KR830003667A - Hydraulic Control System for Load Handling Hydraulic Motors - Google Patents

Hydraulic Control System for Load Handling Hydraulic Motors Download PDF

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Publication number
KR830003667A
KR830003667A KR1019800002925A KR800002925A KR830003667A KR 830003667 A KR830003667 A KR 830003667A KR 1019800002925 A KR1019800002925 A KR 1019800002925A KR 800002925 A KR800002925 A KR 800002925A KR 830003667 A KR830003667 A KR 830003667A
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KR
South Korea
Prior art keywords
fluid
pilot pressure
load
hydraulic
lift cylinder
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KR1019800002925A
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Korean (ko)
Inventor
토마스 스트리터 로버트
Original Assignee
로버트제이디닌
피아트-앨리스 컨스트럭숀 머시너리 인코오포레이티드
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Publication of KR830003667A publication Critical patent/KR830003667A/en

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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
    • E02F9/2203—Arrangements for controlling the attitude of actuators, e.g. speed, floating function
    • 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
    • F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
    • F15B11/12—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor providing distinct intermediate positions; with step-by-step action
    • 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
    • F15B11/003—Systems with load-holding valves
    • 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
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
    • F15B13/042—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure
    • F15B2013/0428—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure with switchable internal or external pilot pressure source
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/30505—Non-return valves, i.e. check valves
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/30505—Non-return valves, i.e. check valves
    • F15B2211/30515—Load holding valves
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/30525—Directional control valves, e.g. 4/3-directional control valve
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/31—Directional control characterised by the positions of the valve element
    • F15B2211/3105—Neutral or centre positions
    • F15B2211/3116—Neutral or centre positions the pump port being open in the centre position, e.g. so-called open centre
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/315—Directional control characterised by the connections of the valve or valves in the circuit
    • F15B2211/3157—Directional control characterised by the connections of the valve or valves in the circuit being connected to a pressure source, an output member and a return line
    • F15B2211/31588—Directional control characterised by the connections of the valve or valves in the circuit being connected to a pressure source, an output member and a return line having a single pressure source and multiple output members
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/32—Directional control characterised by the type of actuation
    • F15B2211/321—Directional control characterised by the type of actuation mechanically
    • F15B2211/324—Directional control characterised by the type of actuation mechanically manually, e.g. by using a lever or pedal
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/40—Flow control
    • F15B2211/405—Flow control characterised by the type of flow control means or valve
    • F15B2211/40507—Flow control characterised by the type of flow control means or valve with constant throttles or orifices
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/40—Flow control
    • F15B2211/415—Flow control characterised by the connections of the flow control means in the circuit
    • F15B2211/41527—Flow control characterised by the connections of the flow control means in the circuit being connected to an output member and a directional control valve
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/40—Flow control
    • F15B2211/42—Flow control characterised by the type of actuation
    • F15B2211/428—Flow control characterised by the type of actuation actuated by fluid pressure
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/40—Flow control
    • F15B2211/46—Control of flow in the return line, i.e. meter-out control
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/50—Pressure control
    • F15B2211/55—Pressure control for limiting a pressure up to a maximum pressure, e.g. by using a pressure relief valve
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/715—Output members, e.g. hydraulic motors or cylinders or control therefor having braking means
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/72—Output members, e.g. hydraulic motors or cylinders or control therefor having locking means
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/80—Other types of control related to particular problems or conditions
    • F15B2211/86—Control during or prevention of abnormal conditions
    • F15B2211/863—Control during or prevention of abnormal conditions the abnormal condition being a hydraulic or pneumatic failure
    • F15B2211/8636—Circuit failure, e.g. valve or hose failure

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

Abstract

내용 없음No content

Description

하중 취급 유압모우터를 위한 유압 제어시스템Hydraulic Control System for Load Handling Hydraulic Motors

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

제 1 도는 본 발명에 따른 유압 제어시스템을 사용하는 모우터휠로우더의 사시도.1 is a perspective view of a motor wheel loader using a hydraulic control system according to the present invention.

