KR950014497A - Automatic sequential boosting system of hydraulic circuit - Google Patents

Automatic sequential boosting system of hydraulic circuit Download PDF

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Publication number
KR950014497A
KR950014497A KR1019940029188A KR19940029188A KR950014497A KR 950014497 A KR950014497 A KR 950014497A KR 1019940029188 A KR1019940029188 A KR 1019940029188A KR 19940029188 A KR19940029188 A KR 19940029188A KR 950014497 A KR950014497 A KR 950014497A
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South Korea
Prior art keywords
pressure
hydraulic pump
set pressure
signal
discharge
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KR1019940029188A
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Korean (ko)
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KR0142899B1 (en
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마사카주 야나기사와
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카타다 테쭈야
카부시키가이샤 코마쯔세이사쿠쇼
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Publication of KR0142899B1 publication Critical patent/KR0142899B1/en
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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
    • E02F9/2221—Control of flow rate; Load sensing arrangements
    • E02F9/2232—Control of flow rate; Load sensing arrangements using one or more variable displacement pumps
    • 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
    • E02F9/2058—Electric or electro-mechanical or mechanical control devices of vehicle sub-units
    • E02F9/2095—Control of electric, electro-mechanical or mechanical equipment not otherwise provided for, e.g. ventilators, electro-driven fans
    • 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
    • E02F9/226—Safety arrangements, e.g. hydraulic driven fans, preventing cavitation, leakage, overheating
    • 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

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Control Of Positive-Displacement Pumps (AREA)
  • Operation Control Of Excavators (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

본 발명에 의하면 과부하가 작동했을 때, 우선 2단안전밸브의 제1설정압으로 릴리이프시켜, 소정시간후에 유압펌프의 토출랗을 감소시킨 다음 제1설정압보다 고압인 제2설정압으로 릴리이프시키도록 하여, 릴리이프할 때의 피이크압을 감소하여 유압기기리 내구성을 향상시킴과 아울러, 콘트로을러는 토출압검출기로부터 제1설정압신호를 입력한 다음 소정시간 후에, 유압펌프의 토출량이 감소된 시점에서 설정압 변환기에 제1설정압보다 높은 제2설정압신호를 출력하여, 안전밸브의 설정압을 순차승압시키도록 제어한다.According to the present invention, when the overload is activated, the relief is first released to the first set pressure of the two-stage safety valve, after which the discharge oil of the hydraulic pump is reduced after a predetermined time and then released to the second set pressure that is higher than the first set pressure. By reducing the peak pressure at the time of relief to improve hydraulic equipment durability, the controller also inputs the first set pressure signal from the discharge pressure detector and then discharges the hydraulic pump after a predetermined time. At a reduced time point, the second set pressure signal higher than the first set pressure is output to the set pressure converter to control the set pressure of the safety valve to be sequentially raised.

Description

유압회로의 자동순차 승압시스템Automatic sequential boosting system of hydraulic circuit

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

제l도는 본 발명의 실시예에 있어서의 유압셔블의 제어회로를 표시하는 도면1 is a diagram showing a control circuit of the hydraulic excavator in the embodiment of the present invention.

제2도는, 제1도의 제어회로에 있어서 콘트로을러의 상세를 표시하는 도면FIG. 2 is a diagram showing details of the controller in the control circuit of FIG.

제3도는, 제1도의 제어회로에 있어서 유압펌프의 토출압(P)과 펌프용량과의 관계를 표시하는 도면. 제4도는, 제3도에 있어서 유압펌프의 토출압(P)의 경시변화를 표시하는 도면3 is a diagram showing the relationship between the discharge pressure P of the hydraulic pump and the pump capacity in the control circuit of FIG. 4 is a diagram showing changes over time of the discharge pressure P of the hydraulic pump in FIG.

