Volume 42, Issue 6 (November 2014)

    Rheological Characteristics of a New Kind of Friction-Promoting Grease

    (Received 3 June 2013; accepted 30 December 2013)

    Published Online: 2014

    CODEN: JTEOAD

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    Abstract

    The main objective of this work was to study the rheological characteristics of a newly developed friction-promoting grease (FPG) in China that has been widely used for the lubrication and protection of multi-rope friction hoists. A stereo microscope was used to determine the microstructure of the grease. A series of rheological tests were performed on a cone-plate rheometer to investigate the thixotropic shear-thinning behavior under several constant temperature conditions and examine the changes in the apparent viscosity when the temperature is increased while the shear rate is kept constant. Experimental results indicated that within the temperature range of 20°C to 30°C, a lower temperature could lead to a stronger thixotropy of the FPG. Within the temperature range of 20°C to 160°C, a lower temperature could result in a greater yield stress and a more intense shear-thinning behavior of the FPG, which was in good agreement with Sisko’s model. It should be noted that at 170°C and 180°C, the apparent viscosity showed a slightly ascending trend at low shear rates and a stable value was gradually approached as the shear rate increased. Under a constant shear rate, the apparent viscosity remained stable after decreasing and then finally increased with an increase in the temperature.


    Author Information:

    Ma, Wan
    School of Mechatronic Engineering, China Univ. of Mining and Technology, Xuzhou,

    Zhu, Zhencai
    Professor, School of Mechatronic Engineering, China Univ. of Mining and Technology, Xuzhou,

    Peng, Yuxing
    Associate Professor, School of Mechatronic Engineering, China Univ. of Mining and Technology, Xuzhou,

    Chen, Guoan
    Associate Professor, School of Mechatronic Engineering, China Univ. of Mining and Technology, Xuzhou,


    Stock #: JTE20130140

    ISSN: 0090-3973

    DOI: 10.1520/JTE20130140

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    Author
    Title Rheological Characteristics of a New Kind of Friction-Promoting Grease
    Symposium , 0000-00-00
    Committee E37