A method for evaluating the safe state of generator pump-through rotor

Abstract

The invention provides a method for evaluating safety state of withdrawing and penetrating through a rotor of a generator. The method comprises the steps of: calculating to obtain attitude informationof the rotor by utilizing three-axis accelerometer data after the rotor moves; subjecting end points of the rotor cylindrical sections with different diameters in a stator inner bore to spatial projection according to the attitude information and the length of the rotor in a stator during the rotor withdrawing and penetrating process; projecting all the end points into a circular surface, which is equal to the stator inner chamber in size, of the excitation side end, wherein all the projection points are kept in the end surface circle of the stator as long as the rotor is not collided; dividing regions of safety state concentric circles in the end surface circle of the stator; and judging a safety state of each cylindrical section according to the area where the projection points are located, so that the safety state of the rotor withdrawing and penetrating process in the generator overhauling process is evaluated. Therefore, the safety state evaluation method is more comprehensive and reliable.

Description

technical field [0001] The invention relates to the field of generator pull-through rotor monitoring, in particular to a method for evaluating the safety state of a generator pull-through rotor. Background technique [0002] The rotor of a large-capacity generator weighs 50 to more than 100 tons. When the rotor is pumped through, when the rotor is hoisted by the crane alone, the staff in the stator chamber will remind people to push the opposite wheel on the excitation side to ensure that the rotor Without swinging from side to side, the work of pumping through the rotor is completed. The gap between the rotor guard ring and the inner stator is very small, generally 30mm. Currently, the method used to ensure that the gap between the rotor guard ring and the inner stator is in a safe state is generally confirmed by the field staff through manual measurement of the distance during the rotor pumping process. This results in long working hours, low efficiency, and the danger of...

AI Technical Summary

Problems solved by technology

The gap between the rotor guard ring and the inner stator is very small, generally 30 mm. Currently, the method used to ensure that the gap between the rotor guard ring and the inner stator is in a safe state is generally confirmed by field staff through manual measurement of the distance during the rotor pumping process. This results in long working hours, low efficiency, and the danger of being misunderstood by manual multiple transmissions

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