INFLUENCE OF THE BRAKE DISC FRICTION SURFACE DIMENSION ON THE THERMAL REGIME OF THE DISC BRAKE OF HIGH-SPEED RAILWAY VEHICLES

Liviu Sevastian BOCÎI

Abstract


One of the most important criteria for the use of a brake in the mechanical brake system on high-speed rail vehicles is the temperature of the brake friction elements (chok - wheel or brake disc - friction pad).  The disc brake eliminates the action of the brake blocks on the wheel tread during the braking process and provides the possibility of greater energy dissipations during braking due to use of materials to make friction coupler components with optimum physical-mechanical characteristics.  This work presents an analysis of the thermal regime (thermal flow and temperature) of the components of the disc brake friction coupler.  Also to show the influence of the brake disc friction surface size on the thermal regime were considered four sizes of the brake disc friction surface (Sd = 0,2 m2;  Sd = 0,25 m2,  Sd = 0,3 m2,  Sd = 0,35 m2).   Thus, it was concluded that the use of unventilated brake disc leads to a lighter thermal regime (thermal flow and, consequently, lower temperature of the disc brake friction coupler components) regardless of the type of friction lining used.


Full Text:

PDF

References


J. Adamsen, ”Heating and cooling of Friction Brakes”, Seminar on Braking, London 1986;

L.S. Bocîi, ”Contribuţii la frânarea vagoanelor de călători de mare viteză”, Teză de doctorat, Universitatea Politehnica Timişoara, 1997;

L.S. Bocîi, ”Programa de calculo de la temperatura en ruedas de ferrocarril durante la frenada”, INGENIERIAS, ISSN:1405-0676, Universidad Autonoma de Nuevo Leon Mexico vol. VI, no. 21, 25 – 32, Octubre – Diciembre 2003;

L.S. Bocîi, ”Determination of the friction surface temperature by the Hasselgruber method using brake disc with different physical properties”, revista Metalurgia Internațional, vol. XVI, no. 8 2011, ISSN: 1582-2214, pag. 42 – 47.

M. Boiteux, ”Le probleme de l’adherence en freinage”, Revue Générale de Chemins de Fer, Februarie 1986;

M. Boiteux, ”Influence de l’energie de glissement sur l’adherence exploitable en freinage”, Revue Générale de Chemins de Fer, Octombrie 1987;

J.D. Chen, J.H. Chern Lin, ”Effect of humidity on the tribological behaviour of carbon-carbon composites”, Wear no 193, 1996, pp. 38-47;

F.Demilly, M. Trohel, ”Les disques de frein en acier forge des trains a grande vitesse”, Journees Europeennes du Freinage (JEF 2002), 13 et 14 Mars 2002, Lille France, pag. 103 – 110;

H.R. Ehlers, ”Die thermishe Berechnung der Klotzbremse”, Sonderdruck aus Archiv für Eisenbahntechnik, Folge 18;

H. Hasselgruber, ”Zur Berechnung der Wärmespannungen in der Bremstrommeln von Kraftfahrzeugen beim Haltbremsvorgang”, A. T. Z nr. 2 / 1954;

H. Hasselgruber, ”Temperaturberechnungen für mecanische Reibkupplungen”, Wieweg 1959;

B.L. Karwaski, ”Teoria generală a frânelor automate”, Oficiul de presă, Editură şi documentare CFR, 1950;

O. Iordache, O. Smigelschi, ”Ecuaţiile fenomenelor de transfer de masă şi căldură”, Editura Tehnică Bucureşti;

L. Sofroni, , I. Ripoşan, V. Brabie, M. Chişamera, ”Turnarea fontei”, Editura Didactică şi Pedagogică, Bucureşti 1985;

L.Sofroni, V. Brabie, C. Bratu, ”Bazele teoretice ale turnării”, Editura Didactică şi Pedagogică, Bucureşti 1980.

C. Baron Saiz, T. Ingrassia, V. Nigrelli, V. Ricotta, ”Thermal stress analysis of different full and ventilated disc brakes”, Frattura ed Integrità Strutturale, 34 (2015) 608-621; 2015, https://doi.org/10.3221/IGF-ESIS.34.67;

N. Kudarauskas, ”Analysis of emergency braking of a vehicle”, Transport, 22:3, 154-159, 2007, https://doi.org/10.1080/16484142.2007.9638118;

A. Adamowicz, P. Grzes. ”Influence of Convective Cooling on a Disc Brake Temperature Distribution During Repetitive Braking”, Applied Thermal


Refbacks

  • There are currently no refbacks.


JOURNAL INDEXED IN :