IMPROVED TURBINE FOR GAS/STEAM EXPANSION Russian patent published in 2014 - IPC F01D25/16 F01D25/28 

FIELD: machine building.

SUBSTANCE: turbine for gas and steam expansion comprises a case with a spiral made so that to provide for the passage of liquid medium from the inlet to the outlet channel through stator and rotor groups, an external pipe and can comprise an end shield extending from the said spiral to the turbine shaft axis in radial direction. The external pipe is attached to the front side of the shield or the spiral and serves as a support for the turbine shaft due to a supporting element set between them. The turbine shaft is fitted by a head against which the rotor group rests, and the turbine shaft together with the rotor group are made with the possibility of axial travelling between the operating position and the retracted position. In the operating position the shaft head is distanced from the inner end of the external pipe and is turned to the stator group, and in the retracted position the shaft head or the part of the rotor group rests against the inner end of the external pipe by means of a front seal installed between them.

EFFECT: invention allows for the replacement of a turbine shaft support along with hermetical isolation of the inner space of the turbine from the environment during the replacement of such a support.

10 cl, 3 dwg