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167 条记录 (耗时 0.019 秒)

    CONSTRUCTION MACHINE
    1.
    发明公开
    CONSTRUCTION MACHINE 审中-公开

    公开(公告)号：EP3358200A1

    公开(公告)日：2018-08-08

    申请号：EP15905353.7

    申请日：2015-09-29

    申请人： Hitachi Construction Machinery Co., Ltd.

    发明人： HIJIKATA Seiji ,  ISHIKAWA Kouji ,  IMURA Shinya

    IPC分类号： F15B21/14 ,  E02F9/22

    CPC分类号： E02F9/2225 ,  E02F3/32 ,  E02F3/425 ,  E02F9/0883 ,  E02F9/2004 ,  E02F9/22 ,  E02F9/2217 ,  E02F9/2267 ,  E02F9/2271 ,  E02F9/2285 ,  E02F9/2292 ,  E02F9/2296 ,  F15B13/06 ,  F15B21/14 ,  F15B2211/46 ,  F15B2211/5153

    摘要： Provided is a construction machine allowing regeneration of a return hydraulic fluid at the time of both a boom raising operation and a boom lowering operation with a small number of valves, making it possible to secure a satisfactory operability at the time of both the boom raising operation and the boom lowering operation.
    The construction machine includes: a first hydraulic actuator; a second hydraulic actuator; a tank; and a first hydraulic pump supplying a hydraulic fluid to the second hydraulic actuator, the construction machine further including: a return hydraulic fluid selection device selecting a supply source of a return hydraulic fluid generated at a time of a raising operation or a lowering operation of the first hydraulic actuator and discharging the return hydraulic fluid; a regeneration line supplying the hydraulic fluid discharged from the return hydraulic fluid selection device to a portion between the second hydraulic actuator and the first hydraulic pump to regenerate the hydraulic fluid; a discharge line discharging the hydraulic fluid discharged from the return hydraulic fluid selection device to the tank; and a regeneration/discharge flow rate adjustment device capable of adjusting a flow rate of the hydraulic fluid flowing through the regeneration line and a flow rate of the hydraulic fluid flowing through the discharge line.

    CONTROL OF SUPPLY OF AIR TO A PNEUMATIC VALVE ACTUATOR
    3.
    发明公开
    CONTROL OF SUPPLY OF AIR TO A PNEUMATIC VALVE ACTUATOR 有权
    空气对气动阀门执行机构的供气控制

    公开(公告)号：EP3252360A1

    公开(公告)日：2017-12-06

    申请号：EP16172786.2

    申请日：2016-06-03

    申请人： Alfa Laval Corporate AB

    发明人： REHHOFF, Kenneth ,  ANDERSEN, Jens Folkmar

    IPC分类号： F16K31/122

    CPC分类号： F16K31/1221 ,  F15B11/06 ,  F15B2211/3058 ,  F15B2211/50518 ,  F15B2211/5153 ,  F15B2211/655 ,  F15B2211/7052 ,  F15B2211/8855

    摘要： A technology is disclosed for controlling the function of a pneumatic valve actuator (14). The piston (22) of the valve actuator (14) is biased to be in first state (44) and move to a second state (46) when pressurized. A conduit (28) connects the pressure side (24) and non-pressure sides (26) of the valve actuator (14) for supplying the non-pressure side (26) of the valve actuator (14) with gas from the pressure side (24) of the valve actuator (14). A control valve (30) is connected to the conduit (28) for controlling a release of gas from the pressure side (24) of the valve actuator (14). The valve controller (14) also has pressure-relief valve (32) connected to the conduit (28) between the control valve (30) and the non-pressure side (26) of the valve actuator (14) for reducing the pressure in the conduit (28).

    摘要翻译： 公开了一种用于控制气动阀致动器（14）的功能的技术。 阀致动器（14）的活塞（22）被偏压而处于第一状态（44）并且在加压时移动到第二状态（46）。 导管（28）连接阀门致动器（14）的压力侧（24）和非压力侧（26），用于为阀门致动器（14）的非压力侧（26）供应来自压力侧 （14）的所述开口（24）。 控制阀（30）连接到导管（28），用于控制从阀致动器（14）的压力侧（24）释放气体。 阀控制器（14）还具有连接到控制阀（30）和阀致动器（14）的非压力侧（26）之间的导管（28）的减压阀（32），用于降低 导管（28）。

    HYDRAULIC VALVE WITH PRESSURE LIMITER
    4.
    发明公开
    HYDRAULIC VALVE WITH PRESSURE LIMITER 审中-公开
    带限压器的液压阀

    公开(公告)号：EP3150862A1

    公开(公告)日：2017-04-05

    申请号：EP16200508.6

    申请日：2010-11-22

    申请人： Parker-Hannifin Corporation

    发明人： COOLIDGE, Gregory

    IPC分类号： F15B13/04 ,  G05D16/10 ,  F15B13/02

    CPC分类号： G05D16/10 ,  F15B13/026 ,  F15B13/0417 ,  F15B2211/3054 ,  F15B2211/40569 ,  F15B2211/50554 ,  F15B2211/5153 ,  F15B2211/55 ,  F15B2211/653 ,  Y10T137/7762 ,  Y10T137/7784

