FIELD: engines and pumps.
SUBSTANCE: group of inventions relates to pumps and pumping methods using two fluid drivers, each of which is combined with an independently driven prime drive. Pump 10 includes casing 20 forming internal volume 11. Casing 20 comprises at least one end plate 80, 82, which may be part of the wall of casing 20. Each plate 80, 82 contains a protruding part having two recesses 53. Each recess 53 is adapted to accommodate one end of fluid drivers 40, 60. Plate 80, 82 aligns the fluid displacement elements with respect to each other so the fluid displacement elements can pump the fluid during rotation. Plates 80, 82 may include cooling grooves connecting corresponding recesses 53. Said cooling grooves are designed so that a certain part of the fluid, transferred to internal volume 11, is directed towards the bearings located in recesses 53, while rotating fluid drivers 40, 60.
EFFECT: group of inventions is aimed at eliminating the problems of fouling of pumps.
75 cl, 18 dwg
