公开(公告)号：US12129021B2

公开(公告)日：2024-10-29

申请号：US17658176

申请日：2022-04-06

申请人： The Boeing Company

发明人： Eric B. Gilbert

IPC分类号： B64C27/00 ,  F15B15/20 ,  F15B21/00

CPC分类号： B64C27/001 ,  F15B15/20 ,  F15B21/008 ,  B64C2027/004 ,  F15B2211/63 ,  F15B2211/8616

摘要： A tail-rotor vibration dampener system for an aircraft is provided. The system includes a fuselage and an open rotor assembly including a powerplant and a set of rotor blades. The system further includes at least one actuator unit connecting the open rotor assembly to the fuselage. The actuator unit includes a hydraulic actuator controlling a position of the open rotor assembly in relation to the fuselage and a dampening device operable to cancel a vibration emanating from the open rotor assembly. The system further includes a computerized vibration dampening controller, including programming to determine a frequency of the vibration emanating from the open rotor assembly and control the dampening device to cancel the vibration emanating from the open rotor assembly based upon the frequency.

公开(公告)号：US12110913B2

公开(公告)日：2024-10-08

申请号：US17497579

申请日：2021-10-08

申请人： The Boeing Company

发明人： Neal Van Huynh

IPC分类号： F15B13/04 ,  B64C13/40 ,  B64C13/50 ,  F15B13/043 ,  F15B13/044 ,  F15B21/00 ,  F15B21/0423 ,  F15B21/0427

CPC分类号： F15B13/0407 ,  F15B13/0436 ,  F15B13/044 ,  F15B21/008 ,  F15B21/0423 ,  F15B21/0427 ,  B64C13/40 ,  B64C13/50 ,  B64C13/504 ,  F15B2211/526 ,  F15B2211/528 ,  F15B2211/6303 ,  F15B2211/6336 ,  F15B2211/634

摘要： Electro-hydraulic servo-valves and related methods are disclosed herein. An example electro-hydraulic servo-valve includes an inlet to receive a fluid from a reservoir, a torque motor, a chamber, the fluid to return to the reservoir via the chamber, and a flexure tube coupled to the torque motor. At least a portion of the flexure tube is disposed in the chamber. The flexure tube includes a nozzle to deliver the fluid to an actuator. The example electro-hydraulic servo-valve includes a damper operatively coupled to the flexure tube. The damper is disposed in the chamber.

公开(公告)号：US12105538B2

公开(公告)日：2024-10-01

申请号：US17821028

申请日：2022-08-19

申请人： HEWLETT PACKARD ENTERPRISE DEVELOPMENT LP

发明人： Michael Scott ,  Harvey J. Lunsman ,  David Collins

IPC分类号： F15B1/02 ,  F15B1/027 ,  F15B1/033 ,  F15B1/24 ,  F15B21/00 ,  G05D16/10 ,  H05K7/20 ,  F16L55/052 ,  F16L55/053

CPC分类号： G05D16/109 ,  F15B1/021 ,  F15B1/025 ,  F15B1/027 ,  F15B1/033 ,  F15B1/24 ,  F15B21/006 ,  H05K7/20272 ,  H05K7/20281 ,  F15B2201/31 ,  F15B2201/32 ,  F15B2201/413 ,  F16L55/052 ,  F16L55/053

摘要： Example implementations relate to a pressure regulator assembly for a closed fluid loop of a CDU. The pressure regulator assembly has a cylinder having an internal volume, and first and second hollow pistons slidably connected to the cylinder to split the internal volume into a first volume portion having cooling fluid, a second volume portion having driver fluid, and a third volume portion having compressible matter. The first volume portion is fluidically connected to the closed fluid loop. The first hollow piston is reciprocated by the compressible matter to maintain operating pressure of the cooling fluid in the closed fluid loop. The second hollow piston is driven by the driver fluid in response to predefined pressure drop of the cooling fluid during predefined time period, to inject additional cooling fluid from the first volume portion into the closed fluid loop to restore pressure level of cooling fluid to operating pressure.

