Development of Equipment for Manufacturing Damaged Bearings for Diagnosis Experiments

Abstract

Rolling bearings are machine elements that are often used in rotating machinery, and their faults can cause serious damage of the rotating machinery. In particular, a sudden fault such as flaking gives a significant impact to rotating machinery, so early detection of fault is very important. There has been many researches on damage diagnosis. However, in many cases, simulated damaged bearings are used because it is difficult to obtain actually damaged bearings. It is necessary to develop a device that can cause rolling fatigue damage to bearings more naturally in a short period of time. The purpose of this study is to develop a equipment that can generate flaking and to clarify technically important points for designing such equipment. The equipment is designed using basic rated life. The amount of decrease of interferences in the fittings between the bearing and axis/housing are taking into account. The jerk sensor and the damage diagnosis method developed in our laboratory were used for the tests. The test results showed that three event of flaking were successfully generated in two bearings.