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Means for assembling ferromagnetic stators of rotating electric machines to housings made of lightweight alloys where high temperature operation causes loss of interference fit between stator and housing. Keys are equally spaced about the housing and are spring loaded with Belleville-type springs to

Means for assembling ferromagnetic stators of rotating electric machines to housings made of lightweight alloys where high temperature operation causes loss of interference fit between stator and housing. Keys are equally spaced about the housing and are spring loaded with Belleville-type springs to maintain adequate centering forces on the stator at high temperature.

대표청구항 ▼

In a rotating electrical machine having a stator of generally cylindrical form and a housing surrounding said stator in close fitting relationship at lower temperatures, said housing and said stator being subject to thermal expansion in different amounts resulting in loss of close fit at higher temp

In a rotating electrical machine having a stator of generally cylindrical form and a housing surrounding said stator in close fitting relationship at lower temperatures, said housing and said stator being subject to thermal expansion in different amounts resulting in loss of close fit at higher temperature; means for securing said stator against relative movement in said housing and for maintaining said stator centered therein, comprising a keyway formed in the outer periphery of said stator; a threaded aperture in said housing aligned with said keyway; a key in said aperture engaging said keyway, said key being so dimensioned as to maintain shear contact with the walls of said aperture and said keyway throughout the range of thermal expansion to which said housing and said stator are subject; spring means in said aperture and bearing on said key to exert a radially directed thrust on said key and said stator when loading forces are applied to said key; and a loading screw threaded into said aperture and bearing on said spring means to exert a loading force on said spring means according to the distance said loading screw is threaded into said aperture, and to the degree necessary for maintaining the stator centered within the housing and for maintaining the shear contact even after the spring loading force is relaxed by the thermal expansion of the housing and stator in different amounts.