Sökning: "Shaft"

Visar resultat 21 - 25 av 158 avhandlingar innehållade ordet Shaft.

1. 21. Prevention of Hip Dislocation in Children with Cerebral Palsy

   Författare :Maria Hermanson; Lund Ortopedi; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Cerebral palsy; Hip; Hip displacement; Head-shaft angle; CPUP hip score;

   Sammanfattning : .... LÄS MER

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

   Författare :Björn Larsson; Patrick Keogh; Linköpings universitet; []
   Nyckelord :;

   Sammanfattning : 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. LÄS MER

4. 23. Surface integrity on post processed alloy 718 after nonconventional machining

   Författare :Jonas Holmberg; Tomas Beno; Anders Wretland; Johan Berglund; Mikael Olsson; RISE; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Alloy 718; Non-conventional machining; post processing; surface integrity; Microstructure; Residual stress; Electron back scattering diffraction; Material removal rate; Manufacturing; Surface and Joining Technology; Bearbetnings-; yt- och fogningsteknik; Production Technology; Manufacturing and materials engineering;

   Sammanfattning : There is a strong industrial driving force to find alternative production technologies in order to make the production of aero engine components of superalloys even more efficient than it is today. Introducing new and nonconventional machining technologies allows taking a giant leap to increase the material removal rate and thereby drastically increase the productivity. LÄS MER

5. 24. Power Extraction in Military Aircraft

   Författare :Daniel Rosell; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; engine performance; mixed flow; turbofan engine; low bypass ratio; Fighter aircraft performance; power extraction;

   Sammanfattning : Military aircraft require more and more power. Pneumatic and hydraulic systems are being replaced by electrical equipment and new, power consuming equipmentis introduced in the aircraft. Increased power extraction brings new challenges for the aircraft jet engine, both in terms of operability and with regards to engine performance. LÄS MER

7. 25. Measurements and Modelling of Low-frequency Disturbances in Induction Machines

   Författare :Torbjörn Thiringer; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Modelling; induction machine; measurements;

   Sammanfattning : in this thesis the low-frequency dynamic behavior of the induction machine is analyzed. disturbances in the shaft torque and supply voltage are investigated theoretically, The calculated response to shaft torque disturbances is verified with measurements on a 15 kW machine. LÄS MER