HYDRAULIC SYSTEM FOR CONSTRUCTION MACHINE

• Main Authors: KIM, Tae Hoon, KANG, Sang Seok, KO, Jinwoo
• Format: Patent
• Language: English; French; Korean
• Published: 15.08.2024
• Subjects: BLASTING; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR; DREDGING; FIXED CONSTRUCTIONS; FLUID-PRESSURE ACTUATORS; FLUID-PRESSURE ACTUATORS, e.g. SERVO-MOTORS; FOUNDATIONS; HEATING; HYDRAULIC ENGINEERING; HYDRAULICS OR PNEUMATICS IN GENERAL; LIGHTING; MECHANICAL ENGINEERING; SOIL SHIFTING; SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; WEAPONS

One aspect of the present disclosure provides a hydraulic system for a construction machine, comprising: a traveling straight spool, comprising: first and second hydraulic pumps; first and second traveling motors operable by hydraulic fluid discharged from the first and second hydraulic pumps; a front work device operable by hydraulic fluid discharged from the first and second hydraulic pumps; a first section wherein, during traveling single operation, hydraulic fluid discharged from the first hydraulic pump is supplied to the first traveling motor, and hydraulic fluid discharged from the second hydraulic pump is supplied to the second traveling motor; and a second section wherein, during traveling combined operation, hydraulic fluid discharged from the first hydraulic pump is supplied to the first and second traveling motors, and hydraulic fluid discharged from the second hydraulic pump is supplied to the front work device; and a control unit which controls the supply flow rate of the first and second hydraulic pumps to change gradually in accordance with a section change rate during section change of the traveling straight spool. Un aspect de la présente invention concerne un système hydraulique pour un engin de chantier, comprenant : un tiroir droit de déplacement, comprenant : des première et seconde pompes hydrauliques; des premier et second moteurs de déplacement pouvant être actionnés par un fluide hydraulique refoulé par les première et seconde pompes hydrauliques; un dispositif de travail avant pouvant être actionné par un fluide hydraulique refoulé par les première et seconde pompes hydrauliques; une première section dans laquelle, pendant un fonctionnement simple de déplacement, un fluide hydraulique refoulé par la première pompe hydraulique est fourni au premier moteur de déplacement, et un fluide hydraulique refoulé par la seconde pompe hydraulique est fourni au second moteur de déplacement; et une seconde section dans laquelle, pendant un fonctionnement combiné de déplacement, le fluide hydraulique refoulé par la première pompe hydraulique est fourni aux premier et second moteurs de déplacement, et le fluide hydraulique refoulé par la seconde pompe hydraulique est fourni au dispositif de travail avant; et une unité de commande qui commande le débit d'alimentation des première et seconde pompes hydrauliques de sorte qu'il change progressivement en fonction d'une vitesse de changement de section pendant le changement de section du tiroir droit de déplacement. 본 개시 내용의 일 측면은 제1, 2유압 펌프, 상기 제1, 2 유압 펌프로부터 토출된 작동유에 의해 동작 가능한 제1, 2 주행 모터, 상기 제1, 2 유압 펌프로부터 토출된 작동유에 의해 동작 가능한 프론트작업장치, 주행단독동작시 상기 제 1 유압 펌프로부터 토출된 작동유가 상기 제 1 주행 모터에 공급되며 상기 제 2 유압 펌프로부터 토출된 작동유가 상기 제 2 주행 모터에 공급되는 제 1 섹션, 및 주행복합동작시 상기 제 1 유압 펌프로부터 토출된 작동유가 상기 제 1, 2 주행 모터에 공급되며 상기 제 2 유압 펌프로부터 토출된 작동유가 상기 프론트작업장치에 공급되는 제 2 섹션을 포함하는 주행직진스풀 및 상기 주행직진스풀의 섹션 절환시 섹션 절환율에 따라 상기 제 1, 2 유압 펌프의 공급 유량이 점진적으로 변경되도록 제어하는 제어부를 포함하는, 건설기계의 유압 시스템을 제공한다.