Electric impedance of rolling bearings - Consideration of unloaded rolling elements

Schirra, Tobias; Martin, Georg; Puchtler, Steffen; Kirchner, Eckhard

doi:10.1016/j.triboint.2021.106927

Cited by 32 publications

(45 citation statements)

References 11 publications

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“…For improving the calculation of the bearing load, Equation ( 2) is expanded for taking into account the capacity of unloaded rolling elements or the capacity of the undeformed area surrounding the Hertz'ian contact area of loaded rolling elements [36][37][38][39]. Schirra et al compare experimental results with calculated values [39].…”

Section: Sensory Utilizable Rolling Element Bearingmentioning

confidence: 99%

Sensory Utilizable Design Elements: Classifications, Applications and Challenges

et al. 2022

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The sensory acquisition of in situ data in technical systems is one of the key requirements set by ongoing digitalization. The sensory utilization of mechanical design elements is a step towards the accomplishment of this requirement. To set a common ground for further research in the context of sensory utilizable design elements, this paper reviews the current state of research in this topic. First, the aim, potentials and classification of sensory utilizable design elements are introduced. Next, examples of sensory utilizable design elements are presented. These examples are used to demonstrate the technical and methodical challenges that have to be addressed in order to establish sensory utilizable design elements as a solution for the requirements of digitalization.

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Section: Sensory Utilizable Rolling Element Bearingmentioning

confidence: 99%

Sensory Utilizable Design Elements: Classifications, Applications and Challenges

et al. 2022

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“…Recently, Martin et al [23,24] presented a quite novel smart bearing approach, in which the variation of electric impedance of the bearing is measured via an external electronic circuit and is used to identify the load applied and the angular speed. Some experimental results were obtained using a custom-built test rig, that allows testing four small-size bearings simultaneously, at a rotational speed up to 8000 rpm, with loads up to 40 kN per bearing, both in the radial and axial directions, independently.…”

Section: System Architecturementioning

confidence: 99%

Design of an Innovative Test Rig for Industrial Bearing Monitoring with Self-Balancing Layout

et al. 2022

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The remote prognosis and diagnosis of bearings can prevent industrial system failures, but the availability of realistic experimental data, being as close as possible to those detected in industrial applications, is essential to validate the monitoring algorithms. In this paper, an innovative bearing test rig architecture is presented, based on the novel concept of “self-contained box”. The monitoring activity is applicable to a set of four middle-sized bearings simultaneously, while undergoing the independent application of radial and axial loads in order to simulate the behavior of the real industrial machinery. The impact of actions on the platform and supports is mitigated by the so-called “self-contained box” layout, leading to self-balancing of actions within the rotor system. Moreover, the high modularity of this innovative layout allows installing various sized bearings, just changing mechanical adapters. This leads to a reduction of cost as well as of system down-time required to change bearings. The test rig is equipped with suitable instrumentation to develop effective procedures and tools for in- and out-monitoring of the system. An initial characterization of the healthy system is presented.

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“…for example, sensory rolling bearings, in which the electric capacitance of the lubrication film is used as a sensory effect. When analysing the effects of loaded and unloaded rolling contacts in a rolling bearing, as described by Schirra et al (2021), based on the analysis and modelling of electric damage effects, it turns out that the growth laws describing size dependencies will imply boundary conditions. From this point of view, the use of sensory rolling bearings can be considered as a wildcard when looking at robust design, due to the highly complex, empirical, model necessary to implement the sensory function, cf.…”

Section: /18mentioning

confidence: 99%

“…From this point of view, the use of sensory rolling bearings can be considered as a wildcard when looking at robust design, due to the highly complex, empirical, model necessary to implement the sensory function, cf. Schirra et al (2021).…”

Section: /18mentioning

confidence: 99%

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An approach for the quantitative description of uncertainty to support robust design in sensing technology

et al. 2021

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Sensing machine elements offer the potential to upgrade conventional machine elements by extending their primary function to be able to measure a quantity of interest at its point of origin in a technical system, the so-called in situ measurement. To ensure the functionality of these next generation machine elements, special attention must be paid to uncertainty in terms of modelling to be able to correctly evaluate the provided signal and obtain reliable information. Consequently, this contribution describes an approach to classify uncertainty in sensing technology, especially in SMEs, based on the amount of available information, which can be used as a point of departure to reduce the impact of occurring uncertainty to improve the robustness of the obtained signal. Starting from the understanding of uncertainty and the corresponding classification scheme as well as its linkage to robust design from the Collaborative Research Centre 805, a quantitative model is presented to determine the impact of uncertainty on a measuring signal. The applicability of the proposed approach is demonstrated using the example of a sensing timing belt by taking into account the uncertainty from the SME itself and also from the surrounding technical system.

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Electric impedance of rolling bearings - Consideration of unloaded rolling elements

Cited by 32 publications

References 11 publications

Sensory Utilizable Design Elements: Classifications, Applications and Challenges

Sensory Utilizable Design Elements: Classifications, Applications and Challenges

Design of an Innovative Test Rig for Industrial Bearing Monitoring with Self-Balancing Layout

An approach for the quantitative description of uncertainty to support robust design in sensing technology

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