| 摘要 |
The pump has a motor comprising a rotor (16) in a rotor cavity. The rotor cavity is formed by a tube that is placed in an air-gap between the rotor and a stator. A hollow shaft (20) is rotatably driven by the rotor. The hollow shaft is rotated with respect to the tube in a set of front and rear guidance bearings (36, 38). The hollow shaft and the rotor cavity form fluid i.e. water, passage in which the tube includes a relief or gadroons (212). The relief is adapted to cooperate with the guidance bearings for limiting displacement of the guidance bearings with respect to the tube. |
