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

Energies

Antonio Lettini¹  Massimo Rundo²  Alessandro Corvaglia²  Paolo Casoli³ 

[1] Casappa SpA, Lemignano di Collecchio, 43044 Parma, Italy;Department of Energy, Politecnico di Torino, 10129 Turin, Italy;Department of Industrial Engineering, University of Parma, 43124 Parma, Italy;

关键词: fluid power;    external gear pump;    CFD;    pressure ripple;    incomplete filling;    cavitation;   

DOI  :  10.3390/en14020342

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown