Friction in Low Speed Lubricated Rolling and Sliding Contacts

摘要

A four-disk machine for friction measurements at low speed lubricated rolling and sliding contacts was built. Values for the coefficient of friction in the range of 0.03 to 0.11 were measured. In conditons of pure rolling at low speeds the lubricant and its additive content have considerable influence on friction because of a deforming or mangling effect of the boundary lubricant film in the inlet region of the contact. The rolling speed significantly, influences rolling friction, whereas the disk material combination slightly influences rolling friction. No appreciable influence of load, lubricant viscosity or surface roughness on the coefficient of rolling friction was found.