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Time：2025-06-09 15:11:53 Reading volume：
It is a common fault for centrifugal oil purification devices to have "oil leakage" (i.e. abnormal leakage or loss of oil) during operation, which may be caused by many reasons such as equipment design, operation and maintenance, or system matching. The following is a specific analysis of the reasons and corresponding solutions:
1. Poor dynamic balance of the drum
- Cause: The manufacturing accuracy of the centrifuge rotor is insufficient or the dynamic balance is not calibrated, and the vibration is too large during high-speed rotation, resulting in wear of the sealing parts or cracking of the shell.
- Performance: Abnormal vibration during operation, oil splashing and leaking from the shaft seal or flange.
- Solution: Recalibrate the dynamic balance or ｒｅｐｌａｃｅ a qualified rotor.
2. Failure of the sealing structure
- Cause: The material of the mechanical seal, O-ring or packing seal is not oil-resistant (such as ordinary rubber instead of fluororubber), improper installation or long-term aging.
- Performance: Oil leakage at static sealing points (such as end covers, observation windows) or dynamic sealing points (spindle).
- Solution: ｒｅｐｌａｃｅ oil-resistant seals and install them strictly according to specifications.
1. Excessive oil inflow or high pressure
- Cause: The flow rate of the oil inlet pump exceeds the processing capacity of the centrifuge, resulting in insufficient separation of the oil and liquid, which is overflowing from the slag discharge port or exhaust hole.
- Performance: Oil leakage is accompanied by a decrease in the separation effect (export oil contains water/impurities exceeding the standard).
- Solution: Adjust the oil inlet valve to the rated flow rate (refer to the equipment nameplate), and add a flow meter for monitoring.
2. The oil temperature is too low or the viscosity is too high
- Cause: The viscosity of cold oil is too high, and the centrifugal force cannot effectively separate impurities and water. The oil has poor fluidity and accumulates in the drum and overflows.
- Performance: Frequent oil leakage in winter or during cold start.
- Solution: Preheat the oil temperature to 40~60℃ (depending on the oil model), or switch to low-viscosity oil.
3. Improper operation and maintenance
1. Too long slag discharge cycle
- Cause: The sludge deposited in the drum was not cleaned in time, resulting in the oil being squeezed out after the slag chamber is full.
- Symptom: Oil leakage from the slag outlet, and a sudden ｄｒｏｐ in separation efficiency.
- Solution: Regularly discharge slag according to the manual requirements (such as once every 8 hours), or enable the automatic slag discharge function.
2. Start-stop operation error
- Cause: Direct high-speed operation without low-speed warm-up at startup, or opening the cover without inertia parking after shutdown, causing oil splashing.
- Symptom: Sudden oil leakage during operation.
- Solution: Strictly follow the start-stop process (such as running at low speed for 3~5 minutes before speeding up).
1. Too small oil-water density difference
- Cause: The oil is seriously emulsified or mixed with light hydrocarbons, the oil and water densities are close, and centrifugal force is difficult to effectively separate.
- Symptom: Oil leakage and high oil content at the drain outlet.
- Solution: Add demulsifier or ｒｅｐｌａｃｅ the centrifuge (density difference should be considered when selecting, usually requiring >0.01g/cm³).
2. Pipeline connection error
- Cause: The inlet and outlet pipes are connected in reverse or the exhaust valve is blocked, resulting in the inability of the oil to circulate normally.
- Symptom: The internal pressure of the equipment is abnormal, and the oil sprays out from unexpected interfaces.
- Solution: Check the pipeline drawings to ensure that the inlet and outlet and exhaust valves are unobstructed.
1. Corrosion or wear
- Cause: The inner wall of the drum or the disc group is corroded and perforated, and the oil short-circuit leaks.
- Symptom: Oil leakage is accompanied by an increase in metal chips.
- Solution: Stop the machine to check the internal components and ｒｅｐｌａｃｅ corrosion-resistant materials (such as 316L stainless steel).
2. Vacuum system failure (if it is a vacuum centrifuge)
- Cause: The failure of the vacuum pump causes the pressure in the separation chamber to increase, and the oil is carried out by the gas.
- Symptom: The vacuum gauge reading is abnormal, and the exhaust port is oily.
- Solution: Repair the vacuum pump and sealing pipeline.
1. Observe the oil leakage location: determine the leakage point (such as shaft seal, slag outlet, weld, etc.).
2. Check the operating parameters: check whether the flow, temperature, and speed are normal.
3. Analyze the oil status: detect water content, viscosity, and impurity concentration.
4. Trace the operation records: confirm whether the oil has been replaced, parameters have been adjusted, or disassembled for maintenance recently.
- Regular maintenance: Check the wear of seals and bearings every quarter.
- Oil monitoring: detect moisture and particle size online to avoid overload operation.
- Train operators: emphasize standardized operation (such as slow speed increase and timely slag discharge).
Through systematic troubleshooting, the oil leakage problem can be solved in a targeted manner to ensure the efficient and stable operation of the centrifugal oil purification device.
