-
公开(公告)号：US07984890B2
公开(公告)日：2011-07-26
申请号：US12037558
申请日：2008-02-26
CPC分类号： F15B13/0405 , F15B11/006 , F15B13/0433 , F16K31/0648 , F16K31/124 , F16K31/406 , G05D7/0635 , Y10T137/5109 , Y10T137/777
摘要： A pilot-operated valve has a main poppet controlling fluid flow between inlet and outlet ports in response to pressure in a control chamber. Fluid flow through a pilot passage, linking the control chamber and the outlet port, moves an exhaust spool between first and second positions to control fluid flow through passages in the main poppet. The first position blocks flow between the control chamber and the outlet port and provides a path between the control chamber and the inlet port. In the second position, flow between the control chamber and the outlet port is enabled, and a second path, that is more restricted than the first path, is provided between the control chamber and the inlet port. When the valve closes, flow through the first path allows movement of the main poppet at a faster rate than during opening when flow occurs through the more restricted second path.
摘要翻译： 先导操作的阀具有响应于控制室中的压力而在入口和出口之间控制流体流的主提升阀。 通过连接控制室和出口的先导通道的流体流动使排气卷轴在第一和第二位置之间移动，以控制通过主提升阀中的通道的流体流动。 第一位置阻挡在控制室和出口之间的流动并且提供控制室和入口之间的路径。 在第二位置，控制室和出口之间的流动是可以实现的，并且在控制室和入口之间提供比第一路径更受限制的第二路径。 当阀关闭时，通过第一路径的流动允许主阀芯以比通过更受限制的第二路径发生流动时更快的速度移动。
-
公开(公告)号：US20090212244A1
公开(公告)日：2009-08-27
申请号：US12037558
申请日：2008-02-26
CPC分类号： F15B13/0405 , F15B11/006 , F15B13/0433 , F16K31/0648 , F16K31/124 , F16K31/406 , G05D7/0635 , Y10T137/5109 , Y10T137/777
摘要： A pilot-operated valve has a main poppet controlling fluid flow between inlet and outlet ports in response to pressure in a control chamber. Fluid flow through a pilot passage, linking the control chamber and the outlet port, moves an exhaust spool between first and second positions to control fluid flow through passages in the main poppet. The first position blocks flow between the control chamber and the outlet port and provides a path between the control chamber and the inlet port. In the second position, flow between the control chamber and the outlet port is enabled, and a second path, that is more restricted than the first path, is provided between the control chamber and the inlet port. When the valve closes, flow through the first path allows movement of the main poppet at a faster rate than during opening when flow occurs through the more restricted second path.
摘要翻译： 先导操作的阀具有响应于控制室中的压力而在入口和出口之间控制流体流的主提升阀。 通过连接控制室和出口的先导通道的流体流动使排气卷轴在第一和第二位置之间移动，以控制通过主提升阀中的通道的流体流动。 第一位置阻挡在控制室和出口之间的流动并且提供控制室和入口之间的路径。 在第二位置，控制室和出口之间的流动是可以实现的，并且在控制室和入口之间提供比第一路径更受限制的第二路径。 当阀关闭时，通过第一路径的流动允许主阀芯以比通过更受限制的第二路径发生流动时更快的速度移动。
-
公开(公告)号：US07753077B2
公开(公告)日：2010-07-13
申请号：US11737193
申请日：2007-04-19
IPC分类号： F15B13/02
CPC分类号： F15B13/0424 , Y10T74/20201 , Y10T137/8326 , Y10T137/87056 , Y10T137/87072
摘要： A user input device is provided for a hydraulic system that has a source of pressurized fluid and a tank. The user input device includes a body with a supply passage for receiving the pressurized fluid, a tank passage for connection to the tank, and a first chamber. A handle is pivotally attached to the body and operates one or more valves within the body. In a preferred embodiment, the handle can be pivoted independently about two orthogonal axis with separate pairs of valves operated by movement about each axis. In response to the position of the handle, each valve connects a separate chamber alternately to either the supply passage or the tank passage and different pressure sensor produces an electrical signal indicating a level of pressure in the chamber of each valve. Thus an electrical signal is produced from each valve to indicate motion of the handle.
