The wind resistance loss is the energy loss caused by the rotation of the pinion and the big gear in the oil and gas space of the gearbox. The factors affecting the wind resistance loss mainly include the diameter of the gear, the concentration of oil mist in the gear box and the speed of the gear. For the gear transmission of high-speed wheel drive system, the wind resistance loss accounts for a large proportion of the total power loss, so the analysis of the wind resistance loss can make the analysis of the total efficiency of the gearbox more accurate.
Anderson and Loewenthal gave the calculation method of wind resistance loss. This method considers the dynamic viscosity of the oil and gas mixture in the gearbox, and then obtains the calculation formula:
Where: Pw – wind resistance loss power, kW; B – gear width, m; R – radius of gear indexing circle, m; N – gear speed, r/min; μ— Dynamic viscosity of oil and gas mixture in gear box, cP.