| 摘要 |
pump units for lifting liquid from very deep boreholes. SUBSTANCE: pump unit has rod-line pump with balancer 1, column of rods 2 suspended to balancer 1 by means of cable 3, and rod rotor 4 whose handle 5 is joined with balancer 1 by means of flexible member 6. The latter is joined to balancer 1 at distance L from axis 7 of its rocking; mentioned distance L exceeds radius R of balancer head. EFFECT: improved reliability of pump unit due to reliable work of rod rotor and eliminating torsion of hanger cable. 3 cl, 4 dwg
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