Design of loboid gear pairs using involute discretization

Vasilios Spitas, Christos Spitas

Research output: Chapter in Book/Conference proceedingConference contributionpeer-review


Loboid gears are used in rotary pump applications mainly in positive displacement pneumatic compressors (i.e. Roots blowers) in which high volumetric capacity and smooth running are of major importance. This paper approaches the problem of numerically defining the meshing surfaces of such loboid gears using the newly developed theory of involute discretization. According to this approach, every gear tooth of any form can be discretized in infinitesimal involute segments therefore rendering the determination of the path of contact and the geometry of the meshing teeth of the conjugate gears easy and straightforward, using the well-known properties of the involute. The achieved savings in programming time and effort are considerable compared to the standard Theory of Gearing and other form-specific gear tooth geometrical formulae.

Original languageEnglish
Title of host publicationPower Transmissions - Proceedings of the 4th International Conference
EditorsGeorge Dobre
PublisherSpringer Netherlands
Number of pages9
ISBN (Print)9789400765573
Publication statusPublished - 2013
Externally publishedYes
Event4th International Conference on Power Transmissions, PT 2012 - Sinaia, Romania
Duration: 20 Jun 201223 Jun 2012

Publication series

NameMechanisms and Machine Science
ISSN (Print)2211-0984
ISSN (Electronic)2211-0992


Conference4th International Conference on Power Transmissions, PT 2012


  • Cycloidal gears
  • Discretization
  • Involute
  • Loboid gears
  • Roots blowers

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering


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