Resource Assessment of Spiroid Gears Under Variable Loading Conditions

Alexander Zaitsev,S Kudriavtcev,V Murgul

doi:10.1051/e3sconf/202015701007

Abstract

The brief analysis of reasons of failure of mechanisms and drives of lifting, construction, and road-building machines based on engagement drives, and worm-gear class drives, represented by contact destructions of active surfaces of cog-wheel cogs resulting in malfunctions, breakages, failures, such as wear and furrows, was carried out. The need to create a method for calculating the wear of spiroids with regard of variable loading mode and time was substantiated. The method developed allows, with regard of real modes of operation of handling machinery, equipment and machines, determine the wear intensity values and calculate the spiroid gear drive resource with regard of duration of action of diving torque values in accordance with the set variable loading schedule for lifting, construction, and road-building machines under the wear intensity of the spiroid wheel cog on values of driving torque on the spiroid gear drive output shaft, obtained from experiments.

Highlights

Due to the action of useful resistances, constant or variable in time in the process of operation, occurring on operating equipment, contact destructions of active surfaces of links, wear, furrows on cog side surfaces and fractures, which are the reason of failure of mechanisms of drives of lifting, construction, and road-building machines, form in cog engagements of power transmissions [1]
WhereTi /Tmax-relative driving torque values determined from the set variable loading schedule; wHEmax- specific calculated force in the engagement corresponding to the driving torque on the gear drive output shaft Тmax
3 Results and discussion Dependence of the wear intensity Jh of the spiroid sheel cogs on the values of the driving torque on the spiroid gear drive output shaft Тi was obtained from experiments, allowing to determine the wear intensity and calculate the resource of the mechanism spiroid gear drive with the set variable loading schedule

Summary

Introduction

Due to the action of useful resistances, constant or variable in time in the process of operation, occurring on operating equipment, contact destructions of active surfaces of links, wear, furrows on cog side surfaces and fractures, which are the reason of failure of mechanisms of drives of lifting, construction, and road-building machines, form in cog engagements of power transmissions [1]. This type of destruction is typical for quenched surfaces of cog-wheel cogs and is revealed by progressive pitting of material that may reach considerable size, and on work-hardened cog surfaces by flaking lager areas of metal pad [2]. This dependence Jh=F(Ti) allows finding wear intensity of the spiroid wheel cog for the corresponding driving torque values Ti of the set variable loading schedule

Research methods

17 Lubricating material

Results and discussion

Conclusions