| 摘要 |
<p>An agitator (10) has a rotatable tubular shaft (12) supported on which there are blades (24). The tubular shaft (12) is closed at the bottom. The interior of the tubular shaft (12) which is open at the top communicates with air ducts (52), one of which is formed in each blade (24). The air ducts (52) open into cowls (44) attached to the blade ends. As the tubular shaft (12) rotates, air is drawn downwards from the environment through the tubular shaft (12) and escapes at the cowls (44). The aeration arrangement is suitable, in conjunction with liquid-manure agitators, for the aeration of liquid manure. A similar arrangement can be used, in conjunction with ship's propellers, for the aeration of navigational waters. <IMAGE></p> |
