Common faults of worm gear reducer frame and its causes

Common faults of worm gear reducer frame and its causes

Common problems of worm gear reducer and its causes: Worm gear reducer is a transmission machine with compact structure, large transmission ratio and self-locking function under certain conditions. It is one of the most commonly used reducers, in which the hollow shaft The worm gear reducer not only has the above characteristics, but also has convenient installation and reasonable structure, and is widely used. The hollow shaft type worm gear reducer is equipped with a helical gear reducer at the input end of the worm gear reducer. The multi-stage reducer can achieve a very low output speed. It is a combination of helical gear stage and worm gear stage. Single stage worm gear reducers have higher power. And the oscillation is small, the noise is low, and the energy consumption is low. Common problems and their causes are as follows:

1) Worm gear reducer frame heat and oil leakage

In order to improve the power, the worm gear reducer generally uses non-ferrous metal as the worm wheel, and the worm uses the harder steel. Because it is a sliding friction transmission, during the working process, high heat will be generated, and the parts and seals of the reducer will be sealed. There is a difference in the onset of thermal expansion, so that the gap occurs in each mating surface, and the oil becomes thinner due to the increase in temperature, and a leak is simply formed. The primary reason is 4 points. First, whether the raw material is properly blended, the second is the surface quality of the meshed friction surface, the third is the selection of smooth oil, and the increase is correct. The fourth is the quality of the device and the application environment.

2) Worm gear wear

The worm gear is generally made of tin bronze. The paired worm data is generally hardened to 45°C to HRC45-55. It is also commonly used 40C: hardened HRC50-55. Grinding to roughness Ra0.8fcm by worm grinder, when the reducer works normally, the worm Just like a hardened "sickle", the worm gear is continuously smashed, causing the worm wheel to wear out. In general, this wear is very slow, and some reducers in a factory can be used for more than 10 years. If the wear speed is fast, it is necessary to consider whether the selection of the reducer is correct, whether there is overload work, the raw materials of the worm gear, the quality of the device or the operating environment.

3) Drive small helical gear wear

The general attack on the reducer of the vertical device is mainly related to the increase of the smooth oil and the selection of the smooth oil. In the case of a vertical device, it is very simple to form a smooth amount of oil. When the reducer stops working, the transmission gear oil between the motor and the reducer is lost, the gears are not smoothed and should not be useful during starting or working. Smoothness causes mechanical wear and even damage.

4) Damaged worm bearing

When the speed reducer is in trouble, even if the gearbox is well sealed, it is often found that the gear oil in the reducer is now emulsified, the bearing has been rusted, corroded and damaged. This is due to the gear oil during the stop and stop of the reducer. The agglomeration of water that occurs after the heat is cooled; of course, it is also closely related to the bearing quality and the device process.