By Michael Volk
"This ebook deals a pragmatic advent to pumps and gives the instruments essential to opt for, dimension, function, and continue pumps accurately. It highlights the interrelatedness of pump engineering from approach and piping layout to set up and startup. It presents new case stories designed to teach real-world purposes. The book's paintings application has been redone, with all figures now showing in complete colour It is additionally an outstanding textual content for upper-level undergraduate and graduate scholars in departments of mechanical engineering, mechanical engineering know-how, or engineering technology"-- Read more...
summary: "This publication deals a pragmatic advent to pumps and gives the instruments essential to pick out, dimension, function, and keep pumps accurately. It highlights the interrelatedness of pump engineering from approach and piping layout to deploy and startup. It presents new case reviews designed to teach real-world purposes. The book's paintings software has been redone, with all figures now showing in complete colour it's also an exceptional textual content for upper-level undergraduate and graduate scholars in departments of mechanical engineering, mechanical engineering know-how, or engineering know-how"
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Additional info for Pump characteristics and applications
The pumps are relatively quiet (particularly if helical or herringbone gears are used), largely free of pulsations, and economical. Disadvantages include the fact that there are usually four bushings in the liquid area, and, unless timing gears are used, these pumps cannot tolerate solids or abrasives. The weakest element in most gear pumps (external gear or internal gear type) is the driven gear bearing. One might think that the driving gear Introduction to Pumps 25 carries 100% of the load, so the driving bearings should wear the most, but this is not the case.
In the kinetic category, the most common arrangement is the centrifugal pump. Other arrangements include regenerative turbines (also called peripheral pumps) and special pumps such as jet pumps that employ an eductor to bring water out of a well. In the PD category, the two most common subcategories are reciprocating and rotary pumps. 3 deal with the specific geometry used. With centrifugal pumps, the geometry variations have to do with the support of the impeller (overhung impeller vs. impeller between bearings), rotor orientation, the number of impellers or stages, how the pump is coupled to the motor, the pump bearing system, how the pump casing is configured, and pump mounting arrangements.
27) are similar to piston and plunger pumps, except that the reciprocating motion of the pump causes a diaphragm to flex back and forth, which in turn causes the liquid to flow into and out of the liquid end of the pump. 26). The diaphragm is usually made of an elastomeric material to allow it to flex. The diaphragm can be mechanically attached to the reciprocating member or it can be separated and actuated by a reservoir of hydraulic fluid, often with a contour plate to control the travel limits of the diaphragm.