公开(公告)号：US20190219177A1

公开(公告)日：2019-07-18

申请号：US16336969

申请日：2017-08-31

申请人： HYDAC SYSTEMS & SERVICES GMBH

发明人： Sascha Alexander BIWERSI

IPC分类号： F16K11/07 ,  F15B13/04 ,  F15B11/10

CPC分类号： F16K11/07 ,  F15B11/10 ,  F15B13/0402 ,  F15B13/0407 ,  F15B13/0417 ,  F15B2211/253 ,  F15B2211/30535 ,  F15B2211/329 ,  F15B2211/428 ,  F15B2211/7058 ,  F15B2211/8613

摘要： 1. Valve and valve device comprising a valve of that type. 2. The invention relates to a valve comprising a valve housing (33), which has at least one service connection (A, B), a pressure supply connection (P) and a return connection (T) and in which valve housing (33) a control slide (STS) is guided so as to be movable longitudinally in order to control these individual connections. The valve is characterised in that the supply pressure, which is applied to the pressure connection (P) in order to control a consumer (10, 12) connected to the service connection (A; B), is guided across at least one control side (56) of the control slide (STS) via an orifice plate (54) and a control channel (50), the control side (56) being positioned in a control chamber (58) in the valve housing (33) such that it can move and the control chamber (58) being connected to the return connection (T) via an additional orifice plate (59).

公开(公告)号：US20180153101A1

公开(公告)日：2018-06-07

申请号：US15837670

申请日：2017-12-11

申请人： MacDon Industries Ltd.

发明人： James Thomas Dunn ,  Graham Michael Leverick ,  Russell George Lyons ,  Bruce Robert Shearer ,  Kyle Edward Boch

IPC分类号： A01D41/14 ,  A01B63/00 ,  A01B63/108 ,  A01D41/127

CPC分类号： A01D41/141 ,  A01B63/008 ,  A01B63/108 ,  A01D41/1243 ,  A01D41/127 ,  F15B1/024 ,  F15B11/08 ,  F15B11/10 ,  F15B13/044 ,  F15B21/14 ,  F15B2211/20546 ,  F15B2211/30565 ,  F15B2211/3059 ,  F15B2211/5151 ,  F15B2211/526 ,  F15B2211/625 ,  F15B2211/6309 ,  F15B2211/6313 ,  F15B2211/6336 ,  F15B2211/6653 ,  F15B2211/7051 ,  F15B2211/7128 ,  F15B2211/761

摘要： A header is supported by a pair of hydraulic float cylinders, where a float pressure to the cylinders is directly controlled by an electronic control supplying a variable control signal to a PPRR valve arrangement to maintain the float pressure at a predetermined value. At the set pressure a predetermined lifting force is provided to the header. A position sensor is used to generate an indication of movement and/or acceleration and/or velocity. The electronic control is arranged, in response to changes in the sensor signal, to temporarily change the control signal to vary the lifting force and thus change the dynamic response of the hydraulic float cylinder. A lift force greater than that required to lift the header can be provided by a lift cylinder and can be opposed in a controlled manner to apply a controlled downforce by the back of the same cylinder or by a separate component.

公开(公告)号：US09829013B2

公开(公告)日：2017-11-28

申请号：US14776367

申请日：2014-03-13

申请人： DOOSAN INFRACORE CO., LTD.

发明人： Yong Lak Cho ,  Dal Sik Jang ,  Woo Yong Jung ,  Min Ha An ,  A Reum Seo ,  Sang Woo Lee ,  Yoon Seok Jang

IPC分类号： F15B1/02 ,  F15B1/027 ,  E02F9/22 ,  F15B11/17 ,  F15B1/04 ,  F15B11/10 ,  F15B13/02 ,  F15B13/04

CPC分类号： F15B1/027 ,  E02F9/2217 ,  E02F9/2267 ,  E02F9/2289 ,  E02F9/2292 ,  E02F9/2296 ,  F15B1/04 ,  F15B11/10 ,  F15B11/17 ,  F15B13/027 ,  F15B13/04 ,  F15B2201/4155 ,  F15B2201/51 ,  F15B2211/20561 ,  F15B2211/20576 ,  F15B2211/212 ,  F15B2211/27 ,  F15B2211/40 ,  F15B2211/7053 ,  F15B2211/785

摘要： The present disclosure relates to a hydraulic system for a construction machine, and more particularly, to a hydraulic system for a construction machine including a plurality of actuators, in which each of the actuators includes a pump/motor, is operated under a control of a corresponding pump/motor, and stores working oil in an accumulator or receives the working oil supplemented from the accumulator in accordance with a difference between a flow rate entering the actuator and a flow rate discharged from the actuator.

