Steady Heat Characteristics Finite Element Analysis Of Transmission Components In Power Spilt Device

Hybrid electric vehicle (HEV) which has the merits of electric vehicle（EV） andconventional vehicle (CV) has achieved the purpose of energy saving andenvironmental. With the combined advantages of the series and parallel HEV, theparallel-series HEV exhibits better fuel efficiency and dynamic performance. As oneof the core components in HEV, Power Spilt Device (PSD) plays a key role in energycoupling and decoupling during the model switching processes. Developing highreliability and high efficiency PSD is crucial for a parallel-series HEV development.In this paper, the thermal-mechanical coupling analysis is implemented for bevelgears in differential-based PSD, the distribution of the temperature and thermal stressare obtained. This study includes the following:First, a thermal network model is established use integrated parametric principleaccording to the internal heat power divider line. By calculating the thermal resistanceof the power loss, get the overall temperature of the various components of the powerinside the dispenser, and form a thermal analysis method for overall PSD.Second, precise bevel gear model based spherical involute is established byCATIA, and meshed using HYPERMESH, finally, the finite element analysis of thegear is conducted by ABAQUS software. In order to reduce the calculated time, theprocess that frictional heat flow moves along the surface of the tooth profile issimulated used load step that cyclic loading, the size and distribution of thetemperature field of steady stat is obtained. The results show that the temperature ofthe tooth surface is uneven distribution, there are a larger peak in tooth tip and toothroot, and the temperatures of the tooth root is maximum, it forms a methods of bevelgear modeling, meshing and finite element thermal analysis, providing a theoreticalbasis for the design of the data based on anti-glued bevel gears and lubricationsystems designed for PSD.Finally, based on thermal analysis, the thermal deformation and thermal stressesunder the uneven temperature distribution in the tooth are obtained by converting thetype of unit and load step and loading the thermal analysis results file to thermal stress analysis. The results show that the thermal deformation of the tooth makes the tooththickness and the tooth width increase, and thermal stress in the tooth roots is greater.It provides a theoretical basis for the design of the bevel gear modification andbending fatigue.