Plain bearing and materials for making such bearings

摘要

928,433. Bearing fabrics; impregnated bearing surfaces. GLACIER METAL CO. Ltd. July 28, 1961 [Aug. 23, 1960], No. 29145/60. Classes 74 (2) and 140. [Also in Groups XXVI and XXXIV] A fabric for bonding to a bearing contains polytetrafluoroethylene and copper alloy, with or without lead. The yarns of the fabric may be wholly of one material or composite yarns of P.T.F.E. and copper alloy, e.g. bronze; P.T.F.E. and lead; bronze and lead; of all three or of lead-coated yarns. The wholly P.T.F.E. yarns may be mono- or multi-filament of from 200 to 2400 denier, the wholly metallic yarns may be mono- or multi-filament of from 0.001 to 0.030 inch diameter, the composite fabric may be (by weight) P.T.F.E. 30 to 80% and bronze 20 to 70%, or P.T.F.E. 10 to 45%, bronze 5 to 35% and lead 45 to 85%. Fig. 1 shows a fabric having alternate warps 1 of lead 0.015 inch diameter and 2 of 95/5 tin bronze 0.008 inch diameter at 29 threads per inch and a weft 3 of multi-filament P.T.F.E. 1200 denier at 36 threads per inch. Fig. 2 shows a fabric having alternate warps 4 of 95/5 tin bronze 0.006 inch diameter and 5 of P.T.F.E. 400 denier at 36 threads per inch and aweft 6 of P.T.F.E. 400 denier at 72 threads per inch. Bonding to bearings, i.e. seals, pistons, pistonrings, cylinders, bearing cages, electrical brushes. The fabric may be bonded to a rigid or flexible bearing by heat. In Fig. 3 the leaded fabric 9 of Fig. 1 was rolled at a temperature of 227 ‹ C. to a steel backing 7 coated with lead 8 to " solder " the two together. In Fig. 4 a lead coated steel backing 10 had a strip 12 of lead foil and then the fabric of Fig. 2 (no lead) placed thereon. They were then rolled under heat to " bond " together. Phenolic or epoxy bonding agents may be used.