Presentation on theme: "CRANKSHAFT AND OIL FILM JOURNAL BEARING"— Presentation transcript:
1 CRANKSHAFT AND OIL FILM JOURNAL BEARING ANISH GANESH
2 OBJECTIVES To Introduce the topics of: Crankshaft Oil Film Bearing JournalOperation of the mechanismProblems of the Mechanism
3 CRANKSHAFTThe crank shaft turns the piston's up and down motion into circular motionThis provides effective torque at the crankshaft's endThe material of the crankshaft depends on the load it has to bear
4 OIL FILM JOURNAL BEARING Thin layer of lubricant between parts, preventing metal-to-metal contact.The type of bearing used depends upon the load on the bearing:low load: soft bearinghigh load: hard bearing
5 OPERATION OF THE MECHANISM Oil is pumped in to the crankshaft bearing through the oil inlet and forms a film around the shaftThis prevents the contact between the crankshaft and the bearing case
6 PROBLEMS WITH THE MECHANISM Cavitation Erosion: Erosion on the bearing surface caused by:Heat, pressure, chemical attack, abrasion and loss of lubrication.Misalignment of the crankshaft with in respect to the crankcase and the oil film bearing.