Different Selection Procedures of Universal Worm Gear Drives

Kuzmanović, Siniša; Rackov, Мilan; Knežević, Ivan; Vereš, Miroslav

doi:10.24867/md.9.2017.2.51-56

Cited by 4 publications

(4 citation statements)

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“…In addition to increasing the bearing capacity, they also try to increase the highest values of gear ratios, by the same such interventions, and above all by reducing the number of teeth of the first gear (usually to 8) in order to enable the offer of lower (cheaper) gears. Today, single-stage gear reducers are made with gear ratios of up to 15, two-stage and over 80, and three-stage and over 300 [2]. These values, compared to thirty years ago, are three times higher, which indicates the intensive development of these gear reduces.…”

Section: Introductionmentioning

confidence: 99%

The Results of Changing the Current Solution Concept of Universal Motor Gear Reducers with Helical Gears

et al. 2021

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By analysing and comparing the existing solutions of universal gear reducers with helical gears of the leading manufacturers, it can be noticed the effort to increase the load capacity of the gear reducer within the same axis height. In this way, the manufacturers can offer smaller (cheaper) gear reducers, as well as to simultaneously increase the values of the largest gear ratios. This concept enables the offer of lower-stage (cheaper) gear reducers with higher gear ratios in certain segments of gear ratios. By these efforts, it is reached the maximum, but the further increase is possible only by changing the current concept of universal gear drives. Within this paper, it is given an overview and analysis of one of the possible new conceptual solutions of modern universal motor gear reducer.

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Section: Introductionmentioning

confidence: 99%

The Results of Changing the Current Solution Concept of Universal Motor Gear Reducers with Helical Gears

et al. 2021

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“…Changing of gear ratio causes the changing of speed of shaft and bearings. In such a way, it consequently changes the operating life of the bearings [6,7]. Since optimal operating life of the bearing is usually adopted as 10,000 hours (five years of operating, with fifty working weeks in a year and forty working hours per a week), the bearing should be calculated in that way to provide expected lifetime for all, or at most, gear ratio values [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2019

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The problem of defining the load (nominal torque on the output shaft - T2N) of universal gear drives depending on the size of the gear ratio is analysed in this paper. It is logical that the load capacity of gear drive depends on the weakest gear component. Since the gears are the most expensive components of gear unit, it tends to maximize their performance. However, for low gear ratio, i.e. for high speeds, the bearings often limit their load capacity since the same bearings are used in all transmission ratios because it is not practiced to oversize the bearings at low speeds. Nowadays, when high values of gear ratio are used, it is interesting to consider the dependence of the nominal torque at the output regarding to gear ratio and operating life of the unit.

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“…These interventions of leading gear reducer manufacturers improved their position at the market, but very soon smaller manufacturers have done the same thing. However, there is some reduction of competition at the market since small manufacturers were not be able to financially follow the interventions of major manufacturers, mainly due to the high cost of producing special casting tools [11,12].…”

Section: Problem Descriptionmentioning

confidence: 99%

Analysis of justification for applying two gear sets within the universal gear reducers

et al. 2017

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Abstract. In the area of universal gear reducers, standard does not prescribe relations between load capacity, gear ratios and axis heights. Therefore, larger load capacity of some gear reducers manufacturers has advantage for lower gear ratio and, vice versa, smaller load capacity of the gearbox achieves higher values of gear ratio. However, there are some manufacturers who produce gear reducers with smaller or larger load capacity for higher or lower gear ratio, within the same axis height. This paper deals with analysis of justification of applying two gear sets, especially in the case when socalled intermediate sizes of gear reducer are not used.

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Different Selection Procedures of Universal Worm Gear Drives

Cited by 4 publications

References 0 publications

The Results of Changing the Current Solution Concept of Universal Motor Gear Reducers with Helical Gears

The Results of Changing the Current Solution Concept of Universal Motor Gear Reducers with Helical Gears

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

Analysis of justification for applying two gear sets within the universal gear reducers

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