AIR-OPERATED DRIVE WITH JET ACTUATOR FOR PIPELINE BALL VALVES (VERSIONS)

摘要

FIELD: engines and pumps.;SUBSTANCE: proposed driver comprises sequentially coupled control device, motor, reduction gear and screw-link mechanism. The latter includes link, actuator screw, sliding nut, device to absorb kinetic energy of the drive moving parts, the drive representing a pack of plate springs coupled with actuator screw via thrust bearings. Note here that said pack of springs is arranged to limit axial displacement (compression) with no angular shift.;EFFECT: higher reliability.;3 cl, 4 dwg