제 2 도는 본 발명에 따른 유압 제어시스템의 한 실시 예의 개략도.2 is a schematic view of one embodiment of a hydraulic control system according to the present invention.

제 3 도는 본 발명에 따른 유압 제어시스템의 다른 실시예의 개략도.3 is a schematic view of another embodiment of a hydraulic control system according to the present invention.

Claims (11)

한쌍의 유압 리프트시린더가 각각 하중 상승통과 하중 하강통을 지니고, 상기의 리프트 시린더를 위한 유압 제어시스템이 유체압력을 평형시키는 상기의 리프트 시린더의 하중상승통 사이에 연결되는 평형도관을 지니며, 상기의 평형도관이 상기의 오리피스 사이의 평형도관의 유체압력의 손실을 야기시키는 상기의 하중 상승통으로부터 유체흐름을 제한하기 위한 각각의 리프트 시린더의 한쌍의 간격져 분리된 흐름 제한 오리피스를 지니게 구성된 하중 취급 장치.A pair of hydraulic lift cylinders each have a load riser and a load dropper, and a hydraulic control system for the lift cylinder has a balance conduit connected between the load riser of the lift cylinder to balance the fluid pressure. And a pair of spaced apart flow restriction orifices of each lift cylinder for restricting the flow of fluid from the load riser causing the loss of fluid pressure in the balance conduit between the orifices. Load-bearing device. 한 쌍의 유압 리프트시린더가 가압된 유압유체와 유체 연결되게 하중 상승통과 하중 하강통을 지니고 유압 유체 방향 제어밸브가 상기의 리프트 시린더를 작동시키기 위한 상기의 하중 상승 및 하중하강통으로의 가압된 유압유체의 통로를 제어하며, 한쌍의 파일럿 압력 작동 지지밸브가 상기의 리프트 시린더의 하중상승통으로부터 상기의 저장통으로의 유체흐름을 제어하기 위해 유압유체의 저장통과 상기 하중 상승통 사이에 위치하고 파일럿 압력 제어 밸브가 상기의 파일럿 압력 작동 지지밸브를 작동시키기 위해 파일럿 압력의 사용을 제어하는 상기의 파일럿 압력 작동 지지밸브에 작동되게 연결되며 평형도 관이 유체 유압을 평형시키는 리프트 시린더의 상기의 하중 상승통 사이에 연결되고, 압력감소기가 상기 파일럿 압력 제어밸브가 작동되면 상기의 하중 상승통 속의 유체 압력조건의 상응하여 상기의 파일럿 압력작동 지지밸브의 작동을 실행시키는 상기의 파일럿 압력 제어밸브와 각각의 상기의 하중 상승통 사이에 연결되게 구성된 하중 취급장치를 위한 유압 제어시스템.A pair of hydraulic lift cylinders have a load riser and a load dropper in fluid connection with the pressurized hydraulic fluid, and a hydraulic fluid direction control valve is pressurized into the load riser and load dropper for operating the lift cylinder. Controls the passage of the hydraulic fluid, a pair of pilot pressure actuated support valves are located between the reservoir and the load riser of the hydraulic fluid to control the flow of fluid from the lift cylinder of the lift cylinder to the reservoir. The above load of the lift cylinder in which a pressure control valve is operatively connected to the pilot pressure actuated support valve which controls the use of pilot pressure to actuate the pilot pressure actuated support valve and the balance tube balances fluid hydraulic pressure. The pilot pressure control valve is actuated between the risers and a pressure reducer Hydraulic pressure for the load handling device configured to be connected between the pilot pressure control valve and each of the load riser to execute the operation of the pilot pressure actuated support valve in accordance with the fluid pressure condition in the load riser above. Control system. 상기의 평형도관이 상기의 오리피스 사이의 평형도 관속의 유체 압력의 손실을 야기시키는 상기의 하중 상승통으로 부터의 유체흐름을 제한하기 위한 한쌍의 간겨져 떨어진 흐름, 제한 오리피스를 지니는 청구범위 2의 장치.Apparatus of claim 2 in which said balanced conduit has a pair of interleaved flow, restriction orifices for restricting fluid flow from said load riser resulting in a loss of fluid pressure in the balance tube between said orifices. . 