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Updated: Sep 3, 2025

A Modeling and Simulation Method for Preliminary Design of an Electro-Variable Displacement Pump
Published on: June 1, 2022
Analysis of straight conjugate internal gear pump through numerical modeling and experimental validation
Hongqiang Chai1, Guolai Yang1, Guoguo Wu1,2
1College of Energy and Power Engineering, Lanzhou University of Technology, Lanzhou, Gansu, China.
This study introduces an orthogonal test method for optimizing oil film design in straight conjugate internal gear pumps (SCIGPs). It determines optimal working clearances to enhance gear pump efficiency and performance.
Area of Science:
- Mechanical Engineering
- Fluid Dynamics
- Tribology
Background:
- Straight conjugate internal gear pumps (SCIGPs) rely on fixed clearances for sealing and lubrication.
- Existing literature lacks research on oil film design for SCIGPs.
- Optimizing clearances is crucial for SCIGP performance.
Purpose of the Study:
- To apply orthogonal testing for SCIGP oil film design.
- To determine optimal working clearances for friction pairs.
- To improve SCIGP efficiency and operating conditions.
Main Methods:
- Development of mathematical models for internal leakage flow and viscous friction loss.
- Application of orthogonal test design for numerical simulations.
- Utilizing a range-method for factor analysis and optimal combination determination.
Main Results:
- Identification of key factors influencing SCIGP performance.
- Determination of optimal working clearances for friction pairs.
- Validation of simulation model accuracy through prototype testing.
Conclusions:
- The developed simulation model and method are applicable for SCIGP design.
- Optimal clearances significantly improve SCIGP efficiency and working conditions.
- The study provides a framework for enhancing gear pump performance.
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