Method of minimizing the gap between a rotating turbine blade and a casing of a turbine, a turbine, and a method of determining the wear behavior of a wheel of a rotor
AssigneeSiemens Aktiengesellschaft
InventorMirko Milazar
Life of this patent
Estimating the term…
Abstract
Method of minimizing the gap between a wheel and a casing of a turbine, a turbine, and a method of determining the wear behavior of a wheel of a rotor. To minimize the gap between a wheel and a casing in a turbine, optical methods are also often used in order to minimize the gap. However, this is very expensive. The method according to the invention proposes that the wheel and the casing (be part of an electric circuit, so that an electrical parameter, such as resistance for example, can be measured, the value of which shows whether a contact is present.
Claims13
A method of minimizing a gap between a rotating turbine blade and a turbine casing, comprising:
- adjusting the gap by displacing the rotating turbine blade and the turbine casing;
- forming an electric circuit between the rotating turbine blade and the turbine casing;
- measuring the gap via an electrical resistance in the electric circuit,
- wherein the electric resistance indicates that there is an electrical contact between the rotating turbine blade and the turbine casing;
- and
- setting a minimum gap based on the measured electrical resistance.
A gas turbine, comprising:
- a rotating turbine blade;
- a turbine casing adapted to make electrical contact with the blade;
- an electric circuit comprising the rotating turbine blade and the turbine casing;
- and
- an amount of electric resistance in the electric circuit that indicates of the size of a gap between the rotating turbine blade and the turbine casing.
A method of determining wear behavior in the axial direction of a turbine blade, comprising:
- creating an electric circuit between the turbine blade and a turbine casing;
- measuring the size of the gap via an electrical resistance in the electric circuit, the electric resistance indicates that there is an electrical contact between the turbine blade and the turbine casing;
- creating a measuring curve of an electric resistance plotted as a function of an axial displacement;
- plotting a total distance of the axial displacement as a function of time;
- and
- determining a certain axial displacement corresponding to a certain wear of the rotating turbine blade.
Dependencies are inferred from the claim text.