| 摘要 |
Generator shaft sealing arrangement comprising at least two seal rings (2, 3) with a sealing oil channel (8) between, wherein the seal rings (2, 3) are radially enclosing a rotating shaft (1) with a clearance (6, 7), and wherein sealing oil (34) is pumped through the sealing oil channel (8) in a radial direction towards the shaft (1) and is subsequently flowing through said clearance (6, 7) in two opposite axial directions and is collected on an first side (4) as well as on a second side (5) of the shaft sealing arrangement and at least partially reintroduced into the sealing oil supply system. The generator shaft sealing arrangement shows a very low hydrogen consumption and a high hydrogen purity for a hydrogen cooled turbo generator thereby minimising oil degassing expense in that on at least one side (4, 5) the corresponding seal ring (2, 3) is provided with a sealing oil return channel (37, 38), through which at least a fraction of the sealing oil flowing in the corresponding clearance (6, 7) exits said clearance (6, 7) in a radial direction, and is at least partially collected and reintroduced into the sealing oil supply system (16, 18).
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