WO2015119311A1 - Soupape de commande pour équipement de construction et son procédé de commande - Google Patents

Soupape de commande pour équipement de construction et son procédé de commande Download PDF

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Publication number
WO2015119311A1
WO2015119311A1 PCT/KR2014/001050 KR2014001050W WO2015119311A1 WO 2015119311 A1 WO2015119311 A1 WO 2015119311A1 KR 2014001050 W KR2014001050 W KR 2014001050W WO 2015119311 A1 WO2015119311 A1 WO 2015119311A1
Authority
WO
WIPO (PCT)
Prior art keywords
spool
pilot pressure
spring
pressure chamber
pilot
Prior art date
Application number
PCT/KR2014/001050
Other languages
English (en)
Korean (ko)
Inventor
주상규
강민혁
Original Assignee
볼보 컨스트럭션 이큅먼트 에이비
주상규
강민혁
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 볼보 컨스트럭션 이큅먼트 에이비, 주상규, 강민혁 filed Critical 볼보 컨스트럭션 이큅먼트 에이비
Priority to PCT/KR2014/001050 priority Critical patent/WO2015119311A1/fr
Publication of WO2015119311A1 publication Critical patent/WO2015119311A1/fr

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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
    • E02F9/2264—Arrangements or adaptations of elements for hydraulic drives
    • E02F9/2267—Valves or distributors
    • 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
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
    • F15B13/0401—Valve members; Fluid interconnections therefor
    • F15B13/0402—Valve members; Fluid interconnections therefor for linearly sliding valves, e.g. spool valves
    • 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
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
    • F15B13/042—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure

