Candidate: Alisson Dalsasso Corrêa de Souza
Program: UFSC / POSMEC
Date: May, 2010
Advisor: Victor Juliano De Negri
Abstract: In recent years, the hydraulic control systems innovations have been relapsing mainly in improvements accomplished on concept of valves commercially consolidated. In larger part, such efforts come from enhancements in the mechanical design, in the control algorithms and in the digital electronics and electromechanical devices incorporation. In turn, this thesis proposal deals with the investigation of the continuous flow control in hydraulic circuits through a new concept that explores the reactance effects of the system. For that, a valve called preliminarily IRV (Inertial Rotary Valve) was used as a reference for the study. Differently from conventional solutions, there is no static opening and closing of control orifices in this continuous control valve. As a result, this research focuses on issues related to computational fluid dynamics (CFD). In particular, the employment of ANSYS CFX tool enables the achievement of accurated models of the fluid flow within the valve. Moreover, the LMS Imagine.Lab AMESim software is used to optimize the design of IRV as well as to simulate its behavior in hydraulic positioner systems. In this context, one intends to show that the principle, on which the valve concept of this work is based on (the inertial effect of the fluid), stands out as an innovative way in the hydraulic control systems field. Finally, the conclusions of this study allow to verify the applicability of this flow control approach in some hydraulic circuits as well as envisioning new concepts with similar operation principles.
SOUZA, A. D. C. de. Aprimoramento e caracterização do comportamento operacional de uma válvula rotativa inercial. 2010. Tese (Programa de Pós Graduação em Engenharia Mecânica), 212 p. – Universidade Federal de Santa Catarina: Florianópolis.