公开(公告)号：US20170300071A1

公开(公告)日：2017-10-19

申请号：US15516562

申请日：2015-09-29

申请人： WELL EQUIPMENTS INTERNATIONAL S.R.L.

发明人： Luigi PEVERI

IPC分类号： G05D16/10

CPC分类号： G05D16/106 ,  F15B5/00 ,  F15B11/10 ,  F15B17/00

摘要： A pressure compensator, particularly for oleodynamic applications, comprising two cylinders: a compensator cylinder in which is slidingly engaged a first piston comprising a first piston rod, and a reducing cylinder, in which is slidingly engaged a second piston comprising a second piston rod axially connected to the first piston rod; said compensator cylinder being coupled to a main oleodynamic cylinder; said compensator cylinder having a size so designed as to provide the same area ratio as that of the main cylinder, thereby to a set position of said main cylinder piston corresponding a precise position of the first piston of the compensator cylinder; said reducing cylinder comprising at least a low-pressure chamber coupled to a pressure gauge; a displacement of the reducing cylinder piston rod either increases or decreases a pressure in said low-pressure chamber, proportionately to a working pressure in the main cylinder.

公开(公告)号：US20170284425A1

公开(公告)日：2017-10-05

申请号：US15391740

申请日：2016-12-27

申请人： KUBOTA CORPORATION

发明人： Yoshimitsu TANAKA ,  Kunihiko BITO ,  Tsukasa HARAGUCHI ,  Toshiaki OTANI ,  Yuji KAWANO ,  Masaru KUMATANI ,  Junki MAEDA ,  Shoichi KAWANO ,  Hitoshi IWAMURA ,  Teruo KUNIZAWA ,  Takehiro WAKASUGI

IPC分类号： F15B11/16 ,  E02F9/22 ,  F15B21/04 ,  E02F3/42 ,  F15B11/10 ,  F15B1/26

CPC分类号： F15B11/168 ,  E02F3/422 ,  E02F9/2221 ,  E02F9/2239 ,  E02F9/2246 ,  E02F9/2285 ,  E02F9/2289 ,  E02F9/2292 ,  E02F9/2296 ,  F15B1/26 ,  F15B11/10 ,  F15B21/044 ,  F15B2211/35 ,  F15B2211/55 ,  F15B2211/7052 ,  F15B2211/7058 ,  F15B2211/71 ,  F15B2211/78

摘要： A hydraulic system for a work machine includes a first switch valve and a first return circuit. The first switch valve is switchable between a confluent position and an isolation position. The first switch valve is switched to the confluent position such that a first operation fluid tube is connected to a second operation fluid tube and a first transmission fluid tube is connected to a second transmission fluid tube. The first switch valve is switched to the isolation position such that the first operation fluid tube is disconnected from the second operation fluid tube and the first operation fluid tube is disconnected from the second operation fluid tube.

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：US20170241454A1

公开(公告)日：2017-08-24

申请号：US15439157

申请日：2017-02-22

申请人： Liebherr-Mining Equipment Colmar SAS

发明人： Philipp Hahn ,  Volker Gliniorz ,  Guillaume Bonnetot

IPC分类号： F15B21/14 ,  F15B11/10 ,  F15B1/027

CPC分类号： F15B21/14 ,  E02F9/2217 ,  F15B1/024 ,  F15B1/027 ,  F15B11/10 ,  F15B2201/31 ,  F15B2201/3151 ,  F15B2201/3152 ,  F15B2211/20507 ,  F15B2211/212 ,  F15B2211/3058 ,  F15B2211/7053

摘要： This invention relates to a device for the recuperation of hydraulic energy in a working machine with at least one differential cylinder and to a corresponding working machine.

