Influences of Wedge Geometry Incorporated Oil-Grooves on Load Carrying Capacity for Crosshead-Pin Bearings

Abstract

Calculations and experiments were carried out to clarify the load carrying capacity of the crosshead-pin bearing with 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, thereby decreasing the maximum oil film pressure. However, this also has a negative aspect of reducing the oil film thickness, thereby causing the load carrying capacity to decrease. Even when the clearance ratio becomes very low, incorporating a proper wedge geometry on both sides of the oil-grooves is an effective means to increase the oil film thickness, and thereby to raise the load carrying capacity.