Steam turbine i.e. high pressure steam turbine, has piston seal arranged between rotor and stator, and release groove arranged at rotor, arranged in region of thrust balance piston and running in circumferential direction of rotor

摘要

The turbine has an intake port (5) for fresh air stream (11) that flows through a blade channel (1') of the turbine. A piston seal (7) is arranged between a rotor (2) and a stator (4). A release groove (8) is arranged at the rotor and is arranged in a region of a thrust balance piston (6). The release groove runs in a circumferential direction of the rotor. The release groove is arranged with respect to a blade row (12) in the blade channel. The groove has a cover that is formed by a part of the stator and is arranged in a region of the piston seal.