电磁式振动给料机的混合隔振研究

Hybrid Vibration Isolation in Electromagnetic Vibration Feeders

分别对电磁式振动给料机进行了被动隔振和混合隔振的研究。采取被动隔振后,可使振动传递率降低,从而减少其振动对周围其它工作机械的影响,但同时也降低了振动给料机的工作效率。采用混合隔振技术,通过选取合适的主动控制反馈变量和反馈增益,可使电磁式振动给料机的工作效率和振动传递率得到明显改善。当主动控制的反馈变量采用主振质量的振动加速度,并选取与主振质量相等的加速度反馈增益时,系统处于理想隔振状态,此时电磁式振动给料机的振动传递率为零,且系统处于最佳工作效率状态。

Passive vibration isolation and hybrid vibration isolation of electromagnetic vibration feeders were studied. Adopting passive vibration isolation, transmissibility of vibration from electromagnetic vibration feeders and the effect on other equipments can be effectively reduced, but its working efficiency is reduced too. By choosing appropriate feedback variables and feedback gains, the vibration transmissibility and efficiency of electromagnetic vibration feeders can be markedly improved by a hybrid vibration isolation system. When the acceleration of the upper mass is used as the feedback variable and the acceleration feedback gain is equal to the magnitude of the upper mass, the electromagnetic vibration feeder has then the best work efficiency and the vibration transmissibility approaches zero.