employee
Bryansk, Bryansk, Russian Federation
graduate student
Bryansk, Bryansk, Russian Federation
UDC 621.891
UDC 629.113
Russian Library and Bibliographic Classification 393
An approach to predicting tribotechnical indicators of friction pairs of transport machine differentials is presented, which allows taking into account various types and modes of friction due to uneven and reversible movement of contacting parts, in order to prevent critical failures of differentials associated with jamming (coupling) of friction surfaces. This approach is based on the use of modified RANS equation with corrections for surface roughness, Greenwood-Williamson model of contact interaction of rough surfaces, and the law of energy conservation under friction. An algorithm for calculating tribological conjunctions of differentials operating under conditions of unsteady friction using numerical methods is developed. The results of calculations of tribotechnical indicators according to the proposed approach are compared with the test results of the bridge differential of Rottne H14C logging harvester. As a result, it is found that the relative error in calculating the friction factor and the temperature of frictional heating does not exceed 20% and 8%, respectively. Recommendations are made on ensuring tribotechnical indicators and preventing coupling (jamming) of the driving couplings of differential gears, concerning the roughness parameters and the final method of machining the contacting surfaces, the operating time of the differential when the wheel slips, as well as the used structural materials and lubricants.
pairs, friction, differential, tribotechnical indicators, modeling, process
1. Izmailov VV, Novoselova MV. Fundamentals of mechanics and physics of contact interaction, friction and wear of technical surfaces: textbook for universities. Moscow: Lan; 2025.
2. Myshkin NK, Petrokovets MI. Friction, lubrication, and wear. Physical foundations and technical applications of tribology. Moscow: Fizmatlit; 2007.
3. Hebda M, Chichinadze AV, editors. Handbook of tribotechnics. Theoretical foundations. Moscow: Mashinostroenie; 1989.
4. Chichinadze AV, Brown ED, Boucher NA. Fundamentals of tribology (friction, wear, lubrication): textbook for technical universities. 2nd ed. Moscow: Mashinostroenie; 2001.
5. Garkunov DN. Tribotechnics (design, manufacture and operation of machines): textbook. Moscow: MSHA Publishing House; 2002.
6. Goryacheva IG. Mechanics of frictional interaction. Moscow: Nauka; 2001.
7. Demkin NB, Izmailov VV. Dependence of operational properties of the friction contact on the microgeometry of contacting surfaces. Friction and Wear. 2010;31(1):68-77.
8. Bakhvalov NS, Zhidkov NP, Kobelkov GM. Numerical methods. Moscow: BINOM; 2004.
9. Bishutin SG. Defects in parts and causes of failure of automobile differentials. Collection of Papers of VII International Scientific and Practical Conference, November 21-23, 2023: Innovations in Information Technology, Mechanical Engineering and Motor Transport; Kuzbass State Technical University named after TF Gorbachev. Kemerovo; 2023.
10. Liu Yu. Experimental and numerical study of unsteady mixed lubrication of cylindrical gears under start-stop conditions. Journal of Tribology Asme. 2021;153:102-110.
