THREADED SHANK, CONNECTION ASSEMBLY AND GAS TURBINE ENGINE FOR IMPROVED FATIGUE LIFE OF THREADS

摘要

A threaded shank for engaging with a threaded further component is provided herein, the further component having a cylindrical first thread with a uniform first thread pitch and a uniform first thread angle, the threaded shank including a second thread with a uniform second thread pitch and a uniform second thread angle and including a third thread with a uniform third thread pitch and a uniform third thread angle along an axial expanse of the third thread. The first thread angle and the second thread angle and the third thread angle being substantially identical, the first thread pitch and the second thread pitch and the third thread pitch being substantially identical, wherein the second thread and the third thread are spaced apart axially by a thread-free region, a second thread helix and a third thread helix have an axial offset to one another.

主权项

1. A threaded shank of a turbomachine rotor for engaging with a threaded further component of the turbomachine rotor, the threaded shank adapted to engage with the further component, the further component comprising a cylindrical first thread with a uniform first thread pitch and a uniform first thread angle along an axial expanse of the first thread, the threaded shank comprising:
a second thread with a uniform second thread pitch and a uniform second thread angle along an axial expanse of the second thread and comprising a third thread with a uniform third thread pitch and a uniform third thread angle along an axial expanse of the third thread, the first thread angle and the second thread angle and the third thread angle being substantially identical, the first thread pitch and the second thread pitch and the third thread pitch being substantially identical, the second thread and the third thread being engageable with the first thread, wherein the second thread and the third thread are spaced apart axially by a thread-free region, and a second thread helix of the second thread and a third thread helix of the third thread have an axial offset to one another.