KR970001761A - Improved operability of excavators Flow control device - Google Patents

Improved operability of excavators Flow control device Download PDF

Info

Publication number
KR970001761A
KR970001761A KR1019950017192A KR19950017192A KR970001761A KR 970001761 A KR970001761 A KR 970001761A KR 1019950017192 A KR1019950017192 A KR 1019950017192A KR 19950017192 A KR19950017192 A KR 19950017192A KR 970001761 A KR970001761 A KR 970001761A
Authority
KR
South Korea
Prior art keywords
pressure
control
line
electronic controller
valve
Prior art date
Application number
KR1019950017192A
Other languages
Korean (ko)
Other versions
KR0162960B1 (en
Inventor
조종문
Original Assignee
석진철
대우중공업 주식회사
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 석진철, 대우중공업 주식회사 filed Critical 석진철
Priority to KR1019950017192A priority Critical patent/KR0162960B1/en
Priority to JP8162733A priority patent/JP2677983B2/en
Publication of KR970001761A publication Critical patent/KR970001761A/en
Application granted granted Critical
Publication of KR0162960B1 publication Critical patent/KR0162960B1/en

Links

Classifications

    • 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
    • E02F9/2225—Control of flow rate; Load sensing arrangements using pressure-compensating valves
    • E02F9/2228—Control of flow rate; Load sensing arrangements using pressure-compensating valves including an electronic controller
    • 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
    • E02F9/2239—Control of flow rate; Load sensing arrangements using two or more pumps with cross-assistance
    • E02F9/2242—Control of flow rate; Load sensing arrangements using two or more pumps with cross-assistance including an electronic controller
    • 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
    • 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
    • E02F9/2292—Systems with two or more pumps

Abstract

본 발명은 굴삭기의 조작성 향상 유량제어장치에 관한 것으로, 주유압펌프(101,102)의 압유공급라인(L1,L2)이 메인콘트롤밸브(204)를 통해서 네가콘 라인(L7,L8)과 연결되어 이 네가콘라인의 지령압력이 높으면 유량을 감소시키는 반면에 지령압력이 낮으면 유량을 증가시키는 네가콘 유량제어수단과, 작동기 제어스푸울의 절환순간을 압력스위치(214,215)를 매개로 감지해서 상기 네가콘 유량제어수단에 지연제어압력을 인가하여 지연제어를 실시하는 지연제어수단을 갖춤과 더불어,부움조이스틱(117)과 그 제어스푸울(109)사이의 부움상승쪽 파일롯트라인(L10)에 압력스위치(1)가 설치됨과 더불어 상기아암조이스틱(2)과 스윙조이스틱(5)의 각 파일롯트라인(L20,L21;L22,L23)이 셔틀밸브(3,6)를 매개로 서로 연결되면서 각셔틀밸브(3,6)에 압력스위치(4,7)가 연결되는 한편, 상기 각 압력스위치(1,4,7)는 전자제어기(216)와 전기적으로 연결된구조로 되어, 상기 압력스위치(7)로부터 전류신호가 전자제어기(216)에 인가되면, 이 전자제어기(216)가 전자비례감압밸브(209)에 제어전류를 인가시키지 않으므로써 지연제어를 실시하지 않게 되어, 스윙속도를 향상시킬 수 있게 된 것이다.The present invention relates to a flow control device for improving the operability of an excavator, the pressure oil supply line (L1, L2) of the main hydraulic pump (101, 102) is connected to the negative cone line (L7, L8) through the main control valve 204 When the command pressure of the negative cone line is high, the flow rate is reduced, while when the command pressure is low, the switching time of the negative cone flow control means for increasing the flow rate and the actuator control spring is sensed through the pressure switches 214 and 215. It is equipped with a delay control means for applying delay control pressure to the cone flow control means to perform delay control, and the pressure on the boolean rising pilot line L10 between the boom joystick 117 and its control spring 109. In addition to the switch 1 is installed, each pilot line (L20, L21; L22, L23) of the arm joystick (2) and the swing joystick (5) are connected to each other via a shuttle valve (3, 6) each shuttle As long as pressure switches 4 and 7 are connected to valves 3 and 6 Each of the pressure switches 1, 4, and 7 is electrically connected to the electronic controller 216. When the current signal from the pressure switch 7 is applied to the electronic controller 216, the electronic controller 216 By not applying the control current to the electromagnetic proportional pressure reducing valve 209, delay control is not performed and the swing speed can be improved.

