KR950019257A - Variable differential pressure control - Google Patents

Variable differential pressure control Download PDF

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Publication number
KR950019257A
KR950019257A KR1019930030391A KR930030391A KR950019257A KR 950019257 A KR950019257 A KR 950019257A KR 1019930030391 A KR1019930030391 A KR 1019930030391A KR 930030391 A KR930030391 A KR 930030391A KR 950019257 A KR950019257 A KR 950019257A
Authority
KR
South Korea
Prior art keywords
differential pressure
pressure
pump
hydraulic
variable
Prior art date
Application number
KR1019930030391A
Other languages
Korean (ko)
Other versions
KR970000244B1 (en
Inventor
문영철
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 KR1019930030391A priority Critical patent/KR970000244B1/en
Publication of KR950019257A publication Critical patent/KR950019257A/en
Application granted granted Critical
Publication of KR970000244B1 publication Critical patent/KR970000244B1/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
    • F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member

Abstract

본 발명에 따라 조절레버의 작동에 의해 파이로트 밸브의 스풀(6)이 변위되면 작동기와 펌프(1)사이의 차압이 변화하여 유압이 작동기로 공급되어 작동기를 구동하게 되고, 상기 차압은 제어기(3)에 의해 측정되며, 상기 제어기(3)에 비례제어 감압밸브(8)로부터 공급되는 부가적인 유압을 인가하여 제어기(3)에 의하여 측정되는 차압을 감소시켜 작동기의 제어성을 향상시킨 유압장치 가변차압 제어장치가 제공된다.According to the present invention, when the spool 6 of the pilot valve is displaced by the operation of the control lever, the pressure difference between the actuator and the pump 1 is changed so that the hydraulic pressure is supplied to the actuator to drive the actuator. A hydraulic device measured by 3) and applying an additional hydraulic pressure supplied from the proportional control pressure reducing valve 8 to the controller 3 to reduce the differential pressure measured by the controller 3 to improve the controllability of the actuator. A variable differential pressure control device is provided.

Description

가변차압 제어장치Variable differential pressure control

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

제1도는 종래기술에 따른 차압제어장치의 유압회로의 선도.1 is a diagram of a hydraulic circuit of a differential pressure control apparatus according to the prior art.

제2도는 본 발명에 따른 가변차압 제어장치의 유압회로의 선도.2 is a diagram of a hydraulic circuit of a variable differential pressure control device according to the present invention.

Claims (3)

압유를 제공하는 가변용량식 유압펌프와, 조종실의 레버의 작동에 의해 동작되는 파이로트밸브, 상기 펌프로부터 상기 파이포트밸브의 스풀을 통하여 유압을 공급받는 작동기, 및 상기 펌프로부터 공급되는 유압 및 상기 작동기의 유압의 차압에 따라 펌프의 서보피스톤을 매개로 토출량을 조절하도록된 부하감지 제어기로 구성되는 중장비용 유압제어장치에 있어서, 상기 부하감지 제어기에서 작동기의 부하압력이 작용하는 반대쪽에 파이로트 피스톤이 설치되고, 이 파이로트 피스톤의 수압실에는 펌프로부터 토출되는 유압에 부가하여 상기 부하감지 제어지에 가변적인 유압을 제공하여 부하감지 제어기에 의해 유지되는 차압이 감소되도록하는 차압가변수단이 연결 구성되는 것을 특징으로 하는 중장비용 유압장치의 가변차압제어 장치.A variable displacement hydraulic pump for providing pressure oil, a pilot valve operated by operation of a lever of a cockpit, an actuator supplied with hydraulic pressure from the pump through the spool of the pipe valve, and the hydraulic pressure supplied from the pump A heavy duty hydraulic control device comprising a load sensing controller configured to adjust a discharge amount through a servo piston of a pump in accordance with a differential pressure of a hydraulic pressure of an actuator, wherein a pilot piston on the opposite side of the load sensing controller acts on a load pressure of the actuator. And a differential pressure variable stage is connected to the hydraulic pressure chamber of the pilot piston to provide a variable hydraulic pressure to the load sensing control paper in addition to the hydraulic pressure discharged from the pump so that the differential pressure maintained by the load sensing controller is reduced. Variable differential pressure control device of the hydraulic device for heavy equipment, characterized in that. 제1항에 있어서, 상기 차압가변수단은, 솔레노이드 밸브와 전자비례제어 감압밸브중 어느 하나인 것을 특징으로 하는 중장비용 유압장치의 가변차압제어 장치.The variable differential pressure control device of claim 1, wherein the differential pressure variable stage is any one of a solenoid valve and an electromagnetic proportional control pressure reducing valve. 제1항에 있어서, 상기 제어기로부터 측정된 차압이 상기 펌프에 연결된 서보피스톤에 공급되어 서보피스톤의 이동에 의하여 상기 펌프의 토출량이 조절되는 것을 특징으로 하는 중장비용 유압장치의 가변차압제어장치.The variable differential pressure control device of claim 1, wherein the differential pressure measured by the controller is supplied to a servo piston connected to the pump to adjust the discharge amount of the pump by the movement of the servo piston. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019930030391A 1993-12-28 1993-12-28 Variable pressure difference control device KR970000244B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019930030391A KR970000244B1 (en) 1993-12-28 1993-12-28 Variable pressure difference control device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019930030391A KR970000244B1 (en) 1993-12-28 1993-12-28 Variable pressure difference control device

Publications (2)

Publication Number Publication Date
KR950019257A true KR950019257A (en) 1995-07-22
KR970000244B1 KR970000244B1 (en) 1997-01-08

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ID=19373394

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019930030391A KR970000244B1 (en) 1993-12-28 1993-12-28 Variable pressure difference control device

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KR (1) KR970000244B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100438928B1 (en) * 2001-08-17 2004-07-03 현대중공업 주식회사 Hydraulic control appratus for fine control of an excavator

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100438928B1 (en) * 2001-08-17 2004-07-03 현대중공업 주식회사 Hydraulic control appratus for fine control of an excavator

Also Published As

Publication number Publication date
KR970000244B1 (en) 1997-01-08

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