Claims (8)

유압회로의 최고압을 복수단으로 설정하는 안전밸브와, 이 안전밸브가 소정의 설정압에 있어서 연속하여 릴리이프한 시간을 검출하는 릴리이프 작동시간검출기와, 이 릴리이프 작동시간검출기가 저압측의 설정압으로 소정시간 릴리이프한 것을 검출한 후, 타례로 고압측의 설정압으로 바꾸는 설정압전환수단으로 이루어진 것을 특징으로 하는 유압회로의 자동순차 승압시스템.A safety valve for setting the maximum pressure of the hydraulic circuit in multiple stages, a relief operating time detector for detecting a time when the safety valve is continuously released at a predetermined set pressure, and the relief operating time detector is used for the low pressure side. And a set pressure switching means for detecting a predetermined time relief at a set pressure, and changing the set pressure to a set pressure on the high pressure side. 액츄에이터를 구동하기 위한 가변용량형 유압펌프(2)와, 이 유압펌프의 용량제어장치(8)와 이 용량제어장치의 제어압원과 상기한 유압펌프의 토출압검출기(18)와, 이 토출압검출기(18)에 의하여 검출되는 유압펌프의 토출압에 대하여 유압펌프의 웅량이 근본적으로 결정되는 단조감소함수가 되도록, 상기한 제어압원의 원압을 감압하여 상기한 용량제어장치(8)에 공급하는 홉수토오크제업밸브(10)와, 상기한 유압펌프의 최고압을 2단계로 설정하는 2단안전밸브(5)와, 이 2단안전밸브(5)의 설정압변환기와, 이 설정압변환기에 공급하는 전환신호를 제어하는 콘트로울러(19)등으로 이루어지는 유압회로의 제어장치에 있어서, 상기한 콘트로울러(19)는 토출압검출기(18)로부터 제1설정압신호를 입력한 다음 소정시간 후에, 설정압변환기에 제1설정압보다 높은 제2설정압설정신호를 출력하는 것을 특징으로 하는 유압회로의 자동순차 승압시스템.A variable displacement hydraulic pump 2 for driving an actuator, a capacity control device 8 of the hydraulic pump, a control pressure source of the capacity control device, a discharge pressure detector 18 of the hydraulic pump described above, and the discharge pressure The pressure of the above-mentioned control pressure source is reduced and supplied to the above capacity control device 8 so that the forging reduction function in which the amount of the hydraulic pump is basically determined with respect to the discharge pressure of the hydraulic pump detected by the detector 18 is reduced. A hop water torque manufacturing valve 10, a two-stage safety valve 5 for setting the maximum pressure of the hydraulic pump in two stages, a set pressure converter of the two-stage safety valve 5, and a set pressure converter. In the control apparatus of the hydraulic circuit which consists of a controller 19 etc. which control the switching signal to supply, the said controller 19 inputs a 1st set pressure signal from the discharge pressure detector 18, and then after a predetermined time. A second higher than the first set pressure to the set pressure transducer; An automatic sequential boosting system of a hydraulic circuit, characterized by outputting a set pressure setting signal. 액츄에이터를 구동하기 위한 가변용량형 유압펌프(2)와, 이 유압펌프의 용량제어장치(8)와 이 용량제어장치의 제어압원과 상기한 유압펌프의 토출압검출기(18)와, 소정의 흡수토오크신호에 있어서는, 이 토출압검출기(18)에 의하여 검출되는 유압펌프의 토출압에 대하여 유압펌프의 용량이 근본적으로 결정되는 제1의 홉수토오크곡선이 단조감소함수가 되고, 상기한 소정의 홉수토오크신호를 바꾸므로서, 유압펌프의 동일 토출압에 대하여 상기한 제1의 흡수토오크곡선에 있어서의 용량보다 소정량 작은 용량에서, 근본적으로 결정되는 제2의 흡수토오크곡선이 단조감소함수가 되도록, 상기한 제어압원의 원압을 감압하여 상기한 용량제어장치에 공급하는 흡수토오크 제어밸브(10)와, 상기한 유압펌프의 최고설정 압을 2단계로 설정하는 2단안전밸브(5)와, 이 2단안전밸브의 설정압변환기와 상기한 홉수토오크 제어밸브(10)의 솔레노이드(10a)와 2단안전밸브의 설정압변환기 등에 공급하는 변환신호를 제어하는 콘트로울러(19)로 이루어지는 유압회로의 제어장치에 있어서 상기한 콘트로울러는 토출압검출기(18)로부터 제1최고설정압이하의 압력신호를 입력했을 때, 상기한 제1의 흡수토오크곡선을 그리는 규정홉수토오크신호를 제2의 홉수토오크곡선을 그리는 감소흡수토오크신호로 바굼과 아을러, 제1설정'17의 압력신호를 입력했을 때, 소정시간 후에 이 콘트로을러(19)에서 설정압변환기에 제1설정압보다 높은 제2설정압 설정신호를 출력하는 것을 특징으로 하는 유압회로의 자동순차 승압시스템.A variable displacement hydraulic pump 2 for driving an actuator, a capacity control device 8 of the hydraulic pump, a control pressure source of the capacity control device, a discharge pressure detector 18 of the hydraulic pump described above, and a predetermined absorption In the torque signal, the first hop number torque curve in which the capacity of the hydraulic pump is essentially determined with respect to the discharge pressure of the hydraulic pump detected by the discharge pressure detector 18 becomes the monotonic reduction function, and the predetermined hop number is By changing the torque signal, the second absorption torque curve, which is basically determined at a capacity smaller than the capacity in the first absorption torque curve described above, with respect to the same discharge pressure of the hydraulic pump, becomes a monotonic reduction function. An absorption torque control valve 10 for reducing the source pressure of the control pressure source and supplying it to the capacity control device, and a two-stage safety valve 5 for setting the maximum set pressure of the hydraulic pump in two stages And a hydraulic pressure comprising a set pressure