Evaluation of Tooth Space Pressure and Incomplete Filling in External Gear Pumps by Means of Three-Dimensional CFD Simulations

Alessandro Corvaglia, Massimo Rundo, Paolo Casoli and Antonio Lettini
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Alessandro Corvaglia: Department of Energy, Politecnico di Torino, 10129 Turin, Italy
Massimo Rundo: Department of Energy, Politecnico di Torino, 10129 Turin, Italy
Paolo Casoli: Department of Industrial Engineering, University of Parma, 43124 Parma, Italy
Antonio Lettini: Casappa SpA, Lemignano di Collecchio, 43044 Parma, Italy

Energies, 2021, vol. 14, issue 2, 1-16

Abstract: The paper presents the computational fluid dynamics simulation of an external gear pump for fluid power applications. The aim of the study is to test the capability of the model to evaluate the pressure in a tooth space for the entire shaft revolution and the minimum inlet pressure for the complete filling. The model takes into account the internal fluid leakages and two different configurations of the thrust plates have been considered. The simulations in different operating conditions have been validated with proper high dynamics transducers measuring the internal pressure in a tooth space for the entire shaft revolution. Steady-state simulations have been also performed in order to detect the fall of the flow rate due to the incomplete filling of the tooth spaces when the inlet pressure is reduced. It has been demonstrated that, despite the need of a compromise for overcoming the limitation of considering fixed positions of the gears’ axes and of the thrust plates, significant results can be obtained, making the CFD approach very suitable for such analyses.

Keywords: fluid power; external gear pump; CFD; pressure ripple; incomplete filling; cavitation (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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