Effect of Gear Oil on the Surface of a TransmissionGearbox

Abstract

Transmission Gearbox plays a vital role and essential part of an automobile. It provide torque and transmit power from one section to another. The torque is inversely related to speed i.e. lower speed have higher torque and vice versa. The main motive of this research work is to measure the surface temperature variation on the gearbox surface with the help of probe method. In this dissertation work, steady state thermal analysis of a gear train was performed by using Ansys 16.2 and apply probe method to get the temperature at a particular point on a gear surface. The analysis can be done to prevent the gearbox from failure. There are variant reason for the failure of transmission gearbox is meshing excitation, load fluctuation, thermal stress etc. For performing probe method with the help of steady state thermal analysis, two material i.e. SAE 8620 and AISI 9310 are consider foe manufacturing helical gear and rotating shaft. SAE 80W-90 gear oil were used as a lubricant in a transmission gearbox. In steady state thermal state, two boundary condition were applied i.e. gear oil temperature 70°C and 75°C and varying convective heat transfer coefficient(h) 100 W/m² °K to 600 W/m² °K. In this analysis, the dynamic loading effect and gear oil heating on the surface were considered. The simulation results were found in the form of colour code having temperature profile with maximum temperature at 70°C is 69.60°C and 75°C is 74.55°C. As steady state thermal analysis was completed, apply probe method to find out the variation on gearbox surface. The Solid Edge and Pro-E are the designing software which are used in designing the transmission gearbox.