The rollers are used to support the weight of the tractor, and at the same time roll on the track (rail link) or track plate surface of the track. It is also used to limit the track and prevent lateral slippage. When the tractor turns, the rollers force the track to slip on the ground. The rollers are often in mud, water and dust, and are subject to strong impact, so it is required to have reliable sealing and wear-resistant rims. The function of the roller is to transfer the weight of the locomotive unit to the ground and roll on the track. In order to prevent derailment, the track roller should also be able to prevent the track from moving laterally relative to it. Roller wheels often work in muddy water, sand, and withstand strong impacts. The working conditions are extremely harsh, and the rims are easy to wear. Requirements for rollers are: wear-resistant rims, reliable bearing seals, and low rolling resistance.
(1) Wheel body wear. The reason for this is that the steel used is not qualified or the hardness of the material during heat treatment is low and the wear resistance is insufficient; (2) Oil leakage. The roller axle is always rotating through the shaft sleeve, and the wheel body needs to be lubricated with oil, but if the sealing ring is not good, it is easy to produce oil leakage, so that the shaft and the sleeve are easily worn out without lubrication. The product cannot be used. There are the following reasons for oil leakage: 1. The floating oil seal is unqualified; 2. The roundness of the product sleeve is not enough; 3. The gloss of the supporting shaft is not enough; 4. The gear oil does not meet the standard; 5. The tolerance of processing dimensions, etc. All of the above problems will cause the leakage of rollers.