公开(公告)号：US20240239188A1

公开(公告)日：2024-07-18

申请号：US18514343

申请日：2023-11-20

申请人： Dr. Ing. h.c. F. Porsche Aktiengesellschaft

发明人： Andreas Freuer

IPC分类号： B60K17/06 ,  F04C2/08 ,  F15B21/00

CPC分类号： B60K17/06 ,  F04C2/084 ,  F15B21/008

摘要： A method for controlling a gear pump by a control device to compensate a tooth engagement-induced volume flow pulsation to reduce noise emissions. The method includes acquiring a gear angle and an actual speed of the gear pump; keeping a relationship between a respective modulation angle and an amplitude of a pilot control torque of the gear pump to compensate the volume flow pulsation to an actual speed; modulating the pilot control torque on the basis of the acquired gear angle, a predetermined correction angle, the modulation angle, a number of teeth of the gear pump and the amplitude; and driving the gear pump with a drive torque overlaid with the modulated pilot control torque. The modulation angle is calculated using a PT element with the actual speed as the input variable.

公开(公告)号：US20240200580A1

公开(公告)日：2024-06-20

申请号：US18286568

申请日：2022-03-25

申请人： Schaeffler Technologies AG & Co. KG

发明人： Peter Greb ,  Marco Grethel ,  Peter Biegert

IPC分类号： F15B13/01 ,  F15B11/08 ,  F15B21/00

CPC分类号： F15B13/01 ,  F15B11/08 ,  F15B21/001

摘要： The disclosure relates to a hydraulic system including a reversing pump which has two delivery connections via which a hydraulic medium can be delivered from a tank in opposite delivery directions in order to hydraulically actuate an actuating element and supply a cooling and/or lubricating system. The hydraulic system also includes a valve assembly via which an actuating piston in a double-acting actuating cylinder can be supplied with hydraulic medium.
A first delivery connection of the reversing pump is fluidly connected to a first pressure connection of the double-acting actuating cylinder. A second delivery connection of the reversing pump is fluidly connected to a second pressure connection of the double-acting actuating cylinder. The actuating piston is mechanically coupled to a valve piston of a valve, and the valve piston is mechanically coupled to a locking device and to the actuating element.

公开(公告)号：US11988234B2

公开(公告)日：2024-05-21

申请号：US17845083

申请日：2022-06-21

申请人： Nott Company

发明人： Dusten Carl O'Konek, Jr. ,  Anthony Reid Hennum

IPC分类号： F15B21/00 ,  F04B39/00 ,  F04B53/00 ,  F04B53/08 ,  F04B53/16

CPC分类号： F15B21/008 ,  F04B53/08 ,  F04B53/16 ,  F04B39/0027 ,  F04B53/002

摘要： The disclosure relates to an electronic pump that can be used in a motor vehicle, particularly for generating hydraulic fluid flow for steering and braking, or to perform auxiliary functions such as dump bodies for garbage trucks or landscape trucks. Methods of operating the system and manufacturing the system are also provided.

公开(公告)号：US11971099B2

公开(公告)日：2024-04-30

申请号：US17947393

申请日：2022-09-19

申请人： Hamm AG

发明人： Thomas Klein ,  Ronny Pieske

IPC分类号： F16H61/4104 ,  E01C19/26 ,  F16H61/4139 ,  F16H61/4148 ,  F16H61/4165 ,  E02F9/22 ,  F15B21/00 ,  F15B21/041 ,  F15B21/0423 ,  F15B21/045

CPC分类号： F16H61/4104 ,  E01C19/26 ,  F16H61/4139 ,  F16H61/4148 ,  F16H61/4165 ,  E02F9/2278 ,  F15B21/005 ,  F15B21/041 ,  F15B21/0423 ,  F15B21/045 ,  F15B2211/611 ,  F15B2211/6343

摘要： A soil processing machine includes a hydraulic drive system including an electrohydraulic pressurized fluid source with at least one electric motor and at least one hydraulic drive pump, a hydraulic drive circuit fed with pressurized fluid by the at least one hydraulic drive pump, at least one hydraulic drive motor fed with pressurized fluid from the hydraulic drive circuit, and a discharge valve assembly for discharging fluid from the hydraulic drive circuit to a fluid reservoir. The hydraulic drive system is designed to operate the discharge valve assembly as a function of at least one of the following parameters: a temperature of the fluid in the hydraulic drive circuit, an ambient temperature, a viscosity of the fluid in the hydraulic drive circuit, a degree of contamination of the fluid in the hydraulic drive circuit, a period of time since the last start-up of the hydraulic drive system, a period of time since the last fluid was discharged from the hydraulic drive circuit.

