公开(公告)号：US12123434B2

公开(公告)日：2024-10-22

申请号：US17602291

申请日：2019-04-08

申请人： Volvo Construction Equipment AB ,  Norrhydro Oy

发明人： Mika Sahlman ,  Jussi Mäkitalo ,  Ari Lappalainen ,  Peter Stambro

IPC分类号： F15B11/04 ,  F15B1/02

CPC分类号： F15B11/04 ,  F15B1/024 ,  F15B2201/51 ,  F15B2201/515 ,  F15B2211/20546 ,  F15B2211/212 ,  F15B2211/625 ,  F15B2211/6309 ,  F15B2211/6346 ,  F15B2211/6654 ,  F15B2211/6656 ,  F15B2211/75 ,  F15B2211/763

摘要： A hydraulic system includes: a high-pressure line; a pump configured to supply pressurized hydraulic fluid to the high-pressure line; a variable displacement hydraulic machine connected by a fluid connection to the high-pressure line for rotationally driving the rotatable load; an electronic control unit; an energy storing device connected to the high-pressure line and configured to communicate with the high-pressure line by receiving energy from the high-pressure line and/or supplying energy to the high-pressure line; and a first detector configured to detect the amount of energy stored in the energy storing device and to transmit a signal indicating said amount of energy stored to the electronic control unit. The electronic control unit is configured to control the volume flow intake of the variable displacement hydraulic machine dependent on a target output of the variable displacement hydraulic machine and on the detected amount of energy stored in the energy storing device.

公开(公告)号：US11867204B2

公开(公告)日：2024-01-09

申请号：US18169202

申请日：2023-02-14

申请人： Michael Yuan

发明人： Michael Yuan

IPC分类号： F15B13/043 ,  F16K31/00 ,  F16K11/07 ,  F16K31/42 ,  G05D16/20 ,  F15B13/04 ,  B64C23/00 ,  F02C9/26

CPC分类号： F15B13/0438 ,  B64C23/005 ,  F02C9/26 ,  F16K11/0712 ,  F16K31/005 ,  F16K31/42 ,  F15B2013/0409 ,  F15B2211/6656 ,  G05D16/2093 ,  Y10T137/86598 ,  Y10T137/86606 ,  Y10T137/86614

摘要： A piezoelectric ring bender servo valve assembly reduces mechanical wear by removing mechanical components used in prior art servo valves. The assembly does not use torque motor, flapper, and feedback spring. In this manner, no moving parts are required, which reduces maintenance and costs. A pair of piezoelectric ring benders mount adjacently to a pair of nozzles. The piezoelectric ring benders independently regulate the flow of fluid through the nozzles by moving between an open position to enable flowage, and a closed position to restrict flowage. A linear position sensing device measures and provides feedback about the spool position to a valve controller. The valve controller allows the spool valve to move until valve position achieves command position and the force on the spool valve is in equilibrium with pressure difference across spool valve. An H-bridge operable to switch the polarity of a differential pressure applied across to a load.

公开(公告)号：US11719360B2

公开(公告)日：2023-08-08

申请号：US17718304

申请日：2022-04-11

申请人： FISHER CONTROLS INTERNATIONAL LLC

发明人： Kenneth W. Junk

IPC分类号： F16K37/00 ,  F15B15/06 ,  F15B19/00 ,  F16K31/163 ,  F15B20/00 ,  F16K31/122 ,  F15B21/08

CPC分类号： F16K37/0083 ,  F15B15/066 ,  F15B19/005 ,  F15B20/00 ,  F15B21/087 ,  F16K31/1221 ,  F16K31/1635 ,  F15B2211/6313 ,  F15B2211/6336 ,  F15B2211/6656 ,  F15B2211/7052 ,  F15B2211/755 ,  F15B2211/8752 ,  F15B2211/8755

摘要： To generate a setpoint signal to stroke a valve during a partial-stroke test, a first target is determined for the setpoint signal based at least on a travel displacement threshold, the travel displacement threshold corresponding to a desired extent of travel of the valve during the partial-stroke test; the setpoint signal is ramped from an initial value to the first target, during a first time interval; subsequently to the first time interval, the setpoint signal is maintained at the first target during a second time interval; a second target is determined for the setpoint signal based at least on the initial value; and during a third time interval subsequent to the second interval, the setpoint signal is ramped from the first target to the second target in a direction opposite to the ramping of the setpoint signal during the first time interval.

