| 摘要 |
<P>PROBLEM TO BE SOLVED: To suppress the generation of vibration by eliminating the imbalance of a fluid force which is generated when an impeller device is rotated in liquid by a simple constitution. <P>SOLUTION: Three protrusions 61 for receiving bolts are formed at the ceiling face 30 of an impeller device body 11a at equal intervals, and a circular lid 70 having a notched center is attached on the protrusions 61 with the bolts 60. A balance weight 80 is attached to the backside (inside) of the lid 70 with the bolts, and the lid 70 is arranged so that the balance weight 80 is arranged in a recess 33 formed at part of the ceiling face 30. The fluid force applied on a blade at the rotation of the impeller device is canceled by a centrifugal force applied on the balance weight 80, and the generation of the vibration is suppressed. <P>COPYRIGHT: (C)2012,JPO&INPIT |
