| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a vortex pump that improves gas exhaust performance to reduce restrictions on pump posture during self-priming and to prevent a gas from staying in a pump chamber. <P>SOLUTION: The vortex pump includes: a vane 18 pressurizing fluid by rotation: an impeller 4 having the vane 18 on an outer periphery; the pump chamber 1 storing the impeller 4 therein; and a motor rotating the impeller 4. The pump further has a channel 5 where the fluid flows, on an outer periphery side of the vane 18. The pump chamber 1 includes: a suction pipe 21 communicating with an upstream end 6 of the channel 5; an discharge pipe 22 communication with a downstream end 7 of the channel 5; and a gas-liquid separation part for separating the fluid into gas and liquid at the downstream end 7. A casing forming the pump chamber 1 has a surface facing the impeller 4, and the discharge pipe 22 is opened on the facing surface. In addition, a protrusion 27 circumferentially having a plane is disposed on a portion forming the downstream end 7 of the channel 5 on the facing surface, and the plane serves as a collision surface 44 of the gas-liquid separation part. <P>COPYRIGHT: (C)2012,JPO&INPIT |
