Sökning: "Grease"

Visar resultat 11 - 15 av 35 avhandlingar innehållade ordet Grease.

  1. 11. Condition Monitoring of Water Contamination in Lubricating Grease for Tribological Contacts

    Författare :Nicholas J. Dittes; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Machine Elements; Maskinelement;

    Sammanfattning : The purpose of this thesis is to summarize the research carried out that led to the development of measurement techniques which measure the water content of lubricating grease. A simple and effective grease mixing method for preparing grease samples was developed and tested for repeatability. LÄS MER

  3. 12. Lubricating grease Experiments and modeling of wall-bounded- and free-surface flows

    Författare :Jinxia Li; Arto Lehtovaara; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Maskinelement; Machine Elements;

    Sammanfattning : Lubricating grease is commonly applied to lubricate e.g. rolling bearings, sealsand gears. Grease has some clear advantages over lubricating oil: it is a semisolidmaterial, which prevents it from flowing/ leaking out from the bearingsystem and gives it sealing properties, and it also protects the system fromcontaminants and corrosion. LÄS MER

  4. 13. Lubricant replenishment in the vicinity of an EHD contact

    Författare :Per-Olof Larsson-Kråik; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Maskinelement; Machine Elements;

    Sammanfattning : Lubricants are subjected to high pressures in many mechanical devices - notably gears, cams, piston rings and rolling element bearings. The contact pressure between the ball and the race in a ball bearing can be as high as 5 GPa. LÄS MER

  5. 14. Lubrication of elastohydrodynamic contacts, mainly concerning low temperature

    Författare :Jan Ove Östensen; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Maskinelement; Machine Elements;

    Sammanfattning : The limiting shear stress coefficient has been studied in a impacting ball apparatus for four different lubricating oils at -30ºC and 20ºC. The results show that the most interesting effects are; oil type, maximum contact pressure, temperature, and the interaction between the above mentioned parameters. LÄS MER

  7. 15. Wear reduction performance of rail flange lubrication

    Författare :Patric Waara; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Maskinelement; Machine Elements;

    Sammanfattning : Rail and rail wheel flange wear on the rail track has been a problem of attention for the last 30 years. The problems arise in curves and depend on increased traffic volume, heavier axle load and also higher speed. Axle loads of 22,5-25 ton is common nowadays and the trend is towards heavier axle loads where the next step is 30-35 ton. LÄS MER