Operating experience with railroad cars equipped with journal boxes with cylindrical roller bearings has shown that one of the most dangerous types of damage, leading to breakdowns and accidents, is wedging and spalling of the rollers and the rims of the races. The reported experiments were devoted to the study of antiwear properties of various additives in lubricating greases used in railroad cylindrical roller bearings. These studies were performed in a MT-TsNII laboratory friction tester which is shown schematically. In the first series of experiments, the critical load was determined, i.e., the highest load at which the coefficient of friction remained at the level of 0.3-0.5 during the entire course of the test run at this particular load step. Results are presented which show that, in obtaining reliable and breakdown-free operation of cylindrical roller bearings installed in rail-car journal boxes, the governing factor is found in those changes in friction-surface microgeometry occurring under the influence of the lubricating media in the process of sliding. There is every reason to believe that this index of lubricant properties must also be very important for other frictional assemblies in which the operating conditions permit short-term changeovers of hydrodynamic lubrication into boundary lubrication.

  • Corporate Authors:

    Consultants Bureau

    227 West 17th Street
    New York, NY  United States  10011
  • Authors:
    • Zhdanov, I P
    • Podol'skii, Y Y
    • Tsurkan, I G
  • Publication Date: 1977-3

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00174190
  • Record Type: Publication
  • Source Agency: Engineering Index
  • Files: TRIS
  • Created Date: May 18 1978 12:00AM