Hydraulic section for load sensing applications and multiple hydraulic distributor
    15.
    发明公开
    Hydraulic section for load sensing applications and multiple hydraulic distributor 有权
    HydraulikteilfürLastmessungsanwendungen und Hydraulischer Mehrfachverteiler

    公开(公告)号:EP2918853A1

    公开(公告)日:2015-09-16

    申请号:EP14158991.1

    申请日:2014-03-11

    IPC分类号: F15B13/04

    摘要: Hydraulic section (1) for use in a hydraulic distributor (10), comprising:
    a valve body (2);
    a main spool (3);
    pressure compensator (5) housed in a first hole in the valve body (2);
    a piston (11) housed in the first hole;
    an intermediate chamber (16) in fluid communication with the feed line (Pal), the intermediate chamber (16) extending at least partially in the first hole and being delimited by the rod (12) of the piston (11);
    two limiters (6, 7) and a drainage channel (18) pertaining to the intermediate chamber (16) for altering the pressure thereof and close the compensator (5).

    摘要翻译: 一种用于液压分配器(10)的液压部分(1),包括:阀体(2); 主阀芯(3); 压力补偿器(5),容纳在阀体(2)中的第一孔中; 容纳在所述第一孔中的活塞(11) 与所述进料管线(Pal)流体连通的中间室(16),所述中间室(16)至少部分地延伸到所述第一孔中并且由所述活塞(11)的所述杆(12)限定; 两个限制器(6,7)和与中间室(16)相关的排水通道(18),用于改变其压力并关闭补偿器(5)。

    CONSTRUCTION MACHINE
    16.
    发明公开
    CONSTRUCTION MACHINE 有权
    施工机械

    公开(公告)号:EP2787127A1

    公开(公告)日:2014-10-08

    申请号:EP12853871.7

    申请日:2012-11-19

    摘要: A control pressure switching valve (57) is disposed between a displacement regulator (26) and a pressure control valve (44). The control pressure switching valve (57) is switched between a control position (j), in which a load sensing control pressure (PLS) is permitted to be outputted from the pressure control valve (44) to the displacement regulator (26), and a control release position (k), in which the load sensing control pressure (PLS) to be outputted to the displacement regulator (26) is reduced to a prescribed low pressure value. When the regeneration of a filter (19) is determined to be necessary, the controller (61) switches the control pressure switching valve (57) to the control release position (k). When the load sensing control pressure (PLS) is reduced to the low pressure value with the control pressure switching valve (57) switched to the control release position (k), the displacement regulator (26) increases a delivery displacement of a hydraulic pump (13), thereby increasing rotational load of an engine (10).

    摘要翻译: 控制压力开关阀(57)设置在位移调节器(26)和压力控制阀(44)之间。 控制压力切换阀57在允许从压力控制阀44输出负载传感控制压力PLS的控制位置j与位移调节器26之间切换, 控制释放位置(k),其中要输出到位移调节器(26)的负载传感控制压力(PLS)被减小到规定的低压值。 当确定过滤器(19)的再生需要时,控制器(61)将控制压力开关阀(57)切换到控制释放位置(k)。 当控制压力切换阀(57)切换到控制释放位置(k)时负载传感控制压力(PLS)降低到低压值时,位移调节器(26)增加液压泵 由此增加发动机(10)的旋转负载。

    CONTROL SYSTEM FOR OPERATING WORK DEVICE FOR CONSTRUCTION MACHINE
    17.
    发明公开
    CONTROL SYSTEM FOR OPERATING WORK DEVICE FOR CONSTRUCTION MACHINE 审中-公开
    STEUERUNGSSYSTEM ZUM BETRIEB EINER ARBEITSVORRICHTUNGFÜREINE BAUMASCHINE

