1st Edition
Sound and Vibrations of Positive Displacement Compressors
By Werner Soedel
Copyright 2007
368 Pages
198 B/W Illustrations
by
CRC Press
343 Pages
by
CRC Press
Also available as eBook on:
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... Read more
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
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
Biography
Werner Soedel
"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
