Abstract: A bearing assembly includes a roller bearing having a bore, and a pin positioned within the bore. The pin has a composite outer profile defined by a first substantially circular segment with a first axis of rotation, and a second substantially circular segment with a second axis of rotation of a different radius. The second axis of rotation is offset from the first axis of rotation.

Abstract: A rotor of a cryogenic dynamoelectric machine comprises a supporting structure with radial slots therein separated by teeth. Coils of a superconducting field winding are placed in the slots and pressed by wedges fitted into axial grooves made in side walls of the slots. An annular shroud embraces the supporting structure. The outer surface of each wedge, facing the shroud, projects beyond the surfaces of the teeth arranged adjacent to the wedge, which also face the shroud. The shroud is provided with a radial interference fit with the outer surfaces of the wedges, with a first radial clearance formed between the shroud and the teeth. Provided between the surface of each wedge, facing the rotor axis and the opposite surfaces of the axial grooves, is a second radial clearance. The magnitude of each of the two clearances is no less than that of the interference fit of the shroud with the outer surfaces of the wedges.

Abstract: Disclosed is a dynamoelectric machine rotor with a superconducting winding, including an inner shaft formed by a superconducting winding supporting structure, an outer shaft formed by a cylindric shell and end extensions fixed to the ends thereof, an electromagnetic shield including an inner cylinder made of a material with high electrical conductivity and an outer cylinder made of a material with high mechanical strength, the electromagnetic shield being fitted on the outer shaft with a radial interference, and a layer of a solid lubricant interposed between the adjoining surfaces of the electromagnetic shield and outer shaft.

Abstract: The disclosed arrangement for supporting stator end windings of an electric machine comprises a rigid inner ring and an outer ring, said rings being made of electrically insulating material. The inner ring is mounted coaxially with the inner bore of the stator core and supports the end portions of a stator bar winding, and the outer ring externally embraces these end portions. Both rings are mounted and secured together along the head portions of the end windings. The inner ring is attached to Z-shaped members arranged adjacent to the end portions and preventing the inner ring from axial displacement relative to the end portions. This is achieved due to the fact that a projection of each Z-shaped member, facing the end surface of the core, is positioned between winding bars at their outlet from core slots, said projection being rigidly connected with one of the brackets movably associated with a clamping plate of the core and attached to the outer ring.

Abstract: A method of assembling a stator core of an electric machine inside the housing thereof comprises securing resilient coupling ribs with their resilient portions to the housing, the resilient portions of the ribs being previously urged against the supporting portion of the ribs up to an elastic deformation state by means of detachable clamping members, assembling core segments on the core supporting portions of the resilient coupling ribs, compressing the core segments, securing the core under compression to the ribs, and removing of the detachable clamping members when the core is secured to the resilient coupling ribs.

Abstract: An electric machine rotor end winding mounting shroud comprising a cylindrical shell having a thinned portion adjacent directly to the rotor body and provided with an inner annular recess at the edge region of the rotor body, whereby this cylindrical shell portion is made flexible, the cylindrical shell being cantilever-like arranged at the end portion of the rotor body.

Abstract: According to the invention, an electrical machine stator comprises a housing, a core, a winding mounted on the core, the upper and lower bars of said winding being connected in pairs in the end winding portion so as to form heads, a supporting member installed in said housing, which supporting member is constructed, in accordance with the invention, as a ring having a cylindrical projection whose height corresponds to the length of the end winding up to the heads, the stator being further provided with brackets whose supporting surfaces are arranged at an angle to the internal surface of the cylindrical projection, there being arranged wedges in the space between the internal surface of the cylindrical projection and the supporting surfaces of the brackets, which wedges are held in place by elastic members. The proposed stator is intended for high-power electrical machines, where it is necessary to ensure reliable fastening of the end winding in different operating conditions.