FIELD: hydraulic machinery; oil producing industry. SUBSTANCE: invention can be used in designing of submersible centrifugal pumps for operation in wells with high content of gas in formation fluid. Pump stage contains guide-vane assembly and impeller made integral with bushing. Outer cylindrical surface of bushing forms friction pair with corresponding inner cylindrical surface of guide-vane assembly. One of parts, whose surfaces form said friction pair, is made of sintered porous metal material, and other one is made of Ni-resists cast iron. At least part of sintered porous metal material is impregnated with alloy featuring high content of copper. Invention is aimed at reduction of cost and increase of manufacturability of pumps stage with improving of antifriction properties of friction pair, increasing corrosion resistance and preventing welding-in of friction parts and reducing time required for working-in of friction surfaces. EFFECT: enlarged operating capabilities. 7 cl, 1 dwg
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