Steam turbine system with a condensing steam turbine with an efficient barrier steam supply

摘要

Steam turbine system with a condensing steam turbine (1), the shafts labyrinths (12), a blocking purely the direction of the steam feed lines (13 to 15), with which the shafts labyrinths (12) can be blocked, and on the live-steam side a compensating piston (9) with a compensating line (10) into the exhaust-steam connection piece (3) of the condensing steam turbine (1) opens, in the equalization line (10), a pressure holding valve (21) is connected, with which a first predetermined pressure level in the compensating line (10) upstream of the pressure holding valve (21) is adapted to be held, and in front of the pressure holding valve (21) a traffic jam steam discharge line (22) is provided, which in the locking of the feeding of steam in a purely the direction (13 to 15) and opens in the form of a non-return valve (23) with a flow direction in the direction of the blocking of the feeding of steam in a purely the direction (13 to 15) is provided, so that, when in the equalization line (10) upstream of the pressure holding valve (21) the first predetermined pressure level is reached, of the compensating piston (9) via the traffic jam steam discharge line (22) in the blocking steam supply system (13 to 15) steam can be guided and thus the shafts labyrinths (12) can be blocked.