Open AccessASSESSMENT OF THE RELEVANCE OF USE IN THE CONSTRUCTION OF A FOREST TRACTOR WITH A SEMI-TRAILER OF A RECUPERATIVE PNEUMATIC HYDRAULIC SADDLE DEVICE
Author(s) -
Valeriy Posmetev,
Вадим Никонов,
Aleksandr Avdyuhin
Publication year - 2022
Publication title -
voronežskij naučno-tehničeskij vestnik
Language(s) - English
Resource type - Journals
ISSN - 2311-8873
DOI - 10.34220/2311-8873-2022-76-94
Subject(s) - tractor , truck , automotive engineering , axle , engineering , trailer , coupling (piping) , structural engineering , mechanical engineering
The main advantages of using timber tractors with semitrailers in comparison with single timber trucks and timber trucks with trailers are listed. The analysis of the results of scientific works of foreign authors engaged in increasing the efficiency of timber haulers with semi-trailers in the process of hauling timber is carried out. The existing conditions for the transportation of timber in the Russian Federation by timber haulers with semitrailers are considered. Described are the negative consequences that are manifested in the process of movement on forest roads, limiting the efficiency of using timber tractors with semi-trailers. Among them, the most significant one is highlighted, which consists in the occurrence of significant efforts when braking a timber tractor with a semitrailer in a fifth wheel coupling, accompanied by the appearance of cracks in the elements of the supporting system, breakdowns in the coupling device, as well as folding of the timber road train. The schemes of forces acting on a timber tractor with a semitrailer during braking are presented. The dependences of the change in the braking forces of the axles of a timber tractor with a semitrailer are given, taking into account the non-simultaneous operation of their braking mechanisms, as well as the change in the force in the fifth wheel coupling of a timber tractor with a semitrailer during braking. In order to increase the efficiency of a logging tractor with a semitrailer, a promising design of a recuperative fifth wheel coupling has been proposed.