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WO2014061834A1 - Dispositif de régulation automatique de pression pour une machine de construction - Google Patents

Dispositif de régulation automatique de pression pour une machine de construction Download PDF

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Publication number
WO2014061834A1
WO2014061834A1 PCT/KR2012/008439 KR2012008439W WO2014061834A1 WO 2014061834 A1 WO2014061834 A1 WO 2014061834A1 KR 2012008439 W KR2012008439 W KR 2012008439W WO 2014061834 A1 WO2014061834 A1 WO 2014061834A1
Authority
WO
WIPO (PCT)
Prior art keywords
pressure
relief valve
main
main relief
hydraulic
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/KR2012/008439
Other languages
English (en)
Korean (ko)
Inventor
강민혁
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Volvo Construction Equipment AB
Original Assignee
Volvo Construction Equipment AB
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 Volvo Construction Equipment AB filed Critical Volvo Construction Equipment AB
Priority to PCT/KR2012/008439 priority Critical patent/WO2014061834A1/fr
Publication of WO2014061834A1 publication Critical patent/WO2014061834A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • E02F9/2278—Hydraulic circuits
    • E02F9/2296—Systems with a variable displacement pump
    • 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
    • E02F9/2225—Control of flow rate; Load sensing arrangements using pressure-compensating valves
    • E02F9/2228—Control of flow rate; Load sensing arrangements using pressure-compensating valves including an electronic controller
    • 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
    • E02F9/2282—Systems using center bypass type changeover valves
    • 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
    • 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
    • F15B20/00—Safety arrangements for fluid actuator systems; Applications of safety devices in fluid actuator systems; Emergency measures for fluid actuator systems
    • F15B20/007—Overload
    • 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
    • F15B2211/50—Pressure control
    • F15B2211/505—Pressure control characterised by the type of pressure control means
    • F15B2211/50509—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means
    • F15B2211/50518—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means using pressure relief 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/50—Pressure control
    • F15B2211/515—Pressure control characterised by the connections of the pressure control means in the circuit
    • F15B2211/5157—Pressure control characterised by the connections of the pressure control means in the circuit being connected to a pressure source and a return line
    • 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
    • F15B2211/50—Pressure control
    • F15B2211/52—Pressure control characterised by the type of actuation
    • F15B2211/526—Pressure control characterised by the type of actuation electrically or electronically
    • 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
    • F15B2211/50—Pressure control
    • F15B2211/55—Pressure control for limiting a pressure up to a maximum pressure, e.g. by using a pressure relief 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
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/63—Electronic controllers
    • F15B2211/6303—Electronic controllers using input signals
    • F15B2211/6306—Electronic controllers using input signals representing a pressure
    • 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
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/63—Electronic controllers
    • F15B2211/6303—Electronic controllers using input signals
    • F15B2211/6306—Electronic controllers using input signals representing a pressure
    • F15B2211/6309—Electronic controllers using input signals representing a pressure the pressure being a pressure source supply pressure
    • 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
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/665—Methods of control using electronic components

