The horizontal scraper centrifuge, as a solid-liquid separation equipment, is widely used in chemical, pharmaceutical, food and other fields. During long-term operation, various malfunctions are prone to occur due to factors such as material characteristics, operating standards, and equipment wear and tear. The following outlines common types, manifestations, and targeted handling methods of faults, providing reference for equipment maintenance:
1. Difficulty initiating
Reason: Electrical protection triggered (excessive starting current), residual material in the drum blocking the filter screen, abnormal oil pressure system (pressure relay failure).
Solution:
•Adjust the parameters of the time relay to avoid misoperation of overload protection;
•Use clean water to pressurize and rinse the filter screen, and cooperate with manual turning to discharge residual materials;
•Check the oil circuit pressure, replace the faulty pressure relay or adjust the oil pressure gauge.
2. Abnormal vibration during operation
Reason:
•Dynamic balance failure (misalignment of drum assembly, lack of dynamic balance correction);
•Bearing wear or lubrication failure (deterioration of lubricating oil, insufficient oil supply);
•Loose mechanical components (differential damage, screw conveyor bearing failure).
Solution:
•Re calibrate the rotational balance and check the alignment of the assembly lines;
•Replace deteriorated lubricating oil or replenish oil, repair/replace worn bearings;
•Tighten loose parts (such as nose flange, differential accessories) and connect the drain port with a hose to reduce vibration transmission.
3. Abnormal scraper action
Reason:
•Hydraulic system malfunction (unstable oil pressure, blocked oil circuit, malfunctioning solenoid valve);
•Mechanical wear (blade passivation, piston seal failure).
Solution:
•Adjust the pressure of the fuel supply system, unblock the blocked oil circuit, and replace the malfunctioning solenoid valve;
•Grind or replace the passivation scraper, check the piston sealing groove and replace the seal.
4. The bearing temperature is too high
Reason: Poor lubrication (deterioration of oil quality, interruption of oil supply), damaged bearings or overly tight assembly, excessive belt tension.
Solution:
•Replace high-quality lubricating oil to ensure sufficient oil supply;
•Adjust the bearing clearance or replace damaged bearings, and check the tightness of the belt.
5. Blockage of the filter screen leads to material leakage
Reason: Excessive feeding, malfunction of the material layer limiter, and failure to clean the filter screen in a timely manner.
Solution:
•Adjust the feeding speed, repair or replace the limiter;
•Regularly backwash the filter screen with clean water, and shut down for cleaning in case of severe blockage.