Stress–strain behavior of discontinuous blades for axial mine fans

Abstract

The study is aimed at designing of blades such that preserve strength at the tip sped not higher than 140 m/s. Because of high rotary speeds, cast blades lack the wanted strength. Thus, it is necessary to design light-weight blades to increase rotary velocity fans. Using the finite element method in ANSYS, strength calculations are performed for blades of varied cellular structures; the stress and strain patterns versus rotor speed are obtained. The cellular structure blades made of aluminium alloy AK7 allows 1.8 times increase in the rotor speed and delivery of an axial fan series VOD.