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| Experiment for mechanic characteristic parameters of air spring with auxiliary chamber |
| College of Engineering, Nanjing Agricultural University, Nanjing, Jiangsu 210031, China） |
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Abstract In order to reveal the dynamic characteristics of air spring with auxiliary chamber, the experimental system of air spring with auxiliary chamber was established based on 1T15M -2 type air spring, and the effects of spring mass, orifice diameter and auxiliary chamber volume on effective stiffness, effective damp and natural frequency of system were studied by damped free vibration. Experimental results show that, when operational height of air spring is kept constant, the effective stiffness of air spring increases with the increase of spring mass, but the changes of spring mass have little effect on both damp ratio and natural frequency. With the increase of orifice diameter, effective damp ratio first increase, and then decreases. Both the effective stiffness and natural frequency will decrease from the maximum values to the minimum values rapidly within the diameters of orifice from 4ram to 7ram. When the volume of auxiliary chamber is 2 - 3 times less than that of air spring, increasing auxiliary chamber volume will contribute to the decreasing of effective stiffness and natural frequency. Under the effective action of orifice, effective damp ratio will increase obviously with the increase of auxiliary chamber volume
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2010, Vol. 31 
