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Abstract

Correctly operated compressor multi-ring valves are known to fail essentially by radial crack growth. The existing explanations of static pressure (with or without impact forces) or foreign matter entrapment are found to be inconsistent with the crack alignment and site respectively. The hypothesis is made that diametral vibration modes are responsible, since they relate to the crack alignment. Wear examination reveals that these modes occur during valve operation and that a four diameter mode is common. Laser holography and a crude finite element analysis depict diametral modeshapes which match the wear patterns. Crack and stress details give further support to the hypothesis. A more rigid plate design is suggested.

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10.

Macneal Schwendler Corporation, Los Angeles, California, USA.

Analysis of Failure of Compressor Multi-Ring Valve Plates

Abstract

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References