| 摘要 |
<p>The pump comprises a stator (112) and a rotor comprising a impeller in which a fluid duct (114) passes. An axial balancing device arranged on this wheel (111) comprises a rear balancing chamber (118) and a passage (120) arranged between the wheel (111) and the stator (112), enabling evacuation of fluid from the fluid duct (114) to the balancing chamber (118). The pressure of fluid in the balancing chamber (118) compensates the pressures exerted by the fluid on the rest of the rotor (111) allowing axial balancing of the rotor. The passage (120) comprises an upstream nozzle (140) and a downstream nozzle (160), as well as an intermediate annular chamber (150), arranged between walls (151, 152; 141, 142; 161, 162) of the wheel (111) and of the stator (112), the intermediate chamber being arranged downstream of the upstream nozzle (140) and upstream of the downstream nozzle (160).</p> |
