AMESim Based Numerical Analysis for Electrohydraulic Exciter Applied on New Tamper

Tamper, the core equipment of tamping vehicle, is used to complete the work of maintenance and construction in the railway field. Based on international tamping technology and existing problems, a new type of electrohydraulic exciter applied on the tamper is proposed. It mainly consists of spin valve with high speed and micro-displacement double-functioned hydraulic cylinder. In this paper, AMESim Based Dynamic Modeling is carried out to early explore the relationship between operating frequency, axial conducting width of valve orifice and the displacement, velocity, acceleration, vibration force, load pressure, load flow rate. The results indicate that the new electrohydraulic exciter can meet the design requirement well and realize the flexible adjustment of amplitude and frequency through rotational speed control of step motor. Therefore, it adapts to different working environment including hardened ballast and loose ballast. This simulation can not only enrich relative researches of electrohydraulic exciter, but also provide theoretical foundation and practical direction for optimization of device design.