Turbine

摘要

A turbine includes a stator (10) and a rotor (20); a plurality of turbine stages (30) through which a flow path of an operating fluid extends; an axial thrust balancing piston (40) arranged at the rotor and a first piston chamber (41) connected to one of the turbine stages (30.1) so that the operating fluid can be conveyed into the first piston chamber with a first fluid pressure, and a second piston chamber (42) has a counterpressure so that an axial thrust opposed to a flow direction of the operating fluid can be exerted on the rotor; and a pressure control device (60) connected to the second piston chamber. The pressure control device constructed to vary the counterpressure by controlled removal of fluid from the second piston chamber so that the axial thrust of the axial thrust balancing piston can be varied.

主权项

1. A turbine comprising:
a stator (10); a rotor (20) rotatably bearing-supported in said stator (10); a plurality of turbine stages (30) formed by said rotor (20) and said stator (10) and arranged successively along a longitudinal direction (LR) of said turbine and through which a flow path of an operating fluid extends for driving said rotor (20) in rotation; an axial thrust balancing piston (40) arranged at said rotor (20), said axial thrust balancing piston (40) comprising on a first axial piston side a first piston chamber (41) connected to one of said turbine stages (30.1) via a first fluid line (51) so that the operating fluid can be conveyed from one turbine stage (30.1) into said first piston chamber (41) with a first fluid pressure and, on a second axial piston side remote of the first piston side, a second piston chamber (42) having a counterpressure that is lower than the first fluid pressure so that an axial thrust opposed to a flow direction of the operating fluid through said turbine stages (30) can be exerted on said rotor (20) by said axial thrust balancing piston (40); and a pressure control device (60) connected to said second piston chamber (42) of said axial thrust balancing piston (40) for varying the counterpressure by controlled removal of fluid from said second piston chamber (42).