Improved high-pressure axial-flow fan blade and contra-rotating axial-flow fan having the same

摘要

A bird wing type high-pressure axial-flow fan blade comprising a blade body 1 and a blade shank 2, wherein the blade body is constituted by a blade head 101, a blade top 102, a blade tail 103 and a blade root 104, a windward side of the blade is a blade basin 106, a leeward side of the blade is a blade bow 107, the cross section of the blade from the blade root to the blade top is in a twisted shape, and the blade basin of the blade has an arc-shaped protrusion 108 running along an axis of the blade body from the blade top to the blade root. The fan comprises a wind inlet-side blade and a wind outlet-side blade, the wind inlet-side blade and the wind outlet-side blade are respectively driven by independent electric motors arranged opposite each other, the blade tail of the wind inlet-side blade and the blade head of the wind outlet-side blade are arranged opposite each other, and the blade tail of the wind inlet-side blade and the blade head of the wind outlet-side blade are straight edges parallel to a central axis.