Axial flow positive displacement worm pump

Details Axial flow positive displacement worm pump Axial flow positive displacement worm pump

F - Mech Eng,Light,Heat,Weapons

04

C

F04C 2/16 (2006.01) F01C 1/16 (2006.01)

Patent

CA 2576684

An axial flow positive displacement worm pump (8) has a pump assembly (15) including inner and outer bodies (12, 14) having offset inner and outer axes (16, 18) respectively extending from an inlet (20) to an outlet (22). At least one of the bodies is rotatable about its axis. The inner and outer bodies (12, 14) have intermeshed inner and outer helical blades (17, 27) wound about the inner and outer axes (16, 18) respectively. The inner and outer helical blades (17, 27) extend radially outwardly and inwardly respectively. One of inner and outer numbers of the inner and outer helical blades (17, 27) respectively is two or more. The number of the outer helical blades (27) is one more or one less than the number of the inner helical blades (17). The inner and outer bodies (12, 14) may both be rotatable about the inner and outer axes (16, 18) respectively in same inner and outer rotational directions (RDI, RDO) respectively and geared together in a fixed gear ratio.

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