摘要翻译： 为具有加压流体源和罐的液压系统提供用户输入装置。 用户输入装置包括具有用于接收加压流体的供应通道的主体，用于连接到罐的箱通道和第一室。 手柄枢转地附接到主体并且操作身体内的一个或多个阀。 在优选实施例中，手柄可以围绕两个正交轴线独立地枢转，并且通过围绕每个轴线的运动来操作的单独的阀对。 响应于手柄的位置，每个阀将一个单独的腔室交替地连接到供给通道或油箱通道，并且不同的压力传感器产生指示每个阀的腔室中的压力水平的电信号。 因此，从每个阀产生电信号以指示手柄的运动。
-
4.发明申请公开(公告)号：US20080072749A1
公开(公告)日：2008-03-27
申请号：US11535505
申请日：2006-09-27
IPC分类号： F15B11/08
CPC分类号： F15B11/165 , F15B11/003 , F15B11/024 , F15B11/0445 , F15B11/05 , F15B13/0402 , F15B13/0433 , F15B13/0435 , F15B13/16 , F15B2211/20546 , F15B2211/253 , F15B2211/30555 , F15B2211/329 , F15B2211/5059 , F15B2211/6054 , F15B2211/6309 , F15B2211/6313 , F15B2211/6346 , F15B2211/7053 , F15B2211/8636
摘要： A hydraulic circuit controls flow of fluid between first and second ports of a hydraulic actuator, such as a cylinder/piston arrangement and each of a supply conduit and a tank return conduit. The hydraulic circuit operates in standard powered operating modes as well as powered and unpowered regeneration modes. In a powered operating mode, a conventional pressure compensated spool valve determines the velocity of the hydraulic actuator. A workport blocking valve connects one workport of the spool valve to the first port and the other workport is connected to the second port. A regeneration shunt valve is directly connected between the first and second ports of the hydraulic actuator. In a regeneration operating mode or a mix of powered and regeneration modes, a combination of the spool valve, the workport blocking valve, and the regeneration shunt valve determines the velocity of the hydraulic actuator.
摘要翻译： 液压回路控制液压致动器的第一和第二端口之间的流体流动，例如气缸/活塞装置以及供应管道和罐返回管道中的每一个。 液压回路在标准动力运行模式以及动力和无动力再生模式下运行。 在动力操作模式中，传统的压力补偿滑阀确定液压致动器的速度。 工作端口截止阀将滑阀的一个工作端口连接到第一端口，另一个工作端口连接到第二端口。 再生分流阀直接连接在液压执行器的第一和第二端口之间。 在再生操作模式或动力和再生模式的混合中，滑阀，工作端口阻塞阀和再生分流阀的组合决定了液压致动器的速度。
-
5.发明授权公开(公告)号：US07296404B2
公开(公告)日：2007-11-20
申请号：US11299926
申请日：2005-12-12
申请人： Joseph L. Pfaff
发明人： Joseph L. Pfaff
IPC分类号： F16D31/02
CPC分类号： E02F9/2207
摘要： A machine member driven by a hydraulic actuator may oscillate, or wag, when the hydraulic actuator decelerates or stops. The degree of oscillation is a function of the machine member's ability to track a deceleration command, which ability varies with changes in the position of the machine member and the load force acting thereon. To reduce the oscillation, a command that controls operation of the hydraulic actuator is filtered using a filter function that changes with the machine member's load. The load force exerted on the hydraulic actuator which in turn can be designated by fluid pressure that results from the hydraulic actuator. Preferably, the frequency of the filter function is varied inversely with the magnitude of the actuator load force.
