A Study of Pin-Wheel Globoidal Worm Gearing : 3rd Report, Lubrication between Pin and Arc-groove

Abstract

The new globoidal worm gear which consists of a wheel having pins and a worm having an arc-shaped groove has been proposed in the previous papers. The efficiency of the worm gear depends upon the oil film formed between the pin and the groove. The oil film formation and scoring resistance between a hardened steel pin of 12 mm dia and an arc-grooved roller of phosphor bronze are investigated. The formation of the film is measured by the electric discharge method and is analysed using FFT. Seven different profiles of the groove are examined and the optimal profile for high efficiency and high scoring resistance is chosen.