SUBMERGED MOTOR PUMP

摘要

A submerged motor pump (4) has an auxiliary bearing assembly (19, 20) for supporting a rotatable main shaft (9) when the submerged motor pump (4) is not in an operating condition or operates in a transient condition. The submerged motor pump includes a pump casing (6), at least one impeller (12), a motor (10, 11), and a thrust balancing mechanism (15) for balancing thrust forces. The submerged motor pump further includes hydrostatic bearings (16, 17, 18) for supporting the main shaft (9) at axially spaced locations by a pressurized fluid pumped by the submerged motor pump (4). The auxiliary bearing assembly (19, 20) has tapered support surfaces (FL, FU) for supporting the main shaft (9) at the axially spaced locations.