. Machine design. Fig. 35. 41. Stuffing Boxes. In steam engines and pumpsthe glands for holding the steam and water packingare the sliding bearings which cause the greatest fric-. Fig. 36. tion and the most trouble. Fig. 36 shows the general 92 MACHINE DESIGN. arrangement. B is the stuffing box attached to thecylinder head ; R is the piston rod ; G the gland ad-justed by nuts on the studs shown ; P the packingcontained in a recess in the box and consisting of rings,either of some elastic fibrous material like hemp andwoven rubber cloth or of some soft metal like pressure between the
. Machine design. Fig. 35. 41. Stuffing Boxes. In steam engines and pumpsthe glands for holding the steam and water packingare the sliding bearings which cause the greatest fric-. Fig. 36. tion and the most trouble. Fig. 36 shows the general 92 MACHINE DESIGN. arrangement. B is the stuffing box attached to thecylinder head ; R is the piston rod ; G the gland ad-justed by nuts on the studs shown ; P the packingcontained in a recess in the box and consisting of rings,either of some elastic fibrous material like hemp andwoven rubber cloth or of some soft metal like pressure between the packing and the rod, neces-sary to prevent leakage of steam or water, is the causeof considerable friction and lost work. Experimentsmade from time to time in the laboratories of the CaseSchool have shown the extent and manner of variationof this friction. The results for steam packings maybe summarized as follows: 1. That the softer rubber and graphite packings,which are self-adjusting and self-lubricating, as inNos. 2, 3, 7, 8, and 11, consume less power than theharder varieties. No. 17, the old braided flax style,gives very good results. 2. That oiling the rod will red
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Keywords: ., bookcentury1900, bookdecade1900, bookpublishernewyo, bookyear1906
