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1. 发明公开

EP4095393A1 HYDRAULIC DISTRIBUTOR WITH COMPENSATOR DEVICE FOR DIRECTIONAL VALVES AND HYDRAULIC CIRCUIT COMPRISING THE SAME 审中-实审
公开(公告)号：EP4095393A1
公开(公告)日：2022-11-30
申请号：EP22175917.8
申请日：2022-05-27
申请人： Walvoil S.p.A.
发明人： BUSANI, Ulderico , MESTURINI, Davide , GANASSI, Gianluca , SCOLARI, Mattia
IPC分类号： F15B11/05 , F15B11/16 , F15B21/14
摘要： A hydraulic distributor comprises at least one main spool configured to define a delivery segment, and a discharge segment, a supply segment and a pressure compensator configured in such a way that acting on one of a first side thereof is a local pressure and acting on a second side is a maximum Load Sensing pressure either characteristic of the working pressure of the hydraulic user, in the case single hydraulic user is present, or, in the case of a plurality of hydraulic users are present, each defining a respective characteristic pressure, characteristic of the maximum pressure among the characteristic pressures of the hydraulic users. The pressure compensator comprises at least three ways, of which a third way is configured in such a way as to connect the discharge segment with an energy recovery stretch connectable to an energy recovery device. The pressure compensator comprises a position sensor configured to detect the position of said pressure compensator and transmit it to a control unit operatively connected to the energy recovery device.

2. 发明授权

EP2201254B1 LOAD SENSING DIRECTIONAL CONTROL VALVE WITH AN ELEMENT HAVING PRIORITY UNDER SATURATION CONDITIONS 有权
标题翻译：最后获取阀，欠饱和状态优先-DO元
公开(公告)号：EP2201254B1
公开(公告)日：2011-08-10
申请号：EP07805661.1
申请日：2007-06-26
申请人： Walvoil S.p.A.
发明人： BUSANI, Ulderico
IPC分类号： F15B13/04
CPC分类号： 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
摘要： 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.

3. 发明公开

EP4001671A1 HYDRAULIC CIRCUIT WITH COMBINED COMPENSATION AND ENERGY RECOVERY FUNCTION 审中-实审
公开(公告)号：EP4001671A1
公开(公告)日：2022-05-25
申请号：EP21208732.4
申请日：2021-11-17
申请人： Walvoil S.p.A.
发明人： BUSANI, Ulderico , GANASSI, Gianluca , MESTURINI, Davide
IPC分类号： F15B21/14
摘要： A hydraulic circuit with a compensation and energy recovery function comprises a distribution module which includes at least one spool defining a main delivery branch and a discharge branch. The hydraulic circuit also includes a supply unit and a three-way compensated adjustment device connected to the spool discharge branch and connected to discharge at a second channel. The three-way compensated adjustment device further comprises a first piloting line and a second piloting line configured so that a Maximum Load Sensing piloting signal acts on one side and a Local Load Sensing piloting signal acts on the second side. The hydraulic circuit further comprises an energy recovery device and a selection section configured to receive a signal at reduced pressure and send it to the first piloting line in such a way as to activate the three-way compensated adjustment device switching to a position where the fluid coming from the discharge branch is sent to the energy recovery device.

4. 发明公开

EP3390841A1 HYDRAULIC VALVE DEVICE WITH MULTIPLE WORKING SECTIONS WITH PUMP CONTROL SYSTEM WITH BY-PASS LINE 有权
公开(公告)号：EP3390841A1
公开(公告)日：2018-10-24
申请号：EP16822940.9
申请日：2016-12-16
申请人： Walvoil S.p.A.
发明人： BUSANI, Ulderico
IPC分类号： F15B11/042 , F15B11/05 , F15B11/16
CPC分类号： F15B11/055 , F15B11/042 , F15B11/165 , F15B2211/20546 , F15B2211/3116 , F15B2211/40507 , F15B2211/40515 , F15B2211/40553 , F15B2211/50554 , F15B2211/605 , F15B2211/635
摘要： 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.

