Enhance Your Screw Compressor System with Axial Thrust Monitors

Question:

Hello, we are looking to enhance our screw compressor system by installing axial thrust monitors. Currently, our refrigeration system's screw compressor is facing issues like excessive vibrations and larger balance piston clearances, resulting in differential oil pressure. The oil is supplied at a higher pressure than the compressor discharge pressure, causing axial thrust and rotor rubbing when the oil pressure decreases. Typically, screw compressors do not come equipped with axial thrust monitoring systems. Is it viable to install one in our system to prevent further issues?

Top Replies

It's not just a matter of feasibility, but rather a consideration of necessity. The importance of axial protection for refrigeration screw compressors cannot be overstated. By implementing axial displacement monitoring and protection for both male and female shafts, you can prevent potential damage. However, it's crucial to also address any issues with the compressor's lube oil supply to avoid facing the same issues. By monitoring the axial trend alongside the lube oil pressure trend, you can implement additional protection measures, such as a trip on low oil pressure. By establishing a comprehensive protection system, you can effectively safeguard against thrust bearing damage and prevent rotor-to-end casing contact.

Hello Valve Team, Thank you for your response. I have an additional question regarding this matter. I am considering installing a flowmeter in the lube oil discharge line and the balance piston oil supply line. This will allow us to monitor the flow rate and any increase in flow could indicate a potential deterioration in the balance piston and increased bearing clearances. Our screw compressors are typically overhauled once a year, so having a flow meter in place will provide continuous condition monitoring throughout the year. This can be a valuable preventive maintenance technique. I would appreciate your insights and suggestions on this matter. Thank you, Jatan.

Absolutely, installing axial thrust monitors can prove beneficial for your screw compressor system. It would enable you to observe and regulate the axial thrust in real-time, which would help mitigate rotor rubbing and excessive vibrations caused by pressure fluctuations. However, it's crucial to consider whether your system is compliant with such an upgrade, and also the costs involved. I'd strongly recommend getting a professional to evaluate your setup first. Furthermore, focusing on optimizing your oil pressure system could be another possible solution to your current issues. Either way, proactive monitoring is one of the best ways to prevent long-term damage to your equipment.

Installing axial thrust monitors in your screw compressor system sounds like a smart move given the issues you’re facing. Excessive vibrations and balance piston clearance concerns can definitely be exacerbated by axial thrust problems. Adding these monitors can provide real-time feedback, allowing you to detect any shifts before they escalate into major issues. It’s definitely viable, and being proactive might save you from costly repairs down the line. Just make sure the monitoring system you choose is compatible with your existing setup and that you regularly maintain it to keep up with the compressor's demands!

Absolutely, installing axial thrust monitors in your screw compressor system sounds like a smart move, especially given the issues you've described. These monitors can provide valuable real-time data, allowing for proactive maintenance before problems escalate into significant damage. They can help maintain optimal operating conditions by alerting you to any deviations that might lead to axial movement, which seems to be a concern in your current setup. Just ensure that the integration is done properly, as the added complexity could require some adjustments to your existing system. It might also be worth consulting with the compressor manufacturer or a specialist to ensure compatibility.

Absolutely, installing axial thrust monitors in your screw compressor system seems like a worthwhile investment, especially given the symptoms you're experiencing. These monitors can provide real-time data on thrust forces, helping you identify potential problems before they escalate, like the rotor rubbing you mentioned. Many facilities have successfully retrofitted existing compressors with monitoring systems, which can lead to improved reliability and reduced downtime. Just make sure to consult with a specialist who understands your specific compressor model to ensure proper integration and functionality—this could significantly enhance your system’s performance.

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Frequently Asked Questions (FAQ)

FAQ: 1. Why is it important to monitor axial thrust in a screw compressor system?

Answer: - Monitoring axial thrust is crucial in a screw compressor system to prevent issues such as excessive vibrations, larger balance piston clearances, differential oil pressure, and rotor rubbing. It helps in maintaining the proper functioning and efficiency of the compressor.

FAQ: 2. What are the common problems associated with axial thrust in screw compressors?

Answer: - Common problems related to axial thrust in screw compressors include increased vibrations, larger balance piston clearances, differential oil pressure, and rotor rubbing. These issues can lead to decreased performance and potential damage to the compressor.

FAQ: 3. How can installing axial thrust monitors enhance a screw compressor system?

Answer: - By installing axial thrust monitors, you can effectively monitor and control the axial thrust within the compressor system. This helps in preventing issues caused by axial thrust, such as vibrations, balance piston clearances, and rotor rubbing, ultimately improving the overall performance and longevity of the system.

FAQ: 4. Are screw compressors typically equipped with axial thrust monitoring systems?

Answer: - No, screw compressors do not usually come equipped with axial thrust monitoring systems. Therefore, it is advisable to consider installing an axial thrust monitor to proactively address potential issues and ensure the smooth operation of the compressor system.

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