Common failures and causes of extruder gearbox
Extruder gearbox is the "power transmission core" of extrusion equipment, its failure will directly lead to production interruption or abnormal product quality. The following are the common gearbox faults and causes:
|
fault phenomenon |
Most likely reasons (in order of probability) |
|
Oil leakage in gearbox |
1. Oil seal aging / lip wear; 2. Loose bolts on the joint surface of the housing; 3. Too high oil level; 4. Cracks in the housing |
|
Abnormal operating noises |
1. Gear wear/pitting; 2. Bearing damage; 3. Coupling bolts loose; 4. Foreign matter in housing |
|
High temperature (bearing/casing) |
1. Insufficient lubrication/oxidized oil; 2. Bearing damage; 3. Poor gear meshing; 4. Overload |
|
Insufficient output torque (extruder speed decreased) |
1. Gear slip (keyway wear); 2. Bearing jam; 3. Slip between input shaft and motor coupling |
|
There are metal fragments in the oil |
1. Gear tooth surface spalling; 2. Bearing raceway/roller wear; 3. Shaft neck wear |
Through the above investigation, the fault point of extruder gearbox can be accurately located, providing a clear basis for subsequent maintenance, and reducing the secondary damage to equipment or production delay caused by blind maintenance.
