Estudo de caso: análise do par de engrenagens de um alimentador vibratório

Abstract

Helical gears present higher transmission efficiency compared to spur gears due to the inclination of the teeth, which provides smoother meshing, increases load capacity, and significantly reduces system noise and vibrations. The main stress points in a gear are located on the tooth flank and the root fillet, where cracks and pitting (small craters on the tooth surface) may occur. The ANSI/AGMA standard is referenced in the industry as the benchmark for gear manufacturing due to its method for calculating bending and contact stresses with good accuracy for design purposes. The objective of this work is to carry out the design of a pair of helical gears for a vibrating feeder (equipment used in crushing plants) using ANSI/AGMA analytical methods and to propose parameter changes for a more suitable gear pair. The helical gear pair shows high safety factor values according to the AGMA standard and can be replaced by a pair of spur gears with reduced dimensions, which offers advantages in manufacturing, assembly, and continuous operation, while maintaining good strength and reliability under severe conditions.