Definitions

  • the present invention relates to a pressure automatic control device for a construction machine, and more particularly, to a pressure control device for a construction machine to maintain a constant initial setting pressure of the main relief valve for setting the maximum pressure of the hydraulic system.
  • the engine 1 The engine 1,
  • a hydraulic actuator 4 such as a boom cylinder connected to the main hydraulic pump 2,
  • a control valve (5) installed in the flow path between the main hydraulic pump (2) and the hydraulic actuator (4), for controlling the starting, stopping, and direction change of the hydraulic actuator (4) at the time of switching;
  • An operation lever 6 which outputs an operation signal in proportion to the operation amount during operation by the driver
  • the hydraulic system is provided with a main relief valve (7) for relief of the hydraulic oil of the excess pressure to the hydraulic tank (T) in the event of an overload exceeding the set pressure.
  • the pilot signal pressure from the pilot pump 3 is input to the hydraulic pressure port of the control valve 5, so that the internal spool is left or right in the drawing. It is switched to the right direction.
  • the hydraulic system can maintain the maximum pressure set by the main relief valve 7.
  • the pressure of the main relief valve (7) is set to two pressures of standard pressure and high pressure, it is possible to work by increasing the pressure of the hydraulic system from standard pressure to high pressure according to the working conditions. That is, it is possible to increase the pressure to the set maximum pressure of the main relief valve 7 by the pilot pressure pressurized from the pilot pump (3).
  • the increase in the operating time of the construction machine causes a wear phenomenon of the internal components constituting the main relief valve (7), a pressure-down phenomenon that a pressure lower than the initially set maximum pressure of the hydraulic system is formed according to the amount of wear.
  • the change of the hydraulic system temperature inside the construction machine causes a change in the maximum pressure of the hydraulic system.
  • the set pressure of the hydraulic system can be kept constant, and the automatic control of the pressure for construction machinery, which allows the driver to easily reset through the operation of buttons on the work display window when the setting pressure of the main relief valve is changed. Associated with the device.
  • a hydraulic actuator connected to the main hydraulic pump
  • a control valve installed in a flow path between the main hydraulic pump and the hydraulic actuator and controlling the start, stop and direction change of the hydraulic actuator at the time of switching;
  • An operation lever for outputting an operation signal in proportion to the operation amount during operation by the driver
  • a main relief valve installed in a discharge flow path of the main hydraulic pump
  • a first pressure sensor installed in a flow path between the main hydraulic pump and the main relief valve and detecting a set pressure of the hydraulic system in relief in real time and outputting a detection signal
  • a second pressure sensor installed in a flow path between the main relief valve and the hydraulic tank, the second pressure sensor configured to detect the outlet pressure of the main relief valve in real time and output a detection signal during relief;
  • An electronic proportional control valve for generating a secondary pilot pressure and outputting the secondary pilot pressure to the main relief valve so as to be proportional or inversely proportional to the control signal input to adjust the setting pressure of the main relief valve;
  • a control unit for outputting a control signal to the electromagnetic proportional control valve to variably adjust the setting pressure of the main relief valve according to a detection signal input in real time from the first and second pressure sensors.
  • a control unit for outputting a control signal to the electromagnetic proportional control valve to variably adjust the setting pressure of the main relief valve according to a detection signal input in real time from the first and second pressure sensors.
  • a work display window provided with a key or a button for inputting an operation signal to the control unit so that a setting pressure of the main relief valve can be adjusted to a preset pressure by operating a key or a button by a driver.
  • Automatic pressure control device for a construction machine according to an embodiment of the present invention configured as described above has the following advantages.
  • FIG. 1 is a hydraulic circuit diagram of a pressure control device for a construction machine according to the prior art
  • FIG. 2 is a hydraulic circuit diagram of an automatic pressure control device for a construction machine according to an embodiment of the present invention.
  • FIG. 2 is a hydraulic circuit diagram of a pressure automatic control device for a construction machine according to a preferred embodiment of the present invention.
  • the engine 1 The engine 1,
  • a hydraulic actuator for example, a boom cylinder, etc. 4 connected to the main hydraulic pump 2;
  • a control valve (5) installed in a flow path between the main hydraulic pump (2) and the hydraulic actuator (4) and controlling the start, stop and direction change of the hydraulic actuator (4) during switching;
  • An operation lever (RCV) 6 which outputs an operation signal in proportion to the operation amount during operation by the driver;
  • a main relief valve 7 installed in the discharge flow path of the main hydraulic pump 2;
  • a second pressure sensor 9 which detects and outputs a detection signal
  • Electron proportional control valve 10 for generating a secondary pilot pressure to output to the main relief valve (7) so as to be proportional or inversely proportional to the control signal input from the outside to adjust the set pressure of the main relief valve (7) and ,
  • a work display window provided with a key or a button for inputting an operation signal to the controller 11 so that a setting pressure of the main relief valve 7 can be adjusted to a preset pressure by operating a key or a button by a driver ( Not shown).
  • the pilot signal pressure from the pilot pump 3 is input to the hydraulic pressure port of the control valve 5, so that the internal spool is left or right in the drawing. It is switched to the right direction.
  • the hydraulic oil from the main hydraulic pump 2 is supplied to the hydraulic actuator 4 via the control valve 5 in which the spool is switched, so that the boom and the like can be operated.
  • the hydraulic system can maintain the maximum pressure set by the main relief valve 7.
  • the first pressure sensor 8 installed at the inlet side of the main relief valve 7 detects the maximum pressure of the hydraulic system at the time of relief in real time, and the electric signal corresponding to the detected pressure is controlled by the controller 11. Is sent to.
  • the second pressure sensor 9 installed at the outlet side of the main relief valve 7 at the time of relief detects the outlet side pressure at the time of relief in real time, and the electric signal corresponding to the detected pressure is transmitted to the controller 11. Is sent.
  • control unit 11 may variably adjust the pressure of the main relief valve 7 by comparing and analyzing the electric signals input in real time from the first and second pressure sensors 8 and 9 with previously stored data. In order to transmit the electric signal to the electronic proportional control valve (10).
  • the electromagnetic proportional control valve 10 generates a secondary pilot pressure corresponding to the electric signal input from the control unit 11, so that the main relief valve 7 maintains the set pressure. Will be pressed.
  • the electromagnetic proportional control valve 10 generates a secondary pilot pressure corresponding to the input electric signal to pressurize the main relief valve 7, so that the electromagnetic proportional control valve 10 can be boosted to the initial setting pressure of the main relief valve 7. Will be.
  • the electromagnetic proportional control valve 10 generates a secondary pilot pressure corresponding to the input electric signal to pressurize the main relief valve 7, so that the initial setting pressure of the main relief valve 7 can be maintained. do.
  • the setting pressure of the main relief valve 7 can be automatically and repeatedly adjusted.
  • the control signal according to the operation of the key or button provided in the work display window by the driver is transmitted to the control unit 11.
  • control unit 11 transmits an electric signal corresponding to the input operation signal to the electromagnetic proportional control valve 10, and the main relief valve is generated by the secondary pilot pressure generated by the electromagnetic proportional control valve 10. (7) is pressed.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Operation Control Of Excavators (AREA)

