Numerical investigation on transient thermal behavior of multidisk friction pairs in hydro-viscous drive

In order to research the thermal behavior of multidisk friction pairs in hydro-viscous drive, three-dimensional transient temperature model is established for numerical simulation. As the force differences between any two adjacent friction pairs are significant, the normal pressures on all the surfaces are obtained from the principle of force equilibrium and then the heat flux acting on the related surfaces are also deduced. The process of the disksʹs heat conduction is analyzed in detail. The research results show that twelve frictional subregions divided by the grooves present similar temperature distributions and hot spots. The maximum temperature along the axial direction of the multidisk friction pairs occurs in the second friction pairs near the hydraulic piston. The temperature expansion at the non-grooved regions is larger than that at the grooved regions and the radial temperature gradient in the separator disks is larger than that in the friction disks. There may not be clear deformation both at the grooved regions and near the grooved regions. However, the non-grooved regions are prone to be deformed and the friction linings are more likely to be deformed.