The Impact of Non-Parallelism of Toothed Gear Shafts Axes and Method of Gear Fixing on Gearbox Components Vibrations

Abstract

The subject of the experimental research was a modified back-to-back test stand. During the test, the driven gear with a number of teeth z1=16 was fixed on stationary axis. The tested gearbox worked without load and the closing gearbox was dismantled to avoid any additional vibration and noise. A mechanical system was also used which, during the tests, allowed to change the position of the above mentioned stationary axis. Gear with number of teeth z1 was fixed on a stationary axis with the arrangement of two self-aligning ball bear-ings which prevented significant changes in the angular position of axis of gear in regard of stationary axis; or fixed on a stationary axis with the arrangement of one self-aligning ball bearing which allowed significant changes in the angular position of axis of gear in regard of stationary axis. On the basis of the conducted studies, it can be stated that only in some of the analyzed cases fixing of gear with the arrangement of one self-aligning ball bearing reduces the vibration of the gearbox elements.

Static Analysis of Selected Design Solutions for Weight-Reduced Gears

“…Gears are the most important element in the field of mechanical engineering especially for industry, automotive, and aviation, mainly in power transmission where variable load and speed are required to operate machines [1][2][3][4][5]. Straight gears, or cylindrical gears, are the most common type of gear because of the simplicity of design and manufacture, and because they are cost-effective and require less maintenance [2,[6][7][8].…”

An Analysis of Polymer Gear Wear in a Spur Gear Train Made Using FDM and FFF Methods Based on Tooth Surface Topography Assessment

“…Since studies on gears and gear trains are most frequently performed with reference to gears manufactured using conventional methods from metal alloys, they have been widely discussed in the literature. Most recent studies focus mainly on gear trains of advanced structures and the optimisation of their designs in terms of strength by means of kinematic models [ 3 , 4 , 5 ], dynamic models [ 6 , 7 , 8 ] and diagnostics [ 9 , 10 , 11 , 12 , 13 , 14 ]. There are also publications providing an overview of gear design tools with guidelines and practical examples of gear design [ 15 ].…”

Impact of Application of Selected Composite Materials on the Weight and Vibroactivity of the Upper Gearbox Housing

“…Studies conducted on the vibroactivity of gearboxes so far have focused on the possibility of reducing vibration and noise levels [31,32,33,34], while allowing a small increase in weight [35,36]. It has been proven that the selection of specific geometrical features of the gearing [33,37,38,39] and the additional ribbing of the housing reduces the vibroactivity of the gearbox [34,36,40,41,42,43,44], but with a slightly increase in weight [36,45]. However, such an approach in the construction of e.g., motor vehicles is not advisable, as it directly contributes to increases in fuel consumption.…”