Ferrographic analysis of failure process in a full-scale journal bearing

Akagaki, Tomoharu; Kato, K.

doi:10.1016/0043-1648(92)90123-p

Cited by 14 publications

(7 citation statements)

References 11 publications

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“…The works by Hirani et al [36] and Młynarczak [17] are exceptional in that respect. More common are failure analyses of white metal bearings such as in [37][38][39][40][41][42]. This stems from the fact that hydrodynamic bearings with white metal facing have been widely employed in the industry for many years.…”

Section: Origin and Purposementioning

confidence: 99%

Experimental Research on Insufficient Water Lubrication of Marine Stern Tube Journal Bearing with Elastic Polymer Bush

Barszczewska

2020

Polish Maritime Research

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Water-lubricated bearings with polymer bushes are steadily gaining popularity due to their advantages, including environmental friendliness, relatively simple construction and long-term operation. Nevertheless, in practice instances of damage to such bearings occur due to insufficient or absent flow of the lubricating agent. In this study, experimental tests established that elastic polymer bush bearing is capable of operating without excessive wear for a period of at least 60 minutes under conditions of marginal water flow and typical loads for stern tube journal bearings of small ships.

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Section: Origin and Purposementioning

confidence: 99%

Experimental Research on Insufficient Water Lubrication of Marine Stern Tube Journal Bearing with Elastic Polymer Bush

Barszczewska

2020

Polish Maritime Research

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“…8 In lubricated condition, oil starvation is found to be a direct cause of the seizure of journal bearing contacts. 9 As a result of lubricant starvation, metalto-metal contact would occur, causing high wear of the bearing surfaces due to severe ploughing, and wear debris plays a role in initiating seizure failure. Under normal supply of lubricants, seizure could also occur, for instance in thermoplastic bearings where the limiting product of pressure and velocity controls the onset of seizure.…”

Section: Introductionmentioning

confidence: 99%

Seizure behaviour of Pb-free engine bearing materials under dry condition

Gebretsadik

Hardell

Prakash

2017

Proceedings of the Institution of Mechanical Engineers, Part J:

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Due to new environmental regulations, Pb-free engine bearing materials are becoming more common and there is a need for studying their tribological performance. Under severe operating conditions, failure due to seizure can occur in engine bearings. In this work, seizure behaviour of different multi-layered engine bearing materials has been studied by using a block-on-ring test setup under dry condition. These materials included Al–Sn-based lining with no overlay, bronze lining with polyamide-imide-based overlay containing MoS2 and graphite, bronze lining with two overlays of Al–Sn-based and polyamide-imide-based material, bronze-based lining with Sn-based overlay and bismuth (Bi)-containing bronze with Sn-based overlay. The tests were performed by gradually increasing the load at a specific time interval and in a stepwise manner and at a constant speed under unidirectional dry sliding conditions. The test materials, counter surfaces and the wear debris were analysed using SEM with a view to understand the seizure mechanisms. Bronze-based lining with a polyamide-imide-based overlay containing MoS2 and graphite does not exhibit seizure up to a load of 475 N. For Al–Sn-based lining without overlay, seizure occurs at a relatively lower load of 125 N. The Al–Sn-based lining with no overlay shows higher friction and the polyamide-imide-based overlay containing MoS2 and graphite shows lower friction during the seizure test. In most cases, there is material transfer onto the test ring counter surface. Material transfer onto the counter surface either due to severe adhesion or wear debris adhered and smeared on it. Al–Sn-based lining and an exposed Al–Sn-based overlay show severe adhesion that causes seizure. On the other hand, exposed Pb containing lining and Bi containing lining seize due to mechanical interlocking caused by the adhered wear debris on both surfaces.

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“…One of the weak components of transoceanic ships is the bearing composed of white-metal liner and back-up steel, because the steel journal has a possibility of seizure to the white-metal liner under an unusual large bearing load or due to low viscosity oil, especially during the start or stop periods of ships [1,2]. Therefore, composite journal bearings are becoming more popular for marine applications because they eliminate the possibility of seizure between the bearing and journal.…”

Section: Introductionmentioning

confidence: 99%

The Sliding Friction of Hybrid Composite Journal Bearing Under Various Test Conditions

Kim

Hwang

et al. 2009

Tribol Lett

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Composite journal bearings are becoming more popular for marine applications because they eliminate the possibility of seizure to steel journals, which is a drawback of white-metal bearings. However, the reliability of composite bearings should be verified by various tests before its commercialization. In this study, hybrid composite journal bearings composed of carbon/phenolic and glass/epoxy laminated composites were manufactured and tested under various operating conditions and compared with whitemetal journal bearings. The friction coefficient of the hybrid composite journal bearing was similar to that of white-metal bearing under transient and hydrodynamic lubrication. However, the hybrid composite journal bearing could be operated up to 30 min under severe dry condition, whereas the white metal gets seizure to the steel journal during the bearing operation.

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Ferrographic analysis of failure process in a full-scale journal bearing

Cited by 14 publications

References 11 publications

Experimental Research on Insufficient Water Lubrication of Marine Stern Tube Journal Bearing with Elastic Polymer Bush

Experimental Research on Insufficient Water Lubrication of Marine Stern Tube Journal Bearing with Elastic Polymer Bush

Seizure behaviour of Pb-free engine bearing materials under dry condition

The Sliding Friction of Hybrid Composite Journal Bearing Under Various Test Conditions

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