Hints on steam-engine design and construction. With practical suggestions for the guidance of junior engineers and students by Hurst Charles

Author:Hurst, Charles
Language: eng
Format: epub
Tags: Steam-engines -- Design and construction, Steam-engines -- Design
Publisher: London, Griffin
Published: 1901-03-25T05:00:00+00:00

CHAPTER V. MOTION WORK.

THE foregoing remarks dealt chiefly with the fixed parts of engines, or those parts which directly influence the course and action of the steam. The purely mechanical portions of engines now remain to be considered.

Piston-rods.—In designing piston-rods it is a good rule to allow a stress not exceeding 4500 Ibs. through the weakest place, which is generally through the cotton hole, a rule which

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Fig. 16.

gives sufficient strength to allow for the length of the rod as well as the direct thrust of the pistons. The methods of securing the piston to the rods are numerous, some of them being not altogether satisfactory. A very common practice is to have both a collar and a taper, as shown by Fig. 16. With this arrangement it is difficult to get a good fit both on the collar

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