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Common problems and causes of worm gear reducer

Updated:2020-10-16
Summary:The RV series worm gear reducer is based on the national standard GB10085-88 cylindrical worm gear p...

The RV series worm gear reducer is based on the national standard GB10085-88 cylindrical worm gear parameters, and absorbs advanced technology at home and abroad. It has a unique and novel "square box" shape and beautiful appearance. It is made of high-quality aluminum alloy die-casting. to make. The RV series worm gear reducer has been widely used in mechanical deceleration devices of production process equipment in various industries. It is the best choice for modern industrial equipment to achieve large torque, high speed ratio, low noise, and high stability mechanical deceleration transmission control devices.
Common problems and their causes
Heat and oil leakage
In order to improve efficiency, worm gear reducers generally use non-ferrous metals as worm wheels and harder steel as worms. Because it is a sliding friction transmission, high heat will be generated during operation, which makes the parts and seals of the reducer There is a difference in thermal expansion between them, which creates a gap in each mating surface, and the oil becomes thinner due to the increase in temperature, which is easy to cause leakage. There are four main reasons. One is whether the combination of materials is reasonable, the second is the surface quality of the meshing friction surface, the third is the choice of lubricant, whether the amount of addition is correct, and the fourth is the assembly quality and use environment.
Worm gear wear
The worm wheel is generally made of tin bronze, and the matched worm material is generally hardened with 45 steel to HRC45-55, and 40C: hardened HRC50-55 is commonly used, and it is ground to a roughness of RaO. 8 fcm by a worm grinder. When the reducer is running normally, The worm is like a hardened "file" that keeps filing the worm wheel, causing wear and tear on the worm wheel. Generally speaking, this kind of wear is very slow, like some reducers in a factory can be used for more than 10 years. If the wear rate is fast, it is necessary to consider whether the selection of the reducer is correct, whether there is overload operation, the material of the worm gear, the assembly quality or the use environment and other reasons.
Helical gear wear
It usually occurs on the reducer installed vertically, mainly related to the amount of lubricant added and the choice of lubricant. 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 will be lost, and the gears will not get the proper lubrication protection, and will not be effective during startup or operation. The high lubrication causes mechanical wear and even damage.
Bearing damage
When the reducer fails, even if the reduction box is well sealed, the factory often finds that the gear oil in the reducer has been emulsified, and the bearings have been rusted, corroded, and damaged. This is because the gear oil is It is caused by the condensation of moisture generated after the heat becomes cold; of course, it is also closely related to the quality of the bearing and the assembly process.

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