Laboratory centrifuges are widely used in biological research, pharmaceutical analysis, medical testing, chemical laboratories, and industrial applications. As precision instruments operating at high speed, centrifuges require regular maintenance to ensure stable performance, accurate results, and safe operation. During daily use, some centrifuges may experience abnormal vibration, unstable rotation, or a “surge” phenomenon, which can affect separation efficiency and shorten equipment service life.

Daily maintenance of a centrifuge should begin with proper cleaning. After each operation, the rotor chamber, rotor surface, and sample holders should be cleaned to remove liquid residue, chemical contamination, or biological materials. Any remaining liquid may cause corrosion, imbalance, or damage to mechanical components. When cleaning, operators should use appropriate detergents and avoid strong corrosive chemicals that may damage the rotor.

Regular inspection of the rotor is essential because the rotor is one of the most important safety components. Operators should check for cracks, deformation, corrosion, or surface damage before use. Rotors should never be overloaded, and samples should always be balanced according to weight and volume requirements. An unbalanced rotor can cause excessive vibration, abnormal noise, and mechanical stress on the drive system.

The centrifuge lid, sealing components, and locking mechanism should also be inspected regularly. A damaged lid lock or poor sealing condition may create safety risks during high-speed operation. In addition, ventilation openings should be kept clean to prevent overheating of the motor and electronic components. Regular inspection of power connections, control panels, and temperature control systems can help identify potential failures early.

The surge phenomenon in centrifuges refers to unstable rotational behavior, where the motor speed fluctuates, vibration increases, or the equipment produces periodic abnormal sounds. This problem is usually related to mechanical, electrical, or control system issues.

One common cause of surge is rotor imbalance. When samples are unevenly distributed, the rotating system experiences uneven centrifugal forces. This can lead to speed instability and vibration. The solution is to stop operation immediately, check sample balance, and reinstall tubes or containers correctly.

Another possible cause is motor or drive system problems. Aging motor bearings, insufficient lubrication, or damage to the drive components may cause unstable rotation. In variable-speed centrifuges, inverter or control board failures can also result in incorrect speed regulation and surge behavior.

A third cause is excessive load or improper operating parameters. If the centrifuge operates beyond its rated capacity or accelerates too quickly, the control system may struggle to maintain stable speed. Selecting the correct rotor, speed, and acceleration settings according to the manufacturer’s specifications can prevent this issue.

In conclusion, proper daily maintenance is essential for reliable centrifuge operation. Regular cleaning, rotor inspection, load balancing, and electrical checks can greatly reduce failures. When surge phenomena occur, operators should stop the centrifuge immediately and inspect mechanical balance, motor condition, and control systems. Through preventive maintenance and timely troubleshooting, centrifuges can maintain high performance, improve laboratory efficiency, and extend service life.