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    A HYDRAULIC SYSTEM AND A METHOD FOR CONTROLLING A HYDRAULIC SYSTEM
    4.
    发明公开
    A HYDRAULIC SYSTEM AND A METHOD FOR CONTROLLING A HYDRAULIC SYSTEM 审中-公开
    VERFAHREN ZUR STEUERUNG EINES HYDRAULISCHEN系统液压系统

    公开(公告)号：EP2940319A1

    公开(公告)日：2015-11-04

    申请号：EP15171890.5

    申请日：2011-05-31

    申请人： Volvo Construction Equipment AB

    发明人： Heybroek, Kim ,  Wiktor, Roland

    IPC分类号： F15B21/14 ,  E02F9/22 ,  F15B3/00 ,  F16H61/4096

    CPC分类号： F15B13/02 ,  E02F9/2217 ,  E02F9/2235 ,  E02F9/2242 ,  E02F9/2296 ,  F15B11/00 ,  F15B2211/20546 ,  F15B2211/214 ,  F15B2211/26 ,  F15B2211/625 ,  F15B2211/6303 ,  F15B2211/6313 ,  F15B2211/6346 ,  F15B2211/6655 ,  F16H61/4096

    摘要： As such, the present invention relates to a hydraulic system (10) for a working machine (101). The hydraulic system (10) comprises a hydraulic actuator (12) and a first hydraulic machine (14) for supplying fluid to the hydraulic actuator (12). The hydraulic system (10) further comprises a hydraulic transformer (28) for supplying fluid to the hydraulic actuator (12) in parallel with the first hydraulic machine (14), and an accumulator (38) for fluid. The hydraulic transformer (28) comprises a first port (30) and a second port (32) and the transformer (38) is adapted to transform a first pressure and a first flow at the first port (30) to a second pressure and a second flow at the second port (32). The second port (32) of the hydraulic transformer (28) is in fluid communication with the hydraulic actuator (28) and the first port is in communication with the accumulator (38).

    摘要翻译： 因此，本发明涉及一种用于工作机械（101）的液压系统（10）。 液压系统（10）包括用于向液压致动器（12）供应流体的液压致动器（12）和第一液压机械（14）。 液压系统（10）还包括用于与第一液压机器（14）平行地向液压致动器（12）供应流体的液压变压器（28）和用于流体的蓄能器（38）。 液压变压器（28）包括第一端口（30）和第二端口（32），并且变压器（38）适于将第一端口（30）处的第一压力和第一流量转换为第二压力和 在第二端口（32）处的第二流。 液压变压器（28）的第二端口（32）与液压致动器（28）流体连通，第一端口与蓄能器（38）连通。

    COUNTER-BALANCE VALVE
    7.
    发明授权
    COUNTER-BALANCE VALVE 失效
    安全阀

    公开(公告)号：EP0787904B1

    公开(公告)日：2000-06-07

    申请号：EP95934832.7

    申请日：1995-10-18

    申请人： KOMATSU LTD.

    发明人： ARAI, Mitsuru ,  HAYASHI, Seita ,  NUNOTANI, Sadao ,  KADO, Hideki

    IPC分类号： F15B11/00 ,  F15B13/01

    CPC分类号： E02F9/2267 ,  E02F9/2271 ,  F15B11/00 ,  F15B11/044 ,  F15B11/0445 ,  F15B13/021 ,  F15B13/0402 ,  F15B2211/30505 ,  F15B2211/30525 ,  F15B2211/50581 ,  F15B2211/853 ,  Y10T137/2554 ,  Y10T137/2562

