Influence of the Teeth Number on the Gear Module Value and Load Capacity of Gear Pair in Universal Helical Gear Drives

Abstract

Abstract:The basic parameters of the universal gear drives, except the axis height, are not defined by the standard, so the manufacturers of universal gear reducers can define them in their way. Most of the manufacturers followed the parameter values of universal gear reducers of leading world producers in order to ensure their interchangeability and the better positioning of their gear units at the market. This paper deals with the analysis of the influence of the gear pair teeth number on the size of the module, as well as on the load carrying capacity of single-stage universal gear units. For defined gear ratio values, different combinations of teeth number of pinion and driven gear were selected. Further, it was made calculation of the basic geometric dimensions of the gear pair, as well as the load capacity. ARTICLE HISTORY

The Influence of the Bearing Lifetime on the Performance of Universal Gear Drives with High Gear Ratio Values

“…If load carrying capacities of single stage gear reducers are observed (Table 1), increasing the speed of output gear, i.e. reducing the value of the gear ratio evidently affects the increasing the load carrying capacity of the gear transmission at the beginning, but then its value stagnates [13,14]. However, if the load capacity of single-stage gear units is considered, it is evident that the load capacities (Tables 2, 3 and 4) are in decreasing with increasing the speeds, although the gears could be able to transmit a higher torque in these cases.…”

“…This reducing the capacity is due to the bearings are not able to carry so much loads [15][16][17][18][19][20]. It can be also noticed that load capacity is reduced for low speeds (high transmission values), but it is a consequence of using smaller module to enable production of small pinions which enable high transmission values [11,13]. If the analyzed gear transmissions are considered, it is evident that the maximum values of the load capacity are obtained for the gear ratio about 3.3.…”

“…An overview of the load carrying capacities values of the gear pairs within a single stage gear reducer[13].…”