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Experimental Thermal Analysis of Hydraulic System in a Special Vehicle  

Choi, Yu Hyun (원광대학교 기계자동차공학부 대학원)
Lee, Sang Ho (원광대학교 기계자동차공학부)
Publication Information
Journal of the Korean Society of Mechanical Technology / v.13, no.4, 2011 , pp. 85-91 More about this Journal
Abstract
Experimental analysis has been carried out to investigate thermal characteristics of hydraulic system in special vehicles. Hydraulic system performance is largely influenced by oil temperature, and there are considerable performance decline and malfunctions in the system for high temperature conditions caused by heavy load and continuous operation. Transient oil temperature and pressure variation are analyzed and heat generation rates in the several main system parts are compared for various flow rates. With the start of system operation oil temperature gradually increases, and viscosity deceases by about 70% as temperature increases from $20^{\circ}C$ to $80^{\circ}C$. Operation pressure in the hydraulic system decreases with oil temperature, and its variation rate becomes less steep as oil temperature increases. Heat generation rate in hydraulic pump also depends on the oil temperature, and it reaches maximum near $50^{\circ}C$. These results in this study can be applied to optimal design of efficient hydraulic system in special vehicles.
Keywords
Special Vehicle; Hydraulic System; Thermal Characteristics; Oil Temperature; Heat Generation;
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Times Cited By KSCI : 1  (Citation Analysis)
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