Rolls-royce Corporation

Rolls-royce Deutschland Ltd & Co. Kg

Daren Ashmore

James Alan Plant

Mark Spruce

Paul Gorenz

Michael Nique

Christopher Campbell

Frank Wagner

Graham Paul Morton

Steven Opacic

James Plant

A planetary gearing includes a sun gear rotating about a rotation axis and driven by a sun shaft; planet gears driven by the sun gear, each planet gear having an axially forward face side and an axially rearward face side; a ring gear engaging the planet gears; and planet slide bearing pins, wherein respectively one planet slide bearing pin is arranged inside a planet gear forming a lubricated journal bearing. At an axially forward face side and/or axially rearward face side, each planet gear forms a recess that extends inside the planet gear starting from the face side, and the planet slide bearing pins respectively form one crowning at their abutment surface such that their outer diameter decreases from a maximum outer diameter to at least an axial end of the abutment surface and has a minimum at the axial end.

Planetary gearing

A planetary gearing includes a sun gear rotating about a rotation axis and driven by a sun shaft; planet gears driven by the sun gear; a ring gear engaging the planet gears; and a plurality of planet pins that respectively include an outer-side abutment surface having an axially forward end and an axially rearward end. Respectively, one planet pin is arranged inside a planet gear, and the planet pin and the planet gear form a lubricated journal bearing. At an axially forward face side and/or axially rearward face side, each planet gear forms a recess that extends inside the planet gear starting from the face side. The planet pins respectively form a crowning at their abutment surface such that their outer diameter decreases from a maximum outer diameter towards at least one axial end of the abutment surface, and has a minimum at the axial end.

Planetary gearing and planet pin for a planetary gearing

A componentfor a bearing, the componentcomprising a bearing surfacewherein the bearing surfaceis formed so as to be tapered at rest, thereby offsetting deformation of the bearing during an operational condition which generates an induced angle in the bearing surfaceor an opposing surface of the bearing. A method of manufacturing a bearing is also provided. The method comprises: determining an induced angle of a componentof the bearing caused by deformation of the bearing during an operational condition: and providing a surfaceof the componentor an opposing component with a taper at rest so as to offset the induced angle generated during the operational condition.

Bearing raceway and a method of manufacturing a bearing

A bearing cage for a rolling element bearing assembly, the bearing cage including a cage body having an inner surface defining a bore coaxially aligned with the principal rotational axis of the bearing cage; a plurality of pockets, each pocket being suitable for housing a rolling element of the rolling element bearing assembly, the pockets being arranged sequentially around the cage body with respect to the principal rotational axis of the bearing cage; and a skirt projecting from the cage body in the axial direction; characterized by a flow deflector projecting from the skirt in the radial direction.

Bearing cage deflector

A bearing cage for a rolling element bearing assembly includes an outer surface, an inner surface defining a bore, and a plurality of pockets. Each pocket of the plurality of pockets is configured to house a rolling element of the rolling element bearing assembly. The plurality of pockets are arranged sequentially around the bearing cage with respect to an axis of the bore. A guide portion of the inner surface is tapered in an axial direction of the bore such that dimensions of the bore increase towards a central region of the bore, and the bearing cage further includes a plurality of conduits providing fluidic communication between the inner surface of the bearing cage and the outer surface of the bearing cage.

Tapered oil feed bearing cage

A race for a rolling-element bearing is characterized in that the race comprises at least one circumferentially-extending region having a reduced stiffness compared with the remainder of the race. The or each circumferentially-extending region may be thinner than the remainder of the race, and may further comprise a hole or a slot. In a particular preferred embodiment there are two such circumferentially-extending regions, each extending around an arc of approximately 60 degrees in the circumferential direction.

Growing community of inventors

Nottingham, United Kingdom

Daren Ashmore