(1) With the increase of the input speed of the driving wheel, the oil film pressure and thickness increase, while the maximum temperature rise of the oil film increases significantly. At higher rotational speed, the change of load has little effect on oil film pressure, film thickness and temperature rise. The increase of elastic modulus of spiral bevel gear material will increase the oil film pressure and temperature rise, and reduce the oil film thickness. With the increase of lubricating oil inlet temperature, the oil film pressure, oil film thickness and oil film temperature rise all decrease.
(2) High rotating speed causes Hertz pressure peak and secondary pressure peak to merge in EHL. The classic central flat oil film phenomenon is not obvious, and the oil film distribution becomes sharp. When the viscosity of lubricating oil increases, the central oil film flattening phenomenon gradually appears.
(3) The degree of influence on the maximum pressure of the oil film in the working condition parameters from large to small is elastic modulus, viscosity, rotational speed and power; The degree of influence on the maximum temperature rise and minimum oil film thickness of the oil film is viscosity, rotational speed, elastic modulus and power from large to small.
(4) When the inlet temperature of lubricating oil is 140 ℃, the specific thickness of oil film of spiral bevel gear at the design point is 0 93. The oil film thickness of spiral bevel gear under idle condition is 0 71, dry friction of exhausted oil will occur. When the inlet temperature of lubricating oil is 120 ℃, the specific thickness of oil film at the design point is 1 1. At this time, the spiral bevel gear is in the state of mixed lubrication. To sum up, reducing the operating temperature of lubricating oil, selecting softer spiral bevel gear materials or increasing the speed of spiral bevel gear can effectively improve the harsh working environment of spiral bevel gear.