Sökning: "gear contact"

Visar resultat 16 - 20 av 38 avhandlingar innehållade orden gear contact.

  1. 16. Modelling and Simulation of Gearset Behavior : Effects of Manufacturing Errors and Electrification

    Författare :Rikard Hjelm; Maskinelement; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; electrification; gears; LTCA; tip contact; pitch error; profile slope error; transmission error; tolerance; scrapping; lubrication; TEHL; optimization;

    Sammanfattning : Due to electrification, new demands are imposed on gears regarding e.g., quality, noise, lubrication, and gear ratio.Therefore, a better understanding of gearset meshing and operation is needed. LÄS MER

  3. 17. Towards model-based development of heavy truck synchronizers

    Författare :Daniel Häggström; Ulf Sellgren; Pär Marklund; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; synchronization; synchronizers; gear shift; gearbox;

    Sammanfattning : Gear shifts are becoming more and more important as engines are adapted to low speed and high torque working conditions. Synchronizers are key components for successful gear shifts. To adapt the synchronizers to future engines and thus new working conditions, improved development tools are needed. LÄS MER

  4. 18. Contact fatigue and crack propagation studies of sintered PM steel

    Författare :Anders Holmberg; Åsa Kassman Rudolphi; Urban Wiklund; Johan Ahlström; Uppsala universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Tribology; PM steel; Fatigue; Crack Initiation; Crack Propagation; Material Analysis; Teknisk fysik med inriktning mot tribomaterial; Engineering Science with specialization in Tribo Materials;

    Sammanfattning : Gears made of PM steel are of interest for the automotive industry because from the press/sinter route, complex geometries can be produced to near net shape with only a few processing steps while keeping the material and energy usage at a minimum. However, the PM steels of today have significant performance limitations caused by the inherent porosity which impairs the mechanical properties by acting as stress raisers in the material. LÄS MER

  5. 19. Modelling and laboratory investigations on freight wagon link suspensions with respect to vehicle-track dynamic interaction

    Författare :Per-Anders Jönsson; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; railway; freight wagon; running gear; link suspension; laboratory test; ; Other engineering mechanics; Övrig teknisk mekanik;

    Sammanfattning : The link suspension is the most prevailing suspension system for freight wagons in central and western Europe. The system design is simple and has existed for more than 100 years. However, still its characteristics are not fully understood. LÄS MER

  7. 20. On the influence of gear oil properties on pitting life

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

    Sammanfattning : Increasing demands on the automotive industry to produce fuel-efficient vehicles has led the industry to explore different approaches, including reducing power losses and improving fuel efficiency of engines. The goal of this project has been to investigate the possibilities of reducing the frictional losses in drive axles and hypoid gears. LÄS MER