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2012 (Swedish)Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

To be able to offer their customers a more compact tiltrotator with a greater tilt angle, Indexator has started investigating the possibility to utilize a hydraulic rotary actuator for the tilting action instead of the current solution using hydraulic cylinders. The goal of this project has been to suggest a number of ways to improve the produced torque of a commercially available actuator by 25 % and thereby be able to meet the requirement of the applications Indexator’s products face in everyday situations. To be able to present accurate ways of improving the produced torque a theoretical model has been developed. This model calculates the torque based on the geometry of the components, the hydraulic pressure and the friction in the sliding contacts within the actuator. The model also contains an estimation of the stresses that arise in different areas of the components, for example the bending stress of the spline teeth and the torsional stress of the shaft. To verify this model, the results of these calculations are compared to the data specified for a commercially available unit and with FE-analyses of the components. In the later parts of this report a calculation of the total angular displacement can also be found. In the second to last chapter of this report, four individual ways of increasing the torque to the desired level is presented as well as some suggestions on how the spline teeth of such a rotary actuator could be manufactured.

Place, publisher, year, edition, pages
2012. , 60 p.
Keyword [en]
Keyword [sv]
URN: urn:nbn:se:ltu:diva-50188Local ID: 777e0d37-5d14-405c-870e-731c620d23bdOAI: diva2:1023545
Subject / course
Student thesis, at least 30 credits
Educational program
Mechanical Engineering, master's level
Validerat; 20120625 (anonymous)Available from: 2016-10-04 Created: 2016-10-04Bibliographically approved

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