The turbine has a lining (6) including a circle round break-through and extending gaplessly over an entire cross-section area of a housing by retaining of the break-through. A cylindrical ring (5) is inserted into the break-through, and has external side that is gaplessly connected with the lining. An axial length of the ring is equally large as a thickness of the lining. An axial impeller is arranged in a plane of the lining and within the ring. Length of rotor blades (2) is selected such that the ring encloses the impeller closely.
