Analys av skillnader mellan transmissionsprovning i rigg respektive fält för hjullastare på Volvo Construction Equipment
Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
This thesis aims to find and show the differences between life testing of wheel loader transmissions in rig and field at Volvo Construction Equipment (Volvo CE). In the following text the wheel loader is called the machine. The task has been divided into three parts; Identification of the construction of the rig and how the testing for wheel loader in rig and field is performed today. Analysis of effects of differences in transmission testing between the rig and field. Suggest improvements for the testing today and for future work in this area. The first part of the work was carried out with interviews and a literature study to gain understanding of what has been tested in the current situation and why. During this phase, the stiffness and mass moment of inertia for the powertrain in the rig and the machine was calculated. In the second part of the work a simulation model of the rig was established and the result from the rig and the machine were analysed. In the third part of the work proposals has been stated for redevelopment of the rigging, and general improvements of the test operations has been suggested. The analysis shows that the stiffness of the powertrain in rig is much higher than the equivalent stiffness of the machine. The mass moment of inertia for the powertrain in rig is also considerably larger than the mass moment of inertia for the powertrain in the machine. The simulation model has unfortunately not been able to give some reliable results. The result from the simulations is unreliable due to problems with damping in the simulation model. Analyses of the detected torque from rig and machine runs shows differences, however the biggest difference is a superimposed relatively small torque fluctuation that occurs more frequently in the torque signals for the machine runs than the rig runs. These torque fluctuations have no significant effect for the lifespan of the transmission. Analyses and observations made during this work is a first step towards creating awareness of differences between the transmission testing in rig and the machine at Volvo CE. Further studies in this area will be needed, both to validate this study but also to find other differences for transmission testing of rig and the machine.
Place, publisher, year, edition, pages
2011. , 90 p.
IdentifiersURN: urn:nbn:se:ltu:diva-56305Local ID: d162b41d-4cec-405d-8732-2174f336fb0bOAI: oai:DiVA.org:ltu-56305DiVA: diva2:1029692
Subject / course
Student thesis, at least 30 credits
Mechanical Engineering, master's level
Validerat; 20110614 (anonymous)2016-10-042016-10-04Bibliographically approved