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1. 发明申请

US20230026318A1 ELECTROHYDROSTATIC SYSTEM WITH PRESSURE SENSOR 有权
公开(公告)号：US20230026318A1
公开(公告)日：2023-01-26
申请号：US17779622
申请日：2020-11-18
申请人： Moog GmbH
发明人： Sascha Dany , Sven Müller , Kohlhaas Reiner
IPC分类号： B30B15/20 , B30B15/28 , F15B15/18 , F15B13/02 , F15B20/00
摘要： The present invention relates to an electrohydrostatic system having a hydraulic cylinder comprising a first cylinder chamber and a second cylinder chamber. Furthermore, the electrohydrostatic system has a fluid hydraulic supply device for providing a hydraulic fluid, a fluid hydraulic motor pump unit, designed to provide a fluid hydraulic volume flow in order to move the hydraulic cylinder. A motor control device is designed to provide a rated current for an electrical drive of the fluid hydraulic motor pump unit. Moreover, the electrohydrostatic system has at least one fluid hydraulic safety valve, which on a first valve side is connected to one of the cylinder chambers of the hydraulic cylinder and on a second valve side is connected to the fluid hydraulic motor pump unit. The fluid hydraulic safety valve can be bridged via a bypass connection with a fixed orifice plate, wherein the bypass connection is connected to the first valve side and to the second valve side of the at least one fluid hydraulic safety valve. Moreover, the electrohydrostatic system has a pressure sensor that is connected to one of the cylinder chambers of the hydraulic cylinder. The pressure sensor is designed to detect a fluid hydraulic pressure on one of the cylinder chambers and, according to the detected fluid hydraulic pressure, to provide an enabling signal for the motor control device to provide the rated current for the electrical drive of the fluid hydraulic motor pump unit.

2. 发明申请

US20210332831A1 Electrohydrostatic Actuator System with an Expansion Reservoir 有权
公开(公告)号：US20210332831A1
公开(公告)日：2021-10-28
申请号：US17268318
申请日：2019-08-08
申请人： Moog GmbH
发明人： Sascha Dany , Reiner Kohlhaas , Achim Helbig , Werner Handle
IPC分类号： F15B1/26 , F15B7/00 , F15B11/17
摘要： An electrohydrostatic actuator system comprising: a volume- and/or speed-variable hydraulic machine which is driven by an electric motor, for providing a volumetric flow of a hydraulic fluid; a differential cylinder with a piston side and a ring side; and at least one pretensioning source. The actuator system has a closed hydraulic circuit, wherein, during operation, the hydraulic fluid in the hydraulic circuit is pressurized by means of the hydraulic machine and/or the pretensioning source. Furthermore, according to the invention, the differential cylinder provides a power motion operating mode and a rapid motion operating mode. In order to balance a volume of the hydraulic fluid in the closed hydraulic circuit, according to the invention an expansion reservoir is connected to the piston side of the differential cylinder via a valve.

3. 发明授权

US11053957B2 Actuating drive having a hydraulic outflow booster 有权
公开(公告)号：US11053957B2
公开(公告)日：2021-07-06
申请号：US16772246
申请日：2018-12-14
申请人： MOOG GmbH
发明人： Achim Helbig , Sascha Dany , Udo Koelbl , Werner Haendle
IPC分类号： F01D17/26 , F15B11/08 , F15B21/14
摘要： An electro-hydrostatic actuating drive has a variable-volume and/or variable-speed hydraulic machine, which is driven by an electric motor, for the provision of a volumetric flow of a hydraulic fluid. Furthermore, the actuating drive comprises a cylinder with a piston, a piston rod and a first piston chamber, a valve with a first position and a second position, which valve can be moved by a first hydraulic actuator into the first position and by a second hydraulic actuator into the second position, wherein the second position controls a greater volumetric flow of the hydraulic fluid than the first position, a sink, a main line which connects a first piston chamber of the cylinder to the sink and in which the hydraulic machine is arranged, an auxiliary line which connects the first piston chamber to the sink and in which the valve is arranged, a first control line to the first hydraulic actuator, and a second control line to the second hydraulic actuator. A hydraulic resistor is arranged in the main line in series with the hydraulic machine, the first control line is connected to the main line, and the second control line is connected between the hydraulic resistor and the first piston chamber.

4. 发明授权

US11603867B2 Electrohydrostatic actuator system with an expansion reservoir 有权
公开(公告)号：US11603867B2
公开(公告)日：2023-03-14
申请号：US17268318
申请日：2019-08-08
申请人： Moog GmbH
发明人： Sascha Dany , Reiner Kohlhaas , Achim Helbig , Werner Handle
IPC分类号： F15B1/26 , F15B7/00 , F15B11/17
摘要： An electrohydrostatic actuator system comprising: a volume- and/or speed-variable hydraulic machine which is driven by an electric motor, for providing a volumetric flow of a hydraulic fluid; a differential cylinder with a piston side and a ring side; and at least one pretensioning source. The actuator system has a closed hydraulic circuit, wherein, during operation, the hydraulic fluid in the hydraulic circuit is pressurized by means of the hydraulic machine and/or the pretensioning source. Furthermore, according to the invention, the differential cylinder provides a power motion operating mode and a rapid motion operating mode. In order to balance a volume of the hydraulic fluid in the closed hydraulic circuit, according to the invention an expansion reservoir is connected to the piston side of the differential cylinder via a valve.

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