Temperature rise and vibration are common warning signs in screw blower operation. 

If ignored, these issues can lead to serious failures. 

Understanding the root causes helps operators act early. 

Proper troubleshooting improves reliability and extends equipment life.

Why Temperature and Vibration Matter

Screw blowers are designed for stable, continuous operation. 

Abnormal heat or vibration indicates mechanical or process problems. 

These conditions increase wear and energy use. 

Early diagnosis prevents costly downtime.

Common Causes of High Temperature

1. Insufficient Cooling

Cooling systems remove heat from the blower and motor. 

Blocked coolers or low cooling flow cause rapid temperature rise. 

This is common in dusty or high-ambient environments.

2. Excessive Discharge Pressure

When system pressure exceeds design limits, compression heat increases. 

This often results from clogged filters or closed valves. 

High pressure directly raises internal temperatures.

3. Poor Lubrication

Low oil level or degraded oil reduces heat transfer. 

Friction increases and bearings overheat. 

Oil condition should be checked regularly.

4. High Inlet Temperature

Warm intake air reduces cooling efficiency. 

In chemical plants, intake air may be affected by nearby process heat. 

This increases discharge temperature.

Common Causes of Excessive Vibration

1. Rotor Imbalance

Dust buildup or internal damage causes rotor imbalance. 

Even small changes increase vibration over time. 

This stresses bearings and seals.

2. Misalignment

Motor and blower shaft misalignment creates uneven loading. 

This often occurs after installation or maintenance work. 

Misalignment leads to vibration and coupling wear.

3. Bearing Wear

Worn bearings allow excessive shaft movement. 

Vibration increases gradually and becomes more severe if ignored.

4. Foundation Problems

Weak or uneven foundations amplify vibration. 

Loose anchor bolts are also a common cause. 

Structural checks are essential.

How to Troubleshoot Effectively

Start with operating data. 

Compare temperature, pressure, and vibration trends to normal values. 

Inspect cooling systems and lubrication first. 

Mechanical inspections should follow if problems persist. 

Do not adjust control settings without understanding the cause.

Preventive Measures

Regular monitoring is key. 

Use vibration sensors and temperature alarms. 

Keep cooling systems clean. Follow oil change schedules. 

Proper installation and alignment reduce long-term issues.

Conclusion

Temperature and vibration problems should never be ignored. 

They provide early warning of deeper issues in screw blowers. 

With systematic troubleshooting and preventive care, plants can maintain stable operation, reduce failures, and protect their investment.