公开(公告)号：WO2008125148A1

公开(公告)日：2008-10-23

申请号：PCT/EP2007/053744

申请日：2007-04-17

Applicant: WALVOIL S.P.A.

Inventor： ALLEGRETTI, Mirco

IPC: F15B13/04

CPC classification number: F15B13/0422

Abstract: The present invention relates to the field of units for hydraulic pilot control of directional-control valves used in the fabrication of mobile vehicles and particularly relates to a hydraulic pilot control with an oscillation damping system. Connections are provided among the chambers in the pilot control unit to provide a damping effect in the actuation stroke, thereby preventing any oscillation: the provision of such connections among the chambers has the function of preventing air stagnation; this arrangement prevents any undamped behavior due to incomplete filling upon installation or to air transported in the hydraulic fluid.

Abstract translation: 本发明涉及用于制造移动式车辆的方向控制阀的液压先导控制单元领域，特别涉及具有振荡阻尼系统的液压先导控制。 在先导控制单元的室之间提供连接，以在致动行程中提供阻尼效果，从而防止任何振荡：在室之间提供这种连接具有防止空气停滞的功能; 这种布置防止由于在安装时的不完全填充或在液压流体中输送的空气而导致的任何无阻尼的行为。

公开(公告)号：WO2017103100A1

公开(公告)日：2017-06-22

申请号：PCT/EP2016/081417

申请日：2016-12-16

Applicant: WALVOIL S.P.A.

Inventor： BUSANI, Ulderico ,  DODI, Daniele ,  MUSIANI, Massimo

IPC: F15B11/16 ,  F15B11/17

CPC classification number: F15B11/17 ,  F15B2211/20538 ,  F15B2211/20546 ,  F15B2211/20576 ,  F15B2211/30555 ,  F15B2211/30595 ,  F15B2211/3116 ,  F15B2211/7142

Abstract: A modular directional valve with two or more elements (E1, E2, E3, E4) in turn connectable to respective utilities (U) through the uses (A1, B1, A2... B4); of which one or more elements (E1 E2) are of the CA type while one or more elements are of LS flow sharing type (E3, E4). The valve designed to be connected to a first high pressure line P1 which connects the crossing elements to a constant displacement pump (PA) and a second high pressure line P2 which connects the LS flow sharing type elements to a variable displacement pump LS, the connection to a low pressure line, the connection to a load sensing signal line (LS2) with the variable displacement pump LS (PB). Said valve acting so that if the load sensing flow sharing elements (E3, E4) fed by the line (P2) designed for the connection with the pump (PB) are in saturation, it withdraws from the carry over (6) of the group of elements (E1, E2) of the crossing type the amount of flow rate equal to the difference between the flow rate required by the utilities (U) of the elements (E3, E4) and the maximum flow rate which can be supplied by the LS pump (PB); otherwise, it freely delivers the flow rate of the constant displacement pump to the low pressure line.

Abstract translation: 具有两个或两个以上元件（E1，E2，E3，E4）的模块化换向阀又可通过用途（A1，B1，A2 ... B4）连接到相应的设施（U）。 其中一个或多个元素（E1 E2）属于CA类型，而一个或多个元素属于LS流量共享类型（E3，E4）。 阀设计成连接到将交叉元件连接到恒定排量泵（PA）的第一高压管路P1和将LS流量分配型元件连接到可变排量泵LS的第二高压管路P2，连接 通过可变排量泵LS（PB）连接到负载传感信号线（LS2）。 所述阀起作用，使得如果由设计用于与泵（PB）连接的管线（P2）供给的负载感测流量共享元件（E3，E4）处于饱和状态，则其从组件的转移（6） 交叉类型的元素（E1，E2）的流量等于流量值与元素（E3，E4）的效用（U）所需的流量之间的差值以及元素（E3，E4）能够提供的最大流量 LS泵（PB）; 否则，它可以自由地将定量泵的流量输送到低压管路。

公开(公告)号：WO2007116035A1

公开(公告)日：2007-10-18

申请号：PCT/EP2007/053423

申请日：2007-04-06

Applicant: WALVOIL S.P.A. ,  GANASSI, Gianluca

Inventor： GANASSI, Gianluca

IPC: F15B11/16 ,  F15B21/14

CPC classification number: F15B11/165 ,  F15B21/14 ,  F15B2211/20538 ,  F15B2211/253 ,  F15B2211/50536 ,  F15B2211/528 ,  F15B2211/57 ,  F15B2211/88

Abstract: In a hydraulic Load Sensing directional control valve, a pressure compensator, bypass-connected to the delivery line, discharges the pump-delivered fluid flow not demanded by the actuators to the low-pressure line, with a first (lower) value or a second (higher) value of pressure margin, depending on how one of its differential areas is piloted by a hydraulic, mechanical or electrohydraulic control system.

