WO2016035902A1 - Appareil de commande de la tourelle d'un engin de chantier et son procédé de commande - Google Patents

Appareil de commande de la tourelle d'un engin de chantier et son procédé de commande Download PDF

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Publication number
WO2016035902A1
WO2016035902A1 PCT/KR2014/008194 KR2014008194W WO2016035902A1 WO 2016035902 A1 WO2016035902 A1 WO 2016035902A1 KR 2014008194 W KR2014008194 W KR 2014008194W WO 2016035902 A1 WO2016035902 A1 WO 2016035902A1
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WO
WIPO (PCT)
Prior art keywords
swing
control valve
relief
pressure
valve
Prior art date
Application number
PCT/KR2014/008194
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English (en)
Korean (ko)
Inventor
이춘한
Original Assignee
볼보 컨스트럭션 이큅먼트 에이비
이춘한
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, 이춘한 filed Critical 볼보 컨스트럭션 이큅먼트 에이비
Priority to PCT/KR2014/008194 priority Critical patent/WO2016035902A1/fr
Publication of WO2016035902A1 publication Critical patent/WO2016035902A1/fr

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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
    • E02F9/08—Superstructures; Supports for superstructures
    • E02F9/10—Supports for movable superstructures mounted on travelling or walking gears or on other superstructures
    • E02F9/12—Slewing or traversing gears

