关键词: 仪器仪表技术, 双筒式减振器, 热辐射, 热力学模型, 油液温升

Abstract: The heat transfer behavior of the double cylinder shock absorber(DCSA) which is widely used in the vehicle is unsatisfactory.The oil temperature rise which affects the reliability of oil seals significantly is the key problem which must be considered in reliability design of the DCSA.Therefore,a physical model for the heat transfer of the DCSA was built.The calorigenic mechanism of the oil in the DCSA was analyzed,the related convective heat transfer coefficient and the heat conduction equation were derived.Considering the radiation heat trasfer,an overall heat transfer expression was acquired and solved.A thermodynamic model was built for the DCSA based on the energy conservation law.The effects of the absorber cylinder dimensions and the heat radiation emissivity on the oil temperature rise were analyzed by programming of the model,and the obtained results provide a reference for the DCSA design.

Key words: technology of instrument and equipment, double cylinder shock absorber(DCSA), heat radiation, thermodynamic model, oil temperature rise