Modeling, simulation and experimental verification of a hydraulic fan drive system

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Tezin Türü: Yüksek Lisans

Tezin Yürütüldüğü Kurum: Orta Doğu Teknik Üniversitesi, Mühendislik Fakültesi, Makina Mühendisliği Bölümü, Türkiye

Tezin Onay Tarihi: 2013

Öğrenci: ERSEN TORAMAN

Danışman: RAİF TUNA BALKAN

Özet:

Environmental factors, global legislations and economic reasons force vehicle industry to produce more efficient systems. Displacement controlled hydraulic fan drive system is one of the energy efficient alternatives for stationary highway vehicles, construction machines and military vehicles that have moderate engine size and less benefit from ram air cooling. In this thesis study, hydraulic fan drive system of a military vehicle is investigated and a dynamic model of the system is developed. MATLAB/Simulink® software, a block diagram environment, is used for model based design and multidomain simulation of mechanical and hydraulic components. Beside the predefined blocks under Simulink® library, custom models are developed, i.e. variable displacement axial piston pump with swash plate dynamics, fan, compensator. In order to verify the developed model, simulation results are compared with experimental data (pressure, flow rate, engine and fan speeds). Then, by the help of the model, effect of orifice sizes on the system performance is investigated. Developed model can be used for deeper understanding behind the hydraulic fan drive system of the vehicle. In addition, if a modification in an existing system is to be made, effect of the alteration can be examined over the model in advance.