| 摘要 |
A spherical axial bearing 6 of the impeller-motor unit 2,3 is located within the pump suction passage 1 passing through the rotor. The air gap between the rotor 3 and the stator poles 20 is part-spherical. A tube 10 defining the suction passage around the bearing pedestal 13 provides a sealing gap 11 with the tube 1a connecting the impeller 2 and rotor 3. Part-spherical sealing gaps 2c and 2e are located between the impeller 2 and the vaned pump stator 26 which directs flow to the axial pump outlet 21. The motor windings (31, Fig. 3) may be arranged radially outwardly of the rotor and contact part (34a) of the pump casing for heat transfer to the pumped liquid. <IMAGE> |
