The Reciprocating Pump Theory Design And Use Pdf

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A plunger pump operates using the reciprocating motion of plungers or pistons. Depending on the design of the pump, the use of a single or multiple plungers may be used.

Introduction: Machines which deliver liquids with pressure are simply called pumps. Earlier we discussed mainly centrifugal pumps with water as a working fluid. In this chapter we shall decribe briefly positive displacement pumps which includes pumps using oil as working fluid.

Reciprocating Pump – Components, Working and Uses

Thank you for interesting in our services. We are a non-profit group that run this website to share documents. We need your help to maintenance this website. Please help us to share our service with your friends. Share Embed Donate. Mmer White Rock Engineering, Inc. No par! No liability is assumed with respecl lo the use of the iriformation contained herein.

Printed in the United States of America. L Titie. M55 62L6'5-dc20 CIP! Pump and the Reciprocating Pump had greatly increased because of the increased interest in reciprocating pumps for highly technical applications and high to extremely high discharge pressures l0, to!

High discharge pressure requirements prompted a discussion of high-pressure pump design and the method of Autofrettage of pump liquid-ends in order to reduce corrosion-fatigue failures in high pressure use. Additional experience in the complicated effects of suction requirements has led to a completely new approach to the problems. This Edition is dedicated to the memory of my loving Margaret, who away on April 16, , after 56 years of companionship of the kind that gave me the encouragement to complete this book and who, with the ravages of Alzheimers, sat for hours with an autographed copy of the First Edition clasped to her breast.

JOHN E. For rnany years there has been sorne confusion in the rnatter of the effects of liquid dynarnics ftow variation and acceleration on the performance of reciprocating purnps. One possible reason is the great difference between reciprocating and centrifuga! Another reason is the neglect that reciprocating purnp theory has experienced in the midst of an increase in the problerns resulting frorn high-speed operation as the result of rnanufacturers' frequent speed upratings applied over the years dueto the pressure of cornpetition and econornics.

Many subjects in this book are covered by rneans of discussion, allowing the reader to better understand the cause and effect. In rnany cases, examples of calculations and derivations are given to support the explanation. Aside frorn the casual interest associated with the past history of purnps, such history is sornetirnes used to draw attention to discarded ideas so that reinvention of the wheel will be avoided. And they rnay stirnulate new ideas. A rather new and wide application of reciprocating purnps is in the transportation of solids in the form of a liquid-rnixed slurry.

This subject is covered in sorne detail. In order to provide a cornprehensive encyclopedia of reciprocating purnps, Chapters 13 and 14 contain many useful tables, charts, and conversions. After expressing appreciation to Oilwell Division of U.

Steel Corp. All are well experienced in the field of reciprocating pumps and have reviewed the manuscript and offered many worthy suggestions. My wife, Margaret, supplied the encouragement. Piston Pumps I 33 Interna!. Ll A mechanical device used to impart a pulsating, dynamic flow to a liquid and consisting of one or more single- or double-acting positivedisplacement elements pistons or plungers.

The elements in the liquid end are driven in a more or less harmonic motion by a rotating crank and connecting rod mechanism. The liquid flow generated by this reciprocating motion is directed from the pump inlet suction to the pump outlet discharge by the selective operation of self-acting check valves located at the inlet and outlet of each displacement element.

A pump in which the axial centerline ofthe cylinder, piston, piston rod, and CTO! See Figure 1. A pump in which the axial centerline of the cylinder, plunger, extension rod, and crosshead is vertical.

See Figures 1. This arrangement allows, in effect, a single-acting pump to perform like a double-acting, thereby eliminating the usual half-stroke period of no delivery.

The delivery is divided into two reduced and equal flow rates per stroke, thereby permitting improved pulsation control with a dampener of smaller size. Figure 1. Courtesy Oilwell Division, U. Vertical triplex single-acting plunger pump. A pump in which the liquid in each cylinder is discharged only during a head-end or crank-end stroke during one half of a revolution. A pump in which the liquid in each cylinder is discharged during both a head-end and a crank-end stroke during one full tevolution.

Horizontal quintuplex single-acting plunger pump. A pump in which the liquid is displaced by pistons. A pump in which the liquid is displaced by plungers. Horizontal single-acting plunger Pump. Horizontal triplex single-acting plunger pump. Simplex horizontal single-acting plunger pump. Courtesy Kerr Machine Co.

Ada, OK. A pump consisting of a single cylinder. Contains one piston or its equivalent, that is, a single- or double-acting piston. Contains two pistons or their equivalent, that is, single- or double-acting pistons. A pump consisting of three or more cylinders.