Definitions

  • the present invention relates to a construction machine, and more specifically, to a control valve and a control method for controlling the flow of the flow supplied from the hydraulic pump to the hydraulic actuator by the spool switching.
  • Supply passages 5 connected in parallel to the pump passages 4 and actuator supply passages 6 and 7 connected to the hydraulic actuators 2 are formed.
  • a check valve C is installed in the passage between the pump passage 4 and the supply passage 5 so as to be openable and openable.
  • the hydraulic oil of the hydraulic pump 1 is supplied to the hydraulic actuator 2, and at the same time, the hydraulic oil discharged from the hydraulic actuator 2 is supplied to the hydraulic oil tank ( A spool 10 for draining to the valve body 3 is provided in a switchable manner.
  • the spool 10 when a pilot pressure is applied to the pilot port 8, the spool 10 is switched in the right direction in the drawing. By the switching of the spool 10, the supply passage 5 and the one-side actuator supply passage 6 communicate with each other. At this time, the hydraulic oil of the hydraulic pump 1 is supplied to the pump passage 4 to open the check valve (C). Therefore, the hydraulic oil of the hydraulic pump 1 passes through the pump passage 4-the supply passage 5-one actuator supply passage 6 in order and is supplied to the large chamber of the hydraulic actuator 2.
  • the electromagnetic proportional pressure reducing valve when the electromagnetic proportional pressure reducing valve is applied to control the pilot pressure applied to the pilot ports 8 and 9, the electromagnetic proportional pressure reducing valve is mounted to the pilot ports 8 and 9, respectively. Due to the increase in the number of parts due to the electromagnetic proportional pressure reducing valve has a problem that the cost cost increases.
  • an object of the present invention is to provide a control valve for a construction machine and a control method thereof capable of controlling the spool of the control valve in both directions by one electromagnetic proportional pressure reducing valve.
  • the valve body is formed with a supply passage connected in parallel to the pump passage is supplied with the hydraulic oil of the hydraulic pump, and an actuator supply passage connected to the hydraulic actuator;
  • the spool which is internally switchable to the valve body, the spool is pressurized in one direction by the spool spring, and in a neutral state when a pilot pressure exceeding the set set pressure of the spool spring is applied in a direction opposite to the pressing direction of the spool spring.
  • a pilot pressure chamber formed on one side of the valve body and configured to apply a pilot pressure for switching the spool through a pilot port.
  • a control valve for a construction machine characterized in that the spool is switched in a direction opposite to the pressing direction of the spool spring to connect one to the tank passage.
  • An electric operation lever for applying an electrical signal to the electromagnetic proportional pressure reducing valve is used to switch the spool to a predetermined position.
  • a stopper installed in a second passage between the pilot port and the pilot pressure chamber, the stopper preventing the neutral of the spool from being released by the elastic force of the spool spring when the equipment is turned off;
  • a stopper spring elastically biases to press the stopper that presses the end of the spool to an initial state so that the neutral of the spool is maintained even when the starting of the equipment is turned off.
  • the elastic force of the stopper spring is greater than the elastic force of the spool spring.
  • the valve body is formed with a supply passage connected in parallel to the pump passage is supplied with the hydraulic oil of the hydraulic pump, and an actuator supply passage connected to the hydraulic actuator;
  • the pilot pressure applied to the pilot pressure chamber to switch the spool to the first position is 0 to 20 kgf / cm 2
  • the pilot pressure applied to the pilot pressure chamber to maintain the spool in a neutral state is 20 kg. f / cm 2
  • the pilot pressure applied to the pilot pressure chamber for switching the spool to the second position is 20 to 40 kgf / cm 2.
  • FIG. 1 is a schematic view of a control valve for a construction machine according to the prior art
  • FIG. 2 is a schematic view of a control valve for a construction machine according to the disclosed subject matter
  • FIG. 3 is a view of the spool neutral state of the control valve shown in FIG.
  • FIG. 4 is a view of a state in which the spool of the control valve shown in FIG. 2 is switched in one direction;
  • FIG. 5 is a view showing a state in which the spool of the control valve shown in FIG. 2 is switched in another direction;
  • FIG. 6 is a flowchart of a control valve control method for a construction machine according to the disclosed contents of the present invention.
  • Figure 2 is a schematic view of a control valve for a construction machine according to the disclosure of the present invention
  • Figure 3 is a view of the spool neutral state of the control valve shown in Figure 2
  • Figure 4 is a spool of the control valve shown in Figure 2
  • 5 is a view of a state switched in one direction
  • Figure 5 is a view of a state in which the spool of the control valve shown in Figure 2 is switched in another direction
  • Figure 6 is a control valve control method for a construction machine according to the disclosure of the present invention Is a flow chart.
  • Supply passages 5 connected in parallel to the pump passages 4 and actuator supply passages 6 and 7 connected to the hydraulic actuators 2 are formed.
  • a check valve C is installed in the passage between the pump passage 4 and the supply passage 5 so as to be openable and openable.
