1. Heat and oil leakage
Due to the sliding friction drive, more heat will be generated during operation, which will cause differences in thermal expansion between the various parts of the gear reducer and the seal, thus forming gaps in each mating surface, and the lubricating oil will become thinner due to the increase in temperature, which is easy to cause leakage. There are four main reasons for this situation, one is the unreasonable combination of materials; the other is the poor quality of the meshing friction surface; the third is the incorrect selection of the amount of lubricating oil added; the fourth is the poor assembly quality and use environment.
2. Worm gear wear
The worm gear is generally made of tin bronze, and the paired worm material is hardened to HRC4555 with 45 steel, or 40Cr hardened to HRC5055 and then ground to a roughness of Ra0.8μm by a worm grinder. Gear reducers wear very slowly during normal operation, and some reducers can be used for more than 10 years. If the wear rate is fast, it is necessary to consider whether the selection is correct, whether it is overloaded, and the material of the worm gear, the quality of assembly or the use environment.
3. Gear wear
It generally occurs on vertically installed reducers, mainly related to the amount of lubricating oil added and the type of oil. When installed vertically, it is easy to cause insufficient lubricating oil. When the reducer stops running, the transmission gear oil between the motor and the reducer is lost, and the gears cannot be properly lubricated and protected. When the reducer starts, the gears are mechanically worn or even damaged due to lack of effective lubrication.
4. Worm bearing damage
When a fault occurs, even if the gear reducer is well sealed, it is often found that the gear oil in the reducer is emulsified, and the bearings are rusted, corroded and damaged. This is because the condensed water generated after the gear oil temperature rises and cools after the reducer has been running for a period of time is mixed with water. Of course, it is also closely related to the bearing quality and assembly process.