公开(公告)号：US20190120263A1

公开(公告)日：2019-04-25

申请号：US15793315

申请日：2017-10-25

申请人： Dresser LLC

发明人： Jonathan Fredric Cohen ,  Jagdish Gattu ,  Lei Lu ,  Anatoly Podpaly ,  Harold Randall Smart ,  Paul Talmage Tirrell

IPC分类号： F15B15/20 ,  F16K31/04 ,  F16K15/14 ,  F16K47/04 ,  G01D11/24 ,  G05D7/00 ,  F15B13/08

CPC分类号： F15B15/202 ,  F15B5/006 ,  F15B13/0882 ,  F15B20/00 ,  F15B21/085 ,  F15B2211/6336 ,  F15B2211/6346 ,  F15B2211/6656 ,  F15B2211/8616 ,  F15B2211/8855 ,  F16K15/148 ,  F16K31/046 ,  F16K47/04 ,  G01D11/24 ,  G05B2219/45006 ,  G05D7/005

摘要： A controller for a valve assembly that is configured to meet requirements for use in hazardous areas. These configurations may regulate flow of instrument air to a pneumatic actuator to operate a valve. The controller may comprise enclosures, including a first enclosure and a second enclosure, each having a peripheral wall forming an interior space, and circuitry comprising a barrier circuit disposed in the interior space of one of the enclosures that power limits digital signals that exits that enclosure. In one example, the peripheral wall of enclosures are configured to allow instrument air into the interior space of the first enclosure but to prevent instrument air from the interior space of the second enclosure.

公开(公告)号：US20190093682A1

公开(公告)日：2019-03-28

申请号：US15718960

申请日：2017-09-28

申请人： Fisher Controls International LLC

发明人： Michael R. Fontaine ,  David L. Smid

IPC分类号： F15B15/20 ,  F15B15/14

CPC分类号： F15B15/20 ,  F15B15/14 ,  F15B21/087 ,  F15B2211/6313 ,  F15B2211/6336 ,  F15B2211/665 ,  F15B2211/6653 ,  F15B2211/6656 ,  F15B2211/7053 ,  F15B2211/8855 ,  G05B19/44

摘要： Systems and methods may be provided to digitally control both position and crossover pressure in a double-acting pneumatic actuator, in view of constraints (e.g., a deadband range comprising a set point) set on the crossover pressure. Control may be achieved, via a control algorithm (e.g., a Multiple Input Multiple Output (MIMO) control algorithm) acting upon inputs of actuator position feedback and crossover pressure feedback (e.g., as indicated by pressure feedback of each respective pneumatic chamber). Further, the embodiments described herein may reduce the necessary frequency of control actions for adjusting crossover pressure, thus reducing wear on process components, and allowing for finer control of actuator position.

公开(公告)号：US20180345942A1

公开(公告)日：2018-12-06

申请号：US15778948

申请日：2016-11-25

申请人： ADVICS CO., LTD. ,  TOYOTA JIDOSHA KABUSHIKI KAISHA

发明人： Masaki NINOYU ,  Takahiro OKANO

IPC分类号： B60T15/36 ,  B60T15/02

CPC分类号： B60T15/36 ,  B60T7/042 ,  B60T8/36 ,  B60T8/3605 ,  B60T8/4077 ,  B60T13/142 ,  B60T13/146 ,  B60T13/662 ,  B60T13/686 ,  B60T15/028 ,  F15B2211/6656

摘要： A valve control device includes a correction unit that corrects hysteresis in output of a control valve according to an increasing/reducing direction of a control output value; a detection unit configured to detect an actual output value to the control valve corresponding to the control output value; and a forbidding unit configured to forbid correction by the correction unit, until a difference between the control output value and the actual output value becomes within a predetermined range, after the increasing/reducing direction of the control output value is switched.

公开(公告)号：US20180171818A1

公开(公告)日：2018-06-21

申请号：US15843814

申请日：2017-12-15

申请人： Dresser-Rand Company ,  REXA, Inc.

发明人： Shannon Nimchan ,  John Limmer ,  Pedro Lopez ,  Ken Enos

IPC分类号： F01D17/14 ,  F16K31/363

CPC分类号： F01D17/145 ,  F05D2220/31 ,  F05D2260/57 ,  F15B1/26 ,  F15B11/16 ,  F15B13/024 ,  F15B13/06 ,  F15B19/005 ,  F15B20/00 ,  F15B2211/20515 ,  F15B2211/20561 ,  F15B2211/30565 ,  F15B2211/6313 ,  F15B2211/6336 ,  F15B2211/634 ,  F15B2211/6656 ,  F15B2211/7051 ,  F15B2211/7052 ,  F15B2211/7054 ,  F15B2211/85 ,  F15B2211/855 ,  F15B2211/857 ,  F15B2211/8755 ,  F15B2211/8757 ,  F16K31/1221 ,  F16K31/363

摘要： Systems and methods for protecting a turbomachine may include a trip throttle valve having a throttle valve assembly and a trip valve assembly. The trip valve assembly may include a plurality of trip valves fluidly coupled to a hydraulic cylinder of the throttle valve assembly via a first flow path and a second flow path in parallel with one another. The trip valve assembly may also include a plurality of isolation valves fluidly coupled to the hydraulic cylinder via the first flow path and the second flow path. The plurality of isolation valves may be configured to selectively prevent fluid communication between the plurality of trip valves and the hydraulic cylinder to allow testing of one or more of the plurality of trip valves during operation of the turbomachine.

