KR970043640A - Variable capacity pump flow control device for heavy equipment - Google Patents

Variable capacity pump flow control device for heavy equipment Download PDF

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Publication number
KR970043640A
KR970043640A KR1019950054783A KR19950054783A KR970043640A KR 970043640 A KR970043640 A KR 970043640A KR 1019950054783 A KR1019950054783 A KR 1019950054783A KR 19950054783 A KR19950054783 A KR 19950054783A KR 970043640 A KR970043640 A KR 970043640A
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KR
South Korea
Prior art keywords
pump
control valve
flow rate
pressure
heavy equipment
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Application number
KR1019950054783A
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Korean (ko)
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KR0166190B1 (en
Inventor
정광식
Original Assignee
석진철
대우중공업 주식회사
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Priority to KR1019950054783A priority Critical patent/KR0166190B1/en
Publication of KR970043640A publication Critical patent/KR970043640A/en
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Publication of KR0166190B1 publication Critical patent/KR0166190B1/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
    • E02F9/2232—Control of flow rate; Load sensing arrangements using one or more variable displacement pumps
    • 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
    • E02F9/2296—Systems with a variable displacement pump

Abstract

본 발명은 중장비의 작동상태에 따라 펌프에서 토출되는 압유가 가변되어지도록 한 가변용량형펌프의 유량제어장치에 관한 것으로, 가변용량형펌프에서 토출되는 압유가 각각의 조작레버(13)에 의해 작동되는 다수개의 스푸울(3,-7)을 갖춘 메인콘트롤밸브(2)에 의해 각각의 액튜에이터(8,-12)로 공급되어지고, 이들 액튜에이터의 작동상태에 따라 펌프유량조절기구(17)에 의해 펌프(1)에서 토출되는 압유의 량이 제어되어지도록 이루어지며, 상기 펌프유량조절기구(17)가 펌프(1)의 경사판(20)과 기계적으로 연결된 서어보피스톤(21)과 서어보피스톤(21)의 수압실에 공급되는 압유의 흐름을 제어하는 제어밸브(22) 및, 상기 메인콘트롤밸브(2)의 센터바이패스라인(15)과 연결된 네가콘라인(24)의 압력에 의해 작동하는 네가콘피스톤(26)으로 구성된 중장비의 가변용량형펌프의 유량제어장치에서, 상기 네가콘라인(24)에 압력스위치(23)가 설치되고, 상기 서어보피스톤(21)과 제어밸브(22)의 연결을 연결시키는 라인(29a)에 압유의 흐름을 제어하는 솔레노이드밸브(31)가 설치되며, 상기 압력스위치(30)와 솔레노이드밸브(31)가 제어반(32)에 전기적으로 연결된 구성으로 이루어져, 조작레버(13)를 급격하게 작동시켜도 펌프(1)의 토출유량이 급변하지 않고 부드럽게 가변되어지도록 하므로써 중장비의 제어성이 향상되도록 한 것이다.The present invention relates to a flow rate control device for a variable displacement pump in which the pressure oil discharged from the pump is varied according to the operating state of the heavy equipment, and the pressure oil discharged from the variable displacement pump is operated by the respective operation levers 13. It is supplied to each of the actuators 8, -12 by the main control valve 2 having a plurality of sprues 3, -7, which are supplied to the pump flow adjusting mechanism 17 according to the operating state of these actuators. The amount of pressure oil discharged from the pump 1 is controlled so that the pump flow adjusting mechanism 17 is mechanically connected to the inclined plate 20 of the pump 1, and the servoboston 21 and the servoboston ( 21 is operated by the pressure of the control valve 22 for controlling the flow of the pressure oil supplied to the hydraulic chamber of the 21, and the negative cone line 24 connected to the center bypass line 15 of the main control valve (2) For changing heavy equipment composed of negative cone piston 26 In the flow rate control apparatus of the two-pump pump, a pressure switch 23 is installed in the negative cone line 24, and a pressure oil is applied to a line 29a for connecting the servo piston 21 and the control valve 22 to each other. Solenoid valve 31 for controlling the flow is installed, the pressure switch 30 and the solenoid valve 31 is composed of a configuration electrically connected to the control panel 32, even if the operating lever 13 to operate the pump suddenly ( It is to improve the controllability of heavy equipment by allowing the discharge flow rate of 1) to be changed smoothly without sudden change.

