Why is the transmission shaft unbalanced?
发布时间：2017.05.23 新闻来源：邢台远拓汽车零部件制造有限公司
The drive shaft assembly in axial cardan shaft, drive shaft dynamic sliding spline clearance, the drive shaft assembly at two ends of the centering accuracy and speed of transmission shaft under elastic deformation, the drive shaft for spot welding process balance and other factors, can change the drive shaft assembly is not balanced degree.
As a result of these reasons, the transmission shaft will leave its equilibrium position, and then the bending vibration relative to the equilibrium position will occur. Because of eccentric centrifugal force caused by eccentric mass, the rotating transmission shaft is the disturbing force that causes the bending vibration of the transmission shaft. The frequency of this disturbance is equal to the speed of the drive shaft. When the rotation speed of the transmission shaft is equal to the natural frequency of its bending vibration, resonance occurs, resulting in a sharp increase in amplitude and the risk of the fracture of the drive shaft. Generally speaking, the speed at this time is the critical speed of the drive shaft, also called "dangerous speed"".
Because of the unbalance of drive shaft assembly, the car started, the shaft will produce noise, vibration; change the speed when the sound is more obvious, when coasting in neutral sound will be more clearly from the transmission shaft of the transmission shaft, which will obviously bend and break.
