Sökning: "PTFE transfer"

Hittade 5 avhandlingar innehållade orden PTFE transfer.

  1. 1. Tribological Aspects of Pneumatic Clutch Actuators

    Författare :Frida Riddar; Åsa Kassman Rudolphi; Roland Larsson; Uppsala universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Wear; friction; PTFE transfer; anodised aluminium; NBR rubber lip seal; silicone grease; casting; extrusion; Teknisk fysik med inriktning mot tribomaterial; Engineering Science with specialization in Tribo Materials;

    Sammanfattning : A clutch actuator is used in a vehicle to transmit movement and force from the clutch pedal to the release bearing of the clutch. A pneumatic clutch actuator consists of an anodised aluminium cylinder, inside of which a piston, with a rubber lip seal and a PTFE guiding ring, slides. The system is lubricated with silicone grease before assembly. LÄS MER

  3. 2. Tribology of carbon fiber reinforced PTFE composites in dry gas environments

    Författare :Pontus Johansson; Pär Marklund; Marcus Björling; Yijun Shi; Stephen Kukureka; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Machine Elements; Maskinelement;

    Sammanfattning : With hydrogen being one of the key pillars of decarbonization, the reliability and efficiency of hydrogen applications become increasingly important. In applications such as oil-free reciprocating hydrogen compressors and Stirling engines, the self-lubricating pistonrings and other dynamic seals are critical components in terms of efficiency, service life and proper functioning. LÄS MER

  4. 3. TRIBOCHEMICAL INTERACTIONS OF A PTFE/ALPHA ALUMINA COMPOSITE AT THE SLIDING INTERFACE: A MECHANISM FOR ULTRA LOW WEAR

    Författare :Kathryn L Harris; USA University of Florida; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : The wear and friction behavior of ultralow wear polytetrafluoroethylene (PTFE)/αalumina composites first described by Burris and Sawyer in 2006 has been studied intensively in the years hence. The mechanisms responsible for the remarkable improvement in wear over unfilled PTFE are not yet fully understood. LÄS MER

  5. 4. Graphene as Solid Lubricant in Polymer Composites : With Application in Hydropower Bearings

    Författare :Julian Somberg; Nazanin Emami; Jan Ukonsaari; Gil Gonçalves; Sergei Glavatskih; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Graphene; Solid Lubricant; Polymer Composite; Friction; Hydropower; Machine Elements; Maskinelement;

    Sammanfattning : With a rising global demand for green energy production, hydropower plays a key role in securing a reliable and sustainable energy supply. Hydropower is the largest and most efficient renewable energy source, with an ever-increasing capacity. LÄS MER

  7. 5. Insulator charging by contact with metals

    Författare :Frank Nordhage; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : In spite of the fact that charge transfer is one of the oldest physical phenomena known, the basic mechanisms involved are not yet quite understood. For experimental investigations of the charge transfer to insulators it is still informative to scrutinize electrification systems consisting of as simple components as possible. LÄS MER