| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an aeration water turbine capable of efficiently stirring water and air and producing a sufficient water flow for circulating water including air over a water tank. <P>SOLUTION: A plurality of holes 2g and slots 2h for the purpose of reducing weight and a rotational resistance force of a blade 2 are provided at the top end portion 2b and the body portion 2c in a central portion 2a of the blade 2, and an attachment portion 2j for attaching the body portion to a body rotating portion of a water turbine 1 is provided at the body portion 2c of the central portion 2a, so that a contact line of the top end portion 2b of the central portion 2a of the blade can have approximately 90 degrees with regard to an outer circumferential circle (not illustrated) on a rotation track of the top end portion 2b. Both edge portions 2d are wholly bent into a recess surface in a rotational direction, and a contact line of a top end portion 2e is formed to be along the outer circumferential circle, and moreover, both the edge portions 2d are formed to recess in the rotational direction on the side farther from the central portion in a cross section in parallel to the rotating shaft, so that four partitioning plates 2i are placed on one side of a front surface of the body portion 2f each in a direction where the rotating shaft side is separated more from the central side than the top end side. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