converter of the two-stage safety valve and a converter 19 for controlling a conversion signal supplied to the solenoid 10a of the hop water torque control valve 10 and the set pressure converter of the two-stage safety valve. In the controller of the circuit, when the controller receives a pressure signal of less than the first maximum set pressure from the discharge pressure detector 18, the controller returns a specified hop torque signal that draws the first absorption torque curve. When the pressure signal of the first setting '17 is inputted to the reduced absorption torque signal that draws the hop number torque curve, the controller 19 sets a higher pressure than the first set pressure to the set pressure converter after a predetermined time. 2. An automatic sequential boosting system of a hydraulic circuit, characterized by outputting a set pressure setting signal. 제3항에 있어서,상기한 감소홉수토오크신호를 해제하여 규정흡수토오크신호로 복귀시키기 위한 해제스위치와, 이 해제스위치에서의 해제신호를 상기한 콘트로울러가 입력하고 있는 동안, 이 콘트로울러에서 상기한 홉수토오크 제어밸브(10)의 솔레노이드(10a)에 감소흡수토오크신호를 해제하여 규정흡수토오크신호를 출력하는 것을 특징으로 하는 유압회로의 자동순차 승압시스템.4. The controller according to claim 3, wherein the release switch for releasing the reduced hop torque signal to return to the specified absorption torque signal and the release signal from the release switch are input by the controller. An automatic sequential boosting system of a hydraulic circuit, characterized in that to release a reduced absorption torque signal to a solenoid (10a) of one hop torque control valve (10) to output a specified absorption torque signal. 제2항에 있어서, 상기한 단조감소힘수는 유압펌프의 용량과 유압펌프의 토출압과의 곱이 일정한 것을 특징으로 하는 유압회로의 자동순차 승압시스템.The automatic sequential boosting system of a hydraulic circuit according to claim 2, wherein the forging reduction force is a product of a capacity of the hydraulic pump and a discharge pressure of the hydraulic pump. 제2항에 있어서, 상기한 2개의 단조감소함수는 유압펌프의 용량과 유압펌프의 토출압과의 곱이 일정한 것을 특징으로 하는 유압회로의 자동순타 승압시스템.The automatic booster boosting system of a hydraulic circuit according to claim 2, wherein the two forging reduction functions are a product of a capacity of a hydraulic pump and a discharge pressure of the hydraulic pump. 제2항에 있어서, 상기한 토출압검출기에 의하여 검출되는 유압펌프의 토출압에 대하여 유압펌프의 토출유량이 근본적으로 결정되는 마력고선이 단조감소함수가 되도록, 상기한 제어압원의 원압을 감압하여 상기한 용량제어장치(8)에 공급하는 것을 특징으로 하는 유압회로의 자동순차 승압시스템.The pressure of the above-mentioned control pressure source is reduced so that the horsepower solid state in which the discharge flow rate of the hydraulic pump is essentially determined with respect to the discharge pressure of the hydraulic pump detected by the discharge pressure detector is reduced. An automatic sequential boosting system of the hydraulic circuit, characterized in that the supply to the capacity control device (8). 제3항에 있어서, 상기한 유압펌프의 홉수토오크 제어밸브(10)의 솔레노이드(10a)로 공급하는 소정의 홉수토오크신호에 있어서는, 상기한 유압펌프의 토출압에 대하여, 토출유량이 근본적으로 결정되는 제1의 마력곡선이 단조감소함수가 되고, 상기한 소정의 홉수토오크신호를 바꿈므로서 유압펌프의 동일한 토출압에 대하여 상기한 제1의 마력곡선에 있어서의 토출유량보다 소정량 작은 토출유락에서, 근본적으로 결정되는 제2의 마력곡선이 단조감소함수가 되도록, 상기한 제어압원의 원압을 감압하여 상기한 용량제어장치(8)로 공급하는 것을 특징으로 하는 유압회로의 자동순차 승압시스템.4. A predetermined hop number torque signal supplied to the solenoid 10a of the hop number torque control valve 10 of the hydraulic pump according to claim 3, wherein the discharge flow rate is essentially determined with respect to the discharge pressure of the hydraulic pump. The first horsepower curve becomes a forging reduction function, and the discharge flow is lowered by a predetermined amount smaller than the discharge flow rate in the first horsepower curve described above for the same discharge pressure of the hydraulic pump by changing the predetermined hop number torque signal. In the main circuit of the hydraulic circuit, characterized in that the source pressure of the control pressure source is reduced and supplied to the capacity control device (8) so that the second horsepower curve which is basically determined is the monotonic reduction function. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임※ Note: The disclosure is based on the initial application.
KR1019940029188A 1993-11-12 1994-11-08 Automatic sequential boosting system of hydraulic circuit Expired - Fee Related KR0142899B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP05307254A JP3072818B2 (en) 1993-11-12 1993-11-12 Automatic sequential boosting system for hydraulic circuit
JP93-307254 1993-11-12