  • the spool 10 is pressurized in one direction by the spool spring 18, and the pilot pressure exceeding a preset set pressure of the spool spring 18 is opposite to the pressing direction of the spool spring 18. When applied to the seal 12 will maintain a neutral state.
  • the pilot pressure chamber 12 communicates with the pilot port 13 through which the hydraulic oil flows through the second passage 14 communicating with the pilot port 13.
  • An electromagnetic proportional pressure reducing valve 17 for converting the hydraulic oil flowing through the pilot port 13 into a pilot pressure corresponding to an applied electrical signal to apply the converted pilot pressure to the pilot pressure chamber 12 is provided.
  • the first passage 15 between the port 13 and the pilot pressure chamber 12 is provided.
  • an electric operation lever (referring to RCV not shown) for applying an electrical signal to the electromagnetic proportional pressure reducing valve 17 may be used to switch the spool to a predetermined position.
  • a stopper 16 is provided between the pilot port 13 and the pilot pressure chamber 12 to prevent the neutral of the spool 10 from being released by the elastic force of the spool spring 18 when the equipment is turned off. It is installed to be switchable in the second passage (14).
  • a stopper spring 19 which elastically biases to press the stopper 16 which presses one end of the spool 10 so as to maintain the neutrality of the spool 10 even when the starting of the equipment is turned off. can do. At this time, the elastic force of the stopper spring 19 is greater than the elastic force of the spool spring 18.
  • pilot pressure (20-40 kgf / cm 2) applied to the pilot pressure chamber 12 is greater than the pilot pressure (20 kgf / cm 2) applied to keep the spool 10 in a neutral state.
  • the spool (s) for communicating the other of the pump passage (4) and the actuator supply passage (6,7) and any one of the actuator supply passage (6,7) to the tank passage (11) 10) is switched in the direction opposite to the pressing direction of the spool spring (18).
  • reference numeral a denotes a center bypass flow path for returning the working oil in the pump passage 4 to the working oil tank when the spool 10 is neutral.
  • the stopper 16 is subjected to the elastic force of the stopper spring 19 in the state that the start of the equipment (OFF) OFF.
  • the elastic force of the stopper spring 19 to elastically support the stopper 16 is relatively greater than the elastic force of the spool spring 18 to elastically support the spool 10.
  • the electromagnetic proportional pressure reducing valve 17 reduces the hydraulic oil flowing through the pilot port 13 and introduced into the second passage 14 to a predetermined set pressure (for example, 20 kgf / cm 2).
  • the reduced pilot pressure is applied to the pilot pressure chamber 12.
  • the process proceeds to S40, and the secondary pilot pressure applied to the pilot pressure chamber 12 is the spool spring ( If it is smaller than the set pressure of 18), proceed to S20.
  • an electric signal corresponding to the manipulated amount is applied to the electromagnetic proportional pressure reducing valve 17 as the electric operation lever is operated to extend and drive the hydraulic actuator 2.
  • the electromagnetic proportional pressure reducing valve 17 converts the hydraulic oil flowing into the second passage 14 into the secondary pilot pressure and converts the secondary pilot pressure (eg, 20 to 20) into the pilot pressure chamber 12. 40 kgf / cm 2) is applied.
  • the secondary pilot pressure applied to the pilot pressure chamber 12 exceeds the elastic force of the spool spring 18 supporting the spool 10
  • the spool 10 is switched in the right direction in the drawing ( The spool 10 is switched to the second position) (S60).
  • the supply passage 5 and the one-side actuator supply passage 6 communicate with each other.
  • the check valve (C) is opened by the hydraulic oil supplied from the hydraulic pump (1) to the pump passage (4). Therefore, the hydraulic oil of the hydraulic pump 1 passes through the pump passage 4-the supply passage 5-the actuator supply passage 6 and is supplied to the large chamber of the hydraulic actuator 2. At this time, the hydraulic oil discharged from the small chamber of the hydraulic actuator 2 is returned to the hydraulic oil tank (not shown) through the actuator supply passage 7-tank passage (11).
  • the hydraulic actuator 2 can be extended and driven.
  • an electric signal corresponding to the operation amount is applied to the electromagnetic proportional pressure reducing valve 17 as the electric operation lever is operated to shrink and drive the hydraulic actuator 2.
  • the electromagnetic proportional pressure reducing valve 17 converts the hydraulic oil flowing into the second passage 14 into the secondary pilot pressure and converts the secondary pilot pressure (eg, 0 to 0) into the pilot pressure chamber 12. 20 kgf / cm 2) is applied.
  • the secondary pilot pressure applied to the pilot pressure chamber 12 is smaller than the elastic force of the spool spring 18 supporting the spool 10
  • the spool 10 is switched to the left in the drawing (spool). (10) is switched to the first position) (S70).
  • the supply passage 5 and the other actuator supply passage 7 communicate with each other.
  • the check valve (C) is opened by the hydraulic oil supplied from the hydraulic pump (1) to the pump passage (4). Therefore, the hydraulic oil of the hydraulic pump 1 passes through the pump passage 4-the supply passage 5-the other actuator supply passage 7 in order and is supplied to the small chamber of the hydraulic actuator 2. At this time, the hydraulic oil discharged from the large chamber of the hydraulic actuator 2 is returned to the hydraulic oil tank (not shown) through the one-side actuator supply passage 6-tank passage (11).

