Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
Electric Vehicle Fan Balancing Variation According to Speed
Submission Author:
ricardo moraes , PE , Brazil
Co-Authors:
Tiago Leite Rolim, ricardo moraes
Presenter: ricardo moraes
doi://10.26678/ABCM.COBEM2017.COB17-0178
Abstract
Fan blades undergo deformation during their operation due to aerodynamic loads, resulting in the modification of the mass distribution of the system, which directly influences the rotor balancing. Therefore, if a rotor is balanced at specific speed, the unbalance during operation may change if the speed is different. In automotive vehicles, the electric fan responsible for the cooling of the power train is susceptible to operation at different speeds. If the balancing is not done correctly, the vibration in the steering wheel can reach unacceptable levels by the customer, causing quality problems. Through experimental tests, we used the influence coefficient balancing methodology to measure the influence of speed on the operational unbalance of electric vehicle fans. The results showed that the speed of rotation have a strong influence on the balancing of the fans and, if neglected, may turn it impossible to respect the design’s unbalance limits. If the behavior of the unbalance variation is studied, it is possible to adjust the balancing methodology by modifying both the position and the value of the balance mass to guarantee the level of operational unbalance.
Keywords
Flexible Rotor Balancing, Balance of Electric Fans, Operational Balancing
