Patent ID: 6012898
Filing Date: 2000-01-11
Classification: F04D,F16C

Abstract:
A submerged motor pump comprising:a pump casing;at least one impeller provided in said pump casing;a motor;a main shaft which is rotated by said motor and supports said impeller;a thrust balancing mechanism for balancing thrust forces;hydrostatic bearings for supporting said main shaft at axially spaced locations by a pressurized fluid pumped by said submerged motor pump; andan auxiliary bearing assembly for supporting said main shaft when the submerged motor pump is not in a normal operating condition or is in a transient condition, said auxiliary bearing assembly having support surfaces for supporting said main shaft at axially spaced locations, and each of said support surfaces comprising tapered surfaces which fit against each other when the submerged motor pump is not in said normal operating condition or is in said transient condition, and are held out of contact with each other when the submerged motor pump is in said normal operating condition.