SE542192C2 - Open center hydraulic system - Google Patents

Open center hydraulic system

Info

Publication number
SE542192C2
SE542192C2 SE1750923A SE1750923A SE542192C2 SE 542192 C2 SE542192 C2 SE 542192C2 SE 1750923 A SE1750923 A SE 1750923A SE 1750923 A SE1750923 A SE 1750923A SE 542192 C2 SE542192 C2 SE 542192C2
Authority
SE
Sweden
Prior art keywords
opening area
control signal
open center
area value
hydraulic system
Prior art date
Application number
SE1750923A
Other versions
SE1750923A1 (en
Inventor
Bertil Lundgren
Original Assignee
Nordhydraulic Ab
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 Nordhydraulic Ab filed Critical Nordhydraulic Ab
Priority to SE1750923A priority Critical patent/SE542192C2/en
Priority to US16/629,610 priority patent/US11168464B2/en
Priority to US16/630,095 priority patent/US11408147B2/en
Priority to EP18739519.9A priority patent/EP3652443B1/en
Priority to EP18739520.7A priority patent/EP3652444B1/en
Priority to KR1020207000885A priority patent/KR102617522B1/en
Priority to KR1020207000884A priority patent/KR102601299B1/en
Priority to PCT/EP2018/068544 priority patent/WO2019011859A2/en
Priority to JP2019571342A priority patent/JP7219725B2/en
Priority to JP2019571340A priority patent/JP2020526713A/en
Priority to PCT/EP2018/068545 priority patent/WO2019011860A1/en
Priority to CN201890000906.5U priority patent/CN212250642U/en
Priority to CN201890000876.8U priority patent/CN211525208U/en
Publication of SE1750923A1 publication Critical patent/SE1750923A1/en
Publication of SE542192C2 publication Critical patent/SE542192C2/en
Priority to JP2023094133A priority patent/JP2023130346A/en

Links

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
    • E02F9/2221—Control of flow rate; Load sensing arrangements
    • E02F9/2225—Control of flow rate; Load sensing arrangements using pressure-compensating valves
    • E02F9/2228—Control of flow rate; Load sensing arrangements using pressure-compensating valves including an electronic controller
    • 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
    • E02F9/2264—Arrangements or adaptations of elements for hydraulic drives
    • E02F9/2267—Valves or distributors
    • 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
    • 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
    • F15B13/0401—Valve members; Fluid interconnections therefor
    • F15B13/0402—Valve members; Fluid interconnections therefor for linearly sliding valves, e.g. spool 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
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205—Systems with pumps
    • F15B2211/2053—Type of pump
    • F15B2211/20538—Type of pump constant capacity
    • 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
    • F15B2211/45—Control of bleed-off flow, e.g. control of bypass flow to the return line
    • 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
    • F15B2211/515—Pressure control characterised by the connections of the pressure control means in the circuit
    • F15B2211/5157—Pressure control characterised by the connections of the pressure control means in the circuit being connected to a pressure source and a return line
    • 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
    • F15B2211/78—Control of multiple output members
    • F15B2211/782—Concurrent control, e.g. synchronisation of two or more actuators

Landscapes

  • 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)

Abstract

The present invention relates to An open center hydraulic system (100), the open center hydraulic system (100) comprising a tank configured to hold hydraulic fluid, a pump configured to provide pressurized hydraulic fluid from the tank, a shunt valve configured to adapt an first opening area between a first input port and a first output port of the shunt valve dependent on a first control signal, wherein the first input port is coupled to the pump and the first output port is coupled to the tank, a first actuator valve coupled to the first input port and configured to adapt a second opening area of the first actuator valve dependent on a second control signal, a hydraulic valve control unit configured to determine a first opening area value and a second opening area value based on user input data and a predetermined relation dependent on the user input data, sending the first control signal, indicative of the first opening area value and sending the second control signal indicative of the second opening area value.
SE1750923A 2017-07-14 2017-07-14 Open center hydraulic system SE542192C2 (en)

Priority Applications (14)

Application Number Priority Date Filing Date Title
SE1750923A SE542192C2 (en) 2017-07-14 2017-07-14 Open center hydraulic system
PCT/EP2018/068544 WO2019011859A2 (en) 2017-07-14 2018-07-09 Open center hydraulic system and valve
JP2019571342A JP7219725B2 (en) 2017-07-14 2018-07-09 Open center hydraulic system and valves
EP18739519.9A EP3652443B1 (en) 2017-07-14 2018-07-09 Open center hydraulic system
EP18739520.7A EP3652444B1 (en) 2017-07-14 2018-07-09 Dynamic open center hydraulic system control
KR1020207000885A KR102617522B1 (en) 2017-07-14 2018-07-09 Dynamic open center hydraulic system control
KR1020207000884A KR102601299B1 (en) 2017-07-14 2018-07-09 Open-center hydraulic systems and valves
US16/629,610 US11168464B2 (en) 2017-07-14 2018-07-09 Open center hydraulic system and valve
US16/630,095 US11408147B2 (en) 2017-07-14 2018-07-09 Dynamic open center hydraulic system control
JP2019571340A JP2020526713A (en) 2017-07-14 2018-07-09 Dynamic open center hydraulic system control
PCT/EP2018/068545 WO2019011860A1 (en) 2017-07-14 2018-07-09 Dynamic open center hydraulic system control
CN201890000906.5U CN212250642U (en) 2017-07-14 2018-07-09 Hydraulic valve control unit
CN201890000876.8U CN211525208U (en) 2017-07-14 2018-07-09 Open-center hydraulic system and valve
JP2023094133A JP2023130346A (en) 2017-07-14 2023-06-07 Dynamic open center hydraulic system control

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE1750923A SE542192C2 (en) 2017-07-14 2017-07-14 Open center hydraulic system

Publications (2)

Publication Number Publication Date
SE1750923A1 SE1750923A1 (en) 2019-01-15
SE542192C2 true SE542192C2 (en) 2020-03-10

Family

ID=65270438

Family Applications (1)

Application Number Title Priority Date Filing Date
SE1750923A SE542192C2 (en) 2017-07-14 2017-07-14 Open center hydraulic system

Country Status (1)

Country Link
SE (1) SE542192C2 (en)

Also Published As

Publication number Publication date
SE1750923A1 (en) 2019-01-15

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