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  • SAGE Publications  (3)
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  • SAGE Publications  (3)
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  • 1
    Online Resource
    Online Resource
    Tribological behavior of grooves textured thrust cylindrical roller bearings under dry wear
    SAGE Publications ; 2021
    In:  Advances in Mechanical Engineering Vol. 13, No. 12 ( 2021-12), p. 168781402110672-
    Details
    In: Advances in Mechanical Engineering, SAGE Publications, Vol. 13, No. 12 ( 2021-12), p. 168781402110672-
    Abstract: To prolong the serve life of roller element bearings (REB) and improve the reliability of mechanical system, the tribological behavior of the “washers-cage-rollers” system of grooves textured thrust cylindrical roller bearings (TCRB, 81107TN) under dry wear was researched. The pattern parameters include: width of grooves (WOG, 50, 100, and 150 μm), depth of grooves (DPOG, 7, 11, and 15 μm), as well as groove deflection angle (GDA, 0°, 45°, 90°, and 135°). The influence mechanism of grooves on the tribological properties of REBs is discussed. The results show that: As the GDA is 45°, the coefficient of friction (COF) and mass loss of bearing is the lowest among four angles. The average COFs of grooves textured bearings are much higher than that of smooth one, and their mass losses are all lower than that of smooth bearing. The influence of pattern parameters on the surface stresses of grooves textured bearings is weak. In this work, when the WOG is 50 μm and the DPOG is 7 μm, the wear loss of grooves textured bearing is the lowest, reduced by up to 75.6%. This work can provide a valuable reference for the raceway design and optimization of REBs.
    Type of Medium: Online Resource
    ISSN: 1687-8140 , 1687-8140
    URL: Article
    DOI: 10.1177/16878140211067284
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2021
    detail.hit.zdb_id: 2501620-9
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    Online Resource
  • 2
    Online Resource
    Online Resource
    The influence of initial deflection angle on the tribological properties of gray cast iron rings with curve distributed pits under dry sliding
    SAGE Publications ; 2021
    In:  Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology Vol. 235, No. 8 ( 2021-08), p. 1659-1668
    Details
    In: Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology, SAGE Publications, Vol. 235, No. 8 ( 2021-08), p. 1659-1668
    Abstract: This study presents the influence of initial deflection angle (IDA) on the tribological properties of gray cast iron (GCI) rings with curve distributed pits in the radial direction (CDPRD). The thermal behavior of pits textured GCI rings with different initial deflection angles (0°, 30°, 45°, 60°, 75°) and fixed deflexional angle of adjacent pits (DAAP, 10°) were researched, through APDL programming. A pin-on-disc wear test rig was used to reveal the anti-wear performance of samples under dry sliding, at a rotating speed of 200 rpm, with a normal load of 70 N. An electronic balance and an optical microscope (OM) were used to obtain their wear losses and worn surfaces, respectively. The results show that: comparing with the smooth GCI ring, there are evident high temperature regions between two adjacent pits groups, called “temperature barrier and separation effect”. Among all textured samples, the von Mise’s stress of IDA45 is the most stable, and its temperature is almost the lowest. The friction coefficient curve and the wear loss of IDA45 are also the lowest, and much lower than the loss of smooth GCI ring, indicating the excellent anti-wear performance. This work can provide a valuable reference for the surface design of journal bearings.
    Type of Medium: Online Resource
    ISSN: 1350-6501 , 2041-305X
    URL: Article
    DOI: 10.1177/1350650120972293
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2021
    detail.hit.zdb_id: 2032767-5
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  • 3
    Online Resource
    Online Resource
    Wear behavior of pits textured grey cast iron rings with Zr/ZrN coatings under dry sliding
    SAGE Publications ; 2021
    In:  Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology Vol. 235, No. 6 ( 2021-06), p. 1251-1261
    Details
    In: Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology, SAGE Publications, Vol. 235, No. 6 ( 2021-06), p. 1251-1261
    Abstract: This study presents the influence of Zr/ZrN coatings on the tribological performance of pits textured grey cast iron parts under dry sliding. A laser marking system and a physical vapor deposition equipment were applied to manufacture pits textured grey cast iron rings combined with Zr/ZrN coatings. A pin-on-disc wear test rig was used to reveal the wear behavior of samples under dry wear condition, at a rotating speed of 200 r/min, with a normal load of 70 N. The wear losses and the worn surfaces of all rings were obtained by an electronic balance and a three-dimensional surface profilometer, respectively. The results show that Zr/ZrN coatings can significantly increase the surface roughness and surface hardness of grey cast iron rings. As a result, Zr/ZrN coatings increase the friction coefficients of all coated GCI rings, and reduce the wear losses of some ones. In this work, when surface texturing combines with Zr/ZrN coatings, the final tribological properties of coated grey cast iron rings may be either improved or deteriorated, depending on surface characteristics, texturing parameters and loads. Compared with the uncoated smooth grey cast iron ring, Zr/ZrN coatings cannot effectively improve the wear behavior of pits textured samples. Among all coated grey cast iron rings, when the diameter of the pit is 0.8 mm, and the distance between pits is 1.25 mm, the pits textured grey cast iron ring can provide the optimal anti-wear performance. This work would provide a valuable reference for the surface design of journal bearings and roller bearings.
    Type of Medium: Online Resource
    ISSN: 1350-6501 , 2041-305X
    URL: Article
    DOI: 10.1177/1350650120940915
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2021
    detail.hit.zdb_id: 2032767-5
    Location Call Number Limitation Availability
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    Online Resource
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