Due to the rather harsh working environment of the wheelset, improper management, the mine cart wheelset has a short service life. During the investigation, it was found that the wheelset needs overhaul and replacement of seals and bearings when it is normally used for 6 months downhole. In fact, the rail wheelset on the underground work under pressure and speed is not high, track wheelset failure is usually not due to fatigue damage caused by the bearing.
Its main failure form is as follows:
① seal failure. When with acid and alkali components of the mud through the seal gap into the bearing raceway, causing the ball was clogged with dust, stuck and failed.
② bearing failure. As the bearing is stuck, causing the bearing inner ring or outer ring and the relative rotation between the axle or the hub, the axle serious wear resulting stress concentration in the external impact load caused by the axle broken, the inner circle of the hub Serious wear and tear led to the wheel hub and bearing outer ring increases the gap, so that the wheels produce excessive shaking and failure.