Research On Simulation Test Technology Of Bearing Fretting Wear

Fretting of bearing is a minimal amplitude movement in contact departmentunder the action of vibration loading, when it is at static or micro amplitude swingingcondition. Because of the minimal movement, oil can not redistribute and formedlubrication on contact surface. And under other working factors fretting can causecorrosion and generate grinding chip, finally formed fretting wear of bearing. Thisphenomenon universally existsa in mechanical system, it can cause impermissiblevibration and impact in bearing running. Bearing fretting crack will initiate and extendwhen serious fretting wear initiated, even fracture failure. Research on simulation testtechnology of bearing fretting wear can design and protect in advance to themechanism structure, for reducing economic loss.This paper analyzes fretting wear in theory, putting forward that it can dividedinto two stages of static and dynamic friction, and differential sliding exist inmovement process of bearing fretting. By analyzing various running model of fretting,getting the conclusion that friction and displacement curves are the most basic andimportant information of fretting simulation test.A new simulation test device of cylindrical roller bearing for fretting wear hasbeen designed. This paper introduces the principle of the test-bed for the fretting wearof ball bearing. Materials of test-bed, simulated factors of test-bed, parameters andsteps of simulation test have been determined. Designner on whole structure of test-bed have been optimized and type of each component has been selected.Using ADAMS this paper simulates and analyzes the performance of simulationtest device, and simulates friction changes in the contact department between rollerand raceway, differential sliding state of different contact force and friction coefficient.Putting forward we can change differential sliding state of contact department bycontrolling loading or adjusting friction coefficient when doing simulation, and research fretting wear of cylindrical roller bearing on experiment.