Search for dissertations about: "Temperature bearings"

Showing result 1 - 5 of 40 swedish dissertations containing the words Temperature bearings.

  2. 1. Rolling bearing lubrication at low temperature

    Author : Victoria Wikström; Luleå tekniska universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Maskinelement; Machine Elements;

    Abstract : Problems connected with rolling bearings at low temperatures are high starting and running friction, concerns about the presence of a lubricating film and the degree of roller slip at low-temperature start-up. Also, questions have been raised whether the high shear stresses in a grease sheared at low temperature could cause thickener degradation. READ MORE

  4. 2. Application of monitoring to dynamic characterization and damage detection in bridges

    Author : Ignacio Gonzalez; Raid Karoumi; Eugene O'Brien; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Structural health monitoring; Traffic monitoring; Bridge monitoring; Bridge Weigh-In-Motion; BWIM; Damage detection; Suspension bridge bearings; Axle loads; Dynamics; Temperature effect;

    Abstract : The field of bridge monitoring is one of rapid development. Advances in sensor technologies, in data communication and processing algorithms all affect the possibilities of Structural Monitoring in Bridges. READ MORE

  5. 3. Properties of oil and refrigerant mixtures : lubrication of ball bearings in refrigeration compressors

    Author : Roger Tuomas; Luleå tekniska universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Machine Elements; Maskinelement;

    Abstract : A refrigeration compressor contains highly loaded mechanical contacts that have to be lubricated. The lubricant used in refrigeration compressors consists of an oil and refrigerant mixture, and the refrigerant concentration can be up to 40 wt%. READ MORE

  6. 4. Non-stationary rotor vibrations due to assymmetric temperature from skew heating in bearings and seals

    Author : Björn Larsson; Patrick Keogh; Linköpings universitet; []
    Keywords : ;

    Abstract : The genesis of this thesis is physical observations of slow alterations of synchronous rotor vibrations over time. It can lead to problems such as difficulties in performing proper balancing and unacceptably high vibration levels. The cause is often asymmetric heating of the rotor shaft. READ MORE

  7. 5. On failure of high strength steel bridge roller bearings

    Author : Pourya Noury; Ove Lagerqvist; Kjell Eriksson; John Yates; Luleå tekniska universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Stålbyggnad; Steel Structures;

    Abstract : This thesis is concerned with failure analysis of high strength steel bridge roller bearings.Paper Adescribes how the commonly used Hertz formulas for contact stresses underestimate the actual stresses in practice due to temperature differences, misalignments and other construction-related conditions. READ MORE