Oil-pressure device
    81.
    发明公开
    Oil-pressure device 失效
    油压调节器

    公开(公告)号:EP0867567A2

    公开(公告)日:1998-09-30

    申请号:EP98100126.6

    申请日:1998-01-07

    IPC分类号: E02F9/22

    摘要: An oil-pressure cylinder in a crushing device is connected to a crushing jaw via a pivot shaft so that the crushing jaw can open and close. The extension of oil-pressure cylinder causes the crushing jaw to close and crush the object to be crushed. Oil-pressure cylinder has a piston with a greater pressure-receiving area on the head side than on the rod side. An acceleration valve serves to switch the extension/retraction operations of the oil-pressure cylinder. During a rod unloaded interval, beginning when the crushing jaw starts to close and ending when the crushing jaw comes into contact with the object to be crushed, the acceleration valve makes communication between a head-side port and a rod-side port in the cylinder continuous, while the oil path from the rod side to a tank is blocked. The oil from the rod side is made to flow to the head side. This speeds up the movement of the rod in the closing operation during the unloaded interval before the crushing jaw comes into contact with the object being held on a fixed jaw at which time communication of the head-side oil-port with the rod-side oil port is interrupted.

    METHOD AND VALVE APPARATUS FOR CONTROLLING A RECIPROCATABLE FLUID ACTATED POWER MACHINE
    82.
    发明公开
    METHOD AND VALVE APPARATUS FOR CONTROLLING A RECIPROCATABLE FLUID ACTATED POWER MACHINE 失效
    方法和一种用于控制阀门圆形和浮动液压驱动

    公开(公告)号:EP0853730A1

    公开(公告)日:1998-07-22

    申请号:EP95937253.0

    申请日:1995-10-02

    申请人: POS-LINE AB

    发明人: HARJU, Bert

    IPC分类号: F15B15 F15B11

    摘要: A method and an apparatus for controlling the function of all kinds of reciprocatable power machines which are actuated by means of a pneumatic, hydraulic of any other pressure fluid, irrespective if the machines are of rotary or axially operating type, in which the active power stroke is accomplished using full power of pressure fluid against a reciprocatable piston (2) in the active air pressure chamber (10, 12), and in which the reversing of the direction of operation is made by alternatingly supplying pressure fluid to the opposite air pressure chamber (12, 10) of the machine, said valve comprises a valve poppet (6) having several channels providing means (7) for alternatingly placing one of the pressure chambers (10, 12) of the reciprocatable fluid actuated machine (1, 2) under full pressure, means (8) for building up a certain counter pressure in a pressure chamber which is, at the actual moment, inactive, and means (9) for evacuating the pressure from an inactive pressure chamber of the fluid actuated machine.

    DRIVING DEVICE FOR A HYDRAULIC MOTOR
    83.
    发明公开
    DRIVING DEVICE FOR A HYDRAULIC MOTOR 失效
    ANTRIEBSVORRICHTUNGFÜREINEN HYDRAULISCHEN MOTOR

    公开(公告)号:EP0833062A4

    公开(公告)日:1998-07-01

    申请号:EP96906933

    申请日:1996-03-22

    摘要: A driving device for a hydraulic motor comprising a directional control valve (21) for supplying pressure oil discharged from a hydraulic pump (20) to a first port (25) or a second port (26) of a hydraulic motor (24) and returning oil returning from the second port or the first port to a tank (27) and a pilot pressure supplying valve (40) for controlling the directional control valve (21) wherein the directional control valve is of a pilot pressure selection type in which the valve is positioned, respectively, at a neutral position A by means of springs (32, 33), at a first position B by virtue of a pressure to a first pressure receiving portion (34), and at a second position C by virtue of a pressure to a second pressure receiving portion (35), wherein when the directional control valve is at the neutral position, the discharged pressure oil is supplied to the first and second ports via check valves (36, 37), when at the first position, the discharged pressure oil is supplied to the first port, while pressure oil at the second port is discharged therefrom into the tank, and when at the second position, the discharged pressure oil is supplied to the second port, while pressure oil at the second port is discharged therefrom into the tank, wherein the pilot pressure supplying valve is positioned at a neutral position F by means of springs (50, 51), and is switched to a first position G and a second position H by first and second drive means (52, 53), respectively, so as to supply pilot pressure to the first and second pressure receiving portions, and wherein when the pilot pressure supplying valve is positioned at the neutral position, the first and second pressure receiving portions communicate with the tank, when at the first position, the first port communicates with the first pressure receiving portion, while the second pressure receiving portion communicates with the tank and when at the second position, the second port communicates with the second pressure receiving portion, while the first pressure receiving portion communicates with the tank.

