Methods for Reducing the Spectrum of Noise in Toothed-Belt Drives
Methods for reducing the noise level during the operation of a toothed belt transmission with conventional steel pulleys and modified rubber pulleys, and the use of noise-insulating and noise-absorbing casings are proposed. The purpose of the study is to study and propose a number of ways to reduce the noise level using the example of a toothed-belt drive. The objectives of the study are to obtain regularity in reducing the noise level of the air distribution zone through the use of pulleys made of materials with damping properties and sound-absorbing casings. The research involved a set of experimental studies to find effective methods and techniques for reducing noise in the air distribution zone. A number of experiments were carried out with the use of modified pulleys of the toothed-belt drive to achieve the set task. The frequency spectra of noise are obtained depending on the use of a damped toothed pulley. The dependences of the noise level on the type of the damping cover of the casings are obtained. Practical recommendations for noise reduction have been developed on the basis of the proposed recommendations for the sound pressure of the air distribution zone from the values of their parameters and operating models.