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发明公开
CN110998141A 故障安全阀门执行器 有权

故障安全阀门执行器
摘要：
本发明涉及一种故障安全阀门执行器(10)，其包括驱动装置(12)、驱动轴(42)，该驱动轴具有设置成与驱动轴(42)的螺纹部分(44)相邻的离合器(50)，以及一个联接至离合器(50)的离合器执行器(52)，并设置为：在离合器(50)与驱动轴(42)的螺纹部分(44)接合的接合位置和离合器(50)与驱动轴(42)分离的分离位置之间推动离合器(50)。当离合器执行器(52)通电时，离合器(50)作出响应，被推动到接合位置，使得驱动轴(42)与离合器(50)之间的螺纹接合将驱动装置(12)对驱动轴(42)的旋转运动转换为驱动轴(42)的轴向运动，并在驱动装置(12)不作用时，保持将驱动轴(42)抵靠在驱动轴偏置构件上。离合器(50)移动到分离位置，使驱动轴偏置构件自动将驱动轴(42)返回到故障安全位置。
摘要（英）：

A failsafe valve actuator 10 comprises a drive mechanism 12, a drive shaft 42 having a clutch 50 arranged adjacent to a threaded portion 44 of the drive shaft 42, and a clutch actuator 52 coupled to the clutch 50 and arranged to move the clutch 50 between an engaged position in which the clutch 50 engages with the threaded portion 44 of the drive shaft 42 and a disengaged position in which the clutch 50 is disengaged from the drive shaft 42. In response to energisation of the clutch actuator 52, the clutch 50 is moved to the engaged position such that threaded engagement between the drive shaft 42 and clutch 50 transfers rotational movement of the drive shaft 42 by the drive mechanism 12 into axial movement of the drive shaft 42 and holds the drive shaft 42 against a drive shaft bias member (46, Fig. 2b) when the drive mechanism 12 is inactive. Movement of the clutch 50 to the disengaged position causes the drive shaft bias member 46 to automatically return the drive shaft 42 to the failsafe position.

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