The pump shaft is the central component of a centrifugal pump rotor and carries the impellers, the shaft sleeves (e. g. spacer sleeves between the impellers or shaft protecting sleeves in the shaft seal area), the bearings (rolling element bearings or plain bearing sleeves and thrust collars), in some cases balance
Working principle. Electric submersible pumps are multistage centrifugal pumps operating in a vertical position. ... The pump shaft is connected to the gas separator or the protector by a mechanical coupling at the bottom of the pump. Fluids enter the pump through an intake screen and are lifted by the pump stages.
A shaft sleeve is shaped like a cylindrical hollow metal tube which is mounted over the shaft, this offers the right amount of protection during the packing. Pump shaft, most of the times, offer apt protection from corrosion, erosion.