Because the working environment of the mine car wheel set is quite bad, the design is also flawed, and the mismanagement is not good, the service life of the mine car wheel set is short. In the investigation, it was found that the wheel sets need to be overhauled and replaced with seals and bearings after being used for 6 months in the underground. In fact, the working load and running speed of the mine car wheel on the down hole is not high, and the failure mode of the mine car wheel pair is usually not caused by bearing fatigue damage.
Its main form of failure is:
1. Seal failure. When the muddy water with acid and alkali components enters the bearing raceway through the gap of the seal, the steel ball is blocked by the mud dust and is stuck and fails.
2. bearing failure. Since the bearing is stuck and does not rotate, causing relative rotation between the inner ring or the outer ring of the bearing and the axle or the hub, the axle is severely worn and stress is concentrated, and the axle is broken under the action of external impact load, and the inner circle of the hub Severe wear causes an increase in the clearance between the wheel hub and the outer ring of the bearing, causing the mine car wheel to be excessively shaken and fail.
