FIELD: deep-well pumping installations.
SUBSTANCE: installation has submersible pump, columns of bearing pipes, driven shaft made of pumping rods, couplings and bearings, seal, thrust bearing, and drive. The pumping rods are provided with axial working wheels in its middle part and grooves for keys. The convex part of the blades faces the flow. The working wheels are provided with keys having longitudinal cuts. The periphery side of the keys and inner sides of the key grooves are conical. The head of the key is a sector of a ring which is arranged asymmetrically with respect to the longitudinal axis of the key. The head is secured to the working wheel via a fastening member.
EFFECT: enhanced reliability.
1 cl, 6 dwg
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