Vibration Characteristics Of An Open Single Spur Gear System

Abstract

Vibration is commonly used in the inspection of gear systems to indicate healthy
operating conditions. This research paper relies on studying some of the characteristics of the
vibration associated with the operation of an open gear system consisting of a pair of spur gears
to investigate the effect of changing gear design variables on the values of the operating system
frequencies. The theoretical side focused on finding equations for some of the natural
frequencies of the system, the ANSYS program was also used to simulate a system model to
obtain natural frequencies according to determinants closely related to the operation and design
of gears. On the practical side, the operating frequencies measured by a three-axis Arduino
sensor to find the acceleration signals in the time domain then convert it to frequency signals in
the hertz unit by FFT function. Three types of gears were adopted, which differed in design by a
major factor, which is the module, 2 - 3 - 4 mm. The practical results were based on finding the
frequencies at four rotational speeds during normal and forced operation by three levels of
intensity are simple, medium, and high. The results showed a remarkable increase in the values
of the natural and operating frequencies when increasing the gear sizes that associated with an
increase in the module, as well as when increasing the rotational speed, which represents an
unhealthy condition for the operation of gear systems, especially when approaching the
resonance state.