상기의 방향 제어밸브와 상기의 파일럿 압력 제어밸브를 동시에 작동시키기 위한 장치를 지니는 청구범위 2의 장치.Apparatus according to claim 2 having a device for simultaneously operating said directional control valve and said pilot pressure control valve. 상기의 압력감소기가 상기의 리프트시린더의 상기의 하중 상승통으로부터 유체흐름을 행하기 위해 상기의 파일럿 압력 작동 지지밸브를 횡단하는 유체 압력강하를 제공하도록 각각의 리프트 시린더를 위한 하나의 오리피스를 지닌 상기의 유체 저장통의 배출도관속에 연결된 한쌍의 간격져 떨어진 흐름 제한 오리피스를 지니는 청구범위 4의 장치.One orifice for each lift cylinder is provided such that the pressure reducer provides a fluid pressure drop across the pilot pressure actuated support valve to effect fluid flow from the load riser of the lift cylinder. The device of claim 4 having a pair of spaced apart flow restriction orifices connected to an outlet conduit of said fluid reservoir. 한쌍의 유압 리프트 시린더가 가압된 유압유체의 저장소와 유체 연결되는 하중 상승통과 하중 하강통을 지니며, 다수의 위치 방향제어밸브가 상기의 리프트 시린더를 작동시키기 위한 상기의 하중 상승 및 하중 하강통으로의 가압된 유압 유체의 통로를 제어하고, 한쌍의 보통 폐쇄된 파일럿 압력 작동 지지 밸브가 상기의 리프트 시린더의 상기 상승통으로부터의 가압된 유압 유체의 흐름을 제어하도록 상기의 하중 상승통에 작동되게 연결되며 보통 폐쇄된 파일럿 압력 제어 밸브가 그 작동을 제어하도록 상기의 파일럿 압력 작동 지지밸브에 작동되게 연결되고, 상기의 파일럿 압력 제어밸브를 개방시켜 상기의 다수의 위치 방향 제어 밸브가 상기의 리프트 시린더의 하중 하강통에 가압된 유압유체를 공급하도록 위치시킬 때 상기의 보통 폐쇄된 파일럿 압력 작동 지지밸브를 개방시키도록 장치가 작동 가능하며, 평형 도관이 압력을 평형되도록 하기 위해 상기의 리프트 시린더의 상기의 하중 상승통 사이의 유체연결에 연결되고, 가압된 유압유체 배출라인이 상기 파일럿 압력 제어밸브가 개방되면 상기의 파일럿 압력 작동지지 밸브를 개방시키도록 상기의 보통 폐쇄된 파일럿 압력작동 지지밸브와 상기의 보통 폐쇄된 파일럿 압력 제어밸브 사이에 연결되게 구성된 하중취급 장치를 위한 유압 제어시스템.A pair of hydraulic lift cylinders have a load riser and a load dropper in fluid connection with a reservoir of pressurized hydraulic fluid, and a plurality of position control valves are used for the load lift and load drop to operate the lift cylinder. Control the passage of pressurized hydraulic fluid to the keg, and a pair of normally closed pilot pressure actuated support valves actuate the load riser to control the flow of pressurized hydraulic fluid from the lift cylinder of the lift cylinder The pilot pressure control valve is operably connected to the pilot pressure control support valve so that the pilot pressure control valve is normally closed and the pilot pressure control valve is controlled. The above normally closed waves when positioned to supply pressurized hydraulic fluid to the load down barrel of the cylinder A device is operable to open the let pressure actuated support valve, connected to the fluid connection between the load riser of the lift cylinder to balance the pressure, and pressurized hydraulic fluid discharge line. Hydraulic pressure for the load handling device configured to be connected between the normally closed pilot pressure operated support valve and the normally closed pilot pressure control valve to open the pilot pressure actuated support valve when the pilot pressure control valve is opened. Control system. 