Authors: A.V. Zaitsev

Title of the article: To the question of calculation of spiroid transmis-sions with variable loading mode

Year: 2019, Issue: 1, Pages: 14-21

Branch of knowledge: Mechanical-engineering technology

Index UDK: 621.833.3

DOI: 10.26730/1999-4125-2019-1-14-21

Abstract: A brief analysis of the causes of failure of the mechanisms and drives of lifting, construction, road machines based on gear transmissions, as well as on worm class gearing, i.e. contact destruction of the active surfaces of gear teeth, resulting in malfunctions, failures in the form of wear and scuffing. The study presents a cyclogram that describes the mode of operation of the gear pair taking into account the effect of the maximum load on the contact endurance and on the endurance of the teeth at bending and that is used in strength calculations of spur and helical gears. The necessity of creating a method for calculating the wear of spiroid gears, taking into account the variable loading mode and loading time, is substantiated based on the analysis of loading schedules of mechanisms and drives of hoisting-and-transport machines and equipment where this type of gear is used, in particular, in the drive of stop valves mechanisms, the drive of screw horizontal conveyor, in the cable assembly mechanism of the electric loader, in the drive of the traction winch of the packing crane UK-25 / 9-18 for dragging the pacts of the rail and sleepers grid. The developed method allows, taking into account the actual operating modes of hoisting-and-transport machines, equipment and mechanisms for experimentally obtained dependence of the wear rate of the teeth of the spiroid wheel on the torque values on the output shaft of the spiroid gearbox, to determine the values of wear intensity and to calculate the service life of the spiroid gearbox taking into consideration the duration of the torque values in accordance with the established schedule of variable loading mechanisms for lifting, construction, and road cars.

Key words: wear wear rate gearing service life spiroid gear variable loading graph

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