초록 ▼

The casings of gas turbine engines are subject to loadings which distort the casing and adversely affect the running clearance between rotating and static components contained within the casings. The invention provides an engine having inner and outer housings the inner housing containing one of the

The casings of gas turbine engines are subject to loadings which distort the casing and adversely affect the running clearance between rotating and static components contained within the casings. The invention provides an engine having inner and outer housings the inner housing containing one of the engine compressors. The inner casing is mounted on a load transmitting and isolating structure which allows thrust and torque to be transmitted to the outer casing, but isolates the inner casing from distortions of the outer casing. The load transmitting and isolating structure includes a torque reaction and mounting means at the upstream end of the inner casing, a mounting means and a thrust reacting means mounted between the ends of the inner casing. The mounting means are adjacent the bearings of the rotor shaft of the compressor and are not affected to any appreciable extent by outer casing distortion. The thrust reacting means are mounted in a horizontal plane and are not affected by bending of the outer casing in a vertical plane.

대표청구항 ▼

A gas turbine engine having an outer casing, and an inner casing containing at least in part an arrangement of stator vanes and rotor blades, the stator vanes being attached to the inner casing, and the rotor blades attached to a shaft mounted in bearings, the inner casing being mounted within the o

A gas turbine engine having an outer casing, and an inner casing containing at least in part an arrangement of stator vanes and rotor blades, the stator vanes being attached to the inner casing, and the rotor blades attached to a shaft mounted in bearings, the inner casing being mounted within the outer casing by means of load transmitting and isolating structure including a mounting means adjacent each end of the inner casing, the mounting means locating the inner and outer casings concentrically with one another and allowing relative axial movement with one another, said mounting means comprising torque reacting means located between the inner and outer casings to allow torque to be transmitted to the outer casing, and thrust reacting means positioned between the ends of the inner casing to allow thrust induced on the inner casing to be transmitted to the outer casing with the load-transmitting and isolating structure minimizing the transmission of loads from the outer casing to the inner casing, said mounting means at at least one end of the inner casing comprising a cylindrical sleeve attached to the outer casing and a cylindrical surface of the inner casing engaging with the sleeve of the outer casing, allowing relative axial movement between the inner and outer casings.