Share

IIR document

Hermetic compressor valve robust design assessment.

Number: 0647

Author(s) : DA SILVA CASTRO M., YALAGACH M. V., MURAKAMI E.

Summary

Improving the performance or reducing the noise levels of a hermetic compressor often entails optimizing its discharge or suction reed valve design. However, such endeavors frequently involve conflicting objectives, necessitating a trade-off solution. Amidst switching designs, adherence to a crucial constraint is imperative: reliability. This work aims to utilize the staircase method to experimentally determine the bending fatigue strength of different valve materials while minimizing the number of tests and samples required. A shaker was employed to dynamically excite the valve at its resonance, with valve displacement continuously measured using a laser sensor. A software was developed to actively regulate the shaker power and frequency, ensuring precise control of displacement within the desired tolerance for each test. The load on the valve undergoes complete reversal with a mean stress of zero, subsequently adjusted to a zero-based approach using Goodman criteria. Testing proceeds until reaching 2 million cycles or valve failure. Since a real valve is used as specimen, not only the material properties are measured, but also the effect of manufacturing process for this specific design, like the tumbling edge radius. Later, this information is crossed with a specific valve design. To achieve this, FEA is employed to calculate stress and its variability. Material properties, shape, valve fixation position, valve opening, among others are included as variable parameters. A robust design is deemed achieved when the stress distribution is far away from the material strength distribution.

Available documents

Format PDF

Pages: 7 p.

Available

  • Public price

    20 €

  • Member price*

    Free

* Best rate depending on membership category (see the detailed benefits of individual and corporate memberships).

Details

  • Original title: Hermetic compressor valve robust design assessment.
  • Record ID : 30033346
  • Languages: English
  • Subject: Technology
  • Source: 11th IIR Conference on Compressors and Refrigerants.
  • Publication date: 2024/09
  • DOI: http://dx.doi.org/10.18462/iir.compr.2024.0647

Links


See other articles from the proceedings (36)

Indexing