Abstract: A shaft arrangement includes two shaft ends positioned in end-to-end abutting relation and an outer sleeve surrounding the abutting ends of the two shaft ends. The outer sleeve has through-channels for introducing pressure medium in the interface between the shaft ends and the outer sleeve to create a sleeve expanding effect during mounting and dismounting, and a radial grip acting between the sleeve and the two shaft ends, when the pressure medium has been drained through the through-channels, with the radial grip effecting a radial as well as an axial joining of the shaft ends and the outer sleeve. Each shaft end adjacent its abutting end face is equipped with a grip arrangement that is engaged by a thrust member. The thrust member bridges the abutting end faces and engages the grip arrangement inside the outer sleeve to inhibit the two shaft ends from being axially pulled apart even upon application of a large axial force.

Abstract: A press fit joint shafting connection for hollow cylindrical steel shafts has shaft end faces provided with eccentrically arranged axial recesses wider than the main shaft bores. An annular toughened steel locking insert having an eccentrically arranged through bore is retained in the space formed by the eccentrically arranged bores when the shaft ends meet. The degree of eccentricity of the bore in the locking insert corresponds to that of the eccentrically arranged shaft recesses while the locking insert bore diameter corresponds to the diameter of the main shaft bores. The inner bores with free lumen are in alignment in a mounted state. A corresponding shafting method is also described.

Abstract: A method for prestressing bolts arranged in places where lateral accessibility is reduced, particularly casing bolts for turbines, comprises the mounting of a bridge element (41) on the end faces of the threaded ends of support bolts (21, 23) positioned at either side of the bolt (22) selected for prestressing, and prestressing of the bolt (22) by means of hydraulic stressing means (42, 45) arranged at the bridge element (41). Also disclosed is an apparatus for carrying out the method according to the invention, the apparatus comprising a bridge element (41), a pulling sleeve (42) with hydraulic drive (45) arranged on the bridge element, and means for generation of hydraulic pressure. (FIG.

Abstract: A method for prestressing bolts arranged in places where lateral accessibility is reduced, particularly casing bolts for turbines, comprises the mounting of a bridge element (41) on the end faces of the threaded ends of support bolts (21, 23) positioned at either side of the bolt (22) selected for prestressing, and prestressing of the bolt (22) by means of hydraulic stressing means (42, 45) arranged at the bridge element (41). Also disclosed is an apparatus for carrying out the method according to the invention, the apparatus comprising a bridge element (41), a pulling sleeve (42) with hydraulic drive (45) arranged on the bridge element, and means for generation of hydraulic pressure.