phase-shift gear train for a on-load tap-changer or phase selector of a step-down transformer, in which at least one crank-driven eccentric disc interacts with a deflection disc with gear elements disposed therein; which are rotatably connected to a switching axis, wherein at least one eccentric disc, in interaction with the deflection disc engagement elements, gradually rotates the switching axis around a pitch angle.

摘要

Phase-shift gear unit for a on-load tap-changer or phase selector of a step-down transformer, in which at least one crank-driven eccentric disc interacts with a deflection disc with gear elements disposed therein. which are rotatably connected to a commutation axis, wherein at least one eccentric disc, in interaction with the deflection disc engaging elements, gradually rotates the commutation axis around a pitch angle. refers to a phase shift gear train (10) for a on-load tap-changer or phase selector of a step-down transformer, in which at least one eccentric disc (18; 20) is driven by a crank mechanism (12). ) interacts with a deflection disc (22) with gear elements (24) disposed therein which are rotatably connected to a switching shaft (40), wherein the at least one eccentric disc (18, 20), in interaction with the deflection disc (22) engaging elements (24), gradually rotates the switching axis (40) about a pitch angle. It is provided that the gear elements (24) are formed by rollers (26) rotatably biased on a flat side, close to the outer circumference of the disc (22), which roll with a corresponding gear contour on the outer surface of the cams (18; 20) with eccentric (30; 42) concave and convex sections that regularly follow each other and transit one over the other.