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99 条记录 (耗时 0.03 秒)

    Hydraulic drive system
    31.
    发明授权
    Hydraulic drive system 失效
    液压驱动系统

    公开(公告)号：US5152143A

    公开(公告)日：1992-10-06

    申请号：US449848

    申请日：1989-12-21

    申请人： Yusuke Kajita ,  Toichi Hirata ,  Genroku Sugiyama

    发明人： Yusuke Kajita ,  Toichi Hirata ,  Genroku Sugiyama

    IPC分类号： E02F9/22 ,  F15B11/00 ,  F15B11/05

    CPC分类号： E02F9/2246 ,  E02F9/2228 ,  E02F9/2235 ,  E02F9/2292 ,  E02F9/2296

    摘要： A hydraulic drive system comprising a prime mover (21), a hydraulic pump (22) driven by the prime mover, a plurality of hydraulic actuators (23-28) driven by hydraulic fluid supplied from the hydraulic pump, a plurality of flow control valves (29-34) for controlling flow of the hydraulic fluid supplied to the actuators, and a plurality of pressure compensating valve (35-40) for controlling respective differential pressures across the respective flow control valves, in which each of the pressure compensating valves applies a control force (f-F.sub.c) in a valve opening direction for setting a target value of the differential pressure across the flow control valve. There are provided a first detector (60) for detecting the target rotational speed (N.sub.0) of the prime mover (21), and controllers (61, 62, 63) for controlling the control force on the basis of the target rotational speed detected by at least the first detector such that the control force (f-F.sub.c) decreases in accordance with a decrease in the target rotational speed.

    摘要翻译： PCT No.PCT / JP89 / 00893 Sec。 371日期1989年12月21日第 102（e）1989年12月21日PCT PCT 1989年8月31日PCT公布。 出版物WO90 / 02268 日本1990年8月3日。一种液压驱动系统，包括原动机（21），由原动机驱动的液压泵（22），多个液压致动器（23-28），由液压泵 ，用于控制供应到致动器的液压流体的流动的多个流量控制阀（29-34）和用于控制横跨各个流量控制阀的相应差压的多个压力补偿阀（35-40），其中 每个压力补偿阀在阀打开方向上施加控制力（f-Fc），以设定跨过流量控制阀的差压的目标值。 提供了用于检测原动机（21）的目标转速（N0）的第一检测器（60）和用于根据由原动机（21）检测到的目标转速控制控制力的控制器（61,62,63） 至少第一检测器，使得控制力（f-Fc）根据目标转速​​的降低而减小。

    Pressure compensating valve spool positioned by difference in pressure receiving areas for load and inlet pressures
    32.
    发明授权
    Pressure compensating valve spool positioned by difference in pressure receiving areas for load and inlet pressures 失效
    压力补偿阀由压力接收区域负载和入口压力的差异定位

    公开(公告)号：US5152140A

    公开(公告)日：1992-10-06

    申请号：US640440

    申请日：1991-02-06

    申请人： Toichi Hirata ,  Hideaki Tanaka ,  Genroku Sugiyama ,  Yusuke Kajita ,  Kazunori Nakamura

    发明人： Toichi Hirata ,  Hideaki Tanaka ,  Genroku Sugiyama ,  Yusuke Kajita ,  Kazunori Nakamura

    IPC分类号： E02F9/22 ,  F15B13/04

    CPC分类号： F15B13/0417 ,  E02F9/2232 ,  E02F9/2296 ,  Y10T137/7858

    摘要： A hydraulic drive system has a hydraulic pump (1), an actuator (2), a flow control valve (5) disposed between the hydraulic pump and the actuator, a pressure compensating valve (8; 8A; 8B) having a valve spool (23; 23A; 23B) that controls the differential pressure (Pz-PLS) across the flow control valve, and a pump delivery rate control device (9) for controlling a flow rate of the hydraulic fluid delivered from the hydraulic pump dependent on a differential pressure (Pd-PLS) between a pump pressure and a load pressure of the actuator. The pressure compensating valve has a first control chamber (30; 30A) subjected to the load pressure (PLS) of the actuator such that the load pressure acts on a first pressure receiving section (28; 28A) of the valve spool to urge the valve spool in the valve-opening direction, a second control chamber (29; 29A) subjected to the inlet pressure (Pz) of the flow control valve such that the inlet pressure acts on a second pressure receiving section (27; 27A) of the valve spool to urge the valve spool in the valve-closing direction, and a target differential pressure setting arrangement (31, 50, 51; 31B, 51) for urging the valve spool in the valve-opening direction. A damping capability to the actuator (2) is provided by setting pressure receiving area (Az) of the second pressure receiving section (27; 27A) to be greater than a pressure receiving area (ALS) of the first pressure receiving section (28; 28A).

