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    • 1. 发明申请
    • METHOD TO DETECT HYDRAULIC VALVE FAILURE IN HYDRAULIC SYSTEM
    • 检测液压系统液压阀故障的方法
    • WO2014172704A1
    • 2014-10-23
    • PCT/US2014/034797
    • 2014-04-21
    • PARKER-HANNIFIN CORPORATION
    • GOMM, RalphJOSEFSSON, Christian
    • F15B19/00
    • F15B11/003F15B20/008F15B2211/20515F15B2211/20561F15B2211/27F15B2211/30515F15B2211/6309F15B2211/6313F15B2211/633F15B2211/6346F15B2211/6651F15B2211/8636
    • According to one aspect of the invention, a hydraulic system includes a controller connected to an operator interface, a pump operable in a first direction for supplying pressurized fluid, and a load-holding valve connected between the pump and a port for connection to an actuator. The load-holding valve may be controlled by the controller and operative in a first position to allow flow to the actuator to operate the actuator against a load and operative in a second position to block load-induced return flow from the actuator to the pump. The controller may be configured to receive a requested actuator stop, to control the first valve to move to the second position in response to the requested actuator stop, to monitor a first system condition in response to the requested actuator stop, to evaluate the monitored system condition with a prescribed criteria, and to determine whether or not to initiate a back-up control routine based on the evaluation.
    • 根据本发明的一个方面,液压系统包括连接到操作者界面的控制器,可在第一方向上操作以供应加压流体的泵和连接在泵与用于连接到致动器的端口之间的负载保持阀 。 负载保持阀可以由控制器控制并且在第一位置中操作以允许流动到致动器以使操作器抵抗负载并且在第二位置操作以阻止来自致动器到泵的负载引起的返回流。 控制器可以被配置为接收所请求的致动器止动件,以响应于所请求的致动器停止来控制第一阀移动到第二位置,以响应于所请求的致动器停止来监视第一系统状况,以评估所监视的系统 条件,并且基于评估来确定是否启动备份控制例程。
    • 5. 发明申请
    • A VALVE ASSEMBLY AND A HYDRAULIC ACTUATOR COMPRISING THE VALVE ASSEMBLY
    • 阀组件和包括阀组件的液压执行器
    • WO2008095498A1
    • 2008-08-14
    • PCT/DK2008/000060
    • 2008-02-07
    • SAUER-DANFOSS APSNIELSEN, Brian
    • NIELSEN, Brian
    • F15B20/00B62D5/08F16H61/42
    • F15B11/003F15B11/006F15B20/002F15B20/008F15B2211/30505F15B2211/30575F15B2211/328F15B2211/6333F15B2211/6652F15B2211/6656F16H61/433
    • A valve assembly (2) forming a bridge circuit and a hydraulic actuator comprising at least one valve assembly (2) are disclosed. The valve assembly (2) is fluidly connectable between a fluid source (3) and a fluid drain (4). The valve assembly (2) comprises a first valve (8) fluidly connected between the fluid source (3) and a first diagonal point (12) of the bridge circuit, a second valve (9) fluidly connected between the fluid source (3) and a second diagonal point (13) of the bridge circuit, a third valve (10) fluidly connected between the first diagonal point (12) and the fluid drain (4), and a fourth valve (11) fluidly connected between the second diagonal point (13) and the fluid drain (4). The valves (8, 9, 10, 11) are such that in the case of a power cut off, flows of fluid away from the diagonal points (12, 13) are prevented. Thereby a hydraulic servomotor (5) connected across the diagonal points (12, 13) will be hydraulically locked in its instantaneous position, and a safety feature is accordingly provided. The first valve (8) and the second valve (9) are furthermore of a kind which is closed in an energized state. Thereby it is possible to control the valve assembly (2) in such a manner that a piston member (14) of a servomotor (5) connected across the diagonal points (12, 13) can be moved at a high velocity, thereby providing a servomotor (5) having a quick response time.
    • 公开了形成桥接电路的阀组件(2)和包括至少一个阀组件(2)的液压致动器。 阀组件(2)可流体地连接在流体源(3)和流体排放口(4)之间。 阀组件(2)包括流体连接在流体源(3)和桥接电路的第一对角线点(12)之间的第一阀(8),流体连接在流体源(3)之间的第二阀(9) 和桥接电路的第二对角点(13),流体连接在第一对角点(12)和流体排放口(4)之间的第三阀(10)和流体连接在第二对角线 点(13)和流体排出口(4)。 阀(8,9,10,11)使得在断电的情况下,防止流体离开对角线点(12,13)。 由此,连接在对角点(12,13)上的液压伺服电动机(5)将被液压地锁定在其瞬时位置,并且因此提供安全特征。 此外,第一阀(8)和第二阀(9)处于通电状态下是闭合的。 因此,可以以这样的方式控制阀组件(2),使得能够以高速度移动跨越对角线点(12,13)的伺服电动机(5)的活塞构件(14),从而提供 伺服电机(5)具有快速响应时间。
    • 6. 发明申请
    • CONTROL SYSTEM FOR A HYDRAULIC ELEMENT
    • 控制系统的液压元
    • WO2008012082A3
    • 2008-06-05
    • PCT/EP2007006604
    • 2007-07-25
    • AROS HYDRAULIK
    • TRETSCH ADOLF
    • F15B15/26
    • F15B15/261F15B11/003F15B2211/50545F15B2211/5059F16K17/285F16K17/30Y10T137/7837
    • In the case of a control system for a hydraulic element (14) which, under the pressure of hydraulic fluid in a locking pressure space (16) on one side of the hydraulic element (14) enters into an unlocking pressure space (13) on the other side of the hydraulic element (14), wherein the two pressure spaces (13, 16) are connected via a respective line (19) and (20) to the same main line (3, 4), a pressure-regulating valve (18) is to be connected into the line (19) to the unlocking pressure space (13), preventing the fluid from flowing back out of the unlocking pressure space (13). Furthermore, a pressure-compensating valve (21) is to be connected into the line (20) to the locking pressure space (16).
