Identifikacija napak elektronsko komutiranih puhal na podlagi meritev zvočnega tlaka in pospeška

magistrsko delo magistrskega študijskega programa II. stopnje Strojništvo

Gašper Čemažar (Author), Janko Slavič (Mentor)

Abstract

V tem delu so predstavljene najpogostejše napake v proizvodnem procesu elektronsko komutiranega industrijskega puhala. Predstavimo tudi elementarne vire hrupa in vibracij puhala. Osredotočimo se na mehanski vir hrupa, ki nastane kot posledica strukturnih vibracij ležajev. Opišemo tudi metode za odkrivanje napak na ležajih. Za identifikacijo napak na ležajih uporabimo Hilbertovo transformacijo signala zvočnega tlaka in pospeškov vibracij, s katero dobimo ovojnico signala. Princip delovanja analize ovojnice najprej preverimo s sintetičnim eksperimentom simulirane napake na ležaju. Z analizo ovojnice smo uspešno identificirali tipične frekvence poškodovanih ležajev puhala tako na podlagi pospeškov kot tudi zvočnega tlaka.

Keywords

magistrske naloge;ležaji;EC puhalo;vibracije;zvočni tlak;analiza ovojnice;Hilbertova transformacija;

Data

Language:	Slovenian
Year of publishing:	2021
Typology:	2.09 - Master's Thesis
Organization:	UL FS - Faculty of Mechanical Engineering
Publisher:	[G. Čemažar]
UDC:	621.822:621.63:534(043.2)
COBISS:	91595011
Views:	151
Downloads:	41
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	English
Secondary title:	Fault identification of electronically commutated blowers based measurement of sound pressure and acceleration
Secondary abstract:	This work presents the most common errors in the production of electronically commutated blowers. Elementary sources of noise and vibration are described as a more complex source of a blower’s noise. The main focus is on mechanical sources of noise and their identification as a consecuence of structural vibrations of the bearings. To identify bearing error, Hilbert transform of sound pressure and acceleration signal is used, which results in an envelope of a signal. The principle of envelope analysis is first verified by a synthetic experiment of simulated bearing failure. By envelope analysis, we successfully identified typical frequencies of damaged bearings based on both accelerations and sound pressure.
Secondary keywords:	master thesis;bearings;EC blower;vibrations;sound pressure;envelope analysis;Hilbert transform;
Type (COBISS):	Master's thesis/paper
Study programme:	0
Embargo end date (OpenAIRE):	1970-01-01
Thesis comment:	Univ. Ljubljana, Fak. za strojništvo
Pages:	XXVI, 70 str.
ID:	14167746