    摘要： A counter-balance valve having the construction wherein a valve hole having first and second pump-side ports, first and second motor-side ports and an auxiliary port, a spool fitted to the valve hole slidably in the transverse direction and establishing or cutting off communication between ports, right and left springs for holding the spool at a neutral position at which communication between ports is cut off, a left pressure receiving chamber for moving the spool to a first travelling position at which the first pump-side port communicates with the auxiliary port and the second pump-side port communicates with the second motor-side port by a pressure oil supplied, and a right pressure receiving chamber for moving the spool to a second travelling position at which the second pump-side port communicates with the auxiliary port and the first pump-side port communicates with the first motor-side port by the pressure oil supplied, are provided to a valve main body, first shaft hole communicating with the left pressure receiving chamber, a second shaft hole communicating with the right pressure receiving chamber, first and second small diameter holes allowing normally the first and second shaft holes to communicate with the first and second pump-side ports and first and second large diameter holes for allowing the first and second shaft holes to communicate with the outer peripheral surface of the spool are formed on the spool, respectively, the first and second large diameter holes are closed when the spool exists at the neutral position and at the position between the neutral position and the first and second travelling positions, and the first and second large diameter holes communicate with the auxiliary port when the spool exists at the first and second travelling positions.

    WORK MACHINE
    8.
    发明公开
    WORK MACHINE 审中-实审

    公开(公告)号：EP4375516A1

    公开(公告)日：2024-05-29

    申请号：EP22924036.1

    申请日：2022-10-31

    申请人： Hitachi Construction Machinery Co., Ltd.

    发明人： KUMAGAI, Kento ,  IMURA, Shinya ,  TSURUGA, Yasutaka ,  CHIBA, Takaaki ,  YAMAMOTO, Shinjirou ,  AMANO, Hiroaki ,  NISHIKAWA, Shinji ,  NARAZAKI, Akihiro

    IPC分类号： F15B11/00 ,  E02F9/22 ,  F15B11/028 ,  F15B11/042 ,  F15B11/044

    CPC分类号： F15B11/042 ,  F15B11/028 ,  F15B11/00 ,  F15B11/044 ,  E02F9/22

    摘要： An object of the present invention is to provide a work machine that makes it possible to perform, with a simple configuration, speed control of respective actuators and thrust control of a particular actuator that regenerates the flow of a return fluid, at the time of combined operation to simultaneously drive the particular actuator and another actuator. For this purpose, a controller calculates a target thrust that is a target value of a thrust of the particular actuator on the basis of an input amount of an operation device and an output value of a posture sensor, calculates a target meter-out pressure that is a target value of a meter-out pressure of the particular actuator on the basis of the target thrust and a meter-in pressure of the particular actuator, and calculates a regeneration control valve target opening area that is a target value of an opening area of a regeneration control valve on the basis of the target meter-out pressure and the meter-out pressure of the particular actuator.

    HYDRAULIC CONNECTION HAVING A FLEXIBLE PORT MOUTH AND METHOD FOR CONNECTING SAME
    10.
    发明公开
    HYDRAULIC CONNECTION HAVING A FLEXIBLE PORT MOUTH AND METHOD FOR CONNECTING SAME 审中-公开

    公开(公告)号：EP3394493A1

    公开(公告)日：2018-10-31

    申请号：EP16879908.8

    申请日：2016-12-16

    申请人： SPX FLOW, Inc.

    发明人： LANDRUM, Michael T.

    IPC分类号： F16L17/06

    CPC分类号： F15B13/02 ,  F15B11/00 ,  F15B2211/405 ,  F15B2211/422 ,  F16K5/0257 ,  F16K11/0836 ,  F16K27/062 ,  F16K31/602 ,  F16K39/06

    摘要： A hydraulically balanced assembly is provided. The assembly includes: a valve body defining a tapered axial passageway; and a rotor having a tapered outer diameter such that the rotor has a first portion having a wider diameter and a second portion having a smaller diameter, the rotor being dimensioned to fit within the axial passageway of the valve body, the rotor further defining a rotor axial passageway having a first passageway portion and second passageway portion, the rotor further defining a first and second port, where each of the first and second ports provide fluid communication between the tapered outer diameter and the rotor axial passageway, wherein the first and second portions define openings having different cross-sectional areas where the first passageway portion is located in a first portion of the rotor and a second passageway portion is located in the second portion of the rotor and the difference in cross-sectional areas between the first passageway portion and second passageway portion and the amount of taper of the outer diameter of the rotor are related according to the Landrum relation.