    • 在用于液压元件(14),其在对其它液压元件(14),两个压力腔室的解锁(13)的压力流体在上液压元件(14)的一侧上的锁定压力空间(16)中的压力下后退的控制系统(13 ,16)通过相应的线(19)或(20),以相同的主线路(3连接,4),以(在第19行)可以是(用于解锁13)的压力控制阀(18)接通时,逆流 防止从解锁(13)中的流体。 此外,为了在线路(20)到所述锁定压力腔(16),压力均衡阀(21)被接通。
    • 8. 发明申请
    • HYDRAULISCHE 2-STEMPELHEBEBÜHNE
    • 液压升降2 STAMP
    • WO2005040617A1
    • 2005-05-06
    • PCT/DE2004/002293
    • 2004-10-15
    • HERRMANN, JohannesHÖRNSTEIN, Roland
    • HÖRNSTEIN, Roland
    • F15B11/072
    • B66F7/28B66F7/20F15B11/003F15B11/0725F15B15/261F15B2211/3052F15B2211/30525F15B2211/324F15B2211/46F15B2211/7107
    • Die Erfindung betrifft eine hydraulische 2-Stempelhebebühne mit zwei in vertikaler Richtung (17) miteinander synchron verfahrenden Zylinderrohren (3), mit einer hydraulisch antreibbaren Hubeinheit (18) für jedes Zylinderrohr (3) mit einer mechanischen Quertraverse (5) für beide Hubeinheiten (18) zum Sicherstellen des Gleichlaufs der beiden Zylinderrohre (3) und deren Verdrehsicherung um ihre eigene Längsachse, dadurch gekennzeichnet, dass jede Hubeinheit (18) mit einem stehenden, nach unten abgestützten, hohlen Plungerkolben (4) ausgestattet ist, in dessen Innenraum sich Druckluft (26) und eine Hydraulikflüssigkeit (27) befindet, dessen innerer Hohlraum als Druckbehälter ausgebildet ist und an dessen unterem Ende ein gebogenes Rohr befestigt ist, das innen bis in den oberen Bereich (22) des Plungerkolben (4) reicht.
    • 本发明涉及一种液压2-邮票升降机在上下方向上的两个(17)同步地遍历的每个缸筒(3)与液压驱动升降单元(18),用于每个汽缸筒(3)用机械横梁(5)(对于升降单元18 ),以确保所述两个缸筒(3)和它们的旋转,其特征在于由它自己的纵向轴线的同步,使得每个提升单元(18)配备有一个固定的,向下的支持,中空柱塞(4),其中在内部被压缩的空气( 26)和液压流体(27),其内部空腔被形成为压力容器中,并在其下端的弯曲管固定,其向内延伸到柱塞的上部区域(22)(4)。
    • 9. 发明申请
    • CONTROL DEVICE FOR A WORKING DEVICE CONNECTED TO A HYDRAULIC CIRCUIT
    • 控制装置的液压回路到ANGESCHOLOSSENE劳动组织
    • WO02055426A2
    • 2002-07-18
    • PCT/EP2002/000155
    • 2002-01-10
    • B66F9/22B66F17/00F15B11/00F15B11/044
    • B66F17/003B66F9/22F15B11/003F15B11/044F15B2211/40507F15B2211/40515F15B2211/413F15B2211/41581F15B2211/426F15B2211/428F15B2211/455F15B2211/46F15B2211/5756F15B2211/6355F15B2211/7052Y10S91/02
    • The invention relates to a control device for a working device (12) connected to a hydraulic circuit (10), especially for a load fork (16) which can be raised and lowered with a working cylinder (14) in a fork-lift truck, comprising a valve control unit which moves into an adjustment position when the load fork (16) is lowered even when carrying a load (18), a predefinable maximum volume flow being maintained in the hydraulic circuit (10). By providing the valve control unit with a pressure regulator (26) limiting a pilot control pressure for the control valve (28), once a predefinable regulating pressure differential is reached in the hydraulic circuit, said control valve moves into a regulating position in order to maintain the maximum volume flow and the known flow control valve is replaced in the main flow by a pressure regulator (26) disposed in the pilot control circuit (40) and which only needs to be dimensioned for low volume flows. As a result, the control system can be constructed using simple, low-cost components which operate in a functionally reliable manner and enable stabile control behaviour.
    • 本发明涉及一种控制设备,用于连接到所述工作装置(12)的液压回路(10),特别是用于一用一叉车的eienm工作缸(14)可升降及可降下叉(16),具有一阀控制单元,其降低(期间的负载叉的 16)(也下负载18)的相同占用的控制位置,在所述液压回路中去最大体积流量纯粹vorgebarer(10)eigehalten。 在于,所述阀控制部,其特征在于设置有在达到在液压回路中的预先确定的控制压力差(10),用于控制阀的先导压力(28)被限制,使得它占用了一个控制位置为保持最大Vlumenstromes是温纳压力补偿器(26) 通过在需要只为小的体积流量进行设计的先导回路(40)的压力平衡(26)替换主流中的已知的流量调节阀。 因此,利用简单且廉价的部件控制系统可以实现,这也应在其他方面操作功能可靠的和使能稳定的控制行为。