Sökning: "machine elements"

Visar resultat 16 - 20 av 253 avhandlingar innehållade orden machine elements.

  1. 16. Journal bearing design, lubrication and operation for enhanced performance

    Författare :Gregory F Simmons; Rob Dwyer-Joyce; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Maskinelement; Machine Elements;

    Sammanfattning : The increasing introduction of intermittent power sources combined with the de-regulation of electricity markets has led to increased instability in the electrical grid. This has led to increased start-up and shutdown of regulating power sources such as hydro-electric power plants and operation at non-ideal operating states both of which increase the wear and tear on machines. LÄS MER

  3. 17. Rough surface elastohydrodynamic lubrication and contact mechanics

    Författare :Andreas Almqvist; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Maskinelement; Machine Elements;

    Sammanfattning : In the field of tribology, there are numerous theoretical models that may be described mathematically in the form of integro-differential systems of equations. Some of these systems of equations are sufficiently well posed to allow for numerical solutions to be carried out resulting in accurate predictions. LÄS MER

  4. 18. Computational fluid dynamics in theoretical simulations of elastohydrodynamic lubrication

    Författare :Torbjörn Almqvist; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Maskinelement; Machine Elements;

    Sammanfattning : The work presented in this thesis concerns computer simulations of lubrication processes, and the main part deals with simulations in the elastohydrodynamic lubrication (EHL) regime. The thesis summarises the work performed in the five papers referred to as Paper A, B, C, D and E. LÄS MER

  5. 19. Wet clutch friction reliability : influence of water contamination and system design

    Författare :Nowshir Fatima; Donald McCarthy; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Maskinelement; Machine Elements;

    Sammanfattning : Wet clutches are machine components using friction to transfer torque and providing interruptible connection between rotating shafts in different automobile applications including automatic transmissions. Like any friction generating machine components, wet clutches are susceptible to continuous wear and degradation during sliding. LÄS MER

  7. 20. Lubrication mechanism of hydrocarbon-mimicking ionic liquids

    Författare :Erik Nyberg; Ichiro Minami; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; P-SiSO; boundary film; silicate; friction; wear; anti-wear; friction modifier; base fluid; Maskinelement; Machine Elements;

    Sammanfattning : Lubrication is critical in order to achieve high efficiency and reliability of machine elements such as gears, bearings, and other moving mechanical assemblies (MMA). In space applications, tribological properties of lubricants are quickly growing more important. LÄS MER