    摘要翻译: 一种液压马达驱动装置,包括用于将排出压力流体从液压泵(20)可控地供给到液压马达(24)的第一端口(25)或第二端口(26)的方向控制阀(21),以及 用于将所述液压流体从所述第二端口或所述第一端口可控地返回到箱体(27)中,以及用于控制所述方向控制阀的先导压力施加阀(40),并且所述方向控制阀为先导压力开关型 以弹簧(32,33)的中间位置A,在施加到其第一受压部分(34)的液压下使其第一位置B处于其第二位置C,并且在施加到其第二压力的液压下 接收部分(35); 当方向控制阀处于中立位置时,来自液压泵的排出压力流体经由单向阀(36,37)供给到液压马达的第一和第二端口; 当方向控制阀处于第一位置时,来自液压泵的排出压力流体被供应到所述液压马达的第一端口中,并且允许所述第二端口的液压流体流出到所述罐中; 当方向控制阀处于第二位置时,来自液压泵的排出压力流体被供给到液压马达的第二端口,并且允许第一端口的液压流体流出到储罐中; 先导压力施加阀适于用弹簧(50,52)取中空位置F,并且通过第一或第二驱动单元(52,53)将其第一或第二位置G或H切换到第一或第二位置, 对方向控制阀的第一或第二受压部施加先导压力; 当先导压力施加阀处于中立位置时,方向控制阀的第一和第二压力接收部分都与油箱流体连通; 液压马达的第一端口与方向控制阀的第一压力接收部分流体连通,并且当先导压力施加阀处于第一端口时,第二压力接收部分与油箱流体连通 位置; 并且液压马达的第二端口与方向控制阀的第二压力接收部分流体连通,并且当先导压力施加阀处于液压马达时,第一压力接收部分与油箱流体连通 第二名

    Hydraulic systems
    84.
    发明公开
    Hydraulic systems 失效
    液压系统

    公开(公告)号:EP0708250A3

    公开(公告)日:1998-05-20

    申请号:EP95307093

    申请日:1995-10-06

    摘要: An hydraulic lift system has an actuator (2) connected to an hydraulic circuit, having a pump (31), via a supply line (20). A balanced seated valve (50) is connected between the supply line (20) and a reservoir (33), the valve being controlled by a solenoid (51) and an electric drive unit (40). The drive unit (40) supplies a gradually increasing or decreasing voltage to the solenoid (51) to open or close the valve (50) gradually. The valve has a valve member (170) that is displaceable along its length and has a valve head (174) of frusto-conical shape. A passage (176) along the valve member (170) balances fluid pressure across the valve member. The solenoid (51) has an armature (160) with a pole face (161) that can be displaced towards a fixed pole face (167) to unseat the valve member (170). The pole faces (161 and 167) have complementary frusto-conical surfaces (163) and there is a non-magnetic washer (168) between them.

