PROCESS FOR REPLACING A BOLTED-ON NOZZLE BLOCK COUPLED TO A NOZZLE CHAMBER IN A STEAM TURBINE

摘要

A process is provided for replacing a first nozzle block coupled to a nozzle chamber with a second nozzle block. The process may comprise removing the first nozzle block from the nozzle chamber. The nozzle chamber may comprise a main body having at least one inlet, at least one passage and at least one exit. The process may further comprise coupling inner and outer retaining rings to the nozzle chamber main body; engaging a second nozzle block with the inner and outer retaining rings; forming a bore so as to extend partly in one of the inner and outer retaining rings and the second nozzle block; and locating an anti-rotation pin in the bore.

主权项

1. A nozzle chamber and nozzle block structure for a steam turbine comprising:
a nozzle chamber comprising a main body having at least one inlet, at least one passage and at least one exit, an inner retaining ring coupled to said main body and an outer retaining ring coupled to said main body, said at least one exit being located between said inner and outer retaining rings; a slide-in nozzle block coupled to said nozzle chamber by engaging grooves formed at least in part by said inner and outer retaining rings; and at least one anti-rotation pin positioned in a bore formed partly in one of the inner and outer retaining rings and said nozzle block.