Abstract
Calculations were carried out to clarify the oil film characteristics of the corsshead-pin bearing with a very low clearance ratio and wedge geometry incorporated oil-grooves for large size two-stroke diesel engines. Reducing the clearance ratio is advantageous for enhancing squeeze action on the entirety of the bearing pads to decrease the maximum oil film pressure. However, this also has a negative aspect reducing wedge action, thereby causing the oil film thickness to decrease. When the clearance ratio becomes very low, incorporating a proper wedge geometry on both sides of the oil-grooves is an effective means to improve wedge action, and thereby to increase the oil film thickness without a significant raise in the oil film pressure.
