Output shaft device for a water pump under high pressure and temperature, particularly for a feed pump of a steam-powered electric power station

摘要

A mechanical sealing gasket includes a revolving bead 8 bearing against a non-revolving bead 9. It is cooled by a circuit of pressurised water including an exchanger EB, PS, EH fed through an inlet 22 by the low-pressure water of a general cooling circuit outside the pump. This exchanger is integrated into a water box which also includes a thermal barrier which is located between this gasket and the pump body 1 and which includes two walls 30, 40 cooled in series by the low-pressure water leaving this exchanger. Application to steam-powered thermal electric power stations. IMAGE