    摘要翻译： PCT No.PCT / JP90 / 01310 Sec。 371日期1991年2月6日 102（e）日期1991年2月6日PCT 1990年10月11日PCT PCT。 出版物WO91 / 05958 日期：1991年5月2日。液压驱动系统具有液压泵（1），致动器（2），设置在液压泵和致动器之间的流量控制阀（5），压力补偿阀（8; 8A; 8B ）具有控制跨过流量控制阀的差压（Pz-PLS）的阀芯（23; 23A; 23B）和用于控制从所述流量控制阀输送的液压流体的流量的泵输送速率控制装置（9） 液压泵取决于泵压力和执行器的负载压力之间的压差（Pd-PLS）。 压力补偿阀具有受到致动器的负载压力（PLS）的第一控制室（30; 30A），使得负载压力作用在阀芯的第一压力接收部分（28; 28A）上，以推动阀 阀门处于阀打开方向，第二控制室（29; 29A）经受流量控制阀的入口压力（Pz），使得入口压力作用在阀的第二压力接收部分（27; 27A）上 阀芯沿阀关闭方向推压阀芯，以及用于沿阀打开方向推压阀芯的目标压差设定装置（31,50,51; 31B，51）。 通过将第二受压部分（27; 27A）的压力接收面积（Az）设定为大于第一压力接收部分（28; 27）的受压面积（ALS）来提供致动器（2）的阻尼能力。 28A）。

    Valve apparatus
    33.
    发明授权
    Valve apparatus 失效
    阀门装置

    公开(公告)号：US5140815A

    公开(公告)日：1992-08-25

    申请号：US427126

    申请日：1989-10-23

    申请人： Genroku Sugiyama ,  Toichi Hirata ,  Hideaki Tanaka ,  Kazumasa Yuasa ,  Yusaku Nozawa

    发明人： Genroku Sugiyama ,  Toichi Hirata ,  Hideaki Tanaka ,  Kazumasa Yuasa ,  Yusaku Nozawa

    IPC分类号： F15B13/04 ,  F16K15/18

    CPC分类号： F15B13/0405 ,  F16K15/18

    摘要： A hydraulic actuator is driven by hydraulic fluid discharged from a hydraulic pump, for controlling driving of the actuator. A valve has a meter-in circuit for introducing the hydraulic fluid discharged from the hydraulic pump into the actuator. The valve also has a meter-out circuit for returning fluid from the actuator, into a tank. The meter-out circuit is provided with a main valve for controlling the return fluid from the actuator, and a pilot circuit including a variable restrictor. When the main valve is closed, the pilot circuit is closed, and when the main valve is open, its degree of opening varies depending upon an amount of restriction of the variable restrictor. A controller varies the amount of restriction of the variable restrictor valve in accordance with the driving pressure of the actuator.

    摘要翻译： PCT No.PCT / JP89 / 00184 Sec。 371日期：1989年10月23日 102（e）日期1989年10月23日PCT提交1989年2月23日PCT公布。 第WO89 / 08213号公报。 日期1989年9月8日。液压致动器由从液压泵排出的液压流体驱动，用于控制致动器的驱动。 阀具有用于将从液压泵排出的液压流体引入致动器的计量回路。 阀还具有用于将流体从致动器返回到罐中的出口回路。 出口电路设置有用于控制来自致动器的返回流体的主阀和包括可变节流器的先导电路。 当主阀关闭时，先导电路关闭，当主阀打开时，其开度根据可变节流器的限制量而变化。 控制器根据致动器的驱动压力改变可变节流阀的限制量。

    Hydraulic driving apparatus
    34.
    发明授权
    Hydraulic driving apparatus 失效
    液压驱动装置

    公开(公告)号：US5083430A

    公开(公告)日：1992-01-28

    申请号：US439389

    申请日：1989-11-13

    申请人： Toichi Hirata ,  Hideaki Tanaka ,  Genroku Sugiyama ,  Yusaku Nozawa

    发明人： Toichi Hirata ,  Hideaki Tanaka ,  Genroku Sugiyama ,  Yusaku Nozawa

    IPC分类号： E02F9/22 ,  F15B11/16 ,  F15B13/04

    CPC分类号： F15B11/165 ,  E02F9/2225 ,  E02F9/2232 ,  E02F9/2296 ,  F15B11/163 ,  F15B13/0417 ,  F15B2211/20553 ,  F15B2211/253 ,  F15B2211/30505 ,  F15B2211/30535 ,  F15B2211/3055 ,  F15B2211/3111 ,  F15B2211/324 ,  F15B2211/351 ,  F15B2211/353 ,  F15B2211/6051 ,  F15B2211/6054 ,  F15B2211/7053 ,  F15B2211/7135 ,  Y10T137/87193

