公开(公告)号：US12129878B2

公开(公告)日：2024-10-29

申请号：US18252911

申请日：2021-10-21

申请人： SMC CORPORATION

发明人： Akira Enzaki

IPC分类号： F15B20/00 ,  F15B11/06 ,  G05D16/20

CPC分类号： F15B20/008 ,  F15B11/06 ,  G05D16/2024 ,  G05D16/2033

摘要： An air control circuit including a safety function is simply formed from an air circuit. An air control circuit includes a main air line that controls an air device by concurrently turning on or off two external-pilot-operated electromagnetic valves, a pilot air line that supplies pilot air to the electromagnetic valves, and a pilot control line that switches the pilot air line between a supply state and an exhaust state. When one of the two electromagnetic valves suffers a breakdown to fail to be switched to an off position, air in the air device is exhausted through the other electromagnetic valve that has been switched to the off position to recover the air device, and the pilot air line is switched to the exhaust state by the pilot control line to prevent the two electromagnetic valves from restarting.

公开(公告)号：US12103124B2

公开(公告)日：2024-10-01

申请号：US18241619

申请日：2023-09-01

申请人： Swanson Industries, Inc.

发明人： Christopher Scott Larew

IPC分类号： E21D23/04 ,  B23P6/00 ,  E21D23/00 ,  E21D23/18 ,  F15B20/00

CPC分类号： B23P6/00 ,  E21D23/0078 ,  E21D23/18 ,  F15B20/00 ,  E21D23/0034 ,  E21D23/0436

摘要： A wear pad for a longwall mining shield base lift. The wear pad includes at least one spanner hole for rotating the wear pad with a lever, at least one threaded retaining hole, and a retaining bolt threaded through the retaining hole until it contacts a cylinder rod to which the wear pad is to be attached.

公开(公告)号：US20240279912A1

公开(公告)日：2024-08-22

申请号：US18420974

申请日：2024-01-24

申请人： Caterpillar SARL

发明人： Hideki NAKAJIMA ,  Shino SAKO

IPC分类号： E02F9/26 ,  E02F9/22 ,  F15B20/00

CPC分类号： E02F9/267 ,  E02F9/2267 ,  E02F9/2278 ,  F15B20/007

摘要： Problem: In a hydraulic system in which a manual line relief valve that adjusts the relief setting pressure is arranged in the line relief oil path formed by branching from the actuator line from the control valve to the hydraulic actuator, the relief setting pressure adjustment operation of the line relief valve can be performed independently with good accuracy. Solution: A controller 20 for controlling a perform of a relief setting pressure adjustment operation of a line relief valve 25 is provided with a pump flow control means that controls the pump flow rate during the relief setting pressure adjustment operation, an instruction command output means 54 that instructs a perform of the relief setting pressure adjustment operation by a manual operation, and a notification command output means 55 that notifies that the pump pressure detected by a pressure sensor 31 during the relief setting pressure adjustment operation is within a predetermined range of the target relief setting pressure.

公开(公告)号：US20240218889A1

公开(公告)日：2024-07-04

申请号：US18292429

申请日：2022-04-25

申请人： KYB Corporation

发明人： Tatsuya ITOU ,  Nobuyuki KOBAYASHI ,  Hirotaka KOBAYASHI

IPC分类号： F15B20/00 ,  F16J1/12

CPC分类号： F15B20/00 ,  F16J1/12

摘要： A hydraulic cylinder includes: a cylinder tube; a piston rod; a piston member; a rod inner passage provided within the piston rod, a rod inner passage being configured such that a first opening portion opens at an outer circumferential surface of the piston rod in the cylinder tube, and such that a second opening portion opens outside the cylinder tube; and a sensor part provided outside the cylinder tube, the sensor part being configured to detect that the working fluid is guided to the rod inner passage, the piston member is connected to the piston rod in a state in which one-side end surface is in contact with an annular step portion so as to block the first opening portion of the rod inner passage, the annular step portion being provided on the outer circumferential surface of the piston rod, and the sensor part is configured to detect that the working fluid is guided to the rod inner passage from a rod side chamber and a counter rod side chamber through a gap between the step portion and the piston member.

