JPH0319402B2 - - Google Patents

Info

Publication number
JPH0319402B2
JPH0319402B2 JP58151501A JP15150183A JPH0319402B2 JP H0319402 B2 JPH0319402 B2 JP H0319402B2 JP 58151501 A JP58151501 A JP 58151501A JP 15150183 A JP15150183 A JP 15150183A JP H0319402 B2 JPH0319402 B2 JP H0319402B2
Authority
JP
Japan
Prior art keywords
hydraulic
variable hydraulic
hydraulic pump
variable
oil cooler
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Lifetime
Application number
JP58151501A
Other languages
English (en)
Japanese (ja)
Other versions
JPS6044604A (ja
Inventor
Genroku Sugyama
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Construction Machinery Co Ltd
Original Assignee
Hitachi Construction Machinery Co Ltd
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 Hitachi Construction Machinery Co Ltd filed Critical Hitachi Construction Machinery Co Ltd
Priority to JP58151501A priority Critical patent/JPS6044604A/ja
Publication of JPS6044604A publication Critical patent/JPS6044604A/ja
Publication of JPH0319402B2 publication Critical patent/JPH0319402B2/ja
Granted legal-status Critical Current

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
    • E02F9/226—Safety arrangements, e.g. hydraulic driven fans, preventing cavitation, leakage, overheating
    • 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
    • F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
    • F15B21/04—Special measures taken in connection with the properties of the fluid
    • F15B21/042—Controlling the temperature of the fluid
    • F15B21/0423—Cooling
    • 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
    • F15B2211/20546—Type of pump variable 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
    • F15B2211/30—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
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/62—Cooling or heating means

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • Operation Control Of Excavators (AREA)
JP58151501A 1983-08-22 1983-08-22 油圧作業機の油圧回路 Granted JPS6044604A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP58151501A JPS6044604A (ja) 1983-08-22 1983-08-22 油圧作業機の油圧回路

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP58151501A JPS6044604A (ja) 1983-08-22 1983-08-22 油圧作業機の油圧回路

Publications (2)

Publication Number Publication Date
JPS6044604A JPS6044604A (ja) 1985-03-09
JPH0319402B2 true JPH0319402B2 (enrdf_load_stackoverflow) 1991-03-15

Family

ID=15519885

Family Applications (1)

Application Number Title Priority Date Filing Date
JP58151501A Granted JPS6044604A (ja) 1983-08-22 1983-08-22 油圧作業機の油圧回路

Country Status (1)

Country Link
JP (1) JPS6044604A (enrdf_load_stackoverflow)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4331151B2 (ja) 2005-09-20 2009-09-16 日立建機株式会社 建設機械の作動流体冷却制御システム
JP4859942B2 (ja) * 2009-03-16 2012-01-25 日立建機株式会社 建設機械の作動流体冷却制御システム
CN104564889B (zh) * 2015-01-29 2016-08-17 合肥工业大学 一种汽车主动稳定杆液压系统的集成阀组

Also Published As

Publication number Publication date
JPS6044604A (ja) 1985-03-09

Similar Documents

Publication Publication Date Title
JPS6246724B2 (enrdf_load_stackoverflow)
CN103382952B (zh) 带有载荷压力减小装置的液压控制装置
US20220275605A1 (en) Hydraulic control system
CN112746996A (zh) 负载敏感系统及工程起重机械
JPH0625561B2 (ja) 油圧装置
DE3762639D1 (de) Stroemungsrueckgewinnungssystem fuer hydraulikkreislaeufe mit pumpen und druckkompensierten verteilungsventilen fuer arbeitsglieder von erdbewegungsmaschinen.
CN110439057B (zh) 装载机液压系统
JPH0319402B2 (enrdf_load_stackoverflow)
US5291821A (en) Hydraulic circuit for swivel working machine
JPS642810B2 (enrdf_load_stackoverflow)
EP0704630B1 (en) Variable priority device for heavy construction equipment
CN110259741B (zh) 一种定量复合控制液压系统及工程机械
JPH06147205A (ja) 油圧作業機の油圧回路
JP2000045340A (ja) 油圧作業機械の油圧回路
JPH075283Y2 (ja) 油圧作業機の暖機回路
JP2001355604A (ja) 建設機械の油圧回路
JP2003287002A (ja) 作業用機械における油圧回路
JPS624708Y2 (enrdf_load_stackoverflow)
JPH0112962B2 (enrdf_load_stackoverflow)
US4984427A (en) Control circuit for hydraulic actuator
JPH06123303A (ja) 油圧制御装置
JPH0333797Y2 (enrdf_load_stackoverflow)
JPH0754805A (ja) 圧油供給装置の戻り流量分担回路
JPS6038639Y2 (ja) 荷役用クランプ装置
JPH04325222A (ja) 射出成形機の油圧装置