| 摘要 |
In a pump unit for liquid pumps, comprising a plastic impeller with a metallic hub and a mechanical seal, the counter-ring 4 is arranged in a recess 7 of the plastic impeller 2 in such a way that it is in thermally conducting contact by its rear face with the radial limb 10 of the hub 3. Heat dissipation to the shaft 8, which prevents melting of the plastic impeller 2, is thereby guaranteed. …<IMAGE>… |