Publications (2)

Publication Number Publication Date
KR950014497A true KR950014497A (en) 1995-06-16
KR0142899B1 KR0142899B1 (en) 1998-09-15

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20000007997A (en) * 1998-07-09 2000-02-07 김형벽 Instant booster for wheel loader
KR100400971B1 (en) * 2000-12-14 2003-10-10 볼보 컨스트럭션 이키프먼트 홀딩 스웨덴 에이비 hydraulic circuit for heavy equipment of having two step port relief valve
JP4223893B2 (en) 2002-10-23 2009-02-12 株式会社小松製作所 Control method and control device for hydraulic pump for work machine of work vehicle
JP4884124B2 (en) * 2006-08-07 2012-02-29 住友建機株式会社 Hydraulic control circuit for construction machinery
KR100971526B1 (en) * 2007-12-28 2010-07-21 나부테스코 가부시키가이샤 Supply part of booster circuit of construction machinery, Booster circuit of construction machinery
JP5192367B2 (en) * 2008-12-26 2013-05-08 株式会社小松製作所 Work vehicle and control method of work vehicle
KR101369485B1 (en) * 2013-02-22 2014-03-03 대우조선해양 주식회사 Method for opening/closing a safety valve
KR101499902B1 (en) * 2014-06-10 2015-03-10 대우조선해양 주식회사 Marine structure with a regasification apparatus and method for operating an lng storage tank in the marine structure

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JP3072818B2 (en) 2000-08-07
JPH07139511A (en) 1995-05-30
KR0142899B1 (en) 1998-09-15

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