Indragningsmekanism för bensin-och dieselpumpar

Sammanfattning: This thesis is produced in association with the company Dover Fueling Solutions, DFS, that is working towards the goal of developing ideas and solutions to optimize every aspect of the fueling process for vehicle fuel. A recurring problem is that the fuel hose from truck dispensers are left on the ground after being used. This can lead to leakage of fuel and increases the risk of being run over by incomming vehicles. The purpose of this thesis is to prevent that a fuel hose, after being used, remains on the ground and that the components preventing this are developed to resist the correct amount of relevant mechanical stresses. Reasonable choices of material for these components must be selected to resist corrosion since the fuel dispensers are placed outdoors. The scope is to design and perform calculations for an automized retraction of the fuel hose after usage and is achieved with the help of methods such as needs-matrixes, generation of concepts, analysis of solid mechanics and CAD. The result is an extension spring that is mounted in a pylon with a circular cross section that is managing the retraction mechanism of the fuel hose. The demarcations and suggestions for future work in this area are discussed and the use of compression springs are suggested as a potential improvement for the retraction mechanism.