Abstract

L'invention concerne un dispositif de régulation automatique de pression pour une machine de construction afin de maintenir constante une pression de consigne initialement d'une valve de détente principale qui définit une pression maximale d'un système hydraulique. Selon la présente invention, le dispositif de régulation automatique de pression pour une machine de construction est appliqué à une machine de construction comprenant un moteur, une pompe hydraulique principale, une pompe pilote, un actionneur hydraulique, une valve de régulation, un levier d'actionnement et une valve de détente principale, et comprend : un premier capteur de pression située au niveau d'un passage d'écoulement entre la pompe hydraulique principale et la valve de détente principale pour détecter en temps réel une pression de consigne d'un système hydraulique pendant une détente et émet un signal de détection ; un second capteur de pression installé dans un passage d'écoulement entre la valve de détente principale et un réservoir hydraulique pour détecter en temps réel une pression côté sortie de la valve de détente principale pendant une détente et émet un signal de détection ; une valve de régulation proportionnelle électronique pour générer une pression pilote de façon à être proportionnelle ou inversement proportionnelle à un signal de régulation entrée pour régler une pression définie de la valve de détente principale et envoie la pression pilote générée vers la valve de détente principale ; et une unité de régulation pour émettre un signal de régulation, par le biais duquel la pression de consigne de la valve de détente principale peut être réglée de manière variable, vers la valve de régulation proportionnelle électronique conformément aux signaux de détection entrés en temps réel à partir du premier et du second capteur de pression.
PCT/KR2012/008439 2012-10-16 2012-10-16 Dispositif de régulation automatique de pression pour une machine de construction Ceased WO2014061834A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/KR2012/008439 WO2014061834A1 (fr) 2012-10-16 2012-10-16 Dispositif de régulation automatique de pression pour une machine de construction

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/KR2012/008439 WO2014061834A1 (fr) 2012-10-16 2012-10-16 Dispositif de régulation automatique de pression pour une machine de construction

Publications (1)

Publication Number Publication Date
WO2014061834A1 true WO2014061834A1 (fr) 2014-04-24

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PCT/KR2012/008439 Ceased WO2014061834A1 (fr) 2012-10-16 2012-10-16 Dispositif de régulation automatique de pression pour une machine de construction

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113390627A (zh) * 2021-06-30 2021-09-14 四川航天烽火伺服控制技术有限公司 一种减压阀离心过载试验装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR970059411A (ko) * 1996-01-08 1997-08-12 오까다 하지메 건설기계의 유압구동장치
JP2001050202A (ja) * 1999-08-09 2001-02-23 Hitachi Constr Mach Co Ltd 油圧作業機の油圧制御装置
JP2010151191A (ja) * 2008-12-24 2010-07-08 Hitachi Constr Mach Co Ltd 作業機械の油圧システム
KR20110057231A (ko) * 2008-09-12 2011-05-31 바스프 에스이 기하학적 촉매 성형체의 제조 방법
KR20110100285A (ko) * 2008-12-15 2011-09-09 두산인프라코어 주식회사 건설 기계의 유압펌프 유량 제어장치

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR970059411A (ko) * 1996-01-08 1997-08-12 오까다 하지메 건설기계의 유압구동장치
JP2001050202A (ja) * 1999-08-09 2001-02-23 Hitachi Constr Mach Co Ltd 油圧作業機の油圧制御装置
KR20110057231A (ko) * 2008-09-12 2011-05-31 바스프 에스이 기하학적 촉매 성형체의 제조 방법
KR20110100285A (ko) * 2008-12-15 2011-09-09 두산인프라코어 주식회사 건설 기계의 유압펌프 유량 제어장치
JP2010151191A (ja) * 2008-12-24 2010-07-08 Hitachi Constr Mach Co Ltd 作業機械の油圧システム

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113390627A (zh) * 2021-06-30 2021-09-14 四川航天烽火伺服控制技术有限公司 一种减压阀离心过载试验装置
CN113390627B (zh) * 2021-06-30 2022-11-15 四川航天烽火伺服控制技术有限公司 一种减压阀离心过载试验装置

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