Description

굴삭기의 조작성 향상 유량제어장치Improved operability of excavators Flow control device

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

제1도는 본 발명에 따른 유압제어장치의 개략적인 유압회로도, 제2도는 종래 굴삭기에서 채택하고 있는 네가콘 시스템의 유량제어장치를 도시한 유압회로도, 제3도는 유량제어밸브의 스푸울이 개구되는 면적과 이 스푸울의 행정과의 관계를 도시한 그래프, 제4도는 펌프의 토출유량과 네가콘 압력과의 관계를 도시한 그래프, 제5도는 유량제어밸브를 거치지 않고 바이패스통로를 통하여 통과하는 유량과 네가콘 압력과의 상관관계를 도시한 그래프, 제8도는 종래 굴삭기의 조작성 향상 유량제어장치의 개략적인 유압회로도.1 is a schematic hydraulic circuit diagram of a hydraulic control device according to the present invention, Figure 2 is a hydraulic circuit diagram showing a flow control device of the negative-cone system adopted in the conventional excavator, Figure 3 is a sprue of the flow control valve opening A graph showing the relationship between the area and the stroke of this spool, FIG. 4 is a graph showing the relationship between the discharge flow rate of the pump and the negative pressure, and FIG. 5 is the flow rate passing through the bypass passage without passing through the flow control valve. Fig. 8 is a graph showing the correlation between the negative pressure and the negative pressure.

Claims (1)

