公开(公告)号：US4199942A

公开(公告)日：1980-04-29

申请号：US946915

申请日：1978-09-28

申请人： Leslie J. Kasper

发明人： Leslie J. Kasper

IPC分类号： E02F9/22 ,  F15B11/028 ,  F15B11/05 ,  F15B11/06 ,  F15B21/08 ,  F15B11/16 ,  F16H39/46

CPC分类号： F15B11/028 ,  E02F9/2232 ,  E02F9/2296 ,  F15B11/055 ,  F15B21/08 ,  F15B2211/20553 ,  F15B2211/30525 ,  F15B2211/30535 ,  F15B2211/3138 ,  F15B2211/3144 ,  F15B2211/324 ,  F15B2211/351 ,  F15B2211/40507 ,  F15B2211/41509 ,  F15B2211/6054 ,  F15B2211/6058 ,  F15B2211/6652 ,  F15B2211/7054 ,  F15B2211/71 ,  F15B2211/76

摘要： A load sensing hydraulic system is disclosed of the type in which a load signal is communicated from downstream of a main flow control orifice to a device which is operable to vary the fluid delivery rate in response to changes in the load signal. Disposed in the load signal conduit is a load signal modulating valve which, in one position, communicates the load signal, substantially unchanged, to the variable fluid source. In another position of the modulating valve, the load signal chamber of the variable fluid source is drained to tank, while in intermediate positions of the modulating valve, a portion of the load signal is communicated to the variable fluid source, and a portion is bled to tank. Modulation of a load signal permits flow control in an hydraulic system, independent of the position or movement of the main spool valve. The input to the modulating valve may be manual or electric, and if electric, may be remote, or may be automatic in response to certain predetermined system conditions.

摘要翻译： 公开了一种负载感测液压系统，其中负载信号从主流量控制孔的下游传送到可操作以响应于负载信号的变化来改变流体输送速率的装置。 在负载信号管道中设置的负载信号调节阀，其在一个位置中将基本上不变的负载信号传送到可变流体源。 在调节阀的另一位置，可变流体源的负载信号室被排放到罐中，而在调节阀的中间位置，负载信号的一部分与可变流体源连通，并且一部分流出 到坦克 负载信号的调制允许液压系统中的流量控制，与主滑阀的位置或运动无关。 调节阀的输入可以是手动的或电动的，并且如果电力可以是遥控的，或者可以是响应于某些预定的系统条件而自动的。

公开(公告)号：US4074529A

公开(公告)日：1978-02-21

申请号：US756618

申请日：1977-01-04

申请人： Tadeusz Budzich

发明人： Tadeusz Budzich

IPC分类号： F15B11/00 ,  F04B49/08 ,  F15B11/16 ,  F16H61/46 ,  F16H61/472 ,  F16H39/46

CPC分类号： F15B11/165 ,  F04B49/08 ,  F16H61/46 ,  F16H61/472 ,  F15B2211/20553 ,  F15B2211/27 ,  F15B2211/30505 ,  F15B2211/30525 ,  F15B2211/3111 ,  F15B2211/3144 ,  F15B2211/31576 ,  F15B2211/324 ,  F15B2211/327 ,  F15B2211/6051 ,  F15B2211/6309 ,  F15B2211/6313 ,  F15B2211/6336 ,  F15B2211/6346 ,  F15B2211/652 ,  F15B2211/6652 ,  F15B2211/7053 ,  F15B2211/7054 ,  F15B2211/71 ,  F16H61/433 ,  Y10S60/911

摘要： A load responsive fluid power control system using servo type flow control valves and fluid motors supplied by a variable displacement pump. The pump displacement is regulated by a control valve in response to the motor load pressure to vary the pump displacement to maintain a constant preselectable ratio between the pump outlet pressure and motor load pressure and to vary the pressure differential between pump outlet pressure and motor load pressure with variation in magnitude of the load. The pump control also limits maximum and minimum system pressures.

摘要翻译： 一种使用伺服型流量控制阀和由可变排量泵提供的流体马达的负载响应流体动力控制系统。 泵的位移由控制阀根据电机负载压力进行调节，以改变泵的位移，以保持泵出口压力和电动机负载压力之间恒定的可选择比，并改变泵出口压力和电动机负载压力之间的压力差 随着负载的大小变化。 泵控制也限制最大和最小的系统压力。

公开(公告)号：US2498543A

公开(公告)日：1950-02-21

申请号：US72444347

申请日：1947-01-25

申请人： VICKERS INC

发明人： GARDINER DUNCAN B

IPC分类号： B24B47/04 ,  F15B11/048

CPC分类号： F15B11/048 ,  B24B47/04 ,  F15B2211/30525 ,  F15B2211/3144 ,  F15B2211/325 ,  F15B2211/35 ,  F15B2211/755 ,  F15B2211/7725

