Hydraulic recovery device
    2.
    发明授权
    Hydraulic recovery device 失效
    液压回收装置

    公开(公告)号:US5442912A

    公开(公告)日:1995-08-22

    申请号:US256557

    申请日:1994-07-11

    摘要: A hydraulic recovery device in a hydraulic system having a pump (1) driving a plurality of actuators through a plurality of control valves (2, 3), the hydraulic recovery device comprising a variable resistance valve (6, 60) in a first line being controlled by a control signal (Px), a third line, a check valve (7) disposed in the third line for allowing the hydraulic fluid to flow only in a direction from the first line toward the second line. The hydraulic recovery device further comprises (a) detecting apparatus (101; 106; 102a, 102b; 103a, 103b) for detecting a condition variable (Pd; Ph; Pia1, Pia2; Pib1, Pib2) related to an operation of the actuator (4); (b) control apparatus (100; 100A-100H) for receiving a signal from the detecting apparatus and producing a drive signal (i; i*) corresponding to the condition variable based on a relationship stored therein in advance; and (c) control signal generating apparatus (105) for receiving the drive signal and producing the control signal (Px) corresponding to the drive signal, whereby the device can optionally set a characteristic of the variable resistance valve and can avoid abrupt changes in a recovered flow rate.

    摘要翻译: PCT No.PCT / JP93 / 01763 Sec。 371日期:1994年7月11日 102(e)日期1994年7月11日PCT 1993年12月3日PCT PCT。 第WO94 / 13959号公报 日期:1994年6月23日。液压系统中的液压回收装置,具有通过多个控制阀(2,3)驱动多个致动器的泵(1),所述液压回收装置包括可变阻力阀(6, 60)由控制信号(Px)控制,第三线,设置在第三线中的止回阀(7),用于允许液压流体仅沿着从第一线路朝向第二线路的方向流动 。 液压回收装置还包括(a)检测装置(101; 106; 102a,102b; 103a,103b),用于检测与致动器的操作有关的状态变量(Pd; Ph; Pia1,Pia2; Pib1,Pib2) 4); (b)控制装置(100; 100A-100H),用于从所述检测装置接收信号,并且根据预先存储的关系产生与所述条件变量相对应的驱动信号(i; i *); 和(c)用于接收驱动信号并产生对应于驱动信号的控制信号(Px)的控制信号发生装置(105),由此该装置可以可选地设置可变电阻阀的特性,并且可以避免 回收流量。

    Hydraulic drive system for construction machine

    公开(公告)号:US5392539A

    公开(公告)日:1995-02-28

    申请号:US75588

    申请日:1993-06-15

    IPC分类号: E02F9/22 F16D31/02 G06F15/20

    CPC分类号: E02F9/2239 E02F9/2292

    摘要: In a hydraulic drive system for a construction machine, first flow control mechanism includes first and second flow control valves (11a, 11b) and first interlock mechanism (54, 55) for interlocking the first and second flow control valves with first directional control mechanism (7), and second flow control mechanism includes third and fourth flow control valves (12a, 12b) and second interlock mechanism (56, 57) for interlocking the third and fourth flow control valves with second directional control mechanism (9). First pressure control mechanism includes at least first pressure control valve (13a) operated in response to a pressure signal in a valve-closing direction, and second pressure control mechanism includes only second pressure control valve (15b) operated in response to the pressure signal in a valve-closing direction. A first hydraulic pump (25a) is connected to a first actuator (19) via the first flow control valve (11a), the first pressure control valve (13a) and the first directional control mechanisms (7), and a second hydraulic pump ( 25b) is connected to the first actuator (19) via the second flow control valve (11b) and the first directional control mechanism (7). The first hydraulic pump (25a) is also connected to a second actuator (21) via the third flow control valve (12a) and the second directional control mechanism (9) in parallel to the first actuator (19) without passing any pressure control valve, and the second hydraulic pump (25b) is also connected to the second actuator (21) via the fourth flow control valve (12b), the second pressure control valve (15b) and the second directional control mechanism (9) in parallel to the first actuator (19).

    Hydraulic control valve apparatus and hydraulic drive system
    4.
    发明授权
    Hydraulic control valve apparatus and hydraulic drive system 失效
    液压控制阀装置和液压驱动系统

    公开(公告)号:US5433076A

    公开(公告)日:1995-07-18

    申请号:US244038

    申请日:1994-05-16

    CPC分类号: E02F9/2225 F15B13/0417

    摘要: A hydraulic control valve apparatus including a flow control valve having a pair of variable throttles, a feeder passage, a pair of load passages, directional control valve devices comprise a seat valve having a seat valve body movably disposed in a housing to form an auxiliary variable throttle in the feeder passage, and a control variable throttle (33) formed in the seat valve body for changing an opening area in accordance with an amount of movement of the seat valve body; (b) a pilot line (24, 29-31, 35-37) for communicating a portion (7C) of the feeder passage upstream of the auxiliary variable throttle with a downstream portion (7A, 7B) of the feeder passage through the control variable throttle to determine the amount of movement of the seat valve body in accordance with a flow rate of the hydraulic fluid passing through the pilot line; and (c) pilot flow control (400; 401; 403; 405; 406; 407; 408) having a pilot variable throttle (45) disposed in the pilot line and input (800; 52-59; 159, 54-59; 231A, 231B, 251, 252) for receiving a flow restricting signal whereby an opening area of the pilot variable throttle is changed in accordance with the received flow restricting signal to control a flow rate of the hydraulic fluid passing through the pilot line.

