Fan blade structure

摘要

A fan blade structure includes a hub, an annular partition surrounding the hub, a first blade group and a second blade group. The hub has a top surface and a flank connected to the top surface. The first blade group, disposed on one side of the annular partition, includes two blade arrays having multiple first and second blades respectively. The clearance between the two adjacent first blades is less than that between the two adjacent second blades. The second blade group, disposed on another side of the annular partition, includes another two blade arrays having a plurality of third and fourth blades respectively. The clearance between the two adjacent third blades is less than that between the two fourth blades adjacent to each other.

主权项

1. A fan blade structure, comprising:
a hub having a top surface and a flank connected to the top surface; an annular partition surrounding the hub; a first blade group disposed on one side of the annular partition, the first blade group comprising a first blade array and a second blade array, the first blade array comprising a plurality of first blades, the second blade array comprising a plurality of second blades, and the clearance between the two first blades adjacent to each other being less than that between the two second blades adjacent to each other; and a second blade group disposed on another side of the annular partition, the second blade group comprising a third blade array and a fourth blade array, the third blade array comprising a plurality of third blades, the fourth blade array comprising a plurality of fourth blades, and the clearance between the two third blades adjacent to each other being less than that between the two fourth blades adjacent to each other, wherein each of the plurality of first blades has a free end relatively away from the hub, and the annular partition extends from the free end towards the hub; and wherein the projection of the first blade array onto the annular partition at least partially overlaps the projection of the fourth blade array onto the annular partition, and the projection of the second blade array onto the annular partition at least partially overlaps the projection of the third blade array onto the annular partition.