Common Problems in Twin Lobe Blowers & How to Fix Them

Twin lobe blowers, also referred to as A1 blowers, are essential components in various industrial applications, including air delivery systems, wastewater treatment, and vacuum operations. Renowned for their oil-free operation, reliability, and efficiency, these machines are critical in maintaining productivity. However, like all mechanical systems, they are prone to occasional issues that can hinder performance or lead to breakdowns if left unresolved.

In this article, we’ll explore common twin lobe blower problems, their root causes, and practical solutions, while also offering tips for preventive maintenance to extend the life and performance of your equipment.

1. Excessive Noise and Vibration in Twin Lobe Blowers

Symptoms:

Unusual or loud operational noise, noticeable shaking or vibration during use.

Common Causes:

Improper assembly of internal components.
Loose bolts or unsecured fasteners.
Unbalanced rotating parts.
Worn-out or damaged bearings.
Improperly installed hose pipes or excessively high air pressure.

Effective Solutions:

Carefully inspect and reassemble internal components with precision.
Secure all bolts, nuts, and fasteners tightly.
Consult a technician if internal parts appear misaligned or unbalanced.
Replace deteriorated bearings and ensure regular lubrication.
Refit pipelines properly and install a silencer to dampen the noise.

2. Blower Overheating Issues

Symptoms:

Excessive heat during operation, unexpected shutdowns, or burning smell.

Common Causes:

Airflow restriction or backpressure exceeding design capacity.
Inadequate or incorrect oil type.
Tight tolerances causing internal friction.
Blocked air passage or clogged filters.

Effective Solutions:

Monitor and maintain air pressure within manufacturer-specified limits.
Use the recommended grade and quantity of oil.
If internal friction is suspected, consult a qualified service professional.
Clean or replace air filters regularly.
Ensure proper ventilation around the blower for optimal airflow.

3. Low Airflow or Reduced Efficiency

Symptoms:

Noticeable drop in air output or system performance.

Common Causes:

Erosion or wear of internal rotors or outer casing.
Leakage in pipelines or faulty seals.
Blocked or restricted air inlet/outlet.
Incorrect motor speed or malfunctioning drive system.

Effective Solutions:

Inspect and replace worn or damaged rotors and housings.
Detect and seal any air leaks in pipes or connectors.
Clear debris from air intake and exhaust paths.
Calibrate motor settings and verify speed regulation.

4. Bearing Failures

Symptoms:

Grinding noises, increased heat, or mechanical play in the blower.

Common Causes:

Incorrect oil levels (either too low or too high).
Poor installation or unstable mounting.
Ingress of dust or contaminants.
Aging or expired bearings.

Effective Solutions:

Maintain the correct oil level specific to the bearing type.
Securely mount the blower to a stable surface.
Operate the blower in a clean environment with efficient air filtration.
Replace bearings according to the manufacturer’s maintenance schedule.

5. Motor Overload and Power Failures

Symptoms:

Motor tripping, overheating, or high energy consumption.

Common Causes:

Excessive system pressure or blockage.
Fluctuating or inadequate power supply.
Incorrect motor specifications or poor system design.
Inadequate cooling or airflow around the motor.

Effective Solutions:

Match the system load with the blower and motor capacity.
Check electrical supply consistency and ensure voltage stability.
Verify motor ratings and ensure compatibility with operational demands.
Improve airflow around the motor for better heat dissipation.

Preventive Maintenance: The Key to Longevity

Routine maintenance is essential for avoiding unexpected downtime and prolonging the operational lifespan of twin lobe blowers. Here are essential preventive maintenance tips:

Regular Inspections

Check all mechanical components—rotors, bearings, gears, and seals—for wear or misalignment.

Consistent Lubrication

Use the correct lubricant and ensure it’s applied in the right quantity at recommended intervals.

Filter Maintenance

Keep air inlet and outlet filters clean to maintain optimal airflow and reduce contamination risks.

Monitor Vibrations

Unusual shaking or vibrations often indicate deeper mechanical issues—investigate immediately.

Staff Training

Train operators and maintenance personnel in blower handling, troubleshooting, and basic upkeep.

Frequently Asked Questions (FAQs)

Q1: Why is my blower making excessive noise?

A: Common causes include loose fittings, unbalanced components, worn-out bearings, or improperly connected piping.

Q2: How can I prevent my blower from overheating?

A: Ensure proper air pressure, use the right oil, clean filters regularly, and maintain a well-ventilated environment.

Q3: What should I check if my blower has low airflow?

A: Inspect internal components, check for air leaks, clear blocked passages, and verify the motor speed setting.

Q4: How can I avoid bearing damage?

A: Regularly lubricate with the correct oil, keep the operating environment clean, and replace bearings as needed.

Q5: How do I extend the life of a twin lobe blower?

A: Follow a scheduled maintenance plan, ensure proper operation, and comply with manufacturer guidelines.

Final Thoughts

Twin lobe blowers are invaluable to industrial operations, but their performance relies on consistent maintenance and timely troubleshooting. By understanding the most common issues and how to address them, you can enhance system efficiency, reduce downtime, and significantly extend equipment life.

Pro Tip: Always consult a certified technician or manufacturer representative for persistent or complex issues.

Maintain your blower—maximize your uptime!