Definitions

  • the present invention relates to a swing control device and a control method thereof, and more particularly, to a swing control device for a construction machine and a control method thereof for reducing flow loss due to reverse driving during swing operation.
  • the electric joystick outputs an operation signal proportional to the joystick operation amount by the driver, and the controller is proportional to the joystick and travel pedal operation amount in accordance with the input of the operation signal.
  • the electrical signal is output to the electronic proportional control valve. Since the main control valve is switched by the pilot pressure applied from the electromagnetic proportional control valve to operate the working device of the boom, the arm and the bucket, it is possible to perform an excavation work.
  • the hydraulic oil of the hydraulic pump is supplied to the discharge side of the swing motor to quickly turn the swing motion. You can stop it.
  • the present invention is to solve the above-described problems, when the reverse drive signal is input during the turning of the upper swing structure, the turning control of the construction machine to reduce the flow loss while stopping the turning operation quickly
  • An object of the present invention is to provide an apparatus and a control method thereof.
  • a swing motor driven by the hydraulic oil of the hydraulic pump to pivot the upper swing body
  • a swing control valve installed in a flow path between the hydraulic pump and the swing motor and controlling the driving of the swing motor during switching
  • a variable swing relief valve capable of setting the relief pressure of the swing motor to a first relief pressure and a second relief pressure higher than the first relief pressure
  • a first control valve configured to switch by applying a pilot pressure of the pilot pump
  • It is installed in the flow path between the pilot pump and the swing relief valve, and is switched when the electrical signal is applied to reversely drive the swing motor by the operation of the operating lever, and during the switching, the set pressure of the swing relief valve is changed to the second relief.
  • It provides a swing control device for a construction machine, comprising; a second control valve for converting to pressure.
  • Hydraulic pump A swing motor driven by the hydraulic oil of the hydraulic pump; A swing control valve for controlling driving of the swing motor; An operation lever for outputting an electrical signal corresponding to the operation amount;
  • a variable swing relief valve for variably controlling the relief pressure of the swing motor:
  • the set pressure of the swing relief valve is changed to the second relief pressure, and the supply of the hydraulic oil of the hydraulic pump to the swing motor is interrupted by switching the swing control valve.
  • the step of switching the set pressure of the relief valve to the first relief pressure and supplying the hydraulic oil of the hydraulic pump to the swing motor provides a swing control method for a construction machine comprising a.
  • the set pressure of the swing relief valve is switched to the first relief pressure, and the swing control valve is switched by operating the operating lever to operate the hydraulic oil of the hydraulic pump. And supplying the swing motor.
  • the first control valve is a first control valve
  • a solenoid valve which is switched to an initial state in which the swing control valve is maintained in a neutral state, and switched on to switch the swing control valve to supply hydraulic oil of the hydraulic pump to the swing motor when an electrical signal is applied from the controller. It is characterized in that it is used.
  • an electrical signal is applied to the second control valve to convert the set pressure of the swing relief valve to the second relief pressure, and the hydraulic pump And a controller for cutting off an electrical signal applied to the first control valve to cut off the hydraulic oil supplied to the swing motor from.
  • the electric signal applied to the second control valve is cut off to switch the set pressure of the swing relief valve to the first relief pressure,
  • a controller for applying an electrical signal to the first control valve so as to switch the swing control valve to supply hydraulic oil of the hydraulic pump to the swing motor.
  • the first control valve and the second control valve are connected to The first control valve and the second control valve
  • the electronic proportional control valve is used to convert the pilot pressure supplied from the pilot pump to correspond to the electrical signal applied from the controller to apply the converted pilot pressure to the swing control valve and the swing relief valve. .
  • the present invention having the above-described configuration, when the inverted drive signal is input during the turning of the upper swing body, by stopping the turning operation quickly, the workability can be increased, and the flow rate loss can be improved to improve the fuel economy of the engine. It works.
  • FIG. 1 is a hydraulic circuit diagram for explaining the normal driving of the swing motor in the swing control device of a construction machine according to an embodiment of the present invention
  • FIG. 2 is a hydraulic circuit diagram for explaining a neutral state for the reverse drive of the swing motor in the swing control device of a construction machine according to an embodiment of the present invention
  • FIG. 3 is a flow chart showing a swing control method of a construction machine according to an embodiment of the present invention.
  • FIG. 1 is a hydraulic circuit diagram for explaining the normal driving of the swing motor in the swing control device of a construction machine according to an embodiment of the present invention
  • Figure 2 is a swing control device of a construction machine according to an embodiment of the present invention
  • Figure 3 is a flow chart showing a swing control method of a construction machine according to an embodiment of the present invention.
  • the swing control device of the construction machine according to an embodiment of the present invention, a swing motor for turning the upper swing body 20 with respect to the lower traveling body (not shown) 30 is connected to a variable displacement hydraulic pump 10 (hereinafter referred to as a "hydraulic pump").
  • a variable displacement hydraulic pump 10 hereinafter referred to as a "hydraulic pump”
  • operation lever 50 When operating the electric operation lever 50 (hereinafter referred to as “operation lever”), when the pilot pressure supplied from the pilot pump (not shown) is applied and switched, forward rotation, stop and reverse of the turning motor 30 are performed.
