Project

Testing of Bearing Materials for Large Two-stroke Marine Diesel Engines

Publisher

Supervisor

Location

Greater Copenhagen area

Fatigue mechanism of bearing lining material is not fully understood and the design limits with regards to minimum oil film thickness, max oil film pressure and oil film pressure gradient is not fully established. Large two-stroke journal bearings are not suitable for fatigue test due to the size, the low rotational speed and the complexity of such test-rig. The Disc Fatigue Test Rig (DTFR) is designed with the purpose to test white metal coatings under realistic bearing conditions, in a confined time-frame and to clarify some of the reasons and mechanisms for crack formation and growth in white metal lining due to fatigue.  The test-rig simulates a scale model of a thrust bearing. All parameters, such as bearing load, rotational speed, oil temperature is computer controlled to achieve good repeatability and a systematic approach to the experiments. Test performed on the test-rig shows good correlation on the fatigue cracks with those experienced on large two-stroke journal bearings. Our tests aims, for instance, to establish fatigue properties of standard white metal (HMO7) material, evaluate the influence of edge load and influence of bending stress in lining.

In collaboration with

MAN Energy Solutions A/S

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Contact

Company / Organization

DTU Mekanik

Name

Peder Klit

Position

Ingeniørdocent

Mail

klit@mek.dtu.dk

Supervisor info

MSc in Engineering, Mechanical Engineering

Supervisor

Peder Klit

ECTS credits

30 - 35

Type

MSc thesis

Must be completed

41524 Tribology

Technical University of Denmark

For almost two centuries DTU, Technical University of Denmark, has been dedicated to fulfilling the vision of H.C. Ørsted – the father of electromagnetism – who founded the university in 1829 to develop and create value using the natural sciences and the technical sciences to benefit society.


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