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FAILURES OF HERMETIC REFRIGERANT COMPRESSORS FOR COOLING AND HEATING APPLICATIONS AT HIGHER OPERATING TEMPERATURES.

[In Czech. / En tchèque.]

Author(s) : MANEK B.

Type of article: Article

Summary

STRESSES IMPOSED ON A COMPRESSOR ARE GREATER WHEN IT OPERATES ON A HEATING CYCLE (HEAT PUMP) THAN ON A COOLING CYCLE (NORMAL REFRIGERATION). BESIDES THE MATERIAL QUALITY AND SURFACE SMOOTHNESS EMPLOYED FOR MOVING PARTS, ATTENTION MUST ALSO BE GIVEN TO CYLINDER-PISTON CLEARANCE AND LUBRICANT PROPERTIES. THE MOST FREQUENT FAILURES DURING ENDURANCE TESTS ARE DUE TO EXCESSIVE WEAR RESULTING FROM THE LOSS OF THE OIL FILM, IRREGULAR TEMPERATURE DISTRIBUTION WITHIN THE MACHINE, CHANGES IN THE CLEARANCES OF MOVING PARTS, OVERHEATING DUE TO OIL BURN-OUT THUS RESULTING IN SEIZURE. A THERMOVISION DEVICE WAS USED TO MONITOR TEMPERATURE DISTRIBUTION WITHIN THE COMPRESSOR.

Details

  • Original title: [In Czech. / En tchèque.]
  • Record ID : 1986-0571
  • Languages: Czech
  • Source: Prum. Potravin - vol. 36 - n. 5
  • Publication date: 1985
  • Document available for consultation in the library of the IIR headquarters only.

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