摘要翻译： 当液压执行器减速或停止时，由液压执行器驱动的机器构件可能会振荡或晃动。 振动的程度是机器构件跟踪减速命令的能力的函数，该能力随着机器构件的位置和作用在其上的载荷力的变化而变化。 为了减少振动，控制液压执行机构运行的命令是使用随机器负载变化的过滤功能进行过滤的。 施加在液压致动器上的负载力又可以由液压致动器产生的流体压力指示。 优选地，过滤器功能的频率与致动器负载力的大小成反比变化。
-
公开(公告)号：US07905088B2
公开(公告)日：2011-03-15
申请号：US11939861
申请日：2007-11-14
IPC分类号： F16D31/02
CPC分类号： F15B11/006 , E02F9/2217 , E02F9/2228 , E02F9/2292 , E02F9/2296 , F15B11/024 , F15B21/14 , F15B2211/212 , F15B2211/30575 , F15B2211/625 , F15B2211/6313 , F15B2211/6346 , F15B2211/7128 , F15B2211/88
摘要： A hydraulic system has a valve assembly with two workports coupled to chambers of first and second cylinders which are connected mechanically in parallel to a machine component. A separation control valve is connected between first chambers of both cylinders, and a shunt control valve is connected between the workports. A recovery control valve couples an accumulator to the first chamber of the second cylinder. Opening and closing the valves in different combinations routes fluid from one or both cylinders into the accumulator where the fluid is stored under pressure, and thereafter enables stored fluid to be used to power one or both cylinders. The shunt control valve is used to route fluid exhausting from one chamber of each cylinder to the other chambers of those cylinders. Thus the hydraulic system recovers and reuses energy in various manners.
摘要翻译： 液压系统具有阀组件，其具有联接到第一和第二气缸的室的两个工作端口，其与机器部件机械并联连接。 分离控制阀连接在两个气缸的第一腔室之间，分流控制阀连接在工作口之间。 恢复控制阀将蓄能器连接到第二气缸的第一室。 以不同组合打开和关闭阀门将流体从一个或两个气缸引导到储存器中，其中流体在压力下储存，然后使得存储的流体能够用于为一个或两个气缸供电。 分流控制阀用于将每个气缸的一个室的流体排出物引导到这些气缸的其他室。 因此，液压系统以各种方式恢复和再利用能量。
-
公开(公告)号：US20100155633A1
公开(公告)日：2010-06-24
申请号：US12619204
申请日：2009-11-16
申请人： Joseph L. Pfaff
发明人： Joseph L. Pfaff
CPC分类号： F16K31/406 , F15B13/0405 , F15B13/0433 , Y10T137/7764
摘要： A control valve includes a main poppet that moves in response to pressure in a primary control chamber and thereby controls the flow of fluid through a valve seat between first and second ports. A passageway extends between the second port and the primary control chamber and includes a variable flow restriction that decreases as the main poppet moves away from the valve seat. An electrohydraulic pilot valve has a pilot poppet which controls fluid flow from the primary control chamber to the first port in response to pressure in a pilot control chamber. A sub-pilot valve selectively releases pressure in the pilot control chamber to operate the pilot poppet to open and close a path between the inlet and the outlet. Using an electrohydraulic pilot valve enables the main poppet to operate quickly in controlling large fluid flow rates. Unidirectional and bidirectional versions of the control valve are described.
