Patent ID: 8864461
Filing Date: 2014-10-21
Classification: F01D,F02C,F05D

Abstract:
1. A turbine structure for the expansion of gas and vapor, comprising: a body or casing with a peripheral work fluid transit volute from an entrance to an exit passage; at least a first stator; a turbine shaft rotating around an axis and carrying at least a first rotor working together downstream of the first stator; an external tube member jutting out frontally from said body or casing and coaxial to the rotating turbine shaft, wherein between the tube member and the turbine shaft a supporting unit is positioned axially and is extractable enbloc from said external tube, while the shaft remains still, wherein said supporting unit comprises an internal sleeve concentric to the turbine shaft and carrying inside said supporting unit some bearings and a seal operating on said shaft, and in which said supporting unit is held axially in said external tube, said supporting unit and said internal sleeve connecting concentrically through two peripheral reciprocal support zones, with limited axial extension, provided between the internal surfaces of the tube member and outside of the sleeve, and through a conical, or spherical, supporting zone between said tube and said sleeve near their ends facing towards the rotors of the turbine, said radial and conical, or spherical, supports forming an isostatic supporting system with constraints, from the conical or spherical support zone side in combination with a contiguous radial support equivalent to a hinge and, on the distant radial support side, equivalent to a carriage.