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    • 62. 发明申请
    • HYDRAULIC CONTROL DEVICE FOR SUPPLYING A PRESSURE MEANS TO PREFERABLY, SEVERAL HYDRAULIC CONSUMERS
    • 液控制系统在液压介质供应最好是几个液压消耗
    • WO01002736A1
    • 2001-01-11
    • PCT/EP2000/005988
    • 2000-06-28
    • F04B49/00F04B49/08F15B11/16E02F9/22
    • F15B11/163F04B49/002F04B49/08F04B2205/05F04B2205/061F04B2205/15F15B2211/20553F15B2211/255F15B2211/30535F15B2211/30555F15B2211/3111F15B2211/351F15B2211/50518F15B2211/5159F15B2211/55F15B2211/6054F15B2211/6055F15B2211/65F15B2211/71
    • The invention relates to a control device for supplying a pressure means to preferably, several hydraulic consumers. Said control device has a load-sensing-regulated variable displacement pump (10) whose setting can be varied according to the highest load pressure of the hydraulic consumers being activated, by means of an LS pump regulating valve (27); proportionally adjustable directional-control valves (38), which are situated between a supply line (12) extending from the displacement pump, a discharge line (63) leading to a tank (11), and the hydraulic consumers; and a load indicator line (26), through which the LS pump regulating valve can be subjected to the highest load pressure of the hydraulic consumers being activated at the same time. A control device of this type sometimes lacks the desired dynamics. The aim of the invention is therefor to further develop the known hydraulic control device in such a way that the displacement pump can continue to operate in an energy-saving manner with the usual LS behavior but if desired, can also operate with greater dynamics. To this end, arbitrarily switchable valve elements (60, 61) are provided. Said valve elements can be switched into a mode in which a pressure can be built up in the load indicating line from the supply line, by means of said valve elements.
    • 本发明涉及的控制装置,其用于优选多个液压消费者和需求进料调节(负载传感控制)可变排量泵(10),调整的压力介质供给(如通过LS泵控制阀上的致动液压负载的最高负载压力的功能 27)是由可变进料管线12),一个可变比例调节方向控制阀(38)(一个输出之间(为一个罐11),从而导致漏极线(63)和液压负载和负载感测线(26),通过该LS -Pumpenregelventil通过同时致动的液压负载的最高负荷压力作用于。 这样的控制装置有时不具有所希望的动态特性。 因此,目标是进一步发展,该可变排量泵可以以节能的方式与通常的LS行为来操作确实继续已知的液压控制装置,但是,如果需要,也可以操作具有更高的动力学是可能的。 这是通过随机可切换阀装置(60,61)都存在,其可被带入其中通过阀从在负载传感线入口管所述装置的开关状态来实现,一个压力可被建立。
    • 70. 发明申请
    • HYDRAULIC DRIVE DEVICE AND DIRECTION SWITCHOVER VALVE FOR HYDRAULIC MACHINE
    • 液压驱动装置和方向开关阀液压机
    • WO9838429A9
    • 1999-04-22
    • PCT/JP9800781
    • 1998-02-26
    • HITACHI CONSTRUCTION MACHINERYSUGIYAMA GENROKUHIRATA TOICHITOYOOKA TSUKASA
    • SUGIYAMA GENROKUHIRATA TOICHITOYOOKA TSUKASA
    • E02F9/22F15B11/00F15B11/05
    • E02F9/2225E02F9/2285E02F9/2296F15B11/05F15B2211/30525F15B2211/3111F15B2211/329F15B2211/40515F15B2211/41563F15B2211/428F15B2211/45F15B2211/50527F15B2211/5159
    • A hydraulic drive device which has a closed center type direction switching valve (2) which is connected to a hydraulic pump (50) through a pressure oil feed passage (3) to control flow of a pressure oil fed to an actuator (51). The hydraulic drive device comprises a throttle shutoff means (11) provided on an unload circuit (10), which connects the pressure oil feed passage (3) to a tank (53), for throttling and shutting off the unload circuit (10) in accordance with a control input of the direction switching valve (2), the throttle shutoff means comprising a logic valve (12) having a feedback slit (12b), of which opening area is increased or decreased in accordance with an amount of movement of a valve disc (12a), and a pilot variable throttle (13) for controlling an amount of pilot flow passing through the feedback slit (12b) in accordance with a control input of the direction switching valve (2). Accordingly, the closed center type direction switching valve is shortened in axial length of a spool of the direction switching valve as compared with an open center type direction switching valve, achieves an improvement in working accuracy and compactness, and can function in an equivalent manner to an open center type direction switching valve without the use of any controller.
    • 一种液压驱动装置,其具有封闭的中心型方向切换阀(2),其通过压力油供给通路(3)连接到液压泵(50),以控制供给到致动器(51)的压力油的流量。 液压驱动装置包括设置在卸载回路(10)上的节气门关闭装置(11),其将压力供油通道(3)连接到箱(53),用于节流和关闭卸载回路(10) 根据方向切换阀(2)的控制输入,节气门关闭装置包括具有反馈狭缝(12b)的逻辑阀(12),其中开口面积根据a的移动量而增大或减小 以及根据方向切换阀(2)的控制输入来控制通过反馈狭缝(12b)的先导流量的先导可变节流阀(13)。 因此,与开式中心型方向切换阀相比,封闭的中心型方向切换阀在方向切换阀的阀芯的轴向长度上缩短,实现了加工精度和紧凑性的提高,能够以相当于 开式中心型方向切换阀,不使用任何控制器。