Patent Number: 9,970,328

Title: Method for barring a rotor of a turbomachine and barring apparatus for conducting such method

Abstract: A method for barring a rotor of a thermally loaded turbomachine includes stopping normal operation of the turbomachine; providing a barring device for rotating the rotor about a machine axis; coupling the barring device to the rotor; letting the rotor cool down during cool down of the rotor rotating the rotor by means of the barring device. A damage of the machine due to thermally induced buckling during the barring process is avoided by consecutively determining the force or torque applied to the rotor by the barring device for rotating the rotor and/or the circumferential speed of the rotor during barring. The rotation of the rotor is controlled by means of the barring device in dependence of the determined force or torque and/or circumferential speed in order to reduce a bending or imbalance of the rotor, which is due to a nonuniform temperature distribution on the rotor during cool down.

Inventors: Haerms; Axel (Nussbaumen, CH), Staehli; Felix (Baden, CH), Rauch; Marc (Frenkendorf, CH), Knopf; Eric (Wurenlingen, CH)

Assignee: ANSALDO ENERGIA IP UK LIMITED

International Classification: F01D 21/12 (20060101); F01D 25/36 (20060101); F01D 25/34 (20060101); F01D 21/06 (20060101)

Expiration Date: 2022-05-15 0:00:00