Sound and Vibrations of Positive Displacement Compressors: 1st Edition (Hardback) book cover

Sound and Vibrations of Positive Displacement Compressors

1st Edition

By Werner Soedel

CRC Press

343 pages | 198 B/W Illus.

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pub: 2006-10-20
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Description

Positive displacement compressors are the most common type of compressor for commercial applications and among the most important in industrial use. Effective control of noise and vibration stems from a deep understanding of their sources, effects, and behavior in the compressor's various components. Based on more than 30 years of research and practical experience, Sound and Vibrations of Positive Displacement Compressors is the first book to combine theory and design guidelines dedicated solely to compressors.

After introducing the sound- and vibration-producing mechanisms common to different types of compressors, the author discusses free and forced vibrations of compressor housing shells, mainly for hermetically sealed designs. He then examines vibration in casings and other components, such as suction and discharge tubes, along with surging in coil springs. Detailed chapters explore the design and vibrations of automatic plate or reed valves as well as the analysis and design of suction and discharge mufflers, while the final chapters cover multidimensional acoustics, measurements and source identification, electromotors, and the influence of lubrication oil on sound and vibrations.

Illustrated by numerous diagrams and several case studies, Sound and Vibrations of Positive Displacement Compressors guides in the analysis and design of compressors for minimal sound and vibration production and suggests various noise control measures.

Reviews

"This book, written by a scientist and engineer of high level and intended for engineers, presents a deep understanding and effective concepts of noise and vibration control in compressors, and thus may be very useful for specialists in the corresponding areas."

– Yuri N. Sankin, in Zentralblatt Math, 2009

Table of Contents

INTRODUCTION

General

The Compression Process

Valves

Suction and Discharge Manifolds and Pipes

Casing

Hermetic Housing Shell

Vibration Isolation Springs

Oil Sump

OVERVIEW OF NOISE SOURCE AND TRANSMISSION MECHANISMS BY TYPE OF COMPRESSOR

Reciprocating Compressors

Rotary Vane Compressor

Rolling Piston Compressors

Scroll Compressor

Screw Compressor

NATURAL FREQUENCIES AND MODES OF COMPRESSOR HOUSINGS

Equations of Motion

Boundary Conditions

Natural Frequencies and Modes

Further Simplification

Vibration Localization at End Caps

COMPRESSOR HOUSINGS THAT ARE NOT AXISYMMETRIC

Mode Splitting Caused by a Mass or Stiffness

Mode Splitting Caused by Ovalness

Example of Experimentally Obtained Housing Modes

MODIFICATIONS OF HOUSING NATURAL FREQUENCIES AND MODES

Stiffening of Compressor Housing

The Influence of Residual Stresses

FORCED VIBRATION OF COMPRESSOR HOUSING (SHELL)

Modal Series Expansion Model

Steady-State Harmonic Response

Housing Dynamics in Terms of Modal Mass, Stiffness, Damping, and Forcing

Steady-State Response of Shells to Periodic Forcing

Remarks About Dissipative Damping

Dynamic Absorbers

Friction Damping

FREE AND FORCED VIBRATIONS OF COMPRESSOR CASINGS

The Three-Dimensional Equations of Motion for an Elastic Solid

Free and Forced Vibrations

Steady-State Harmonic Response

Response of the Casing to Impact

Steady-State Response of the Compressor Casing to Periodic Forcing

VIBRATIONS OF OTHER STRUCTURAL COMPONENTS OF A COMPRESSOR

Vibration and Force Transmission of Discharge or Suction Tubes

Vibration Isolation Considering Idealized Springs

Surging in Coil Springs Interfering with Vibration Isolation

SOUND AND VIBRATION OF COMPRESSOR VALVES

Remarks About Types of Compressors and Their Valving

A Simplified Approach to Understanding Valve Design

Useful Valve Calculations

Valve Dynamics

Stresses in Valves

SUCTION OR DISCHARGE SYSTEM GAS PULSATIONS AND MUFFLERS

Reducing Valve Noise

Reactive Mufflers Using the Helmholtz Simplification

The Continuous System Approach Applied to Tubelike Compressor Suction and Discharge Manifolds

Typical Behavior of Simple Compressor Suction or Discharge Mufflers

MULTIDIMENSIONAL COMPRESSOR SOUND

Three-Dimensional Acoustic Wave Equation

Sound Radiation from the Compressor Housing (or Casing)

Gas Pulsations in the Cavity between the Compressor Casing and Housing

REMARKS ON SOUND AND VIBRATION MEASUREMENTS AND SOURCE IDENTIFICATION

Rooms for Measuring Sound

Repeatability of Measurements

Identification of Sound and Vibration Mechanisms

MISCELLANEOUS SOUND AND VIBRATION SOURCES OR EFFECTS

Electromotors

Lubrication Oil

REFERENCES

INDEX

Subject Categories

BISAC Subject Codes/Headings:
TEC009070
TECHNOLOGY & ENGINEERING / Mechanical