VARIABLE DIFFUSER WITH MOVABLE WALL

摘要

A variable nozzle device comprises an annular passage which is formed by two opposing wall members (3, 6; 17, 18, 6) which are separated along a rotational axis. A rotation conversion mechanism (9, 35; 172, 181) for converting a rotational movement applied to at least one of said wall members (3, 6; 17, 18, 6) into a translatory movement of said at least one of said wall members is provided for adjusting the width of said annular passage.