한쌍의 이중작동 유압 리프트시린더가 하중상승통과 하중 하강통을 지니고, 이러한 통이 가압된 유압 유체의 저장소, 가압된 유체의 저장소 및 유압유체를 위한 저장소와 유체연결되게 그 속에 형성된 유체포오트를 지니며, 다수위치 방향 제어밸브가 상기의 리프트 시린더를 작동시키고 적어도 중간, 하강 및 상승 위치를 지니고 상기의 가압된 유압유체의 저장소와 상기의 유압유체 저장소와 유체 연결되고, 1차 및 2차의 가압된 유압 유체라인이 상기의 다수의 위치 방향 제어밸브와 유체연결되며, 상기의 1차의 가압된 유압유체라인이 상기의 이중작동 유압 리프트시린더의 상기의 하중하강통의 유체 포오트에 연결되고, 한쌍의 보통 폐쇄된 파일럿 압력 작동 지지밸브가 유체 흐름을 제어하도록 상기의 이중작동 유압 리프트 시린더의 상기의 하중상승통의 유체포오트와 유체 연결되게 연결되고, 각각의 파일럿 압력 작동 지지밸브는 상기의 하중상승통의 유체 포오트와 상기의 2차 가압된 유압 유체라인 사이에 삽입되며 상기의 파일럿 압력 포오트의 파일럿 압력조건에 상응해 파일럿 압력 작동 지지밸브를 개방시키도록 파일럿 압력포오트를 지니고, 파일럿 압력제어밸브가 그 작동을 수행하기 위해 상기의 파일럿 압력 작동 지지밸브의 각각에 유체 연결되며, 작동장치가 상기의 다수의 위치 방향 제어밸브가 중간에 있을 때 상기의 파일럿 압력제어밸브를 폐쇄 시키고 상기의 다수의 위치 방향 제어밸브가 상기의 하강 위치에 있으면 상기의 파일럿 압력제어밸브를 개방시키도록 상기의 다수의 위치 방향 제어밸브와 상기의 파일럿 압력제어밸브를 작동시키고, 평형 도관이 압력을 평형하게 하도록 상기의 이중 작동 유압 리프트 시린더의 상기의 상승통이 유압 포오트사이에 유체 연결되며, 한상의 간격져 떨어진 흐름 제한 오리피스가 상기의 하중상승통으로부터 유체흐름을 제한하기 위해 상기의 평형 도관속에 위치되고 파일럿 압력라인이 상기의 파일럿 압력라인을 통하여 유체가 흐르면 상기의 보통 폐쇄된 파일럿 압력자동 지지밸브를 개방시키도록 상기의 유압 유체 저장소와 상기의 파일럿 압력포오트 사이에 연결되게 구성된 하중 취급장치를 위한 유압 제어시스템.A pair of dual-acting hydraulic lift cylinders have a lift barrel and a load lower barrel, and these barrels form a fluid port formed therein in fluid connection with a reservoir of pressurized hydraulic fluid, a reservoir of pressurized fluid and a reservoir for hydraulic fluid. And a multi-position directional control valve actuates the lift cylinder and is in fluid connection with the reservoir of pressurized hydraulic fluid and the hydraulic fluid reservoir, having at least intermediate, lower and raised positions. A pressurized hydraulic fluid line of is in fluid communication with the plurality of positional directional control valves, wherein the primary pressurized hydraulic fluid line is connected to the fluid port of the load-down barrel of the dual-acting hydraulic lift cylinder. Said load of said dual acting hydraulic lift cylinder being connected, such that a pair of normally closed pilot pressure actuated support valves control fluid flow. Connected in fluid communication with the fluid port of the upcoming passage, each pilot pressure actuated support valve is inserted between the fluid port of the load riser and the secondary pressurized hydraulic fluid line and Having a pilot pressure port to open the pilot pressure actuated support valve in accordance with the pilot pressure condition, the pilot pressure control valve being fluidly connected to each of the pilot pressure actuated support valves to perform the actuation; Closing the pilot pressure control valve when the plurality of position direction control valves are in the middle, and opening the pilot pressure control valve when the plurality of position direction control valves are in the lowered position. Position control valve and the pilot pressure control valve above, and the balanced conduits The lift cylinder of the dual actuated hydraulic lift cylinder is fluidly connected between the hydraulic ports and a flow restricting orifice spaced apart from one phase is placed in the balance conduit to limit fluid flow