Fan rotor protection structure

摘要

A fan rotor protection structure includes a fan wheel and an annular member. The fan wheel has a hub and a plurality of blades. The hub has a top portion and a side wall portion, which together define a receiving space in the hub. The annular member has one side aligned with and connected to an end surface of the side wall portion opposite to the top portion, and defines an opening communicable with the receiving space in the hub. With the annular member, foreign matters are stopped from entering into and accumulating in the fan rotor, enabling largely increased fan service life and more stable flow field around the fan.

主权项

1. A fan rotor protection structure, comprising:
a fan wheel including a hub and a plurality of blades; the hub having a top portion and a side wall portion axially rearwardly extended from a peripheral edge of the top portion, the blades being circumferentially spaced on the side wall portion, and the top portion and the side wall portion together defining a receiving space in the hub; and an annular member having one side aligned with and connected to an end surface of the side wall portion opposite to the top portion, and defining an opening communicable with the receiving space in the hub; the annular member further being provided with a plurality of holes.