KR970009529B1 - System for moving an excavator by oil pressure - Google Patents

System for moving an excavator by oil pressure Download PDF

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Publication number
KR970009529B1
KR970009529B1 KR1019930029903A KR930029903A KR970009529B1 KR 970009529 B1 KR970009529 B1 KR 970009529B1 KR 1019930029903 A KR1019930029903 A KR 1019930029903A KR 930029903 A KR930029903 A KR 930029903A KR 970009529 B1 KR970009529 B1 KR 970009529B1
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South Korea
Prior art keywords
spool
arm
hydraulic
boom
hydraulic pump
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KR1019930029903A
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Korean (ko)
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KR950018972A (en
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권대영
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대우중공업 주식회사
석진철
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Priority to KR1019930029903A priority Critical patent/KR970009529B1/en
Publication of KR950018972A publication Critical patent/KR950018972A/en
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Publication of KR970009529B1 publication Critical patent/KR970009529B1/en

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    • 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

At the time of stopping work, by a certain amount of the regular orifice(104), the work is done in the optimum state, and at the time of a crane work, the solenoid valve(112) is operated, blocking the adjusting the oil pressure which is flowed into the left and right part of the arm spool(106) for stopping the operation of the arm spool.

Description

굴삭기용 유압구동 시스템Hydraulic Drive System for Excavators

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.

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

101 :제1유압펌프 102 : 제2유압펌프101: first hydraulic pump 102: second hydraulic pump

103 : 파일럿 펌프 104 : 고정 오리피스103: pilot pump 104: fixed orifice

105,106 : 암스풀 107,108 : 붐 스풀105,106: Armspool 107,108: Boom Spool

109 : 브리지 라인 110 : 바이패스 라인109: bridge line 110: bypass line

111 : 파일럿 밸브 112 : 솔레노이드 밸브111: pilot valve 112: solenoid valve

113 : 붐 실린더 114 : 암 실린더113: boom cylinder 114: arm cylinder

116 : 병렬라인116: parallel lines

본 발명은 굴삭기의 정지작업과 크레인 작업, 예컨대 인양작업시의 압력상승 및 작업의 언바란스를 방지하는 굴삭기용 유압구동 시스템에 관한 것이다.The present invention relates to a hydraulic drive system for excavators that prevents stop work of cranes and crane work, for example, pressure rise during lifting and unbalance of work.

종래의 유압구동 시스템은 제1도에 도시된 바와 같이 제2펌프(2)측의 콘트롤 밸브 하류에 있는 붐 스풀(8)과 그 다음 최하류에 있는 암 스풀(6)의 병렬라인(16)에 오리피스 밸브(4)를 장치하여 정지 작업 시에는 제2펌프(2)의 타임 밸런스를 이루게 한다. 또한 크레인 작업시에는 솔레노이트 밸브(12)를 작동시켜 파일러펌프(3)의 압유가 오리피스 밸브(4)를 절환시키고 제2펌프(2)의 압유가 암 스풀(6)로 유입되지 못하게 하여 크레인 작업을 하였다.The conventional hydraulic drive system has parallel lines 16 of the boom spool 8 downstream of the control valve on the side of the second pump 2 and then the female spool 6 downstream, as shown in FIG. The orifice valve 4 is attached to the second pump 2 to achieve a time balance during the stop operation. In addition, during crane work, the solenoid valve 12 is operated so that the pressure oil of the piler pump 3 switches the orifice valve 4 and the pressure oil of the second pump 2 does not flow into the female spool 6. Crane work was performed.

그러나 크레인 작업시 붐 스풀(8)과 암 스풀(6)을 연동 구동시키면 2개의 스풀의 상대 운동에 따라 제2펌프(2)는 콘크롤 밸브의 최하류에 있는 체크 및 오리피스 밸브(15)의 입구에 있는 파일럿 신호(fR)가 제2펌프(2)의 레귤레이터(RG)에 수시로 변하면서 유입되어 갑자기 고압, 고유량의 압유를 변동적으로 토출하게 되어 크레인 작업이 불안정하게 되어 굴삭기의 작업자에게 불쾌감을 야기시킨다.However, when the boom spool 8 and the arm spool 6 are driven in a crane operation, the second pump 2 is driven by the relative movement of the two spools so that the check and orifice valve 15 at the most downstream of the control valve can be The pilot signal fR at the inlet is frequently changed into the regulator RG of the second pump 2 and suddenly variably discharges the high pressure and high flow pressure oil, which makes the crane work unstable. Causes discomfort.

본 발명의 목적은 상기한 같은 단점을 제거하기 위하여 붐 스풀과 암스풀의 병렬라인에 일정용량의 고정 오리피스를 설치하고 암 스풀의 좌우측 조정유압 라인에는 솔레노이드 밸브를 설치한 굴삭기용 유압구동 시스템을 제공하여 정지작업은 최적 상태로 이루어지며 크레인 작업시에는 암 스풀이 조작되지 않게 하고자 하는 것이다.It is an object of the present invention to provide a hydraulic drive system for excavators in which fixed orifices of a certain capacity are installed on parallel lines of boom spools and arm spools and solenoid valves are installed on left and right adjusting hydraulic lines of arm spools to eliminate the above disadvantages. Therefore, the stopping work is made in an optimal state, and when the crane is working, the arm spool is not operated.

