KR960014681A - Improved operability of excavators Flow control device - Google Patents

Improved operability of excavators Flow control device Download PDF

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Publication number
KR960014681A
KR960014681A KR1019940025916A KR19940025916A KR960014681A KR 960014681 A KR960014681 A KR 960014681A KR 1019940025916 A KR1019940025916 A KR 1019940025916A KR 19940025916 A KR19940025916 A KR 19940025916A KR 960014681 A KR960014681 A KR 960014681A
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KR
South Korea
Prior art keywords
pressure
control valve
lines
line
electromagnetic proportional
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Application number
KR1019940025916A
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Korean (ko)
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KR0166117B1 (en
Inventor
박희우
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석진철
대우중공업 주식회사
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Priority to KR1019940025916A priority Critical patent/KR0166117B1/en
Publication of KR960014681A publication Critical patent/KR960014681A/en
Application granted granted Critical
Publication of KR0166117B1 publication Critical patent/KR0166117B1/en

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Classifications

    • 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

Abstract

본 발명은 굴삭기의 부하가 많이 걸리는 작동기가 급작스럽게 조작되어도, 펌프의 토출유량이 급격하게 증가되지 않게 하여 해당 작동기와 굴삭기의 차체가 흔들거리지 않도록 하여 안전성과 조작성을 향상시킬 수 있도록 한 굴삭기의 유량제어장치에 관한 것으로, 유압을 발생시키는 펌프(101,102)와 함께 구동되는 보조펌프(201)에서 토출되는 압유가 이송되는 보조펌프라인(202)에 조이스틱(117)으로 압유를 공급해 주기 위해 라인(203)과, 메인콘트롤밸브(204)내부에 구비되어 있는 로직라인(205,206)으로 압유를 공급하는 라인(207)이 서로 병렬 연결되고, 상기 보조펌프라인(202)에는 연결라인(208)을 매개하여 전자비례감압제어밸브(209)이 연결되어 있으며, 이 전자비례감압제어밸브(209)의 출구는 셔틀밸브(210,211)을 통하여 상기 메인콘트롤밸브(204)의 네가콘 라인(137,138)과 각각 연결되어 있는 한편, 상기 라인(205,206)에는 로직오리피스(212,213)와 압력스위치(214,2I5)가 각각 설치되어 있고, 상기 압력스위치(214,215)에서 출력되는 전기적신호는 전자제어기(216)로 입력되어 제어되도록 되어 있으며, 상기 전자제어기(216)의 출력단은 상기 전자비례감압제어밸브(209)의 솔레노이드(217)와 전기적으로 연결되어 있는 구조로 되어 있다.According to the present invention, even when an actuator that is heavily loaded with an excavator is suddenly operated, the discharge flow rate of the pump does not increase rapidly, so that the actuator and the vehicle body of the excavator are not shaken to improve safety and operability. The control apparatus, the line 203 for supplying the pressure oil to the joystick 117 to the auxiliary pump line 202 to which the pressure oil discharged from the auxiliary pump 201 driven together with the pump (101, 102) for generating the hydraulic pressure is conveyed ) And a line 207 for supplying pressure oil to the logic lines 205 and 206 provided in the main control valve 204 are connected in parallel to each other, and the auxiliary pump line 202 is connected to each other via a connection line 208. The electromagnetic proportional pressure control valve 209 is connected, and the outlet of the electromagnetic proportional pressure control valve 209 is connected to the negative control of the main control valve 204 through the shuttle valves 210 and 211. The lines 205 and 206 are respectively provided with logic orifices 212 and 213 and pressure switches 214 and 2I5, respectively. The electrical signals output from the pressure switches 214 and 215 are electronic controllers. 216 is controlled to be input, and the output terminal of the electronic controller 216 is electrically connected to the solenoid 217 of the electromagnetic proportional pressure control valve 209.

Description

굴삭기의 조작성 향상 유량제어장치Improved operability of excavators Flow control device

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음As this is a public information case, the full text was not included.

제1도는 본 발명에 따른 장치를 개략적으로 도시한 유압회로도.1 is a hydraulic circuit diagram schematically showing a device according to the invention.