公开(公告)号：US20240200581A1

公开(公告)日：2024-06-20

申请号：US18532204

申请日：2023-12-07

申请人： Taiyuan University of Technology

发明人： Long QUAN ,  Tao LIANG ,  Lianpeng XIA ,  Xiangyu WANG ,  Weinan HUANG

IPC分类号： F15B13/02 ,  F15B11/17 ,  F15B15/14 ,  F15B19/00

CPC分类号： F15B13/02 ,  F15B11/17 ,  F15B15/1457 ,  F15B19/005 ,  F15B2211/3144

摘要： The present disclosure belongs to the technical field of hydraulic control, and relates to a velocity and position compound control system for a pump-valve dual-source driven hydraulic cylinder used in engineering machinery. The system includes a first power source, a first hydraulic pump, a second power source, a second hydraulic pump, a safety valve, a proportional directional valve, a pilot operated check valve, a single-rod hydraulic cylinder, a handle, a tank, a rotating speed sensor, a first pressure sensor, a second pressure sensor, a third pressure sensor, a temperature sensor, a position transmitting unit, magnetic induction marks, a count correction module, an integrator module, a calculation control module, a signal acquisition module, a data storage module, a cloud memory, a communication protocol module, a fault diagnosis module, and a process monitoring module.

公开(公告)号：US11933331B2

公开(公告)日：2024-03-19

申请号：US17906409

申请日：2021-03-04

申请人： KAWASAKI JUKOGYO KABUSHIKI KAISHA

发明人： Tomomichi Nose ,  Hayato Kawasaki ,  Hideyasu Muraoka ,  Nobuyuki Kinoshita

IPC分类号： F15B21/08 ,  F15B11/08 ,  F15B13/043 ,  G05D7/06

CPC分类号： F15B21/08 ,  G05D7/0635 ,  F15B11/08 ,  F15B13/0433 ,  F15B2211/30525 ,  F15B2211/3144 ,  F15B2211/327 ,  F15B2211/351 ,  F15B2211/6309 ,  F15B2211/6313 ,  F15B2211/6346 ,  F15B2211/6656 ,  F15B2211/6657 ,  G05D7/0623

摘要： A control device controls movement of a valve body of a valve device and estimates a flow rate of the valve device; determines, on the basis of an input target flow rate value and the flow rate estimate, whether or not the flow of an operating fluid in the valve device is in a transient flow state; calculates an opening command on the basis of the target flow rate value and an upstream-downstream pressure difference of the valve device; and controls the movement of the valve body. When the control device determines that the flow is not in the transient flow state, it controls the movement of the valve body on the basis of the opening command, and when the control determines that the flow is in the transient flow state, it controls the movement of the valve body on the basis of the target flow rate value.

公开(公告)号：US11732488B2

公开(公告)日：2023-08-22

申请号：US17427353

申请日：2020-01-29

申请人： Putzmeister Engineering GmbH

发明人： Martin Diebold ,  Jan-Martin Veit

IPC分类号： F15B13/02 ,  E04G21/04 ,  B60S9/10

CPC分类号： E04G21/0436 ,  B60S9/10 ,  E04G21/0463 ,  F15B13/02 ,  F15B2211/3059 ,  F15B2211/3138 ,  F15B2211/3144 ,  F15B2211/7142

摘要： A vehicle having a thick matter pump has multiple supporting devices, a rotatable mast assembly with part-mast members, and a hydraulic drive assembly with hydraulic drives for the supporting devices and the mast assembly. A valve assembly is provided for the hydraulic drive assembly. The valve assembly has a group of proportional valves and a group of switching valve devices which are each connected to at least one hydraulic drive of the supporting devices or the part-mast members. The switching valve devices are connected downstream of the proportional valves. Exactly one switching valve device is supplied by exactly one proportional valve and is connected downstream of exactly one proportional valve such that outputs of the proportional valves lead exclusively to inputs of the switching valve devices.

公开(公告)号：US20180306211A1

公开(公告)日：2018-10-25

申请号：US15769351

申请日：2015-10-19

申请人： NORRHYDRO OY

发明人： Ari SIPOLA ,  Mika SAHLMAN

IPC分类号： F15B11/00 ,  F15B11/036 ,  F15B1/027

CPC分类号： F15B11/006 ,  F15B1/027 ,  F15B11/036 ,  F15B11/0426 ,  F15B2211/20569 ,  F15B2211/20592 ,  F15B2211/212 ,  F15B2211/30575 ,  F15B2211/3144 ,  F15B2211/327 ,  F15B2211/40592 ,  F15B2211/7055 ,  F15B2211/76

摘要： A hydraulic system and a method comprising a linear actuator 23 for generating discrete sum forces, chambers A-D for generating discrete force components, at least two charging circuits 3,4 configured to maintain predetermined pressure levels of hydraulic fluid, independent control interfaces 9-16 configured to open and close connections of the first and second charging circuits to the chambers, and an electronic control unit 50 for controlling the control interfaces. At least two control interfaces are proportional valves which are used as shut-off valves and are independently switchable to the open and closed positions in a controlled manner. Moreover, non-throttled control and secondary control are implemented in the hydraulic system and the method.

