Print ISSN: 1681-6900

Online ISSN: 2412-0758

Keywords : Gear Design

Effect of Shaft Misalignment on The Stresses Distribution of Spur Gears

Hani Aziz Ameen

Engineering and Technology Journal, 2010, Volume 28, Issue 7, Pages 1321-1339

Shaft misalignment is considered as one of the common repeated
problems in most rotating machineries , which leads to generate vibrations and
extra dynamic loads on transmitting gears teeth, also leads to non- uniformity in
distribution of applied load along the meshing tooth face by being concentrated on
one side of tooth face. The present work concentrated on the analysis of stresses
generated on transmitting gear tooth, also studied the effect of misalignment angle
on stress distribution and its concentration. This is important for the gear design
and those who works in gear maintenance , because fracture is expected to initiate
and propagate at locations of stress concentration . ANSYS program using finite
element technique had been used, as this program is efficient and accurate tool in
stress analysis, especially for complicated shapes. Gear tooth model had been
analyzed using finite element method in three dimensions. After calculating
transmitted load and dynamic load, misalignment angle had been changed from
(0°,0.2°,0.3°,0.4°,0.5°) then its effect on distribution of applied load had been
calculated. The finite element program (ANSYS) had been executed for cases of
misalignment angle (0°,0.2°,0.3°,0.4°,0.5°). The results showed clearly, that the
stresses distribution and its concentration on tooth changed with misalignment
angle and the equivalent stress is direct proportional with the misalignment angle.
According to the values of generated stresses, the tooth fracture can be predicted