Locking actuator stem and rod end bearing apparatus for use with fluid valves

摘要

Actuator stem and rod end bearings having locking mechanisms are described. An example apparatus for use with a control valve actuator includes a rod end bearing having a bearing retainer and a shaft portion extending from the bearing retainer, where the shaft portion defines a first face. An actuator stem has a first end to be operatively coupled to a diaphragm plate of the control valve actuator and a second end to be coupled to the rod end bearing, where the second end defines a second face. The first face engages the second face to provide a lock that prevents rotation of the actuator stem relative to the rod end bearing when the actuator stem is rotated in a first direction.

主权项

1. An apparatus for use with a control valve actuator, the apparatus comprising:
a rod end bearing having a bearing retainer and a shaft portion extending from the bearing retainer, the shaft portion defining a first face and a first bore; and an actuator stem having a first end to be operatively coupled to a diaphragm plate of the control valve actuator and a second end to be coupled to the rod end bearing, the second end defining a second face and a second bore, the first face and the second face include complementary-shaped portions that interlock when the first face is in engagement with the second face to provide a lock that prevents rotation of the actuator stem relative to the rod end bearing when the actuator stem is rotated in a first direction, the first bore to be coaxially aligned with the second bore when the first face is in engagement with the second face.