Journal of the Korean Society of Mechanical Technology (한국기계기술학회지)

Korean Society of Mechanical Technology (한국기계기술학회)
권호 표지

Experimental Thermal Analysis of Hydraulic System in a Special Vehicle

특장차량 유압시스템 내 열적 특성 분석

  • 최유현 (원광대학교 기계자동차공학부 대학원) ;
  • 이상호 (원광대학교 기계자동차공학부)
  • Received : 2011.11.18
  • Accepted : 2011.12.23
  • Published : 2011.12.31
⟨ Previous Next ⟩

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

Acknowledgement

Supported by : 원광대학교

References

  1. Park, J. S., Kim, I. S., Jeong. Y. J., Son, J. S., and An, Y. H., 1997, "The Effects of Dynamic Viscosity and Load of Hydraulic Oil on Pressures," Procedings of the KSPE 1997 Fall Annual Meeting, pp. 573-576.
  2. Park, J. S., Kim, I. S., Park, C. A., Song, C. J. and An, Y. H., 1998, "The effects of Load of Hydraulic Oil on Hydraulic Mechanism," Procedings of the KSMT 1998 Fall Annual Meeting, pp. 72-76.
  3. Park, J. Y., Kim, J. H., Jeong, C. J. and Yoo, Y. T., 1999, "A Study on the Dynamic Response Considering Temperature Change in Hydraulic Pipe Lines ," Procedings of the KSME 2009 Fall Annual Meeting, pp. 224-229.
  4. Choi, Y. H., Lee, Y. W., Lee, T. K., Jung, Y. H., and Park, Y, k., 2010, "A Study on the Flow Characteristic of the Oil Pump with the Motor," Procedings of the KSME 2010 Fall Annual Meeting, pp. 3134-3139.
  5. Kim, H. E., Lee, G. C. and Kim, J. H., 2010, "A Study of the Variation in Intensifier Performance Characteristics Varying with Pressure and Temperature," Trans. of the KSME(A), Vol. 34, No. 9, pp. 1137-1338.
  6. Lee, E. C., Lee, Y. C., Lee, J. S., Kim, H. T., Choi, Y. J. and Lee, J. H., 2008, "Performance Characteristic Analysis of Gear Pump with High Temperature and High Viscosity," Procedings of the KSPE 2008 Spring Annual Meeting, pp. 699-700.
  7. Esposito, A., 2009, Fluid Power With Applications, Scitech, Pajoo, pp. 445-450.