The Effect of Materials on the Efficiency of the Spiroid Gearing

Abstract

The contribution deals with is the material selection for spiroid gear. The combination of the softer material of one wheel with the harder material of the other wheel (or gear worm) is used for the trains of gears. The measurements were executed on the measurement stand comprising the machine aggregate with the spiroid drive. In Stage 1 of measurement, the spiroid gear was made of the steel gear worm and of the bronze wheel, in Stage 2 of measurements, it was made of the steel gear worm and of the plastic wheel. The efficiency was evaluated for various levels of the load moment, lubrication and material type used.

The Impact of Lubricant Viscosity and Materials on Power Losses and Efficiency of Worm Gearbox

“…Power losses in gear transmission vary extensively, which depends on many influencing factors, the most important of which are the type of material of meshed gears, geometry of worm pair, gear velocity, type and viscosity of lubricating oil, load, shape of the worm, operating temperature, etc. [10][11][12][13][14][15][16][17]. Based on DIN3996 standard [18], power losses in worm gearbox can be divided into load-dependant losses (mechanical losses) and load-independent losses.…”