍ출구 압력을 측정하여 각각의 필요한 압력 및 유량을 연산하는 연산 수단과 잉 연산에 의해서 축압기의 압유를 각 액츄에이터에 적절히 조절 공급시켜 주기 위한 제어수단 등으로 구성됨을 특징으로 하는 "건설기계의 로드센싱 유압 자동제어장치".The load pressure variation of the work actuator 20 is measured as the rotation speed sensor 3, and means for measuring the pressure of the pressure oil stored in the accumulator 12 and it is determined whether the pressure oil of the accumulator can be supplied to the actuator. The operating direction can be determined by measuring the inlet and outlet pressure of the actuator and the calculation means for calculating the magnitude of the input signal of the electromagnetic proportional control valve that controls the part of the hydraulic oil stored in the accumulator from the measurement and the load pressure. A judging means and arithmetic control means for allowing the oil pressure from the accumulator to be connected to the inlet side of the actuator based on the judgment; It is composed of control means for controlling and supplying the pressure oil of the accumulator to each actuator by the Ying operation. "Load-sensing hydraulic automatic control system for a construction machine" that. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019920013324A 1992-07-25 1992-07-25 Hydraulic autocontrol device for load sensing of constructive machines KR950002377B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019920013324A KR950002377B1 (en) 1992-07-25 1992-07-25 Hydraulic autocontrol device for load sensing of constructive machines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019920013324A KR950002377B1 (en) 1992-07-25 1992-07-25 Hydraulic autocontrol device for load sensing of constructive machines

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KR940002512A true KR940002512A (en) 1994-02-17
KR950002377B1 KR950002377B1 (en) 1995-03-17

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100872218B1 (en) 2007-04-18 2008-12-05 엘지전자 주식회사 Controlling apparatus for dryer
KR100872234B1 (en) 2007-04-18 2008-12-05 엘지전자 주식회사 Clogging detecting method for dryer
KR101438229B1 (en) * 2007-12-27 2014-09-15 두산인프라코어 주식회사 Hydraulic oil supply system for construction machinery
KR101184407B1 (en) * 2011-04-21 2012-09-19 한라아이엠에스 주식회사 Flowmeter for valve remote control system

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