  • a swing control valve 40 for controlling the rotational drive is installed in the flow path between the hydraulic pump 10 and the swing motor 30.
  • a variable swing relief valve 60 that variably controls the relief pressure of the swing motor 30 connects the shuttle valve 100 (the flow paths a and b between the swing control valve 40 and the swing motor 30 in parallel). Is installed in the parallel flow path (c)) and the drain flow path (d) between the hydraulic oil tank (T).
  • the swing relief valve 60 is a two-stage relief valve that can be set to a first relief pressure in a low pressure state and a second relief pressure in a high pressure state higher than the first relief pressure.
  • the controller 70 is provided with an electrical signal inputted by the manipulation lever 50.
  • the controller 70 is electrically connected to the second control valve 90 to invert the driving motor of the swing motor 30.
  • the opening pressure of the swing relief valve 60 is controlled by the pilot pressure supplied from the pilot pump to convert a set pressure into the second relief pressure on the high pressure side, and the hydraulic pressure supplied to the swing motor 30.
  • the electric signals applied to the first control valves 80a and 80b are cut off.
  • controller 70 is applied to the second control valve 90 so that the set pressure of the swing relief valve 60 is converted to the low pressure side first relief pressure to drive the swing motor 30 in the normal state.
  • the electrical signal corresponding to the operation amount of the operation lever 50 is supplied to the first control valves 80a and 80b to block the electrical signal to be supplied and to supply hydraulic oil of the hydraulic pump 10 to the swing motor 30. Will be authorized.
  • the first control valve (80a, 80b) and the second control valve 90 is
  • the pilot pressure supplied from the pilot pump (not shown) is converted to correspond to the electrical signal applied from the controller 70 to apply the converted pilot pressure to the swing control valve 40 and the swing relief valve 60.
  • Electronic proportional control valve can be used.
  • the first control valve (80a, 80b) is
  • the turning control valve 40 to maintain the neutral state and the turning control for supplying the hydraulic oil of the hydraulic pump 10 to the turning motor 30 when an electrical signal is applied from the controller 70
  • a solenoid valve switched on can be used to switch the valve 40.
  • the swing relief valve 60 is
  • An initial state to maintain the first relief pressure and a solenoid valve that is switched on to convert the set pressure of the swing relief valve 60 to the second relief pressure upon application of an electrical signal from the controller 70 are used. Can be.
  • the swing control method of a construction machine a hydraulic pump (10); A swing motor 30 driven by the hydraulic oil of the hydraulic pump 10 to pivot the upper swing body 20 with respect to the lower travel body; A swing control valve (40) installed in the flow path between the hydraulic pump (10) and the swing motor (30) and controlling the driving of the swing motor (30) during switching; An operation lever 50 for outputting an electric signal corresponding to the operation amount; A variable swing relief valve 60 for controlling the relief pressure of the swing motor 30;
  • a controller 70 for inputting an electrical signal by the operation of the operation lever 50:
  • the set pressure of the swing relief valve 60 is set to the second.
  • the first control valve 80a applies the pilot pressure supplied from the pilot pump.
  • the converted pilot pressure is applied to the right signal pressure port of the swing control valve 40 by converting the corresponding electrical signal.
  • the hydraulic oil of the hydraulic pump 10 is transferred to the swing motor 30 via the swing control valve 40 and the flow path b. It is supplied to drive the upper swing body 20 in the direction of the arrow (counterclockwise).
  • the hydraulic oil discharged from the swing motor 30 is returned to the hydraulic oil tank T via the flow path a and the swing control valve 40.
  • an electrical signal is applied from the controller 70 to the first control valve 80b by the operation of the operation lever 50, and the first control valve ( 80b) converts the pilot pressure supplied from the pilot pump to correspond to the applied electric signal to apply the converted pilot pressure to the left signal pressure port of the swing control valve 40.
  • the hydraulic oil of the hydraulic pump 10 is supplied to the swing motor 30 via the swing control valve 40 and the flow path a switched in the right direction to pivot the upper swing body 20.
  • the hydraulic fluid moved from the branch point of the flow path a and the parallel flow path c to the drain flow path d through the shuttle valve 100 is controlled by the relief pressure of the swing relief valve 60. That is, when the hydraulic oil pressure moved to the drain flow path (d) exceeds the high pressure side second relief pressure of the swing relief valve 60, it is returned to the hydraulic oil tank (T) (the swing relief valve 60 is the first 2 is converted to the high pressure side second relief pressure by the pilot pressure applied from the control valve 90).
  • the opening pressure of the swing relief valve 60 is changed because the set pressure of the swing relief valve 60 is converted to the second relief pressure by the pilot pressure applied from the second control valve 90. Will be reduced.
  • the discharge side hydraulic oil pressure of the swing motor 30 is set to the second relief pressure of the swing relief valve 60.
  • the braking force for reducing the rotation of the upper swing body 20 rotated by the inertia force may be increased, thereby reducing the braking time of the upper swing body 30.
  • the pilot pressure applied to the swing control valve 40 from the first control valve (80a, 80b) is cut off when the swing motor 30 is inverted, so the swing control valve 40 is neutral. State is maintained (shown in FIG. 2). Therefore, the supply of hydraulic oil to the swing motor 30 can be cut off from the hydraulic pump 10 via the swing control valve 40 and the flow path a.
  • the set pressure of the swing relief valve 60 is increased to an arbitrary value to reduce the opening cross section, so that the swing motor is reduced.
  • the hydraulic fluid discharged from the hydraulic oil tank (T) through the turning relief valve 60 from 30 is reduced. That is, in the reverse driving condition of the swing motor 30, the braking force may be increased to quickly stop the swing operation of the upper swing body 20.
  • the upper swing structure can be applied to a construction machine such as an excavator having a swing device capable of turning the lower swing body.

