| 摘要 |
<p>A pneumatic actuator (1, 61) for final control elements has a drive housing (6) and a drive member (15) movable in the drive housing (6). A drive element (24) for operating the actuator (1, 61) is fastened to the drive member (15). The drive element (24) emerges from the drive housing (6) and is movable with the drive member (15). The drive member (15) divides the drive housing (6) into a pressure chamber (16) and a restoring chamber (17) with a restoring member (19, 20) acting upon the drive member (15). Furthermore, the actuator (1, 61) has a position controller (41), the outlet (48) of which leads into an internal supply passage (49) which is connected to a restoring-chamber-side transfer connection (35, 62) at the drive element (24), the drive element (24) having an air-conducting passage (30) starting from the transfer connection (35, 62) and leading into the pressure chamber (16). According to the invention, the restoring chamber (17) has a connection opening (34) which is connected to the air-supply passage (49), and the transfer connection (35, 62) is a separate component which is inserted into the restoring chamber (17) and connects the connection opening (34) to the air-conducting passage (30). <IMAGE></p> |