    公开(公告)号:EP2772653A1

    公开(公告)日:2014-09-03

    申请号:EP11873593.5

    申请日:2011-10-07

    IPC分类号: F15B13/043 E02F9/22 F15B13/02

    摘要: Disclosed is a control system for controlling flow so as to allow simultaneous usage of a parallel flow path and a tandem flow path thereby reducing loss of pressure inside a control valve, when simultaneously operating work devices having different operating pressures. A control system for operating the work device, according to the present invention, provides the control system for operating the work device for a construction machine, comprising: first and second hydraulic pumps that are connected to an engine; a revolution control valve, an arm control valve, and a left driving control valve, which are installed on a first center bypass path of the first hydraulic pump, and each of which is connected via the parallel flow path; a boom control valve, a bucket control valve, and a right driving valve, which are installed on a second center bypass path of the second hydraulic pump, and each of which is connected via the parallel flow path; a pressure generation device; a bleed flow path, which is formed on a control spool at a lower side of a boom of the boom control valve, for maintaining an open state of the second center bypass path without closing same, when the boom control valve is switched so as to lower the boom; and a center bypass switch valve, which is installed on the lowermost side of the second center bypass path and is switched by means of a control signal for switching the boom control valve.

    摘要翻译: 公开了一种用于控制流动的控制系统,以便当同时操作具有不同操作压力的工作装置时,允许同时使用并联流动路径和串联流动路径,从而减少控制阀内部的压力损失。 根据本发明的用于操作工作装置的控制系统提供了用于操作建筑机械的作业装置的控制系统,包括:连接到发动机的第一和第二液压泵; 旋转控制阀,臂控制阀和左驱动控制阀,其安装在第一液压泵的第一中心旁路上,并且各自经由并联流路连接; 悬臂控制阀,铲斗控制阀和右驱动阀,其安装在第二液压泵的第二中心旁路上,并且各自经由并联流路连接; 压力发生装置; 排气流路,其形成在动臂控制阀的动臂的下侧的控制阀芯上,用于保持第二中心旁通路径的打开状态而不关闭,当动臂控制阀被切换时, 降低繁荣 以及中心旁路切换阀,其安装在第二中心旁路路径的最下侧,并且通过用于切换悬臂控制阀的控制信号而切换。

    Système hydraulique pour véhicule à détection de charge
    18.
    发明公开
    Système hydraulique pour véhicule à détection de charge 有权
    Loadsensing-Hydrauliksystemfürein Fahrzeug

    公开(公告)号:EP2679833A1

    公开(公告)日:2014-01-01

    申请号:EP12174365.2

    申请日:2012-06-29

    IPC分类号: F15B11/05

    摘要: Système hydraulique comportant :
    - un dispositif restricteur de débit (LS) disposé dans un canal de pression (10, 10'), entre une pompe (1) à débit variable et un récepteur hydraulique (R), ledit dispositif restricteur étant réglé à la valeur de commande dudit récepteur hydraulique,
    - un canal de régulation (20, 20') permettant de transmettre la pression de charge réelle (Pu) du récepteur hydraulique à un dispositif de commande (C) taré à une valeur de pression et ajustant la pression de refoulement de la pompe en fonction de ladite pression de charge et de ladite pression de tarage,
    - un dispositif correcteur (A) configuré pour commander le dispositif de commande avec une pression de charge (Pu2) différente de la pression de charge réelle du récepteur hydraulique, ledit dispositif correcteur consistant en un distributeur avec tiroir de manoeuvre (30) à deux positions et ressort de tarage (310), ledit distributeur comportant au moins un orifice de sortie (S) relié au dispositif de commande par le canal de régulation,
    dans lequel
    - une première extrémité (31) du tiroir de manoeuvre est soumise à la pression (Pu) au niveau de l'orifice de sortie du dispositif restricteur de débit et à la pression du ressort de tarage (310),
    - une seconde extrémité (32) du tiroir de manoeuvre est soumise à la pression (P LS ) au niveau de l'orifice d'entrée du dispositif restricteur de débit.

    摘要翻译: 该系统具有布置在例如可变流量泵(P)和液压接收器(R)之间的压力通道(10)中的限流装置(LS)。 液压马达。 校正装置(A)具有包括操作滑块(30)的分配器,其操作滑块(30)的第一端(31)在限流装置的出口处受到实际负载压力(Pu)和校准弹簧 (310)和第二端(32)在限流装置的入口处经受压力(Pls)。 校正装置以与实际压力不同的负载压力(Pu2)来控制控制装置(C)。