REPUBLIC OF SERBIA

MINISTRY OF DEFENCE

www.mod.gov.rs

MINISTRY OF DEFENCE

Material Resources Sector

Defensive Technologies Department

Military Technical Institute

www.vti.mod.gov.rs

AN ANALYSIS OF THE EFFICIENCY OF UTILIZATION OF INVOLUTE CYLINDRICAL GEAR PAIRS

PREDRAG DOBRATIĆ

University of Defence in Belgrade, Military Academy, dobraticp@yahoo.com

MILETA RISTIVOJEVIĆ

University of Belgrade, Faculty of Mechanical Engineering, mristivojevic@mas.bg.ac.rs

BOŽIDAR ROSIĆ

University of Belgrade, Faculty of Mechanical Engineering, brosic@mas.bg.ac.rs

Abstract: The impact of geometric and kinematic parameters of a teeth to the efficiency of utilization of involute spur gears, when the total contact ratio is , i.e. transverse contact ratio is , has been analyzed in this paper. The mathematical model and computer program for determining the current and the effective value of the efficiency of utilization has been developed. The influence of the character of load distribution during the meshing period is included in the factor of load distribution. The results of computer program are given in the form of a diagram of the current values of the efficiency of utilization during the meshing period and the values of effective efficiency of utilization for the considered cylindrical gear pair have been calculated.

Keywords: cylindrical gears, efficiency of utilization, double mesh of teeth.