High efficiency gears synthesis by avoid the interferences

Main Article Content

Florian Ion Tiberiu Petrescu
Relly Victoria Virgil Petrescu


The paper presents an original method to determine the efficiency of the gear, the forces of the gearing, the velocities and the powers. It is analyzing the influence of a few parameters concerning gear efficiency.These parameters are:z1 - the number of teeth for the primary wheel of gear; z2 - the number of teeth of the secondary wheel of gear; alpha0 - the normal pressure angle on the divided circle; beta - the inclination angle. With the relations presented in this paper, it can synthesize the gear’s mechanisms. Today, the gears are present everywhere, in the mechanical’s world (In vehicle’s industries, in electronics and electro-technique equipments, in energetically industries, etc). Optimizing this mechanism (the gears mechanism), we can improve the functionality of the transmissions with gears. At the gear mechanisms an important problem is the interference of the teeth. To avoid the interference between teeth, we must know the minimum number of teeth of the driving wheel, in function of the pressure angle (normal on the pitch circle, alpha0), in function of the tooth inclination angle (beta), and in function of the transmission ratio (i).


Download data is not yet available.


Metrics Loading ...

Article Details

Author Biography

Florian Ion Tiberiu Petrescu, Bucharest Polytechnic University

Ph.D. Eng. Florian Ion T. PETRESCU

Senior Lecturer at UPB (Bucharest Polytechnic University), Theory of Mechanisms and Robots department,

Date of birth: March.28.1958; Higher education: Polytechnic University of Bucharest, Faculty of Transport, Road Vehicles Department, graduated in 1982, with overall average 9.63;

Doctoral Thesis: "Theoretical and Applied Contributions About the Dynamic of Planar Mechanisms with Superior Joints".

Expert in: Industrial Design, Mechanical Design, Engines Design, Mechanical Transmissions, Dynamics, Vibrations, Mechanisms, Machines, Robots.


Member ARoTMM, IFToMM, SIAR, FISITA, SRR, AGIR. Member of Board of SRRB (Romanian Society of Robotics).


LEI, X. A. O. (2011) Design and Analysis for High-speed Gear Coupling, Applied Mechanics and Materials journal, v. 86, p. 658-661.

LIN, C. A. O. (2011) The Design and Experiments of Oval Bevel Gear, Applied Mechanics and Materials journal, v. 86, p. 297-300.

MAROŞ, D. (1958) Cinematica roţilor dinţate. Editura Tehnică, Bucureşti.

LENI MATOS, B. M. (2011) A Comparison of the Delay Spread Obtained with Different Power Delay Profiles De-Noising Techniques, ENGEVISTA, v. 13, n. 2, p. 129-133. Available on: http://www.uff.br/engevista/seer/index.php/engevista/article/view/280

NOGUEIRA, O. C.; REAL, M. V. (2011) Estudo Comparativo De Motores Diesel Maritimos Atraves Da Analise De Lubrificantes Usados e Engehharia De Confiabilidade, ENGEVISTA, v. 13, n. 3, p. 244-254. Available on: http://www.uff.br/engevista/seer/index.php/engevista/article/view/300

OLIVEIRA, M. M. P.; LIMA, F. R. (2003) Analogias Entre o Desenho Instrumental e o Dedenho Computacional, in ENGEVISTA, v. 5, n. 2, Available on: http://www.uff.br/engevista/seer/index.php/engevista/article/view/108

PELECUDI, C. H. R.; MAROS, D.; MERTICARU, V.; PANDREA, N.; SIMIONESCU, I. (1985) Mecanisme. E.D.P., Bucureşti.

PETRESCU, V.; PETRESCU, I. (2002) Randamentul cuplei superioare de la angrenajele cu roţi dinţate cu axe fixe, In: The Proceedings of 7th National Symposium PRASIC, Braşov, v. I, p. 333-338.

PETRESCU, R.; PETRESCU, F. (2003) The gear synthesis with the best efficiency, In: The Proceedings of ESFA’03, Bucharest, v. 2, p. 63-70.

PETRESCU R. V.; PETRESCU F. I.; POPESCU N. (2007) Determining Gear Efficiency, In Gear Solutions magazine, USA, p. 19-28, March. Available on: http://www.gearsolutions.com/media//uploads/assets//PDF/Magazines/GearSolutions0307.pdf

PETRESCU, F. I. (2012) Teoria mecanismelor – Curs si aplicatii (editia a doua), Create Space publisher, USA, September, ISBN 978-1-4792-9362-9, 284 pages, Romanian version. Available on: http://www.amazon.com/Teoria-Mecanismelor-Curs-aplicatii-Romanian/dp/1479293628

REY G. G. (2013) Influencia de la lubricacion en la eficiencia de engranajes de tornillo sinfin, Ingineria Mecanica journal, ISSN 1815-5944, v. 16, n. 1, p. 13-21. Available on: http://www.redalyc.org/articulo.oa?id=225125743002

STOICA, I. A. (1977) Interferenţa roţilor dinţate. Editura DACIA, Cluj-Napoca.

Most read articles by the same author(s)

1 2 3 > >>