ISSN 2466-4677; e-ISSN 2466-4847
SCImago Journal Rank
2023: SJR=0.19
CWTS Journal Indicators
2023: SNIP=0.57
INFLUENCE OF ALTERNATING TEMPERATURE LEVELS ON THE WEAR BEHAVIOR OF RADIAL LIP SEALS: TEST RIG DESIGN AND WEAR ANALYSIS
Authors:
Lukas Merkle1
, Matthias Baumann, Frank Bauer1
Received: 05.08.2021.
Accepted: 10.09.2021.
Available: 30.09.2021.
Abstract:
Radial lip seals are a common seal type for various industrial applications. In retarder breaking systems for commercial vehicles, radial lip seals are exposed to very fast changing oil sump temperatures. Due to increasing demands, the elastomer seals are increasingly failing premature in such applications. It is assumed that this is caused in particular by the very high temperature gradients, that result from the fact that a lot of braking power is dissipated within a short time. This is the case, for example, when braking while driving downhill with heavy loads. Since the temperature gradient is of minor importance in many applications, there are no publications regarding the specific influence of high temperature gradients on the function of radial shaft seals. Therefore, a test rig with advanced heating and cooling capacities is developed.
A comprehensive test series is carried out, with the main focus on the influence of high temperature gradients on the wear behavior of the seals. Test results show, that different temperature levels lead to a significant change of the wear behavior. Additionally, fast changing temperatures are adding additional tribological stress to the sealing system.
Keywords:
Sealing technology, radial lip seal, wear, alternating temperature, failure analysis, test rig design, lifetime prediction
References:
[1] Deutsches Institut für Normung e.V., RadialWellendichtringe, 1996. [in German]
[2] Deutsches Institut für Normung e.V., RadialWellendichtringe für Kraftfahrzeuge – Begriffe; Maßbuchstaben; zulässige Abweichungen; Radialkraft, 1984. [in German]
[3] F. Bauer, Federvorgespannte – Elastomer – Radial – Wellendichtungen. Springer Fachmedien, Wiesbaden, 2021. [in German] https://doi.org/10.1007/978-3-658-32922-8
[4] F. Bauer, Tribologie. Springer Fachmedien Wiesbaden, Wiesbaden, 2021. [in German] https://doi.org/10.1007/978-3-658-32920-4
[5] Deutsches Institut für Normung e.V., RadialWellendichtringe für Kraftfahrzeuge – Funktionsprüfung; Prüfstand und Prüfbedingungen, 1984. [in German]
[6] Deutsches Institut für Normung e.V., RadialWellendichtringe für Kraftfahrzeuge – Funktionsprüfung; Leckage-Beurteilung, 1984. [in German]
[7] A. Hüttinger, J. Hermes, M. Wöppermann, E. Prem, Neues Prüfverfahren für dynamische Dichtungen von Getriebemotoren, in: Friedrich Berger, Sandra Kiefer (Eds.), Jahrb. Dichtungstechnik 2016. ISGATEC GmbH, Mannheim, 2015: pp.482-494. [in German]
[8] Freudenberg Sealing Technologies, Dynamic oil compatibility tests for Freudenberg radial shaft seals to release the usage in FLENDER-gear units applications (Table T 7300), 2020.
[9] Sew-Eurodrive GmbH & Co KG, Prüfvorschrift 97 118 04 15 63190052.04 Statische und dynamische Prüfungen von Radialwellendichtringen (RWDR), 2020.
[10] A. Eipper, Einfluss transienter Betriebsbedingungen auf den RWDR im System Radial-Wellendichtung (Ph.D. Thesis). Institute of Machine Components, University of Stuttgart, Stuttgart, 2018. [in German] http://dx.doi.org/10.18419/opus-9986
[11] A. Eipper, F. Bauer, W. Haas, Damaging process of radial lip seals considering variable temperature and runtime, in: Proc. 13th EDF/Pprime Work., 2014.
[12] T. Engelke, Einfluss der Elastomer-Schmierstoff – Kombination auf das Betriebsverhalten von Radialwellendichtringen, Universität Hannover, 2011.
