๐”– Bobbio Scriptorium
โœฆ   LIBER   โœฆ

Vibration and wear detection in rotating machinery by acoustic analysis

โœ Scribed by C.W. Stammers

Publisher
Elsevier Science
Year
1989
Tongue
English
Weight
239 KB
Volume
28
Category
Article
ISSN
0003-682X

No coin nor oath required. For personal study only.

โœฆ Synopsis

This technical note illustrates the value of acoustic monitoring. Three investigations in differing areas of engineering are described.

The first concerns excessive noise in the drive of a low speed wind tunnel During runs at differing fan speeds a specific bearing was identified as the noise source. On replacement the overall noise level fell several decibels.

The second case concerns a universal milling machine which began to emit excessive noise. Eighteen different spindle speeds, involving nine possible gear pairs, can be selected. Knowledge of gear meshing frequencies enabled two specific gear pairs to be identified from analysis of the noise at various spindle speeds.

The third study concerns an oil fired burner, intended for domestic heating, the noise levels of which were of concern. The sliding vane compressor of this unit was identified as the prime noise source. Frequency analysis indicated that vane vibration was the source of the problem. Redesign of the vane and slot was recommended.

๐Ÿ“œ SIMILAR VOLUMES

VIBROโ€“ACOUSTIC ANALYSIS AND IDENTIFICATI
VIBROโ€“ACOUSTIC ANALYSIS AND IDENTIFICATION OF DEFECTS IN ROTATING MACHINERY, PART I: THEORETICAL MODEL
โœ N. Hamzaoui; C. Boisson; C. Lesueur ๐Ÿ“‚ Article ๐Ÿ“… 1998 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 251 KB

The objective of our work is the association of vibratory diagnosis knowledge with an acoustic part including frequential and spatial criteria for the identification of noise sources in rotating machinery. To control parameters for this difficult problem, one proceeds by stages and with confrontatio

VIBROโ€“ACOUSTIC ANALYSIS AND IDENTIFICATI
VIBROโ€“ACOUSTIC ANALYSIS AND IDENTIFICATION OF DEFECTS IN ROTATING MACHINERY, PART II: EXPERIMENTAL STUDY
โœ N. Hamzaoui; C. Boisson; C. Lesueur ๐Ÿ“‚ Article ๐Ÿ“… 1998 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 513 KB

The companion paper, Part I, is a theoretical modelling which consists in developing a vibro-acoustic calculation of a rotating rotor on bearings with a numerical simulation of mechanical defects. Controlled error and small computation time distinguish the method. This paper presents the experimenta

THE ENHANCEMENT OF IMPULSIVE NOISE AND V
THE ENHANCEMENT OF IMPULSIVE NOISE AND VIBRATION SIGNALS FOR FAULT DETECTION IN ROTATING AND RECIPROCATING MACHINERY
โœ S.K. Lee; P.R. White ๐Ÿ“‚ Article ๐Ÿ“… 1998 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 616 KB

Impulsive sound and vibration signals in machinery are often caused by the impacting of components and are commonly associated with faults. It has long been recognized that these signals can be gainfully used for fault detection. However, it tends to be difficult to make objective measurements of im

HIGHER-ORDER TIMEโ€“FREQUENCY ANALYSIS AND
HIGHER-ORDER TIMEโ€“FREQUENCY ANALYSIS AND ITS APPLICATION TO FAULT DETECTION IN ROTATING MACHINERY
โœ S.K. Lee; P.R. White ๐Ÿ“‚ Article ๐Ÿ“… 1997 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 369 KB

Impulsive acoustic and vibration signals within rotating machinery are often induced by irregular impacting. The detection of these impulses can be useful for fault diagnosis purposes. Recently there has been an increasing trend towards the use of higher-order statistics for fault detection within m

BLIND SOURCES SEPARATION APPLIED TO ROTA
BLIND SOURCES SEPARATION APPLIED TO ROTATING MACHINES MONITORING BY ACOUSTICAL AND VIBRATIONS ANALYSIS
โœ G. GELLE; M. COLAS; G. DELAUNAY ๐Ÿ“‚ Article ๐Ÿ“… 2000 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 251 KB

Blind Sources Separation (BSS) is a promising technique for signal processing and data analysis that allows the recovery of unknown signals (called sources) from observed signals mixed by an unknown propagation medium. The adjective &blind' indicates that no assumption was done on the signals and th