摘要翻译： 控制阀包括响应于主控制室中的压力移动的主提升阀，从而控制通过第一和第二端口之间的阀座的流体流动。 通道在第二端口和主控制室之间延伸并且包括当主提升阀远离阀座移动时减小的可变流量限制。 电液导阀具有先导提升阀，其控制响应于先导控制室中的压力从主控制室到第一端口的流体流动。 副先导阀选择性地释放先导控制室中的压力以操作先导提升阀以打开和关闭入口和出口之间的路径。 使用电液导阀使主提升阀能够快速地操作以控制大的流体流速。 描述了控制阀的单向和双向版本。
-
8.发明申请公开(公告)号：US20080042087A1
公开(公告)日：2008-02-21
申请号：US11426397
申请日：2006-06-26
申请人： Joseph L. Pfaff
发明人： Joseph L. Pfaff
IPC分类号： F16K31/02
CPC分类号： F15B11/006 , F15B21/08 , F15B2211/20546 , F15B2211/30575 , F15B2211/3144 , F15B2211/327 , F15B2211/6309 , F15B2211/6313 , F15B2211/7053 , H01F7/13 , H01F7/1844 , H01F27/34
摘要： A method for operating an electrohydraulic valve initially derives a characterization value that denotes how magnetic hysteresis affects valve operation. Upon receiving a command that designates a desired magnitude of electric current to be applied to the electrohydraulic valve, that command is modified based on the characterization value to compensate for the magnetic hysteresis. The modified command then is employed to apply electric current to the electrohydraulic valve.
摘要翻译： 用于操作电动液压阀的方法最初导出表征值，其表示磁滞如何影响阀门操作。 在接收到指定要施加到电动液压阀的期望电流大小的命令时，基于表征值修改该指令以补偿磁滞。 然后，改变的命令用于将电流施加到电动液压阀。
-
9.发明授权Priority communication protocol for a distributed electrohydraulic system having multiple controllers 有权具有多个控制器的分布式电动液压系统的优先通信协议公开(公告)号：US07210291B2
公开(公告)日：2007-05-01
申请号：US11406651
申请日：2006-04-19
申请人： Joseph L. Pfaff
发明人： Joseph L. Pfaff
IPC分类号： H04L12/40 , G06F7/00 , G05B19/414
摘要： A distributed hydraulic system having a plurality of hydraulic functions each including a hydraulic actuator, a valve assembly that controls flow of fluid to the hydraulic actuator, and a function controller which operates the valve assembly. The function controllers exchange messages over a communication network which has a finite bandwidth. Access to the network is controlled by determining which function controllers govern high priority operations and allowing those function controllers to send messages as often as once every first interval of time. The other function controllers are limited to sending messages no more often than once every second interval of time, which is longer than the first interval of time.
摘要翻译： 一种具有多个液压功能的分布式液压系统，每个液压功能包括液压致动器，控制流体流向液压致动器的阀组件以及操作阀组件的功能控制器。 功能控制器通过具有有限带宽的通信网络交换消息。 通过确定哪些功能控制器控制高优先级操作并允许这些功能控制器经常每隔一段时间发送消息来控制对网络的访问。 其他功能控制器限于每隔一段时间发送消息不止一次，这比第一个时间间隔长。
-
10.发明授权Communication protocol for a distributed electrohydraulic system having multiple controllers 有权具有多个控制器的分布式电动液压系统的通讯协议公开(公告)号：US07194855B2
公开(公告)日：2007-03-27
申请号：US10972853
申请日：2004-10-25
申请人： Joseph L. Pfaff
发明人： Joseph L. Pfaff
IPC分类号： G06F7/00
摘要： A distributed hydraulic system having a plurality of hydraulic functions each including a hydraulic actuator, a valve assembly that controls flow of fluid to the hydraulic actuator, and a function controller which operates the valve assembly. The function controllers exchange messages over a communication network which has a finite bandwidth. Access to the network is controlled by determining which function controllers govern high priority operations and allowing those function controllers to send messages as often as once every first interval of time. The other function controllers are limited to sending messages no more often than once every second interval of time, which is longer than the first interval of time.
摘要翻译： 一种具有多个液压功能的分布式液压系统，每个液压功能包括液压致动器，控制流体流向液压致动器的阀组件以及操作阀组件的功能控制器。 功能控制器通过具有有限带宽的通信网络交换消息。 通过确定哪些功能控制器控制高优先级操作并允许这些功能控制器经常每隔一段时间发送消息来控制对网络的访问。 其他功能控制器限于每隔一段时间发送消息不止一次，这比第一个时间间隔长。
-
-
-
-
-
-
-
-
-
搜索结果
48 条记录 (耗时 0.027 秒)
