Sökning: "skf bearings"

Visar resultat 1 - 5 av 6 avhandlingar innehållade orden skf bearings.

  1. 1. Energy Harvesting for Smart-Internet-Connected Bearings

    Författare :Fredrik Häggström; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Industrial Electronics; Industriell elektronik;

    Sammanfattning : With the number of interconnected devices, many of which being wireless, exceeding the human population, there is a need to power resource-constrained devices through means other than disposable batteries. Harvesting ambient energy from the vicinity of the device is one solution. LÄS MER

  3. 2. Adaptive Geometric Numerical Integration of Mechanical Systems

    Författare :Klas Modin; Matematik LTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; multibody dynamics; Geometric numerical integration; rolling bearing simulation; adaptive time-stepping; variable time-step;

    Sammanfattning : This thesis is about structure preserving numerical integration of initial value problems, i.e., so called geometric numerical integrators. LÄS MER

  4. 3. Bearing lubrication of refrigeration screw compressors

    Författare :Roger Tuomas; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Maskinelement; Machine Elements;

    Sammanfattning : The bearings in a modern refrigeration screw compressor are lubricated with a mixture of oil and refrigerant. However, little or no published bearing life data is available for the new generation non-chlorinated refrigerants. LÄS MER

  5. 4. Effect of water contamination on the diffused content of hydrogen under stress in AISI-52100 bearing steel

    Författare :Tajammal Imran; Maskinelement; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; vacuum technology; hydraulics; Mechanical engineering; materialteknik; Materiallära; Material technology; Hydrogen Diffusion; Rolling Element; Machine Elements; Tribology; Hydrogen Embrittlement; vibration and acoustic engineering; Maskinteknik; hydraulik; vakuumteknik; vibrationer; akustik;

    Sammanfattning : Abstract Hydrogen embrittlement is a degradation process of mechanical/tribological properties (toughness, wear etc.) of mating steel surfaces. This is caused by the presence and interaction of hydrogen with applied stresses. Therefore, it is important to quantify the hydrogen content which could be dissolved under applied stresses in steel. LÄS MER

  7. 5. 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