| 摘要 |
<p>The invention relates to a pump that includes: a chamber (4) for heat-transport fluid flow; a pump wheel (10) which is placed entirely in the flow chamber (4) and which comprises a hub (40); a shaft (14) for rotating the pump wheel (10), having an axial end section (12) rigidly connected to the pump wheel (10) and fitted in the hub (40) of the pump wheel (10); a motor for rotating the shaft (14) about the axis thereof; and means for causing a coolant for cooling the drive shaft (14) to flow, at a temperature lower than that of the heat-transport fluid, along the drive shaft (14). Said pump also includes a shield (120) for protecting the pump wheel (10) against a coolant leak along an outer peripheral surface (48) of the hub (40) of said pump wheel (10), said protective shield (120) being attached to the pump wheel (10).</p> |
