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11. 发明授权

US5983782A Rotary actuator with hole-in-the-wall for fail safe 失效
标题翻译：带有孔洞的旋转执行器，用于故障安全
公开(公告)号：US5983782A
公开(公告)日：1999-11-16
申请号：US131157
申请日：1998-08-07
申请人： Ivan P. Lebrun , George S. Wieger
发明人： Ivan P. Lebrun , George S. Wieger
IPC分类号： F15B11/12 , F15B15/12 , F15B20/00 , F01C9/00
CPC分类号： F15B11/121 , F15B15/12 , F15B20/00
摘要： A fluid powered rotary actuator (10) having a stator (13) and a rotor (15) journalled with limited rotary motion within the stator includes at least one arcuate chamber defined between the rotor and stator and has an angularly movable vane (16) fixed to the rotor. There is a seal member (21, 23) at the vane for slidingly sealing a cylindrical sidewall surface of the stator thereby subdividing the arcuate chamber into two variable volume subchambers (25, 29; 27, 31). Pressurized fluid is ported selectively to one of the subchambers while a fluid egress path for fluid from the other of the subchambers allows the rotor to move angularly within the stator. There is a fail-safe aperture (22) in the cylindrical stator surface in a region traversed by the seal member and for conveying fluid from a selected one of the subchambers, as determined by the position of the vane, and a fail safe valve (24) coupled to and normally blocking the egress of fluid from a subchamber through the aperture (22). The fail-safe valve (24) is energized upon the occurrence of a malfunction to allow fluid flow from the subchamber through the aperture (22). The fail-safe valve (24) may further provide a pressurized fluid path (41, 45) to both subchambers with a fluid return path being provided by through the aperture (22) and fail-safe valve 24 upon the occurrence of a malfunction causing the rotor (15) to move to a neutral position upon occurrence of a malfunction.
摘要翻译：具有定子（13）和定子内受限制的旋转运动的转子（15）的流体动力旋转致动器（10）包括限定在转子和定子之间的至少一个弧形室，并且具有固定的角度可动的叶片（16）到转子。在叶片处具有用于滑动地密封定子的圆柱形侧壁表面的密封构件（21,23），从而将弓形室细分成两个可变容积的子室（25,29,27,31）。加压流体被选择性地移动到一个子室中，而来自另一个子室的流体的流体出口路径允许转子在定子内成角度地移动。在由密封构件穿过的区域中的圆柱形定子表面中存在故障安全孔（22），并且用于根据叶片的位置确定的从所选择的一个子室输送流体和故障安全阀（ 24）耦合并且通常阻挡来自子室的流体通过孔（22）的流出。故障安全阀（24）在故障发生时通电，以允许流体从子室流过孔（22）。故障安全阀（24）还可以向两个副室提供加压流体路径（41,45），其中在发生故障导致时通过孔（22）和故障安全阀24提供流体返回路径转子（15）在故障发生时移动到中立位置。

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