Abstract translation: 在液压负载传感方向控制阀中，旁路连接到输送管线的压力补偿器将由执行器不要求的泵输送的流体流排放到低压管线，具有第一（较低）值或第二 （较高）的压力裕度值，这取决于其差动区域如何由液压，机械或电液控制系统引导。

公开(公告)号：WO2017103104A1

公开(公告)日：2017-06-22

申请号：PCT/EP2016/081423

申请日：2016-12-16

Applicant: WALVOIL S.P.A.

Inventor： BUSANI, Ulderico

IPC: F15B11/042 ,  F15B11/05 ,  F15B11/16

CPC classification number: F15B11/055 ,  F15B11/042 ,  F15B11/165 ,  F15B2211/20546 ,  F15B2211/3116 ,  F15B2211/40507 ,  F15B2211/40515 ,  F15B2211/40553 ,  F15B2211/50554 ,  F15B2211/605 ,  F15B2211/635

Abstract: Modular directional valve with two or more crossing elements (E1.. En) able, acting only on the entry side, to manage a variable displacement pump (PA) of the load sensing type. In particular, this management allows in a single drive, unlike the conventional crossing distributors, to make the flow rate to the utility independent of the load and allows setting a maximum flow rate at the end of the stroke; in multiple drives, it ensures that the sum of the required flow rates is independent of the loads. A compensated flow rate regulator is placed in the entry side so as to act only on the bypass line LC upstream of the first element (E1...En) while a proportional choke is placed on the load line consisting of a 2-way 2-position tray.

Abstract translation: 带有两个或两个以上交叉元件（E1 .. En）的模块化方向阀只能在入口侧作用，以管理负载传感类型的变量泵（PA）。 特别是，与传统的十字分配器不同，这种管理方式允许在单一驱动器中独立于负载制造效用流量，并允许在行程结束时设置最大流量; 在多个驱动器中，它可确保所需流量的总和独立于负载。 补偿流量调节器放置在入口侧，以便仅作用于第一元件（E1 ... En）上游的旁路管线LC，而比例阻流器放置在由2路2 位置托盘。

公开(公告)号：WO2010004511A1

公开(公告)日：2010-01-14

申请号：PCT/IB2009/052964

申请日：2009-07-08

Applicant: WALVOIL S.P.A. ,  MAZZONI, Matteo

Inventor： MAZZONI, Matteo

IPC: F16K17/04 ,  F16K15/02

CPC classification number: F16K17/0433 ,  F15B13/024 ,  F16K17/06 ,  Y10T137/7738 ,  Y10T137/785

Abstract: The present invention relates to the field of adjustable pressure relief valves for use in hydraulic circuits, particularly for controlling pressure transients - acceleration and deceleration - of hydraulic motors subject to inertia forces (progressive anti-shock pressure relief valves). The optimized valve of the present invention is characterized by reduced leakage, involving a reduced influence of flow forces during valve control, as well as reduced pressure losses; these characteristics prevent the hydraulic motor from rotating when it is subject to a drive load and is not powered, eliminate vibrations and instability of valve-regulated pressure, especially at low flow rates, and ensure an adjustment value varying according to the flow rate through the valve. A further characteristic of the valve of the present invention is the reduced number of its components, resulting in greater cost effectiveness.

