Provided is a bearing for a wind turbine, including a first and a second ring arranged radially to each other with one ring rotating relative to the other ring around an axis of rotation. The first ring has a cylindrical ring section and a collar extending radially from the ring section. The collar has an axial support area supporting axial bearing elements, wherein several pretension elements creating compressive stress are fixed to the first ring in the section where the collar extends from the ring section.

A generator assembly includes a rotor carrying a magnetic element, a bearing assembly supporting the rotor for rotation about a rotation axis, a bearing support structure extending circumferentially about the bearing assembly and configured for fixation to a housing, and a sleeve member. The sleeve member is arranged radially between the bearing assembly and the bearing support structure to limit a clearance defined radially between the bearing assembly and the bearing support structure. Integrated drive generators and methods of making generator assemblies are also described.

A generator assembly includes a rotor carrying a magnetic element, a bearing assembly supporting the rotor for rotation about a rotation axis, a bearing support structure extending circumferentially about the bearing assembly and configured for fixation to a housing, and a sleeve member. The sleeve member is arranged radially between the bearing assembly and the bearing support structure to limit a clearance defined radially between the bearing assembly and the bearing support structure. Integrated drive generators and methods of making generator assemblies are also described.

A bearing assembly includes an outer race having an inner surface defining a concave contour and an inner race positioned in the outer race. The inner race has an inner surface defining a bore therethrough and an outer surface defining at least one groove circumscribing the outer surface. A plurality of rolling elements is rollably located in the groove and is in rolling contact with the inner surface of the outer race. A lubricious liner has an inner liner-surface and an exterior liner-surface, the exterior liner-surface being disposed on the inner surface defining the bore. The lubricious liner has a modulus of compression of a magnitude sufficient to allow misalignment of the inner liner-surface relative to the exterior liner-surface in response to a force applied thereto.

A bearing assembly includes an outer race having an inner surface defining a concave contour and an inner race positioned in the outer race. The inner race has an inner surface defining a bore therethrough and an outer surface defining at least one groove circumscribing the outer surface. A plurality of rolling elements is rollably located in the groove and is in rolling contact with the inner surface of the outer race. A lubricious liner has an inner liner-surface and an exterior liner-surface, the exterior liner-surface being disposed on the inner surface defining the bore. The lubricious liner has a modulus of compression of a magnitude sufficient to allow misalignment of the inner liner-surface relative to the exterior liner-surface in response to a force applied thereto.

A bearing assembly includes an outer race having an inner surface defining a concave contour and an inner race positioned in the outer race. The inner race has an inner surface defining a bore therethrough and an outer surface defining at least one groove circumscribing the outer surface. A plurality of rolling elements is rollably located in the groove and is in rolling contact with the inner surface of the outer race. A lubricious liner has an inner liner-surface and an exterior liner-surface, the exterior liner-surface being disposed on the inner surface defining the bore. The lubricious liner has a modulus of compression of a magnitude sufficient to allow misalignment of the inner liner-surface relative to the exterior liner-surface in response to a force applied thereto.

The present invention provides a bearing cage for a rotor bearing of a turbomolecular pump. The bearing cage comprises a plurality of bearing pockets each of which, in use, houses a bearing ball such that the bearing ball operably engages an inner race and an outer race of the rotor bearing. Each bearing pocket of the bearing cage has a primary chamber for housing the bearing ball and each bearing pocket further comprises a sump.

An anti-torque rotor is described for a helicopter, comprising: a mast rotatable about a first axis; a plurality of blades hinged on the mast, extending along respective second axes transversal to said first axis and rotatable about respective said second axes to alter the respective angles of attack; a control element sliding and rotating with respect to the mast, and operatively connected to said blades to cause the rotation of said blades about respective second axes following a translation of said element along the first axis; a control rod sliding axially along first axis with respect to the mast and angularly fixed with respect to the first axis; and a connection element interposed between the control rod and the control element, sliding along the first axis with respect to the mast and integrally with the control rod; the anti-torque rotor further comprises an interface made of an antifriction material interposed between said control rod and said connection element.

A hub bearing unit includes an inner ring having inboard and outboard axial ends and a bearing inner race on an outer surface. An outer ring is disposed about the inner ring and has inboard and outboard axial ends and a bearing outer race on an inner surface. One ring is coupled with a wheel and is rotatable about an axis and the other ring is fixedly coupled with a vehicle. An annular displacement limiter extends radially outwardly from the inner ring and has a radial stop surface spaced axially from the inboard end of the outer ring. The stop surface engages with the outer ring end when one ring displaces axially relative to the other ring. Preferably, the limiter is integrally formed with an annular insert providing a bearing inner race, but may be separately formed and disposed about the insert or the inner ring outer surface.

A hub bearing unit includes an inner ring having inboard and outboard axial ends and a bearing inner race on an outer surface. An outer ring is disposed about the inner ring and has inboard and outboard axial ends and a bearing outer race on an inner surface. One ring is coupled with a wheel and is rotatable about an axis and the other ring is fixedly coupled with a vehicle. An annular displacement limiter extends radially outwardly from the inner ring and has a radial stop surface spaced axially from the inboard end of the outer ring. The stop surface engages with the outer ring end when one ring displaces axially relative to the other ring. Preferably, the limiter is integrally formed with an annular insert providing a bearing inner race, but may be separately formed and disposed about the insert or the inner ring outer surface.