5. 发明公开

EP3744984A1 OLEODYNAMIC VALVE 有权
公开(公告)号：EP3744984A1
公开(公告)日：2020-12-02
申请号：EP20177257.1
申请日：2020-05-28
申请人： Walvoil S.p.A.
发明人： MESTURINI, Davide , BUSANI, Ulderico , CERVI, Alessandro
IPC分类号： F15B11/16
摘要： A hydraulic circuit for a working machine, for example a front loader, comprising: a supply line configured so as to receive a supply pressure from a pump associated or associable to the drive distributor; a plurality of spools, each spool being configured to supply said supply pressure in a controlled manner to a corresponding first use and a corresponding second use so as to be able to make a hydraulic actuator of the working machine carry out an upward or downward movement, respectively; a pilot line that passes through all the spools through respective hydraulic passages up to a discharge line; said hydraulic circuit further comprising a control device including a logic element, which can be switched between a free passage position and a choked passage position, wherein the control device further comprise a driving conduit configured to switch the logic element between the free passage position and the choked passage position, said driving conduit being connected to said pilot line onto which a diversion pressure generated by means of a pressure reducing member or by an outer pressure source acts, and which is located at a diversion line, said spools being configured so that when at least one spool of said plurality of spools is in such a position as to make the hydraulic actuator of the working machine carry out the upward movement, a relative passage of the pilot line passing through the spool is closed, so that said logic element is switched from the free passage position to the choked passage position.

6. 发明公开

EP2201254A1 LOAD SENSING DIRECTIONAL CONTROL VALVE WITH AN ELEMENT HAVING PRIORITY UNDER SATURATION CONDITIONS 有权
标题翻译：最后获取阀，欠饱和状态优先-DO元
公开(公告)号：EP2201254A1
公开(公告)日：2010-06-30
申请号：EP07805661.1
申请日：2007-06-26
申请人： Walvoil S.p.A.
发明人： BUSANI, Ulderico
IPC分类号： F15B13/04
CPC分类号： 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
摘要： 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.

7. 发明公开

EP3953787A1 A MODULAR CONTROL APPARATUS FOR ACTUATING HYDRAULIC VALVE SYSTEMS 审中-实审
公开(公告)号：EP3953787A1
公开(公告)日：2022-02-16
申请号：EP20725905.2
申请日：2020-04-10
申请人： Walvoil S.p.A.
发明人： CERVI, Alessandro , MESTURINI, Davide , BUSANI, Ulderico , POLI, Daniel
IPC分类号： G05G5/12 , G05G9/047 , F15B13/042

8. 发明公开

EP3390843A1 MODULAR DIRECTIONAL VALVE WITH TWO OR MORE ELEMENTS OF MIXED TYPE 有权
公开(公告)号：EP3390843A1
公开(公告)日：2018-10-24
申请号：EP16822650.4
申请日：2016-12-16
申请人： Walvoil S.p.A.
发明人： BUSANI, Ulderico , DODI, Daniele , MUSIANI,Massimiliano
IPC分类号： F15B11/16 , F15B11/17
CPC分类号： F15B11/17 , F15B2211/20538 , F15B2211/20546 , F15B2211/20576 , F15B2211/30555 , F15B2211/30595 , F15B2211/3116 , F15B2211/7142
摘要： 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.

9. 发明公开

EP3822492A1 HYDRAULIC CIRCUIT HAVING A COMBINED COMPENSATION AND ENERGY RECOVERY FUNCTION 有权
公开(公告)号：EP3822492A1
公开(公告)日：2021-05-19
申请号：EP20207627.9
申请日：2020-11-13
申请人： Walvoil S.p.A.
发明人： MESTURINI, Davide , BUSANI, Ulderico , SCOLARI, Mattia
IPC分类号： F15B21/14 , F15B11/16
摘要： A hydraulic circuit having a function of compensation and energy recovery comprises a distribution module, a three-way compensated regulator device, a variable flow rate or pressure feeding assembly, an energy recovery device connected to the three-way compensated regulator device. The distribution module comprises a spool including an inlet recess and a drain recess configured so that the flow rate of fluid inlet to the utility is equal to or less than the one outlet therefrom, possibly net of a correction factor. There is also a respective first driving channel and a second driving channel configured so that a pressure taken upstream of the drain recess acts on a first side of the regulator device, and so that a pressure taken downstream of the drain recess in the first channel acts on a second side of the regulator device, and an additional force.

