Abstract:
Research of the noise of rolling bearing is an important research direction and it is also one of the future development directions of bearing research. However, in the research of rolling bearing noise, most of the current researches only focus on qualitative analysis and experimental analysis, while only few researches have been done for establishing a mathematical model to quantitatively calculate the rolling bearing noise. In this paper, through the mechanical analysis of deep groove ball bearing, a bearing mathematical model is established which can calculate the orbit of inner ring center and the trajectory of each roller's center. Combining with the theory of acoustics and the wave equation, the deep groove ball bearing inner ring is regarded as a cylindrical sound source, and each rolling element is regarded as a spherical sound source. And through this theory, a calculation model for calculating the vibration and noise of deep groove ball bearing inner ring and rolling elements is established. Through a specific example, the influences of rotational speed and radial load on the bearing noise of fixed point and the change rule of the bearing noise along the axis direction of rolling bearing are studied, and the curves of these effects are plotted. With the increase of rotation speed, bearing sound pressure will also increase; with the increase of the bearing radial load, bearing sound pressure will also increase, and this bearing radial load change trend is fast at beginning and then becomes slow. In the axis direction of bearing, with the increase of distance, the total sound pressure of bearing inner ring and each rolling element gradually decreases, which shows a nonlinear process.