公开(公告)号：US20190195732A1

公开(公告)日：2019-06-27

申请号：US16223192

申请日：2018-12-18

申请人： SINTOKOGIO, LTD.

发明人： Masahiko NAGASAKA ,  Hiroyasu MAKINO ,  Katsuaki ODAGI ,  Tomoyuki YOKOMAE

IPC分类号： G01M13/00 ,  G01L5/00

CPC分类号： G01M13/00 ,  F15B15/20 ,  F15B19/005 ,  F15B2211/6303 ,  F15B2211/6336 ,  F15B2211/864 ,  F15B2211/87 ,  F16H21/40 ,  F16H25/20 ,  G01L5/0033 ,  G01L5/0038

摘要： A wear detection method and system for a linear actuator such as a pneumatic cylinder, a hydraulic cylinder, an electric cylinder or the like. A physical amount detection sensor 9 is mounted on a linear actuator in which a push-pull member connected to a rod 2 pushes and pulls a pressure-receiving object while applying a lateral load in a direction different from the linear movement direction. An external force that is generated between a tube and the mounting member when the pressure-receiving object is pushed and pulled is detected by the physical amount detection sensor 9 and compared with standard external force data, which was detected in a state without abnormalities and stored in a computation/storage/determination processing device 10, to computationally determine whether the linear actuator is in a normal state or an abnormal state.

公开(公告)号：US20190145438A1

公开(公告)日：2019-05-16

申请号：US15812298

申请日：2017-11-14

申请人： Deere & Company

发明人： Amy K. Jones ,  Richard Pugh ,  Kristen D. Cadman

IPC分类号： F15B19/00 ,  F15B1/26 ,  F15B21/04 ,  E02F3/42 ,  E02F3/43 ,  E02F9/22

CPC分类号： F15B19/005 ,  E02F3/283 ,  E02F3/422 ,  E02F3/431 ,  E02F9/2235 ,  E02F9/2296 ,  F15B1/26 ,  F15B21/041 ,  F15B2211/20546 ,  F15B2211/615 ,  F15B2211/6303 ,  F15B2211/6306 ,  F15B2211/655 ,  F15B2211/6652 ,  F15B2211/6658 ,  F15B2211/857 ,  F15B2211/8636 ,  F15B2211/87

摘要： A vehicle comprising a hydraulic fluid reservoir, a hydraulic fluid pump, a hydraulic filter, a sensor, and a vehicle control unit. The hydraulic fluid reservoir may have a bottom portion filled with hydraulic fluid and a top portion filled with air. The hydraulic fluid pump may be hydraulically coupled to the hydraulic fluid reservoir so as to draw hydraulic fluid from the hydraulic fluid reservoir. The hydraulic filter may be hydraulically coupled to the hydraulic fluid reservoir so as to filter debris from the hydraulic fluid entering the hydraulic fluid reservoir. The sensor may be in communication with the vehicle control unit where the sensor is configured to measure a variable indicative of a failure status of the hydraulic filter and communicate the variable to the vehicle control unit. The vehicle control unit may be configured to derate the hydraulic fluid pump to a first degree when the variable indicative of the failure status of the hydraulic filter is above a first threshold and configured to derate the hydraulic fluid pump to a second degree when the variable indicative of the failure status of the hydraulic filter is above a second threshold.

公开(公告)号：US20180128292A1

公开(公告)日：2018-05-10

申请号：US15808373

申请日：2017-11-09

申请人： Eaton Corporation

发明人： Meng Wang ,  Michael Berne Rannow

IPC分类号： F15B21/02 ,  F15B11/00 ,  F15B21/08

CPC分类号： F15B19/002 ,  F15B11/006 ,  F15B13/0417 ,  F15B19/00 ,  F15B19/005 ,  F15B19/007 ,  F15B21/087 ,  F15B2013/0409 ,  F15B2211/20546 ,  F15B2211/30575 ,  F15B2211/455 ,  F15B2211/46 ,  F15B2211/6313 ,  F15B2211/634 ,  F15B2211/6346 ,  F15B2211/6656 ,  F15B2211/7053 ,  F15B2211/7058 ,  F15B2211/761 ,  F15B2211/855 ,  F15B2211/857 ,  F15B2211/87 ,  G01F1/36 ,  G01F15/005

