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Causes and solutions for common failures of worm gear reducers

Causes and solutions for common failures of worm gear reducers

  • Categories:Industry News
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  • Time:2018-04-13
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[Summary]The reducer heats up and leaks oil. In order to improve efficiency, worm gear reducers generally use non-ferrous metals as worm wheels, and worms use harder steel. Because it is a sliding friction transmission

Causes and solutions for common failures of worm gear reducers

[Summary]The reducer heats up and leaks oil. In order to improve efficiency, worm gear reducers generally use non-ferrous metals as worm wheels, and worms use harder steel. Because it is a sliding friction transmission

  • Categories:Industry News
  • Author:
  • Source:
  • Time:2018-04-13
  • Visits:0
Information
1. Common problems and their causes
 
Keywords: reducer, gearbox, gearbox
 
1. The reducer heats up and leaks oil. In order to improve efficiency, worm gear reducers generally use non-ferrous metals as worm wheels, and worms use harder steel. Because it is a sliding friction transmission, more heat will be generated during operation, which will cause differences in thermal expansion between the parts and seals of the reducer, thereby forming gaps in each mating surface, and the lubricating oil will become thinner due to the increase in temperature, which 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 friction surface; the third is the incorrect choice of lubricant; the fourth is the poor assembly quality and use environment.
 
2. Worm gear wear. The worm wheel is generally made of tin bronze, and the matched worm material is hardened with 45 steel to hrc4555, or 40cr hardened hrc5055, and then ground to a roughness of 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 rate is fast, 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. The drive pinion helical gear is worn. It usually occurs on the reducer installed vertically, 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 will be lost, and the gears will not get the proper lubrication protection. When the reducer is started, the gears are not effectively lubricated, causing mechanical wear and even damage.
 
4. Worm bearing is damaged. When a failure occurs, even if the gearbox is well sealed, it is often 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 gear oil temperature rises and cools down after the gearbox has been running for a period of time is mixed with water. Of course, it is also closely related to the bearing quality and assembly process.

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