公开(公告)号：US12025159B2

公开(公告)日：2024-07-02

申请号：US17630653

申请日：2019-12-03

申请人： CHINA OILFIELD SERVICES LIMITED ,  CHINA NATIONAL OFFSHORE OIL CORPORATION

发明人： Zhibin Tian ,  Yongren Feng ,  Tao Lu ,  Lin Huang ,  Tiemin Liu ,  Zanqing Wei ,  Yong Jiang ,  Xiaoqiang Du ,  Liping Liu ,  Xiaodong Chu

IPC分类号： F15B11/17 ,  F15B11/028 ,  F15B11/04 ,  F15B20/00

CPC分类号： F15B11/17 ,  F15B11/028 ,  F15B11/04 ,  F15B20/00 ,  F15B20/004 ,  F15B2211/20515 ,  F15B2211/20576 ,  F15B2211/20584 ,  F15B2211/20592 ,  F15B2211/75

摘要： A hydraulic power system for a downhole device, including a first motor, a first hydraulic pump, a second hydraulic pump, a first main oil circuit, a second main oil circuit, a switching control module and a first execution module. The first motor has a first output shaft which drives the first hydraulic pump and has an oil outlet connected to an input end of the first main oil circuit and a second output shaft which drives the second hydraulic pump and has an oil outlet connected to an input end of the second main oil circuit; the first execution module is connected to an output end of the first main oil circuit; displacement of the first hydraulic pump is smaller than that of the second hydraulic pump; and the switching control module is connected between the first main oil circuit and the second main oil circuit.

公开(公告)号：US12024306B2

公开(公告)日：2024-07-02

申请号：US17581525

申请日：2022-01-21

申请人： Hamilton Sundstrand Corporation

发明人： Ryan Susca ,  Francis P. Marocchini ,  Peter M. Ballard

IPC分类号： B64D31/02 ,  F15B20/00 ,  G05D16/20

CPC分类号： B64D31/02 ,  F15B20/008 ,  G05D16/2022 ,  G05D16/204

摘要： An actuator system can include a first actuator, a second actuator, a first actuator control device configured to control the first actuator, a second actuator control device configured to control the second actuator, a shared redundant actuator control device, and at least one transfer device operatively connected to the first, second, and shared redundant actuator control devices. The at least one transfer device can be configured to be operated to select between a first control mode where the first actuator control device is operatively connected to the first actuator to control the first actuator and the second actuator control device is operatively connected to the second actuator to control the second actuator, a second control mode where the shared redundant actuator control device is operatively connected to the first actuator to control the first actuator and the second actuator control device is operatively connected to the second actuator to control the second actuator, and a third control mode where the first actuator control device is operatively connected to the first actuator to control the first actuator and the shared redundant actuator control device is operatively connected to the second actuator to control the second actuator.

公开(公告)号：US20240124125A1

公开(公告)日：2024-04-18

申请号：US18045958

申请日：2022-10-12

申请人： PRATT & WHITNEY CANADA CORP.

发明人： Jagoda KRZYWON ,  Benoit LACHANCE ,  James Robert JARVO

IPC分类号： B64C11/38 ,  B64C11/40 ,  F03D7/02 ,  F15B20/00

CPC分类号： B64C11/385 ,  B64C11/40 ,  F03D7/0224 ,  F15B20/008

摘要： A propeller blade angle control circuit for a turboprop engine includes a propeller control unit controlling a supply of oil to modify an angle of propeller blades, a pump located upstream of the propeller control unit and providing the supply of oil from an engine oil return system to the propeller control unit, and a flow regulator between the pump and the propeller control unit, the flow regulator modulating a supply of oil to the propeller control unit. A bypass, downstream of the pump in the propeller blade angle control circuit, has an inlet fluidly coupled to the pump. The bypass is operable between a closed position and an open position in which a portion of the oil supplied to the propeller control unit is diverted away from the propeller blade angle control circuit. The open position is engaged when an oil pressure reaches a predetermined threshold.

