The Principles, Construction, and Application of Pumping Machinery: (steam ... by Henry Davey

Author:Henry Davey
Language: eng
Format: epub
Publisher: C. Griffin & Company , limited
Published: 1900-03-25T05:00:00+00:00

Fio. 172.

Fio. 178.

F108. 172 and 173.—Corliss Gear.

the valves are those of a compound engine, having pistons moving in opposite directions.

Sometimes the gear is worked by water taken from the pumping main, as in fig. 168. In this case the subsidiary cylinders form cataracts in themselves, the regulation being effected by means of the water stop valves.

Sometimes the differential action is produced without the differential lever, as in hg, 169, where the main valves A are actuated by the direct cataract motion and the cut-off valves B fi by the engine motion. In this illustration cushioning valves G C are shown on the high-pressure cylinder.

Balancing Talve.—With double-acting mining engines working the double B^tem of pump rods it is uae^l to be able to work the engine when it is out of balance, during sinking operations, or when one pump is

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