公开(公告)号：US20240110581A1

公开(公告)日：2024-04-04

申请号：US18265134

申请日：2021-11-29

申请人： HD Hyundai Infracore Co., Ltd.

发明人： Yong Lak CHO

IPC分类号： F15B13/042 ,  E02F9/22 ,  F04B49/08 ,  F15B13/04 ,  F15B21/00

CPC分类号： F15B13/042 ,  E02F9/2278 ,  F04B49/08 ,  F15B13/04 ,  F15B21/001

摘要： A hydraulic system comprises: a hydraulic pump that includes an swash plate; an swash plate angle sensor for measuring the angle of the swash plate; an swash plate driving piston for moving the swash plate of the hydraulic pump in response to changes in pressure applied to a large diameter section; an swash plate control hydraulic line for supplying the large diameter section with a portion of the hydraulic oil discharged by the hydraulic pump; a control valve that controls the flow rate of the hydraulic oil that is following into and out of the large diameter section; an electro-proportional pressure reducing valve for producing pilot pressure that is to be transmitted to one side of the control valve; and a control device for controlling the electro-proportional pressure reducing valve according to an operation signal of an operation device and the angle information from the swash plate angle sensor.

公开(公告)号：US20240084829A1

公开(公告)日：2024-03-14

申请号：US18457980

申请日：2023-08-29

申请人： Robert Bosch GmbH

发明人： Andreas Guender ,  Henning Noack ,  Johannes Schwacke ,  Ludwig Brandt ,  Rebecca Lacour

IPC分类号： F15B21/00 ,  F15B13/02 ,  F15B15/18 ,  F15B19/00

CPC分类号： F15B21/00 ,  F15B13/024 ,  F15B13/027 ,  F15B15/18 ,  F15B19/00 ,  F15B2211/7053

摘要： A hydraulic drive for a hydraulic consumer alternately pressurized in opposite directions during operation is disclosed. The hydraulic drive includes (i) first and second hydraulic power outputs, (ii) a hydraulic machine driven by an electric machine, said hydraulic drive comprising a first hydraulic working output which is connected to the first drive output via a first hydraulic line, and comprising a second hydraulic working output connected to the second drive output via a second hydraulic line, (iii) an infeed device which is configured to feed hydraulic fluid from a tank into the first and/or the second line in a pressure-dependent manner by way of an infeed line, and (iv) a outfeed device which is configured to selectively open or close a hydraulic connection between the first hydraulic line and a hydraulic outfeed line which is hydraulically connected to the tank in a controllable manner and a hydraulic connection between the second hydraulic line and the hydraulic outfeed line to be selectively opened or closed in a controllable manner.

公开(公告)号：US11885453B2

公开(公告)日：2024-01-30

申请号：US17053136

申请日：2019-04-12

申请人： HYDAC TECHNOLOGY GMBH

发明人： Herbert Baltes ,  Peter Kloft

IPC分类号： F04B11/00 ,  F16L55/04 ,  F16L55/027 ,  F15B21/00

CPC分类号： F16L55/02736 ,  F04B11/00 ,  F04B11/0091 ,  F16L55/04 ,  F16L55/041 ,  F15B21/008 ,  F15B2211/8616

摘要： A damping device, in particular for damping or preventing pressure surges, such as pulsations, in hydraulic supply circuits, preferably in the form of a silencer, has a damping housing (2) encompassing a damping chamber (10). The damping housing (2) has at least one fluid inlet (6) and at least one fluid outlet (8), as well as a fluid receiving chamber extending between the fluid inlet (6) and the fluid outlet (8). During operation of the device, a fluid flow coming from the fluid inlet (6) passes through the damping chamber (10) towards the fluid outlet (8). A wall part of the fluid receiving chamber extends as a guide element (16) in at least one direction of extension transverse to the direction of the fluid flow. In the damping chamber (10), several guide elements (16) are provided, against which guide elements the fluid can flow to alter the flow velocity in certain areas.