Helical Gear Profiles Modification to Reduce Noise

The sound is created by gears mesh is an example of sound pollution in industries. In the present study, the sound pressure level of a pair of mesh helical gear is simulated. First stress distribution of a pair of helical gear is simulated by finite element software Abaqus. Then the results are verified and to use in later parts of the study. After the sound pressure level is simulated in mesh of helical gear teeth. To verify, the sound pressure level is achieved by pressure level equation and compared with standard noise level. In this study, the tooth profile of gear is modified to reduce the sound of mesh of helical gears with Kiss Soft software. The profile modification is done in two way tip rounding and generate cylindrical gear with hobbing cutter. The results of the study have shown tooth profile modification by tip rounding is the best result to decrease noise.