GB341666A - Improvements in and relating to rotors for dynamo-electric machines - Google Patents

Abstract

341,666. Dynamo-electric machines. BRITISH THOMSON - HOUSTON CO., Ltd., Crown House, Aldwych, London.- (Assignees of Reist, H. G. ; 1166, Avon Road, Schenectady, New York, U.S.A.) Dec. 13, 1929, No. 38295. Convention date, Dec. 22, 1928. [Class 35.] Field magnets ; mounting and dismounting rotors. -A rotor comprises separable sectors adapted for attaching polepieces thereto, each composed of a group of plates interleaved with plates of the adjacent sector to form a joint therewith, a divided hub member, and groups of sector-shaped plates extending to the periphery of the sectors and secured to the sectors and to flanges on the respective parts of their hub member. The sector plates and the sector-shaped plates have notches which are aligned to form grooves for securing the polepieces. Tn the form shown, the sectors 10, 11 are each formed of groups of notched plates 12 which are interleaved with those of other groups 13 so as to provide dovetailed grooves 16 in which the polepieces 18 are secured by keys 19. The groups of plates are secured by bolts 24 and looking plates 26. The sector 10 ;is secured to the hub portion 28 by groups of plates 31 to which they are bolted and which are secured to a flange 32 on the hub 28 by bolts 33 and locking plates 34. The sector 11 is secured to the hub portion 29 in a similar manner by plates 36. The plates 31, 36 extend to the outer peripheries of the sectors and have dovetailed notches in alignment with those on the plates 12, 13. The rotor may be separated into two parts by withdrawing the bolts 24a, 25a, 30.