Pumps and Hydraulics, Part 1 (of 2)

Chapter 60: ELECTRIC MOTOR AND AIR PUMP.

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About This Book

A practical manual that begins with a historical survey and the principles of hydro-mechanics, hydrostatics and pneumatics, then examines flow under pressure, gravity, and friction. It surveys water-pressure machines, water wheels and turbine types, and hydraulic apparatus including jacks, presses, accumulators and rams. The work classifies pumps and provides detailed, illustrated treatments of hand, belted, electric, steam (single, duplex and compound), centrifugal, rotary, jet and injector types, plus compressors, pulsometers and fire and mining applications. Practical guidance on valves, management, calculations, rules, tables and a glossary round out the text.

ELECTRIC MOTOR AND AIR PUMP.

Fig. 240 is intended to show the application of the electric motor to a triplex pump of small size, the plungers being 3¹⁄₈ inches in diameter. The Stroke is 4⁷⁄₈ inches which gives a capacity of 108 cubic inches per revolution, with a pressure of 50 lbs. to the square inch. The pumps require about one-half horse power applied at the motor.

Fig. 240.

The high speed of the motor is reduced by two belt pulleys and two chain wheels. These pumps may be worked independently to produce pressure or vacuum as desired by a separate pipe for each pump.