Frequently asked questions about helical gear reducers

1. Heat and Oil Leaks
In order to improve efficiency, worm gear reducers usually use non-ferrous metals as worm gears, and worms use harder steel.Because it is a sliding friction drive, more heat will be generated during operation, which will generate more heat, which will cause a difference in thermal expansion between the parts of the reducer and the seal, thereby forming a gap on each mating surface, And because the lubricating oil will become thinner and hotter, it is easy to cause leakage.There are four main reasons for this situation.One is the unreasonable combination of materials; the second is the poor quality of the meshing friction surfaces; the third is the selection of the wrong amount of lubricant; the fourth is poor assembly quality and use environment.

2. Wear-resistant worm
The worm gear is usually made of tin bronze, and the matching worm material is hardened with 45 steel to HRC4555, 40Cr hardened to HRC5055, and then grounded to a roughness of Ra0.8μm by a worm grinder.Reducers wear very slowly during normal operation, and some reducers can be used for more than 10 years.If the wear rate is fast, you need to consider whether the selection is correct, whether it is overloaded, as well as the material of the worm gear, assembly quality or the use environment.

3. Gear wear
It usually occurs on a vertically installed reducer, and is mainly related to the amount of lubricating oil and oil type added.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 get proper lubrication protection.When the reducer is started, the gears are not lubricated effectively, resulting in mechanical wear and even damage.

4. Worms cause damage
When a failure occurs, even if the gearbox is well sealed, it is usually found that the gear oil in the reducer is emulsified, and the bearings are rusted, corroded and damaged.This is because the condensate produced by the temperature of the gear oil rises and cools down after the operation of the reducer is mixed with water.Of course, it is closely related to the bearing quality and assembly process.