from the load riser. A load handling device positioned and connected between the hydraulic fluid reservoir and the pilot pressure port to open the normally closed pilot pressure auto support valve when fluid flows through the pilot pressure line. Hydraulic control system for 한쌍의 체크 밸브가 상기의 상승통의 2차 유체라인과 유체포오트 사이에 삽입되고 상기의 2차 유체라인으로 부터 상기의 상승통으로 유체가 흐르도록 연결되어 있는 청구범위 7의 유압 제어시스템.7. A hydraulic control system according to claim 7, wherein a pair of check valves are inserted between the secondary fluid line and the fluid port of the riser and are connected to allow fluid to flow from the secondary fluid line to the riser. 상기의 다수의 위치 방향 제어밸브가 파일럿 압력에 의해서 작동되고 상기의 다수의 위치방향 제어밸브와 상기의 지지밸브의 파일럿 압력 포오트로 상기 보조펌프로부터 파일럿 압력을 향하게 하는 선택적 작동 가능한 제어밸브와 파일럿 압력을 공급하기 위한 보조펌프를 지니는 청구범위 7의 유압 제어시스템.Wherein said plurality of position direction control valves are actuated by pilot pressure and selectively actuated control valves and pilots to direct pilot pressure from said auxiliary pump to pilot pressure ports of said plurality of position direction control valves and said support valves. Hydraulic control system of claim 7 having an auxiliary pump for supplying pressure. 한쌍의 이중작동 유압 리프트시린더가 하중 상승통과 하중 하강통을 지니고 이러한통이 가압된 유압 유체의 저장소, 가압유체의 저장소 및 유압유체의 저장소와 유체 연결되게 그속에 형성된 유체 파일럿을 지니며 다수의 위치 방향 제어밸브가 적어도 중간, 하강 및 상승 위치를 지니고 상기의 리프트 시린더를 작동시키며 유압유체를 위한 상기 저장소와 가압된 유압유체의 저장소와 유체 연결되고, 1차 및 2차 가압된 유압유체 라인이 상기의 다수의 위치 방향 제어밸브와 유체 연결되게 연결되며, 상기의 1차 가압된 유압유체 라인이 상기의 이중작동 유압리프트 시린더의 상기의 하중 하강통의 유체포오트에 연결되고, 한쌍의 보통 폐쇄된 파일럿 압력작동 지지밸브가 유체흐름을 제어하도록 상기의 이중 작동 유압리프트 시린더의 상기의 하중상승통의 유체 포오트와 유체연결되게 연결되며 상기의 2차 가압된 유압 유체라인과 상기의 하중 상승통의 유체 포오트사이에 삽입되고, 파일럿 압력 제어밸브가 그 작동을 수행하기 위해 상기의 파일럿 압력 작동 지지 밸브의 각각에 유체 연결되며, 작동장치가 상기의 다수의 위치 방향 제어밸브와 상기의 파일럿 압력 작동 지지밸브를 작동시키도록 상기 파일럿 압력을 향하게 하기 위한 제어밸브와 파일럿 압력을 공급하기 위한 보조 펌프를 지니어 상기 파일럿 압력 작동 지지밸브가 상기의 다수의 위치 방향 제어밸브가 중간에 위치되면 폐쇄되고 상기의 파일럿 압력작동 지지밸브가 상기의 다수의 위치 방향 제어밸브가 하강위치에 있으면 개방되며, 평형도관이 압력을 평형되게 하도록 상기의 이중작동 리프트 시린더의 상기 상승통의 상기 유체포오트사이에 유체 연결되고, 한쌍의 간격져 떨어진 흐름 제한 오리피스가 상기의 하중상승통으로부터의 유체흐름을 제한시키기 위한 상기의 평형도관 속에 위치되며, 파일럿 압력도관이 상기의 보조펌프로부터 압력의 파괴를 야기시키는 상기의 지지밸브를 작동시키도록 파일럿 압력을 공급하는 상기의 파일럿 제어밸브에 작동되게 연결된 그 다른 단부를 지니고 상기의 파일럿 압력 작동지지밸브의 각각의 파일럿 압력포오트에 연결된 한 단부를 지니게 구성된 하중 취급장치를 위한 유압 제어시스템.A pair of double acting hydraulic lift cylinders have a load riser and a load dropper, which have a fluid pilot formed therein in fluid connection with a reservoir of pressurized hydraulic fluid, a reservoir of pressurized fluid and a reservoir of hydraulic fluid. A position direction control valve operates the lift cylinder at least in the intermediate, lowering and rising positions and is in fluid communication with the reservoir for hydraulic fluid and the reservoir of pressurized hydraulic fluid, and the primary and secondary pressurized hydraulic fluid lines. A plurality of positional directional control valves are connected in fluid communication with the primary pressurized hydraulic fluid line connected to the fluid port of the