Patent ID: 6566774
Filing Date: 2003-05-20
Classification: F16C,H02K

Abstract:
An electrical submersible pump motor having a rotor mounted to a rotatable shaft and located within a stationary stator, a bearing assembly for radially supporting the shaft comprising:a fixed annular bearing carrier positioned within the stator; an anti-rotation member on an outer diameter of the bearing carrier that frictionally grips the stator to prevent rotation of the bearing carrier; a bearing sleeve secured to the shaft for rotation therewith, the bearing sleeve being disposed within an inner diameter of the bearing carrier; an axial passage extending through the shaft for circulating fluid, the axial passage having at least one lateral outlet that leads to an inner diameter of the bearing sleeve; a communication passage extending from an inner diameter of the bearing sleeve to an outer diameter of the bearing sleeve; a fixed annular sleeve insert located between the bearing sleeve and the bearing carrier, defining a gap between the bearing sleeve and the sleeve insert that receives fluid from the communication passage in the bearing sleeve, the sleeve insert having ends that face in opposite axial directions; a pair of seals that seal between the sleeve insert and the bearing carrier, defining an annular fluid chamber, each of the seals being located in sealing engagement with one of the ends and the inner diameter of the bearing carrier; and a metering passage extending through the sleeve insert for allowing communication of lubricant between the gap and the fluid chamber.