KR950018972A - Hydraulic Drive System for Excavators - Google Patents

Hydraulic Drive System for Excavators Download PDF

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Publication number
KR950018972A
KR950018972A KR1019930029903A KR930029903A KR950018972A KR 950018972 A KR950018972 A KR 950018972A KR 1019930029903 A KR1019930029903 A KR 1019930029903A KR 930029903 A KR930029903 A KR 930029903A KR 950018972 A KR950018972 A KR 950018972A
Authority
KR
South Korea
Prior art keywords
spool
hydraulic
arm
drive system
boom
Prior art date
Application number
KR1019930029903A
Other languages
Korean (ko)
Other versions
KR970009529B1 (en
Inventor
권대영
Original Assignee
석진철
대우중공업 주식회사
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.)
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Publication date
Application filed by 석진철, 대우중공업 주식회사 filed Critical 석진철
Priority to KR1019930029903A priority Critical patent/KR970009529B1/en
Publication of KR950018972A publication Critical patent/KR950018972A/en
Application granted granted Critical
Publication of KR970009529B1 publication Critical patent/KR970009529B1/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
    • E02F9/2221—Control of flow rate; Load sensing arrangements
    • 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
    • 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
    • E02F9/2278—Hydraulic circuits
    • E02F9/2285—Pilot-operated systems
    • 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
    • E02F9/2278—Hydraulic circuits
    • E02F9/2292—Systems with two or more pumps

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

Abstract

본 발명은 굴삭기의 정지작업과 크레인 작업시의 압력 상승 및 작업의 언바란스를 방지하는 굴삭기용 유압구동 시스템에 관한 것으로 정지작업시에는 일정용량의 고정 오리피스에 의하여 작업이 이루어지며 크레인 작업시에는 솔레노이드 밸브를 구동시켜 암 스풀의 좌우측으로 유입되는 조정유압을 차단하여 암 스풀이 조작되지 않게 된다.The present invention relates to a hydraulic drive system for excavators to prevent the stop operation of the excavator and the pressure rise and unbalance of the operation during the operation of the excavator is made by a fixed orifice of a fixed capacity during the stop operation and the solenoid valve during the crane operation The drive spool shuts off the adjustment hydraulic pressure flowing into the left and right sides of the arm spool so that the arm spool is not operated.

Description

굴삭기용 유압구동 시스템Hydraulic Drive System for Excavators

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제1도는 종래의 유압구동 시스템을 도시하는 유압회로도.1 is a hydraulic circuit diagram showing a conventional hydraulic drive system.

제2도는 본 발명의 유압구동 시스템을 도시하는 유압회로도.2 is a hydraulic circuit diagram showing the hydraulic drive system of the present invention.

Claims (5)

제1유압펌프(101)와 제2유압펌프(102)가 설치되고 상기 유압펌프의 토출유로에는 붐 스풀(107) 및 (108)고 암 스풀(105) 및 (106)이 설치되며 붐 스풀(107) 및 (108)은 붐 실린더(113)를 작동시키고 암 스풀(105) 및 (106)은 암 실린더(114)를 작동시키며 붐 스풀(108)은 암 스풀(106)보다 제2유압펌프(102)로 부터 상류측에 위치되고 붐 스풀(108)과 암 스풀(106)은 바이패스 라인(110)으로 연결되는 굴삭기용 유압구동 시스템에 있어서, 암 스풀(106)의 포트는 브리지 라인(109)을 통하여 바이패스 라인(110)에 연결되고 병렬라인(116)과 재차 연결되며 병렬라인(116)에는 고정 오리피스(104)가 설치되고 암 스풀(106)에는 파일럿 펌프(103)의 압유가 파일럿 밸브(111)를 통하여 솔레노이드 밸브(112)에 인가되며 솔레노이드 밸브(112)는 암 스풀(106)을 작동시키게 구성되는 굴삭기용 유압구동 시스템.The first hydraulic pump 101 and the second hydraulic pump 102 are installed, and the boom spools 107 and 108 and the arm spools 105 and 106 are installed in the discharge passage of the hydraulic pump. 107 and 108 operate the boom cylinder 113, the arm spool 105 and 106 operate the arm cylinder 114, and the boom spool 108 has a second hydraulic pump than the arm spool 106. In the hydraulic drive system for excavators located upstream from 102 and the boom spool 108 and the arm spool 106 connected to the bypass line 110, the port of the arm spool 106 is the bridge line 109. Is connected to the bypass line 110, and is again connected to the parallel line 116, a fixed orifice 104 is installed in the parallel line 116 and the hydraulic oil of the pilot pump 103 is piloted to the arm spool 106 A hydraulic drive system for an excavator is applied to the solenoid valve 112 via the valve 111 and the solenoid valve 112 is configured to operate the arm spool 106. . 제1항에 있어서, 상기 고정 오리피스(104)는 일정용량을 거쳐서 최적상태에 정지 작업이 이루어지는 굴삭기용 유압구동 시스템.The hydraulic drive system according to claim 1, wherein the fixed orifice (104) has a stationary work at an optimum state through a predetermined capacity. 제1항에 있어서, 단독크레인 작업시에는 바이패스 라인(110)을 통과하는 제2유압 펌프(102)의 압유는 브리지 라인(109)을 지나 암 스풀(106)로 유입되는 굴삭기용 유압구동 시스템.The hydraulic drive system for an excavator according to claim 1, wherein the oil pressure of the second hydraulic pump (102) passing through the bypass line (110) during the single crane operation is introduced into the female spool (106) through the bridge line (109). . 제1항에 있어서, 암 스풀(105)과 붐 스풀(107) 및 (108)의 연동시에는 제1유압펌프(101)의 압유는 암 스풀(105)로 우선 유입되고 제2유압펌프(102)의 압유는 붐 스풀(108)로 만 유입되는 굴삭기용 유압구동 시스템.The hydraulic pressure of the first hydraulic pump 101 is first introduced into the female spool 105 and the second hydraulic pump 102 is coupled with the arm spool 105 and the boom spools 107 and 108. Hydraulic pressure system for the excavator is introduced into the boom spool 108 only. 제4항에 있어서, 제2유압펌프(102)의 압유는 붐 스풀(108)의 스트로크에 따라 변하게 되는 굴삭기용 유압구동 시스템.The hydraulic drive system according to claim 4, wherein the pressure oil of the second hydraulic pump (102) is changed according to the stroke of the boom spool (108). ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019930029903A 1993-12-27 1993-12-27 System for moving an excavator by oil pressure KR970009529B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019930029903A KR970009529B1 (en) 1993-12-27 1993-12-27 System for moving an excavator by oil pressure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019930029903A KR970009529B1 (en) 1993-12-27 1993-12-27 System for moving an excavator by oil pressure

Publications (2)

Publication Number Publication Date
KR950018972A true KR950018972A (en) 1995-07-22
KR970009529B1 KR970009529B1 (en) 1997-06-14

Family

ID=19372903

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019930029903A KR970009529B1 (en) 1993-12-27 1993-12-27 System for moving an excavator by oil pressure

Country Status (1)

Country Link
KR (1) KR970009529B1 (en)

Also Published As

Publication number Publication date
KR970009529B1 (en) 1997-06-14

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