公开(公告)号：EP1498614A3

公开(公告)日：2005-06-29

申请号：EP04016235.6

申请日：2004-07-09

申请人： Young & Franklin, Inc.

发明人： Silva, Gabriel, Dr. ,  Faso, David J.

IPC分类号： F15B1/02 ,  F15B20/00

CPC分类号： F15B1/022 ,  F15B20/004

摘要： An electro-hydrostatic actuator unit that contains a sealed pressurized housing (12) filled with a dielectric fluid. A bi-directional motor (47) is immersed in the fluid and drives a gear pump (48) for exchanging fluid via a control circuit between the chambers (40,41) of a bi-directional hydraulic actuator (37) in response to an input from a controller (50). The chambers (40,41) are separated by a piston (38) and a piston rod (42) is connected to an external load such as a plunger type valve. A failsafe circuit is also provided which is arranged to override the control circuit in the event a failsafe condition is detected by the unit controller (50). The failsafe circuit contains a motor (52) driven pump (53) that provides high pressure fluid from the pressurized reservoir (12) to an accumulator (83). Valves (88,89) are arranged to shut down the control circuit and deliver fluid from the accumulator (83) to one of the cylinder (37) chambers to rapidly move the actuator to a desired failsafe position. Both motor drive pumps (53,58), the actuator (37), cylinder, and the controller (50) are fully immersed in the fluid reservoir (12).

公开(公告)号：EP1498614A2

公开(公告)日：2005-01-19

申请号：EP04016235.6

申请日：2004-07-09

申请人： Young & Franklin, Inc.

发明人： Silva, Gabriel, Dr. ,  Faso, David J.

IPC分类号： F15B1/02 ,  F15B20/00

CPC分类号： F15B1/022 ,  F15B20/004

摘要： An electro-hydrostatic actuator unit that contains a sealed pressurized housing filled with a dielectric fluid. A bi-directional motor is immersed in the fluid and drives a gear pump for exchanging fluid via a control circuit between the chambers of a bi-directional hydraulic actuator in response to an input from a controller. The chambers are separated by a piston and a piston rod is connected to an external load such as a plunger type valve. A failsafe circuit is also provided which is arranged to override the control circuit in the event a failsafe condition is detected by the unit controller. The failsafe circuit contains a motor driven pump that provides high pressure fluid from the pressurized reservoir to an accumulator. Valves are arranged to shut down the control circuit and deliver fluid from the accumulator to one of the cylinder chambers to rapidly move the actuator to a desired failsafe position. Both motor drive pumps, the actuator, cylinder, and the controller are fully immersed in the fluid reservoir.

摘要翻译： 一种静电致动器单元，其包含填充有介电流体的密封的加压壳体（12）。 双向电动机（47）浸入流体中并驱动齿轮泵（48），以响应于双向电动机（47）的响应于双向液压致动器（37）的室（40,41）而经由控制电路交换流体 从控制器（50）输入。 室（40,41）由活塞（38）分开，活塞杆（42）连接到诸如柱塞式阀的外部负载。 还提供了一种故障安全电路，其被布置为在单元控制器（50）检测到故障安全状况的情况下覆盖控制电路。 故障保护电路包括电动机（52）驱动的泵（53），其将高压流体从加压贮存器（12）提供给蓄能器（83）。 阀（88,89）被布置成关闭控制回路并将流体从蓄能器（83）输送到气缸（37）室中的一个，以将致动器快速移动到期望的故障安全位置。 电机驱动泵（53,58），致动器（37），气缸和控制器（50）都完全浸入流体储存器（12）中。