Claims (2)

외부 지령압력(네가콘 압력)이 높으면 유량을 감소시키고, 이 지령압력이 낮으면 유량을 증가시키는 네가콘 유량제어를 실시하는 펌프(101,102)와 이 펌프의 유량을 공급 받아서 각각의 작동기로 유량을 분배시키는 메인 콘트롤밸브(204) 및 바이패스 유량으로 네가콘 압력을 출력하여 펌프의 토출량을 제어해주는 네가콘 라인(137,138)으로 구성된 굴삭기의 유량제어 시스템에 있어서, 유압을 발생시키는 펌프(101,102)와 함께 구동되는 보조펌프(201)에서 토출되는 압유가 이송되는 보조펌프라인(202)에 조이스틱(117)으로 압유를 공급해 주기 위한 라인(203)과, 메인콘트롤밸브(204)내부에 구비되어 있는 로직라인(205,206)으로 압유를 공급하는 라인(207)이 서로 병렬 연결되고, 상기 보조펌프라인(202)에는 연결라인(208)을 매개하여 전자비례감압제어밸브(209)이 연결되어 있으며, 이 전자비례감압제어밸브(209)의 출구는 셔틀밸브(210,211)을 통하여 상기 메인콘트롤 밸브(204)의 네가콘 라인(137,138)과 각각 연결되어 있는 한편, 상기 로직라인(205,206)에는 로직오리피스(212,213)와 압력스위치(214,215)가 각각 설치되어 있고, 상기 압력스위치(214,215)에서 출력되는 전기적신호는 전자제어기(216)로 입력되어 제어되도록 되어 있으며, 상기 전자제어기(216)의 출력단은 상기 전자비례감압제어밸브(209)의 솔레노이드(217)와 전기적으로 연결되어 있는 구조로 되어 있는 것을 특징으로 하는 굴삭기의 유량제어장치.If the external command pressure (Negacon pressure) is high, the flow rate is reduced, and if this command pressure is low, the pumps 101 and 102 perform negative flow control to increase the flow rate. In the excavator flow control system consisting of the main control valve 204 for distributing and the negative-cone lines (137, 138) for outputting the negative-cone pressure at the bypass flow rate to control the discharge amount of the pump, pumps (101, 102) for generating hydraulic pressure; Logic is provided in the line 203 for supplying the pressure oil to the joystick 117 to the auxiliary pump line 202 to which the pressure oil discharged from the auxiliary pump 201 driven together is transferred. Lines 207 for supplying pressure oil to lines 205 and 206 are connected in parallel to each other, and the auxiliary pump line 202 is connected to the electromagnetic proportional pressure control valve 209 via a connection line 208. The outlet of the electromagnetic proportional pressure reducing control valve 209 is connected to the negative cone lines 137 and 138 of the main control valve 204 through shuttle valves 210 and 211, respectively, while the logic lines 205 and 206 have logic Orifices 212 and 213 and pressure switches 214 and 215 are provided, respectively, and electrical signals output from the pressure switches 214 and 215 are inputted to be controlled by the electronic controller 216, and the output terminal of the electronic controller 216 is The flow rate control device of the excavator, characterized in that the structure is electrically connected to the solenoid 217 of the electromagnetic proportional pressure control valve (209). 제1항에 있어서, 상기 전자제어기(216)가 메인콘트롤러밸브(204)의 스푸울이 절환되는 순간을 감지한 신호를 입력받으면, 상기 전자비례제어감압밸브의 출력 압력이 높은 수준에서 부터 임의로 설정된 시간동안 서서히 감소하도록 전류치를 제어하도록 된 것을 특징으로 하는 굴삭기의 유량제어장치.According to claim 1, wherein the electronic controller 216 is arbitrarily set from a high level of the output pressure of the electronic proportional control pressure reducing valve when the electronic controller 216 receives a signal sensed when the sprue of the main controller valve 204 is switched An apparatus for controlling flow of an excavator, characterized in that the current value is controlled to gradually decrease during time. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019940025916A 1994-10-10 1994-10-10 Apparatus for controlling flow rate of hydraulic oil to improve handling an excavator KR0166117B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019940025916A KR0166117B1 (en) 1994-10-10 1994-10-10 Apparatus for controlling flow rate of hydraulic oil to improve handling an excavator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019940025916A KR0166117B1 (en) 1994-10-10 1994-10-10 Apparatus for controlling flow rate of hydraulic oil to improve handling an excavator

Publications (2)

Publication Number Publication Date
KR960014681A true KR960014681A (en) 1996-05-22
KR0166117B1 KR0166117B1 (en) 1998-12-01

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Application Number Title Priority Date Filing Date
KR1019940025916A KR0166117B1 (en) 1994-10-10 1994-10-10 Apparatus for controlling flow rate of hydraulic oil to improve handling an excavator

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100424216B1 (en) * 1999-09-08 2004-03-22 아하건설 주식회사 A coupling device of drainpipe

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100762078B1 (en) * 2003-07-23 2007-10-01 현대중공업 주식회사 Flow Control System of Hydraulic Pump for Excavators
KR20180037369A (en) * 2016-10-04 2018-04-12 두산인프라코어 주식회사 Contorl system for construction machinery and control method for construction machinery

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100424216B1 (en) * 1999-09-08 2004-03-22 아하건설 주식회사 A coupling device of drainpipe

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