LABYRINTH SEAL CENTRIFUGAL COMPRESSOR AND SUPERCHARGER

摘要

The labyrinth seal used in the centrifugal compressor includes a bladed wheel in which the fluid flows in the radial direction and a stop member formed on the back side of the bladed wheel. The labyrinth seal may include a plurality of first convex portions each formed along the circumferential direction at a plurality of radial positions on the back surface of the vane wheel and a plurality of second convex portions formed between the first convex portions and the second convex portion, And a plurality of second convex portions formed along the circumferential direction on the member. A flow path on a labyrinth path including a plurality of minimum clearance portions formed between the first convex portion and the second convex portion is formed between the back surface of the vane wheel and the stop member along the radial direction. Wherein the stop member is located on the upstream side of the minimum clearance portion in the flow direction of the leakage flow passing through the minimum clearance portion formed between the first convex portion and the second convex portion, The backside of the car is located.