Submerged centrifugal electric pump

A submerged centrifugal electric pump, comprising:

• a tubular-shaped external casing comprising a first tubular portion and a second tubular portion, said first tubular portion being connected to said second tubular portion, said first tubular portion defining a first chamber, said second tubular portion defining a second chamber;
• a pumping unit inserted into said first chamber;
• a motor unit axially inserted in said second chamber, said motor unit comprising a motor shaft, said motor shaft being operatively connected to said pumping unit, said motor shaft comprising a motor shaft groove;
• a fixing means for fixing an axial position of said motor shaft between said motor unit and said pumping unit and said fixing means comprising a substantially tubular-shaped occlusion member having an elastic material portion for engaging an internal surface of said casing;
• a tubular-shaped support body inserted in said casing and axially linked to said occlusion member, said occlusion member having internally, in a substantially median position, an annular shoulder for functioning as a stop for a collar profiled externally from said support body;
• a fastening member associated with said occlusion member to perform a radial expansion of said elastic material portion, so as to fasten the elastic material portion against said internal surface of said casing;
• and
• a rolling support structure associated with said motor shaft, said rolling support structure being inserted in a seat of said support body, said rolling support structure comprising a thrust bearing member provided with an internal part, said thrust bearing comprising a ring, said internal part being arranged between a shoulder of said motor shaft and said ring, at least a portion of said ring being arranged in said motor shaft groove, said thrust bearing comprising an external part arranged between another ring engaged in the support body and an internal shoulder of the support body.

A submerged centrifugal electric pump, comprising:

• an external casing comprising a first tubular portion and a second tubular portion, said first tubular portion being connected to said second tubular portion, said first tubular portion defining a first chamber, said second tubular portion defining a second chamber;
• a pumping unit arranged in said first chamber;
• a motor unit arranged in said second chamber, said motor unit comprising a motor shaft, said motor shaft being operatively connected to said pumping unit, said motor shaft comprising a motor shaft groove;
• a fixing means for fixing an axial position of said motor shaft between said motor unit and said pumping unit, said fixing means comprising a substantially tubular-shaped occlusion member having an elastic material portion for engaging an internal surface of said casing;
• a support body arranged in said casing, said support body being connected to said occlusion member;
• a fastening member associated with said occlusion member to provide a radial expansion of said elastic material portion such that the elastic material portion is fastened against said internal surface of said casing, said fastening member shaping a frusto-conical shaped annular portion connected to a central portion internally threaded for coupling to said support body;
• and
• a rolling support structure associated with said motor shaft, said rolling support structure being inserted in a seat of said support body, said rolling support structure comprising a thrust bearing member comprising an internal part and a ring, said internal part being arranged between a shoulder of said motor shaft and said ring, at least a portion of said ring being arranged in said motor shaft groove, said thrust bearing comprising an external part arranged between another ring engaged in the support body and an internal shoulder of the support body.