Sökning: "bearing surface pressure"

Visar resultat 16 - 20 av 33 avhandlingar innehållade orden bearing surface pressure.

1. 16. Parameters affecting the functionality of additives in lubricated contacts : effect of base oil polarity

   Författare :Aldara Naveira Suarez; Luleå tekniska universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Maskinelement; Machine Elements;

   Sammanfattning : Traditionally rolling contact fatigue observed in bearing field applications was subsurface initiated. However, despite the improvement of steel properties, some factors such as downsizing in bearing design, extreme loading of the bearings as well as demanding application conditions (start up-stop cycles) have led to an increase on the cases of surface damage related to surface initiated fatigue, that comes basically from surface distress. LÄS MER

3. 17. The behaviour of antiwear additives in lubricated rolling-sliding contacts

   Författare :Aldara Naveira Suarez; Nicholas D. Spencer; Luleå tekniska universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Maskinelement; Machine Elements;

   Sammanfattning : Traditionally rolling contact fatigue observed in bearing field applications was subsurface initiated. However, despite an improvement in the properties of steel, some factors such as downsizing in bearing design, extreme loading of bearings as well as demanding application conditions (start-stop cycles) have led to an increase in cases of surface damage related to surface initiated fatigue, which essentially comes from surface distress. LÄS MER

4. 18. Thermohydrodynamics of sliding contacts with textured surfaces

   Författare :Samuel Cupillard; Paul Allaire; Luleå tekniska universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Maskinelement; Machine Elements;

   Sammanfattning : Hydrodynamic sliding contacts like those found in journal or thrust bearings are frequently encountered in various types of machinery from computers to large turbines. These contacts, involving a variation in film thickness, are used to generate pressure in the lubricant film and separate the surfaces in relative motion. LÄS MER

5. 19. Lubrication, contact mechanics and leakage between rough surfaces

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

   Sammanfattning : Mechanical components with interacting surfaces are central in everyday life. Interactions between surfaces, such as the sliding, rolling and bouncing, on one another may be found everywhere. These surfaces are often required to withstand severe conditions resulting in wear, which may ultimately lead to failure. LÄS MER

7. 20. Compression uniformity measurements on coated anduncoated paper surfaces

   Författare :Isabel Endres; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Chemical Engineering; Kemiteknik;

   Sammanfattning : Paper is exposed to compressive stresses at several occasions in its production process and in subsequent printing operations. In the press section of a paper machine, the fibre web is mechanically dewatered by compression. LÄS MER