公开(公告)号：US20170364097A1

公开(公告)日：2017-12-21

申请号：US15625977

申请日：2017-06-16

申请人： Moog Inc

发明人： Gregory B. Weber

IPC分类号： G05D7/06 ,  F16K31/02 ,  F16K31/00 ,  F16K37/00 ,  F16K11/07

CPC分类号： G05D7/0623 ,  F15B13/043 ,  F15B13/0438 ,  F15B13/086 ,  F15B19/002 ,  F15B19/005 ,  F15B21/087 ,  F15B2013/0409 ,  F15B2211/615 ,  F15B2211/6306 ,  F15B2211/6309 ,  F15B2211/6316 ,  F15B2211/634 ,  F15B2211/6343 ,  F15B2211/6654 ,  F15B2211/6656 ,  F15B2211/8609 ,  F16K11/07 ,  F16K31/002 ,  F16K31/02 ,  F16K37/0041 ,  F16K37/005 ,  G05D3/12 ,  G05D7/005

摘要： A servovalve system comprising a pilot stage valve in communication with an hydraulic stage valve, the hydraulic stage valve comprising a valve member movably mounted in a valve chamber to selectively meter fluid flow in a flow path from an upstream inlet port to a downstream outlet port and at least two variable-sized orifices disposed in the flow path between the inlet and outlet ports, an upstream pressure sensor, a downstream pressure sensor, a fluid temperature sensor, a position sensor sensing a linear position of the valve member, a controller that receives input from the upstream pressure sensor, the downstream pressure sensor, the fluid temperature sensor and the position sensor; and the controller configured to provide a control signal to the pilot stage valve as a function of the input from the upstream pressure sensor, the downstream pressure sensor, the fluid temperature sensor and the position sensor.

公开(公告)号：US20170211599A1

公开(公告)日：2017-07-27

申请号：US15415140

申请日：2017-01-25

申请人： ENGEL AUSTRIA GmbH

发明人： Anton LOHNECKER ,  Helmut STEINPARZER ,  Herbert ZEIDLHOFER

IPC分类号： F15B15/28 ,  F15B9/03

CPC分类号： F15B15/2884 ,  B29C45/82 ,  B29C2045/826 ,  F15B9/03 ,  F15B11/0423 ,  F15B2211/20515 ,  F15B2211/20546 ,  F15B2211/6303 ,  F15B2211/6306 ,  F15B2211/6336 ,  F15B2211/6651 ,  F15B2211/6652 ,  F15B2211/6656 ,  F15B2211/6657 ,  F15B2211/71 ,  F15B2211/8616

摘要： A hydraulic drive unit for a shaping machine comprising a pump driven by a motor, a closed-loop or open-loop control unit for closed-loop and/or open-loop control of the drive unit to a reference operating point of the drive unit, and a memory connected to the closed-loop or open-loop control unit, wherein a relationship between a parameter characteristic of a sound directly or indirectly caused by the drive unit and a data set representing various operating points of the drive unit is stored in the memory and the closed-loop or open-loop control unit is adapted to select the reference operating point on the basis of the relationship.

公开(公告)号：US09546672B2

公开(公告)日：2017-01-17

申请号：US14489778

申请日：2014-09-18

申请人： Google Inc.

发明人： Alex Perkins ,  Kevin Blankespoor ,  Alfred Rizzi

IPC分类号： F15B9/09 ,  F15B13/02 ,  F15B21/08 ,  F15B15/28 ,  F15B11/048

CPC分类号： F15B13/021 ,  F15B9/09 ,  F15B11/048 ,  F15B15/28 ,  F15B15/2815 ,  F15B21/08 ,  F15B2211/30575 ,  F15B2211/6336 ,  F15B2211/665 ,  F15B2211/6654 ,  F15B2211/6656 ,  F15B2211/6658 ,  F15B2211/7053 ,  F15B2211/755 ,  F15B2211/7653 ,  F15B2211/8606 ,  G05B19/00

摘要： In some applications, a piston of a hydraulic actuator may move at high speeds, and large undesired forces may be generated if the piston reaches an end-stop of the hydraulic actuator at a high speed. The undesired forces may, for example, cause mechanical damage in the hydraulic actuator. A controller may receive information indicative of the piston reaching a first position at a first threshold distance from the end-stop, and, in response, may modify a signal to a valve assembly controlling flow of hydraulic fluid to and from the hydraulic actuator. Further, the controller may receive information indicative of the piston reaching a second position at a second threshold distance closer to the end-stop of the hydraulic actuator, and, in response, the controller may further modify the signal to the valve assembly so as to apply a force on the piston in a away from the end-stop.

摘要翻译： 在一些应用中，液压致动器的活塞可以高速运动，并且如果活塞以高速到达液压致动器的终端，则可能产生大的不期望的力。 例如，不期望的力可能导致液压致动器中的机械损坏。 控制器可以接收指示活塞到达终端的第一阈值距离处的第一位置的信息，并且作为响应，可以将信号修改为控制液压流体流向和从液压致动器流出的阀组件。 此外，控制器可以接收指示活塞到达靠近液压致动器的停止的第二阈值距离处的第二位置的信息，并且作为响应，控制器可以进一步修改到阀组件的信号，以便 在活塞上远离终点站施加力。