Research on the effects of double arc oil groove parameters on oil film torque in hydro-viscous drive

In order to study the influence of double arc oil groove parameters on oil film torque in hydro-viscous drive, the numerical simulation and parameterized analyzing platform were built. The flow field characteristics were carried out using CFX. The parameter analysis platform was integrated with parameterized design of grooves, numerical simulation, and design of experiment (DOE). The effects of groove parameters on output torque were analyzed. The results indicate that the output torque consists of shear torque and impact torque, and the oil film shear torque plays a more important role in total torque. The shear torque is mainly affected by coefficient of effective area and velocity distribution. The velocity distribution and dynamic pressure on sidewalls are the main influencing factors on impact torque. The effect of eccentricity and oil grooves depth on the output torque is positive, but others are negative. In addition, the eccentricity and inner diameter of eccentric circle are sensitive parameters. The effects of oil groove parameters on oil film torque are analyzed accurately using the parameterized analyzing platform that is integrated with CAD, CFX, and DOE. A new method and theoretical foundation are provided for design of complex oil grooves in hydro-viscous drive.