Design and Development of a Test Rig for Embeddability Studies of Pb Free Engine Bearing Materials
Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Engine efficiency relies heavily upon low fiction and wear between bearings, crankshaft and connecting rod. Both crankshaft & bearing suffer damages from contaminant particles entering with lubricant. It is important to fully embed the contaminant particles into the bearing surface. Embeddability is considered to be one of the key soft properties of the bearings.Due to environmental legislations the conventional Pb containing engine bearings are continuously replaced by newly developed Pb free materials. Previous research work pertaining to embeddability focuses on the damages related to shaft only but does not take into account the bearing damages. Due to lack of standard embeddability test rigs, a dedicated test rig is designed and developed for the testing of various Pb free engine bearing materials. Post-test analysis of the bearing and shaft specimen are performed by shaft surface roughness measurement, bearing weight loss measurement, optical microscopy, SEM and EDX analysis of the bearing specimens, to validate the embeddability process and quantify any damage to the shaft. The results have shown that the newly developed test rig is able to simulate the embeddability process and embeddability behavior of different overlays can also be easily differentiated.
Place, publisher, year, edition, pages
2015. , 65 p.
IdentifiersURN: urn:nbn:se:ltu:diva-58774Local ID: f5652f35-7ceb-4709-8f72-414194624e07OAI: oai:DiVA.org:ltu-58774DiVA: diva2:1032162
Subject / course
Student thesis, at least 30 credits
Mechanical Engineering, master's level
Validerat; 20150917 (global_studentproject_submitter)2016-10-042016-10-04Bibliographically approved