Influence of Fluid Film Bearings with Different Axial Groove Shapes on Automotive Turbochargers: An Experimental Study

Most commercial automotive turbochargers (TC) employ semi-floating ring bearings (SFRB) with axial groove shapes. In order to bring some insights into the role played by the axial groove geometry on the dynamics of TC, this work deals with an experimental study of the rotordynamic behavior of a stoc...

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Bibliographic Details
Published in:Lubricants 2022-05, Vol.10 (5), p.92
Main Authors: Machado, Luiz Henrique Jorge, Sandoval, Oscar Ricardo, Pereira, José Victor Matos Carvalho, de Souza, Juliana Primo Basílio, Caetano, Bryan Castro, Hanriot, Vítor Mourão, Pujatti, Fabrício José Pacheco, de Faria, Marco Tulio Correa
Format: Article
Language:English
Subjects:
Accelerometers
axial groove bearing
Bearings
floating ring bearing
Frequency spectrum
Geometry
Grooves
Journal bearings
Lubricants & lubrication
Manufacturing
Pressure transducers
Rotating machinery
Rotating machines
Rotor dynamics
Superchargers
Testing laboratories
Thrust bearings
turbocharger
vibration analysis
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Summary:Most commercial automotive turbochargers (TC) employ semi-floating ring bearings (SFRB) with axial groove shapes. In order to bring some insights into the role played by the axial groove geometry on the dynamics of TC, this work deals with an experimental study of the rotordynamic behavior of a stock automotive turbocharger operating on SFRB with two different groove shapes, which have the same volume and width, and with the same number of grooves. The rotating machine behavior has been evaluated under different operating conditions using a test bench specially designed to analyze turbochargers. Rotordynamic (RD) characteristics of automotive turbochargers are estimated to evaluate the influence of the axial groove geometry on the machine vibratory behavior. Frequency spectra and orbital plots of the rotor are obtained from accelerometers and proximity probes mounted on the turbocharger. The comparative analysis of the vibrational behavior of automotive turbochargers running on different supporting systems allows the identification of the role played by the axial grooves on the machine rotordynamic performance. The experimental results rendered in this work permit to classify the influence of the axial groove geometry on the turbocharger rotordynamic behavior for several speed and flow conditions.
ISSN:2075-4442
2075-4442
DOI:10.3390/lubricants10050092