본 발명을 첨부된 도면을 참조하여 하기에 설명한다.The present invention is described below with reference to the accompanying drawings.

제2도에서는 본 발명의 유압구동 시스템이 도시되는데, 제1유압펌프(101)와 제2유압펌프(102)가 설치되고 상기 유압펌프의 토출유로에는 붐 스풀(107) 및 (108 )과 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 작동시킨다.2 shows a hydraulic drive system of the present invention, in which a first hydraulic pump 101 and a second hydraulic pump 102 are installed, and discharge paths of the hydraulic pump are boom spools 107 and 108 and an arm. Spools 105 and 106 are installed and the boom spools 107 and 108 operate the boom cylinder 113 and the arm spools 105 and 106 operate the arm cylinder 114.

붐 스풀(108)은 암 스풀(106)보다 제2유압펌프(102)로 부터 상류측에 위치되며 붐 스풀(108)과 암 스풀(106)은 바이패스 라인(110)으로 연결된다. 암 스풀(106)의 포트는 브리지 라인(109)을 통하여 바이패스 라인(110)에 연결되고 한편으로는 병렬라인(116)과 재차 연결되며 병렬라인(116)에는 고정 오리피스(104)가 설치된다.The boom spool 108 is located upstream from the second hydraulic pump 102 than the arm spool 106 and the boom spool 108 and the arm spool 106 are connected by a bypass line 110. The port of the female spool 106 is connected to the bypass line 110 via the bridge line 109 and on the other hand is again connected to the parallel line 116 and the fixed orifice 104 is installed in the parallel line 116. .

암 스풀(106)에는 파일럿 펌프(103)의 압유가 파일럿 밸브(111)를 통하여 솔레노이드 밸브(112)에 인가되며 솔레노이드 밸브(112)는 암스풀(106)을 작동시킨다.In the female spool 106, the pressure oil of the pilot pump 103 is applied to the solenoid valve 112 through the pilot valve 111, and the solenoid valve 112 operates the arm spool 106.

본 발명의 유압구동 시스템은 정지작업 시에는 일정용량의 고정 오리피스(104)에 의하여 최적상태에 정지작업이 이루어지며, 크레인 작업시에는 솔레노이드 밸브(112)를 구동시켜 암 스풀(106)의 좌우측으로 유입되는 조정유압을 차단하여 암 스풀(106)이 조작되지 않게 된다. 따라서 단독크레인 작업시에는 바이패스 라인(110)을 통과하는 제2유압펌프(102)의 압유는 브리지 라인(109)을 지나 암 스풀(106)로 유입된다.The hydraulic drive system of the present invention is stopped at the optimum state by a fixed orifice 104 of a certain capacity during the stop operation, and during the crane operation to drive the solenoid valve 112 to the left and right sides of the arm spool 106 The spool 106 is not operated by blocking the incoming adjustment hydraulic pressure. Therefore, during single crane operation, the pressure oil of the second hydraulic pump 102 passing through the bypass line 110 flows into the arm spool 106 through the bridge line 109.

암 스풀(105)과 붐 스풀(107) 및 (108)의 연동시에는 제1유압펌프(101)의 압유는 암 스풀(105)로 우선 유입되고 제2유압펌프(102)는 압유는 붐 스풀(108)로 만 유입된다.When the arm spool 105 is interlocked with the boom spools 107 and 108, the pressure oil of the first hydraulic pump 101 first flows into the arm spool 105, and the pressure pressure of the second hydraulic pump 102 is the boom spool. Only flows into 108.

제2유압펌프(102)의 압유는 붐 스풀(108)의 스트로크에 따라 변하게 되어 안정적 압력 상승과 암 실린더(114)과 붐 실린더(113)의 유량 분배가 안정되어 정확한 크레인 작업이 가능해진다.The pressure oil of the second hydraulic pump 102 is changed according to the stroke of the boom spool 108, so that the stable pressure rise and the flow distribution of the arm cylinder 114 and the boom cylinder 113 are stabilized, thereby enabling accurate crane operation.

상기와 같이 구성된 본 발명의 굴삭기용 시스템은 굴삭기의 정지작업과 크레인 작업이 정확해지게 하고 저압의 시스템 상태에서 이루어지기 때문에 에너지 절약과 작업이 원활하게 이루어지는 효과가 있다.Excavator system of the present invention configured as described above has the effect of making energy saving and working smoothly because the stop work and the crane work of the excavator to be accurate and made in a low pressure system state.

Claims (5)

제1유압펌프(101)와 제2유압펌프(102)가 설치되고 상기 유압펌프의 토출유로에는 붐 스풀(107) 및(108)과 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 flow path 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 through 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).
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 KR950018972A (en) 1995-07-22
KR970009529B1 true KR970009529B1 (en) 1997-06-14

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