Impeller of centrifugal fan

The invention discloses an impeller of a centrifugal fan. The impeller of the centrifugal fan comprises a front coil (1) and a back coil (2). A plurality of blades (3) are welded and fixed between the front coil and the back coil, vertical fracture surfaces of the blades are undulate, and horizontal fracture surface are circular-arc-shaped. The vertical fracture surfaces of the blades simulate the shell shape of a humpback and the horizontal fracture surfaces of the blades simulate the dorsal fin shape of the humpback. The eddy separation position at outlets of the blades is changed, the distance between eddy centers is enlarged, and the disturbance of eddy separation to flow is restrained, so that aerodynamic noise is reduced. The impeller of the centrifugal fan has the advantages of bionic noise reduction, good aerodynamics, high efficiency and the like. 本发明公开了种离心风机叶轮，其包括前圈（1）和后圈（2），前圈与后圈之间焊接固定多个叶片（3），叶片的纵向断面呈波浪形，横向断面呈圆弧形，叶片纵向断面仿生座头鲸的贝壳外形，叶片横向断面仿生座头鲸的背鳍外形。本发明离心风机叶轮的结构改变了叶片出口处涡流脱离的位置，增大了涡心之间的距离，抑制了涡流脱离对流动的扰动