1. Heat and oil leakage

As it is a sliding friction drive, more heat will be generated during operation, so that the thermal expansion between the parts and the seal of the Mini planetary geared electric motor is different, thus forming a gap on the mating surface, and the lubricating oil becomes thinner due to the increase in temperature, which is easy to cause leakage. There are four main reasons for this situation. First, the material collocation is unreasonable; Second, the quality of the meshing friction surface is poor; Third, the selection of the amount of lubricating oil added is incorrect; Fourth, the assembly quality and the use of poor 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 hardened to HRC5055 with 40Cr and then ground to a roughness Ra0.8μm by the worm grinder. Gear reducers wear 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 the overload operation, and the material, assembly quality or use environment of the worm gear.

3, gear wear

It generally occurs on vertical mounted Mini planetary geared electric motor, 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 gear can not get proper lubrication protection. When the reducer is started, the gear is not effectively lubricated, resulting in mechanical wear and even damage.

4, worm bearing damage

In the event of failure, even if the gear reduction secret is well sealed, it is often found that the gear oil in the reducer is emulsified, and the bearing is rusted, corroded, and damaged. This is because after the Mini planetary geared electric motor runs for a period of time, the condensate generated after the gear oil temperature rises and cools is mixed with water. Of course, it is also closely related to bearing quality and assembly process.

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