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Rotordynamics and Fatigue Analyses of a Twin-Screw Compressor with 4-6 Configuration and Internal Cooling Channels.

Number: 1566

Author(s) : SARAVANA A., LIU H., ABLE N., COLLINS J., GROLL E. A., ZIVIANI D.

Summary

Twin-screw compressor technology is widely employed in commercial and industrial HVAC&R applications as well as in air-compression and gas processing industries. Twin-screw compressors are characterized by relatively high efficiencies at part and full-loads, and high reliability. However, innovative designs and higher efficiency are needed to further reduce power consumption, improve the compression process, and minimize internal losses.
This study focuses on the development of a hollow twin-screw compressor with internal cooling channels to achieve a near isothermal compression process. Over time, the rotors can be affected by stress accumulation and deformations due to their hollowness and reduced wall thicknesses. To analyze the dynamic behavior of the rotor pair, a detailed rotordynamic simulation model and a fatigue analysis have been conducted by using the actual compression forces obtained from previous CFD studies. Both hollow and solid rotors have been analyzed and compared. The bearing loads have been verified against Campbell diagrams whereas the fatigue results have been compared with experimental testing. With the validated model, the hollow rotor compressor durability was analyzed and compared with the conventional rotors.

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Pages: 10 p.

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  • Original title: Rotordynamics and Fatigue Analyses of a Twin-Screw Compressor with 4-6 Configuration and Internal Cooling Channels.
  • Record ID : 30030406
  • Languages: English
  • Subject: Technology
  • Source: 2022 Purdue Conferences. 26th International Compressor Engineering Conference at Purdue.
  • Publication date: 2022/07/15
  • Document available for consultation in the library of the IIR headquarters only.

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