	US 11,946,385 B2
	Method for controlling the bending deformation of a turbomachine shaft at rest subjected to the residual heat of operation of the turbomachine
Clément Georges Henri Gorce, Moissy-Cramayel (FR); and Emelian Charles François Vsevolod Evqueny Tichtchenko, Moissy-Cramayel (FR)
Assigned to SAFRAN AIRCRAFT ENGINES, Paris (FR)
Appl. No. 17/426,357
Filed by SAFRAN AIRCRAFT ENGINES, Paris (FR)
PCT Filed Jan. 29, 2020, PCT No. PCT/FR2020/050137 § 371(c)(1), (2) Date Jul. 28, 2021, PCT Pub. No. WO2020/157432, PCT Pub. Date Aug. 6, 2020.
Claims priority of application No. 1900805 (FR), filed on Jan. 29, 2019.
Prior Publication US 2022/0098997 A1, Mar. 31, 2022
Int. Cl. F01D 25/34 (2006.01); F01D 21/00 (2006.01); F01D 21/08 (2006.01); F01D 21/14 (2006.01)

CPC F01D 25/34 (2013.01) [F01D 21/003 (2013.01); F01D 21/08 (2013.01); F01D 21/14 (2013.01); F05D 2270/02 (2013.01); F05D 2270/114 (2013.01); F05D 2270/331 (2013.01); F05D 2270/44 (2013.01); F05D 2270/821 (2013.01)]

6 Claims

2. A method for controlling the bending deformation of a turbomachine shaft at rest subjected to the residual heat of operation of the turbomachine, wherein the shaft is rotated at a rotation speed comprised between 0.1 and 50 revolutions per minute only when a bending deformation deflection of the shaft is greater than a first predetermined value, wherein rotating the shaft is stopped when both the deflection of the shaft is less than or equal to a second predetermined value, the second predetermined value being less than the first predetermined value, and at the end of a second predetermined period counted from the time where the deflection of the shaft becomes less than the second predetermined value.