Contains more than two pistons or their equivalent, that is, single- or double-acting. A Figure 1. A double-acting design attained by driving an opposed set of single-acting cylinders by means of articulated connecting rods that drive the opposed crossheads, giving the character of a single-acting pump in a doubleacting action.

See Figure l. A doubie-acting design attained by driving an opposed set of single-acting cylinders by means of crankshaft-straddling connecting bars that drive the opposed crossheads, giving the character of a single-acting pump in a doubleacting action. The membrane pump, sometimes erroneously referred to as a "diaphragm" pump differs from the diaphragm pump in that clean liquid displaced by a conventional piston pump is used in tum to ''pulse'' an isolated membrane of rather large diameter and of great placed in a chamber between the piston liquid end and the "dirty" or abrasive pumped liquid on the opposite side.

Horizontal triplex articulated piston pump. A single-acting or double acting reciprocating pump with the displacing piston being replaced with a fixed-edge flexible diaphragm being reciprocated by a piston-rod connected to the center of the diaphragm. This arrangement eliminates the actual wear and leakage path between a moving piston and the liner.

Positive displacement is obtained by the alternating "pulses" of the diaphragm. These pumps were developed for low-pressure high-volume handling of abrasive liquids. Neither the membrane nor the diaphragm pump will isolate the valves from the liquid being pumped. Two tough rubber discs reciprocate in opposition to each other.

A Iarge cavity is created between them at one end of the stroke, producing a positive suction and discharge sequence, resulting in a smooth positive pumping action. The end of the liquid end farthest from the crankshaft. Sometimes called the cylinder head end in horizontal pumps. The end of the liquid end closest to the crank- shaft.

Travel of the piston toward the head end. Travel of the piston toward the crankshaft. An additional crosshead located outside the power end of the pump at the head end and usually driven by rods connected to the interna! In such pumps the plunger travels toward the crankshaft on the delivery stroke. Most vertical pumps use this feature. Piston membrane pump, sectional, Hquid end. Wearing parts: 6 valve eones, 7 valve seats, 8 valve rubbers, 9 pump membranes.

A term usually used 1. The Institute is an organization of pump manufacturers that has been in existence in the U nited States since Purpose The nomenclature and definitions in these Standards were prepared to provide a means for identifying the various pump components covered by these Standards and also to serve as a common language for all who "' "'e D.

Numbers to right of curves indicate modulus. However, one can readily see that this. The second method to reduce waterhammer is a simple bypass or a relief device Fig. In sorne cases, the water is discharged into the supply tank through a line connecting the relief valve to the tank.

This method not very reliable and requires frequent inspection and maintenance. Air chambers also offer a solution for the waterhammer problem. Air within the chamber occupies only 4. Kinetic energy is thus converted to potential energy. However, if the system pressure reduces below the design pressure, trapped air in the air chamber will discharge into the system, thus rendering the entire device ineffective.

In addition, the compressed air in direct contact with the water tends to slowly dissolve into the water, which also diminishes the device's surge-dampening capability. Then, when the system pressure is reduced, the dissolved air resumes its gaseous fonn, causing undesirable sponginess in the system and possible damage to the system components. The shortcomings and deficiencies of air chambers are e:ffectively eliminated in gas-loaded, flexible, separator-type surge suppressors Fig.

Gas confined inside a flexible bladder separator provides an efficient means of transfonning the system's kinetic energy into potential energy. A gas-filled separator-type surge suppressor is installed upstream and close to the valve, which is the source of the waterhammer Fig.

The Reciprocating Pump Theory, Design, And Use - John E. Miller 2nd Edition

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No par! No liability is assumed with respecl lo the use of the iriformation contained herein. Printed in the United States of America. John Evans , L Titie. M55 62L6'5-dc Pump and the Reciprocating Pump had greatly increased because of the increased interest in reciprocating pumps for highly technical applications and high to extremely high discharge pressures l0, to!


PDF | Reciprocating pumps are those in which the oscillating motion of pistons, plungers or membranes causes a fluid to move. The discharge of a single-acting.


Positive Displacement Reciprocating Pump Fundamentals - Power And Direct Acting Types

Note: At the bottom of this article you will find the PDF downloadable link and continue your learning offline. A reciprocating pump is a hydraulic machine which converts the mechanical energy into hydraulic energy. Reciprocating pumps are more suitable for low volumes of flow at high pressures. The suction valve is a non-return valve which means the only one-directional flow is possible in this type of valve. Delivery valve also non-return valve placed between the cylinder and delivery pipe outlet.

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    The Reciprocating Pump Theory, Design, And Use - John E. Miller 2nd Edition DOWNLOAD PDF - MB. Share Embed Donate.