Bearing shell for heavily loaded bearings with a rolled strip interference or force fit lining
AssigneeCentre Stephanois de Recherches Mecaniques Hydromecanique et Frottement
InventorsDaniel Tourneux, Rene Mariatte, Bernard Dajoux
Life of this patent
Estimating the term…
Abstract
A bearing shell for heavily loaded bearings with a rolled strip interfere or force fit lining comprises a generally annular body with an axial bore fitted with a lining in which a shaft turns. The lining comprises a 2 mm thick rectangle of rolled steel strip at least the bearing surface of which has been surface hardened to a depth of approximately 0.5 mm by nitriding or by carburizing and quenching. The ends of the rolled strip bear on each other. The strip is an interference or force fit in the bore of the body and has an excess length relative to the developed length of a neutral fiber of an unstressed lining between 0.3 and 9%.
Claims12
Bearing shell for heavily loaded bearings operating in an abrasive environment comprising a generally annular bearing body having an axial bore, a rolled cylindrical lining of rectangular strip steel having an interference or force fit with the bore, said lining having a bearing surface for contact with a rotating shaft, said bearing surface being surface hardened to a relative depth, defined as the depth divided by the thickness of the strip, between 0.23 and 0.27, said strip having an excess circumferential length relative to the developed circumferential length of the neutral fiber of an unstressed lining in the bore between 0.3 and 9%.
Bearing shell for heavily loaded bearings operating in an abrasive environment comprising a generally annular bearing body having an axial bore, a rolled cylindrical lining of rectangular strip steel having an interference or force fit with the bore, said lining having a bearing surface for contact with a rotating shaft, said bearing surface being surface hardened to a relative depth, defined as the depth divided by the thickness of the strip, between 0.23 and 0.27, said strip having an excess circumferential length relative to the developed circumferential length of the neutral fiber of an unstressed lining as a function of the diameter of the bore as follows:
- ______________________________________ Bore .phi. (mm) Relative excess length (%) ______________________________________ 10-25 3-9 25-35 2.2-4.3 35-45 1.7-2.9 55-100 1.1-2.3 100-140 0.7-1.5 140-260 0.4-1.0 260 and above 0.3-0.7. ______________________________________
Dependencies are inferred from the claim text.