We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
Flow characteristics of external gear pumps considering trapped volume.
- Authors
Xiaoru Hao; Xiaojun Zhou; Xiaoguang Liu; Xiaohu Sang
- Abstract
This article investigates the volume change law of trapped fluid in the meshing process and the flow characteristics of external gear pumps under the following two cases: the pump design with and without relief groove. In this study, a mathematical modeling of gear pairs is deduced based on the meshing theory and a complete set of mathematical equations of tooth profile, and the flow rate equation is derived based on law of conservation of mass across the changing boundaries of a control volume. During the process, the function of the pump displacement is established, which is formed by two parts: tooth space volume and trapped volume. In addition, using a control volume approach, the trapped volume and flow rate characteristics of the pump under different design parameters of gears are discussed. The results show that the curve of trapped volume is similar to a parabola and the pump designed with a large number of teeth, module, and pressure angle easily obtained good flow rate characteristics under the same condition, which have a great benefit for designing the relief grooves and external gear pumps.
- Subjects
GEAR pumps; FLUID flow; MATHEMATICAL models; GEARING machinery dynamics; FLOW velocity; ISOBARIC processes
- Publication
Advances in Mechanical Engineering (Sage Publications Inc.), 2016, Vol 8, Issue 10, p1
- ISSN
1687-8132
- Publication type
Article
- DOI
10.1177/1687814016674100