A disassembly-free method for evaluation of spiral bevel gear assembly

Jedliński, Łukasz; Jonak, Józef

doi:10.1016/j.ymssp.2016.11.005

Cited by 28 publications

(23 citation statements)

References 16 publications

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“…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.…”

Section: Introductionmentioning

confidence: 99%

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

2019

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In this paper, exploratory studies on the application of fibre-reinforced polymer composites in the construction of gearbox housing elements that are used for transport means, as an alternative to traditionally used materials, were undertaken. Composite materials with three types of reinforcement were used: a glass-chopped strand mat, glass fabric, and carbon fabric. The manufactured elements were subjected to weight assessment and vibroactivity tests, including the recording of vibration and noise. The obtained results were compared to the values recorded for housings made of steel. It has been found that composite housings, while maintaining geometric similarity, are characterised by at least 60% lower weight compared to steel housings. It has been shown that in the frequency range below 1 kHz, composite housings are characterised by the presence of resonant frequencies with higher amplitudes than steel housings. At higher frequency ranges—above 1 kHz—composite housings had a lower vibroactivity level than steel housing. They allowed a significant reduction in the level of vibration and noise in this frequency range. The results obtained indicate that composite gearbox housings can be a good alternative to steel-based solutions.

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Section: Introductionmentioning

confidence: 99%

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

2019

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“…In the case of bearings, pitting on the bearing elements or cracks in the race or balls can be encountered. Research in this area was carried out, among others, by authors of the papers [ 15 , 43 , 44 , 45 , 46 , 47 , 48 , 49 , 50 , 51 , 52 , 53 , 54 , 55 , 56 , 57 , 58 , 59 , 60 ]. It is possible that the above-mentioned changes in the condition of the elements of gearboxes will not cause any symptoms which are easily detectable in their initial stages by the users or service technicians of the means of transport.…”

Section: Introductionmentioning

confidence: 99%

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

Figlus

2019

Entropy

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The paper presents a method of processing vibration signals which was designed to detect damage to wheels of gearboxes for means of transport. This method uses entropy calculation, and multi-stage filtering calculated by means of digital filters and the Walsh–Hadamard transform to process signals. The presented method enables the extraction of vibration symptoms, which are symptoms of gear damage, from a complex vibration signal of a gearbox. The combination of multi-stage filtering and entropy enables the elimination of fast-changing vibration impulses, which interfere with the damage diagnosis process, and make it possible to obtain a synthetic signal that provides information about the state of the gearing. The paper demonstrates the usefulness of the developed method in the diagnosis of a gearbox in which two types of gearing damage were simulated: tooth chipping and damage to the working surface of the teeth. The research shows that the application of the proposed method of vibration of signal processing enables observation of the qualitative and quantitative changes in the entropy signal after denoising, which are unambiguous symptoms of the diagnosed damage.

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“…Gear transmission is an important mechanical transmission mechanism and is widely used in various industrial fields [1]. Carburization is important in ensuring wear resistance and bending resistance during high speed and overloading [2,3].…”

Section: Introductionmentioning

confidence: 99%

Meshing Simulation and Strength Calculation of a Carburized Gear Pair

Li¹,

Zhang²,

Wnag³

2017

Int. j. simul. model.

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The material in the carburized layer of a carburized gear is nonlinear. However, no systematic theory and method is available to analyse the strength of nonlinear materials; thus, calculating the exact strength of carburized gears is difficult. The traditional method of calculating the strength of carburized gears considered the material as uniform, which is susceptible to make errors. To address this problem, a hierarchical simulation method was proposed to calculate the strength of carburized gears. The strength calculation principle of carburized gears was first analysed. Then, a solid modelling method of carburized gears was presented based on the extraction technology of the layered homogeneous material. Finally, the meshing process of carburized gears was simulated, and the distribution and variation laws of the root, contact, and shear stresses during the meshing process were determined accurately. Results show that the shear stress of carburized gears initially increases and then decreases along with depth direction, and the maximum value appears in the surface below. However, the shear stress of non-carburized gears decreases linearly. The equivalent stress of the two kinds of gears decreases linearly with depth direction, whereas the decreasing amplitude of the carburized gears is larger than that of the non-carburized gears. A significant error in the calculation of the strength of carburized gears can be clearly observed using the traditional method. By selecting the appropriate parameters, the method proposed in this study can be used to simulate the meshing process of the carburized gear pair and calculate its strength accurately.

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A disassembly-free method for evaluation of spiral bevel gear assembly

Cited by 28 publications

References 16 publications

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

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

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

Meshing Simulation and Strength Calculation of a Carburized Gear Pair

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