THREADED SHANK, CONNECTION JOINT, GAS TURBINE ENGINE AND METHOD FOR ASSEMBLING TURBOMASHINE ROTOR OF GAS TURBINE ENGINE Russian patent published in 2017 - IPC F01D5/06 F16B35/04 

FIELD: machine engineering.

SUBSTANCE: threaded shank of the turbomachine rotor is designed to interact with the threaded additional component of the turbomachine rotor having the cylindrical first thread with a constant pitch and a constant profile angle. The threaded shank has the second thread with a constant pitch and a constant profile angle and the third thread with a constant pitch and a constant profile angle. The profile angle and the pitch of the first, second and third threads are identical. The second and third threads are designed to interact with the first thread. The second and third threads are axially spaced apart by a thread-free zone. The second thread helix and the third helix are axially offset relative to each other, when they are engaged with the threaded additional component in a non-rotating state with preload. Another invention of the group relates to a connection joint of the turbomachine rotor designed to provide the interaction of a tie rod containing a threaded shank with a lock nut which is a threaded additional component. The threaded shank and the additional component are designed as it was mentioned above. One more invention relates to a gas turbine engine comprising the above-mentioned connection joint. When the turbomachine rotor of the gas turbine engine is assembled, the second and third threads are engaged with the first thread.

EFFECT: increased fatigue strength of the connection joint of the gas turbine engine rotor.

14 cl, 6 dwg