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公开(公告)号:US20040163386A1
公开(公告)日:2004-08-26
申请号:US10371079
申请日:2003-02-21
申请人: Moog Inc.
发明人: John D. Kopp , Thomas P. Neal
IPC分类号: F16D031/02
CPC分类号: F15B11/17 , F15B7/006 , F15B11/0365 , F15B2211/20561 , F15B2211/20576 , F15B2211/20584 , F15B2211/27 , F15B2211/30505 , F15B2211/40515 , F15B2211/411 , F15B2211/41536 , F15B2211/426 , F15B2211/7056
摘要: A tandem electrohydrostatic actuator (70) broadly includes a first piston (22) operatively arranged in a first cylinder (23), and a second piston (24) operatively arranged in a second cylinder (25). The pistons are coupled to move together. The first piston has a small extend area (35) and a large retract area (36). The second piston has a large extend area (38) and a small retract area (39). The large areas (36, 38) of the pistons are equal to one another and the small areas (35, 39) of the pistons are equal to one another. A reversible fixed-displacement first pump (45) has equal inlet and outlet flows supplied to the small areas of the first and second pistons, respectively. A reversible fixed-displacement second pump (40) has equal inlet and outlet flows supplied to the large areas of the first and second pistons, respectively. The total volume of the fluid in the actuator remains constant at all positions of the pistons. In the preferred embodiment, a connecting rod (26) joins the pistons, an output rod (29) is connected to the first piston and penetrates an end wall (30) of the first cylinder, and a stationary LVDT coil or body (31) has one end attached to an end wall (32) of the second cylinder and has its movable core connected to the connecting rod.
摘要翻译: 串联静电静电致动器(70)广泛地包括可操作地布置在第一气缸(23)中的第一活塞(22)和可操作地布置在第二气缸(25)中的第二活塞(24)。 活塞联接以一起移动。 第一活塞具有小的延伸区域(35)和大的缩回区域(36)。 第二活塞具有大的延伸区域(38)和小的缩回区域(39)。 活塞的大面积(36,38)彼此相等,并且活塞的小区域(35,39)彼此相等。 可逆的固定位移第一泵(45)具有分别供应到第一和第二活塞的小区域的相等的入口和出口流。 可逆式固定排量第二泵(40)具有相应的入口和出口流量,分别供应到第一和第二活塞的大面积区域。 执行器中的流体总体积在活塞的所有位置保持恒定。 在优选实施例中,连杆(26)连接活塞,输出杆(29)连接到第一活塞并且穿过第一气缸的端壁(30),并且固定的LVDT线圈或主体(31) 其一端连接到第二气缸的端壁(32),并且其可动芯部连接到连接杆。