公开(公告)号：US20170241447A1

公开(公告)日：2017-08-24

申请号：US15426933

申请日：2017-02-07

申请人： AGCO International GmbH

发明人： Nicolas Boulard

IPC分类号： F15B11/10 ,  A01B76/00

CPC分类号： F15B11/10 ,  A01B63/10 ,  A01B76/00 ,  E02F9/2228 ,  F15B2211/327 ,  F15B2211/40515 ,  F15B2211/426 ,  F15B2211/605 ,  F15B2211/6309 ,  F15B2211/6313 ,  F15B2211/632 ,  F15B2211/6346 ,  F15B2211/6654 ,  G05D7/0635

摘要： An agricultural system for hydraulic flow control having an adjustable hydraulic fluid valve arranged between a hydraulic reservoir and a hydraulic consumer, pressure is measured at the reservoir-facing side and at the consumer-facing side of the valve, from which the fluid flow through the valve can be determined. The valve can then be easily controlled to provide a desired fluid flow level, regardless of the type of hydraulic circuit used.

公开(公告)号：US20170122345A1

公开(公告)日：2017-05-04

申请号：US14927004

申请日：2015-10-29

申请人： United Technologies Corporation

发明人： Joshua Adams ,  Martin Amari ,  Timothy J. Crowley

IPC分类号： F15B15/08 ,  F15B15/28 ,  F15B11/10 ,  F15B15/14

CPC分类号： F15B15/088 ,  F01D17/26 ,  F05D2260/406 ,  F05D2270/301 ,  F05D2270/64 ,  F15B11/028 ,  F15B11/08 ,  F15B11/10 ,  F15B15/1447 ,  F15B15/28 ,  F15B2211/30575 ,  F15B2211/50536 ,  F15B2211/526 ,  F15B2211/6313 ,  F15B2211/6336 ,  F15B2211/665 ,  F15B2211/6653 ,  F15B2211/7053 ,  F15B2211/765

摘要： Systems and methods for use with a variable pressure actuator control system for a gas turbine engine are provided. A variable pressure actuator control system for a gas turbine engine may comprise a controller, a pressure regulating electro-hydraulic servo valve assembly (P-EHSV), including a variable restriction flow path, in electronic communication with the controller, a position regulating electro-hydraulic servo valve assembly (X-EHSV), including a network of flow paths, in electronic communication with the controller, a bypass regulator (BPR) in fluid communication with at least one of a pump, the P-EHSV, or the X-EHSV, the BPR configured to be controlled by the P-EHSV via a bypass pressure to vary an available pressure, and an actuator comprising an actuator piston. The variable pressure actuator control system may minimize pressure when possible to increase mission capability for a gas turbine engine.

公开(公告)号：US20170096908A1

公开(公告)日：2017-04-06

申请号：US15272871

申请日：2016-09-22

申请人： Elliott Company

发明人： William G. Pacelli ,  James F. Walsh

IPC分类号： F01D17/14 ,  F16K31/40 ,  F16K31/122 ,  F01D25/24 ,  F16K1/12

CPC分类号： F01D17/145 ,  F01D25/24 ,  F05D2220/31 ,  F05D2260/57 ,  F05D2260/83 ,  F15B11/10 ,  F15B19/005 ,  F15B20/008 ,  F15B2211/6336 ,  F15B2211/87 ,  F15B2211/8755 ,  F15B2211/8855 ,  F16K1/126 ,  F16K31/1221 ,  F16K31/406 ,  F16K37/0083

摘要： A pneumatic trip system for a turbine includes a valve member; a valve stem connected to the valve member; and an actuator assembly connected to the valve stem. The actuator assembly includes a cylinder; a piston connected to the valve stem, the piston dividing the cylinder into a first chamber and a second chamber; a biasing element disposed in the second chamber of the cylinder; and a pneumatic circuit in communication with the second chamber of the cylinder. The pneumatic circuit is configured to pressurize the second chamber of the cylinder to actuate the piston to move the valve stem and the valve member to an exercised position between the open position and the closed position while the first chamber is pressurized.