Turbine including seal air valve system

摘要

A turbine includes a rotor, a fluid bearing for rotatably supporting the rotor, an air supply conduit system for supplying air towards the fluid bearing, a discharge conduit system for discharging a portion of the supplied air and a control system arranged to change an amount of air discharging through the discharge conduit system based on a running condition of the turbine.

主权项

1. A turbine, comprising:
a rotor; a stator portion; a fluid bearing for rotatably supporting the rotor; at least one labyrinth seal configured to seal an annular gap between the rotor and the stator portion; an air supply conduit system for supplying a stream of air through the annular gap towards the fluid bearing from conduits that feed into the annular gap at first and second positions on opposed sides of the at least one labyrinth seal; a discharge conduit system for discharging a portion of air supplied by the air supply conduit system from the annular gap between the first and second positions and from the annular gap downstream of both the first and second positions and upstream of the fluid bearing; and a control system arranged to change an amount of air discharging through the discharge conduit system based on a running condition of the turbine.