Over the past twenty years, we’ve specialized in maintaining, performing quick repairs, and conducting major overhauls on horizontal screw centrifuges. Our primary focus has been on servicing renowned imported brands like Flewis, Alfa Laval, Anderitz, Beares, Vesfaria, and Ishikawashima, as well as domestic manufacturers such as Ruiwei, Haishen, Shangli, Qingtian, and Lushui. This extensive experience has helped countless domestic users resolve issues related to operating horizontal spiral centrifuges. To assist you in diagnosing and addressing common centrifuge malfunctions, here’s a refined overview of some prevalent issues and their solutions:
### 1. Oil Pressure Failures
Oil pressure anomalies in centrifuges typically manifest as absent, insufficient, or excessive pressure. Here's how to address these:
- **No Oil Pressure**: Inspect the oil filter for clogging, verify the integrity of the pressure gauge, and ensure all oil lines and connections are secure without leaks or cracks. Additionally, check for any obstructions within the oil lines.
- **Low Oil Pressure**: Normally, the outlet oil pressure should range between 3.0 to 3.5 bar. If it's below this level, confirm that the suction line from the oil pump to the reservoir is clear. Examine the oil circuit for leaks and inspect the coupling between the motor and the oil pump shaft. Replace either the coupling or the oil pump if necessary.
- **High Oil Pressure**: When the oil pressure exceeds acceptable levels, review the equipment manual to ensure proper lubricant types are used. Check all pipelines for blockages and use compressed air to clear any debris obstructing flow.
### 2. Excessive Vibration
Vibrations exceeding acceptable limits often result from improper installation, blocked or deformed baskets, obstructed coal channels, or loose bolts. Solutions involve:
- Inspecting the basket for blockages, wear, or deformation.
- Evaluating the condition of the exciter springs for signs of aging.
- Checking for fine coal accumulation on one side of the basket.
- Assessing the condition of the wedge-shaped basket for damage or imbalance.
- Ensuring grounding bolts are secure and free from rust.
- Replacing damaged bearings and verifying compatibility when installing new motors.
### 3. Unusual Noise
Unusual noises usually stem from tight gaps between components, foreign objects entering the system, or faulty bearings. Address these by:
- Adjusting the gap between the basket and scraper.
- Confirming the oil circuit remains functional.
- Removing any foreign objects from the machinery.
- Inspecting belts for damage or detachment.
- Replacing damaged bearings.
### 4. Motor Malfunctions
Motor issues may prevent starting or cause overheating. To troubleshoot:
- Verify power supply stability and starter functionality.
- Ensure correct grounding and phase continuity.
- Check for mechanical overload conditions.
- Investigate potential bearing issues or excess grease.
### 5. Feeding and Discharge Problems
Feeding and discharge disruptions frequently occur due to worn-out screens, excessive coal volumes, or high moisture content in coal-water mixtures. Solutions include:
- Replacing worn screens promptly.
- Monitoring coal quality and adjusting feed rates accordingly.
- Managing moisture levels in inputs.
- Verifying scraper alignment and condition.
These insights represent innovative approaches to troubleshooting centrifuge problems, offering practical guidance for maintaining optimal performance.
ZHITONG PIPE VALVE TECHNOLOGY CO.,LTD , https://www.ztongvalve.com