Common problems and causes of helical gear reducer

1. Reducer heat and oil leakage In order to improve efficiency, worm gear reducers generally use non-ferrous metals for worm gears, while worms use harder steel. Because it is a sliding friction transmission, more heat is generated during operation, which causes a difference in thermal expansion between the various parts of the reducer and the seal, thereby forming a gap in each mating surface, and the lubricating oil is thinned due to an increase in temperature, which is liable to cause leakage. . There are four main reasons for this situation. One is that the material is not properly matched; the other is the poor quality of the surface of the friction surface; the third is that the amount of lubricant added is not correct; the fourth is the poor quality of assembly and use.
2. The worm gear wear worm gear is generally tin bronze, the paired worm material is hardened to 45°C to HRC4555, or 40Cr hardened HRC5055 and then ground to a roughness Ra0.8μm by a worm grinder. The reducer wears very slowly during normal operation, and some reducers can be used for more than 10 years. If the wear speed is faster, it is necessary to consider whether the selection is correct, whether it is overloaded, and the material, assembly quality or use environment of the worm gear.
3. Transmission small helical gear wear generally occurs on the vertical mounted reducer, mainly related to the amount of lubricant added and the type of oil. When the vertical installation is installed, it is easy to cause insufficient lubricant. When the reducer stops running, the transmission gear oil between the motor and the reducer is lost, and the gears are not protected by the lubrication. When the reducer is started, the gears are mechanically worn or even damaged due to the lack of effective lubrication.
4. When the worm bearing damage occurs, even if the reduction gear box 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 the condensed water produced by the gear oil temperature rises and cools after mixing for a period of time. Of course, it is also closely related to bearing quality and assembly process.

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