摘要： Systems and methods for controlling valve assemblies associated with an actuator in an electro-hydraulic system are disclosed. In one method, a controller monitors hydraulic fluid flow for an actuator to identify one valve assembly connected to the actuator as a meter-in valve and another valve assembly connected to the actuator as a meter-out valve. In one aspect, the valve assembly most recently identified as the meter-in valve is controlled to maintain a pressure setpoint and the valve assembly most recently identified as the meter-out valve is controlled to maintain a hydraulic fluid flow rate. The method can also include determining whether the actuator is in a passive state or an overrunning state and controlling the valve most recently identified as the meter-in valve to maintain a first pressure setpoint when the actuator is in a passive state and to maintain a second pressure setpoint when the actuator is in an overrunning state.

公开(公告)号：US20180120193A1

公开(公告)日：2018-05-03

申请号：US15566263

申请日：2016-04-19

申请人： Nexmatix LLC

发明人： Dennis T. Mell ,  Ellen R. Mell ,  Michael Goldfarb

IPC分类号： G01M3/26 ,  F16K37/00

CPC分类号： G01M3/26 ,  F15B13/021 ,  F15B19/005 ,  F15B20/005 ,  F15B2013/0412 ,  F15B2211/6313 ,  F15B2211/855 ,  F15B2211/857 ,  F15B2211/8636 ,  F15B2211/87 ,  F15B2211/8855 ,  F16K11/0712 ,  F16K31/122 ,  F16K31/1221 ,  F16K37/005 ,  G01M3/3272

摘要： This application describes apparatuses, systems, and methods that combines specific configurations of a pneumatic actuation system together with a pressure measurement device to allow for measurement of pressure inside isolated subsystems within the system to thereby provide detection of leaks within the system. In certain exemplary embodiments, the apparatus comprises a directional control valve that employs at least one port connectivity configuration that creates at least one isolated fluid subsystem within the overall system. When the valve is in this isolated subsystem configuration, a given mass of fluid (i.e., compressed gas) can neither enter nor leave the subsystem. The leak detection method consists of momentarily placing the valve in this isolated subsystem configuration when switching between standard configurations, and measuring pressure with at least one pressure sensor in the isolated fluid subsystem while in this configuration, where loss of pressure in this configuration indicates existence of a leak.

公开(公告)号：US20180094746A1

公开(公告)日：2018-04-05

申请号：US15532462

申请日：2016-03-03

申请人： Emerson Process Management, Valve Automation, Inc.

发明人： Toni Zhang ,  Edwin Schreuder ,  Harry Hobert ,  Eric Yuan

IPC分类号： F16K31/42 ,  F16K37/00 ,  F15B19/00 ,  F15B5/00

CPC分类号： F16K31/42 ,  F15B5/006 ,  F15B15/065 ,  F15B15/2861 ,  F15B19/005 ,  F15B20/002 ,  F15B2211/6336 ,  F15B2211/862 ,  F15B2211/863 ,  F15B2211/87 ,  F15B2211/8855 ,  F16K31/084 ,  F16K31/1635 ,  F16K37/0025 ,  F16K37/0041

摘要： Methods and apparatus are disclosed for automatically detecting the failure configuration of a pneumatic actuator. A control module is operatively coupled to the actuator, and the actuator is operatively coupled to a valve having a flow control member. When a number of pilot valves included in the control module is indicative of a double-acting actuator, the failure configuration of the actuator is determined based on the number of pilot valves. When the number of pilot valves included in the control module is indicative of a single-acting actuator, the failure configuration of the actuator is determined by comparing a first measurement value obtained in response to moving the flow control member in a first direction to a first position and a second measurement value obtained in response to moving the flow control member in a second direction opposite the first direction to a second position.

