Screw failure is one of the core component problems causing shutdowns of floating fish feed extruder machines. As the "heart" of the extruder, the screw endures high temperatures, high pressures, and intense friction over long periods. If used for an extended period or if the raw material contains excessive impurities, screw wear, bending, and breakage can occur. When the screw is severely worn, its ability to push raw material decreases significantly, causing material to accumulate in the extrusion chamber, leading to increased load and shutdown. If the screw is bent or broken, it will directly jam in the extrusion chamber, causing an instant shutdown, possibly accompanied by abnormal noise. For example, in large-scale production, the long-term use of unscreened raw materials containing impurities will accelerate screw wear, potentially leading to shutdowns within 3-6 months. Furthermore, improper screw assembly, such as insufficient clearance between the screw and the extrusion chamber or coaxiality deviation, can also result in excessive frictional resistance during operation, causing shutdowns.
Bearing damage or poor lubrication is also a common cause of shutdowns in small floating fish feed machines. Bearings are key components supporting the screw and transmission system. Operating under high-speed rotation and high-temperature environments for extended periods, untimely lubrication or the use of inappropriate lubricating oil can lead to bearing wear and seizure. Bearing failure will cause a sharp increase in screw operating resistance, leading to excessive equipment load and triggering overload protection shutdown. This may also be accompanied by abnormal heating and noise from the bearing area. Additionally, transmission system failures (such as belt slippage or breakage, or reducer damage) can also cause the floating fish food extruder to shut down. Belt drive is a common transmission method in extruders. If the belt ages or loosens, slippage will occur, preventing effective power transmission and causing a sudden drop in screw speed or even a complete stop. If the belt breaks or the internal gears of the reducer are damaged, power transmission will be directly cut off, and the equipment will immediately stop.
For shutdowns caused by core component failures, the following solutions are recommended: Regularly check the screw condition. If wear or bending is found, replace or repair it promptly. Strictly control raw material impurities during daily use to extend the screw's lifespan. Establish a regular bearing lubrication mechanism, using high-temperature resistant lubricating oil and replenishing the lubricant every 50-100 hours of operation. Replace damaged bearings immediately. Regularly check the tension and wear of the drive belt, adjusting the tension or replacing aged belts as needed. Regularly maintain the reducer to ensure the normal operation of the transmission system. After the small floating fish feed pellet machine is shut down, the power should be disconnected first. The faulty component should be accurately located by listening to the sound, feeling the temperature, and disassembling and inspecting the parts to avoid blindly restarting the equipment and causing secondary damage.
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