Academic Journal of Engineering and Technology Science, 2025, 8(5); doi: 10.25236/AJETS.2025.080512.
Peng Wensheng1, Guo Yong2
1School of Mechanical and Electrical Engineering, Hunan University of Science and Technology, Xiangtan, 411100, China
2Hunan Provincial Key Laboratory of Mechanical Equipment Health Maintenance, Hunan University of Science and Technology, Xiangtan, 411201, China
Straight-conjugate internal gear pumps are widely applied in hydraulic systems due to their compact structure, smooth operation, and high volumetric efficiency. To investigate the influence of tooth-profile chamfering on pump performance, a mathematical model of the chamfered tooth profile was established based on the straight-conjugation principle. A combined approach of numerical simulation and experimental validation was employed to systematically analyze the effects of different chamfer parameters on the internal flow field, pressure distribution, and flow pulsation. The results indicate that an appropriately designed chamfer can significantly improve the pressure gradient and flow stability in the meshing region. Compared with the non-chamfered profile, a 0.5 mm arc chamfer increases the average flow rate by 15%–25% and reduces the flow pulsation rate by approximately 35%, resulting in smoother operation and higher energy efficiency. This study elucidates the mechanism by which chamfering reduces meshing impact and optimizes contact stress, providing a theoretical basis for tooth-profile optimization in high-performance hydraulic gear pumps.
linear conjugate internal gear pump; tooth chamfering; flow field characteristics; flow pulsation; performance optimization
Peng Wensheng, Guo Yong. Numerical Study on the Effect of Tooth Chamfering on the Performance of Linear Conjugate Internal Gear Pumps. Academic Journal of Engineering and Technology Science (2025), Vol. 8, Issue 5: 83-92. https://doi.org/10.25236/AJETS.2025.080512.
[1] Zhao X, Vacca A. Formulation and optimization of involute spur gear in external gear pump[J]. Mechanism and Machine Theory, 2017, 117: 114-132.
[2] Sun F, Ji H, Yang S, et al. Numerical simulation and visualization study of cavitation characteristics in the high-speed linear-conjugate internal gear pump[J]. Flow Measurement and Instrumentation, 2025: 103068.
[3] Yu B, Yao C, Chen J, et al. Simulation and Experimental Study on Thermal Characteristics of Linear Conjugate Internal Gear Pumps[J]. Applied Sciences, 2025, 15(10): 5728.
[4] Chai H, Yang G, Wu G, et al. Analysis of straight conjugate internal gear pump through numerical modeling and experimental validation[J]. PloS one, 2022, 17(7): e0270979.
[5] Zongbin C, Lin H, Jian L. Design and analysis of conjugated straight-line internal gear pairs[J]. International Journal of Precision Engineering and Manufacturing, 2021, 22(8): 1425-1440.
[6] Jiang Chuang, Su Jianxin, Deng Xiaozhong, et al. Equivalent Modification of Tooth Profile Angle of Quasi-Hypoid Gear Based on Forming Method [J]. Mechanical Design, 2021, 38(10): 47–52.
[7] Wang Zhiyong, Liu Xiaolong, Liu Xin, et al. Research on Correction Algorithm of Large Gear Tooth Profile Error in Cycloid Bevel Gear Forming Method [J]. Mechanical Transmission, 2020, 44(09): 21–26.
[8] Ming Xingzu, Fang Shuguang, Wang Hongyang. Tooth Surface Profile Error Correction in Face Gear Grinding [J]. China Mechanical Engineering, 2018, 29(17): 2031–2037.
[9] Yu B, Ting K. Free-form conjugation modeling and gear tooth profile design[J]. Journal of Mechanisms and Robotics, 2013, 5(1): 011001.