주유압펌프(101,102)의 압유공급라인(L1,L2)이 메인콘트롤밸브(204)를 통해서 네가콘 라인(L7,L8)과 연결되어 이 네가콘 라인의 지령압력이 높으면 유량을 감소시키는 반면에 지령압력이 낮으면 유량을 증가시키는 네가콘 유량제어수단이 구비되고, 상기 주유압펌프(101,102)와 함께 구동되는 보조유압펌프(139)에서 토출되는 압유를 이송시키는 보조펌프라인(L13)에 조이스틱(117,2,5)으로 압유를 공급해 주기 위한 라인(L14)과 메인콘트롤밸브(204)내부에 구비되어 있는 로직라인(L15,L16)으로 압유를 공급하는 라인(L17)이 서로 병렬연결되며, 상기 보조펌프라인(L13)에 연결라인(L18)을 매개하여 전자비례감압밸브(209)가 연결되고, 이 전자비례감압밸브(209)의 출구가 상기 네가콘라인(L7,L8)은 셔틀밸브(210,211)의 입구와 연결되면서 이 셔틀밸브(210,211)의 출구는 상기 네가콘 유량제어수단과 연결되는 한편, 상기 로직라인(L15,L16)에는 로직오리피스(212,213)와 압력스위치(214,215)가 각각 설치됨과 더불어 이 압력스위치(214,215)에서 출력되는 전기신호는 전자제어기(216)로 입력되어 제어되게 연결되고, 이 전자제어기(216)의 출력단은 상기 전자비례감압밸브(209)의 솔레노이드(217)와 전기적으로 연결되어, 이 전자제어기(216)가 상기 압력스위치(214,215)를 매개로 메인콘트롤밸브(204)의 스푸울절환순간을 감지해서 전자비례감압밸브(209)에 일정시간동안 서서히 감소하는 제어전류를 인가시켜주유압펌프(101,102)의 토출유량을 제어하도록 된 굴삭기의 조작성 향상 유량제어장치에 있어서, 상기 부움조이스틱(117)과 그 제어스푸울(109)사이의 부움상승쪽 파일롯트라인(L10)에 압력스위치(1)가 설치됨과 더불어 상기 아암조이스틱(2)과 스윙조이스틱(5)의 각 파일롯트라인(L20,L21;L22,L23)이 셔틀밸브(3,6)를 매개로 서로 연결되면서 각 셔틀밸브(3,6)에 압력스위치(4,7)가 연결되는 한편, 상기 각 압력스위치(1,4,7)는 전자제어기(216)와 전기적으로 연결되어, 상기 스윙측 압력스위치(7)로부터 전류신호가 전자제어기(216)에 인가되면, 이 전자제어기(216)가 전자비례감압밸브(209)에제어전류를 인가시키지 않으므로써 지연제어를 실시하지 않도록 된 것을 특징으로 하는 굴삭기의 조작성 향상 유량제어장치.The pressure oil supply lines L1 and L2 of the main oil pressure pumps 101 and 102 are connected to the negative cone lines L7 and L8 through the main control valve 204 to reduce the flow rate when the command pressure of the negative pressure line is high. When the command pressure is low, a negative-cone flow rate control means for increasing the flow rate is provided, and a joystick to the auxiliary pump line L13 for transferring the pressure oil discharged from the auxiliary hydraulic pump 139 driven together with the main hydraulic pumps 101 and 102. The line L14 for supplying the pressure oil to (117, 2, 5) and the line L17 for supplying the pressure oil to the logic lines L15 and L16 provided in the main control valve 204 are connected in parallel with each other. In addition, the electromagnetic proportional pressure reducing valve 209 is connected to the auxiliary pump line L13 via a connection line L18, and the outlet of the electromagnetic proportional pressure reducing valve 209 is the negative cone lines L7 and L8. The outlet of the shuttle valves 210 and 211 is connected to the inlet of the valves 210 and 211. Logic lines (L15, L16) and logic orifices (212, 213) and pressure switches (214, 215) are installed in the logic lines (L15, L16), respectively, and electrical signals output from the pressure switches (214, 215) are controlled by the electronic controller (216). Is connected to the control unit, and the output terminal of the electronic controller 216 is electrically connected to the solenoid 217 of the electromagnetic proportional pressure reducing valve 209 so that the electronic controller 216 opens the pressure switches 214 and 215. By detecting the spoof switching moment of the main control valve 204 by applying a control current that gradually decreases for a predetermined time to the electronic proportional pressure reducing valve 209 to control the discharge flow rate of the main hydraulic pump (101, 102) In the improved flow control device, a pressure switch 1 is installed on the boom rising pilot line L10 between the boom joystick 117 and the control spout 109 and the arm joystick 2 is provided. Swing Each pilot line (L20, L21; L22, L23) of the stick (5) is connected to each other via the shuttle valves (3, 6), and the pressure switches (4, 7) are connected to each shuttle valve (3, 6). On the other hand, each of the pressure switch (1, 4, 7) is electrically connected to the electronic controller 216, when the current signal from the swing-side pressure switch 7 is applied to the electronic controller 216, the electronic controller And (216) does not apply the control current to the electromagnetic proportional pressure reducing valve (209), so that delay control is not performed. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019950017192A 1995-06-23 1995-06-23 Apparatus for controlling flowrate of hydraulic oil to improve handling an excavator KR0162960B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
KR1019950017192A KR0162960B1 (en) 1995-06-23 1995-06-23 Apparatus for controlling flowrate of hydraulic oil to improve handling an excavator
JP8162733A JP2677983B2 (en) 1995-06-23 1996-06-24 Excavator flow controller

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019950017192A KR0162960B1 (en) 1995-06-23 1995-06-23 Apparatus for controlling flowrate of hydraulic oil to improve handling an excavator

