Screw-type water pump - has inclined cylindrical rotor guide which is non-cylindrical at discharge point

摘要

The screw-type pump for lifting liquid has a rotor working in an inclined cylindrical guide. - Before and at the discharge point the guide (V1) is non-cylindrical, while the rotor blades can be at an angle other than 90 deg. to its axis. A plate can be fitted between the central rotor tube (B) and each blade.