| 摘要 |
The present invention relates to a rotor. The rotor of the present invention comprises: a rotary shaft (10) having supporting parts (12) at both ends of a hollow part (14); and a plurality of salient poles (24) provided at predetermined intervals on the outer surface of the hollow part (14), and has a plurality of cooling fans (26) arranged along both end edges of the hollow part (14) so as to form an air current flowing to the salient poles (24). The hollow part (14) has an inner space (20) formed therein, and ejection holes (22) are formed to be open to the outer surface of the hollow part (14) so as to make the inner space (20) communicate with the outside. The ejection holes (22) are formed in a region extending from the longitudinal middle of the hollow part (14) toward both end portions thereof. Flanges (16) are formed at the end portions of the supporting parts (12), and inflow holes (18) are formed at the flanges (16) so as to allow air to flow into the inner space (20) due to a difference in air pressure generated by rotation. According to the present invention as above, the weight of the rotor can be reduced and heat generated from the rotor can be smoothly emitted to the outside, thereby improving the performance and lifespan of the rotor. |