Description

중장비의 가변용량펌프 유량제어장치Variable capacity pump flow control device for heavy equipment

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

제1도는 본 발명에 따른 유량제어장치를 도시한 개략적인 유압회로도.1 is a schematic hydraulic circuit diagram showing a flow control apparatus according to the present invention.

제2도는 본 발명에 따른 장치에서 조작레버의 변위상태와 액튜에이터의 변위상태를 비교하여 도시한 그래프.2 is a graph showing the displacement state of the actuator and the displacement state of the actuator in the apparatus according to the present invention.

제3도는 일반적으로 중장비에서 채택하고 있는 가변용량형 펌프의 유량제어장치를 나타낸 그래프.3 is a graph showing a flow control device of a variable displacement pump generally adopted in heavy equipment.

제4도는 네가콘압력과 펌프의 토출유량관계를 도시한 그래프.4 is a graph showing the relationship between the negative cone pressure and the discharge flow rate of the pump.

제5도는 센터바이패스유량과 네가콘압력의 관계를 도시한 그래프.5 is a graph showing the relationship between the center bypass flow rate and the negative cone pressure.

Claims (4)

펌프(1)에서 토출되는 압유를 하나이상 다수개의 스푸울(3,4,5,6,7)을 갖춘 메인콘트롤밸브(2)에서 그 흐름을 제어하여 작동시키고자 하는 액튜에이터(8,9,10,11,12)로 공급하게 되어 있고, 상기 펌프(1)에서 토출되는 압유의 량은 액튜에이터(8,9,10,11,12)의 가동상태에 따라 상기 메인콘트롤밸브(2)와 네가콘라인(24)을 통해 연결된 펌프유량제어기구(17)에 의해 펌프(1)의 토출유량이 제어되어지도록 되어 있으며, 상기 펌프유량제어기구(17)가 펌프(1)이 경사판(20)과 연결되어 상기 펌프(1)의 토출량을 직접적으로 제어하는 서어보피스톤(21)과 이 서어보피스톤(21)의 대경실(18)에 공급되는 압유의 흐름을 제어하는 제어밸브(22) 및 상기 네가콘라인(24)의 압력을 전달받아 가동되면서 제어밸브(22)의 스푸울(25)을 이동시키는 네가콘밸브(26)로 구성된 중장비의 가변용량형펌프의 토출유량제어장치에 있어서, 상기 네가콘라인(24)에 압력스위치(30)가 설치되고, 상기 서어보피스톤(21)의 대경실(18)과 제어밸브(22)사이에 압유의 유동량을 제어하는 솔레노이드밸브(31)가 설치되는 한편, 상기 압력스위치(30)와 솔레노이드밸브(31)가 제어반(32)에 각각 전기적으로 연결된 구조로 이루어진 것을 특징으로 하는 중장비의 가변용량형펌프 토출유량제어장치.Actuators (8, 9) for controlling the flow of the hydraulic oil discharged from the pump (1) in the main control valve (2) having one or more sprues (3, 4, 5, 6, 7) 10, 11, 12, and the amount of pressure oil discharged from the pump 1 is the main control valve (2) and the negative according to the operating state of the actuator (8, 9, 10, 11, 12) The discharge flow rate of the pump 1 is controlled by the pump flow rate control mechanism 17 connected through the cone line 24. The pump flow rate control mechanism 17 allows the pump 1 to be inclined with the inclined plate 20. And a control valve 22 for controlling the flow of the hydraulic oil supplied to the large bore chamber 18 of the servoboston 21 connected to directly control the discharge amount of the pump 1, and the Variable capacity type of heavy equipment consisting of a negative cone valve 26 for moving the sprue 25 of the control valve 22 while being operated by receiving the pressure of the negative cone line 24. In the discharge flow rate control apparatus of the pump, the pressure switch 30 is provided in the negative cone line 24, and the flow amount of the pressure oil between the large diameter chamber 18 and the control valve 22 of the servo piston 21. While the solenoid valve 31 for controlling the installation is installed, the variable displacement pump discharge flow rate of heavy equipment, characterized in that the pressure switch 30 and the solenoid valve 31 is electrically connected to the control panel 32, respectively Control unit. 