    摘要： An assembly of valve sections 10 includes an inlet section 12, an outlet section 14, a working section 16, and a working section 18. The working section 16 is a conventional pressure compensated working section. The working section 18 includes a directional control valve 21, a pressure compensator valve 50, and a pressure limiter valve 52. The valves 50 and 52 can be of integral construction, such that each is an essential part to complete the other. The pressure compensator valve 50 includes a pressure compensator spool 60 movable between an opened position (Figures 2 and 5) and a closed position (Figures and 6) in response to a pressure differential across the spool. The pressure limiter valve 52 includes a pressure limiter spool 76 that moves to an open position to change the pressure differential and close the pressure compensator valve when a selected limit pressure is reached.

    摘要翻译： 阀部分10的组件包括入口部分12，出口部分14，工作部分16和工作部分18.工作部分16是传统的压力补偿工作部分。 工作部分18包括方向控制阀21，压力补偿阀50和压力限制阀52.阀50和52可以是整体结构，使得每个阀都是完成另一个的基本部分。 压力补偿阀50包括压力补偿器阀芯60，其可响应于阀芯上的压力差而在打开位置（图2和5）和关闭位置（图6和6）之间移动。 压力限制器阀52包括压力限制器阀芯76，该压力限制器阀芯76移动到打开位置以改变压力差并且在达到选定极限压力时关闭压力补偿器阀。

    HYDRAULIC VALVE WITH PRESSURE LIMITER
    7.
    发明公开
    HYDRAULIC VALVE WITH PRESSURE LIMITER 有权
    HYDRAULIKVENTIL MIT DRUCKBEGRENZER

    公开(公告)号：EP2547914A1

    公开(公告)日：2013-01-23

    申请号：EP10782513.5

    申请日：2010-11-22

    申请人： Parker-Hannifin Corporation

    发明人： COOLIDGE, Gregory

    IPC分类号： F15B13/04 ,  G05D16/10 ,  F15B13/02

    CPC分类号： G05D16/10 ,  F15B13/026 ,  F15B13/0417 ,  F15B2211/3054 ,  F15B2211/40569 ,  F15B2211/50554 ,  F15B2211/5153 ,  F15B2211/55 ,  F15B2211/653 ,  Y10T137/7762 ,  Y10T137/7784

    摘要： An assembly of valve sections 10 includes an inlet section 12, an outlet section 14, a working section 16, and a working section 18. The working section 16 is a conventional pressure compensated working section. The working section 18 includes a directional control valve 21, a pressure compensator valve 50, and a pressure limiter valve 52. The valves 50 and 52 are of integral construction, such that each is an essential part to complete the other. The pressure compensator valve 50 includes a pressure compensator spool 60 movable between an opened position (Figures 2 and 5) and a closed position (Figures 4 and 6) in response to a pressure differential across the spool. The pressure limiter valve 52 includes a pressure limiter spool 76 that moves to an open position to change the pressure differential and close the pressure compensator valve when a selected limit pressure is reached.

    摘要翻译： 阀部件的组件包括入口部分，出口部分，工作部分和工作部分。 工作部分是传统的压力补偿工作部分。 工作部分包括方向控制阀，压力补偿阀和限压阀。 这些阀门是一体的结构，每个阀门是完成另一个阀门的重要部件。 压力补偿阀包括压力补偿器阀芯，其响应于阀芯上的压力差在打开位置和关闭位置之间运动。 压力限制阀包括压力限制阀芯，当限制压力达到选定的压力时，压力限制器阀芯移动到打开位置以改变压差并关闭压力补偿阀。

    Hydraulic circuit for heavy equipment having variable control device
    8.
    发明公开
    Hydraulic circuit for heavy equipment having variable control device 有权
    用于具有可变控制装置的重型设备的液压回路

    公开(公告)号：EP2020511A3

    公开(公告)日：2012-09-05

    申请号：EP08013308.5

    申请日：2008-07-24

    申请人： Volvo Construction Equipment Holding Sweden AB

    发明人： Son, Young Jin

    IPC分类号： F15B11/042 ,  E02F3/96 ,  E02F9/22 ,  F15B11/028

    CPC分类号： E02F9/2296 ,  E02F3/963 ,  E02F9/2228 ,  F15B11/028 ,  F15B2211/50518 ,  F15B2211/5153 ,  F15B2211/5159 ,  F15B2211/7053

    摘要： The hydraulic circuit includes at least one variable displacement hydraulic pump (1); a main relief valve (2) installed on an upstream side of a discharge flow path of the hydraulic pump; an option attachment (3) connected to the hydraulic pump (1); a main control valve (5) installed in a flow path between the hydraulic pump (1) and the option attachment (3); port relief valves (12,13), installed inside the main control valve (5), for being proportionally controlled so as to variably control relief pressure required for the option attachment in accordance with pilot signal pressure inputted from an outside; and a proportional relief valve (14), installed outside the main control valve (5), for variably controlling the pilot signal pressure inputted to the port relief valves (12,13) in accordance with an electric signal inputted from an outside.