    摘要： A hydraulic driving apparatus has at least one hydraulic pump, a plurality of hydraulic actuators driven by hydraulic fluid discharged from the hydraulic pump, a tank to which return fluid from the plurality of hydraulic actuators is discharged, and a flow control valve associated with each of the plurality of hydraulic actuators. The flow control valve has a first main variable restrictor for controlling flow rate of the hydraulic fluid supplied from the hydraulic pump to the hydraulic actuator, and a second main variable restrictor for controlling flow rate of the return fluid discharged from the hydraulic actuator to the tank. A pump control operative in response to the difference between the discharge pressure of the hydraulic pump and the maximum load pressure of the hydraulic actuators normally controls the discharge rate of the hydraulic pump so that the pump discharge pressure is raised more than the maximum load pressure by a predetermined value. A first pressure-compensating control operates with a valve determined by the difference between the pump discharge pressure and the maximum load pressure, the value acting as a compensating differential-pressure target value, and pressure-compensation-controls the first main variable restrictor of the flow control valve. A second pressure-compensating control is operative with a value determined by the pressure difference across the first main variable restrictor, the valve acting as a compensating differential-pressure target value, for controlling the second main variable restrictor of the flow control valve.

    Traveling hydraulic working machine
    37.
    发明授权
    Traveling hydraulic working machine 有权
    行走液压作业机

    公开(公告)号：US07493978B2

    公开(公告)日：2009-02-24

    申请号：US10541450

    申请日：2004-07-30

    申请人： Tsuyoshi Nakamura ,  Genroku Sugiyama ,  Kazunori Nakamura ,  Toichi Hirata

    发明人： Tsuyoshi Nakamura ,  Genroku Sugiyama ,  Kazunori Nakamura ,  Toichi Hirata

    IPC分类号： F02D29/04

    CPC分类号： F02D41/021 ,  E02F9/2246 ,  F02D29/02 ,  F02D31/001

    摘要： A traveling hydraulic working machine has a target revolution speed of an engine commanded by an input and sensors for detecting an operating situation of a hydraulic actuator and an operating situation of a traveling system. A prime-mover revolution speed control modifies the target revolution speed of the prime mover when the operating situation of the hydraulic actuator and the operating situation of the traveling system come into respective particular states, and controls the revolution speed of the prime mover, With the traveling hydraulic working machine, in the combined operation of traveling and working a hydraulic actuator, work can be performed on the basis of the engine revolution speed intended by an operator. When a working load varies, the engine revolution speed is automatically controlled.

    摘要翻译： 行驶液压作业机具有由输入装置引导的发动机的目标转速以及用于检测液压致动器的运转状况的传感器和行驶系统的运转状况。 原动机转速控制可以在液压执行器的运行状态和行驶系统的运行状态达到各自的特定状态时修改原动机的目标转速，并控制原动机的转速。 行驶液压作业机，在组合操作液压执行机构的同时进行工作时，可以根据操作者的发动机转速进行工作。 当工作负载变化时，发动机转速自动控制。

    Traveling hydraulic working machine
    39.
    发明申请
    Traveling hydraulic working machine 有权
    行走液压作业机

    公开(公告)号：US20060201147A1

    公开(公告)日：2006-09-14

    申请号：US10543920

    申请日：2004-11-15

    申请人： Tsuyoshi Nakamura ,  Kazunori Nakamura ,  Toichi Hirata ,  Genroku Sugiyama ,  Kentaro Itoga

    发明人： Tsuyoshi Nakamura ,  Kazunori Nakamura ,  Toichi Hirata ,  Genroku Sugiyama ,  Kentaro Itoga

    IPC分类号： F16D31/02

    CPC分类号： B60W10/30 ,  B66F9/0655 ,  B66F9/20 ,  E02F9/2235 ,  E02F9/2296 ,  F04B49/065 ,  F04B2203/0603 ,  F16H2059/467

    摘要： A modification torque computing unit 83 computes a modification torque ΔT and a torque converter speed ratio e is computed from input and output revolution speeds of a torque converter 31. A first determination coefficient α corresponding to the speed ratio e, and a second determination coefficient β corresponding to a pump pressure are computed. A selector 87 selects the smaller one of these coefficients as a determination coefficient γ, and the modification torque ΔT is multiplied by γ to provide a modification torque ΔTA. An adder 89 adds the modification torque ΔTA (negative value) to a pump base torque TR to provide a modified pump base torque TRA, whereby a maximum pump absorption torque TRA is controlled so as to become TRA. The maximum pump torque reducing control can then be performed while accurately confirming a work situation during the combined operation of travel and a working actuator.

    摘要翻译： 修改扭矩计算单元83计算修正转矩DeltaT，并且由变矩器31的输入和输出转速计算变矩器速度比e。 计算对应于速比e的第一确定系数α和对应于泵压的第二确定系数β。 选择器87选择这些系数中的较小的一个作为确定系数γ，并且将修正转矩DeltaT乘以伽玛以提供修改转矩DeltaTA。 加法器89将修正转矩DeltaTA（负值）与泵基本转矩TR相加以提供改进的泵基本转矩TRA，由此控制最大泵吸收转矩TRA以变成TRA。 然后可以在行驶和工作执行器的组合操作期间精确地确认工作情况的同时执行最大泵扭矩降低控制。