Influence of Pressure Angle in Spur Gear Vibration

Spur Gear vibration is one of the major indispensable parameter in Maintenance division of an operating plant. Many methods have been adopted to control the vibration in gears. An approach of understanding the influence of pressure angle in spur gear vibration is required in the modern trends. Pressure angle influence in root stress has been analyzed earlier by some of the researchers, but may not be in vibration. Three steel spur gears having the pressure angle of 14?0, 200 and 250 with the same face width, pitch circle diameter and number of teeth are selected for this analysis. The gears are loaded with a torque of 6.25, 12.5, 18.75, 25, 38 and 50Nm respectively. Loads are given as a transmitted and radial force on the gear tooth. A frequency response analysis has been done on the above gear using FEA Software. The result shows that gear having 200 pressure angle is more effective in controlling the vibration than the other two pressure angles. Also gear having 250 is also being effective in controlling the vibration than the gear having 14?0. From this interpretation, it is concluded that even a small manufacturing error which leads to pressure angle variation influences more in gear vibration.