具有隔、吸振双功能减振装置的设计与试验

Design and Test of Damping Devices with Vibration Isolation and Vibration Absorption Functions

人们长期以来习惯于把隔振与吸振分割开来,把隔振器和吸振器当成两种不同的振动控制装置分开使用。尽管隔振器能够隔离大部分的振动传递,但是某些机械设备的残余振动仍旧明显。基于现有隔振台座以及橡胶动力吸振器提出一种新的具有隔、吸振双功能的减振装置。在台座内部预制空腔,在空腔底部中央位置预埋支撑杆,在支撑杆上安装橡胶动力吸振器,橡胶动力吸振器不与动力设备发生空间冲突。实验结果表明:当激振频率在吸振器固有频率附近一定范围内漂移时,安装吸振器工况与未安装吸振器工况相比,减振装置的减振效果均有所提高,而且越接近固有频率时减振效果越明显,该减振装置值得尝试。

People are used to separate vibration isolation from vibration absorption and regard vibration isolators and vibration absorbers as two different vibration control devices.Although vibration isolators can stop most of the vibration transmission,the residual vibration of some mechanical devices is still there.In this study,based on the currently existing isolation platform and rubber dynamic vibration absorber,a new damping device with both functions of vibration isolation and vibration absorption is proposed.A cavity is prefabricated inside the platform and a supporting rod is embedded at the middle of the bottom of the cavity.The rubber dynamic vibration absorber is mounted on the supporting rod to avoid the spatial conflicting with the power equipment.Experimental results show that when the excitation frequency varies within a certain range near the natural frequency of the absorber,the vibration reduction effects are all improved.And the vibration reduction effect becomes much better when the excitation frequency approaches the natural frequency.Therefore,it is the damping device that is worth trying.