Rotary kiln girth gear life is generally between ten and fifteen years, but most of the girth gear life is only eight to ten years, the pinion wear will be faster, generally three to five years It needs to be replaced, especially for some dry or semi-dry cement kiln replacement. CHAENG is a professional manufacturer of large girth gears. Dugirth the casting process, it will be bonfire on the surface of the gears to make the hardness of the gears meet the high requirements and double the service life of the gears.

The bonfire on the large girth gear surface of the rotary kiln should be noted:

1. It is not necessary to disassemble the girth gear for bonfire, otherwise reinstalling after bonfire will cause some deformation of the gear, and assembly will cause problems;

2. In the process of bonfire, it is necessary to keep the pressure of oxygen, acetylene and water level unchanged;

3. the movement speed should be appropriate, the speed is too slow will burn the tooth surface, too fast will lead to insufficient gear hardness;

4. The water pressure should not be too high when spraying water, otherwise the flame will be extinguished directly;

5. When manufactugirth the nozzle, the inner hole needs to be parallel and uniform, the inner wall needs to be clean and clean, and the welding place needs to be welded firmly;

6. The number of fire holes needs to be determined according to the size of the spray gun, the total area of the fire hole also needs to be based on the area of the spray gun mouth, there can be no mistakes;