Numerical and experimental studies on flow performances and hydraulic radial forces of an internal gear pump with a high pressure

Engineering Applications of Computational Fluid Mechanics

卷:13

Le-Qin Wang¹  Jian-Guo Gong²  Kang An³  Ying-Yuan Liu³  Hui Liu³ 

[1] Institute of Process Equipment, Zhejiang University;

[2] School of Mechanical and Power Engineering, East China University of Science and Technology;

[3] The College of Information, Mechanical and Electrical Engineering, Shanghai Normal University;

关键词: internal gear pump;    dynamic mesh;    gear engagement;    pressure pulsation;    radial force;   

DOI  :  10.1080/19942060.2019.1666746

来源: DOAJ

【 摘 要 】

Unbalanced radial force is one of the most urgent issues for internal gear pumps (IGPs) working at high working pressures. A numerical model for the prediction of the unbalanced radial force is essential for the structural design of gear pumps, facing the challenges of gear engagement description, dynamic mesh method, and so on. In this work, a three-dimensional computational fluid dynamics model of an IGP with a high working pressure was established based on the 2.5-dimensional dynamic mesh method, with cavitation and gear engagements included. The flow behavior and the hydraulic radial force of the high-pressure IGP were studied, and experiments for pump performances were conducted for comparisons. Results indicated that the numerical model could provide a reasonable solution of the flow rate and pressure pulsation for the high-pressure IGP, verified by the experimental data. The circumferential pressure distribution of the pump does not increase linearly, but presents a stepped increase. The hydraulic radial force fluctuates with gear rotation, and its value increases with the working pressure.

【 授权许可】

Unknown