Study of the Vibrations in a Rotary Weight Filling Machine

Objective: this paper presents an experimental study of the vibration phenomena in the dynamic weighing system of an automatic rotary filling machine for fluids. The study aims at the sensitivity analysis of the environmental vibrations when the operating conditions of the machine vary and at the identification of the principal causes of excitation. Methods: numerous experimental tests have been carried out on a dedicated test bench and on a complete machine with sixteen stations. For a filling station the load cell signal and the acceleration of the plate that supports the bottle have been acquired and studied. A one-degree of freedom model with varying mass has been implemented in a dedicated software in Delphi language for the vibration modelling. Results: a detailed sensitivity analysis has been developed. The model has allowed a deeper understanding of the phenomena that occur. It also showed the potentiality to be used for the vibration prediction in a compensation process.