Original scientific paper
Influence of tribological processes of the mechanisms of free motion on operational characteristic of the impulsive friction variators
Bogdan NEDIĆ
orcid.org/0000-0002-4236-3833
Željko ROSANDIĆ
Desimir JOVANOVIĆ
Milomir ČUPOVIĆ
Vlatko MARUŠIĆ
Abstract
The impulsive friction variators are very specific transmitters. They are characterised by the periodical impulse transmission of power and motion. For research purposes, the device was made to simulate wear of the tribomechanical system: external envelope (coulisse) – roller and roller-shaft in the free motion mechanism with use of the impulsive friction variators. Monitoring of the elements of tribomechanical system was conducted by recording the changes of dimensions depending on the investigation time. Roughness parameters were measured and wear traces of the tribomechanical system were recorded. It was concluded that at the shaft (star), a dominant mechanism of wear is pitting, and that destruction of the oil film precedes the damage at the coulisse (roller). By analysing the change of the gap and influence of the change of wedging angle, it is determined that the period of intensive wear at the beginning and the period of constant wear can be differentiated. It was concluded that the change of the gap clearly represents the
Keywords
Impulsive friction variators; Tribological processes
Hrčak ID:
95175
URI
Publication date:
28.2.2012.
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