SUBMERSIBLE PUMP SET Russian patent published in 2014 - IPC F04B47/06 

FIELD: engines and pumps.

SUBSTANCE: invention relates to the field of pump equipment and may be used to lift fluid from large depth. A submersible pump set includes an oil-filled body with an elastic shell, a reversible electric motor with a protector, the master shaft of which is connected to a screw of rolling screw-motion drive, which is in mobile connection with the body and connected to a rod of a pump drive, which is compacted in the body and is connected to the nut. The nut by means of a hollow shaft covering the screw is connected with the electric motor shaft and is fixed against axial and radial displacement in the body with the help of bearings. The screw aligned in the body and connected by the upper end with the pump drive rod, when interacting with the nut, is made as capable of reciprocal movements inside the hollow shaft and the body, thus driving the pump. Dampers are made in a single unit, which is connected to the screw and the pump drive rod.

EFFECT: increased reliability of operation of a submersible pump set and increased resources of rolling screw-motion drive due to prevention of its damage, arising due to twisting and axial load, and also a possibility to increase critical frequency of screw rotation.

2 cl, 2 dwg