Virtual Prototyping of Electro-Hydrostatic Modules Equipped with Vane Pumps - Application to Injection Moulding Machines

Abstract : In last years companies’ policy has been focusing on research of more eco-friendly solutions in order to reduce the environmental impact and the consumed energy. The trend has been affecting the stationary machinery in the industrial automation too. It includes the drive technology for motion control in the injection moulding machines. The design studies concern energy efficiency improvement, as well as increased service pressure, shorter cycle time and repeatability over a long period of time. All these requirements have led the drive technology to evolve by increasing the interest for the electro-mechanical and electro-hydrostatic modules (EHM). In this thesis an innovative solution of EHM is proposed that associates industrial inverter, AC brushless servo motor and fixed-displacement low-noise Parker vane pump. In detail, the research interest concerns the development of a system level model of the vane pump. The main objective is to enable assessing the pump energy losses and full module performance in specific phase of machine’s cycle: acceleration, depressurisation and holding pressure phases. Firstly analysed by means of analytical approach, dynamics are then evaluated through more advanced models based on virtual prototyping built in LMS-AMESim environment. The advantages on predicting the EHM performance and on estimating the unknown fundamental parameters (e.g. Bulk Modulus and fluid air content) are showed through comparison with experimental results obtained in laboratory. The cavitation/aeration phenomena are also taken into account during acceleration transients and models are thus developed in order to predict the operating conditions which promote these phenomena. Energy behaviour of the EHM is then analysed by means of thermal hydraulic models able to determine the heat exchanges between module components and environment.
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  • HAL Id : tel-02059681, version 1

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Emanuele Gnesi. Virtual Prototyping of Electro-Hydrostatic Modules Equipped with Vane Pumps - Application to Injection Moulding Machines. Mechanical engineering [physics.class-ph]. INSA de Toulouse, 2015. English. ⟨NNT : 2015ISAT0051⟩. ⟨tel-02059681⟩

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