A CRYOGENIC SUBMERGED FUEL PUMP

The present disclosure concerns a submerged fuel pump for pumping liquidised fluids, in particular a cryogenic submerged fuel pump for pumping liquidised fuel, such as liquid natural gas (LNG), hydrogen, methanol, ethane, liquefied petroleum gas (LPG) or the like, said pump comprising a housing (1) having a lower fluid inlet (3') and an upper fluid outlet (3'') and accommodating a vertically oriented pump shaft (4); a permanent magnet electrical motor (2) having a rotor with a hollow motor drive shaft (22) and a stator (24) around said rotor; at least one impeller (5), which is mounted to the pump shaft (4), for moving cryogenic fluid from an inlet to an outlet; wherein the pump shaft (4) is concentrically mounted in the hollow motor drive shaft (22); and wherein the mounting of the pump shaft (4) and the motor drive shaft (22) is a collet clamp connection for interlocking the motor drive shaft (22) and the pump shafts (4) at the top ends of said shafts.