10. 发明公开

EP3076028A1 HYDRAULIC VALVE DEVICE WITH MULTIPLE WORKING SECTIONS 有权
标题翻译：枸橼酸UNG UNG UNG TEN TEN TEN TEN TEN TEN TEN TEN TEN TEN TEN TEN TEN TEN TEN
公开(公告)号：EP3076028A1
公开(公告)日：2016-10-05
申请号：EP16163600.6
申请日：2016-04-01
申请人： Walvoil S.p.A.
发明人： BUSANI, Ulderico , FORNACIARI, Andrea
IPC分类号： F15B11/17
CPC分类号： F15B11/17 , E02F9/2282 , E02F9/2292 , E02F9/2296 , F15B2211/20546 , F15B2211/20576 , F15B2211/30595 , F15B2211/7142
摘要： A hydraulic directional load-sensing flow-sharing system (9), of the type comprising two independent circuits at the sides of an intermediate summation element (3). The two circuits are configured for connecting to a low pressure line (T) and respective load-sensing (LS) delivering apparatus (PA) and (PB) via respective high pressure lines (P1) and (P2) and load-sensing signal lines (LS1) and (LS2); each line (LS1) and (LS2) connectable to a respective bleed valve (b1) and (b2). The two circuits are connectable to respective utilities via the connections (A1, B1, A2, B2, A3, A4, B3, B4) placed on respective elements (E1, E2, E3, E4) of said modular hydraulic system (9), of which (E2) and (E3) are served by said apparatus (PA) and (PB), respectively. The intermediate summation element (3) can be controlled electrically to keep (P1) and (P2), channels (ST1) and (ST2) coming from said elements (E1, E2) and signals (LS1) and (LS2) separated, or keep them combined.
In a first position (I), element (3) keeps the circuits and thereby the high pressure lines (P1) and (P2), elements (E2, E3) downstream of the relative compensators and upstream of the return to the relative spools (ST1 and ST2) separated and independent, it also keeps lines (LS1) and (LS2) separated; in a second position (II), it combines the two circuits into one, combining the high pressure lines (P1) and (P2), and elements (E2, E3); channels (LS1) and (LS2), connecting them to only one of the two bleeds; in a third position (III), it only connects the high pressure lines (P1) and (P2), keeping lines (LS1) and (LS2) separated; also keeping (ST1) and (ST2) of elements (E2, E3) separated.
摘要翻译：一种在中间求和元件（3）的侧面包括两个独立电路的类型的液压定向负载感测分流系统（9）。这两个电路被配置用于经由相应的高压线路（P1）和（P2）和负载感测信号线路（P）连接到低压线路（T）和相应的负载感测（LS）输送设备（PA）和（PB）（LS1）和（LS2）; 每条线（LS1）和（LS2）可连接到相应的排气阀（b1）和（b2）。这两个电路可通过放置在所述模块化液压系统（9）的相应元件（E1，E2，E3，E4）上的连接件（A1，B1，A2，B2，A3，A4，B3，B4）其中（E2）和（E3）分别由所述装置（PA）和（PB）提供。中间求和元件（3）可以被电气控制以保持（P1）和（P2），来自所述元件（E1，E2）和信号（LS1）和（LS2）的信道（ST1）和（ST2）分离，或保持合并在第一位置（I）中，元件（3）将相应补偿器的下游的回路和高压线（P1）和（P2），元件（E2，E3）保持在相对线轴的上游 ST1和ST2）分离和独立，它也保持线（LS1）和（LS2）分离; 在第二位置（II）中，它将两个电路组合成一个，组合高压线（P1）和（P2）和元件（E2，E3）; 通道（LS1）和（LS2），将它们连接到两个出血中的一个; 在第三位置（III）中，仅连接高压线（P1）和（P2），保持线（LS1）和（LS2）分离; 还保持元件（E2，E3）的（ST1）和（ST2）分离。

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