PUMP ARRANGEMENT, A FUEL DELIVERY SYSTEM AND A LIQUID COOLING SYSTEM FOR AN INTERNAL COMBUSTION ENGINE INCORPORATING SUCH A PUMP AND A VEHICLE COMPRISING SUCH A FUEL DELIVERY SYSTEM AND LIQUID COOLING SYSTEM

摘要

A pump arrangement (10) is disclosed having a housing (12), a first pumping chamber (14) within the housing, a drive shaft (18) carried by the housing, and first pumping means (16) arranged for rotation within the first pumping chamber (14). The first pumping means is driven by the drive shaft. A second pumping chamber (22) accommodating second pumping means (26) is separated from the first pumping chamber by the housing (12) such that the housing forms a common separation wall (24). To provide a compact arrangement in which the first and second pumping chambers are reliably sealed from each other, the second pumping means is driven by the drive shaft (18) via a magnetic coupling (32). Thus, the coupling comprises a driver rotor (34) connected to the drive shaft (18) and a driven rotor (36) carried by the housing (12). The driver rotor (34) and the driven rotor (36) are separated by a separation wall assembly (48) serving as a static seal to hermetically seal the second pumping chamber from the drive shaft.