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TRIBOLOGICAL TESTS OF MATERIAL FOR REFRIGERANT COMPRESSORS.

[In Czech. / En tchèque.]

Author(s) : HOLE-CKA V.

Type of article: Article

Summary

AN EXPLANATION IS GIVEN FOR THE ROLE OF ROUGHNESS OF MECHANICALLY MACHINED METAL SURFACES, THEIR HARDNESS RATIO, CLEARANCES AND THICKNESS OF LUBRICATION FILM IN A GIVEN SET OF OPERATING CONDITIONS. A SUITABLE MACHINING ROUGHNESS IS MODELLED BY MEASURING THE ROUGHNESS BEFORE AND AFTER THE RUNNING OF PARTS IN THE COMPRESSOR. A CHOSEN LOAD TEST MAKES IT POSSIBLE TO DETERMINE THE LOAD AS A FUNCTION OF SLIDING SPEED AT A CHOSEN CONSTANT RUNNING SPEED. THE BEST PARAMETERS WERE OBTAINED WITH GREY PERLITIC CAST-IRON. AFTER NITRIDATION THE FUNCTIONAL SURFACE WAS GROUND OFF BY 0.01 TO 0.02 MM. A BEARING COUPLE THUS MODIFIED ATTAINED AN EXTRA HIGH BEARING CAPACITY WITH A VERY LOW COEFFICIENT OF FRICTION.

Details

  • Original title: [In Czech. / En tchèque.]
  • Record ID : 1991-2117
  • Languages: Czech
  • Source: Prum. Potravin - vol. 41 - n. 11
  • Publication date: 1990
  • Document available for consultation in the library of the IIR headquarters only.

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