Axial flow fan and large-hub-ratio axial flow fan blade thereof

The utility model relates to the field of fan blades, in particular to an axial flow fan and a large-hub-ratio axial flow fan blade of the axial flow fan. An axial flow fan blade with a large hub ratio comprises a hub and a plurality of axial flow blades regularly arranged on the outer side wall of the hub in the circumferential direction. The ratio of the outer diameter d of the hub to the outer diameter D of the fan blades is larger than 1/2. The axial flow fan blade is higher in strength, suitable for high-speed occasions (the rotating speed is larger than 2800rpm), and capable of obtaining higher static pressure and bringing larger lift while large air volume is achieved. 本实用新型涉及风叶领域，尤其涉及一种轴流风机及其大轮毂比轴流风叶。一种大轮毂比轴流风叶，包括轮毂，以及沿周向规则布置于轮毂外侧壁上的多片轴流叶片；所述轮毂的外径d与风叶的外径D的比值大于1/2。该轴流风叶的强度更高，适用高速场合（转速＞2800rpm），在大风量的同时能得到更高的静压，带来更大的扬程。