    摘要翻译: 液压提升系统具有经由供应管线20连接到具有泵31的液压回路的致动器2.平衡阀座50连接在供应管线20和储存器33之间,阀门由螺线管51控制 以及电驱动单元40.驱动单元40逐渐增加或减小电压到螺线管51以逐渐打开或关闭阀50。 阀具有可沿其长度移动的阀构件170,并具有截头圆锥形状的阀头174。 沿着阀构件170的通道176平衡阀构件上的流体压力。 螺线管51具有电枢160,其具有可以朝向固定极面167移动的极面161,以使阀构件170脱离。极面161和167具有互补的截头圆锥形表面163,并且存在非磁性垫圈 168之间。

    DRIVING DEVICE FOR A HYDRAULIC MOTOR
    85.
    发明公开
    DRIVING DEVICE FOR A HYDRAULIC MOTOR 失效
    液压马达驱动装置

    公开(公告)号:EP0833062A1

    公开(公告)日:1998-04-01

    申请号:EP96906933.5

    申请日:1996-03-22

    申请人: KOMATSU, LTD.

    IPC分类号: F15B11/00 F15B11/08

    摘要: A hydraulic motor driving apparatus which includes a directional control valve (21) for controlledly supplying a discharge pressure fluid from a hydraulic pump (20) into a first port (25) or a second port (26) of a hydraulic motor (24) and for controlledly returning the hydraulic fluid from the second or first port into a tank (27), and a pilot pressure applying valve (40) for controlling the directional control valve, and in which the directional control valve is of a pilot pressure switching type adapted to take its neutral position A with springs (32, 33), to take its first position B under a hydraulic pressure applied to its first pressure receiving portion (34) and to take its second position C under a hydraulic pressure applied to its second pressure receiving portion (35); the discharge pressure fluid from the hydraulic pump is supplied via a check valve (36, 37) into the first and second ports of the hydraulic motor when the directional control valve is at the neutral position; the discharge pressure fluid from the hydraulic pump is supplied into the first port of said hydraulic motor and a hydraulic pressure fluid of said second port is allowed to flow out thereof into the tank, when the directional control valve is at the first position; the discharge pressure fluid from the hydraulic pump is supplied into the second port of the hydraulic motor and a hydraulic pressure fluid of the first port is allowed to flow out thereof into the tank, when the directional control valve is at the second position; the pilot pressure applying valve is adapted to take its neutral position F with springs (50, 52) and to be switched to take its first or second position G or H with a first or second drive unit (52, 53), respectively, to apply a pilot pressure to the first or the second pressure receiving portion of the directional control valve; both of the first and second pressure receiving portions of the directional control valve are each brought into a fluid communication with the tank when the pilot pressure applying valve is at the neutral position; the first port of the hydraulic motor is brought into a fluid communication with the first pressure receiving portion of the directional control valve and the second pressure receiving portion is brought into a fluid communication with the tank, when the pilot pressure applying valve is at the first position; and the second port of the hydraulic motor is brought into a fluid communication with the second pressure receiving portion of the directional control valve and the first pressure receiving portion is brought into a fluid communication with the tank, when the pilot pressure applying valve is at the second position.

    摘要翻译: 1。一种液压马达驱动装置,其特征在于,具备:将来自液压泵(20)的排出压力流体向液压马达(24)的第一端口(25)或第二端口(26)进行控制供给的方向控制阀(21); ,用于将来自第二或第一端口的液压流体控制地返回到箱(27)中;以及先导压力施加阀(40),用于控制方向控制阀,并且其中方向控制阀是适合的先导压力开关类型 (32,33)的中间位置A在施加到其第一压力接收部分(34)的液压下处于其第一位置B并且在施加到其第二压力的液压下处于其第二位置C 接收部分(35); 当方向控制阀处于中立位置时,来自液压泵的排出压力流体通过止回阀(36,37)供给到液压马达的第一和第二端口; 当方向控制阀处于第一位置时,来自液压泵的排出压力流体被供给到所述液压马达的第一端口中,并且允许所述第二端口的液压流体流出到油箱中; 当方向控制阀处于第二位置时,来自液压泵的排出压力流体被供给到液压马达的第二端口中,并且允许第一端口的液压流体流出到液箱中; 先导压力施加阀适于利用弹簧(50,52)进入其中间位置F并且被切换成分别利用第一或第二驱动单元(52,53)将其第一或第二位置G或H带到 施加先导压力至方向控制阀的第一或第二压力接收部分; 当先导压力施加阀处于中间位置时,方向控制阀的第一和第二压力接收部均与槽流体连通; 当先导压力施加阀处于第一位置时,液压马达的第一端口与方向控制阀的第一压力接收部分流体连通并且第二压力接收部分与槽流体连通 位置; 并且当先导压力施加阀处于第一位置时,液压马达的第二端口与方向控制阀的第二压力接收部分流体连通并且第一压力接收部分与槽液体连通 第二位。

