Method for prestressing casingbolts and apparatus for...

Details Method for prestressing casingbolts and apparatus for... Method for prestressing casingbolts and apparatus for...

F - Mech Eng,Light,Heat,Weapons

22

B

F22B 37/24 (2006.01) B23P 19/06 (2006.01) B25B 29/02 (2006.01)

Patent

CA 2091114

A b s t r a c t 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. 2)

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