公开(公告)号：US20180066416A1

公开(公告)日：2018-03-08

申请号：US15554118

申请日：2016-06-01

申请人： Hitachi Construction Machinery Co., Ltd.

发明人： Seiji HIJIKATA ,  Kouji ISHIKAWA ,  Shinya IMURA

IPC分类号： E02F9/22 ,  F15B21/14 ,  F15B20/00

CPC分类号： E02F9/2203 ,  E02F9/2217 ,  E02F9/2285 ,  E02F9/2292 ,  E02F9/2296 ,  E02F9/268 ,  F15B19/005 ,  F15B20/002 ,  F15B20/004 ,  F15B20/007 ,  F15B21/14 ,  F15B2211/20546 ,  F15B2211/20576 ,  F15B2211/3058 ,  F15B2211/30595 ,  F15B2211/6309 ,  F15B2211/6313 ,  F15B2211/6316 ,  F15B2211/6652 ,  F15B2211/7053 ,  F15B2211/7142 ,  F15B2211/761 ,  F15B2211/862 ,  F15B2211/8636 ,  F15B2211/87 ,  F15B2211/8752 ,  F15B2211/88

摘要： A hydraulic drive system 100A for a work machine includes: a boom cylinder 4; an arm cylinder 8; a hydraulic pump device 51; a control valve 5; a regenerative device 61; a first operation device 41; a second operation device 42; a sensor device 71; and a controller 27. The sensor device 71 includes at least one of pressure sensors 23, 24, 25, and 26. The controller 27 includes an abnormality detection part 142 and a first control part. The abnormality detection part 142 determines whether or not the sensor device 71 is abnormal. If the sensor device 71 is abnormal, the first control part controls the regenerative device 61 such that the hydraulic fluid returning from the boom cylinder 4 is not supplied to the arm cylinder 8 even if the values measured by the sensor device 71 satisfy regenerative conditions.

公开(公告)号：US20170276258A1

公开(公告)日：2017-09-28

申请号：US15466131

申请日：2017-03-22

申请人： Azbil Corporation

发明人： Takashi NOMIYAMA

IPC分类号： F16K37/00

CPC分类号： F16K37/0083 ,  F15B5/006 ,  F15B9/07 ,  F15B19/005 ,  F15B2211/6309 ,  F15B2211/6313 ,  F15B2211/6657 ,  F15B2211/87 ,  F16K37/0091

摘要： A positioner according to the present invention includes: an electro-pneumatic converter that converts an input electric signal into a pneumatic signal and controls the valve opening of a regulating valve by driving an operational unit in accordance with the pneumatic signal; an operating-point searching unit that changes the electric signal by performing open loop control to search for an operating point indicating a target valve-opening value of the regulating valve when an output air pressure of the pneumatic signal starts to change; and a PST executing unit that executes a PST on the regulating valve by using the operating point found by the operating-point searching unit. The operating-point searching unit sets the operating point based on a value of the electric signal when the output air pressure matches a first reference value.

公开(公告)号：US09534617B2

公开(公告)日：2017-01-03

申请号：US14112168

申请日：2012-04-11

申请人： Andre-Heinrich Meinhof

发明人： Andre-Heinrich Meinhof

IPC分类号： F15B20/00 ,  F15B19/00

CPC分类号： F15B20/005 ,  F15B19/005 ,  F15B2211/30575 ,  F15B2211/6306 ,  F15B2211/87 ,  F15B2211/8752 ,  F15B2211/8855

摘要： The invention relates to an electropneumatic position controller having a controllable valve group (9, 10, 13) arranged in the position controller and having at least one valve (9, 10), by means of which in normal operation either compressed air supplied by means of a compressed air supply line (6) can be fed to an exhaust connection (8) or air fed by means of the exhaust connection (8) can be discharged to the outside, depending on the actuation of the valve group. In order for the valve group to be brought in a safe position, even in the event of a leak in one of the components thereof, said group is arranged in a gas-tight housing (14) within the position controller and means (15) are provided for monitoring the pressure in the housing (14) and for actuating the valve group (9, 10, 13) such that if the pressure in the housing (14) exceeds a predefined threshold value, said group is brought in the predefined safe position.