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

Abstract

L'invention porte sur une soupape de commande pour un équipement de construction qui permet de commander un écoulement d'huile fourni à un actionneur hydraulique à partir d'une pompe hydraulique par commutation d'un tiroir et sur son procédé de commande. La soupape de commande pour un équipement de construction selon la présente invention comprend : un corps de soupape ayant un passage d'alimentation et un passage d'alimentation d'actionneur formé à l'intérieur de celui-ci, le passage d'alimentation étant relié en parallèle à un passage de pompe à travers lequel de l'huile hydraulique d'une pompe hydraulique est fournie, et le passage d'alimentation d'actionneur étant relié à un actionneur hydraulique ; un tiroir installé de façon à être commutable dans le corps de soupape ; une chambre de pression pilote à laquelle une pression pilote pour commuter le tiroir est appliquée par l'intermédiaire d'un orifice pilote, le tiroir étant commuté dans une direction de pression d'un ressort de tiroir quand une pression pilote arbitraire appliquée à la chambre de pression pilote est inférieure à une pression établie du ressort de tiroir, maintenu dans un état neutre quand une autre pression pilote appliquée à la chambre de pression pilote est supérieure à la pression établie du ressort de tiroir, et commuté dans la direction opposée à la direction de pression du ressort de tiroir quand encore une autre pression pilote appliquée à la chambre de pression pilote est supérieure à la pression pilote appliquée pour maintenir le tiroir dans l'état neutre.
PCT/KR2014/001050 2014-02-07 2014-02-07 Soupape de commande pour équipement de construction et son procédé de commande WO2015119311A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/KR2014/001050 WO2015119311A1 (fr) 2014-02-07 2014-02-07 Soupape de commande pour équipement de construction et son procédé de commande

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/KR2014/001050 WO2015119311A1 (fr) 2014-02-07 2014-02-07 Soupape de commande pour équipement de construction et son procédé de commande

Publications (1)

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WO2015119311A1 true WO2015119311A1 (fr) 2015-08-13

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113090603A (zh) * 2021-03-29 2021-07-09 徐州徐工挖掘机械有限公司 先导比例控制阀装置、自动标定方法以及介质
CN113544389A (zh) * 2019-09-25 2021-10-22 日立建机株式会社 作业机械

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4543875A (en) * 1982-12-07 1985-10-01 Mannesmann Rexroth Gmbh Electro-hydraulic directional control valve
KR20060024918A (ko) * 2004-09-15 2006-03-20 주식회사 파카한일유압 유압 컨트롤 밸브의 스풀 제어 장치
US20090101854A1 (en) * 2007-10-22 2009-04-23 Volvo Construction Equipment Holding Sweden Ab. Hydraulic control valve for heavy equipment
KR20100044941A (ko) * 2008-10-23 2010-05-03 볼보 컨스트럭션 이키프먼트 홀딩 스웨덴 에이비 중장비용 유압제어밸브
US20110232791A1 (en) * 2010-03-24 2011-09-29 Bengea Sorin C Proportional valve employing simultaneous and hybrid actuation

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4543875A (en) * 1982-12-07 1985-10-01 Mannesmann Rexroth Gmbh Electro-hydraulic directional control valve
KR20060024918A (ko) * 2004-09-15 2006-03-20 주식회사 파카한일유압 유압 컨트롤 밸브의 스풀 제어 장치
US20090101854A1 (en) * 2007-10-22 2009-04-23 Volvo Construction Equipment Holding Sweden Ab. Hydraulic control valve for heavy equipment
KR20100044941A (ko) * 2008-10-23 2010-05-03 볼보 컨스트럭션 이키프먼트 홀딩 스웨덴 에이비 중장비용 유압제어밸브
US20110232791A1 (en) * 2010-03-24 2011-09-29 Bengea Sorin C Proportional valve employing simultaneous and hybrid actuation

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113544389A (zh) * 2019-09-25 2021-10-22 日立建机株式会社 作业机械
CN113544389B (zh) * 2019-09-25 2024-04-05 日立建机株式会社 作业机械
CN113090603A (zh) * 2021-03-29 2021-07-09 徐州徐工挖掘机械有限公司 先导比例控制阀装置、自动标定方法以及介质
CN113090603B (zh) * 2021-03-29 2022-04-05 徐州徐工挖掘机械有限公司 先导比例控制阀装置、自动标定方法以及介质

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