Thermodynamic Modeling and Simulation Analysis of Double-tube Damper

Abstract

Abstract At present, most of the special vehicles were also designed with a double-tube damper, which was characterized by convenient installation and low cost. However, due to the design of the oil storage cavity outside the working cylinder, the heat dissipation effect was not ideal, and the working temperature of the oil too high will accelerate the aging of the sealing member, which was also a key problem that plagues the reliability design of the damper. Aiming at the structural characteristics of the double-tube damper, the heat generation mechanism and energy conversion research of the oil were carried out, and the heat transfer coefficient and heat conduction equation of the inner and outer surfaces of the cylinder were derived. The comprehensive heat transfer expression was solved for the working medium, and the thermodynamic model of the double-tube damper was constructed. Finally, the simulation analysis of the influence of different structural parameters on the heat balance temperature were carried out, which could effectively guide the design and development of the damper.