METHOD FOR BARRING A ROTOR OF A TURBOMACHINE AND BARRING APPARATUS FOR CONDUCTING SUCH METHOD
First Claim
1. A method for barring a rotor of a thermally loaded turbomachine, comprising:
- stopping normal operation of said turbomachine;
providing a barring device for rotating said rotor about a machine axis;
coupling said barring device to said rotor;
letting said rotor cool down; and
during cool down of said rotor rotating said rotor by means of said barring device;
whereinthe force or torque applied to said rotor by said barring device for rotating said rotor and/or the circumferential speed of the rotor during barring are consecutively determined; and
the rotation of said rotor by means of said barring device is controlled in dependence of said determined force or torque and/or circumferential speed in order to reduce a bending or imbalance of said rotor, which is due to a nonuniform temperature distribution on said rotor during cool down.
3 Assignments
0 Petitions
Accused Products
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.
51 Citations
14 Claims
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1. A method for barring a rotor of a thermally loaded turbomachine, comprising:
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stopping normal operation of said turbomachine; providing a barring device for rotating said rotor about a machine axis; coupling said barring device to said rotor; letting said rotor cool down; and during cool down of said rotor rotating said rotor by means of said barring device; wherein the force or torque applied to said rotor by said barring device for rotating said rotor and/or the circumferential speed of the rotor during barring are consecutively determined; and the rotation of said rotor by means of said barring device is controlled in dependence of said determined force or torque and/or circumferential speed in order to reduce a bending or imbalance of said rotor, which is due to a nonuniform temperature distribution on said rotor during cool down. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification