THE TRANSVERSE CONTACT RATIO OF WORM （蠕虫的横向重合度）.pdf

th 5 INTERNATIONAL MULTIDISCIPLINARY CONFERENCE THE TRANSVERSE CONTACT RATIO OF WORM GEARINGS 1 2 Slavko PAVLENKO , Ján PAŠKO 1,2 Ing., Ph D, Department of Mechanics and Machine Parts, the Faculty of Manufacturing Technologies, TU of Košice with a seat in Prešov, Štúrova 31, 080 01 Prešov, tel.: 00 421 7723 012, fax 00 421 7733 453, ABSTRACT: The article presents the description of the method applied to the determination of the mesh duration factor of worm gearings which is rather difficult to define when compared to that of the spur gearings. A numerical method has been used to determine the transverse contact ratio for involute worm. The above mentioned factor can be used for a dynamic calculation of drives with worm-gear speed reducers. Key words: gearings, worm gearings, the transverse contact ratio, involute worm 1. INTRODUCTION In order to increase the reliability, to extend the life and to increase the loading capacity of machines, we encounter the requirement how to secure the continuity of their operation and to reduce the unfavourable dynamic effects. An optimally designed drive requires the evaluation of its condition and the occurance tendency of resonance areas or their possible restriction to acceptable amount. With the dynamic analysis of drives, which worm gearings are parts of, it is necessary to determine the toughness parameters of its individual components. The transverse contact ratio of gearings determines the way in which the multi-paired teeth meshes alternate that enables the determination of the way of these drive elements compliance fluctuation. The results obtained can be used for designing and manufacturing of