In order to improve efficiency, worm gear reducer manufacturers usually use non-ferrous metals as worm gears, while hard steel is used for worm gears.Due to the sliding friction drive, more heat will be generated during operation, which will cause the difference in thermal expansion between the various parts of the reducer and the seal, thus forming a gap on each mating surface.As the temperature rises, the lubricating oil will become thinner and easily cause leakage.There are four main reasons for this situation.First, the material matching is unreasonable; second, the surface quality of the meshing friction surface is poor; third, the choice of lubricating oil is not correct; fourth, the assembly quality and the use environment are poor.
2. The worm gear is worn out
The worm wheel is usually made of tin bronze, and the matching worm material is hardened with 45 steel to HRC4555, or hardened with 40Cr to HRC5055, and then ground to a roughness of Ra0.8m with a worm grinder.The reducer wears slowly during normal operation, and some reducers can be used for more than 10 years.If the wear speed is fast, it is necessary to consider whether the selection is correct, whether it is overloaded, the material of the worm gear, the assembly quality or the use environment.
3. Gearbox bevel gear wear
It generally occurs on a vertically installed reducer, which is mainly related to the amount of lubricating oil and the type of oil.When installed vertically, it is easy to cause insufficient lubricating oil.When the reducer stops running, the oil in the transmission gear between the motor and the reducer will be lost, and the gears cannot be properly lubricated and protected.When the reducer is started, the gears will be mechanically worn or even damaged due to lack of effective lubrication.
4. The worm bearing is damaged
If a failure occurs, even if the 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 after the reducer has been running for a period of time, the condensed water generated after the temperature of the gear oil rises and cools is mixed with the water.Of course, it is also closely related to bearing quality and assembly process.
