Pump impeller with adjustable blades

Details Pump impeller with adjustable blades Pump impeller with adjustable blades

F - Mech Eng,Light,Heat,Weapons

04

C

F04C 2/344 (2006.01) F04D 15/00 (2006.01) F04D 29/22 (2006.01)

Patent

CA 2189379

The pump has an impeller with a retractable component, which, when moved, exposes more or less of the impeller blades, thereby varying the pumping action.The pump has rotor and stator sleeves with complementary tapered surfaces, in which a groove conveys barrier liquid towards the impeller. A piston and cylinder receives the liquid thus conveyed. The pressure of the liquid is controlled by a pressure regulator. A spring biasses the moveable impeller blades one way, and the piston and cylinder oppose that force, whereby the exposure of the impeller blades can be controlled.

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