公开(公告)号：US11953034B2

公开(公告)日：2024-04-09

申请号：US16099154

申请日：2017-05-03

申请人： Baker Hughes Energy Technology UK Limited

发明人： Ajay Kumar Behera ,  Bhasker Rao Keely ,  Nicholas Josep Ellson ,  Andrew Clarke

IPC分类号： F15B19/00 ,  F15B11/10 ,  F16K37/00 ,  F15B20/00

CPC分类号： F15B19/005 ,  F15B11/10 ,  F16K37/0083 ,  F16K37/0091 ,  F15B20/005 ,  F15B2211/212 ,  F15B2211/6306 ,  F15B2211/6309 ,  F15B2211/6313 ,  F15B2211/6326 ,  F15B2211/6336 ,  F15B2211/634 ,  F15B2211/7052 ,  F15B2211/855 ,  F15B2211/857 ,  F15B2211/864 ,  F15B2211/87

摘要： A method for monitoring health of a hydraulic fluid subsystem is presented. The method includes determining a plurality of forces acting on an actuator of the hydraulic fluid subsystem, determining a plurality of parameters based on at least one of an actuator inlet flow rate, an actuator outlet flow rate, and the plurality of forces acting on the actuator, receiving a valve inlet pressure of at least one of oil and gas flowing through a pipe while entering a valve operationally coupled to the actuator and a valve outlet pressure of the at least one of the oil and the gas flowing through the pipe while flowing out of the valve, and monitoring the health of the hydraulic fluid subsystem based on at least one of the plurality of parameters, the valve inlet pressure, and the valve outlet pressure.

公开(公告)号：US11867589B2

公开(公告)日：2024-01-09

申请号：US17346591

申请日：2021-06-14

申请人： Swagelok Company

发明人： William H. Glime, III

IPC分类号： G01M3/02 ,  F15B21/10 ,  F15B15/14 ,  F15B15/22 ,  F15B13/02 ,  F16K37/00 ,  F15B15/20 ,  F15B19/00 ,  F16K3/12 ,  F15B20/00 ,  F15B11/064 ,  F16K31/12

CPC分类号： G01M3/02 ,  F15B13/024 ,  F15B13/027 ,  F15B15/1409 ,  F15B15/204 ,  F15B15/22 ,  F15B19/005 ,  F15B21/10 ,  F16K31/12 ,  F16K37/0041 ,  F15B11/064 ,  F15B20/005 ,  F15B2211/30505 ,  F15B2211/40507 ,  F15B2211/50518 ,  F15B2211/50545 ,  F15B2211/5151 ,  F15B2211/5153 ,  F15B2211/555 ,  F15B2211/632 ,  F15B2211/6306 ,  F15B2211/6309 ,  F15B2211/6313 ,  F15B2211/7052 ,  F15B2211/857 ,  F15B2211/864 ,  F15B2211/865 ,  F15B2211/8606 ,  F15B2211/87 ,  F15B2211/8855

摘要： In an exemplary method of monitoring performance of a fluid driven actuator for a valve, pressurized fluid is supplied through an actuator supply line to an inlet port of the actuator during a first time period to operate the actuator from a normal position to an actuated position. Pressure changes corresponding to a fluid flow condition in the actuator supply line are measured during the first time period, with the measured pressure changes defining a valve cycle pressure profile including a first inflection point corresponding to movement of the actuator from the normal position to the actuated position. The valve cycle pressure profile is analyzed to identify a non-compliant condition in at least one of the valve and the actuator. An output communicating the identified non-compliant condition is then generated.

公开(公告)号：US20230417262A1

公开(公告)日：2023-12-28

申请号：US18252911

申请日：2021-10-21

申请人： SMC CORPORATION

发明人： Akira ENZAKI

IPC分类号： F15B20/00 ,  G05D16/20 ,  F15B11/06

CPC分类号： F15B20/008 ,  G05D16/2033 ,  G05D16/2024 ,  F15B11/06

摘要： An air control circuit including a safety function is simply formed from an air circuit. An air control circuit includes a main air line that controls an air device by concurrently turning on or off two external-pilot-operated electromagnetic valves, a pilot air line that supplies pilot air to the electromagnetic valves, and a pilot control line that switches the pilot air line between a supply state and an exhaust state. When one of the two electromagnetic valves suffers a breakdown to fail to be switched to an off position, air in the air device is exhausted through the other electromagnetic valve that has been switched to the off position to recover the air device, and the pilot air line is switched to the exhaust state by the pilot control line to prevent the two electromagnetic valves from restarting.