Device for pre-tautening of the annular stator core...

Details Device for pre-tautening of the annular stator core... Device for pre-tautening of the annular stator core...

H - Electricity

02

K

26/113

H02K 15/00 (2006.01) H02K 1/18 (2006.01)

Patent

CA 1329471

ABSTRACT This invention refers to a device for the pretautening of the stator core laminations (20) of a large electric generator. A suitable number of anchoring devices (40) according to the invention is positioned between the shell (10) and the stator core laminations (20), evenly dis- tributed in height and around the circumference. Each anchoring device (40) by means of which said pre- tautening is achieved, has a baseplate (41) secured to the shell (10) for example by welding, and a bracket (51) equipped with tong-like arms (52) by means of which it is able to grip the fins (32) made on tension rod keys (30) having a dovetail-shaped rib (31) capable of being inserted into a corresponding seat (21) formed in the extrados of the stator core laminations (20). Pre-tautening of the stator pack is achieved by exer- cising centrifugal traction on the brackets (51) and securing them by means of screws (57) arranged between the baseplate (41) and the bracket (51) (figure 3).

559725

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