KR880012471U - 굴삭기의 주행 유압시스템 공동현상 방지장치 - Google Patents

굴삭기의 주행 유압시스템 공동현상 방지장치

Info

Publication number
KR880012471U
KR880012471U KR2019860021811U KR860021811U KR880012471U KR 880012471 U KR880012471 U KR 880012471U KR 2019860021811 U KR2019860021811 U KR 2019860021811U KR 860021811 U KR860021811 U KR 860021811U KR 880012471 U KR880012471 U KR 880012471U
Authority
KR
South Korea
Prior art keywords
excavator
hydraulic system
prevention device
traveling hydraulic
cavitation prevention
Prior art date
Application number
KR2019860021811U
Other languages
English (en)
Other versions
KR900003526Y1 (ko
Inventor
이종원
공희석
Original Assignee
대우중공업주식회사
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 대우중공업주식회사 filed Critical 대우중공업주식회사
Priority to KR2019860021811U priority Critical patent/KR900003526Y1/ko
Publication of KR880012471U publication Critical patent/KR880012471U/ko
Application granted granted Critical
Publication of KR900003526Y1 publication Critical patent/KR900003526Y1/ko

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
    • F15B21/047—Preventing foaming, churning or cavitation
    • 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
    • F15B2211/32—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
    • F15B2211/80—Other types of control related to particular problems or conditions
    • F15B2211/86—Control during or prevention of abnormal conditions
    • F15B2211/8609—Control during or prevention of abnormal conditions the abnormal condition being cavitation

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (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)
  • Fluid-Pressure Circuits (AREA)
  • Operation Control Of Excavators (AREA)
KR2019860021811U 1986-12-30 1986-12-30 굴삭기의 주행 유압시스템 공동현상 방지장치 KR900003526Y1 (ko)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR2019860021811U KR900003526Y1 (ko) 1986-12-30 1986-12-30 굴삭기의 주행 유압시스템 공동현상 방지장치

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR2019860021811U KR900003526Y1 (ko) 1986-12-30 1986-12-30 굴삭기의 주행 유압시스템 공동현상 방지장치

Publications (2)

Publication Number Publication Date
KR880012471U true KR880012471U (ko) 1988-08-27
KR900003526Y1 KR900003526Y1 (ko) 1990-04-28

Family

ID=19258570

Family Applications (1)

Application Number Title Priority Date Filing Date
KR2019860021811U KR900003526Y1 (ko) 1986-12-30 1986-12-30 굴삭기의 주행 유압시스템 공동현상 방지장치

Country Status (1)

Country Link
KR (1) KR900003526Y1 (ko)

Also Published As

Publication number Publication date
KR900003526Y1 (ko) 1990-04-28

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Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
E701 Decision to grant or registration of patent right
NORF Unpaid initial registration fee