Based on the objective of reducing vibration and noise of helical gears, taking the helical gear pair of a reduction gearbox of an electric vehicle as an example, a systematic numerical simulation analysis and experimental study were carried out on the influence of helical gear parameters (such as helix...
The efficiency change curve of the sample gearbox under different working environment parameters is drawn by using Matlab software. The relationship between kinematic viscosity, high multiple of high-speed gear teeth, friction coefficient and total efficiency is shown in Figure 1. As shown in Figures 1 (a) and 1 (b),...
The total efficiency of the gearbox is not only related to its design parameters, but also to its different working environment parameters. On the premise of determining the size of the gearbox, its total efficiency is mainly related to the input power P, the input speed n, and the...
1. Setting of working environment parameters of gearbox In order to obtain the influence of different design parameters of the gearbox on the total power more accurately, it is necessary to preset the working environment parameters of the gearbox on the premise of meeting the actual situation. Parameter name...
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...
The oil mixing loss of the gearbox mainly comes from the friction loss between the lubricating oil and the internal components of the gearbox. The influencing factors of the oil mixing loss mainly include the viscosity of the lubricating oil, the input speed, the operating temperature, the gear helix...
At present, most of the cars produced and sold on the market are traditional fuel vehicles. Fuel cars bring many conveniences to people’s lives, but at the same time, they also cause serious pollution to people’s living environment and the depletion of oil resources. In order to alleviate the...
Only on the basis of understanding and mastering the mechanism of transmission noise of electric vehicle reduction gearbox and helical gear pair, can we suit the remedy to the case, so as to improve the characteristics of gear vibration and noise by rational use of gear modification technology. Therefore,...
At present, most agricultural tractors in China use mechanical gear transmissions, which use meshing sleeves or synchronizers to shift gears. The selection of gears is less and the driver needs to judge the shift time according to experience, which is easy to waste engine power and improve the working...
The power loss of the gearbox mainly includes oil stirring loss, wind resistance loss, gear meshing loss and bearing loss. 1.Loss of oil stirring power The oil stirring loss of the gearbox mainly comes from the friction loss between the lubricating oil and the internal components of the gearbox....