Measures to eliminate or reduce noise in PU timing belt

Noise control mainly starts from two aspects: one is to find a way from the sound source, that is, to eliminate or weaken the strength of the sound source, which is the fundamental method of PU timing belt to control noise, and is also the focus of this article; the second is from the propagation of noise Take measures such as sound absorption and sound insulation to reduce or shield the transmission of noise. The analysis of the noise source of the synchronous belt drive has two main aspects: on the one hand, it is caused by the excitation of unbalanced centrifugal force when the two pulleys rotate, and on the other hand, it is caused by the gas disturbance when the belt and the pulley are engaged Produce aerodynamic noise. The main factors for noise generation in two aspects are listed below. The main factors causing the unbalance of the rotation are the shape tolerance and position tolerance of the pulley itself, including the tooth tolerance of the pulley, the tooth thickness tolerance, and the axial and radial runout. The higher the manufacturing accuracy of the belt and the pulley, the smaller the impact during meshing, the higher the transmission accuracy of the PU timing belt, and the lower the noise must be. Since the PU timing belts and pulleys are produced by professional manufacturers, they can effectively control the manufacturing accuracy, and will not be repeated here. Parallelism of two pulley shafts: In general, as the parallelism error increases, the sound pressure level gradually increases. If the object is standing on the conveyor belt, it will accelerate from the standstill together with the conveyor belt. If the dynamic friction factor between the object and the conveyor belt is large, the acceleration is relatively small, the object and the conveyor belt remain relatively stationary, and there is static friction between the object and the Acceleration is the result of static friction, so objects must be subject to friction along the direction of the conveyor belt; if the object The dynamic friction factor between the body and the conveyor belt is small, and the acceleration is relatively large. The object and the conveyor belt cannot stay relatively stationary. The object will not keep up with the movement of the conveyor belt, but it still has sliding friction between the ground and the accelerated movement forward. Force, the acceleration of the same object is the result of this friction, so the object must be subject to friction in the direction of the conveyor belt.