load down barrel of the dual actuated hydraulic lift cylinder; The above rise in load of the dual acting hydraulic lift cylinder such that a normally closed pilot pressure actuated support valve controls the fluid flow. Fluidly connected with the fluid port of the keg and inserted between the secondary pressurized hydraulic fluid line and the fluid port of the load riser, the pilot pressure control valve being operated to perform the operation. Fluidly connected to each of the actuating support valves, the actuating device being adapted to supply a control valve and pilot pressure for directing the pilot pressure to actuate the plurality of positional control valves and the pilot pressure actuating support valve. The pump is closed and the pilot pressure actuated support valve is closed when the plurality of position direction control valves are located in the middle and the pilot pressure actuated support valve is opened when the plurality of position direction control valves are in the down position, The fluid trap in the riser of the dual acting lift cylinder to balance the pressure conduit A fluid connection between the valves and a pair of spaced apart flow restriction orifices is placed in the balance conduit to limit fluid flow from the load riser, and a pilot pressure conduit prevents pressure breakdown from the auxiliary pump. Having one end connected to each pilot pressure port of said pilot pressure actuated support valve and having its other end operatively connected to said pilot control valve for supplying pilot pressure to actuate said support valve. Hydraulic control system for load handling devices. 상기의 파일럿 제어밸브가 상기의 다수의 위치 방향 제어밸브를 통하여 상기의 파일럿 압력 작동 지지밸브에 파일럿 압력을 공급하도록 작동되는 청구범위 10의 유압 제어시스템.10. The hydraulic control system of claim 10, wherein the pilot control valve is operated to supply pilot pressure to the pilot pressure actuated support valve through the plurality of position direction control valves. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019800002925A 1979-07-26 1980-07-23 Hydraulic Control System for Load Handling Hydraulic Motors KR830003667A (en)

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US60,773 1979-07-26

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JPS6258599A (en) * 1985-09-06 1987-03-14 株式会社　湘南工作所 Remote wireless operated flood lighting apparatus
DE3800188A1 (en) * 1988-01-07 1989-07-20 Danfoss As HYDRAULIC SAFETY BRAKE VALVE ARRANGEMENT
JPH02140336A (en) * 1988-11-21 1990-05-30 Mitsui Eng & Shipbuild Co Ltd Driving circuit for vehicle in right/left independent hydraulic traveling motor drive system
JPH10169805A (en) * 1996-12-05 1998-06-26 Smc Corp Pilot changeover valve
DE202009006299U1 (en) * 2009-04-29 2010-09-09 Liebherr-France Sas, Colmar Hydraulic system as well as mobile construction machine

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SE8005276L (en) 1981-01-27
IT1131979B (en) 1986-06-25
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