Abstract translation: 本发明涉及用于液压回路中的可调压力释放阀的领域，特别是用于控制经受惯性力的液压马达的压力瞬变（加速和减速）（逐步的抗冲击压力释放阀）。 本发明的优化阀的特征在于减少泄漏，包括在阀门控制期间减小的流动力的影响以及减小的压力损失; 这些特性防止液压马达在经受驱动负载时旋转，并且不通电，消除阀门调节压力的振动和不稳定性，特别是在低流量下，并确保根据通过流量的流量变化的调节值 阀。 本发明的阀的另一个特征是其部件数量减少，从而提高了成本效益。

公开(公告)号：WO2018109743A1

公开(公告)日：2018-06-21

申请号：PCT/IB2017/058017

申请日：2017-12-15

Applicant: WALVOIL S.P.A.

Inventor： CERVI, Alessandro

IPC: F15B13/04 ,  F15B13/042

Abstract: The present finding is in the field of servomechanisms for the hydraulic driving of directional control valves used in the construction of mobile vehicles and, in particular, object of the present finding is a differential area servomechanism without oscillating phenomena. A differential area compensation system is provided, as well as an appropriate positioning of the reduced pressure and pressure supply chambers, which intercept the cavities of the spools that are present along the servomechanisms. The differential area is obtained through an area variation obtained along the spool within the chamber connected to the reduced driving line.

公开(公告)号：WO2017103079A1

公开(公告)日：2017-06-22

申请号：PCT/EP2016/081392

申请日：2016-12-16

Applicant: WALVOIL S.P.A.

Inventor： MUSIANI, Massimiliano

IPC: F15B11/042 ,  F15B11/044 ,  F15B11/05 ,  F15B11/16

CPC classification number: F15B11/055 ,  F15B11/042 ,  F15B11/044 ,  F15B11/165 ,  F15B2211/20546 ,  F15B2211/3116 ,  F15B2211/40507 ,  F15B2211/50554 ,  F15B2211/605 ,  F15B2211/6355

Abstract: Modular directional valve with two or more crossing elements (E1.. En) fed by a variable displacement (PA), negative control or load sensing pump. A pressure regulator (5) is placed in the entry side and only on the bypass line and upstream of the first element (E1..En). In the single drive, it makes the flow rate to the utility independent of the load and allows setting a maximum flow rate at the end of the stroke; in multiple drives, it ensures that the sum of the required flow rates is independent of the loads.

Abstract translation: 带有两个或多个由可变排量（PA），负压控制或负载传感泵供油的交叉元件（E1 .. En）的组合换向阀。 压力调节器（5）放置在入口侧，仅在旁路管线和第一个元件（E1..En）的上游。 在单独的驱动器中，它使流量与负载无关，并允许在冲程结束时设置最大流量; 在多个驱动器中，它可确保所需流量的总和与负载无关。

公开(公告)号：WO2009001377A1

公开(公告)日：2008-12-31

申请号：PCT/IT2007/000449

申请日：2007-06-26

Applicant: WALVOIL S.P.A. ,  BUSANI, Ulderico

Inventor： BUSANI, Ulderico

IPC: F15B13/04

CPC classification number: F15B13/0402 ,  F15B11/162 ,  F15B11/163 ,  F15B13/0417 ,  F15B2211/20553 ,  F15B2211/25 ,  F15B2211/30555 ,  F15B2211/3111 ,  F15B2211/40515 ,  F15B2211/41581 ,  F15B2211/46 ,  F15B2211/6051 ,  F15B2211/71 ,  Y10T137/2657

Abstract: The invention relates to the field of load sensing, flow sharing directional control valves for controlling an operating machine, such as an excavator. The directional control valve of the present invention is particularly characterized by the addition of at least one element (E4) wherein the provision of a bore (16) and the replacement of components (30), (50), (Ml) with a compensator (9), having a spring (14) operating on one side thereof (9a), and a piston / load sensing signal selector (8) impart to this single element (E4) the feature of non participating in flow-rate reduction under saturation conditions, while preserving the feature of maintaining a constant flow-rate to the user, irrespective of the variation of the load.

Abstract translation: 本发明涉及负载感测领域，用于控制诸如挖掘机的操作机器的共用方向控制阀。 本发明的方向控制阀的特征在于，添加至少一个元件（E4），其中提供孔（16）和用补偿器替换部件（30），（50），（M1） （9），具有在其一侧（9a）上操作的弹簧（14），以及赋予该单个元件（E4）的活塞/负载感测信号选择器（8）不参与在饱和下的流量降低的特征 条件，同时保持向用户维持恒定流量的特征，而与负载的变化无关。