Presentation on theme: "CRANKSHAFT AND OIL FILM JOURNAL BEARING ANISH GANESH."— Presentation transcript:
CRANKSHAFT AND OIL FILM JOURNAL BEARING ANISH GANESH
OBJECTIVES To Introduce the topics of: ~Crankshaft ~Oil Film Bearing Journal ~Operation of the mechanism ~Problems of the Mechanism
CRANKSHAFT The crank shaft turns the piston's up and down motion into circular motion This provides effective torque at the crankshaft's end The material of the crankshaft depends on the load it has to bear
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 bearing ~high load: hard bearing
OPERATION OF THE MECHANISM Oil is pumped in to the crankshaft bearing through the oil inlet and forms a film around the shaft This prevents the contact between the crankshaft and the bearing case
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.