    Hydraulische Steuereinrichtung
    87.
    发明公开
    Hydraulische Steuereinrichtung 失效
    液压控制装置

    公开(公告)号:EP0823559A2

    公开(公告)日:1998-02-11

    申请号:EP97112410.2

    申请日:1997-07-19

    申请人: ROBERT BOSCH GMBH

    发明人: Loedige, Heinrich

    IPC分类号: F15B13/01 F15B11/05

    摘要: Es wird eine hydraulische Steuereinrichtung (10) vorgeschlagen, mit der eine lastkompensierte Volumenstromsteuerung beim Heben und Senken eines einfachwirkenden Motors (11) steuerbar ist. In einer Zulaufleitung (18) liegt ein erstes Zwei-Wege-Proportionaldrosselventil (19) und ein die Last absicherndes Rückschlagventil (21), während in einer Ablaufleitung (23) ein zweites Zwei-Wege-Proportionaldrosselventil (24) geschaltet ist, denen in einem gemeinsamen Leitungsabschnitt (26) eine Druckwaage (22) zugeordnet ist. Das erste Proportionaldrosselventil (19) liegt in einem Steuerkreis (31, 32, 35, 40) mit Wechselventil (34) und steuert die Umschaltung der Druckwaagensteuerung, so daß die Druckwaage (22) in beiden Stömungsrichtungen, also bei Heben und Senken, wirksam wird.

    摘要翻译: 它升高和降低一个单作用电动机(11)是可控制的过程中,提出了一种液压控制装置(10),带负载补偿的体积流量的控制。 在电源线(18)是同时在漏极线(23)的第二二通比例节流阀(24)连接的第一双向比例节流阀(19)和所述负载absicherndes检查阀(21),其在 压力补偿器(22)与共用管段(26)相关联。 第一比例节流阀(19)位于一个控制电路(31,32,35,40)与往复阀(34)和控制所述压力平衡控制的切换,使得压力平衡(22)是两个Stömungsrichtungen,即升高和降低有效的,当 ,

    Sperrventil mit Druckbegrenzung
    88.
    发明公开

    公开(公告)号:EP0816691A2

    公开(公告)日:1998-01-07

    申请号:EP97109617.7

    申请日:1997-06-13

    申请人: ROBERT BOSCH GMBH

    IPC分类号: F15B13/01 F15B20/00

    摘要: Die Erfindung betrifft ein Sperrventil, das in mindestens einem Verbraucherkanal eines mit einem Längsschieber ausgestatteten Wegeventils angeordnet ist und in Rückströmrichtung sperrt. Im Körper des Sperrventils sitzt ein ebenfalls in Rückströmrichtung sperrendes Hilfsventil, das zur Einleitung der verbraucherseitigen Verbraucherkanalentlastung über einen vom Längsschieber betätigten Stößel geöffnet wird. Im oder am Sperrventilkörper ist neben dem Hilfsventil ein Druckbegrenzungsventil angeordnet, daß dann öffnet, wenn im verbraucherseitigen Druckmittelstrang der erforderliche Arbeitsdruck um ein vorgegebenes Maß überschritten wird.

    摘要翻译: 截止阀在其主体中具有在后向流动方向上阻塞的辅助阀,其被打开用于通过从纵向滑块操作的推进器引入用户通道卸载。 在止动阀体(41)上或上方设置有限制阀,其在后方流动方向(9)开口。 截止阀在用户连接(25)的区域内设置在其壳体(11)内。 限流阀配置在与旁通阀平行的截止阀体内。 它作为附加部件并入至少一个阀体和由限压螺钉张紧的机械弹簧部件。