| 摘要 |
<p>A rotor ventilator which includes a base to which a shaft is connected to extend upwardly therefrom and a rotor. The rotor is rotatable about the shaft and includes a plate and a plurality of vanes (19) extending therefrom. Also included is a bearing means (30) for supporting the rotor on the shaft. The bearing means can be a double race assembly and is located at the plate, above the centre of gravity of the rotor. A deflector (58) can be located between the base and the plate to deflect gas away from the bearing means.</p> |