[13] L. Schöneweiß, Design of a Test Rig for Temperature Tests on Radial Shaft Seals, (Unpublished student thesis). Institute of Machine Components, University of Stuttgart, Stuttgart, 2020. [in German]
[14] J. Grün, S. Feldmeth, F. Bauer, Wear on radial lip seals: a numerical study of the influence on the sealing mechanism. Wear, 476, 2021:203674. https://doi.org/10.1016/j.wear.2021.203674
[15] F. Guo, X. Jia, W. Longke, R.F. Salant, Y. Wang, The effect of wear on the performance of a rotary lip seal. Journal of Tribology, 136, 2014:1-8. https://doi.org/10.1115/1.4027623
[16] M. Baumann, F. Bauer, Moderne visuelle Untersuchungsmethoden für die Verschleißanalyse am Beispiel RadialWellendichtring, in: Proc. 20th Int. Seal. Conf., Fachverband Fluidtechnik im VDMA e.V, Frankfurt am Main, 2018: pp. 93–104. [in German]
[17] M. Baumann, Abdichtung drallbehafteter Dichtungsgegenlaufflächen – Messung, Analyse, Bewertung und Grenzen (Ph.D. Thesis). Institute of Machine Components, University of Stuttgart, Stuttgart, 2017. [in German]
http://dx.doi.org/10.18419/opus-9061
[18] M. Schulz, M. Hagmayer, M. Baumann, F. Bauer, Analysis of Fluid Flow in the Sealing Gap of Radial Shaft Seals and Elastic Deformation of the Sealing Surface. Journal of Tribology, 143 (12), 2021: 1-19. https://doi.org/10.1115/1.4050139
[19] M. Baumann, F. Bauer, W. Haas, Ra, Rz und Rmax von Dichtungsgegenlaufflächen — der Weisheit letzter Schluss?, in: Friedrich Berger, Sandra Kiefer (Eds.), Jahrb. Dichtungstechnik 2016. ISGATEC GmbH, Mannheim, 2015, pp. 295-309. [in German]
[20] Technical Manual, Freudenberg Sealing Technologies GmbH & Co. KG, Weinheim Germany, 2015.
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[22] M. Jaunich, Tieftemperaturverhalten von Elastomeren im Dichtungseinsatz (Ph.D. Thesis). BAM Bundesanstalt für Materialforschung und – prüfung, Technische Universität Berlin, Berlin, 2011. [in German]
[23] L. Merkle, M. Baumann, F. Bauer, Best Practice for Individual Test Design Based on Given Application Parameters and Failure Analysis on Radial Shaft Seals, in: 61. Tribol. 2020 Reibung, Schmierung Und Verschleiß Forsch. Und Prakt. Anwendungen. GfT Gesellschaft für Tribologie e.V., Jülich, 2020.
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http://dx.doi.org/10.18419/opus-8975
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License (CC BY-NC 4.0)
How to Cite
L. Merkle, M. Baumann, F. Bauer, Influence of Alternating Temperature Levels on the Wear Behavior of Radial Lip Seals: Test Rig Design and Wear Analysis. Applied Engineering Letters, 6(3), 2021: 111–123.
https://doi.org/10.18485/aeletters.2021.6.3.4
More Citation Formats
Merkle, L., Baumann, M., & Bauer, F. (2021). Influence of Alternating Temperature Levels on the Wear Behavior of Radial Lip Seals: Test Rig Design and Wear Analysis. Applied Engineering Letters, 6(3), 111–123.
https://doi.org/10.18485/aeletters.2021.6.3.4
Merkle, Lukas, et al. “Influence of Alternating Temperature Levels on the Wear Behavior of Radial Lip Seals: Test Rig Design and Wear Analysis.” Applied Engineering Letters, vol. 6, no. 3, 2021, pp. 111–23,
https://doi.org/10.18485/aeletters.2021.6.3.4.
Merkle, Lukas, Matthias Baumann, and Frank Bauer. 2021. “Influence of Alternating Temperature Levels on the Wear Behavior of Radial Lip Seals: Test Rig Design and Wear Analysis.” Applied Engineering Letters 6 (3): 111–23.
https://doi.org/10.18485/aeletters.2021.6.3.4.
Merkle, L., Baumann, M. and Bauer, F. (2021). Influence of Alternating Temperature Levels on the Wear Behavior of Radial Lip Seals: Test Rig Design and Wear Analysis. Applied Engineering Letters, 6(3), pp.111–123. doi: 10.18485/aeletters.2021.6.3.4.
SCImago Journal Rank
2023: SJR=0.19
CWTS Journal Indicators
2023: SNIP=0.57
INFLUENCE OF ALTERNATING TEMPERATURE LEVELS ON THE WEAR BEHAVIOR OF RADIAL LIP SEALS: TEST RIG DESIGN AND WEAR ANALYSIS
Authors:
Lukas Merkle1
, Matthias Baumann, Frank Bauer1
Received: 05.08.2021.
Accepted: 10.09.2021.
Available: 30.09.2021.
Abstract:
Radial lip seals are a common seal type for various industrial applications. In retarder breaking systems for commercial vehicles, radial lip seals are exposed to very fast changing oil sump temperatures. Due to increasing demands, the elastomer seals are increasingly failing premature in such applications. It is assumed that this is caused in particular by the very high temperature gradients, that result from the fact that a lot of braking power is dissipated within a short time. This is the case, for example, when braking while driving downhill with heavy loads. Since the temperature gradient is of minor importance in many applications, there are no publications regarding the specific influence of high temperature gradients on the function of radial shaft seals. Therefore, a test rig with advanced heating and cooling capacities is developed.
A comprehensive test series is carried out, with the main focus on the influence of high temperature gradients on the wear behavior of the seals. Test results show, that different temperature levels lead to a significant change of the wear behavior. Additionally, fast changing temperatures are adding additional tribological stress to the sealing system.
Keywords:
Sealing technology, radial lip seal, wear, alternating temperature, failure analysis, test rig design, lifetime prediction
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License (CC BY-NC 4.0)