| 摘要 |
A ROTARY VALVE ACTUATOR AND LINKAGE PROVIDE AN ACTUATOR HAVING A TUBULAR HOUSING (48) WITH END CAPS (102, 130) AND A PISTON (82) THAT IS MOVED BY FLUID PRESSURE AGAINST A COMPRESSION SPRING (98). A ROLLING DIAPHRAGM (142) IS USED TO BIAS THE PISTON. A PAIR OF PORTS (60) ARE PROVIDED ON OPPOSITE SIDES OF THE HOUSING AND A LINKAGE (62) HAVING TWO ARMS (64, 66) IS INTERCONNECTED WITH THE PISTON THROUGH THE PORTS. THE LINKAGE IS COUPLED TO A ROTARY VALVE SHAFT (68) AND LINEAR MOVEMENT OF THE PISTON (82) CAUSES ROTATIONAL MOVEMENT OF THE SHAFT. THE LINKAGE (62) INCLUDES TWO SEPARATE ARMS (64, 66) AND A ENTERPIECE. THE ARMS AND THE CENTERPIECE INTERENGAGE EACH OTHER AT ANGLED SURFACES THAT FORCE THE CENTERPIECE AND THE ARMS (64, 66) INTO RADIAL ENGAGEMENT WITH THE SHAFT (68) WHEN AXIAL COMPRESSION IS PROVIDED TO THE ARMS AND CENTERPIECE TO FORCE THEMTOWARD EACH OTHER. (FIG. 3)
|
