舌簧阀片加速寿命实验方法及失效检测技术研究

Translated title of the contribution: Investigation on accelerated life test method and failure detection technology of reed valve

Huaqiang Jin, Jiangping Gu, Yuejin Huang, Zhe Sun, Xinlei Wang, Xi Shen

Research output: Contribution to journalArticlepeer-review

Abstract

The reed valve is a vulnerable part of the hermetic reciprocating compressor. Its working stability and service life directly determine the refrigeration performance, product life and vibration noise of the whole machine. Through the study of the motion model of reciprocating compressor and the mechanical model of the reed valve, a method of accelerated life test of the reed valve is proposed with the excitation pressure difference and the excitation frequency as the acceleration factor. The maximum value and the minimum value of the valve lift are introduced to evaluate the optimum range of the acceleration factor. And automatic identification of valve failure in test based on acoustic diagnosis method. The test data of the experimental verification device shows that the characteristics are extracted from the sound signals of the normal and failure reed valves base on ensemble empirical mode decomposition (EEMD) and sample entropy (SampEn). The entropy characteristic vectors of both valves are distinctly different. The similarity of the entropy characteristic vectors is measured by the Euclidean distance, and the failure of the valve in the accelerated life is determined. The accelerated life is used to provide the basis for the evaluation of the service life of the reed valve.

Translated title of the contributionInvestigation on accelerated life test method and failure detection technology of reed valve
Original languageChinese (Traditional)
Pages (from-to)280-290
Number of pages11
JournalGaojishu Tongxin/High Technology Letters
Volume30
Issue number3
DOIs
StatePublished - Mar 25 2020

Keywords

  • Accelerated life
  • Acoustic diagnosis
  • Ensemble empirical mode decomposition (EEMD)
  • Failure detection
  • Reed valve

ASJC Scopus subject areas

  • Engineering(all)

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