AXIAL-FLOW FAN IMPELLER VANE ATTACHMENT ASSEMBLY

摘要

FIELD: engines and pumps. ^ SUBSTANCE: axial-flow fan impeller comprises hub accommodating vane root , annular grooves arranged in hub and vane root to make spaces to receive lock ring and locking device. Annular groove made in hub and lock ring surface in contact therewith are corrugated, while locking device is made up of ball spring-loaded retainer arranged in the hub to contact vane root and thrust cup arranged in vane root inner space and thrust by spring to vane bottom to adjust contraction force. Thrust cup surface in contact with vane root bottom surface is corrugated. ^ EFFECT: reliable fan operation thanks to reliable vane attachment. ^ 4 dwg