Uma contribuição para a redução de vibrações de um motor de combustão interna rotativo do tipo Twin-Rotor Piston

Abstract

The following work presents two methods to reduce vibration in a rotary engine described as Twin Rotor Piston (TRP). The first method consists in balancing moving parts, from topological optimizations, avoiding stresses from unbalance. The second method was a more precise choice of bearing type with the objective of adapting to stress demands and consequently reducing vibration. Commercial software was used in the section of balancing to change geometry of parts in order to converge the center of mass with center of rotation. These geometric changes were certified in a stress test in the software, and only were accounted best results. In choosing the bearings section, the available space and capacity to withstand static loads and mass were considered. One of the needle bearings chosen was 314.0% more efficient in static loading, approximately 100g lighter, and had 61.5% smaller diameter when compared to the ball bearing.