Abstract
In a bolted rotor with curvic couplings, the structure integrity of curvic coupling tooth may be damaged and local stress concentration may occur due to bolt holes. An optimization model for the power turbine bolted rotor with curvic couplings was established by considering the bolt axial preloading. Then the structure optimization design of power turbine rotor curvic coupling was completed based on ANSYS optimization platform. The results showed that the strength weakening effect of the bolt holes on the tooth root of curvic couplings is greater than that of concave (convex) tooth itself, and the bolt holes radial distribution near the pitch diameter of curvic couplings was beneficial to reduce the stress and improve the stress distribution of curvic couplings. Comparing with the original design, the maximum equivalent stress of the optimum curvic couplings was reduced by 9.1% and the max contact stress on the working face was reduced by 44.6%, which improves the tooth root stress distribution more homogenous and has no effect on the global deformation of the whole power turbine rotor.
| Translated title of the contribution | Design Optimization on Curvic Couplings of A Power Turbine Rotor |
|---|---|
| Original language | Chinese (Traditional) |
| Pages (from-to) | 969-977 |
| Number of pages | 9 |
| Journal | Jixie Kexue Yu Jishu/Mechanical Science and Technology |
| Volume | 42 |
| Issue number | 6 |
| DOIs | |
| State | Published - Jun 2023 |