Electrical machine

Claim 1

In an electrical machine having a housing including a removable cover at the top and radial end walls each provided with a respective central circular opening; a bearing plate mounted in each circular opening; a rotor shaft bearing supported in each bearing plate; a stator core clamped together by end plates, one disposed at each axial end of the core structure; the stator core forming, with the end plates, a self-contained unit disposed in the housing and dismountable as a whole; and a rotor relatively supported in the rotor shaft bearings; the improvement comprising: a. a convex surface constituting the radially outer periphery of each said end plate, said convex surface defining the outer diameter of each end plate; b. a plurality of rigid stator supporting blocks positioned in a bottom zone of said housing and affixed thereto; each stator supporting block having a concave surface centered with respect to said circular openings in said end walls and defining the inner diameter of each stator supporting block; said inner diameter having a length identical to said outer diameter; the convex surfaces of said end plates being in a face-to-face conforming engagement with the concave surfaces of said stator supporting blocks for supporting the entire weight of said stator core; said circular openings and said convex and concave surfaces together define means for centering said rotor and said stator core with respect to one another; c. a plurality of threaded bolt means situated in the vicinity of said supporting blocks for tightening said stator core to said housing.