제1항에 있어서, 상기 솔레노이드밸브(31)에 오리피스통로(31a)와 노말오픈통로(31b)가 구비되고, 이 솔레노이드밸브(31)가 작동될 때 오리피스통로(31a)가 서어보피스톤(21)의 대경실(18)과 제어밸브(22)사이를 연결시키는 라인(29a)를 연통시키도록 된 것을 특징으로 하는 중장비의 가변용량형펌프 토출유량제어장치.The solenoid passage 31 is provided with an orifice passage 31a and a normal open passage 31b, and when the solenoid valve 31 is actuated, the orifice passage 31a is a solenoid piston 21. And a line (29a) connecting between the large diameter chamber (18) and the control valve (22). 제1항 또는 제2항에 있어서, 상기 압력스위치(30)가 포지티브 타입으로 이루어져, 상기 네가콘라인(24)에 압력이 가해지지 않는 경우에 상기 솔레노이드밸브(31)의 오리피스통로(31b)가 서어보피스톤(21)의 대경실(18)과 제어밸브(22)를 서로 연통시키도록 된 것을 특징으로 하는 중장비의 가변용량형펌프 토출유량제어장치.The pressure switch (30) according to claim 1 or 2, wherein the pressure switch (30) is of a positive type, and when the pressure is not applied to the negative cone line (24), the orifice passage (31b) of the solenoid valve (31) is closed. A large displacement variable pump discharge flow rate control apparatus for heavy equipment, characterized in that the large diameter chamber 18 and the control valve 22 of the servo piston 21 are in communication with each other. 제1항 또는 제2항에 있어서, 상기 압력스위치(30)가 네가티브 타입으로 이루어져, 상기 네가콘라인(24)에 압력이 가해지지 않는 경우에 상기 솔레노이드밸브(31)의 노말오픈통로(31b)가 서어보피스톤(21)의 대경실(18)과 제어밸브(22)를 서로 연통시키도록 된 것을 특징으로 하는 중장비의 가변용량형펌프 토출유량제어장치.The normal open passage (31b) of the solenoid valve (31) according to claim 1 or 2, wherein the pressure switch (30) is of a negative type so that no pressure is applied to the negative cone line (24). The large-capacity chamber 18 and the control valve 22 of the servo piston 21 are in communication with each other.
KR1019950054783A 1995-12-22 1995-12-22 Apparatus for controlling flowrate of variable hydraulic oil pump in heavy equipment KR0166190B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019950054783A KR0166190B1 (en) 1995-12-22 1995-12-22 Apparatus for controlling flowrate of variable hydraulic oil pump in heavy equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019950054783A KR0166190B1 (en) 1995-12-22 1995-12-22 Apparatus for controlling flowrate of variable hydraulic oil pump in heavy equipment

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KR970043640A true KR970043640A (en) 1997-07-26
KR0166190B1 KR0166190B1 (en) 1999-02-18

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100814500B1 (en) * 2007-04-02 2008-03-18 주식회사 파카한일유압 Parallel line improvement direct connection variable control valve of composition operation

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100706497B1 (en) * 2003-10-01 2007-04-10 현대중공업 주식회사 Hydraulic System with pressure conversion valve
KR100946137B1 (en) * 2004-12-15 2010-03-10 현대중공업 주식회사 Signal Line System of Valve
KR101124943B1 (en) * 2006-11-30 2012-03-27 현대중공업 주식회사 Max. Flow Control System of Hydraulic Pump for Excavator
KR101328847B1 (en) * 2009-07-17 2013-11-13 현대중공업 주식회사 Negative Flow Control System for Mini Excavator

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100814500B1 (en) * 2007-04-02 2008-03-18 주식회사 파카한일유압 Parallel line improvement direct connection variable control valve of composition operation

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