叶片式液压减振器流场特性仿真研究

Simulation Research for Flow Field Characteristics of Vane Damper

叶片式液压减振器内部流场特性对减振器的阻尼工作性能优劣至关重要。根据叶片式液压减振器结构特性及工作原理,建立叶片式液压减振器无缝隙流场仿真模型与有缝隙流场仿真模型,并考虑减振器的粘温特性,确定减振器的流场特性,为准确研究减振器阻尼特性奠定基础。模拟得到了叶片式液压减振器模型在不同速度激励、油液温度下,相邻高、低压腔内压差大小及变化规律。结果表明,缝隙与油液温度对流场特性的影响非常明显,在进行叶片式液压减振器内部流场特性分析时,需要重点考虑,才能更为准确地把握叶片式液压减振器内部的流场特性与工作性能。该研究的研究方法可以推广到其他类型液压减振器的内部流场研究中。

The internal flow field characteristic of vane damper is very important for a good damping performance. On the basis of structure characteristic and working principle of vane damper and considering the viscosity-tempera- ture characteristic, the simulation models of vane damper with slot leakage and without it are built, which lays the foundation for study of the damping characteristic. The pressure difference and change between high-pressure chamber and low-pressure chamber at different speed excitation and oil temperature are obtained. The results show that, the slot leakage and oil temperature have obvious influence on the flow field characteristics, which should be taken into serious consideration, in order to have a better understanding of vane damper flow field characteristic and work- ing performance. The research method can be expanded to other hydraulic damper flow field study.