Investigation of Gearbox Vibroactivity with the Use of Vibration and Acoustic Pressure Start-Up Characteristics

Abstract

This article presents the results of investigating the influence of tooth contact ratio in helical cylindrical gears on vibroactivity of the gearbox. Based on the measurements carried out on a laboratory test stand, time-domain and frequency-domain start-up characteristics of vibrations and acoustic pressure were determined, and vibroactivity was assessed for a gearbox in which 4 pairs of gears were successively mounted with different face contact ratios equal to, respectively, ε β =1,001; 1,318; 1,574; 2,636.

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

“…This stand (Figure 1) is equipped with a gear and allows experiments to be carried out, among others, with the use of various gearbox housing design solutions. Examples of results of research conducted on the stand were published in papers [35,37,45]. The upper part of the gearbox housing is an interchangeable element in this study.…”

“…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.…”

Analysis of the impact of oil viscosity on the vibroacoustic signal of a planetary gearbox operating at variable load

“…The type of lubricating oil has a significant impact on the efficiency [2]. On the other hand, the lubrication method affects the capacity and dynamic properties [3][4] [5] which are closely related to the vibroactivity [6] [7] [8]. This leads to the conclusion that the lubrication method affects the vibroacoustic signal of a gearbox.…”

A Method for Diagnosing Gearboxes of Means of Transport Using Multi-Stage Filtering and Entropy

“…Vibration signals of gearboxes of propulsion systems contain, first of all, characteristic information about the operation of the gears and the shaft bearings, and the main reason for the occurrence of vibrations are changes in the stiffness of the interacting elements, as well as changes in their technical condition. These signals are also modulated by signals containing information about the interaction and changes in the technical condition of other elements of the propulsion system [ 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 ]. This makes the vibration signal of gearboxes highly complex and often difficult to interpret.…”

“…The most popular methods for diagnosis include recording vibration signals and then processing them in search of symptoms of a change in the technical condition. Contact methods, e.g., with piezoelectric transducers [ 4 , 5 , 7 , 14 , 15 , 24 , 25 , 26 , 27 , 28 , 29 , 35 , 45 , 47 , 56 ], and non-contact methods with laser vibrometers [ 7 , 14 , 15 , 36 ] are used for recording. The latter are used for measurements in hard-to-reach places and enable measurements of rotating shafts.…”