External gear pumps are widely used in fields such as aerospace, agricultural machinery, and hydropower due to their advantages of high flow rate, light weight, insensitivity to oil, and simple structure. The rotor is an important component of gear pumps, and most of the gear rotors in traditional gear pumps use involute tooth profiles. In order to address the defects of involute gear pumps in engineering practice, such as radial force imbalance, low speed, high noise, large pressure pulsation, and short service life, a double arc helical gear pump with a sine curve tooth profile as the transition curve is proposed. Due to the characteristics of low pressure pulsation, low noise, high efficiency, large displacement, and long service life, the double arc helical gear pump has great research value for stable operation at high speed and high pressure. As an important component of energy transmission in gear pumps, how to improve stability and safety of the rotor will have a profound impact on the development of double arc helical gear pumps.
Currently, with the development of finite element software, many research methods and theoretical achievements in fluid mechanics have been applied in fluid solid coupling; Deng Bin et al. conducted research using the fluid structure coupling method to accurately obtain the internal flow field and power loss issues. Qi Zhiyuan et al. used the fluid structure coupling method to analyze the influence of the flow field on the pump body and double arc helical gear pair of the internal meshing double arc helical gear pump; Li Wei et al. used the method of synchronously solving the internal flow field and impeller structure of a mixed flow pump to study the mechanical characteristics of the impeller of the mixed flow pump. Most of the research objects are internal meshing gear pumps, while there is relatively little research on double arc helical external meshing gear pumps. Therefore, it is necessary to build a simulation platform combining Fluent fluid mechanics and ANSYS kinematics to eliminate the limitations of a single platform on the simulation results.