| 摘要 |
<p>A centrifugal pump for hot media, in particular hot water, has at least one opening provided with an axial face seal (5) for a shaft that extends outside the pump housing (1, 2). The sealing space (9) is separated from the pump housing (1, 2) by a spacer section (8) with little shaft clearance. To avoid sealing failures caused by collected gas, the sealing space (9) has means (12, 20, 21) for generating fluid circulation within the sealing space (9), intensively applied on the axial face of the axial face seal (5), means (12, 18, 21) for reducing the fluid circulation away from the axial face seal (5), and a large, flow-abated receiving space for separated gas, capable of being vented. The gaseous components are thus reliably separated from the axial face seal (5), removed from the fluid circulation and collected in the upper part of the sealing space (9), so that they are extracted of the fluid circulation and can be discharged.</p> |
