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Investigation of the influence of valve reed-impact seat plate interaction on their impact fatigue properties.

Number: pap. 1431

Author(s) : TOFIQUE M. W., LOF A., MILLWARD C., et al.

Summary

During the operation of the reciprocating compressors, the flapper valve closes by striking against the impact seat plate. This valve reed and impact seat plate interaction is repeated billions of times and is thought to play a significant role in controlling the impact fatigue life of the valve reed and, hence, the performance of the compressor. The effect on impact fatigue properties of the interaction between the valve reed and the impact seat plate has been recognized as one of the potentially important aspects of compressor design. The goal of this study was to understand how the performance and impact fatigue life of the flapper valves was affected by impact seat plates made from different materials. Consequently, impact fatigue testing was performed for the Flap-X steel grade as the valve reed material against impact plates made from five different steels and Polyether Ether Ketone (PEEK) material. Impact fatigue tests were conducted on a custom-built impact fatigue test rig that used air pulses to produce movement of the reed valves at frequency of 305 Hz and pulse width of 2.2 milliseconds. The test equipment was connected to a dedicated compressor. The performance of the Flap-X reed valves in terms of impact fatigue life was found to be best against the PEEK impact seat plates followed by the sintered steel impact seat plates. The Flap-X reed valves performed the worst when tested against the austenitic stainless steel impact seat plates. The performance of the Flap-X reed valves was analyzed in relation to their interaction with the impact seat plate materials, their mechanical properties and damping. The symmetrical positioning of the reed valves on the impact seat was found to be beneficial to the impact fatigue life.

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Pages: 11

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Details

  • Original title: Investigation of the influence of valve reed-impact seat plate interaction on their impact fatigue properties.
  • Record ID : 30024352
  • Languages: English
  • Source: 2018 Purdue Conferences. 24th International Compressor Engineering Conference at Purdue.
  • Publication date: 2018/07/09

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