To provide a centrifugal pump requiring no shaft seal mechanism and free from leakage.
A sealless-type centrifugal pump 1 includes a casing 10 forming a pump chamber 12 with an inflow port 11 and an outflow port for liquid, an impeller 30 disposed inside the pump chamber 12 and rotatably supported by a pivot bearing 20, and a magnetic coupling device 40 rotatively driving a permanent magnet 41 built in the impeller 30 through a partition. The impeller 30 supported in the direction of the rotation axis with respect to the casing 10 is driven by the magnetic coupling device 40, and pressure is applied to the liquid introduced from the direction of the rotation axis through the inflow port 11 to send the liquid through the outflow port in the radial direction. The magnetic coupling device 40 is disposed on a line inclined from an impeller rotating surface to an inflow port 11 side toward the center of the rotation axis, and a through-hole 33 in the direction of the rotation axis is formed at the center of rotation of the impeller 30.
NAKAJIMA SHOGO
HIDAKA TATSUYA
YAMAMOTO YASUHARU
OKUBO TAKESHI
| JPS4317206B1 | 1968-07-20 | |||
| JPS62284995A | 1987-12-10 | |||
| JP2004144070A | 2004-05-20 | |||
| JP2002089491A | 2002-03-27 |
| US6722863B2 | 2004-04-20 |
Kunio Ueda