    摘要翻译: PCT No.PCT / JP93 / 01558 Sec。 371日期1994年5月16日 102(e)日期1994年5月16日PCT提交1993年10月28日PCT公布。 公开号WO94 / 10456 日期:1994年5月11日。一种液压控制阀装置,包括具有一对可变节流阀的流量控制阀,进料通道,一对负载通道,方向控制阀装置,其包括座阀,该阀座具有可移动地设置在 在所述供给通道中形成辅助可变节流阀,以及形成在所述座阀主体中的控制可变节流阀(33),用于根据所述座阀主体的移动量来改变开口面积; (b)用于将辅助可变节流阀上游的供料通道的一部分(7C)与馈送通道的下游部分(7A,7B)通过控制通道的控制线(24,29-31,35-37) 可变节气门,以根据通过先导管线的液压流体的流量来确定座阀体的运动量; 以及(c)具有设置在所述先导管线中的先导可变节流阀(45)的输入(800; 52-59; 159,54-59;和(c))先导流量控制(400; 401; 403; 405; 231A,231B,251,252),用于接收流量限制信号,由此根据所接收的流量限制信号改变先导可变节流阀的开口面积,以控制通过先导管线的液压流体的流量。

    Hydraulic circuit system for hydraulic excavator
    5.
    发明授权
    Hydraulic circuit system for hydraulic excavator 失效
    液压挖掘机液压回路系统

    公开(公告)号:US5673558A

    公开(公告)日:1997-10-07

    申请号:US596296

    申请日:1996-02-13

    摘要: For enabling a boom to be smoothly raised during the triple combined operation of boom-up, arm-crowd and bucket-crowd in a hydraulic circuit system for a hydraulic excavator, in a first valve group of a hydraulic valve apparatus (12), a variable throttle valve (70) is installed in a feeder passage (32) of a bucket directional control valve (21) downstream of a load check valve (32a), and a secondary pressure C as a boom-up operation command is introduced through a line (71) to a pilot control sector (70a) of the variable throttle valve (70) which sector operates in the throttling direction, so that when the secondary pressure C is 0 or small, the variable throttle valve (70) is fully opened and, as the secondary pressure C increases, an opening area of the variable throttle valve (70) is reduced to restrict the flow rate of a hydraulic fluid supplied through the bucket directional control valve (21).

    摘要翻译: PCT No.PCT / JP95 / 01258 Sec。 371日期1996年2月13日 102(e)日期1996年2月13日PCT提交1995年6月23日PCT公布。 公开号WO96 / 00820 日期1996年1月11日为了在液压挖掘机的液压回路系统中,在液压阀装置的第一阀组中,在起重臂,悬臂和斗斗的三重组合操作期间能够平稳地升高起重臂 (12)中,可变节流阀(70)安装在负载止回阀(32a)下游的铲斗方向控制阀(21)的供给通路(32)中,作为动臂上升操作的二次压力C 命令通过管线(71)引导到可变节流阀(70)的先导控制扇区(70a),该扇区在节流方向上操作,使得当二次压力C为0或小时,可变节流阀 70)完全打开,并且随着二次压力C增加,可变节流阀(70)的开口面积减小以限制通过铲斗方向控制阀(21)供给的液压流体的流量。

    Hydraulic drive system for hydraulic working machines
    6.
    发明授权
    Hydraulic drive system for hydraulic working machines 失效
    液压工程机液压驱动系统

    公开(公告)号:US5447027A

    公开(公告)日:1995-09-05

    申请号:US302786

    申请日:1994-09-12

    摘要: A hydraulic drive system comprises a controller (12) and several condition sensors. A boom-up target flow rate setting section determines a boom-up target flow rate based on signals from a pressure sensor (11) and a rotational speed meter (16), a pump delivery rate detecting section determines a pump delivery rate based on signals from a tilt angle sensor (15) and the rotational speed meter (16), a differential pressure detecting section and a center bypass flow rate calculating section determine a center bypass flow rate based on signals from pressure sensors (9, 10), a boom cylinder calculating section determines a boom cylinder flow rate from the pump delivery rate and the center bypass flow rate, and a first pump target displacement volume calculating section calculates a first pump target tilt angle .theta..sub.1 in accordance with the difference between the boom-up target flow rate and the boom cylinder flow rate. In this case, .theta..sub.1 is larger than a second pump target tilt angle .theta..sub.2 for negative control and is selected by a maximum value selecting section. Then, a minimum value selecting section selects the smaller one of .theta..sub.1 and a maximum tilt angle .theta..sub.max determined with horsepower control, and drive signal generating section outputs a corresponding target current to a solenoid proportional valve (13) for driving a piston (6a) of a regulator (6) to the right in FIG. 4.

