Why the Gear of Precision Planetary Reducer Fails

The gear is an important part of the precision planetary reducer, but it will fail during operation. Next, let's take a look at why the precision planetary reducer gear fails.

1. In terms of pressure angle, the bearing capacity of small pressure angle gear is small; However, the gear with large pressure angle has a higher bearing capacity, but the bearing load increases when the transmission torque is the same, so it is only used in special cases. The tooth height of gear has been standardized, and the standard tooth height is generally adopted. Modified gear has many advantages, and has been widely used in all kinds of mechanical equipment.

2. Tooth surface wear For open gear transmission or closed gear transmission containing unclean lubricating oil, due to the relative sliding between the meshing tooth surfaces, some hard abrasive particles enter the friction surface, which changes the tooth profile and increases the backlash, so that the gear is excessively thinner and causes tooth fracture. In general, only when abrasive particles are mixed in the lubricating oil, will the gear surface be worn by abrasive particles during operation.

3. Tooth surface gluing For high speed and heavy load gear transmission, due to the large friction between tooth surfaces and the large relative speed, the temperature in the meshing area is too high. Once the lubrication conditions are poor, the oil film between tooth surfaces will disappear, making the metal surfaces of two gears directly contact, thus causing mutual bonding. When the two tooth surfaces continue to move relative to each other, the harder tooth surface will tear off some materials on the softer tooth surface along the sliding direction to form grooves.