公开(公告)号：US20170253468A1

公开(公告)日：2017-09-07

申请号：US15448516

申请日：2017-03-02

申请人： Liebherr-Werk Ehingen GmbH

发明人： Joerg GEBELE

IPC分类号： B66C23/86 ,  F15B13/02 ,  F15B11/044 ,  F15B11/10

CPC分类号： B66C23/86 ,  F15B11/044 ,  F15B11/10 ,  F15B13/024 ,  F15B13/027 ,  F15B2211/30 ,  F15B2211/30505 ,  F15B2211/3053 ,  F15B2211/3144 ,  F15B2211/351 ,  F15B2211/40561 ,  F15B2211/41554 ,  F15B2211/455 ,  F15B2211/46 ,  F15B2211/50572 ,  F15B2211/5156 ,  F15B2211/5157 ,  F15B2211/55 ,  F15B2211/5753 ,  F15B2211/6658 ,  F15B2211/7058 ,  F15B2211/715

摘要： The present disclosure relates to a hydraulic control circuit for crane slewing gear having directional valves arranged in work lines and controllable separately for the inflow and outflow to the hydraulic motor for the carrying out of a rotational movement of the slewing gear, wherein an inflow valve serves the control of the oil inflow from a hydraulic pump via the work line to the hydraulic motor and an outflow valve is provided via which the hydraulic motor can be relieved to the tank, wherein the work lines are each connected via at least one check valve to a common inlet of the outflow valve to relieve the hydraulic motor independently of the direction of rotation of the slewing gear via an outflow valve into the tank.

公开(公告)号：US20170175779A1

公开(公告)日：2017-06-22

申请号：US15387569

申请日：2016-12-21

申请人： Kubota Corporation

发明人： Yuji FUKUDA ,  Kazuyoshi ARII ,  Ryohei SUMIYOSHI ,  Keigo HONDA

IPC分类号： F15B11/16 ,  E02F9/22

CPC分类号： F15B11/16 ,  E02F3/3414 ,  E02F9/2292 ,  F15B2211/3059 ,  F15B2211/3116 ,  F15B2211/3122 ,  F15B2211/3127 ,  F15B2211/3144 ,  F15B2211/40507 ,  F15B2211/40592 ,  F15B2211/41509 ,  F15B2211/71 ,  F15B2211/7142

摘要： A hydraulic system of a work machine includes a first hydraulic actuator, a first control valve, a first oil passage, a second hydraulic actuator, a second control valve, a second oil passage, and a bypass oil passage. The first control valve is connected to the first hydraulic actuator to control the first hydraulic actuator. The first oil passage is connected to the first control valve to supply hydraulic oil to the first control valve. The second control valve connected to the second hydraulic actuator to control the second hydraulic actuator. The second oil passage connects the second control valve and the first hydraulic actuator via the first control valve. Hydraulic oil returning from the first hydraulic actuator to the first control valve is to be supplied to the second control valve through the second oil passage. The bypass oil passage connects the first oil passage and the second oil passage.

公开(公告)号：US20150298730A1

公开(公告)日：2015-10-22

申请号：US14443389

申请日：2012-11-20

申请人： Roland Wiktor ,  Kim Heybroek

发明人： Roland Wiktor ,  Kim Heybroek

IPC分类号： B62D5/20 ,  F15B15/20 ,  E02F9/22 ,  F15B15/14

CPC分类号： B62D5/20 ,  B62D12/00 ,  E02F3/431 ,  E02F9/0841 ,  E02F9/2221 ,  E02F9/2228 ,  E02F9/225 ,  F15B11/006 ,  F15B11/036 ,  F15B15/1423 ,  F15B15/20 ,  F15B2211/30575 ,  F15B2211/3144 ,  F15B2211/365 ,  F15B2211/7055

摘要： A pressurized medium assembly includes a first working chamber and a second working chamber. The first and second working chambers are adapted to together produce a load. The pressurized medium assembly includes a first control arrangement adapted to provide a fluid communication between the first working chamber and a pressure line in an on/off manner. The pressurized medium assembly further includes a second control arrangement adapted to provide a fluid communication between the second working chamber and a pressure line. The second control arrangement is adapted to proportionally regulate the pressure in the second working chamber.

摘要翻译： 加压介质组件包括第一工作室和第二工作室。 第一和第二工作室适于一起产生负载。 加压介质组件包括适于以开/关方式在第一工作室和压力管线之间提供流体连通的第一控制装置。 加压介质组件还包括适于在第二工作室和压力管线之间提供流体连通的第二控制装置。 第二控制装置适于成比例地调节第二工作室中的压力。