Abstract

Cette invention concerne un appareil pour de commande de la tourelle d'un engin de chantier d'une machine de construction afin de réduire les pertes de charge par la commande d'inversion au cours du fonctionnement de la tourelle. L'invention concerne en outre un procédé de commande dudit appareil. Ledit appareil de commande de la tourelle d'un engin de chantier comprend : une pompe hydraulique et une pompe pilote ; un moteur de tourelle pour faire pivoter un corps de tourelle supérieur ; une soupape de commande de tourelle pour commander l'entraînement du moteur de tourelle après commutation ; un levier d'actionnement ; une soupape de sûreté variable de tourelle pour régler une pression de décharge du moteur de tourelle en tant que première pression de décharge et une seconde pression de décharge qui est supérieure à la première pression de décharge ; une première soupape de commande qui est activée par l'application d'un signal électrique pour fournir sélectivement de l'huile de fonctionnement de la pompe hydraulique vers le moteur de tourelle par actionnement du levier de commande, et qui applique la pression pilote de la pompe pilote à la soupape de commande de tourelle à des fins de commutation ; et une seconde soupape de commande qui est activée par l'application d'un signal électrique de sorte à entraîner en sens inverse le moteur tourelle par actionnement du levier de commande, et qui fait passer la pression de consigne de la soupape de sûreté de tourelle à la seconde pression de décharge à des fins de commutation.
PCT/KR2014/008194 2014-09-02 2014-09-02 Appareil de commande de la tourelle d'un engin de chantier et son procédé de commande WO2016035902A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/KR2014/008194 WO2016035902A1 (fr) 2014-09-02 2014-09-02 Appareil de commande de la tourelle d'un engin de chantier et son procédé de commande

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/KR2014/008194 WO2016035902A1 (fr) 2014-09-02 2014-09-02 Appareil de commande de la tourelle d'un engin de chantier et son procédé de commande

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WO2016035902A1 true WO2016035902A1 (fr) 2016-03-10

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110050113A (zh) * 2016-12-16 2019-07-23 卡特彼勒公司 具有提供三个风扇电动机操作位置的电动液压阀的风扇控制系统
CN113175462A (zh) * 2021-04-29 2021-07-27 三一重机有限公司 一种液压挖掘机回转马达测试系统及方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000161305A (ja) * 1990-04-16 2000-06-13 Yutani Heavy Ind Ltd 油圧作業機の旋回制御方法
JP2000266006A (ja) * 1999-03-15 2000-09-26 Komatsu Ltd 旋回制御装置
KR101164669B1 (ko) * 2004-06-17 2012-07-11 두산인프라코어 주식회사 건설중장비의 선회제어장치 및 방법
KR101189632B1 (ko) * 2008-03-31 2012-10-11 가부시키가이샤 고마쓰 세이사쿠쇼 건설 기계의 선회 구동 제어 시스템
EP2644785A1 (fr) * 2012-03-30 2013-10-02 Sumitomo (S.H.I.) Construction Machinery Co., Ltd. Appareil de commande de rotation

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000161305A (ja) * 1990-04-16 2000-06-13 Yutani Heavy Ind Ltd 油圧作業機の旋回制御方法
JP2000266006A (ja) * 1999-03-15 2000-09-26 Komatsu Ltd 旋回制御装置
KR101164669B1 (ko) * 2004-06-17 2012-07-11 두산인프라코어 주식회사 건설중장비의 선회제어장치 및 방법
KR101189632B1 (ko) * 2008-03-31 2012-10-11 가부시키가이샤 고마쓰 세이사쿠쇼 건설 기계의 선회 구동 제어 시스템
EP2644785A1 (fr) * 2012-03-30 2013-10-02 Sumitomo (S.H.I.) Construction Machinery Co., Ltd. Appareil de commande de rotation

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110050113A (zh) * 2016-12-16 2019-07-23 卡特彼勒公司 具有提供三个风扇电动机操作位置的电动液压阀的风扇控制系统
CN110050113B (zh) * 2016-12-16 2021-12-07 卡特彼勒公司 具有提供三个风扇电动机操作位置的电动液压阀的风扇控制系统
CN113175462A (zh) * 2021-04-29 2021-07-27 三一重机有限公司 一种液压挖掘机回转马达测试系统及方法

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