    摘要翻译: PCT No.PCT / JP94 / 00464 Sec。 371日期1994年9月12日 102(e)1994年9月12日PCT PCT 1994年3月23日PCT公布。 出版物WO94 / 21925 日期1994年9月29日。液压驱动系统包括控制器(12)和几个状态传感器。 动臂上升目标流量设定部基于来自压力传感器(11)和转速计(16)的信号来确定动臂上升目标流量,泵输送速度检测部基于信号来确定泵输送速度 从倾斜角传感器(15)和转速计(16),差压检测部和中心旁通流量计算部基于来自压力传感器(9,10),吊杆(9,10)的信号来确定中心旁通流量 气缸计算部根据泵输送速度和中心旁通流量来确定起重臂液压缸流量,第一泵目标排量体积计算部根据悬臂上升目标的差计算第一泵目标倾斜角θ1 流量和动臂缸流量。 在这种情况下,θ1大于用于负控制的第二泵目标倾斜角θ2,并且由最大值选择部选择。 然后,最小值选择部选择通过马力控制确定的θ1中的较小值和最大倾斜角θmax,驱动信号生成部将用于驱动活塞(6a)的电磁比例阀(13)输出对应的目标电流 )在图1中右侧的调节器(6)。 4。

    Tournament oil path constituting apparatus
    9.
    发明授权
    Tournament oil path constituting apparatus 有权
    锦标赛油路构成装置

    公开(公告)号:US6161586A

    公开(公告)日:2000-12-19

    申请号:US267957

    申请日:1999-03-12

    IPC分类号: F15B11/16 F15B13/00 F15B13/08

    摘要: A tournament oil path constituting apparatus in which while a laminated block is constituted by laminating a number of oil path plates, a number of shuttle valve holes and connection grooves made continuous to the shuttle valve holes are formed at overlap faces of the oil path plates, shuttle valves are integrated to the shuttle valve holes, introductory oil paths communicating with the shuttle valve holes are formed at both of the oil path plates formed with the shuttle valve holes and the oil path plates having match faces on sides of the shuttle valve holes and a high pressure oil is selected by the shuttle valves from pressure oils conducted both of the introductory oil paths and conducted to the connection grooves. The tournament oil path constituting apparatus also including a number of main paths penetrating the number of laminated oil path plates and branch grooves branched from the main paths.

    摘要翻译: 一种比赛油路构成装置,其中,通过层叠多个油路板而构成层叠块,在油路板的重叠面形成有多个往复阀孔和与梭阀孔连续的连接槽, 梭阀集成到梭阀孔中,与形成有梭阀孔的两个油路板和在梭阀孔的侧面上具有匹配面的油路板形成与梭阀孔连通的引导油路, 高压油由穿梭阀由导入两个导入油路的压力油选择并传导到连接槽。 比赛油路构成装置还包括穿过层叠油路板的数量的主要路径和从主路径分支的分支槽。

    Auto-acceleration system for prime mover of hydraulic construction
machine and control system for prime mover and hydraulic pump
    10.
    发明授权
    Auto-acceleration system for prime mover of hydraulic construction machine and control system for prime mover and hydraulic pump 有权
    液压工程机械原动机自动加速系统,原动机和液压泵控制系统

    公开(公告)号:US5930996A

    公开(公告)日:1999-08-03

    申请号:US164365

    申请日:1998-10-01

    摘要: In the arm-crowding or track operation, a calculating portion (700d2 or 700d4) calculates a modification gain (KAC or KTR) depending on an operation pilot pressure and a calculating portion (700g) calculates a decrease modification (DND) based on the KAC or KTR, while a calculating portion (700m or 700p) calculates a modification gain (KACH or KTRH) depending on an operation pilot pressure and calculating portions (700q-700s) calculate an increase modification (DNH) based on the KACH or KTRH. A reference target engine revolution speed NR0 is modified using the DND and DNH. In other operations than the arm-crowding and track operations, NR0 is modified using only the decrease modification (DND) calculated from the modification gain just depending on the operation pilot pressure. In the operation where an engine revolution speed is desired to become higher as an actuator load increases, the engine revolution speed can be controlled in accordance with change of the actuator load as well. In other operations, the engine revolution speed can be controlled just depending on the direction and input amount in and by which corresponding operation instructing apparatus is operated.

    摘要翻译: 在手臂拥挤或轨道操作中,计算部分(700d2或700d4)根据操作先导压力计算修正增益(KAC或KTR),并且计算部分(700g)基于KAC计算减小修改(DND) 或KTR,而计算部分(700m或700p)根据操作先导压力计算修正增益(KACH或KTRH),并且计算部分(700q-700s)基于KACH或KTRH计算增加修改(DNH)。 使用DND和DNH修改参考目标发动机转速NR0。 在除了拥挤和跟踪操作之外的其他操作中,NR0仅使用根据操作先导压力从修改增益计算的减少修改(DND)进行修改。 在致动器负载增加时希望发动机转速变高的操作中,也可以根据致动器负载的变化来控制发动机转速。 在其他操作中,可以根据相应的操作指示装置的操作方向和输入量来控制发动机转速。