Mehanizam trenja i trošenja vodećeg prstena projektila / Friction and wear mechanism of the projectile rotating band

• Main Authors: Zoran Ristić, Slobodan Ilić, Aleksandar Kari
• Format: Article
• Language: English
• Published: University of Defence in Belgrade 2005-09-01
• Series: Vojnotehnički Glasnik
• Subjects: vodeći prsten; trošenje; trenje; topljenje; koeficijent trenja; klizanje; toplotne karakteristike; rotating band; wear; friction; melting; friction coefficient; sliding; thermal properties
• Online Access: http://scindeks.ceon.rs/Article.aspx?artid=0042-84500505397R

U radu je opisan mehanizam trenja i trošenja vodećeg prstena projektila usled zagrevanja i topljenja kontaktne površine projektila. Primenjen je model hidrodinamičkog klizanja vodećeg prstena i postavljena Rejnoldsova jednačina za "fluid" (otopljeni film). Pretpostavlja se da je temperatura fluida konstantna i jednaka temperaturi topljenja na kontaktnim površinama. Na osnovu ukupnog prelaza toplote sa filma koji je stvoren između topljive i netopljive površine (model Landan) određeni su rezultati za debljinu filma, koeficijent trenja i trošenje materijala. U raduje određena veličina trošenja vodećeg prstena i uticaj nekih parametara na silu trenja i debljinu filma otopljenog materijala prstena. Dobijeni rezultati ilustrovani su na odabranom primeru. / Friction and wear model of rotating band, due to, heating and melting material between the contact surface of a bore and projectile is described in this paper. The hydrodynamic slider-bearing model of the metal rotating band is applied and the Reynold's equation for the "fluid" (melting film) has been used in this work. The fluid temperature was assumed to be constant and equal to the melting temperature on the contact surface. Based on the total heat transfer from the film, which is made, between the melting on the non-melting surface (Landan model) and certain results of the film thickness, the coefficient of melt friction and the material wear were achieve. The size wears of the projectile rotating band and influence of certain parameters on the friction force and the film thickness are given in this paper. The achieved results have been illustrated by chosen example.