Screw Conveyor: Common Failures And Solutions

1. Excessive material volume, causing overload.

2. Large foreign matter or fibrous impurities mixed in the material, causing jamming.

3. Bearing damage, resulting in high rotational resistance.

4. Low power supply voltage.

5. Undersized motor, insufficient power.

1. Reduce feed rate and ensure even feeding.

2. Stop the machine to clean foreign matter and install a screen or mesh at the feed inlet.

3. Replace damaged bearings.

4. Check the power supply circuit and restore normal voltage.

5. Recalculate power and replace the motor with one of appropriate power.
 

1. Damaged or severely worn hanger bearings.

2. Friction and collision between the spiral blades and the machine casing.

3. Loose bolts, especially the hanger bearings and anchor bolts.

4. Bent spiral shaft and misaligned concentricity.

5. Uneven feed, resulting in uneven material distribution within the machine.

1. Stop the machine for inspection and replace the suspension bearings.

2. Check and adjust the clearance between the blades and the casing, and correct any bent screw shafts.

3. Stop the machine and tighten all bolts.

4. Correct or replace the screw shaft.

5. Adjust the feed mechanism to ensure uniform and continuous feeding.

1. Severe wear of the spiral blades, resulting in reduced pushing capacity.

2. Changes in material properties (such as increased moisture or viscosity) leading to adhesion and blockage. 3. Required speed not met (such as belt slippage).

4. Blockage in the feed port or poor feeding.

5. Excessive fill factor, making it difficult to push material forward.

1. Replace worn blades or weld a wear-resistant layer on the outer edges.

2. Clear any material adhering to the machine; select an appropriate type for the material characteristics (e.g., paddle or belt-type screw).

3. Check the motor and transmission, and tighten the belt.

4. Clean the feed inlet and inspect the feeder.

5. Reduce the feed rate.

1. Operational Cause: Failure to promptly stop the feeder after subsequent equipment shuts down, or failure to empty the material in the machine during shutdown.

2. Equipment Cause: Insufficient pushing force due to worn blades, bent shafts, or damaged bearings.

3. Material Cause: Excessive mixing, caking, high moisture content, or stickiness.

4. Design Cause: Improper speed selection, excessive conveying angle.

1. Strictly follow the operating procedures: When starting the machine, start the conveyor first, then the feeder; when shutting down, stop the feeder first and wait until the material inside the machine is empty before stopping the conveyor.

2. Inspect and repair any problems with the equipment itself (blades, shafts, bearings).

3. Strengthen material pretreatment and remove any lumps.

4. In case of severe blockage, shut down the machine and manually clean the blockage through the inspection port or outlet. Forced restart is strictly prohibited!

1. Seal is worn or aged.

2. Bearing cover bolts are loose.

3. Flange gasket at the casing connection is damaged or bolts are loose.

4. Excessive internal pressure.

1. Replace seal.

2. Tighten end cover bolts.

3. Replace gasket and tighten connection bolts.

4. Check and adjust the air volume and pressure of the dust removal screen.

1. Poor lubrication (lack of oil, incorrect oil type, or contaminated oil).

2. Improper or damaged bearing installation.

3. Poor seal, allowing dust to enter the bearing.

4. Overload operation.

1. Add appropriate grease regularly and in the prescribed amount.

2. Reinstall or replace the bearing.

3. Check and improve the bearing seal structure.

4. Reduce the feeding amount to avoid overloading.