| 摘要 |
In centrifugal pumps hitherto known with impeller wheel overmounted on the drive shaft, the drive shaft is supported in the bearing housing by means of two radial bearings and one axial bearing. These known bearings are not only of relatively complex and costly design, their service life is also relatively short, since when the centrifugal pump is in operation they are exposed to heavy reversed loading. The running characteristics of the impeller wheel and the associated efficiency of the pump are also adversely affected by the premature occurrence of undesirable large degrees of bearing play. According to the invention, however, these disadvantages are overcome in a simple manner in that two radial bearings (9, 10) and two axial bearings (11, 12) are provided for supporting the drive shaft (1) in the bearing housing (8). <IMAGE> |