摘要翻译： 本发明涉及一种电动气动位置控制器，其具有布置在所述位置控制器中的可控制的阀组（9,10,13），并且具有至少一个阀（9,10），通过所述阀（9,10）在正常操作中由装置 可以将压缩空气供给管线（6）输送到排气连接件（8），或者通过排气连接件（8）进行空气供给可以根据阀组的致动被排出到外部。 为了将阀组置于安全位置，即使在其一个部件中发生泄漏的情况下，所述组布置在位置控制器和装置（15）内的气密性壳体（14）中， 被设置用于监视壳体（14）中的压力并且用于致动阀组（9,10,13），使得如果壳体（14）中的压力超过预定义的阈值，则将该组带入预定义的安全 位置。

公开(公告)号：US09488990B2

公开(公告)日：2016-11-08

申请号：US14394371

申请日：2013-04-26

申请人： SMC KABUSHIKI KAISHA

发明人： Fumio Morikawa ,  Naoki Sakamura

IPC分类号： F16K11/10 ,  G05D16/20 ,  F15B13/08 ,  F15B20/00

CPC分类号： G05D16/2026 ,  F15B13/0817 ,  F15B13/085 ,  F15B13/086 ,  F15B13/0867 ,  F15B20/008 ,  F15B2211/7142 ,  F15B2211/8636 ,  F15B2211/87 ,  F15B2211/8752 ,  Y10T137/87772

摘要： In a solenoid valve system, a plurality of first through third solenoid valve units are divided into a plurality of first through third groups. In this case, a safety power source control unit is provided for controlling the first through third solenoid valve units with respect to each of the first through third groups.

摘要翻译： 在电磁阀系统中，多个第一至第三电磁阀单元被分成多个第一至第三组。 在这种情况下，设置安全电源控制单元，用于相对于第一至第三组中的每一个控制第一至第三电磁阀单元。

公开(公告)号：US09394928B2

公开(公告)日：2016-07-19

申请号：US13832085

申请日：2013-03-15

申请人： Caterpillar Inc.

发明人： Matthew J. Beschorner ,  Aleksandar M. Egelja ,  Eric Hughes ,  Mikhail Sorokine

IPC分类号： F17D1/00 ,  F15B19/00 ,  F16K37/00 ,  F15B20/00 ,  F16K31/12 ,  F16K11/07

CPC分类号： F15B19/005 ,  F15B20/008 ,  F15B2211/30575 ,  F15B2211/329 ,  F15B2211/36 ,  F15B2211/6316 ,  F15B2211/8636 ,  F15B2211/87 ,  F16K11/0712 ,  F16K31/12 ,  F16K37/0041 ,  F16K37/005 ,  Y10T137/0318 ,  Y10T137/7768 ,  Y10T137/8326

摘要： A system can include one or more valve arrangements with a working chamber to receive a working fluid at a first pressure, and a control chamber to receive fluid at a second pressure. A dynamic seal can be disposed on a land of a valve element. A supply passage can be in communication between the control chamber and a tank and can include a check valve. A relief valve can be disposed between the check valve and the control chamber. A pilot pump and another relief valve may be disposed upstream of the check valve. The relief valve downstream of the check valve can have a higher pressure limit than the downstream one. A pressure sensor may be disposed between the check valve and the control chamber and used to warn the operator of a high pressure in the control chamber.

摘要翻译： 系统可以包括具有工作室的一个或多个阀装置，以在第一压力下接收工作流体，以及控制室，以在第二压力下接收流体。 可以在阀元件的台面上设置动态密封件。 供应通道可以在控制室和罐之间连通，并且可以包括止回阀。 安全阀可以设置在止回阀和控制室之间。 先导泵和另一安全阀可以设置在止回阀的上游。 止回阀下游的安全阀可以具有比下游更高的压力极限。 压力传感器可以设置在止回阀和控制室之间，并且用于警告操作者控制室中的高压。