Back to results
US 5,123,241 AGranted
System for deforming a turbine stator housing
AssigneeSociete Nationale d'Etude et de Construction de Moteurs d'Aviation "S.N.E.C.M.A."
InventorDan Lotan
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeSociete Nationale d'Etude et de Construction de Moteurs d'Aviation "S.N.E.C.M.A."
InventorDan Lotan
Estimating the term…
A system for deforming a turbine stator housing is disclosed which maintains a substantially uniform radial clearance between a stator and a rotor under all operating conditions of a turbojet engine. The system deforms the turbine stator housing so that its longitudinal axis is substantially conincident with the longitudinal axis of the rotor, particularly under transient conditions. Such deformation results in the attainment of equal radial clearance between the rotor and the stator around the periphery of the rotor. The deformation is achieved by heating or cooling a selected portion of the stator housing such that the temperature distribution, measured around a periphery of the stator housing, is non-uniform, such non-uniform temperature distribution causing the stator to radially deform such that is longitudinal axis is coincident with that of the rotor.
Apparatus for maintaining a substantially uniform radial clearance between a stator housing and a rotor of a turbine as a longitudinal axis of the rotor undergoes radial deformation comprising means to change the temperature of a selected portion on one side of the stator housing such that the temperature of the selected portion is different from the temperature of a generally opposite side of the stator housing, whereby the temperature distribution measured around a periphery of the stator housing is non-uniform, such non-uniform temperature distribution causing the stator to radially deform such that a longitudinal axis of the stator housing is generally coincident with the longitudinal axis of the rotor.
Dependencies are inferred from the claim text.