Method for minimizing the gap between a rotor and a housing

Abstract

A method for minimizing the gap between a rotor, particularly a rotor vane, and a housing, particularly a housing of a turbine, wherein the gap between rotor and housing is adjustable is provided. The method includes displacing rotor and housing with respect to one another, to provide a simple way of minimizing the gap between rotor and housing. An output signal from a structure-borne sound monitoring system assigned to the rotor and/or housing is taken as a metric for the size of the gap and thus for setting a minimum gap.

1 .- 10 . (canceled) 
     
     
         11 . A method for minimizing the gap between a rotor and a housing,
 wherein the gap between rotor and housing is adjusted, by displacement of the rotor and the housing in relation to each other,   wherein an output signal of a structure-borne sound monitoring system, which is associated with the rotor and/or the housing, is used as a measure for the size of the gap and consequently for the setting of a minimum gap, and   wherein the structure-borne sound monitoring system is a component part of a foreign-body detection system of a turbine.   
     
     
         12 . The method as claimed in  claim 11 ,
 in which the rotor is displaced in an axial direction in relation to the housing for adjusting the size of the gap.   
     
     
         13 . The method as claimed in  claim 11 ,
 wherein the rotor is displaced just until there is no longer a contact between rotor and housing which generates output signals.   
     
     
         14 . A turbine comprising a rotor and a housing, comprising
 an adjusting device wherein the gap between rotor and housing can be adjusted by means of the adjusting device, by displacement of rotor and housing in relation to each other,   a structure-borne sound monitoring system associated with the rotor and/or the housing and on the output side connected to the adjusting device,   wherein the structure-borne sound monitoring system is a component part of a foreign-body detection system of a turbine.   
     
     
         15 . The turbine as claimed in  claim 14 ,
 in which the rotor can be displaced in an axial direction in relation to the housing for adjusting the size of the gap.   
     
     
         16 . The turbine as claimed in  claim 14 ,
 in which the rotor is at least partially abradable.   
     
     
         17 . A power plant with a turbine as claimed in  claim 14 .