FIELD: engines and pumps.
SUBSTANCE: group of inventions relates to well pumping assemblies. Proposed plant comprises engine-driven pump, having number of stages. Each stage has impeller and diffuser. Diffuser and impeller comprises vanes, some of which are located opposite to each other curvilinear surfaces of high and low pressure extending between front and rear edges, and local bulge. Low-pressure surface features length exceeding length of high pressure surface. Local bulge is formed on surface of low pressure. Bulb has curvature radius smaller than the radii of curvature of other surface areas of low pressure. Blade has width, measured from surface of low to high pressure surface, within bulge is more than on other sections.
EFFECT: group of inventions is aimed at increasing efficiency and pump head height that is structure of blades, allow along surface of low pressure in fact, of laminar flow.
20 cl, 6 dwg
