Zobrazeno 1 - 10
of 63
pro vyhledávání: '"VELICU Radu"'
Autor:
VELICU Radu, JURJ Lenard
Publikováno v:
Annals of the Oradea University: Fascicle Management and Technological Engineering, Vol XXV (XV) (2016)
The aim of this paper is to describe the theoretical pressure distribution and loading capacity of the chain joints. The lubricating contact between pin and bush (bush chains) or pin and tooth cleat (silent chains) is modelled with Ocvirk’s short b
Externí odkaz:
https://doaj.org/article/c46fbe03bdc64ce6ac92099c5d71f44d
Autor:
VELICU Radu, POPA Silviu
Publikováno v:
Annals of the Oradea University: Fascicle Management and Technological Engineering, Vol XXV (XV) (2016)
The subjects of this paper are the bearing boxes of a testing rig for chain drives. Friction in transmission without bearings is calculated by subtracting the bearing friction from the global friction. This is why it is of maximal importance for the
Externí odkaz:
https://doaj.org/article/d43ffa61e2c947ffaf207b357e51931c
Autor:
VELICU Radu, LATES Mihai
Publikováno v:
Annals of the Oradea University: Fascicle Management and Technological Engineering, Vol XXIV (XIV) (2015)
The aim of this research is friction measurements on the bearing boxes of a testing rig for parallel axes transmissions. Friction in the transmission without bearings is calculated by subtracting the bearing friction from the global friction. This is
Externí odkaz:
https://doaj.org/article/d73719e0901f4e5ab70f5e1b90ed7f9e
Publikováno v:
Annals of the Oradea University: Fascicle Management and Technological Engineering, Vol XXIV (XIV) (2015)
The paper presents the analysis of tribological contacts between the tensioning guide and toothed chain generally used in the combustion engines. First, it is identified geometry which defines the contact between the tensioning guide and the toothed
Externí odkaz:
https://doaj.org/article/1c95e1c50a3245a1ad43e1706ecab35b
Autor:
GAVRILA Cornel Catalin, VELICU Radu
Publikováno v:
Annals of the Oradea University: Fascicle Management and Technological Engineering, Vol XXIV (XIV) (2015)
Mechanical structures virtual modeling, as multibody systems with a minimal bodies number, in the real time simulation of product dynamic behavior is a necessity. For a company, it saves time in product developing, reduces the number of physical prot
Externí odkaz:
https://doaj.org/article/924018a0f25f4448b4a92dd68f0af60f
Publikováno v:
MATEC Web of Conferences, Vol 184, p 02003 (2018)
Silent chains tend to have more and more usage in automotive industry. The study of these types of chains has a lot to consider due to the fact that silent chains are not standardized yet. The aim of this paper is to study and analyse the theoretical
Externí odkaz:
https://doaj.org/article/71bc05c4fd854360955bdb3c149f41df
Autor:
Jurj Lenard, Velicu Radu
Publikováno v:
MATEC Web of Conferences, Vol 184, p 02002 (2018)
This paper is dealing with the evaluation of friction in timing chains. Benchmarking friction is based on the experimentally determined friction losses in basic chain drives with transmission ratio i=1. This friction is not including friction losses
Externí odkaz:
https://doaj.org/article/e83a0fcc64fc4c5da70ab8f6659fe8f3
Publikováno v:
MATEC Web of Conferences, Vol 184, p 02023 (2018)
The aim of this paper is to define and to analyze the theoretical contact forces that appear in a sprocket - silent chain joint. The contact force between the links and the teeth flanks of the sprocket can be considered as a reaction to the axial for
Externí odkaz:
https://doaj.org/article/fd9c743cd5b44255ae03c0a5fa3dc177
Publikováno v:
Annals of the Oradea University: Fascicle Management and Technological Engineering, Vol XXIII (XIII) (2014)
The friction complexity between guide and chain is generated by a large number of factors acting simultaneously, of which wear has a significant share. During transmission functioning, guide and chain are subjected to normal forces in their contact s
Externí odkaz:
https://doaj.org/article/b7e93ebd04bb45f5b3a014a70ee746f0
Autor:
VELICU Radu, LATES Mihai
Publikováno v:
Annals of the Oradea University: Fascicle Management and Technological Engineering, Vol XXIII (XIII) (2014)
Photovoltaic (PV) solar to electric power conversion efficiency can be improved by using dual axes solar tracking systems which allow positioning of the PV platform perpendicular on the sun rays. An azimuthal tracker has two independent rotational mo
Externí odkaz:
https://doaj.org/article/a6628dcfe03544a89661c4e802c46d66