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Common Problems and Reasons of Helical Gear Reducer

I. Heating and Oil Leakage of Helical Gear Reduction Motor

In order to improve efficiency, helical gear reducer motors generally use non-ferrous metals as worm gears, while worm gears use harder steel. Because of the sliding friction transmission, more heat will be generated in operation, which makes the thermal expansion difference between the parts and seals of the reducer, thus forming a gap in each mating surface. Lubricating oil is easy to leak due to the increase of temperature.

The main reasons for this situation of helical gear reducer motor are four points: the unreasonable matching of materials; the poor quality of meshing friction surface; the incorrect selection of lubricant additions; and the poor assembly quality and use environment.

Worm wheel wear of helical gear reducer motor

Tin bronze is commonly used in the worm wheel of helical gear reducer motor. The matched worm material is hardened by 45 steel to HRC 4555 or 40Cr to HRC 5055 and grinded by worm grinder to Ra 0.8 um roughness. The gear reducer wears very slowly when it is in normal operation. Some gear 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 the operation is overloaded, and the material, assembly quality or use environment of worm gear and worm.

3. Wear of transmission helical gear

generally occurs in vertical mounted reducers, mainly related to the amount of lubricant added and the variety of oil. Vertical installation, it is easy to cause insufficient lubricating oil. When the reducer stops running, the transmission gear oil between the motor and the decelerator loses, and the gear can not get the proper lubrication protection. When the reducer starts, the gear is worn or even damaged due to the lack of effective lubrication.

4. Worm Bearing Damage

In case of failure, even if the gearbox is well sealed, it is often found that the gear oil in the helical gear reducer motor is emulsified, and the bearings are rusted, corroded and damaged. This is because after the gear reducer is running for a period of time, the condensate water produced by the gear oil temperature rising and cooling is mixed with water. Of course, it is also closely related to bearing quality and assembly process.