EXPANSION TURBINE

摘要

An expansion turbine including: a stator, a rotor facing the stator, a short pipe, a shaft rotatably mounted in the short pipe and removably connected to the rotor. The shaft is extractable from the short pipe from the side opposite said rotor. The turbine includes devices removably connecting the rotor to the shaft having a handling portion at a rotor front face. A front static seal, between the rotor and stator, at a radially inner position with respect to an expansion volume between the stator and rotor. The front static seal is mobile between a first position at which a passage is cleared between the stator and the rotor in fluid communication with the expansion volume, and a second position which seals the passage and isolates the expansion volume from a space for access to said handling portion. The front static seal may variable geometry and be an inflatable gasket.

主权项

1. An expansion turbine comprising:
a case; a stator integrated or installed in the case and having stator blades; a rotor mounted in the case, having rotor blades and facing the stator, wherein the rotor is rotatable around a respective rotation axis (X-X); wherein the stator and the rotor delimit between them an expansion volume (V) for a working fluid, provided with said rotor and stator blades; a short pipe integrated or installed on the case; a shaft rotatably mounted in the short pipe and rotating around the rotation axis (X-X); wherein the shaft is removably connected to the rotor and said shaft is extractable from the short pipe from the side opposite said rotor; a device configured to removably connect the rotor to the shaft having a handling portion placed at a front face of the rotor opposite the short pipe and facing at a space configured to allow access to said handling portion; at least one front static seal interposed between the rotor and the stator and placed at a radially inner position with respect to the expansion volume (V); wherein the front static seal and the rotor are movable with respect to each other between a first position at which the front static seal clears a passage in fluid communication with the expansion volume (V) and with the space for access to said handling portion, and a second position at which wherein said front static seal seals said passage and sealingly isolates the expansion volume (V) from the space for access to said handling portion.