Publications (2)

Publication Number Publication Date
KR970001761A true KR970001761A (en) 1997-01-24
KR0162960B1 KR0162960B1 (en) 1999-01-15

Family

ID=19418109

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019950017192A KR0162960B1 (en) 1995-06-23 1995-06-23 Apparatus for controlling flowrate of hydraulic oil to improve handling an excavator

Country Status (2)

Country Link
JP (1) JP2677983B2 (en)
KR (1) KR0162960B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100805058B1 (en) * 2001-07-06 2008-02-20 두산인프라코어 주식회사 Hydraulic control system for trenching work mode of an excavator

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101281232B1 (en) * 2006-09-29 2013-07-02 두산인프라코어 주식회사 Apparatus for controlling displacement of variable displacement type of hydraulic pump
JP2008115989A (en) * 2006-11-07 2008-05-22 Hitachi Constr Mach Co Ltd Hydraulic drive mechanism for construction machine
JP2008115990A (en) * 2006-11-07 2008-05-22 Hitachi Constr Mach Co Ltd Hydraulic drive mechanism for construction machine
KR20130137192A (en) * 2010-12-27 2013-12-16 볼보 컨스트럭션 이큅먼트 에이비 Boom-swivel compound drive hydraulic control system of construction machine
WO2022209920A1 (en) * 2021-03-29 2022-10-06 日立建機株式会社 Work machine
CN115030246B (en) * 2022-05-23 2024-01-16 中联重科土方机械有限公司 Positive flow excavator, control method, control device and controller thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100805058B1 (en) * 2001-07-06 2008-02-20 두산인프라코어 주식회사 Hydraulic control system for trenching work mode of an excavator

Also Published As

Publication number Publication date
JP2677983B2 (en) 1997-11-17
KR0162960B1 (en) 1999-01-15
JPH093977A (en) 1997-01-07

Similar Documents

Publication Publication Date Title
US5148676A (en) Confluence valve circuit of a hydraulic excavator
US5852934A (en) Fluid joining device for power construction vehicles
KR970043644A (en) Hydraulic circuit of hydraulic excavator
GB1466605A (en) Hydraulic controls
KR20040110422A (en) control hydraulic circuit for hydraulic pump discharge flow
KR960008078A (en) Hydraulic circuit for boom cylinder of hydraulic excavator
KR970001761A (en) Improved operability of excavators Flow control device
US5493950A (en) Variable priority device for swing motor in heavy construction equipment
KR920701692A (en) Hydraulic oil supply circuit device to hydraulic cylinder for work machine
JPH08105078A (en) Variable priority device
JPH08302752A (en) Boom-lifting priority hydraulic circuit for hydraulic shovel
JP3149974B2 (en) Hydraulic circuit of excavator
JP2003120603A (en) Hydraulic circuit for construction machine
KR101281232B1 (en) Apparatus for controlling displacement of variable displacement type of hydraulic pump
JP3766972B2 (en) Hydraulic circuit for construction machinery
JPH06264901A (en) Oil pressure control device
JPH0914202A (en) Negative control circuit of construction equipment
JPS5939203Y2 (en) fluid control device
KR0166189B1 (en) Controller for the flowrate of an excavator
JP2557047Y2 (en) Pressure oil supply device
JP3738152B2 (en) Hydraulic control device for power shovel
KR960014681A (en) Improved operability of excavators Flow control device
JP2639554B2 (en) Hydraulic equipment
SU1472586A1 (en) Apf loading earth-moving machine on a test bed
KR960012405B1 (en) Fluid pressure control circuit

Legal Events

Date Code Title Description
A201 Request for examination
E701 Decision to grant or registration of patent right
GRNT Written decision to grant
FPAY Annual fee payment

Payment date: 20010702

Year of fee payment: 6

LAPS Lapse due to unpaid annual fee